JP2001133558A - Seismometer fixing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seismometer fixing device capable of securing a space for passing a connector in the inside. SOLUTION: This fixing device for fixing a seismometer in a casing buried in the ground is equipped with a rotating shaft 2 assembled to a holding member 1 substantially parallel to the longitudinal direction of the casing 11, and a fixing member 6 fixed to the inner peripheral surface of the casing interlocking with rotation of the rotating shaft. The rotating shaft is operated to rotate by the drive of a pulse motor 3 assembled in the seismometer for correcting the attitude to fix the seismometer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismometer fixing device for installing a seismometer underground.

[0002]

2. Description of the Related Art When a seismometer is installed underground, the seismometer is placed in a pressure vessel or the like and fixed to a casing provided underground. A conventional seismometer fixing method will be described with reference to FIGS. FIG. 7 is a schematic longitudinal sectional view of a fixing device connected to a seismograph, and FIG. 8 is a top view. When the rotating shaft 42 is rotated by the motor 48, the sliding member 43 linked to the rotating shaft 42 descends,
The moving part 45 of the fixed arm 44 connected to the lower end of the sliding member 43 is pushed down. Since the fixed arm 44 is rotatably fixed to the fixing device 41 at the fulcrum 46, when the moving unit 45 is pressed down, the fixed arm 44 swings around the fulcrum 46, and sandwiches the moving unit 45 and the fulcrum 46. As a result, the fixing portion 47 provided oppositely rises and protrudes outside the fixing device 41. The protruding fixing portion 47 presses against the inner wall of the casing 50,
The fixing device 41 to which the seismometer is connected is fixed in the casing 50. When removing the seismometer, the rotating member 42 is rotated in the opposite direction to the fixed state, the sliding member 43 is raised, and the moving part 45 is pulled up, so that the fixed part 47 is immersed. A plurality of fixed arms 44 are provided around the rotation shaft 42.

[0003]

Various sensors are incorporated in a seismometer installed underground, and the output of each sensor is wired with a connector. However, in the above-described conventional fixing device 41, as shown in FIG. 8, a motor 48 for rotating the rotating shaft 42 is large, and a space is required for the fixed arm 44 to swing. A large hole 49 was not formed, and the connector could not be inserted into the fixing device 41.

[0004] Therefore, an object of the present invention is to provide a seismometer fixing device capable of securing a space for passing a connector therein.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the invention according to claim 1 is a fixing device for fixing a seismometer in a casing buried underground.
(1, 20) holding member (1, 12) substantially parallel to the length direction
And a fixing member (6, 1) which can be fixed to the inner peripheral surface of the casing in conjunction with the rotation of the rotation shaft.
6), and the rotating shaft is rotated by driving a pulse motor (3, 14) for posture correction incorporated in the seismometer.

Here, it is assumed that the holding member is connected to the seismometer.

As described above, according to the first aspect of the present invention, the rotating shaft mounted on the holding member is rotated by using the pulse motor used for correcting the attitude of the seismometer, and is linked to the rotating shaft. By fixing the seismometer on the inner peripheral surface of the casing with a fixed member that moves, there is no need to separately provide a motor for rotating the rotating shaft on the holding member, and it is possible to secure a space for passing the connector through the holding member. .

According to a second aspect of the present invention, there is provided the seismometer fixing apparatus according to the first aspect, wherein the fixing member is provided with an elastic member (for example, compression springs 7, 17) for applying a force in a direction of releasing the fixing. It is characterized.

According to the second aspect of the present invention, the elastic member for applying force in the direction of releasing the fixing is provided on the fixing member, so that the seismometer can be easily removed from the casing. it can.

[0010] The third aspect of the present invention is the first or second aspect.
The seismometer fixing device according to the above, wherein a plurality of fixing members are provided at substantially equal intervals around the rotation axis.

As described above, according to the third aspect of the present invention, by providing a plurality of fixing members around the rotation shaft,
It can be fixed by a plurality of fixing members at the same time, and the fixing force can be increased. Further, the seismometers can be fixed stably by providing them at substantially equal intervals.

