JP2001348858A - Soil penetration testing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a soil penetration testing device smaller in size and lighter in weigh by making the construction simple. SOLUTION: A weight 9 for hammering is so arranged as to be pulled up along a guide rod 7 arranged coaxially with a boring rod 3 by a linear driving mechanism and to freely drop along the guide rod 7. As constructed to be simple and light, the soil penetration testing device can be reduced in size and weight, facilitating the mounting of equipment and maintenance for regulation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground penetration test device capable of accurately and efficiently conducting a JIS standard penetration test and other ground investigations.

[0002]

2. Description of the Related Art A ground survey device used for a JIS standard penetration test is configured such that a hitting weight such as a drive hammer having a predetermined weight is freely dropped from above a height of 75 cm to a boring rod which has been previously penetrated substantially vertically into the ground. A predetermined impact load is applied to the rod, and the sinking dimension of the rod is measured. Various means have been proposed as means for lifting and dropping the impact weight. The weight is hung on a hook of a lifting device such as a winch and lifted to a height of 75 cm. There is a method in which the weight is released by freeing the weight, and a method in which a rope is wrapped around the weight and lifted to a height of 75 cm, and then the rope is rewound at once and released to drop the weight freely. In addition, the rope is connected to a hydraulic / pneumatic cylinder via a guide pulley or the like, and the weight is set to 75 cm.
In some cases, the hydraulic and pneumatic pressures are reduced at once, and the weight is allowed to fall freely.

[0003]

However, according to the above-mentioned conventional lifting mechanisms, the weight is lifted accurately to a height of 75 cm each time with respect to a boring rod that changes its sedimentation each time it is hit. It was difficult. That is, since the weight also moves downward in accordance with the sinking of the boring rod, the sinking stroke before and after the impact must be accurately measured, but the rope is wound up by a winch or the like or the weight is wound on itself.・
Accurate measurement was not possible with the rewinding method, and it was impossible to maintain the height as measured due to elongation of the rope.

Further, in the case of using a hydraulic / pneumatic cylinder, since the rope or the like is elongated in the same manner as described above, it is often impossible to realize the lifting height as set on the drive control side. It requires drive devices such as compressors, control devices, and other complicated and large-sized peripheral devices.
The space efficiency is low and the installation, adjustment and maintenance require much work and cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object and object an accurate and automatic detection of the position of a striking weight itself for a boring rod that sinks and changes with each strike. It is an object of the present invention to provide a ground penetration test apparatus capable of hoisting at a predetermined height, that is, accurately and automatically measuring the drop height of a hitting weight and performing a lifting / falling operation. Another object and object of the present invention is to provide a ground penetration test device having a lifting mechanism that has a simple structure, small size, light weight, and easy mounting and adjustment maintenance on the test device. Still another object and problem of the present invention is that data of the number of hits of the hitting weight and the sinking dimension data of the boring rod can be detected by a sensor and recorded and output, and the operation of the lifting mechanism can be controlled based on the data. It is an object of the present invention to provide a ground penetration test device. Another object and object of the present invention is to provide a ground penetration test device having a lifting mechanism that can be easily attached to and detached from a conventional ground penetration test device and other boring devices.

[0006]

According to a first aspect of the present invention, there is provided a ground penetration test apparatus according to the first aspect of the present invention, wherein a boring rod movably arranged in a vertical direction and a coaxial shaft with the boring rod. A guide rod disposed on the heart, a hitting weight disposed so as to freely fall along the guide rod, and a hitting weight disposed so as to be able to move up and down along the guide rod. A lifting mechanism having an attaching / detaching mechanism for stopping and lifting to a predetermined height, releasing the locked state and allowing the hitting weight to freely fall, and receiving the falling of the falling hitting weight. A striking receiving member fixedly and removably fixed to a part of the boring rod or the guide rod, a vertical mount fixed and disposed substantially parallel to the guide rod, and A guide mechanism for guiding the movement of the lifting mechanism having a traveling mechanism connected to the direct mount and traveling; a linear drive mechanism for lifting and lowering the lifting mechanism; and detecting a position of the lifting mechanism. And a control circuit for controlling the operation of the linear drive mechanism based on a signal from the position sensor.

