JP2973189B2 - Mounting structure of displacement sensor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a displacement sensor, and more particularly to fatigue of a structural material constituting a structure such as a bridge, a steel tower, other buildings, and a mechanical structure such as a construction machine. Material rupture, earthquake, typhoon,
The present invention relates to a mounting structure of a displacement sensor for detecting a displacement of a structural material and other abnormalities at the time of an abnormal situation in which a flood or other large external force may act.

[0002]

2. Description of the Related Art In general, structures are designed and constructed with a predetermined strength and stability or safety. It is required to be detected. For example, taking a bridge as an example, it is indispensable to avoid derailment of a train due to the above-mentioned earthquake and other abnormalities, and to confirm a state in which a vehicle cannot travel. A typical bridge is, for example, I
The main girder is constructed by combining a plurality of structural members made of shaped steel or the like in parallel or in series, and derails when the deviation or relative deviation of each I-shaped steel from the reference position exceeds a predetermined displacement value. Due to the danger, it is necessary to detect the displacement at the time of the abnormality and issue an alarm.

[0003] A conventional mounting structure of a displacement sensor will be briefly described with reference to FIG. FIG. 4 is a perspective view of a main part of a main girder 2 of a general bridge 1 (structure). The main girder 2 is made of I-beam (structural material). A web plate 3 (belly plate) extending planarly in the bridge axis direction, an upper flange 4 and a lower flange 5 fixed above and below the web plate 3, and a side surface of the web plate 3 between the upper flange 4 and the lower flange 5. And a fixed stiffener 6. A concrete floor slab 7 and the like are laid on the main girder 2.

The lower flange 5 of the main girder 2 is supported by a support member 8 and a sole plate 9.

As an attachment structure 11 for the displacement sensor 10, one end 12 of the displacement sensor 10 is attached to the stiffener 6,
The other end 13 is fixed to a part of the support member 8. As the configuration of the displacement sensor 10, for example, carbon fibers are arranged in parallel and at equal intervals, and the number of carbon fibers in proportion to the magnitude of the deformation due to the external force applied to the displacement sensor 10 is broken, so that the displacement of the displacement sensor 10 is reduced. Although a configuration capable of detecting and storing the amount of occurrence and its displacement can be used, any other element capable of detecting the displacement can be adopted.

In the mounting structure 11 of the displacement sensor 10 having such a configuration, the displacement of the main beam 2 in a predetermined direction from the support member 8 or the sole plate 9 causes the displacement sensor 10 to detect the displacement (and the amount of displacement). is there. However, in the mounting structure 11 of the displacement sensor 10, it is necessary to attach the displacement sensor 10 to each of the plurality of main girders 2 arranged in the bridge 1, and there is a problem that the cost is increased.

[0007] From the viewpoint of avoiding derailment of a train or the like passing over the bridge 1 or of preventing the vehicle from running, the relative displacement of the plurality of main girders 2 is determined at a predetermined position (" If the threshold value is not exceeded, normal safe traffic can be ensured. Therefore, the mounting structure 11 of the displacement sensor 10 in which the displacement sensors 10 are attached to all the main girders 2 to detect the absolute displacement is provided. It is considered that it is sufficient to detect the relative displacement of each structural material because of the overloaded quality.

FIG. 5 is a side view of another mounting structure 14 of the displacement sensor 10. In the mounting structure 14 of the displacement sensor 10, a plastic material or the like is intersected between the main beams 2 adjacent to each other. And a displacement sensor 10 is attached to the support 15.

Although the relative displacement between the main girders 2 can be detected in the mounting structure 14 of the displacement sensor 10 having such a configuration, the mounting structure 1 of the displacement sensor 10 shown in FIG.
As in the case of 1, it is necessary to attach the displacement sensor 10 to each main girder 2, and it is still difficult to reduce the cost.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and can ensure the safety of a bridge or other structure composed of a plurality of structural materials and can detect a displacement in an abnormal state. It is an object to provide a mounting structure for a displacement sensor.

Another object of the present invention is to provide a displacement sensor mounting structure capable of detecting a relative displacement (displacement) of a plurality of structural members with a simple structure.

Another object of the present invention is to provide a displacement sensor mounting structure capable of detecting a safety limit without mounting the displacement sensor on all of the plurality of structural members.

Another object of the present invention is to provide a mounting structure of a displacement sensor capable of equipping a plurality of structural members with a displacement sensor at low cost.

Another object of the present invention is to provide a displacement sensor mounting structure capable of reliably detecting the relative displacement of each structural material even if the number of the displacement sensors is smaller than the number of the plurality of structural materials. As an issue.

