JPH0810253B2 - Sound wave generator - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a sound wave generator, and more particularly to a sound wave generator used for searching a soil structure.

<Prior art> At a civil engineering work site, etc., the operation of investigating the soil quality of a construction site by generating and detecting a sound wave is often performed before construction. FIG. 4 shows an example of a conventional generator. This sound wave generating device includes a device body 1 having a cylinder structure, a hydro piston 2 which is disposed inside the device body 1 and makes a stroke motion inside the device body 1, and a rocking attached to the tip of a piston rod 3 of the hydro piston 2. The bell 4, a hammer 5 arranged ahead of the locking bell 4 in the device body 1, an anvil 6 provided at the tip of the device body 1, and an inner side of the standing hole formed integrally with the anvil. Fixing member 7 for crimping to the wall and fixing the entire device
And a fluid pressure actuating member for actuating the hydro-piston 2 and the fixing member 7 by fluid pressure.

In the apparatus main body 1 in the state shown in FIG. 4, a cylinder chamber 8 for the stroke movement of the hydro-piston 2 is defined by a stopper 9 at the upper end portion, and the piston rod 3 has the stopper 9 And extends downward. The hammer 5 is a mallet part 5a that collides with the anvil 6 and this mallet part 5a.
And a rod portion 5b as a gripped portion which extends upward from the above and engages with the locking bell 4. In the main body 1 of the apparatus, a support stopper 10 is provided at a predetermined position below the stopper 9.
A spring 11 for urging the hammer 5 downward is loaded between the support stopper 10 and the hammer 5a of the hammer 5.

The fixing member 7 is arranged in each of the first and second cylinder chambers 12 and 13 which are opened in mutually opposite directions substantially at right angles to the length direction of the apparatus body 1. It is composed of a first clamp plate 14 and a second clamp plate 15 which are stroked in opposite directions. A fluid pressure operating member for operating the hydro-piston 2 and the first and second clamp plates 14, 15 is connected to the cylinder chamber 8 and the first and second cylinder chambers 12, 13 of the fixing member 7, Hoses 16 and 17 for supplying or discharging a working fluid are connected to the cylinder chamber 8 and the fixing member 7.

When generating a sound wave, the sound wave generator is suspended in a vertical hole formed by excavation in the ground, and a working fluid is supplied to the hose 16 to lower the hydro piston 2. At the same time, the locking bell 4 descends against the action of the spring 11 and engages with the tip of the rod 5b of the hammer 5 to grip it. Next, the sound wave generator is adjusted to a predetermined depth position in the vertical hole, and when the installation depth is determined, the fluid actuating member is actuated to supply the working fluid to the hose 17, while supplying the working fluid to the hose 16. The working fluid that had been discharged is discharged. By this operation, the hydro-piston 2 moves upward, while the working fluid is supplied to the first and second cylinder chambers 12 and 13 of the fixing member 7, and the clamp plates 14 and 15 come from the outer surface of the apparatus body 1. It projects outward and hits against the wall of the vertical hole to hold the entire sound wave generation fixed. During this time, the hydro-piston 2 continues to rise, and when the locking bell 4 comes into contact with the stopper 9, the rod 5b of the hammer 5 is disengaged from the locking bell 4. Then, the hammer 5 vigorously drops downward due to its own weight and the urging force of the spring 11, collides with the anvil 6 and generates a sound wave. Since this sound wave propagates in the ground as an elastic wave, the elastic wave is detected by an elastic wave detecting device provided at another point, and the tissue in the ground is analyzed.

<Problems to be Solved by the Invention> However, in such a conventional sound wave generating device, a working fluid for raising the hydro-piston 2 and a working fluid for holding the device in the upright hole. Since and are supplied by the same hose 17, for example, when it is desired to generate sound waves twice at the same depth position, in order to lower the hydro-piston 2 after hitting with the hammer 5 once. Must drain working fluid from hose 17. By this operation, the fixing member 7
Also, the operation is canceled and the entire sound wave generator is no longer held in the standing hole and moves. Therefore, in the first and second sound wave generation operations, sound waves are generated from different positions, which may reduce the acoustic wave detection accuracy.

The present invention has been made in view of such conventional problems, and an object thereof is to provide a sound wave generator capable of generating a sound wave any number of times while being fixed at a fixed position in a vertical hole. Is.