According to a second aspect of the present invention, there is provided a ground penetration test apparatus according to the first aspect, wherein the linear drive mechanism is disposed and fixed substantially parallel to the guide rod. And a moving magnetic field portion fixed to the lifting mechanism facing the fixed magnetic field shaft.

According to a third aspect of the present invention, there is provided a ground penetration test apparatus according to the second aspect, wherein the linear drive mechanism has an N pole along a longitudinal direction of the fixed magnetic field shaft. It is a linear motor having a magnetized portion in which S poles are alternately arranged, and a coil portion that is disposed and fixed to the lifting mechanism so as to face the magnetized portion and forms a moving magnetic field portion.

According to a fourth aspect of the present invention, there is provided a ground penetration test apparatus according to the second aspect, wherein the linear drive mechanism includes a coil portion provided on the fixed magnetic field shaft, The linear motor is characterized by being a linear motor that is disposed and fixed to a lifting mechanism and has a magnetized portion in which N poles and S poles constituting a moving magnetic field portion are alternately arranged.

According to a fifth aspect of the present invention, there is provided a ground penetration test apparatus according to the first aspect, wherein the linear drive mechanism is disposed and fixed substantially in parallel with the guide rod. And a pinion portion disposed on the lifting mechanism and meshing with the rack, and an electric motor for driving the pinion portion.

According to a sixth aspect of the present invention, there is provided a ground penetration test apparatus according to the first aspect, wherein the linear drive mechanism includes a thread portion having a predetermined pitch and is rotatably supported. A drive shaft, an electric motor for driving the shaft to rotate forward and reverse, and a threaded portion with the screw portion are disposed and fixed to the suspension mechanism.

According to a seventh aspect of the present invention, there is provided a soil penetration test apparatus according to the present invention, wherein a boring rod is provided so as to be movable in a vertical direction, a guide rod is arranged on the same axis as the boring rod, and the guide rod is provided. A hitting weight arranged so as to be able to freely fall along the road, and an immovable or detachably fixed to a part of the boring rod or the guide rod in order to receive and stop the falling of the hitting weight which falls. And a hitting receiving member, wherein the hitting weight is provided so as to move along the guide rod by a linear drive mechanism.

According to an eighth aspect of the present invention, there is provided a ground penetration test apparatus according to the seventh aspect, wherein the guide rods have N poles and S poles arranged alternately along the longitudinal direction. A fixed magnetic field shaft; a fixed magnetic field shaft; a fixed magnetic field shaft; a fixed magnetic field shaft; a fixed magnetic field shaft; A linear drive mechanism is constituted by the use shaft and the moving magnetic field part.

According to a ninth aspect of the present invention, there is provided a ground penetration test apparatus according to the seventh aspect, wherein the guide rod rod has a coil portion, and constitutes a fixed magnetic field shaft. The hitting weight has a magnetized portion which is disposed and fixed to face the fixed magnetic field shaft, and has a magnetic field portion in which N poles and S poles constituting a moving magnetic field portion are alternately arranged. The linear drive mechanism is constituted by the magnetic field part.

[0015]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic side view of a ground penetration test apparatus according to the present invention, and FIG. 2 is a front view thereof. A well-known boring drive device (not shown) is installed inside the base gantry 1 formed of channel steel. Reference numeral 2 denotes a latch rotating mechanism installed on the side of the base stand 1, and the boring rod 3 inserted therein is rotatably held by a chuck mechanism or the like. Reference numeral 4 denotes a control panel provided on the other side of the base frame 1.

Reference numeral 5 denotes a vertical gantry which is erected on the upper surface of the base gantry 1 so as to be substantially parallel to the boring rod 3, and a part of a guide mechanism for guiding the lifting / lowering movement of the lifting mechanism 10 together with a traveling mechanism to be described later. Has formed. Reference numeral 6 denotes an upper support plate formed on the upper end of the vertical gantry 5, and a guide rod 7
A bearing is formed for rotatably inserting and supporting in a substantially vertical direction. Reference numeral 8 denotes a striking member called a knocking head or the like, which is detachably fixed to the lower end of the guide rod 7 or the upper end of the boring rod 3. Thus, the guide rod 7 and the boring rod 3 are connected via the impact receiving member 8 so as to be located on the same axis.