[0015]

That is, according to the present invention, a wire such as a wire is connected to a displacement sensor and the wire is stretched over a plurality of structural materials, and the wire is stretched within a predetermined range. Focusing on passing,
A mounting structure for a displacement sensor capable of detecting a displacement of a structural member comprising at least a first structural member and a second structural member, wherein the displacement sensor straddles the first and second structural members and has a predetermined range. The displacement sensor is attached to a wire rod stretched over the length of the wire.

One fixed end of the wire can be fixed to the first structural member, and the other fixed end can be fixed to the second structural member.

The wire can be stretched in a direction in which the first structural material and the second structural material may be displaced.

The wire can extend at least in the vertical and horizontal directions across the first and second structural members.

The wire extends over at least the first direction and the second direction over the first and second structural members, and changes direction in the first direction and the second direction. The guide member which can guide the said wire in each direction can be arrange | positioned at a part.

The wire extends over the first and second structural members in at least a first direction and a second direction, and defines respective detection areas along the respective directions. Can be possible.

The wire can be a wire or any other material.

In the displacement sensor mounting structure according to the present invention, a wire such as a wire is connected to a single displacement sensor, and the wire is spread over a plurality of structural members such as I-shaped steel and over a predetermined range. If a displacement occurs in any part of the stretched wire, the change in tension due to this displacement can be transmitted to the displacement sensor.Therefore, this wire is stretched within a predetermined range. A relative displacement at an arbitrary part can be detected. That is, since the predetermined range extends over at least a plurality of structural materials of the first structural material and the second structural material, if one of these structural materials is displaced relative to the other, This displacement is immediately transmitted to the displacement sensor via the wire, and the displacement sensor can detect the displacement at the same time as its occurrence. Moreover,
Regardless of which part of the structural material is displaced, the same displacement can be detected by a single displacement sensor.

Therefore, if the displacement does not exceed a predetermined "threshold" in the structural material such as the bridge, the train is not derailed, and if it is exceeded, a warning can be issued that there is a possibility of derailment.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a mounting structure of a displacement sensor according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1 shows a displacement sensor 10 according to the present invention.
FIG. 2 is a side view of a structure (bridge 1) employing the mounting structure 20 of FIG. 1, and in the mounting structure 20 of the displacement sensor 10, a wire 21 (wire) connected to the displacement sensor 10.
Is straddled over a first structural material (for example, main girder 2A on the left side in the figure) and a second structural material (for example, main girder 2B on the right side in the figure), and is stretched over a predetermined range. The range where the wire 21 is stretched includes the main girder 2A and the main girder 2.
It is desirable to extend over the entirety of the web plate 3 in the load direction, that is, the width direction (vertical direction in the drawing) of each of the web plates B.

The wire 21 has one fixed end 22 connected to the first mounting pin 23 of the web plate 3 of the main girder 2A.
The other fixed end 24 is connected to the second of the web plate 3 of the main girder 2B.
, And the displacement sensor 10 is connected to the second mounting pin 25 side of the main girder 2B.

The wires 21 extend from the first mounting pin 23 in the vertical direction along the web plate 3 of the main girder 2A, in the horizontal direction between the main girder 2A and the main girder 2B, and on the web plate 3 of the main girder 2B. Along the vertical direction along the way to the second mounting pin 25. Further, each direction conversion unit (first
The first direction changing unit 26 and the second direction changing unit 27)
Guide roller 28 (guide member) and second guide roller 29 (guide member) are connected to main girder 2A and main girder 2.
The wire 21 is attached to the first guide roller 28 and the second guide roller 29 with a predetermined tension according to the displacement sensor 10.

Therefore, the first detection area 30 in the vertical direction from the first mounting pin 23 to the first guide roller 28 and the first detection area 30 in the horizontal direction from the first guide roller 28 to the second guide roller 29 And a third detection region 32 in the vertical direction from the second guide roller 29 to the second mounting pin 25.
And can be defined.

In the mounting structure 20 of the displacement sensor 10 having such a configuration, when an external force acts on the bridge 1 and a displacement occurs in any part of the main girder 2 at the time of an earthquake or other abnormality, a single displacement sensor is used. This can be detected by 10 and the wire 21. That is, the first detection area 3
0, breakage of the main girder 2A or main girder 2B or displacement from the support member 8, and further breakage or displacement of the concrete floor slab 7 occurred in any of the second detection region 31 and the third detection region 32. In such a case, since the wires 21 are stretched in these areas, the displacement can be transmitted to the displacement sensor 10 immediately, and the displacement sensor 10 can output a detection signal corresponding to the displacement. In addition, the displacement occurrence site is the first detection region 30, the second detection region 30,
In either the detection area 31 or the third detection area 32, the same displacement amount is detected.

