JPS62108183A - Device for fixing seismometer in bored vertical hole - Google Patents

Abstract

PURPOSE:To observe an earthquake in a short time through simple operations, by providing plural pieces of seismometers under a connected condition by using a connecting member in a vertical hole. CONSTITUTION:Plural seismometers 1 are connected at intervals by using a connecting member 3. The connected seismometers 1 are then lowered in a vertical hole which is previously bored to a prescribed depth. When the seismometers 1 reach prescribed depths, electromagnetic coils of fixed magnets 5 and movable magnets 6 are conducted from the ground surface by means of an electric signal. When the electromagnetic coils are conducted, the magnets 5 and 6 repel each other and grippers 2, 2... which are connected with the magnets 6 and provided above and below each seismometer 1 are pushed by its supporting section and opened. Then the grippers 2, 2... are pressed against the side wall of the vertical hole and fix the seismometers 1. Moreover, when it is required to take out the seismometers 1 by releasing the seismometers 1 from their fixed conditions, the opposite electric current is supplied to the magnets 5 and 6. Then both magnets 5 and 6 attract each other and grippers 2, 2... connected with the end section of the magnets 6 are pulled up and closed. Therefore, the seismometers 1 can be taken out from the vertical hole.

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of industrial application> The present invention relates to a seismometer fixing device for arranging an underground seismometer in a bored hole.

<Prior art> As shown in Fig. 6, conventional techniques for installing underground seismometers in the ground include drilling holes at different depths for embedding seismometers A, B, C, etc.; Drill holes D', D', etc. in several places and drill these holes.

One seismometer was lowered and fixed at D' and D'.

<Problems to be solved by the invention> In these conventional conventional 3A installations, if a fault occurs in the buried seismometer, it can be pulled out and repaired via a wire that has been attached in advance. In these devices, the depth of embedding the seismometers is becoming deeper and deeper, and the number of observation points is also increasing. It cannot adequately cope with recent underground seismic observations. That is, with these conventional devices, the number of borings required increases, and the cost of boring required to bury the seismometer increases, making it uneconomical. Therefore, the present invention aims to provide an easy-to-operate and economical seismometer fixing device that uses a large number of ground B31 by one boring and allows each seismometer to detect an earthquake tIAal11 at a predetermined depth.

<Means for solving the problem> In view of the above-mentioned circumstances, the present invention is an invention aimed at solving this problem. land ff1i+
and a fixed gripper installed at each earthquake M1 to lower these seismometers into the bored hole and place them at a predetermined depth, and each gripper is fixed to the side wall of the hole by an electric signal from the ground inside. The seismometer fixing device for boring holes has a fixed magnetometer 1- and a movable magnet 1- built into each seismometer so as to be able to release the seismometer. Here, the fixed magnetometer 1- built in the seismometer and the movable magnet repel or attract each other using electrical signals from the ground, thereby fixing or releasing the seismometer to the side wall of the hole.

<Example> Next, an example of a seismometer fixing device for boring hole adjustment according to the present invention will be described based on the drawings.

Reference numeral 1 designates a seismograph, and a plurality of fixing grippers 2, 2, etc. are provided on the upper and lower sides of the seismometer, and one end thereof is pivotably supported to open and close the seismometer, and the seismometer is opened and closed by an opening and closing means described later.

A plurality of seismometers 1 are connected at predetermined intervals by connecting members 3 using wire cables or the like, and the seismometers are lowered into a hole 4 that has been previously bored to a predetermined depth and placed at a predetermined depth. The grippers 2, 2, .

Opening/closing means corresponding to the grippers 2, 2, etc. are provided above and below the seismograph 1, and these opening/closing means consist of a fixed magnet 5 and a movable magnet 6, both of which are excited by electrical signals from the ground. The fixed magnets 5 are provided on the partition plates 8 above and below the seismograph 1, and the movable magnets 6 are made to correspond to the fixed magnets 5, and the grippers 2, 2, . . .
The ends are movably connected to enable pushing and pulling.