<Means for Solving the Problems> In order to achieve the above-mentioned object, the present invention provides a sound wave generator that includes a piston that makes a stroke motion in the main body of the apparatus and a fixing member that presses against the inner wall of the standing hole to hold the apparatus. On the other hand,
A first operating member that moves the piston in the apparatus body by fluid pressure and a second operating member that presses the fixing member to the inner wall of the vertical hole by fluid pressure are separately installed. It is what

<Operation> In generating a sound wave, the sound wave generator is suspended in the vertical hole and the depth is adjusted, and the second sound wave is generated at a predetermined position.
The working member supplies the working fluid to the fixing member to fix and hold the device. Then, or in parallel with the device fixing operation, the piston in which the gripping member is engaged with the gripped portion of the hammer is operated by the first operating member, and the lifting operation of the hammer is performed. Then, when the hammer is lifted to a predetermined height, the engagement releasing member releases the engagement between the grasping member and the grasped portion, and the hammer falls and collides with the anvil. Since the impact sound at this time is transmitted to the ground as an elastic wave, the elastic wave is detected by a detection device installed at a position separated from the sound wave generator by a certain distance and further analyzed. This completes the first sound wave generation and detection operation. If you want to regenerate sound waves under the same conditions, first
Since the actuating member and the second actuating member are independent of each other, if the first actuating member is actuated again while the second actuating member is actuated, the hammer is gripped and the hammer is lifted for the second time. An operation is performed and a sound wave is generated. If necessary, the sound wave is generated by activating the first actuating member as many times as necessary.

<Embodiment> FIGS. 1 to 3 are views showing an embodiment of a sound wave generator according to the present invention.

The sound wave generator according to this embodiment includes a device main body 18 extending vertically and having a cylinder structure, and a device main body 18 housed in a cylinder chamber 19 formed in an upper portion of the device main body 18.
Piston 20 that makes a stroke motion by fluid operation inside
A gripping member or locking bell 22 attached to the tip of the piston rod 21 of the piston 20, a hammer 23 arranged in front of the locking bell 22 inside the device body 18, that is, gripped by the locking bell 22, and a device. Body
An anvil 24 provided at the tip end portion of 18, and two fixing members 25 that are formed almost integrally with the anvil and press-fit to the inner side walls of the vertical holes in opposite directions to fix and hold the entire device, A first actuating member for moving the piston 20 within the apparatus body 18 by fluid pressure, that is, a first working fluid supply hose 26, and the first hose 26 are provided separately, and the fixing member 25 is actuated by the fluid pressure. The second actuating member, that is, the second actuating fluid supply hose 27, which is crimped to the inner wall of the upright hole.

The apparatus main body 18 is provided with a first stopper 28 that defines a cylinder chamber 19, and a second stopper 29 that is provided at a position that is separated downward by a predetermined distance from the first stopper 28, and the zenith portion is provided. A locking release member 30 is provided as a disengagement member composed of a rod portion 30a that hangs along substantially the central axis of the device body 18 and a spherical portion 30b provided at the tip of the rod portion 30a. . Piston rod 21 is first
This first stopper keeping the sealed state with the stopper 28 of
It extends through 28. The locking bell 22 provided at the tip of the piston rod 21 is formed integrally with the tip portion of the piston rod 21 and has an angle member 22a opened downward in a substantially U shape, and a hinge at the tip portion of the angle member 22a. The holding member 22c is rotatably connected to the holding member 22c. A tapered contact portion 22d is provided inside the upper end portion of the sandwiching member 22c, while an inwardly bent hook portion 22e for holding the hammer 23 is provided at the lower end portion. The releasing member 30 extends from the zenith of the apparatus main body 1 through the piston rod 21 into the locking bell 22, and the spherical portion 30b is installed inside the angle member 22a.

The hammer 23 includes a mallet part 23a that collides with the anvil 24 and the mallet part 2a.
3a and a rod 23b extending upward from the rod portion 23b.
A waist portion 23c as a gripped portion is formed at a tip end of the locking bell 22 so as to be engaged with the hook portion 22e of the locking bell 22 and has a smaller diameter than other portions. Further, in the apparatus main body 1, a tension spring 31 is loaded between the piston 20 and the first stopper 28 to constantly urge the piston 20 downward, while a hammer 23a of the hammer 23 and the second stopper 23 are provided. A compression spring 32 is mounted between the spring 29 and the spring 29 to constantly urge the hammer 23 downward.

The fixing member 25 includes a first cylinder chamber 33 formed in the lower part of the anvil 24 of the apparatus body 18, a second cylinder chamber 34 communicating with the first cylinder chamber 33, and the first and second cylinder chambers 34. And a moving element 35 accommodated in the cylinder chambers 33 and 34 so as to be capable of stroke movement. The mover 35 includes a pressing portion 35a that is pressed against the inner wall of the upright hole 40 to obtain the supporting force of the entire apparatus, a stopper portion (nut) 35b that is provided by being screwed to face the pressing portion 35a, and A rod portion 35c integrally connecting the pressing portion 35a and the stopper portion 35b is integrally formed. Then, the pressing portion 35a is inserted into the first cylinder chamber 33 so that the O-ring 36
The stopper portion 35b is accommodated in the second cylinder chamber 34 with a predetermined space therebetween while being accommodated in an airtight state by the. In addition, in the first cylinder chamber 33, a fluid supply passage connected to the second working fluid supply hose 27 and supplied with a working fluid such as compressed air between the pressing portion 35a and the bottom surface of the cylinder chamber. While 38 is connected, in the second cylinder chamber 34, a compression coil spring 37 is loaded between the stopper portion 35b and the bottom surface of the cylinder chamber. Thus, Fig. 3 in the rear the moving element 35 and the high pressure fluid is supplied from the passage 38 against the action of the compression coil spring 37, namely advances in the direction of the arrow S _1, S _2, the pressing portion 35a The inner wall of the vertical hole 40 is crimped. When the supply of the working fluid is released, the moving element 35 returns by the action of the compression coil spring 37.