According to a fourth aspect of the present invention, there is provided the seismometer fixing device according to the first aspect, wherein the rotating shaft has a threaded portion on a side surface, is screwed to the threaded portion of the rotating shaft, and rotates the rotating shaft. And a movable member having a tapered portion (5) that is movable up and down by the fixed member.

As described above, according to the fourth aspect of the present invention, the movable member having the tapered portion, which is screwed into the screw portion on the side surface of the rotating shaft, moves up and down by the rotation of the rotating shaft. By pushing and moving the contacting fixing member, the seismometer is fixed in the casing. Therefore, the seismometer can be fixed simply by rotating the rotating shaft, and since a large force is not required for rotating the rotating shaft, the seismometer can be easily fixed to the inner peripheral surface of the casing by the pulse motor.

According to a fifth aspect of the present invention, there is provided the seismometer fixing device according to the first aspect, wherein the rotating shaft is integrally rotated with the rotating shaft and includes a cam member (15) with which the fixing member abuts. It is characterized by.

Thus, according to the fifth aspect of the present invention, the cam member provided on the rotating shaft rotates integrally with the rotating shaft, thereby pushing the contacting fixed member and moving the seismometer to the casing. Fix inside. Therefore, the seismometer can be fixed simply by rotating the rotating shaft, and since a large force is not required for rotating the rotating shaft, the seismometer can be easily fixed to the inner peripheral surface of the casing by using a pulse motor. The time until completion of fixing can also be shortened.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a seismometer fixing device according to the present invention will be described below with reference to FIGS.

<First Embodiment> First, FIG. 1 is a longitudinal sectional view of a seismometer fixing device using a movable member having a tapered portion, wherein 1 is a holding member, 2 is a rotating shaft, Is a pulse motor, 4 is a movable member, 5 is a tapered portion, and 6 is a fixed member.

The rotating shaft 2 is mounted substantially parallel to the longitudinal direction of the casing 11 and substantially at the center of the substantially columnar holding member 1. One end of the rotating shaft 2 is rotatably attached to the holding member 1, and the other end is connected to the pulse motor 3, and is rotated by driving the pulse motor 3.
The holding member 1 is connected at one end to the seismometer. The pulse motor 3 is incorporated in the seismometer for correcting the attitude of the seismometer, and the attitude correction mechanism of the seismometer is, for example, not shown, but is fixed to the pulse motor 3 and the pulse motor 3. The rotating shaft, the cam attached to the tip of the rotating shaft, a spring and the like, the posture correcting shaft that is sandwiched and urged between the cam and the spring, by moving the cam, by rotating the cam, The attitude of the speedometer incorporated in the seismometer can be corrected. The pulse motor 3 includes a gear 8, and the torque is increased by using the gear 8 so that the rotating shaft 2 can be sufficiently rotated.

A thread is cut on the side surface of the rotating shaft 2.
The movable member 4 is screwed into the thread, and can be moved up and down by the rotation of the rotating shaft 2. The movable member 4 is provided so as to surround the rotation shaft 2, and has a tapered portion 5 at the tip. The tapered portion 5 is gradually tapered downward, and one end of the fixing member 6 is always in contact with the side surface.

The fixing member 6 is held by the holding member 1 through a hole 9 provided at a right angle to the longitudinal direction of the casing 11 and from the substantially center of the holding member 1 toward the radial direction. It is movable in the direction. One end of the fixed member 6 on the center side of the holding member 1 has a hemispherical shape so as to always contact the tapered portion 5 of the movable member 4. The other end can be pressed against the inner peripheral surface of the casing 11. The three fixing members 6 are provided at equal intervals around the rotation shaft 2 (see FIG. 3). A compression spring (elastic member) 7 is provided around the fixing member 6, and applies a force to the fixing member 6 in a direction in which fixing is released (inward of the holding member 1). The holding member 1 is provided with holes 10 for passing wiring with connectors connected to various sensors incorporated in the seismometer (see FIG. 3).