In addition, the side of the movable magnet 6 connected to the grippers 2, 2, etc. is formed into a conical shape, and when the movable magnet 6 is repelled by the fixed magnet 5, the slope (conical surface) of the movable magnet 6 connects the grippers 2, 2, etc.
I'm trying to suppress... The gripper 2.2... is formed into a slope 2a on the connecting side of the movable magnet 6, and when pushed out by the movable magnet 6, the hole alignment 4 is ensured on both slopes.
It is causing oppression to take place. Note that 7 is a guide provided on the connecting member 3 and is placed above and below the seismometer 1 to align the hole 4.
It is used to guide the robot when it is lowered into the interior and when it is pulled out, and forms an inclined portion 7a in both directions of movement.

<Function> As is clear from the above configuration, the present invention provides a seismometer in which a plurality of seismometers 1 are connected by connecting members 3 at intervals,
The seismometers 1 are lowered into the hole 4 that has been bored to a predetermined depth, and when the seismometers 1 reach the predetermined depth, the grippers 2, 2, etc. installed above and below each seismometer 1 are moved by electric signals from the ground. When the electromagnetic coils of the fixed magnet 5 and the movable magnet 6 are energized, the fixed magnet 5 and the movable magnet 6 repel, and this repulsive force causes the gripper 2 to connect with the movable magnet 6.
．． 2... are pushed open centering on the pivot, and the gripper is pressed against the side wall of the hole adjustment 4 to fix and install the seismometer 1.

When the seismograph 1 is unfixed and withdrawn, a current opposite to that described above is applied to the fixed magnet 5 and the movable magnet 6, so that the fixed magnet 5 and the movable magnet 6 attract each other and the movable magnets 1-6 The grippers 2, 2, . . . connected to the ends of are pulled by the movable magnet 6 and closed. As a result, the seismometer becomes free during the hole preparation and can be pulled out from the hole preparation 4.

<Effects of the Invention> With the above-described configuration, the present invention allows a plurality of seismometers connected at a predetermined interval using connecting members to be lowered into a prepared hole bored to a predetermined depth and placed at a predetermined depth. Using a fixed magnet with a built-in fixing gripper and a movable magnet provided on each seismograph, it is possible to fix it to the side wall of the hole and release it by energizing it with an electric signal from the ground. Therefore, in the present invention, since a plurality of seismometers can be installed in one hole by connecting them with continuous members,
Unlike traditional seismometer installation, there is no need to bore holes in multiple locations, and earthquakes can be observed in a relatively short period of time, and installation is simple.

In addition, the seismometer installed in the hole preparation can be fixed and fixed against the side wall of the hole by opening and closing the gripper using one opening/closing means of a fixed magnet and a movable magnet based on signals from the ground, and can be released and pulled out. It has unprecedented effects such as easy repair in the event of a breakdown.

[Brief explanation of drawings]

The drawings show an embodiment of the seismometer fixing device for boring hole adjustment according to the present invention, and FIG. 1 is a vertical sectional view of the device fixed, FIG. 2 is a partially enlarged view of FIG. 1, and FIG. 3 is a partially enlarged view of FIG. 4 are enlarged views showing part of the gripper and opening/closing means of the seismograph, FIG. 3 shows the seismometer in a fixed state to the hole adjustment, and FIG. 4 shows the seismometer when it is released. FIG. 5 is a cross-sectional plan view taken along line X--X in FIG. 4, and FIG. 6 is a vertical cross-sectional view of a conventional seismometer buried in the ground. 1. Seismometer, 2. Gripper, 2a. Slope. 3. Connection member, 4. Hole adjustment, 5. Fixed magnet,
6... Movable magnet 1-17... Guide, 7a... Inclined part, 8... Partition plate. Fig. 3 Fig. 4 1 Ith earthquake work 1 2 Gripper 2 m Slope 3 ・ ・ Connecting member 4 ・ ・ Hole adjustment 5 ・ Fixed magneno amount 61.1 movement, 1.4 7 ・ Guide 7a - tilting part
Cutting diagram of 4o-1 Fig. 2 Fig. 6 [. 】 吋′】

Claims (1)

[Claims] A plurality of seismometers connected at predetermined intervals using connecting members, a fixing gripper provided on each seismometer in order to place these seismometers at a predetermined depth in a boring hole, and each gripper. A seismometer fixing device for boring hole adjustment, characterized in that each seismometer has a built-in fixed magnet and a movable magnet so that the seismometer can be fixed to the side wall of the shaft by an electric signal from the ground and can be released.