A drive hammer 9 serving as a hitting weight,
The monken or the like is loosely inserted into the guide rod 7 and arranged so as to be able to move up and down in the vertical direction. The monken is locked to the hook 11 of the lifting mechanism 10 and has a predetermined height, for example, JIS A219.
1995 In the standard soil penetration test method, after being lifted 75 cm above the impact receiving member 8 such as a knocking head, when the hook 11 is unlocked, the hook 11 falls freely along the guide rod 7 and receives the impact. The boring rod 3 is provided so as to collide with the member 8 and apply a predetermined impact load to forcibly cause the boring rod 3 to sink and penetrate into the ground, and to perform the process a predetermined number of times.

Reference numerals 12a and 12b denote two fixed magnetic field shafts which are disposed substantially in parallel with each other and are also disposed substantially in parallel with the boring rod 3 and the guide rod 7, respectively. 13b, it is fixed to the vertical gantry 5.

FIGS. 3 and 4 show the main part of the lifting mechanism 10. FIG. Fixed magnetic field shafts 12a and 12
b has a magnetized portion in which N poles and S poles for a fixed magnetic field are alternately arranged in the longitudinal direction, that is, in the entire length or in the vertical direction. Further, the lifting mechanism 10 is provided with coils 14a and 14b via a mount 140 so as to be opposed to the magnetized portion of the fixed magnetic field so as to form a moving magnetic field. Thus, the linear motor section for driving the lifting mechanism 10 up and down by the fixed magnetic field shafts 12a and 12b and the coil sections 14a and 14b is formed. Although the figure shows an example in which two sets of the combination of the fixed magnetic field shaft and the coil portion are provided, one or three or more sets may be used instead.

FIG. 5 is a sectional view taken along the line AA in FIG. On both sides of the front of the vertical base 5 made of C-shaped steel, etc.
Guide rails 51 and 52 made of a C-shaped steel or the like in which the concave portions are arranged in parallel to face inward are fixed in the vertical direction. 53 and 54 are sub-rails, and the guide rails 5
The rails 1 and 52 are provided upright on the inner surfaces to form rail surfaces in the vertical direction.

Reference numeral 101 denotes a slider in the lifting mechanism 10, which is made of C-shaped steel or the like and which has the above-mentioned guide rail 51.
And 52 so as to be movable up and down. Guide rollers 102, 103, 104, 105, and 106 are provided on both side surfaces of the slider 101, respectively. Among them, the guide rollers 103 and 106 are arranged so as to roll in contact with the inner surfaces of the guide rails 51 and 52 on the vertical gantry 5 side, and the guide rollers 102 are arranged so as to roll in contact with the surface of the sub rail 53 on the vertical gantry 5 side. Have been. With this arrangement, the slider 101 can move up and down along the guide rails 51 and 52 without rattling back and forth while maintaining a predetermined distance from the front surface of the vertical gantry 5. Further, the guide roller 104
And 105 are supported by a rotating shaft orthogonal to the rotating shafts of the guide rollers 102, 103 and 106, and are arranged so as to be able to roll while contacting the inner surfaces of the guide rails 51 and 52, respectively. With this arrangement, the slider 101
Is capable of moving up and down while keeping a predetermined interval with respect to the guide rails 51 and 52 without rattling. Thus, the guide rails 51 and 52, the sub rails 53 and 54, the slider 101, and the guide rollers 102 to 1
06 forms a traveling mechanism.

Reference numeral 15a denotes an optical sensor, and 15b denotes a reflecting mirror, which are disposed on the inner surface of the frame plate 16 of the lifting mechanism 10 so as to face each other. It is provided to occur.
It should be noted that the means for detecting the hitting weight 9 is not limited to the one related to the combination of the optical sensor 15a and the reflecting mirror 15b, and may be a reflection-type optical sensor that does not require a reflecting mirror, or an optical sensor. Alternatively, a proximity switch or the like can be used.

