JP2008261166A - Geological survey device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a geological survey device by which a penetration rod can be quickly and efficiently driven by a free fall of a weight, and reduction in size, weight and manufacturing cost of the geological survey device can be materialized by simplifying the structure of the whole device. <P>SOLUTION: A device body 2 comprising the geological survey device 1 is held in a standing posture and the penetration rod 4 vertically mounted on a cylindrical housing 3 of the device body 2 is inserted into the ground C. The weight 5 fallen to a weight lowered position B1 in the cylindrical housing 3 is attracted by a permanent magnet 6. Then, the weight 5 attracted by the permanent magnet 6 is raised to a weight raised position A1 from the weight lowered position B1 by a magnet lifting device 7. The weight 5 attracted by the permanent magnet 6 is brought into contact with a contact part 3c of the weight lowered position B1 and is allowed to fall freely, so that the penetration rod 4 is driven into the ground C by the impact generated by the free fall of the weight 5. Based on the length of penetration of the penetration rod 4 which is actually driven, predetermined items related to the geologic conditions like hardness/softness of the ground, degree of compaction, and ground supporting strength are surveyed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a geological survey device that surveys predetermined items related to the ground, such as the hardness of the ground, the tightness, and the ground support strength.

An example of a geological surveying device that surveys predetermined items related to the ground is a ground penetration testing device that surveys by drilling a boring rod into the ground by a striking load generated when the striking weight is freely dropped (see Patent Document 1). In this ground penetration test apparatus, after the hook portion of the lifting mechanism is locked to the upper portion of the impact weight, the entire lifting mechanism is raised to a desired height by the linear drive mechanism. After lifting and stopping the entire lifting mechanism to the desired height, the hook part is unlocked and the impact weight is allowed to fall freely from the desired height, and the boring rod is moved into the ground by the impact load generated during the fall. Some of them are driven in.
JP 2001-348858 A

  The ground penetration test device locks the hook of the lifting mechanism to the upper portion of the impact weight when raising the entire lifting mechanism to a desired height. When the impact weight is allowed to fall freely, the hook portion is released from the upper portion of the impact weight and unlocked, so that it takes time to engage and release the hook. As a method other than the hook, for example, there is a lifting mechanism that raises the nail to a desired height by locking the nail to the weight or holding the weight with a hanger, but the nail is locked as described above. Since the operation and the operation of holding with the hanger take time, the operation of driving the boring rod into the ground cannot be performed quickly.

  In view of the above problems, the present invention can quickly and efficiently drive the penetrating rod due to the free fall of the weight, simplify the overall configuration of the device, reduce the size and weight of the geological survey device, and reduce the production cost. The purpose is to provide a geological survey device that can perform the above.

  The geological survey device according to the first aspect of the present invention investigates a predetermined item of geology by driving a penetrating rod suspended from the main body of the device into the ground by an impact generated when the weight is freely dropped from a predetermined height. A geological survey device, wherein a weight guide means for guiding a weight placed on the same axis as the penetrating rod to drop in a direction in which the penetrating rod is driven substantially perpendicular to the ground, and A magnet that is excited by a magnetic force required to attract the weight, a magnet rising position where the weight attracted by the magnet is raised to a predetermined height, and a magnet descending position where the free fallen weight is attracted A magnet moving means that moves between the magnet, a weight separating means that separates the weight attracted to the magnet from the magnet raised to the magnet rising position against the magnetic force of the magnet, and the weight Intrusion lock driven into the ground by free fall And penetration length measuring means for measuring the penetration length of the driving and stopping of said magnet moving means, characterized in that a control means for controlling the measurement operation of the penetration length measuring means.

  According to the present invention, after the tip of the penetrating rod penetrates the ground of a desired length or is grounded to the ground, the magnet moving means is driven by the control means, and the magnet is moved to the magnet lowered position by the magnet lifting / lowering means. The weight that is freely dropped to the weight lowering position is adsorbed by a magnet. The magnet to which the weight is attracted is moved to the magnet raised position by the magnet lifting / lowering means. Thereafter, against the magnetic force of the magnet, the weight separating means forcibly separates the weight from the magnet and causes it to fall freely, and the penetrating rod is driven into the ground due to the impact generated when the weight is free dropped. Further, since the weight arranged on the same axis as the penetrating rod is guided to drop in the direction in which the penetrating rod is driven almost perpendicularly to the ground by the weight guide means, it occurs when the weight freely falls. The impact is applied to the direction in which the penetrating rod is driven substantially perpendicular to the ground. After dropping the weight as many times as desired and driving the penetrating rod into the ground, the magnet moving means is stopped by the control means, and the penetrating length of the penetrating rod driven into the ground is measured by the penetrating length measuring means. To do.

  The magnet can be constituted by a permanent magnet excited by a magnetic force necessary for attracting a weight, for example. Further, the weight guide means can be constituted by, for example, a cylindrical housing portion in which the weight is accommodated so as to be movable up and down, or a rod-like or shaft-like guide member in which the weight is attached so as to be movable up and down. . The magnet moving means is, for example, a magnet lifting / lowering device having a wire connected to the magnet, a pulley for winding the wire, and a motor for rotating the pulley in the winding direction and the rewinding direction, or a magnet is attached. The endless belt such as a chain can be constituted by a magnet rotating device or the like that rotates in the rotating direction. Further, the weight separating means can be configured by a contact portion such as a stepped portion or a protrusion that is in contact with the weight raised to a predetermined height, for example. The penetration length measuring means can be constituted by a distance detection sensor such as an ultrasonic sensor or a photoelectric sensor. The control means can be configured by a control device such as a control circuit including a PIC (Peripheral Interface Controller = peripheral device connection control IC), a CPU, a ROM, and a RAM.