Next, a method of fixing the seismometer using the seismometer fixing device will be described. First, the holding member 1 provided with the rotating shaft 2, the movable member 4, the fixed member 6, and the like as described above is connected to a seismometer, and the seismometer is inserted to a predetermined position in a casing 11 buried underground. . At this time, as shown in FIG. 1, the movable member 4 has stopped
6 and 6 are in contact with the thinnest portion of the tapered portion 5 and do not protrude from the outer periphery of the holding member 1. Next, the pulse motor 3
To rotate the rotating shaft 2 and move the movable member 4 downward. At this time, the tapered portion 5 in contact with the fixing members 6, 6, 6 becomes gradually thicker, and pushes the fixing members 6, 6, 6 toward the outer periphery of the holding member 1 as shown in FIG. The extruded fixing members 6, 6, 6 are pressed against the inner peripheral surface of the casing 11 as shown in FIG. 3 to fix the seismometer. When removing the seismometer from the casing 11, use the pulse motor 3
As a result, the rotating shaft 2 is rotated in the opposite direction to the case where the rotating shaft 2 is fixed, and the movable member 4 is moved upward. At this time, the movable members 4 are moved upward because the fixed members 6, 6, 6 are constantly pressed inward of the holding member 1 by the compression springs 7, 7, 7 provided around them. When the tapered portion 5 becomes thinner along with the above, the tapered portion 5 gradually sinks into the inside of the holding member 1 and the fixing of the seismometer to the inner peripheral surface of the casing can be released.

As described above, according to the seismometer fixing device of the above embodiment, the fixing members 6, 6, 6 are pushed by the tapered portion 5 of the movable member 4 screwed to the rotating shaft 2, and the fixing members 6, 6,
By fixing the seismometer by pressing the inner peripheral surface of the casing 11 in 6 and 6, the torque is increased by using the gear 8 and the seismometer is fixed by the pulse motor 3 for correcting the posture of the seismometer. It is not necessary to provide a separate motor for fixing the seismometer. Further, unlike the related art, since the fixing member does not swing, the space required for installing the fixing member is reduced. Therefore, the hole 1 for passing the wiring through the holding member 1
Since 0 and 10 can be secured large, the connector can be passed through the holding member 1. In addition, the provision of the compression springs 7, 7, 7 for applying a force in the direction of releasing the fixing around the fixing members 6, 6, 6 allows the seismometer to be quickly removed. By changing the angle of the tapered portion 5 of the movable member 4, it is possible to easily change the pushing force and the time required to complete the fixing. By using the fixing device of the present embodiment, it is possible to reduce the time until the completion of fixing by about 10 times compared with the conventional method.
It can be reduced by about a minute.

<Second Embodiment> FIG. 4 is a longitudinal sectional view of a seismometer fixing device using a cam member, in which 12 is a holding member, 13 is a rotating shaft, 14 is a pulse motor, 15 Is a cam member, and 16 is a fixed member.

As in the first embodiment described above, the holding member 12 is connected at one end to the seismometer, and the rotating shaft 13
Is rotatably held at one end substantially at the center of a substantially cylindrical holding member 12 substantially parallel to the longitudinal direction of the casing 20, and connected at the other end to a pulse motor 14 for correcting the attitude of the seismometer. . The pulse motor 14 also has a gear 21, and the torque is increased using the gear 21 so that the rotating shaft 13 can be sufficiently rotated. The fixing member 16 is also provided with a hole 18 provided at a right angle to the longitudinal direction of the casing 20 and in a radial direction from a substantially center of the holding member 12 in a radial direction.
2 and is movable in the radial direction of the casing 20. The three fixing members 16 are also provided at equal intervals around the rotation shaft 13 (see FIG. 5).

The rotary shaft 13 is provided with a cam member 15 so as to rotate integrally with the rotary shaft 13.
The cam member 15 has three protrusions 15a, 15a,
15a are provided at equal intervals, and the fixing members 16 and
One end of the holding member 12 at the center side of the holding member 16 is always in contact. Further, compression springs (elastic members) 17, 17, 17 are provided around the fixing members 16, 16, 16, and the fixing members 16, 1, 1 are provided in the same manner as in the first embodiment.
A force is applied to 6, 6 in the direction of releasing the fixation (inward of the holding member 12). The holding member 12 is provided with holes 19, 19 for passing wiring with connectors connected to various sensors incorporated in the seismometer (see FIG. 5).