A known hook control mechanism 17 constituting a part of the lifting mechanism 10 is fixed to the frame plate 16, and the hook portion 11 connected below the hook control mechanism 17 can be opened and closed by a solenoid (not shown) or the like. It is provided in.

Next, the operation of this embodiment will be described with reference to FIGS.
This will be described with reference to FIG. First, in performing the first striking operation, the striking member 9 is stopped at a position where the striking weight 9 is placed on the upper end thereof, and the control panel 4 is operated to operate the power circuit 21 through the CPU circuit 20. Turn on. At this time, the hook portion 11 operates via the hook control mechanism 17 and is engaged with the upper portion of the hitting weight 9 to be locked. Further, electric power necessary for maintaining the stopped state so that the lifting mechanism 10 does not slide down from the locking position of the hook 11 is supplied to the coil parts 14a and 14b. As means for holding the lifting mechanism 10 in a stopped state,
Instead of or in addition to controlling the power to the coil portions 14a and 14b, a chuck mechanism (not shown) capable of holding the guide rod 7 is provided in the hook control mechanism 17 and operated by the CPU circuit 20. A lock mechanism (not shown) or the like that is controlled may lock the guide rod 7 and stop it.

Next, at least the lifting height H of the striking weight 9 is set as setting data necessary for the operation control of all the devices.
After inputting the number of hits and the like from the control panel 4 by key-in,
When the start key is turned on, those signals are sent to the CPU circuit 20.
Output to

Here, the lifting height H at the time of data input is
It refers from the upper end of the striking member 8 to the lower striking surface when the striking weight 9 is lifted, and is set to 75 cm in the standard JIS soil penetration test method described above. Can be entered. Similarly, the number of hits is provided so that an arbitrary number can be input.

The CPU circuit 20 stores the above setting data and outputs a signal for controlling the drive power of all the devices to the power supply circuit 21 based on the setting data. Since predetermined drive power required for the lifting movement of the lifting mechanism 10 is applied to the coil portions 14a and 14b, the coil portions 14a and 14b start rising along the fixed magnetic field shafts 12a and 12b. Upon receiving the lifting force, the lifting mechanism 10 is guided by the guide rails 51 and 52 in a state in which the impact weight 9 is suspended, and smoothly rises vertically without swinging back and forth and right and left.

Next, when the lifting mechanism 10 reaches a predetermined lifting height H input at the time of setting, for example, a position raised by 75 cm from the starting position, a stop signal from the CPU circuit 20 is received and the driving power for raising in the power supply circuit 21 is received. Is turned off, and only the power for the stop lock is supplied. In the measurement of the lifting height H, the magnets provided on the fixed magnetic field shafts 12a and / or 12b are arranged at a fixed pitch, and the position detecting magnetic sensor ( (Not shown) is provided in the lifting mechanism 10, the number of passing magnets is counted during the ascent, the magnet is converted into moving distance data, and is sequentially fed back to the CPU circuit 20, and is input from the control panel 4. This is performed by comparing with an initial setting value. Therefore, even when starting from any position on the fixed magnetic field shafts 12a and 12b, it is possible to measure easily and extremely accurately.

As a means for measuring the lifting height H, a method other than counting the number of magnets of the fixed magnetic field shafts 12a and 12b may be used. For example,
A separate magnetizing portion for position detection is provided in parallel with the fixed magnetic field shafts 12a and / or 12b, and has an encoder circuit for comparing the detection data with setting data (see Japanese Patent Application Laid-Open No. 7-107706). ) May be adopted. In this case, by making the pitch of the NS poles in the separate magnetized portions shorter than the pitch of the fixed magnetic field shafts 12a and / or 12b, a more precise measurement result can be obtained, and the lifting height H Control accuracy can be improved.

The position detecting circuit 22 outputs to the recording circuit 23 a starting position signal of the lifting mechanism 10 and a magnet total count signal at the end point of ascent. On the other hand, the optical sensor 15a normally emits light toward the reflecting mirror 15b. However, while the hitting weight 9 is engaged with the hook portion 11, the reflected light is blocked and no light is received. The initial value of the number-of-hits signal output from the CPU circuit 20 and the recording circuit 23 is "0".