  The geological survey device according to the second aspect of the present invention investigates a predetermined item of geology by driving a penetrating rod suspended from the device main body into the ground by an impact generated when the weight is freely dropped from a predetermined height. A geological survey device, wherein a weight guide means for guiding a weight placed on the same axis as the penetrating rod to drop in a direction in which the penetrating rod is driven substantially perpendicular to the ground, and A magnet excited by a magnetic force necessary to attract the weight, a magnet rising position where the weight attracted by the magnet is raised to a predetermined height, and a magnet descending position where the free-falling weight is attracted A magnet moving means that moves between the magnet and the magnet released when the weight adsorbed by the magnet is raised to a predetermined height, and the magnet is released when the free-falling weight is adsorbed Excitation control means for exciting the weight and free fall of the weight A penetrating length measuring means for measuring the penetrating length of the penetrating rod driven into the ground, driving and stopping of the magnet moving means, and a control means for controlling the measuring operation of the penetrating length measuring means. It is characterized by that.

  According to the present invention, after the tip of the penetrating rod penetrates the ground of a desired length or is grounded, the magnet moving means is driven by the control means, and the magnet is moved to the magnet lowered position by the magnet lifting / lowering means. . When the weight is attracted, the magnet is excited by the excitation control means, and the weight that is freely dropped to the weight lowering position is attracted by the magnet. The magnet to which the weight is attracted is moved to the magnet raised position by the magnet lifting / lowering means. When the weight adsorbed by the magnet is raised to a predetermined height, the excitation of the magnet is released by the excitation control means, the weight is separated from the magnet and allowed to fall free, and the impact generated when the weight falls freely Drive the penetrating rod into the ground. Further, since the weight arranged on the same axis as the penetrating rod is guided to drop in the direction in which the penetrating rod is driven almost perpendicularly to the ground by the weight guide means, it occurs when the weight freely falls. The impact is applied to the direction in which the penetrating rod is driven substantially perpendicular to the ground. After dropping the weight as many times as desired and driving the penetrating rod into the ground, the magnet moving means is stopped by the control means, and the penetrating length of the penetrating rod driven into the ground is measured by the penetrating length measuring means. To do.

  For example, the magnet may be an electromagnet that is excited when the weight is attracted and is de-energized when the weight is dropped. Further, the excitation control means includes, for example, a detection switch that detects a magnet such as a magnet switch, a proximity switch, a photoelectric switch, and a limit switch, and a control device that controls excitation of the magnet based on a detection signal output from the detection switch. Or the like.

  A geological survey device according to a third aspect of the invention is a cylindrical shape having a size and a shape that allows the weight to be accommodated together with the configuration according to the first or second aspect. It is characterized by comprising a housing part.

  According to this invention, the weight housed in the tubular housing portion is guided to drop along the inner surface of the tubular housing portion in the direction in which the penetrating rod is driven substantially perpendicular to the ground.

  A geological survey device according to a fourth aspect of the present invention is the geological survey device according to the first aspect, wherein the weight separating means is connected to the weight raised to the weight rising position by the magnet moving means. It is characterized by comprising an abutting portion that abuts.

  According to the present invention, the weight attracted by the magnet is raised from the weight lowered position to the weight raised position by the magnet moving means and brought into contact with the contact portion, and the reaction force generated at the time of contact causes the weight of the magnet to be increased. In contrast, the weight is forcibly separated from the magnet and allowed to fall freely. The abutting portion can be constituted by, for example, a stepped portion, a protrusion, or the like.

  A geological survey device according to a fifth aspect of the present invention is the geological survey device according to any one of the first to fourth aspects, wherein the weight of the magnet moving means is fixed to a predetermined height by the magnet moving means. It is characterized by comprising a magnet raising / lowering means for raising and lowering the magnet to a magnet raising position to be raised and a magnet lowering position to attract the free fallen weight.

  According to the present invention, the magnet is lowered to the magnet lowered position by the magnet raising / lowering means, and the weight that is freely dropped to the weight lowered position is attracted by the magnet. Since the magnet attracted by the weight is raised to the magnet rising position by the magnet lifting / lowering means, the weight placed on the same axis as the penetrating rod is placed in a direction in which the penetrating rod is driven substantially perpendicular to the ground. Can be raised and lowered. The magnet lifting / lowering means can be composed of, for example, a magnet lifting / lowering device provided with a wire connected to a magnet, a pulley for winding the wire, and a motor for rotating the pulley in the winding direction and the unwinding direction.

  A geological survey device according to a sixth aspect of the present invention is the weight according to any one of the first to fourth aspects, in which the magnet moving means is attached to the free-falling weight. It is characterized by comprising a magnet rotating means for moving the magnet around from a lowered position to a weight rising position where the weight attracted by the magnet is freely dropped.

  According to the present invention, the magnet is moved around from the weight lowered position to the weight raised position by the magnet turning means, and the weight that is freely dropped to the weight lowered position is attracted by the magnet and raised to the weight raised position. Therefore, it is not necessary to rotate the driving means such as a motor forward or reverse, or to drive and stop the driving means. The magnet turning means can be constituted by, for example, a magnet turning device including a loop-like chain to which a magnet is attached, upper and lower sprockets around which the chain is wound, a motor for rotating the sprocket, and the like.

  According to this invention, when the weight adsorbed by the magnet is raised to the weight lifting position, the penetrating rod is driven into the ground due to the impact generated when the weight is separated from the magnet and freely dropped. It is not necessary to operate the hook or claw to the weight and release the lock, or to hold it with the hanger and to release the hold. Operation can be performed quickly and efficiently. Moreover, since the structure of the whole apparatus is simplified, the geological survey apparatus can be reduced in size and weight, and the production cost can be reduced.