Next, a method for fixing a seismometer using the seismometer fixing device will be described. As described above, the holding member 12 provided with the rotating shaft 13, the cam member 15, the fixing member 16 and the like is connected to a seismometer, and as shown in FIG. Insert up to the position. At this time, the cam member 4 is in contact with the fixing members 16, 16, 16 at the flat portions 15b, 15b, 15b.
6, 16 and 16 do not protrude from the outer periphery of the holding member 12 (see FIG. 5). After inserting the seismometer to a predetermined position in the casing 20, the pulse motor 14 is driven to rotate the rotating shaft 13
To rotate the cam member 15. Due to the rotation of the cam member 15, the cam member 15 is fixed to the fixing members 16, 1 by the protrusions 15a, 15a, 15a as shown in FIG.
6, 16 and comes into contact with the fixing members 16, 16,
16 is pushed out toward the outer periphery of the holding member 12. The extruded fixing members 16, 16, 16 are pressed against the inner peripheral surface of the casing 20 to fix the seismometer underground. When removing the seismometer from the inside of the casing 20, the cam member 15 is rotated by rotating the rotating shaft 13 in the opposite direction to the case where the rotating shaft 13 is fixed by the pulse motor 14 or in the same direction as when fixing the rotating shaft 13.
The fixing members 16, 1 are again fixed by the flat portions 15b, 15b, 15b.
Make contact with 6,16. At this time, the fixing member 1
6, 16 and 16 are compression springs 17 and 1 provided around them.
As a result of the rotation of the cam member 15 and the rotation of the cam member 15, the cam member 15 is gradually immersed inside the holding member 12, and the fixing of the seismometer to the inner peripheral surface of the casing 20 is released.

As described above, according to the seismometer fixing device of the above embodiment, the fixing members 16, 16 are formed by the protrusions 15 a, 15 a, 15 of the cam member 15 provided so as to be rotatable integrally with the rotating shaft 13. , 16 and the fixing members 16, 1
By fixing the seismometer by pressing the inner peripheral surface of the casing 29 in 6 and 16, the seismometer can be fixed by the pulse motor 14 for correcting the attitude of the seismometer, and the seismometer can be fixed. Not only is it unnecessary to provide a separate motor, but also the motor can be fixed instantaneously, so that the time until the completion of the fixing can be greatly reduced. Further, since compression springs 17, 17, 17 for applying a force in the direction of releasing the fixing are provided around the fixing members 16, 16, 16,
The removal of the seismograph can be performed quickly. Further, since the cam member 15 is rotated and the fixing members 16, 16, 16 are pushed out, it is a simple fixing mechanism, so that the holes 19, 19 for passing the wiring through the holding member 12 can be largely secured.
Not only can a connector be passed through the holding member 12, but also a small seismometer (approximately 60 mm in outer diameter) can be applied.

In the above embodiment, three fixing members are provided, respectively. However, the present invention is not limited to this, and the seismometer can be stably and securely fixed. Any number is acceptable. The number of protrusions of the cam member may be any number as long as it is the same as the number of fixing members. In addition, although a compression spring is used as the elastic member, any material other than the compression spring may be used as long as it has a force to pull the fixed member into the holding member. In addition, the shape and the like of the holding member and the fixing member are also arbitrary, and it goes without saying that the specific detailed structure and the like can be appropriately changed.

[0029]

As described above, according to the seismometer fixing device according to the first aspect of the present invention, the rotating shaft mounted on the holding member is rotated using the pulse motor for correcting the posture of the seismometer. By fixing the seismometer on the inner peripheral surface of the casing with a fixing member that moves in conjunction with the rotating shaft, there is no need to separately provide a motor for fixing the holding member, so that space for the connector can be secured. .