Next, when a release signal is output from the CPU circuit 20 to the power supply circuit 21, power for releasing the known hook holding mechanism in the hook control mechanism 17 is applied, and the hook 11 releases the hitting weight 9.

With the release described above, the striking weight 9 leaves the lifting mechanism 10, falls freely along the guide rod 7 between the lifting heights H, hits the lower striking receiving member 8 and stops. The boring rod 3 penetrates into the test ground by receiving the impact force, and the impact receiving member 8 also moves downward by the amount of the penetration to reach the position 8a shown in FIG. At this time, the guide rod 7 and the impact weight 9 also slide downward together with the impact receiving member 8.

Here, the optical sensor 15a receives the reflected light from the reflecting mirror 15b due to the release fall of the hitting weight 9, and outputs a hit count value "1" to the CPU circuit 20 and the recording circuit 23. In the case where continuous hits are performed by setting from the control panel 4, the number of hits "2", "3",...

Next, the power supply circuit 21
, A power supply signal for lowering the lifting mechanism 10 is output. That is, a signal is output to turn off or reduce the power to the coil portions 14a and 14b of the linear motor that has been supplied so that the lifting mechanism 10 is stopped at the position of the first lifting height H. You. When the hook control mechanism 17 is provided with a chuck mechanism or the like for clamping and holding the guide rod 7 as described above, the CPU circuit 20 outputs a lock release signal.

Thus, the lifting mechanism 10 uses its own weight to guide the guide rod 7 and the fixed magnetic field shaft 12a,
It moves downward along 12b. At this time, slider 1
01, guide rollers 102, 103, 10
Since the wheels 4, 105, and 106 travel while being guided by the guide rails 51 and 52, the lifting mechanism 10 smoothly descends back and forth and left and right without rattling.

When the lifting mechanism 10 descends and the hook 11 reaches the upper end locking portion of the stopped striking weight 9 above the settled position 8a of the striking receiving member 8, the hooking member 11 is moved downward. The hook portion 11 is provided so that the tip hook portion of the hook portion 11 is forcibly pushed open and then closed and engaged. By this operation, the hook portion is engaged with the locking portion again to hold the striking weight 9, and the lowering movement of the lifting mechanism 10 is also stopped.

On the other hand, the position detecting circuit 22 counts the number of magnets passing on the fixed magnetic field shafts 12a and / or 12b via the position detecting sensor from the time when the lifting mechanism 10 starts lowering. The position data at the place where the lifting mechanism 10 stops is transferred to the CPU circuit 2.
In addition to feeding back to 0, the difference from the number of magnets counted when the lifting mechanism 10 was initially lifted is output to the recording circuit 23 as number difference data.

When the number difference data is input to the recording circuit 23, it is converted into distance data, that is, sedimentation dimension data from the initial setting position of the impact receiving member 8 to the settling position 8a, and the number of times of impact is "1". Is recorded as a pair of data. The pair of data is provided so that the data can be output to a CRT, a printer, or the like as needed.

Next, the second hitting operation is started. If the required number of hits is set to 2 or more before the first start, it is not necessary to input the set value to the control panel 4 again. , The power supply circuit 21 is kept turned on via the CPU circuit 20, and the same program procedure as the first time is automatically executed in all devices.

Here, when the lifting height H of the second hitting weight 9 is set to, for example, 75 cm from the hit receiving member 8 as in the first hitting, the position detecting circuit is provided during the lowering of the lifting mechanism 10. The distance data for the settling movement fed back from 22 to the CPU circuit 20 is initialized, and the initial set value of 75 cm is set as the second set value. When the lifting height H is previously set to the same height as the first time by the setting input from the control panel 4, the setting value H of the lifting height in the CPU circuit 20 is “initial setting value H + sedimentation dimension”.
Is replaced by

When the number of hits of the initial input is completed, the boring rod 3 for each number of hits recorded in the recording circuit 23 is output.
Is provided from a printer or the like and can be copied to a recording medium such as a flexible disk if necessary. Also, by the end of the predetermined number of hits, C
After the set values in the PU circuit 20 are all cleared,
The power to all devices can be turned off.