  According to the present invention, the operation of driving the penetrating rod due to the free fall of the weight can be performed quickly and efficiently, the structure of the entire apparatus can be simplified, the geological survey apparatus can be reduced in size and weight, and the production cost can be reduced. The purpose of being able to do this was achieved by driving the penetrating rod into the ground by the impact generated when the weight adsorbed by the magnet was raised to the weight lifting position and the weight was separated from the magnet and dropped freely.

  An embodiment of the present invention will be described in detail with reference to the drawings.

  The drawings show a geological survey device for investigating a predetermined item by driving a penetrating rod into the ground due to an impact caused by a free fall of a weight. In FIGS. 1 to 4, the geological survey device 1 is formed in a box shape. A cylindrical housing portion 3 whose upper end and lower end are closed is fixed substantially vertically downward at the center on the lower surface side of the apparatus main body 2 that has been formed. In addition, a penetrating rod 4 formed in a predetermined length is fixed to the central portion of the lower end side of the cylindrical housing portion 3 in a substantially vertical direction downward. In addition, a weight 5 for applying an impact necessary for driving the penetrating rod 4 into the cylindrical housing 3 and a permanent magnet 6 excited by a magnetic force necessary for raising the weight 5 are movable up and down. Is housed in.

  That is, after the weight 5 housed in the cylindrical housing portion 3 is attracted by the permanent magnet 6, the weight 5 attracted by the permanent magnet 6 is set in the cylindrical housing portion 3 by the magnet lifting and lowering device 7 described later. The weight is lowered from the lower weight lowering position B1 to the upper weight lifting position A1. At the weight rising position A1, the weight 5 is forcibly separated from the permanent magnet 6 and freely dropped, and the penetration rod 4 is driven into the ground C by the impact generated at the time of the free fall to investigate predetermined items of geology. is there.

  The weight 5 and the permanent magnet 6 accommodated in the cylindrical accommodating portion 3 are disposed on the same axis as the penetrating rod 4, and the penetrating rod 4 is substantially the same as the ground C along the inner surface of the cylindrical accommodating portion 3. It is guided up and down in the direction of being driven vertically. In addition, the front-end | tip part of the penetration rod 4 is formed in the shape (for example, sharp shape) which becomes thin gradually toward a front-end | tip.

  The cylindrical housing part 3 forms a lower housing part 3a in which the weight 5 is housed and an upper housing part 3b in which only the permanent magnet 6 is housed. The lower accommodating portion 3a having a larger cross section than the upper accommodating portion 3b is formed in a size and shape that allows the weight 5 to be accommodated (see FIG. 1). Further, the upper accommodating portion 3b having a smaller cross section than the lower accommodating portion 3a is formed in a size and shape that allows only the permanent magnet 6 to be accommodated.

  In addition, an abutting portion 3c that abuts against the upper peripheral edge of the weight 5 adsorbed by the permanent magnet 6 is formed at the step formed between the lower accommodating portion 3a and the upper accommodating portion 3b. ing. That is, the contact portion 3c lifts the weight 5 attracted by the permanent magnet 6 from the weight lowering position B1 set in the cylindrical housing portion 3 by the magnet lifting device 7 described later to the weight lifting position A1. At this time, the weight 5 is brought into contact with the outer peripheral edge of the upper end side. The weight 5 is forcibly separated from the permanent magnet 6 and freely dropped against the magnetic force of the permanent magnet 6 by the reaction force generated at the time of contact.

  The contact portion 3c has a height that is substantially horizontal to the lower surface of the apparatus main body 2 corresponding to the weight lifting position A1 of the weight 5, and is outside the upper end side of the weight 5 raised to the weight lifting position A1. It is provided at a height position that is in contact with the peripheral edge. Further, the contact portion 3 c is formed in a size and a shape that allow the elevating and lowering of the permanent magnet 6, and is formed in a size and a shape that makes contact with the upper peripheral edge of the weight 5. . Moreover, since it forms in the taper surface which becomes gradually narrow toward the upper side accommodating part 3b from the lower side accommodating part 3a, when raising the permanent magnet 6 from the lower side accommodating part 3a to the upper side accommodating part 3b, it accommodates the upper side accommodating The permanent magnet 6 is accommodated and guided toward the portion 3b.

  The magnet elevating device 7 includes a wire 7a connected to the upper end of the permanent magnet 6, a pulley 7b to which the upper end of the wire 7a is fixed, and a motor 7c directly connected to the center of the pulley 7b. Has been placed.

  The lower end of the wire 7 a is connected to the upper end of the permanent magnet 6 accommodated in the cylindrical accommodating portion 3 through an insertion hole 3 d formed in the central portion on the upper end side of the cylindrical accommodating portion 3. The upper end of the wire 7a is fixed to a pulley 7b to which a motor 7c is directly connected.

  The motor 7c is connected to a power source 8 composed of a battery to be described later, and is rotated forward and backward by a command signal output from a control device 20 (see FIG. 5) to be described later. Further, forward / reverse rotation can be performed by operating a rise switch 10 and a drop switch 11 described later.

  That is, the motor 7c is rotationally driven in the downward direction, the pulley 7b is rotated in the winding direction, and the wire 7a connected to the permanent magnet 6 is wound around the pulley 7b. 3 Ascending along the inner surface from the magnet lowering position B2 (solid line of FIG. 2) to the magnet raising position A2 (solid line of FIG. 3). Further, the motor 7c is rotationally driven in the upward direction, the pulley 7b is rotated in the rewinding direction, and the wire 7a connected to the permanent magnet 6 is rewound from the pulley 7b. 3 Along the inner surface, the magnet descends from the magnet ascending position A2 to the magnet descending position B2. In this way, by moving the permanent magnet 6 up and down to the magnet ascending position A2 and magnet descending position B2, the penetrating weight 4 disposed on the same axis as the penetrating rod 4 is substantially perpendicular to the ground. Can be moved up and down in the direction of driving.