If the magnitude of the relative displacement between the main girders 2A and 2B due to the detection signal exceeds a predetermined "threshold", it is necessary to stop the train or other traffic.
However, in the case where the threshold value is not reached, it is only necessary to maintain the alert state as a displacement that can avoid derailment or the like at least, and a reinforcing structure that can avoid derailment should be established in the bridge 1. As a result, the bridge 1 can be maintained and managed more easily and economically as compared with the conventional bridge 1.

In the present invention, the wires 21 and other wires are stretched along a direction in which the first structural member (main girder 2A) and the second structural member (main girder 2B) may be displaced. I just need to pass it. For example, FIG. 2 is a side view of a structure (bridge 1) employing the mounting structure 40 of the displacement sensor 10 according to the second embodiment of the present invention. 21 is stretched all around.

That is, as shown in the figure, a third guide roller 42 (guide member) is provided on the stiffener 6 of the main girder 2B in the third direction changing portion 41 in the lower part of the main girder 2B, and Fourth direction changing unit 43 in lower part
The fourth guide roller 4 on the stiffener 6 of the main girder 2A.
4 (guide member) to provide the first direction changing portion 26
The wire 21 is stretched in a rectangular shape together with the first guide roller 28 and the second guide roller 29 in the second direction changing section 27. Accordingly, in addition to the first detection area 30, the second detection area 31, and the third detection area 32, a fourth detection area 45 is provided between the third guide roller 43 and the fourth guide roller 44. Can be defined.

In the mounting structure 40 of the displacement sensor 10 having such a configuration, similarly to the mounting structure 20 of the displacement sensor 10 shown in FIG. 1, the first detection area 30, the second detection area 31, and the third detection area are provided. 32 can be detected by the displacement sensor 10 and the main girder 2
The displacement can be detected by the displacement sensor 10 also for the relative displacement in the lower part of A and the main girder 2B (also for the fourth detection area 45).

Of course, in the present invention, the wires 21 and other wires may be stretched along the direction in which the structural material may be displaced.
It is also possible to stretch the wire 21 so that the 0, the second detection region 31, the third detection region 32, the fourth detection region 45 and the like make an arbitrary angle. Further, by selecting a pattern for extending the wire and controlling the degree of detection of the displacement in accordance with the pattern, it is possible to detect at which part the displacement has occurred.

Further, according to the present invention, the wire 21 can be stretched in units of at least the first structural material and the second structural material.
You may stretch one. That is, FIG. 3 is a side view of a structure (bridge 1A) employing the mounting structure 50 of the displacement sensor 10 according to the third embodiment of the present invention. 2A
And more main girders 2C (third structural material), main girders 2D (fourth structural material) and main girders 2E in addition to the main girder 2B.
The wire 21 is stretched over the main girder 2A, the main girder 2B, the main girder 2C, the main girder 2D and the main girder 2E of the bridge 1A having the (fifth structural material), and a part thereof (the main girder 2E side). Is provided with a displacement sensor 10.

Specifically, the wire 21 starts from the first mounting pin 23 of the main girder 2A, and the first guide roller 28 of the first direction changing section 26 and the second guide pin 28 of the second direction changing section 27. 2 guide roller 29, the main girder 2B
The lower surface of the web plate 3 on the left side of FIG. 3 is lowered to pass through the third guide roller 42 of the third direction changing portion 41 and the first communication hole 51 formed through the web plate 3 to form the web. It reaches the right side of the plate 3, rises the fourth guide roller 53 in the fourth direction changing part 52, and further rises the right side of the web plate 3 in the drawing, and the fifth direction changing part 5
4 to the fifth guide roller 55. In the same manner, the displacement reaches the displacement sensor 10 and the second mounting pin 25 of the main girder 2E, so that the description of the intermediate portion will be omitted. Therefore, the wire 21 starts from the first detection region 30 in the vertical direction of the main girder 2A, and then moves to the second detection region 31, the third detection region 32, and the first detection region 32.
The fourth detection area 56 including the communication hole 51, and the similar detection areas in the horizontal direction and the vertical direction are covered, and the last detection area 57 on the left surface of the main girder 2E is covered.
(The description of the intermediate part is omitted).