The ground penetration test apparatus according to the present invention is not limited to the above embodiment. For example, in the above description, a linear drive mechanism having a fixed magnetic field shaft for forming a fixed magnetic field and a coil part for forming a moving magnetic field has been exemplified as the linear drive mechanism. A rack portion disposed and fixed on the base stand 1, a pinion portion disposed on the lifting mechanism 10 and meshing with the rack portion, and a motor for driving the pinion portion. The CPU
By controlling with the circuit 20, the lifting mechanism 10 can be raised and lowered, and the height H of the striking weight 9 can be automatically calculated and controlled, or can be replaced with the fixed magnetic field shafts 12a and 12b. A screw portion having a predetermined pitch on a drive shaft rotatably supported on the base frame 1 and rotatably provided forward and reverse by an electric motor, and a screw nut portion provided with the screw portion provided and fixed to the lifting mechanism 10. And the CPU circuit 2 controls the rotation speed of the electric motor or the drive shaft.
It is an embodiment included in the present invention that the lifting mechanism 10 can be moved up and down by controlling at 0 and the height H of the hitting weight 9 can be arbitrarily controlled. It is also possible to program the CPU circuit 20 so that the JIS test method can be automatically performed from the start to the end.

In the above description, a magnetizing portion is formed on a fixed magnetic field shaft as a linear drive mechanism, and a coil portion constituting a moving magnetic field portion is disposed and fixed on the lifting mechanism. The moving magnetic field unit may be configured by providing a coil unit on the shaft and providing a magnetizing unit in the lifting mechanism in which N poles and S poles are alternately arranged along the longitudinal direction. In this case, the electric wire that supplies power to the coil
Since it does not move with the vertical movement of the lifting mechanism,
Wiring facilities can be simplified.

FIG. 7 is a view showing a ground penetration test apparatus according to another embodiment of the present invention. In the present embodiment, the guide rod 70 itself provided on the same axis as the boring rod 3 via the impact receiving member 8 has an N pole and an S pole for a fixed magnetic field in the longitudinal direction, that is, the entire length or a part thereof in the vertical direction. Are arranged alternately, and constitute a part of a linear motor part which is a linear drive mechanism.

The structure in which the hitting weight 90 movable along the longitudinal direction of the guide rod 70 is provided is the same as that of the above embodiment, but the structure of the hitting weight 90 is different from that described above. That is, the coil weight 91 is provided inside the striking weight 90 of the present embodiment. The coil section 91 is a moving magnetic field section fixed and disposed facing the magnetized section of the guide rod 70 constituting the fixed magnetic field shaft, and forms a linear drive mechanism together with the fixed magnetic field shaft.

A sensor portion 92 is fixed to an upper portion of the hitting weight 90, and a substantially L-shaped dog 94 is attached to the upper frame 31 arranged in the horizontal direction. Accordingly, when the impact weight 90 rises and reaches a predetermined height, the sensor unit 92 detects the dog 94, the sensor unit 92 is turned on, and a stop signal is issued. Reference numeral 93 denotes a power supply unit for exciting the coil unit 91. In this embodiment, the guide member 32 is supported in parallel with the guide rod 70 by the upper frame 31 arranged in the horizontal direction. The guide member 32 moves up and down along the guide member 32 and the striking weight 9
A detent member 33 connected to the zero is provided.

According to the present embodiment, when lifting the hitting weight 90 from the hitting receiving member 8 to a predetermined height, the hitting weight 90 is operated by a control panel (not shown) and the power is supplied to the coil unit 91 via the power supply unit 93. Supply. As a result, the impact weight 90 rises along the guide rod 70 constituting the fixed magnetic field shaft. At this time, according to the present embodiment, the hitting weight 90 is attached to the detent member 33.
Are connected, so that the guide rod 70
Is prevented from rotating around. Then, when reaching a position at a predetermined height, the sensor unit 92 detects the dog 94 and the supply of power from the power supply unit 93 is stopped. As a result, the ascent weight 90 stops its upward movement, but generates a constant coasting distance. Therefore, in order to set the ascending position to a desired position, it is preferable to adjust the mounting position of the sensor unit 92 in consideration of the inertia distance.