  The weight 5 is formed to have a weight necessary for driving the penetrating rod 4, and the entire weight 5 or a portion to which the permanent magnet 6 is attracted is made of a metal that can be attracted by a magnetic force. In addition, the appearance of the weight 5 is formed in a size and shape that allows vertical movement with respect to the lower housing portion 3 a of the cylindrical housing portion 3. In the embodiment, the 5 kg weight 5 is freely dropped from the drop height of 50 cm, but the weight 5 may be changed to, for example, a weight of 5 kg or less or 5 kg or more. Moreover, you may change the fall height of the weight 5 corresponding to fall distance b1, b2 mentioned later to the height of 50 cm or less or 50 cm or more, for example.

  The permanent magnet 6 is composed of a permanent magnet excited by a magnetic force necessary to attract the weight 5, and the outer appearance of the permanent magnet 6 is allowed to move up and down with respect to the upper housing portion 3 b of the cylindrical housing portion 3. It is formed in the size and shape.

  On the side surface of the apparatus main body 2, a power switch 9 for energizing each part with power supplied from the power supply 8, a raising switch 10 for raising the magnet lifting device 7, and a lowering switch 11 for lowering are arranged. is doing. Further, on the lower surface of the apparatus main body 2, the distance from the lower surface of the apparatus main body 2 corresponding to the upper end of the weight 5 raised to the weight rising position A1 to the ground C where the penetration rod 4 is grounded or penetrated is measured. A distance detection sensor 12 is arranged. Further, on the upper surface of the apparatus main body 2, a changeover switch 13 for switching the driving operation of the penetrating rod 4 between manual and automatic, a display 14 for displaying the number of times the penetrating rod 4 is driven, the penetrating length, and the like, A leveler 15 for adjusting the posture is arranged.

  Further, the magnet lifting device 7, the power switch 9, the raising switch 10, the lowering switch 11, the distance detecting sensor 12, the changeover switch 13, the display 14, the later-described raising detecting switch 16, and the lowering detecting switch. 17, the forward / reverse circuit 18, and the transformer 19 are connected to a control device 20 described later (see FIG. 5).

  The power source 8 is constituted by a battery in which electric power necessary for driving the geological survey device 1 is stored, and a forward / reverse circuit 18 (to be described later) for switching forward / reversely the electric power supplied to the motor 7c of the magnet lifting / lowering device 7. The control device 20 is connected via a transformer 19 that transforms the voltage to a voltage suitable for driving the circuit. In place of the battery, for example, a home or industrial external power source, a solar power generation device, or the like may be used as the power source 8. Instead of the transformer 19, a rectifier circuit that converts electric power from alternating current to direct current and transforms the voltage to a voltage suitable for driving the circuit may be used.

  The distance detection sensor 12 includes a transmission unit (not shown) that transmits a detection wave D (for example, an ultrasonic wave) having a short wavelength toward the ground C, and a reception unit (not shown) that receives the detection wave D reflected by the ground C. And is attached downward with respect to the lower surface of the apparatus body 2 corresponding to the upper end of the weight 5 raised to the weight raising position A1. The distance detection sensor 12 applies the detection wave D transmitted from the transmitting portion substantially vertically toward the ground C into which the penetration rod 4 has been penetrated before and after the penetration rod 4 has been driven. The detection wave D reflected by the ground C is received by the receiving unit, and the received detection signal is output to the control device 20.

  The display 14 is composed of a 7-segment digital display, and is provided so as to be readable by an operator's eyes. The indicator 14 displays driving information such as the number of driving of the penetrating rod 4 and the penetrating length of the penetrating rod 4 output from the control device 20. Further, an analog display may be used instead of the digital display.

  The level 15 is composed of a level in which a liquid is sealed, and is provided so as to be readable by an operator's eyes. This level 15 displays the posture of the entire apparatus by the position of the bubbles enclosed in the liquid. That is, the penetration rod 4 can be driven substantially perpendicularly to the ground C by adjusting the attitude of the entire apparatus so that the bubbles in the liquid are positioned substantially in the middle. Further, a laser level may be used instead of the liquid level.

  The ascending detection switch 16 and the descending detection switch 17 are composed of magnet switches that detect the permanent magnet 6. The ascent detection switch 16 is provided on the outer surface of the upper accommodating portion 3b of the cylindrical accommodating portion 3, detects that the permanent magnet 6 of the magnet elevating device 7 has been elevated to the magnet ascent position A2, and detects the detection signal as a control device 20. Output to. The lowering detection switch 17 is provided on the outer surface of the lower accommodating portion 3a, detects that the permanent magnet 6 has been lowered to the magnet lowering position B2, and outputs a detection signal to the control device 20. When the changeover switch 13 is automatically set, the control device 20 immediately reverses the drive of the motor 7c when detection signals are output from the rise detection switch 16 and the fall detection switch 17. At the time of manual setting by the changeover switch 13, when detection signals are output from the rise detection switch 16 and the fall detection switch 17, the driving of the motor 7c is immediately stopped.

  The control device 20 is constituted by a peripheral device connection control IC (commonly called PIC), and is arranged at the upper left side in the device main body 2. Moreover, it drives with the electric power supplied from the power supply 8 via the trans | transformer 19, and controls operation | movement of the whole apparatus according to the operation | movement program memorize | stored beforehand.

  That is, the control device 20 includes the upper end of the weight 5 raised to the weight raising position A1 based on the detection signal output from the distance detection sensor 12 before starting to drive the penetrating rod 4 (see FIG. 1). A distance a1 from the corresponding lower surface of the apparatus main body 2 to the ground C into which the tip of the penetrating rod 4 penetrates is calculated. Further, the falling distance b1 of the weight 5 is subtracted from the entire distance a1 to calculate the penetration distance c1 of the penetration rod 4, and information on the distances a1, b1, and c1 is stored.

