JP2001013258A - Horizontal displacement-recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an inexpensive horizontal displacement-recording device with a simple configuration that can record the rocking of a building due to an earthquake or the like, and the building for easily acquiring information on an input earthquake movement and information on the response property of a building for the input earthquake movement. SOLUTION: A horizontal displacement-recording device 1 records the rocking of a building, and is provided with a rocking body 2 that is rocked and displaced when the building is rocked, a recording plate 3 where the displacement of the rocking body 2 is recorded, and a writing means 4 that is provided in the rocking body 2 and writes the displacement of the rocking body 2 to the recording plate 3. In the building, at least one horizontal displacement-recording device 1 is installed on the foundation, and at least another horizontal displacement-recording device 1 is installed at the back of a hut on the first floor or on a second floor or higher.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal displacement recording device, and more particularly, to a simple and inexpensive horizontal displacement recording device capable of recording the displacement of a building during an earthquake or the like, and information on the input seismic motion. Provided is a building capable of easily acquiring information on a response property of a building to an input earthquake motion.

[0002]

2. Description of the Related Art In order to develop and supply buildings with higher seismic performance,
It is important to investigate and analyze the response of buildings to actual ground motions and use the analysis results.

However, it is difficult to predict the location and time of occurrence of an earthquake, and even in the case of the Hyogoken-Nanbu Earthquake, earthquake ground motions occur in limited places such as some administrative facilities and public buildings. Was just recorded. That is, in order to investigate and analyze the response of buildings to earthquake ground motion, it is necessary to accumulate information on many buildings, but seismometers and the like for recording that information have complicated mechanisms and electric circuits. In reality, they cannot be installed in many buildings, especially houses.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a simple and inexpensive horizontal displacement recording device capable of recording the displacement of a building at the time of an earthquake or the like, and an input device. An object of the present invention is to provide a building capable of easily acquiring information on earthquake motion and information on a response property of the building to the input earthquake motion.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a horizontal displacement recording apparatus for recording a swing of a building, wherein the swing body which swings and displaces when the building swings, and the displacement of the swing body is recorded. A horizontal displacement recording apparatus, comprising: a recording plate to be recorded; and writing means provided on the oscillating body and writing displacement of the oscillating body on the recording plate. Is achieved.

[0006] Further, the present invention is characterized in that a plurality of the horizontal displacement recording devices are installed in the inside, at least one of the horizontal displacement recording devices is installed on a foundation, and at least one of the other horizontal displacement recording devices is one. The object has been achieved by providing a building installed on the back of a floor or on the second floor or higher.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings. here,
FIG. 1 is a perspective view showing the horizontal displacement recording device of the present embodiment, and FIG. 2 is a longitudinal sectional view of the horizontal displacement recording device of FIG.

[0008] The horizontal displacement recording apparatus 1 of the present embodiment (hereinafter, referred to as
It may be simply referred to as “device 1”. ) Is a device that records the swing of the building during an earthquake, as shown in FIGS. 1 and 2, an oscillator 2 that swings and displaces when the building swings.
A recording plate 3 on which the displacement of the oscillator 2 is recorded;
And writing means 4 for writing the displacement of the oscillating body 2 on the recording plate 3. The device 1 is fixed on an installation base G such as a foundation or a structural material in a building.

The oscillating body 2 is arranged so as to extend in the vertical direction, and comprises a flexible shaft portion 21 and a oscillating portion 22 fixed on the upper portion of the shaft portion 21. The shaft portion 21 is composed of two flexible rods 21a and 21b and both rods 21a and 21b.
1b and a connecting nut 21c.
1 supports the oscillating portion 22 from below so that the oscillating portion 22 can be displaced substantially horizontally in any direction of 360 °.
The two rods 21a and 21b are round rods having a circular cross section and having external thread portions at both ends.

The shaft portion 21 has a male screw portion (not shown) for fixing the swinging portion 22 at the upper end, and the lower end portion of the shaft portion 21
It is screwed to the fixing plate 51 and is fixed on the bottom surface of the protective case 5 via the plate 51. The shaft 21 is
The length of the rod 21a and / or the rod 21b can be adjusted by increasing or decreasing the depth at which the rod 21a is inserted into the nut 21c.

The swinging portion 22 is formed of a cylindrical body having a predetermined weight, and is screwed and fixed to an upper end portion of the shaft portion 21 through a connecting hole (not shown) formed in the center of the lower surface. . The swing portion 22 is provided so as to be able to swing with the swing of the installation base G. In the apparatus 1, the swinging part 22 can be removed from the shaft part 21 and only the swinging part 22 can be replaced with a different weight.
1 can be removed from the swinging portion 21 and the fixing plate 51, and only the shaft portion 21 can be replaced with one having a different length, diameter and material.