According to the seismometer fixing device according to the second aspect of the present invention, the elastic member is provided on the fixing member, and a force in a direction for releasing the fixing is applied, so that the seismometer can be easily and quickly removed from the casing. It can be carried out.

According to the seismometer fixing device according to the third aspect of the present invention, a plurality of fixing members are provided at substantially equal intervals around the rotation axis, so that the seismometer can be simultaneously connected to the plurality of fixing members.
It can be fixed stably and the fixing force can be increased.

According to the seismometer fixing device according to the fourth aspect of the present invention, the rotating shaft is rotated, and the movable member having the tapered portion screwed to the threaded portion of the rotating shaft is moved up and down to thereby form the tapered portion. Since the seismometer is fixed by pushing the fixing member that is in contact with it, a large force is not required for rotation of the rotating shaft, and the seismometer can be easily fixed to the inner peripheral surface of the casing by a pulse motor. .

According to the seismometer fixing device according to the fifth aspect of the present invention, the cam member rotates integrally with the rotation of the rotating shaft,
Since the seismometer is fixed by pushing the fixed member that is in contact with it, it does not require a large force to rotate the rotating shaft,
The seismometer can be easily fixed to the inner peripheral surface of the casing, and the time until the fixing is completed can be shortened.

[Brief description of the drawings]

FIG. 1 shows the structure of a seismometer fixing device as a first embodiment to which the present invention is applied, and is a longitudinal sectional view of a fixing device using a movable member having a tapered portion. This shows a state in which it is not fixed.

FIG. 2 is a longitudinal sectional view showing a state where the seismometer of the seismometer fixing device in FIG. 1 is fixed.

FIG. 3 is a cross-sectional view of the seismometer fixing device in FIG. 2 along the line AA.

FIG. 4 shows a structure of a seismometer fixing device as a second embodiment to which the present invention is applied, and is a longitudinal sectional view of a fixing device using a cam member, where the seismometer is not fixed. The state is shown.

FIG. 5 is a cross-sectional view of the seismometer fixing device in FIG. 4 taken along line BB.

6 is a cross-sectional view showing a state where the seismometer of the seismometer fixing device in FIG. 5 is fixed.

FIG. 7 is a schematic vertical sectional view showing the structure of a conventional seismometer fixing device.

8 is a view of the seismometer fixing device in FIG. 7 as viewed from the direction of arrow C.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Holding member 2 Rotating shaft 3 Pulse motor 4 Movable member 5 Taper part 6 Fixed member 7 Compression spring 11 Casing 12 Holding member 13 Rotating shaft 14 Pulse motor 15 Cam member 16 Fixed member 17 Compression spring 20 Casing

Continuation of the front page (72) Inventor Koichi Nakamura 2-7-1 Hironodai, Zama-shi, Kanagawa F-term in the Akashi Sagami Plant Co., Ltd. 2G064 AB19 BA21

Claims (5)

[Claims] 1. A fixing device for fixing a seismometer in a casing buried underground, wherein the fixing device is attached to a holding member substantially parallel to a longitudinal direction of the casing.
A rotating shaft, and a fixing member that can be fixed to the inner peripheral surface of the casing in conjunction with the rotation of the rotating shaft, wherein the rotating shaft is rotated by driving a pulse motor for posture correction incorporated in the seismometer, A seismometer fixing device. 2. The seismometer fixing device according to claim 1, wherein the fixing member is provided with an elastic member for applying a force in a direction of releasing the fixing. 3. The seismometer fixing device according to claim 1, wherein a plurality of fixing members are provided at substantially equal intervals around the rotation shaft. 4. The rotary shaft has a threaded portion on a side surface, a movable member screwed to the threaded portion of the rotary shaft, and movable up and down by rotation of the rotary shaft, and having a tapered portion with which a fixed member abuts. The seismometer fixing device according to claim 1, wherein: 5. The seismometer fixing device according to claim 1, wherein the rotation shaft includes a cam member which rotates integrally with the rotation shaft and abuts against the fixing member.