  After the driving of the penetrating rod 4 is completed (see FIG. 4), the distance a2 from the lower surface of the apparatus main body 2 to the ground C where the penetrating rod 4 is driven is calculated based on the detection signal output from the distance detection sensor 12. The remaining distance c2 of the penetrating rod 4 is calculated by subtracting the falling distance b2 of the weight 5 from the total distance a2. Further, the penetration distance c2 calculated after the end of driving (see FIG. 4) is subtracted from the penetration distance c1 calculated before starting driving (see FIG. 1) to obtain the penetration distance c3 of the actually inserted penetration rod 4. While calculating, the information of the distances a2, b2, and c2 is stored.

  The total distance a1 measured before the start of driving is the same as the sum of the falling distance b1 of the weight 5 and the penetration distance c1 of the penetration rod 4. The total distance a2 measured after the driving is completed is the same as the sum of the falling distance b2 of the weight 5 and the penetration distance c2 of the penetration rod 4.

  As another calculation method, if the distance a2 (see FIG. 4) measured after the end of driving is subtracted from the total distance a1 (see FIG. 1) measured before starting the driving of the penetrating rod 4, the penetration actually injected The penetration distance c3 of the rod 4 can be calculated.

  When the driving operation of the penetrating rod 4 is automatically performed, after the changeover switch 13 is switched to automatic and then the lowering switch 11 is manually turned on, the control device 20 causes the penetrating rod 4 to move in accordance with an operation program stored in advance. The driving operation starts automatically.

  When the lowering switch 11 is manually turned ON, the control device 20 rotates the motor 7c of the magnet lifting device 7 in the lowering direction. The wire 7a wound around the pulley 7b is rewound, and the permanent magnet 6 is lowered along the inner surface of the cylindrical housing portion 3 to the magnet lowering position B2, and is moved to the weight lowering position B1 at the bottom of the lower housing portion 3a. The free-falling weight 5 is attracted by the permanent magnet 6 (see FIGS. 1 and 2).

  When the permanent magnet 6 is lowered to the magnet lowering position B2, the control device 20 rotates the motor 7c of the magnet lifting device 7 in the upward direction based on the detection signal output from the lowering detection switch 17. The wire 7a is wound around the pulley 7b, the permanent magnet 6 is raised along the inner surface of the cylindrical housing portion 3 to the magnet rising position A2, and the weight 5 adsorbed by the permanent magnet 6 is heavier along the inner surface of the cylindrical housing portion 3. The weight is raised to the weight raising position A1 (see FIG. 3). The weight 5 raised to the weight raising position A1 comes into contact with a contact portion 3c provided at a step portion between the lower housing portion 3a and the upper housing portion 3b, and is forcibly separated from the permanent magnet 6 to be lowered. It is freely dropped to the weight lowering position B1 at the lowermost part of the housing 3a (see FIG. 4).

  When the permanent magnet 6 rises to the magnet raising position A2, the control device 20 rotates the motor 7c of the magnet lifting device 7 in the downward direction based on the detection signal output from the rise detection switch 16. Since the wire 7a wound around the pulley 7b is unwound and the permanent magnet 6 is lowered along the inner surface of the cylindrical housing 3 to the magnet lowering position B2, the weight 5 that has freely dropped to the weight lowering position B1 is obtained. It is attracted again by the permanent magnet 6 (see FIGS. 1 and 2).

  When the permanent magnet 6 is lowered to the magnet lowering position B2, the control device 20 rotates the motor 7c of the magnet lifting device 7 in the upward direction based on the detection signal output from the lowering detection switch 17. The wire 7a is wound around the pulley 7b, and the permanent magnet 6 is raised to the magnet raising position A2 along the inner surface of the cylindrical housing 3. In the same manner as described above, the weight 5 attracted by the permanent magnet 6 is raised to the weight lifting position A1, is brought into contact with the contact portion 3c, is forcibly separated from the permanent magnet 6, and is freely dropped. Thus, the driving operation of the penetrating rod 4 due to the free fall of the weight 5 is programmed to be repeated a preset number of times.

  When the driving operation of the penetrating rod 4 is performed manually, the control device 20 rotates the motor 7c of the magnet elevating device 7 in the descending direction when the lowering switch 11 is manually turned on after the changeover switch 13 is switched to manual. . The wire 7a wound around the pulley 7b is rewound, the permanent magnet 6 waiting at the magnet ascending position A2 is lowered to the magnet descending position B2, and the weight 5 that freely falls to the weight descending position B1 is moved by the permanent magnet 6. Adsorb. When the permanent magnet 6 is lowered to the magnet lowering position B <b> 2, the lowering detection switch 17 detects the permanent magnet 6 and outputs a detection signal to the control device 20. The control device 20 stops the motor 7c of the magnet lifting device 7 at the same time that the detection signal is output from the lowering detection switch 17.

  Further, when the raising switch 10 is manually turned ON, the control device 20 causes the motor 7c of the magnet lifting device 7 to rotate in the raising direction. The wire 7a is wound around the pulley 7b, the weight 5 attracted by the permanent magnet 6 is raised to the weight rising position A1, is brought into contact with the contact portion 3c, is forcibly separated from the permanent magnet 6 and is freely dropped. When the permanent magnet 6 rises to the magnet raised position A2, the rise detection switch 16 detects the permanent magnet 6 and outputs a detection signal to the control device 20. At the same time when the detection signal is output from the ascent detection switch 16, the control device 20 stops the motor 7c of the magnet elevating device 7 and makes the permanent magnet 6 stand by at the magnet ascending position A2.

  In the embodiment, the ascending detection switch 16 and the descending detection switch 17 are composed of magnet switches, but may be composed of, for example, proximity switches, non-contact type switches such as photoelectric switches, and contact type switches such as limit switches.

  The illustrated embodiment is configured as described above, and a geological survey method using the geological survey apparatus 1 will be described below.