The oscillating body 2 is housed in a protective case 5 so as not to be destroyed by a fallen object during an earthquake.
The protective case 5 has a rectangular bottom surface portion 5 in which the fixing plate 51 is fixed in contact with the upper surface and is fixed to the ground on the ground base G.
2, a side wall portion 53 rising from three sides of the bottom portion 52 and having a U-shaped cross section, an upper horizontal plate portion 56, and a door portion 54 attached to the side wall portion 53 via a hinge.

The recording plate 3 is made of a synthetic resin plate having a predetermined thickness and a rectangular shape in plan view. The recording plate 3 includes a protective case 5
Is removably fixed to an upper portion of the oscillating member, and is disposed above the swing portion 22. Specifically, a pair of guide grooves 55, 55 are formed on the upper part of the protective case 5 so as to face each other.
As shown in FIG. 1, the door 54 is opened, and the recording plate 3 is
A pair of opposing side edges of the recording plate 3 are
55, it is mounted on the upper part of the protective case 5 and then the door 5 is closed, so that the recording plate 3
Can be immovably fixed. Conversely, the recording plate 3 may be removed by opening the lid 5 and pulling out the recording plate 3. In FIG. 1, the illustration of the upper horizontal plate portion 56 is omitted.

The recording plate 3 has, on one surface thereof, a recording surface 31 on which the displacement of the oscillator 2 is recorded. The recording surface 31
It is formed into a concave curved surface having an arcuate vertical cross section, and its radius of curvature is substantially equal to the length from the lower end of the oscillator 2 to the upper end of the writing means 4.

The recording plate 3 has a scale on the recording surface 31 for reading displacement. Specifically, as shown in FIG. 5, two straight lines (grid lines) 32, 32 orthogonal to each other at the center point of the recording surface 31, and a plurality of concentric circles 33 centered on the center point are shown. Have been. The diameter of each concentric circle 33 corresponds to a plurality of inclination angles of the oscillator 2.
In this device 1, since the recording plate 3 has the reading scale, the history or recording of the displacement recorded on the recording surface 31 can be easily and accurately read.

The writing means 4 is provided at the center of the upper part of the swing part 22. The writing unit 4 includes a writing member 41 that contacts the recording plate 3 and an urging unit 42 that constantly urges the writing member 41 in the direction of the recording plate 3. The trajectory of the displacement of the oscillating body 2 is continuously and directly written on the recording plate 3. Writing member 41
Has a sharp conical tip, which is used to write the displacement of the oscillator 2 on the recording plate 3 by scratching the surface of the recording plate 3. The urging means 42 includes a cylindrical body fixed to the swinging part 22 and having the writing member 41 inserted therein so as to be vertically movable, and a coil spring housed inside the cylindrical body.

The device 1 of the present embodiment is installed on a base (installation base) that can stably fix the present device, such as a foundation or a structural material in a building. When installing this apparatus, the recording surface 31
It is preferable that one of the two straight lines 32, 32 for displacement reading is aligned with the girder direction of the building and the other is aligned with the direction orthogonal to the girder direction.

FIG. 3 is a diagram schematically showing a state in which seismic motion is input to a building 10 in which a plurality of horizontal displacement recording devices of FIG. 1 are installed. The building 10 is a three-story wooden house,
A plurality of devices 1 having the above configuration are installed inside. That is,
One device 1A is installed on a foundation (soil concrete) 11, and three devices 1B, 1C, and 1D are installed on the second floor, the third floor, and the beam behind the shed in order. I have. When an earthquake occurs in the area where the building 10 is located, as shown in FIG. 4, the rocking body 2 in each device rocks according to the direction and strength of the rocking of the building due to the earthquake. The trajectory is recorded on the recording plate 3 by the writing means 4. Then, after the earthquake, the recording plate is taken out from each of the devices 1A to 1D, and the trajectory of the rocking motion of the rocker recorded on each recording plate is analyzed. You can know the properties. That is, from the information of the devices 1A to 1D, it is possible to know the direction and intensity of the seismic motion input to the building 10, the direction and amount of displacement generated in each part of the building 10, and the like.

The horizontal displacement recording apparatus 1 of the present embodiment can accurately record the history of the swing of a building during an earthquake. Further, the configuration is simple as described above, and the manufacturing cost is low. Further, installation in a building is only required to be fixed with screws or nails as shown in FIG. 2, and installation is easy. That is, the present device 1 can be widely installed in a building, and is extremely useful in widely collecting information on the shaking of the building.

Further, since the shaking is mechanically recorded, there is no possibility that a problem such as a failure of operation during an earthquake due to a power failure or running out of a battery may occur. Further, since the length of the shaft portion 22 is adjustable, fine adjustment to a predetermined cycle can be performed. Further, since the writing means 4 having the urging means 42 is provided, the contact of the writing member 41 with the recording plate 3 is not interrupted when the rocking body 2 is displaced.

