JP3636893B2 - Link type displacement meter - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a link-type displacement meter, in particular, a proximity structure by connecting a plurality of connecting points via both ends (fixed points) of a measurement point through a relay rod, a track roof construction, a pipe roof construction, a shield tunnel construction and a mountain retaining construction The present invention relates to a link type displacement meter capable of measuring a horizontal displacement and a vertical displacement of an object and surrounding ground on a continuous line.
[0002]
[Prior art]
In civil engineering and construction work, etc., the ground tends to loosen due to excavation, the stress relief of the ground due to tunnel construction, and the surrounding ground and nearby structures due to other causes are unavoidable.
[0003]
The excavation work and tunnel work, etc., cause the ground to loosen, reduce the strength of the ground, cause the horizontal and vertical displacements by releasing the stress on the adjacent ground, subsidize the ground, and other deformations. It can be considered that it affects the adjacent structure through the ground.
[0004]
Although protection work has been carried out to prevent ground deformation caused by these causes, it was impossible to completely eliminate the deformation. Therefore, monitoring of the deformation of the adjacent structure is necessary for excavation work and tunnel construction.
[0005]
[Problems to be solved by the invention]
However, conventionally, most of the measurement of the deformation has been a “point” measurement. This “point” measurement was mainly based on vertical displacement by a subsidometer and horizontal inclination by an inclinometer, but it was difficult to grasp the overall trend.
[0006]
The present invention is intended to solve the above-described problems, and the object of the present invention is to provide a link type displacement meter that can measure the displacement of adjacent structures and surrounding grounds accompanying various constructions on a continuous line. It is to provide.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention comprises a fixing portion and a sensing portion each provided with a connecting means that can be connected to the outer end portion by 90 degrees in the circumferential direction with respect to the relay rod. The sensing part is in a cylinder that is pivotally supported by the fixed part, and can follow the pivoting direction of the cylinder, and the pivoting direction of the cylinder sensed by the spring band Means for converting the rotation angle of the structure into a displacement amount, and connecting to a free length via a relay rod, the horizontal displacement, horizontal and vertical of the ground around the construction and adjacent structures The displacement in the direction and the displacement in the vertical direction can be measured on a continuous line.
[0008]
Further, in the invention according to claim 2, the spring band plate is formed on the inner end portion of the core member whose base end portion is fixed to the inner end portion of the fixing portion and whose distal end portion is fitted to the outer end portion of the cylindrical body. It is characterized in that it is in contact with the formed base part through a protrusion so as to warp in a state exceeding the center line in the cylinder body, and the rotation angle of the cylinder body due to the warping of the spring band plate and its return is spring elastic Is obtained with good sensitivity and can follow any rotation angle in the warp direction and return direction of the spring strip .
[0009]
Displacement of the spring strip are those sought Hizumigeji installed in the base side of the spring strip.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, the present invention will be described based on embodiments shown in the accompanying drawings. 1 is a partially cutaway perspective view showing the displacement meter of the present application, FIG. 2 is an exploded perspective view of a fixed portion of the displacement meter of the present application, and FIG. 4 is a schematic cross-sectional view showing a state in which the present displacement meter is connected, FIG. 4 is a schematic plan view when the present displacement meter is installed along the track, and FIG. 5 is a diagram showing the state where the present displacement meter is installed along the track. It is side surface sectional drawing shown.
[0011]
The displacement meter 1 of the present application includes a fixing portion 4 and a sensing portion 10 each having connecting means 2 and 3 for connecting to the relay rod R at the outer end.
[0012]
As shown in FIG. 2, the fixing portion 4 is provided with flat surfaces 5 and 5 by cutting the opposing surfaces (upper and lower surfaces in the drawing) of the inner end portion 4 a, and the inner end portion 4 a It is vertically divided so as to pass through the center, and one side 4 a ′ can be fixed with a set screw 6 so as to be separated.
[0013]
The connecting means 2 with the relay rod R provided in the fixing portion 4 extends the outer end portion 4b of the fixing portion 4 so as to be fitted into one end portion R ′ of the relay rod R, and the outer end portion. Corresponding screw holes 8 and 9 are provided in 4b and one end R 'of the relay rod R so that a set screw 7 can be screwed.