  First, before the investigation is started, the entire device is adjusted to an upright posture in which the penetrating rod 4 is driven substantially perpendicularly to the ground C by the operator's hand while observing the position of the bubbles in the leveling device 15. The tip of the penetrating rod 4 is penetrated into the ground C by a desired length using the weight (see FIG. 1). In addition, when the penetration rod 4 is not penetrated into the ground C even if the weight of the whole apparatus is added, the whole apparatus or the penetration rod 4 may be rotated by a desired number of times to penetrate. Moreover, you may support mechanically the standing posture of the whole apparatus with support apparatuses, such as a support rod, a support leg, and a holding frame, for example.

  Next, before the penetration rod 4 starts to be driven (see FIG. 1), the power switch 9 is turned on, and the detection wave D transmitted from the distance detection sensor 12 is directed toward the ground C into which the penetration rod 4 has penetrated. Apply it almost vertically. The detection wave D reflected by the ground C is received by the distance detection sensor 12, and the received detection signal is output to the control device 20.

  Based on the detection signal output from the distance detection sensor 12, the control device 20 calculates a distance a <b> 1 from the lower surface of the device body 2 to the ground C where the penetration rod 4 is penetrated. In addition, the falling distance b1 of the weight 5 is subtracted from the entire distance a1 to calculate the penetration distance c1 of the penetration rod 4, and information on the distances a1, b1, and c1 is stored. Further, the distance between the bottom surface of the penetrating device main body 2 and the ground C to which the tip of the penetrating rod 4 is grounded is stored as distance information before the start of driving without penetrating the tip of the penetrating rod 4 into the ground C. Good.

  When the driving operation of the penetrating rod 4 is automatically performed, when the changeover switch 13 is switched to the automatic operation and the lowering switch 11 is manually turned ON, the control device 20 drives the penetrating rod 4 according to the operation program stored in advance. The operation starts automatically.

  That is, when the lowering switch 11 is turned on, the control device 20 rotates the motor 7c of the magnet lifting device 7 in the lowering direction. The wire 7a wound around the pulley 7b is unwound, the permanent magnet 6 is lowered to the magnet lowering position B2, and the weight 5 that has been freely dropped to the weight lowering position B1 at the lowermost part of the lower accommodating portion 3a is made permanent. It is attracted by the magnet 6 (see FIGS. 1 and 2).

  When the permanent magnet 6 is lowered to the magnet lowering position B2, the control device 20 rotates the motor 7c of the magnet lifting device 7 in the upward direction based on the detection signal output from the lowering detection switch 17. The wire 7a is wound around the pulley 7b, and the permanent magnet 6 is raised to the magnet raising position A2. The weight 5 attracted by the permanent magnet 6 is raised to the weight lifting position A1 and is brought into contact with the contact portion 3c. The weight 5 is forcibly separated from the permanent magnet 6 and the weight lowering position B1 at the bottom of the lower housing portion 3a. Therefore, the penetrating rod 4 is driven into the ground C by an impact generated when the weight 5 is freely dropped (see FIG. 4).

  When the permanent magnet 6 rises to the magnet raising position A2, the control device 20 rotates the motor 7c of the magnet lifting device 7 in the downward direction based on the detection signal output from the rise detection switch 16. The wire 7a wound around the pulley 7b is rewound, the permanent magnet 6 is lowered to the magnet lowering position B2, and the weight 5 that has been freely dropped to the weight lowering position B1 at the lowermost part of the lower accommodating portion 3a is taken as the permanent magnet. 6 again (see FIGS. 1 and 2).

  When the permanent magnet 6 is lowered to the magnet lowering position B2, the control device 20 rotates the motor 7c of the magnet lifting device 7 in the upward direction based on the detection signal output from the lowering detection switch 17. The wire 7a is wound around the pulley 7b, and the permanent magnet 6 is raised to the magnet raising position A2. The weight 5 attracted by the permanent magnet 6 is brought into contact with the contact portion 3c at the weight raising position A1, and is forcibly separated from the permanent magnet 6 and freely dropped (see FIG. 3). Thus, the penetration rod 4 is driven into the ground C by repeating the driving operation of the penetration rod 4 by the free fall of the weight 5 a predetermined number of times.

  After the driving of the penetrating rod 4 is completed (see FIG. 4), the detection wave D transmitted from the distance detection sensor 12 is applied substantially perpendicularly to the ground C on which the penetrating rod 4 is driven. The detection wave D reflected by the ground C is received by the distance detection sensor 12, and the received detection signal is output to the control device 20.

  Based on the detection signal output from the distance detection sensor 12, the control device 20 calculates a distance a <b> 2 from the lower surface of the device body 2 to the ground C where the penetrating rod 4 is driven. The remaining distance c2 of the penetrating rod 4 is calculated by subtracting the falling distance b2 of the weight 5 from the total distance a2. Thereafter, if the penetration distance c2 calculated after completion of driving (see FIG. 4) is subtracted from the penetration distance c1 of the penetration rod 4 calculated before starting driving (see FIG. 1), the penetration rod 4 actually driven in The penetration distance c3 can be calculated. Thus, since the penetration distance c3 of the penetration rod 4 driven by the free fall of the weight 5 is calculated, it is necessary to evaluate predetermined items related to geology such as the hardness of the ground, the tightness, and the ground support strength. A measurement result is obtained. The indicator 14 displays the number of times the penetration rod 4 is driven, the penetration length, and the like.

  Further, after the changeover switch 13 is switched to the manual operation, the raising switch 10 and the lowering switch 11 are manually turned ON, and the driving operation of the penetrating rod 4 due to the free fall of the weight 5 is performed manually as many times as desired. Good.