<Test Example> The horizontal displacement recording device 1 shown in FIGS. 1 and 2 was fixed on a simulated seismic motion generator, and the simulated seismic motion generator was operated for a predetermined time. Recording plate 3 from device 1
And the history of displacement of the oscillator 2 was read. The results are shown in FIG. As shown in FIG. 5, according to the present apparatus, the trajectory or history of the displacement of the oscillator from the time of the occurrence of the earthquake to the end of the earthquake is continuously and accurately recorded on the recording plate. The dimensions, materials, etc. of each part in the apparatus 1 used for the test are as follows. Shaft part 21; 4 mm diameter aluminum swinging part 22; diameter 53 mm, thickness 45 mm, weight 785
g from the lower end of the iron shaft portion 21 to the center of gravity of the swing portion 22 (see FIG. 2).
305mm Oscillator 2 natural period; 0.337 seconds

The embodiment of the horizontal displacement recording apparatus according to the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and the configurations, shapes, dimensions, and the like of each unit and each unit are not limited to those of the present invention. Changes can be made as appropriate without departing from the spirit of the invention.

For example, the swing part 22 of the swing body 2 is
1 is composed of a base fixed at a predetermined position and a plurality of annular bodies detachably stacked on the base, and the weight of the oscillating part 22 is adjusted by increasing or decreasing the number of stacked annular bodies. It may be configured to obtain. Swing part 2
2, the natural period of the oscillator 2 can be set according to the natural period of the building in which the device is installed, so that the accuracy of the displacement amount data can be improved. preferable.

The writing means 4 is not particularly limited as long as it can write the swing history of the swinging body 2 on the recording plate 3, and may not have the urging means 42. Further, a pencil, a pen, or the like can be used as the writing member 41.
Further, the recording plate 3 is made of various materials (paper,
Metal, etc.) and shapes (flat, etc.). It should be noted that the horizontal displacement recording apparatus 1 of the present invention is not particularly limited in a building to be installed and may be installed in a high-rise building or the like, but is particularly suitable for a small-scale building such as a house. It can also be used to investigate rocking due to causes other than earthquakes.

[0025]

According to the present invention, a simple and inexpensive horizontal displacement recording device capable of accurately recording the swing of a building, information on the input seismic motion, and the response characteristics of the building to the input seismic motion. And a building that can easily obtain information about the building.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a horizontal displacement recording apparatus according to an embodiment.

FIG. 2 is a longitudinal sectional view of the horizontal displacement recording device of FIG.

FIG. 3 is a diagram schematically illustrating a state in which seismic motion is input to an example of a building in which a plurality of horizontal displacement recording devices of FIG. 1 are installed.

FIG. 4 is an explanatory diagram for explaining a function of the horizontal displacement recording device of FIG. 1;

FIG. 5 is a diagram showing an example of a recording surface 31 in the horizontal displacement recording device of FIG. 1 and swing information (earthquake information) of a building recorded on the recording surface 31.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1A-1D Horizontal displacement recording apparatus 2 Oscillator 21 Shaft part 22 Oscillating part 3 Recording plate 4 Writing means 41 Writing member 42 Urging means 10 Building

Claims (7)

[Claims] 1. A horizontal displacement recording device for recording a swing of a building, wherein the swing body swings and displaces when the building swings.
A horizontal displacement recording apparatus, comprising: a recording plate on which the displacement of the oscillating body is recorded; and writing means provided on the oscillating body and writing the displacement of the oscillating body on the recording plate. 2. The oscillating body includes a flexible shaft portion and a oscillating portion fixed to an upper portion of the shaft portion.
2. The horizontal displacement recording apparatus according to claim 1, wherein the writing unit is disposed above the swing unit, and the writing unit is provided in the swing unit. 3. The horizontal displacement recording apparatus according to claim 2, wherein said shaft portion is adjustable in length. 4. The horizontal displacement recording apparatus according to claim 2, wherein the oscillating body has an adjustable weight of the oscillating portion. 5. The writing device according to claim 1, wherein the writing unit includes a writing member that contacts the recording plate, and an urging unit that constantly urges the writing member toward the recording plate. A horizontal displacement recording device according to any one of the above. 6. The horizontal displacement according to claim 1, wherein the oscillating body is accommodated in a protective case, and the recording plate is detachably fixed to an upper portion of the protective case. Recording device. 7. A plurality of the horizontal displacement recording devices according to claim 1, wherein a plurality of the horizontal displacement recording devices are installed inside, at least one of the horizontal displacement recording devices is installed on a foundation, and at least one of the other at least one of the horizontal displacement recording devices is installed. A building where the horizontal displacement recording device is installed on the back of a hut on the first floor or on the second floor or higher.