As shown in FIG. 7, since the coasting distance may not be stable, a stopper 34 having a predetermined length is provided on the upper frame 31, and the stopper 34 is forced to collide with the stopper 34, thereby forcing the desired distance. It is more preferable to provide a mechanism for stopping at the position.

When the supply of electric power is stopped, the impact weight 90 falls freely along the guide rod 70 and collides with the impact receiving member 8. As a result, the same penetration test as in the above embodiment can be performed.

According to the present embodiment, the guide rod 70 itself is used as the shaft for the fixed magnetic field, and the coil portion 91 is provided inside the striking weight 90, and both of them constitute a linear drive mechanism. Therefore, as compared with the above embodiment, the configuration is extremely simple, which contributes to a reduction in manufacturing cost.

In the above description, the impact weight 90
A stopper 33 is provided in order to further assure the ascending position of the striking member 90. However, instead of this mechanism or together with this mechanism, a reverse current is instantaneously input as a mechanism for surely stopping the ascent operation of the striking weight 90. Then, a control circuit for stopping the power supply after the reverse rotation may be employed.

Although the guide member 32 and the detent member 33 are provided in FIG. 7, these are not necessarily required. This is not necessary when the rotation of the impact weight 90 around the guide rod does not occur so much, or when a mechanism that does not entangle the electric wire even when rotated is used. Further, the sensor unit 92 and the dog 94 can be attached to the opposite positions of the embodiment shown in the drawings. In the case where it is mounted at the opposite position, there is no possibility that the impact at the time of drop of the hitting weight 90 adversely affects the sensor unit 92.

In the above description, the magnetizing portion is provided on the guide rod 70 to form a fixed magnetic field shaft, and the coil portion 91 is provided inside the striking weight 90 to constitute the moving magnetic field portion. The reverse is also possible. That is, a coil portion is provided on the guide rod 70, this is used as a shaft for a fixed magnetic field, and, for example, ring-shaped permanent magnets are alternately arranged along the axial direction in the striking weight 90 with N poles and S poles. Then, a magnetized portion is formed, and thereby a structure forming a moving magnetic field portion can be adopted. In this case,
Since the power supply unit 93 may be connected to the guide rod 70, wiring becomes easy. In addition, the hitting weight 90 is
Even if it rotates at the time of vertical movement, it is not necessary to consider the entanglement of the electric wire, so that the guide member 32 and the detent member 33 shown in FIG. 7 can be eliminated.

[0054]

According to the ground penetrating test apparatus of the present invention, for a boring rod whose subsidence dimension changes with each impact, the impact weight is accurately and automatically adjusted to a predetermined height along the guide rod each time. In addition to accurately and automatically measuring the drop height of the hitting weight, it can be lifted and dropped, and the sensor detects the number of hits of the hitting weight and the sinking dimension data of the boring rod. This can be recorded and the lifting mechanism can be controlled based on the data.

In addition, since the structure is simple and lightweight, the ground penetration test device can be reduced in size and weight, and the installation and adjustment maintenance of each device are easy.
Further, there is an advantage that the lifting mechanism can be easily attached to and detached from a conventional ground penetration test device and other boring devices.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing a ground penetration test apparatus according to one embodiment of the present invention.

FIG. 2 is a schematic front view showing a ground penetration test apparatus according to one embodiment of the present invention.

FIG. 3 is a partially omitted front view showing a lifting mechanism according to one embodiment of the present invention.

FIG. 4 is a partially omitted side view showing a lifting mechanism according to an embodiment of the present invention.

FIG. 5 is a sectional view taken along line AA in FIG.

FIG. 6 is a block circuit diagram showing an operation control system of the ground penetration test apparatus according to one embodiment of the present invention.

FIG. 7 is a view for explaining a ground penetration test apparatus according to another embodiment of the present invention.