  As described above, the weight 5 attracted by the permanent magnet 6 is lifted from the weight lowering position B1 to the weight lifting position A1 by the magnet lifting device 7 and brought into contact with the contact portion 3c. Since the penetrating rod 4 is driven into the ground C by impact generated when the 5 is forcibly separated and freely dropped, the hook or claw is locked to the weight and the locking is released as in the conventional example, The operation and mechanism such as holding and releasing the holding by the hanger are unnecessary, and the driving operation of the penetrating rod 4 by the free fall of the weight 5 can be performed quickly and efficiently. Moreover, since the structure of the whole apparatus is simplified, the geological survey apparatus 1 can be reduced in size and weight, and the production cost can be reduced.

  Further, the weight 5 arranged on the same axis as the penetrating rod 4 is guided to drop in the vertical direction in which the penetrating rod 4 is driven substantially perpendicular to the ground C along the inner surface of the cylindrical housing 3. Therefore, the impact generated when the weight 5 is freely dropped can be applied to the direction in which the penetrating rod 4 is driven substantially perpendicularly to the ground C, and the driving work using the free falling of the weight 5 is ensured. Yes.

  FIG. 6 shows another embodiment of the geological survey device 1 including the magnet rotating device 27 that attracts the weight 5 with the permanent magnet 6 attached to the chain 28 and lifts the weight 5 from the weight lowering position B1 to the weight lifting position A1. In the embodiment, the magnet rotating device 27 includes a sprocket 29 in which a chain 28 to which the permanent magnet 6 is attached is pivotally supported on the outer surface on the upper end side of the cylindrical housing 3 and a sprocket 30 in which the chain 28 is supported on the outer surface on the lower end side. The motor 31 disposed on the upper right side in the apparatus main body 2 is looped by the arrow in the figure from the weight lowering position B1 to the weight lifting position A1 via the sprockets 31a, 31b and the chain 31c. Rotate in direction E.

  In other words, while the permanent magnet 6 is rotated in the rotating direction E by the rotation of the chain 28, the permanent magnet 6 is opened to the entire length of the side surface of the cylindrical housing 3 (the total length from the weight lowering position B1 to the weight lifting position A1). Insert into the opening 3e from the lower end side and extract from the upper end side.

  The weight 5 that freely falls to the weight lowering position B1 of the cylindrical housing portion 3 is attracted by the permanent magnet 6 and is raised from the weight lowering position B1 to the weight lifting position A1 along the opening 3e. When the weight 5 attracted by the permanent magnet 6 is raised to the weight lift position A1, the weight 5 attracted by the permanent magnet 6 is brought into contact with the contact portion 3c of the weight lift position A1, and the permanent magnet 6 The weight 5 is forcibly separated from the permanent magnet 6 and free-falled against the magnetic force. Since the penetrating rod 4 is driven into the ground C by an impact generated when the weight 5 is freely dropped, the operation and effect substantially the same as those of the above embodiment can be achieved. Further, it is not necessary to excite the weight 5 when it is adsorbed, or to release the excitation when the weight 5 is dropped, and it is not necessary to rotate the motor 31 forward or reverse, or to drive and stop it. Reduction can be achieved.

  Further, the chains 28 to which the permanent magnets 6 are attached are arranged on both sides of the cylindrical housing portion 3, and the pair of left and right chains 28 and 28 to which the permanent magnets 6 and 6 are attached are synchronously rotated in the circumferential direction E. Thus, the weight 5 housed in the cylindrical housing portion 3 may be attracted by the pair of left and right permanent magnets 6 and 6 and raised from the weight lowered position B1 to the weight raised position A1.

  FIG. 7 shows another embodiment of the geological survey device 1 including the magnet lifting / lowering device 7 that attracts the weight 5 with the excitable electromagnet 6A and lifts the weight 5 from the weight lowering position B1 to the weight lifting position A1. Then, when the electromagnet 6A is lowered from the magnet raised position A2 to the magnet lowered position B2 by the magnet lifting device 7, the control device 20 excites the electromagnet 6A based on the detection signal output from the lowering detection switch 17. The weight 5 that is freely dropped to the weight lowering position B1 of the cylindrical housing 3 is adsorbed by the electromagnet 6A. When the weight 5 attracted by the electromagnet 6A is lifted from the weight lowering position B1 to the weight lifting position A1, the control device 20 excites the electromagnet 6A based on the detection signal output from the lift detection switch 16. Is released, and the weight 5 is separated from the electromagnet 6A and allowed to fall freely. Since the penetrating rod 4 is driven into the ground C by an impact generated when the weight 5 is freely dropped, the operation and effect substantially the same as those of the above embodiment can be achieved.

  Further, when the winding amount of the wire 7a by the pulley 7b is detected, and the weight 5 adsorbed by the electromagnet 6A coincides with the winding amount detected when the weight 5 is lifted to the weight lifting position A1, the electromagnet 6A The excitation may be released to allow free fall. The electromagnet 6A is connected to the power source 8 and the control device 20 via an electric wire (not shown). Moreover, you may provide the contact in which electricity supply is accept | permitted on the opposing surface of the cylindrical accommodating part 3 and the electromagnet 6A.

  FIG. 8 shows another embodiment of the geological survey device 1 including the magnet rotating device 27 that attracts the weight 5 with the electromagnet 6A and raises the weight 5 from the weight lowering position B1 to the weight lifting position A1, and the electromagnet 6A. Is moved around from the weight rising position A1 to the weight lowering position B1 by the magnet rotating device 27, the control device 20 excites the electromagnet 6A based on the detection signal output from the lowering detection switch 17. The weight 5 that is freely dropped to the weight lowering position B1 of the cylindrical housing 3 is adsorbed by the electromagnet 6A. When the weight 5 attracted by the electromagnet 6A is lifted from the weight lowering position B1 to the weight lifting position A1, the control device 20 excites the electromagnet 6A based on the detection signal output from the lift detection switch 16. Is released, and the weight 5 is separated from the electromagnet 6A and allowed to fall freely. Since the penetrating rod 4 is driven into the ground C by an impact generated when the weight 5 is freely dropped, the operation and effect substantially the same as those of the above embodiment can be achieved.