In the mounting structure 50 of the displacement sensor 10 having such a configuration, the wires 21 cover all the detection areas in the vertical direction of each main girder 2 including the first detection area 30 and in the horizontal direction between each other. When a break or displacement occurs in any of these, the displacement can be transmitted to the displacement sensor 10 through the wire 21, and the detection of the five main girders 2 by the single displacement sensor 10. The area can be covered.

In the present invention, when the structural members (main girders 2) as shown in the respective drawings (FIGS. 1, 2 and 3) are arranged in parallel, these structural members are arranged in series. In this case, the displacement or breakage along the length direction can be detected.

[0038]

As described above, according to the present invention, a wire material such as a wire and a displacement sensor are connected and combined to cover a predetermined range of a structural material such as a main girder. The displacement of a plurality of structural members can be detected by a single displacement sensor, and a necessary detection mechanism can be constructed at low cost.

[Brief description of the drawings]

FIG. 1 is a side view of a structure (bridge 1) employing a mounting structure 20 of a displacement sensor 10 according to a first embodiment of the present invention.

FIG. 2 is a side view of a structure (bridge 1) employing a mounting structure 40 of a displacement sensor 10 according to a second embodiment of the present invention.

FIG. 3 is a side view of a structure (bridge 1A) employing a mounting structure 50 for a displacement sensor 10 according to a third embodiment of the present invention.

FIG. 4 is a perspective view of a main part of a main girder 2 in a conventional general bridge 1 (structure).

FIG. 5 shows another conventional mounting structure 1 of the displacement sensor 10.
4 is a side view of FIG.

[Explanation of symbols]

Reference Signs List 1 bridge (structure) 1A bridge (structure) 2 main girder (I-beam, structural material) 2A main girder (first structural material) 2B main girder (second structural material) 2C main girder (third 2D main girder (fourth structural material) 2E main girder (fifth structural material) 3 I-section steel web plate (abdominal plate) 4 I-section steel upper flange 5 I-section steel lower flange 6 Supplement Rigid material 7 Concrete floor slab 8 Bearing member 9 Sole plate 10 Displacement sensor 11 Mounting structure of displacement sensor 10 (FIG. 4) 12 One end of displacement sensor 10 13 The other end of displacement sensor 10 14 Other of displacement sensor 10 Mounting structure (FIG. 5) 15 support member made of plastic material or the like 20 mounting structure of the displacement sensor 10 (first embodiment, FIG. 1) 21 wire (wire material) 22 one fixed end of the wire 21 23 first mounting Pin 24 Wy 21 other fixed end 25 second mounting pin 26 first direction changing part 27 second direction changing part 28 first guide roller (guide member) 29 second guide roller (guide member) 30 first Detection area 31 Second detection area 32 Third detection area 40 Mounting structure of displacement sensor 10 (second embodiment, FIG. 2) 41 Third direction changing unit 42 Third guide roller (guide member) 43 Fourth direction changing part 44 Fourth guide roller (guide member) 45 Fourth detection area 50 Mounting structure for displacement sensor 10 (third embodiment, FIG. 3) 51 First communication hole 52 Fourth Direction changing part 53 Fourth guide roller (guide member) 54 Fifth direction changing part 55 Fifth guide roller (guide member) 56 Fourth detection area 57 Last detection area

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) G01B 21/00-21/32 E04G 21/18

Claims (7)

(57) [Claims] 1. A mounting structure for a displacement sensor capable of detecting a displacement of a structural member composed of at least a first structural member and a second structural member, wherein the first and second structural members are attached to each other. A displacement sensor mounting structure, wherein the displacement sensor is connected to a wire stretched over the predetermined range. 2. The displacement sensor according to claim 1, wherein one fixed end of the wire is fixed to the first structural member, and the other fixed end is fixed to the second structural member. Mounting structure. 3. The displacement sensor according to claim 1, wherein the wire is stretched along a direction in which the first structural member and the second structural member may be displaced. Mounting structure. 4. The displacement sensor mounting structure according to claim 1, wherein the wire is stretched at least vertically and horizontally across the first and second structural members. 5. The wire rod extends in at least a first direction and a second direction over the first and second structural members, and extends in the first direction and the second direction. 2. The displacement sensor mounting structure according to claim 1, wherein guide members capable of guiding the wire in each direction are arranged in the direction conversion unit. 6. The wire extends over the first and second structural members in at least a first direction and a second direction, and has a detection region along each of these directions. 2. The mounting structure for a displacement sensor according to claim 1, wherein the distance can be defined. 7. The displacement sensor mounting structure according to claim 1, wherein the wire is a wire.