[Explanation of symbols]

Reference Signs List 3 boring rod 4 control panel 5 vertical frame 7, 70 guide rod 8 hitting receiving member 9, 90 hitting weight 10 lifting mechanism 11 hook portion 12a, 12b fixed magnetic field shaft 14a, 14b, 91 coil portion 15a optical sensor 17 hook control Mechanism 51, 52 Guide rail 101 Slider 102, 103, 104, 105, 106 Guide roller

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takakatsu Katayama 11 Higashi-bukito, Ichiriyama-cho, Kariya-shi, Aichi Prefecture Inside (72) Inventor Tomohiko Takemitsu 11 Higashi-bukito, Ichiriyama-cho, Kariya-shi, Aichi Prefecture F term in the company (reference) 2D043 AA03 AB02 AC01 BB02 BC01

Claims (9)

[Claims] 1. A boring rod movably arranged in a vertical direction, a guide rod arranged on the same axis as the boring rod, and a hitting movably arranged along the guide rod. And a guide weight, which is arranged to be able to move up and down along the guide rod,
A lifting mechanism having an attachment / detachment mechanism for locking and lifting the hitting weight and lifting the hitting weight to a predetermined height to release the locked state so that the hitting weight can be freely dropped; A hitting member fixedly and removably fixed to a part of the boring rod or the guide rod while receiving and stopping the drop of the weight for use, and a vertical fixed and disposed substantially parallel to the guide rod. A stand,
A guide mechanism for guiding the movement of the lifting mechanism having a traveling mechanism connected to the vertical gantry to travel, a linear drive mechanism for moving the lifting mechanism up and down, and detecting a position of the lifting mechanism And a control circuit for controlling the operation of the linear drive mechanism based on a signal from the position sensor. 2. The ground penetration test apparatus according to claim 1, wherein the linear drive mechanism faces a fixed magnetic field shaft disposed and fixed substantially parallel to the guide rod, and faces the fixed magnetic field shaft. And a moving magnetic field portion fixed to the lifting mechanism. 3. The ground penetration test apparatus according to claim 2, wherein the linear drive mechanism includes a magnetized portion in which N poles and S poles are alternately arranged along a longitudinal direction of the fixed magnetic field shaft. ,
A ground penetration test device, which is a linear motor having a coil portion that is disposed and fixed to the lifting mechanism so as to face the magnetized portion and forms a moving magnetic field portion. 4. The ground penetration test apparatus according to claim 2, wherein the linear drive mechanism is provided and fixed to the coil section provided on the fixed magnetic field shaft and the lifting mechanism, and the moving magnetic field section is fixed to the lifting mechanism. A ground penetration test device, which is a linear motor having a magnetized portion in which N poles and S poles are alternately arranged. 5. The ground penetration test apparatus according to claim 1, wherein said linear drive mechanism is provided and fixed to said rack in substantially parallel to said guide rod, and said rack is provided to said lifting mechanism. A ground penetration test apparatus comprising: a pinion portion that meshes with a pinion; and an electric motor for driving the pinion portion. 6. The ground penetration test apparatus according to claim 1, wherein the linear drive mechanism is provided with a threaded portion having a predetermined pitch and rotatably supported, and the shaft can be rotated forward and reverse. A ground penetration test device, wherein a screwing portion between the motor for driving the screw and the screw portion is disposed and fixed to the suspension mechanism. 7. A boring rod movably arranged in the up-down direction, a guide rod arranged on the same axis as the boring rod, and a strike arranged so as to be free-falling along the guide rod. Ground penetration test comprising: a weight for impact and a hitting member fixedly or removably fixed to a part of the boring rod or guide rod to receive and stop the falling of the hitting weight. A ground penetration test apparatus, wherein the impact weight is provided so as to move along the guide rod by a linear drive mechanism. 8. The ground penetration test apparatus according to claim 7, wherein the guide rod includes a magnetized portion in which N poles and S poles are alternately arranged along a longitudinal direction, and forms a shaft for a fixed magnetic field. And a coil unit, which is disposed and fixed to the hitting weight so as to face the fixed magnetic field shaft and forms a moving magnetic field unit, wherein the fixed magnetic field shaft and the moving magnetic field unit use a linear drive mechanism. A ground penetration test device characterized by comprising: 9. The ground penetration test apparatus according to claim 7, wherein the guide rod rod includes a coil portion, forms a fixed magnetic field shaft, and faces the hitting weight against the fixed magnetic field shaft. The fixed magnetic field shaft and the moving magnetic field portion constitute a linear drive mechanism. A ground penetration test device characterized by the following.