On the other hand, the first working fluid supply hose 26 is connected to a portion of the cylinder chamber 19 below the piston 20. Therefore, the piston 20 is raised by the working fluid supplied to the cylinder chamber 19 through the working fluid supply hose 26, while it is lowered by the action of the tension spring 31 when the working fluid is discharged from the cylinder chamber 19, and by this repetition. Stroke motion is performed in the cylinder chamber 19.

In order to generate a sound wave by the sound wave generator having such a configuration, the sound wave generator is suspended in the vertical hole, and the position (depth position) of the device in the vertical hole is adjusted. Then, the working fluid is supplied to the fixing member 25 through the second working fluid supply hose 27 which is the second working member, thereby fixing the device in the standing hole. Next, when the working fluid in the cylinder chamber 19 is discharged through the first working fluid supply hose 26 which is the first working member, the piston 20 is moved downward by the action of the tension spring 31, and accordingly, the locking is caused. Bell 22 also descends. When the locking bell 22 reaches the tip of the rod 23b of the hammer 23, the hook portion 22e engages with the waist portion 23c and the locking bell 22 grips the hammer 23 (Fig. 1). Next, when the working oil is supplied into the cylinder chamber 19 through the first working fluid supply hose 26, the piston 20
And the rocking bell 22 and the hammer are lifted in the device body 18 against the action of the compression spring 32 (FIG. 2). Then, when the locking bell 22 rises to a predetermined height, the locking release member 30 moves relatively downward with respect to the locking bell 22, and the spherical portion 30b and the contact portion 22d.
And hit. Since the contact portion 22d has the inclined surface structure, the pressing force from the spherical body portion 30b is applied to the holding member 22c in the lateral direction to rotate the holding member 22c outward about the hinge 22b. As a result, the hook portion 22e and the waist portion 23c
Is disengaged, the hammer 23 receives its own weight and the action of the compression spring 32, falls within the apparatus main body 18, hits the anvil, and emits sound waves. This sound wave propagates in the ground as an elastic wave and is detected by the detection device to analyze the state of the ground.

Next, when it is desired to generate a sound wave again, if the working fluid is discharged from the first working fluid supply hose 26, the piston 20 and the locking bell 22 are lowered to grip the hammer 23, and the working fluid is further supplied to the cylinder chamber 19. If supplied, the hammer 23 will be raised as the piston 20 is raised, and the locking release member will be released again.
The gripping operation of the locking bell 22 is released by the action of 30, so that the hammer 23 falls and a sound wave is generated. In this way, the hammer 23 can be repeatedly raised and dropped many times.
While the hammer 23 is being raised and dropped, the working fluid is kept supplied to the fixing member 25, so that the sound wave generator is kept at a predetermined depth position in the vertical hole.

<Effects of the Invention> As described above, according to the present invention, a sound wave generator including a piston operated by fluid pressure and a fixing member is provided with a first operation member for piston operation and a fixing member operation. Since the second actuating member is provided separately and independently, the actuation of the fixing member is not stopped when the sound wave is repeatedly generated from the same place in the upright hole, and there is no problem such as positional deviation of the device. Can be done.

[Brief description of drawings]

FIG. 1 is a diagram showing a structure of a sound wave generator according to an embodiment of the present invention and an operating state in which a piston is lowered, and FIG. 2 is a diagram showing an operating state in which a hammer is gripped and lifted in the embodiment, and FIG. FIG. 4 is a view showing a portion of a fixing member of the sound wave generator according to the embodiment, and FIG. 4 is a view showing a conventional sound wave generator. 18 …… Main unit, 19 …… Cylinder chamber, 20 …… Piston,
21 …… Piston rod, 22 …… Rocking bell, 23 ……
Hammer, 24 ... Anvil, 25 ... Fixing member, 26 ... First working fluid supply hose (first working member), 27 ... Second working fluid supply hose (second working member).

Claims (1)

[Claims] 1. A device main body having a cylinder structure, a piston that makes a stroke motion in the device main body, a gripping member fixedly attached to the piston, an anvil provided at the tip of the device main body, a gripping member and a metal. A hammer member having a gripped portion that is disposed between the floor and engages with the gripping member, and a relationship between the gripping member and the gripped portion when the hammer member is separated from the anvil by a predetermined distance. An engagement releasing member for releasing the engagement, a fixing member arranged in the apparatus main body on the tip side of the anvil and crimping to the inner wall of the upright hole, and a first member for moving the piston in the apparatus main body by fluid pressure. A sound wave generator comprising: an actuating member; and a second actuating member which is provided separately from the first actuating member and presses the fixing member onto the inner wall of the standing hole by fluid pressure.