[0014]
One of the screw holes 8, 9 (screw hole 9 in the figure) is provided at a position equally spaced in the circumferential direction, and is connected with a 90 ° phase shift when connecting the relay rod and the fixed portion. It can be done.
[0015]
The sensing part 10 is built in a cylindrical body 12 supported by the fixing part 4 so as to be pivotable about a pin 15 ′. The pin 15 ′ passes through a fitting portion between the forked pieces 15, 15 provided at the base end portion 12 a of the cylindrical body 12 and the flat surfaces 5, 5 of the inner end portion 4 a of the fixing portion 4.
[0016]
A means 11 for sensing the rotation angle of the cylindrical body 12 in the pivoting direction is provided in the cylindrical body 12. The sensing means 11 is composed of a spring strip 19 that can follow the pivoting direction of the cylindrical body 12. The base end portion 19 a of the spring band plate 19 is clamped and fixed between the inner end portion 4 a of the fixing portion 4 at the same time when the one surface 4 a ′ is fixed by the set screw 6.
[0017]
The distal end portion 19b of the spring band plate 19 is spring-loaded to a base portion 21 formed on the inner end portion 13a of the core member 13 fitted to the outer end portion 12b of the cylindrical body 12 through a protrusion 20 provided on one surface thereof. Abutting by force. The core member 13 is integrally fixed to the cylindrical body 12 with a set screw 14.
[0018]
The spring band plate 19 can follow any rotation angle when the cylindrical body 12 rotates with respect to the fixed portion 4 around the pin 15 'in the direction of arrow a or b in FIG. For this purpose, the height of the projection 20 or the height of the base 21 is adjusted to warp the cylinder 20 beyond the center line 22.
[0019]
The connecting means 3 with the relay rod R provided in the sensing part 10 extends the outer end portion 13b of the core member 13 so as to be fitted into the other end portion R ″ of the relay rod R, and Corresponding screw holes 17 and 18 are provided in the outer end portion 13b and the other end portion R ″ of the relay rod R so that the set screw 16 can be screwed.
[0020]
One of the screw holes 17 and 18 (in the figure, the screw hole 18) is provided at a position equally spaced in the circumferential direction, and the other end R ″ of the relay rod R and the sensing part 10 are connected. At this time, the connection can be made with the phase shifted by 90 °.
[0021]
Inside the cylinder 12, there is provided means 23 for converting the pivot angle of the cylinder 12 sensed by the sensing means 11 into a displacement amount. The displacement converting means 23 is constructed by installing strain gauges 24, 25 on the back side of the base side of the spring band plate 19 via support members 24a, 25a.
[0022]
The strain gauges 24, 25 have the initial set position of the spring strip 19 as “0” and the rotation angle when the cylindrical body 12 rotates about the pin 15 ′ with respect to the fixed portion 4 as a displacement amount. It can be converted electrically.
[0023]
That is, the values obtained by the strain gauges 24 and 25 are accumulated via a computer (not shown), graphed, and stored. It is also possible to print out by operating a printer (not shown). Furthermore, it is of course possible to display the accumulated value in real time on a monitoring monitor (not shown) at the construction site, or to transmit it as an information signal to a signal base such as a railway.
[0024]
Next, the operation of the present displacement meter 1 will be described.
First, two fixed points A and B of the track 26 where ground deformation is predicted due to loosening of the ground due to excavation work in the vicinity of the track are defined, and relaying between the fixed points A and B as shown in FIG. A plurality of the present displacement meters 1 are connected via the rod R. At least one of the fixed points A and B is free in the axial direction.
[0025]
Then, the relay rod R is fixed to the track 26 in a free state in the axial direction via the support member 27 as shown in FIG. In the figure, 28 is a roadbed, 29 is a sleeper, and 30 is a ballast such as gravel.
[0026]
When connecting a plurality of the displacement sensors 1 via the relay rod R, it is possible to arrange them so that only the horizontal direction, the horizontal and vertical directions, and the vertical direction can be measured. .