  In other embodiments of FIGS. 6 to 8, parts having the same configuration as those of the above embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

In the correspondence between the configuration of the present invention and the above-described embodiment,
The weight guide means of the present invention corresponds to the cylindrical housing portion 3 of the embodiment,
Similarly,
The weight separating means corresponds to the contact portion 3c of the cylindrical housing portion 3,
The magnet of claim 1 corresponds to the permanent magnet 6,
The magnet of claim 2 corresponds to the electromagnet 6A,
The magnet moving means corresponds to the magnet elevating device 7 which is a magnet elevating means and the magnet orbiting device 27 which is a magnet orbiting means,
The penetration length measuring means corresponds to the distance detection sensor 12,
Excitation control means and control means correspond to the control device 20,
The present invention is not limited to the configuration of the above-described embodiment, but can be applied based on the technical idea shown in the claims, and many embodiments can be obtained.

  For example, you may employ | adopt the structure which adsorb | sucks the weight 5 (refer FIGS. 1-4) with the electromagnet 6A (refer FIG. 7). In this case, the overcurrent of the motor 7c generated when the weight 5 adsorbed by the electromagnet 6A is brought into contact with the contact portion 3c is detected, and the excitation of the electromagnet 6A is canceled based on the detection signal output at the time of detection. Then, the weight 5 is freely dropped from the electromagnet 6A.

Sectional drawing which shows the descent | fall operation | movement of the magnet which comprises a geological survey apparatus. Sectional drawing which shows the state which adsorb | sucked the weight of the weight fall position with the magnet. Sectional drawing which shows the state which raised the weight adsorbed with the magnet to the weight raising position. Sectional drawing which shows the driving | running state of the penetration rod by the free fall of a weight. The circuit diagram which shows the control system of a control apparatus. Sectional drawing which shows the other example of the geological survey apparatus which orbits a magnet. Sectional drawing which shows the other example of the geological survey apparatus which adsorb | sucks a weight with an electromagnet. Sectional drawing which shows the other example of the geological survey apparatus which orbits an electromagnet.

Explanation of symbols

A1 ... Weight lifting position B1 ... Weight lowering position A2 ... Magnet lifting position B2 ... Magnet lowering position C ... Ground D ... Detection wave 1 ... Geological survey device 2 ... Device main body 3 ... Cylindrical housing portion 3c ... Contact portion 4 DESCRIPTION OF SYMBOLS ... Penetration rod 5 ... Weight 6 ... Magnet 6A ... Electromagnet 7 ... Magnet raising / lowering device 7c ... Motor 8 ... Power supply 9 ... Power switch 10 ... Lift switch 11 ... Drop switch 12 ... Distance detection sensor 13 ... Changeover switch 14 ... Indicator 15 ...... Leveling device 16 ... Ascent detection switch 17 ... Ascent detection switch 18 ... Forward / reverse circuit 19 ... Transformer 20 ... Control device 27 ... Magnet rotating device 28 ... Chain 29, 30 ... Sprocket 31 ... Motor

Claims (6)

It is a geological survey device that investigates a predetermined item of geology by driving a penetrating rod suspended from the device body into the ground due to an impact generated when the weight is freely dropped from a predetermined height,
A weight guide means for guiding a weight placed on the same axis as the penetrating rod to drop in a direction in which the penetrating rod is driven substantially perpendicular to the ground;
The magnet excited by the magnetic force necessary to attract the weight, the magnet rising position where the weight attracted by the magnet is raised to a predetermined height, and the magnet descending where the free fallen weight is attracted Magnet moving means for moving between positions;
Weight separating means for separating the weight attracted to the magnet from the magnet raised to the magnet rising position against the magnetic force of the magnet,
Penetrating length measuring means for measuring the penetrating length of the penetrating rod driven into the ground by the free fall of the weight;
A geological survey apparatus comprising: driving and stopping of the magnet moving means; and control means for controlling the measuring operation of the penetration length measuring means. It is a geological survey device that investigates a predetermined item of geology by driving a penetrating rod suspended from the device body into the ground due to an impact generated when the weight is freely dropped from a predetermined height,
A weight guide means for guiding a weight placed on the same axis as the penetrating rod to drop in a direction in which the penetrating rod is driven substantially perpendicular to the ground;
The magnet excited by the magnetic force necessary to attract the weight, the magnet rising position where the weight attracted by the magnet is raised to a predetermined height, and the magnet descending where the free fallen weight is attracted Magnet moving means for moving between positions;
Excitation control means for releasing excitation of the magnet when the weight attracted by the magnet is raised to a predetermined height and exciting the magnet when attracting the free-falling weight;
Penetrating length measuring means for measuring the penetrating length of the penetrating rod driven into the ground by the free fall of the weight;
A geological survey apparatus comprising driving and stopping of the magnet moving means and control means for controlling the measuring operation of the penetration length measuring means. The geological survey device according to claim 1 or 2, wherein the weight guide means is configured by a cylindrical housing portion having a size and shape that allows the weight to be housed. 2. The geological survey device according to claim 1, wherein the weight separating means is constituted by a contact portion that comes into contact with a weight raised to a weight rising position by the magnet moving means. The magnet moving means is a magnet raising / lowering means for raising and lowering the magnet to a magnet rising position where the weight attracted by the magnet is raised to a predetermined height and a magnet descending position where the weight that has fallen free is attracted. The configured geological survey device according to any one of claims 1 to 4. Magnet rotating means for moving the magnet from the weight lowering position where the weight that has fallen free is attracted to the weight rising position where the weight attracted by the magnet is freely dropped The geological survey device according to any one of claims 1 to 4, comprising:

Images