[0027]
Thus, when the ground changes between the fixed points A and B, each displacement meter 1 of the present application is placed in the cylindrical body 12 that is pivotally supported by the fixed portion 4 around the pin 15 '. The sensing means 11 (spring strip 19) included in the sensor senses the rotational angle of the cylinder in the pivoting direction, and outputs the value obtained by the displacement converting means 23 (strain gauges 24, 25).
[0028]
The values are accumulated by a computer, graphed and stored. The information can be displayed in real time on a monitoring monitor at the construction site, and can be transmitted as an alarm signal to a train approaching the measurement point.
[0029]
【The invention's effect】
As described above, the present invention comprises a fixing part and a sensing part each provided with connecting means that can be connected to the outer end part by 90 degrees in the circumferential direction with respect to the relay rod. The part is in a cylindrical body that is pivotally supported by the fixed part and can follow the pivoting direction of the cylindrical body, and the rotational angle of the cylindrical body sensed by the spring band plate Is provided with a means for converting the amount of displacement into a displacement amount, so that a horizontal length and a vertical displacement of the ground around the construction and adjacent structures can be connected to a free length via a relay rod. Can be measured on a continuous line. Moreover, when connecting a plurality via relay rods, it is possible to arrange so that only horizontal measurement, horizontal and vertical measurement, and vertical measurement can be performed. Has an effect.
[0030]
Further, in the invention according to claim 2, the spring band plate is formed on the inner end portion of the core member whose base end portion is fixed to the inner end portion of the fixing portion and whose distal end portion is fitted to the outer end portion of the cylindrical body. Since it is characterized in that it is in contact with the formed base part via a protrusion so as to be warped in a state exceeding the center line in the cylinder, the warp of the spring band plate and the rotation angle of the cylinder accompanying its return both the obtained high sensitivity by utilizing the spring elasticity, an excellent effect of being able to follow in any angle of rotation of the warp direction and the return direction of the spring strip.
[Brief description of the drawings]
FIG. 1 is a partially cutaway perspective view showing a displacement meter of the present application.
FIG. 2 is an exploded perspective view of a fixing portion of the present displacement meter.
FIG. 3 is a sectional view showing a state in which two displacement meters of the present application are connected via a relay rod with a sensing direction shifted by 90 °.
FIG. 4 is a schematic plan view when the present displacement meter is installed along a track.
FIG. 5 is a side sectional view showing a state in which the displacement meter of the present application is installed along a track.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Displacement meter 2, 3 Connection means 4 Fixed part 4a Inner end part 4a 'of fixed part Single side 4b Outer end part of fixed part 5 Flat surface 6 Set screw 7 Set screw 8, 9 Screw hole 10 Sensitive part 11 Sensing means 12 cylinder 12a cylinder base end 12b cylinder outer end 13 core member 13a core member inner end 13b core member outer end 14 set screw 15 bifurcated piece 15 'pin 16 set screw 17, 18 screw Hole 19 Spring strip 19a Spring strip base end 19b Spring strip distal end 20 Protrusion 21 Base 22 Center line 23 Displacement conversion means 24, 25 Strain gauge 24a, 25a Support member 26 Track 27 Support member 28 Roadbed 29 Sleeper 30 Ballast R Relay rod R ′ One end R ″ of relay rod The other end A, B of the relay rod Fixed point

Claims (2)

The outer end portion is composed of a fixing portion and a sensing portion each having connecting means that can be connected to the relay rod with a phase shift of 90 degrees in the circumferential direction. The sensing portion pivots on the fixing portion. A spring band plate that can be supported in the pivoting direction of the cylindrical body, and means for converting the rotation angle of the cylindrical body sensed by the spring band plate into a displacement amount; A link-type displacement meter characterized by comprising:   The spring band plate has a base end portion fixed to the inner end portion of the fixing portion and a distal end portion formed on the inner end portion of the core member that is fitted to the outer end portion of the cylindrical body. 2. The link type displacement meter according to claim 1, wherein the link type displacement meter is in contact with each other through a protrusion so as to warp in a state of exceeding the line.

Images