JP2013129960A - Device for automatically inserting/drawing out ground investigation rod into/from ground - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for automatically drawing out a ground investigation rod from the ground, which can be made compact and simplified.SOLUTION: A device 10 for automatically drawing out a ground investigation rod from the ground includes a base 13, a drive gear 18 rotatably provided in the base 13, a drive motor 12 that can rotate the drive gear 18 in a normal rotation direction and a reverse rotation direction, and a driven gear 22 capable of approaching and separating relative to the drive gear 18 and capable of holding a ground investigation rod 203 with the drive gear 18 when approaching it.

Description

  The present invention relates to a device for automatically extracting a ground survey rod from the ground and a ground survey method using the same.

An example of the ground survey method is a method based on a Swedish sounding test defined by JIS standards. As shown in FIG. 4, the test method is as follows. A solid rod 103 made of iron or stainless steel having a digging screw member (screw point) 101 attached to the lower end is pushed against the ground G, and the upper part of the rod 103 is placed. A clamp 102 and a handle 105 are attached. Next, a plurality of disc-shaped weights 104 are sequentially placed on the clamp 102, and the sinking of the rod 103 is observed and recorded. At this time, if the rod 103 does not sink at the stage where all the weights 104 having a predetermined load are placed, the number of rotations required for the rod 103 to sink by 25 cm is determined by the rotation by the handle 105. Record. In addition, since the rod 103 is 1 m at the longest, as shown in FIG. 4, a plurality of extension rods 103 a are added to advance to a predetermined depth (usually 10 m).
In this way, the screw point 101 is penetrated into the ground G, and the strength of the ground is estimated from the rotation speed and penetration length of the rod 103.

By the way, although the rotation of the handle 105 was performed by human power, it is extremely difficult to penetrate to the depth of 10 m because the frictional force to the screw point 101 increases. Further, the rod 103 is pulled out manually by using a large lever device or the like. However, there is a problem that much labor is required.
In view of this, an apparatus capable of automatically inserting and extracting a rod by a mechanical device as shown in Patent Document 1 has been developed.

JP 2000-352043 A

The apparatus shown in Patent Document 1 forms a support frame that can be freely assembled and disassembled above the Swedish sounding test apparatus, and the rod is rotated around the axis line in this support frame to be excavated on the ground. And a winch device that pulls out the rod after completion of the test.
The apparatus disclosed in Patent Document 1 is labor-saving in that the rod can be automatically inserted and pulled out.
However, there is a problem that the apparatus becomes larger and complicated. Further, the rod penetration mechanism and the pull-out mechanism are integrated, and these are always used together with the Swedish sounding test apparatus, and there is another problem that they cannot be diverted.

  The present invention has been made to solve the above-mentioned problems, and the object of the present invention is to reduce the size and simplification, and can be used separately from the Swedish sounding test apparatus, and can be used for other test methods. An object of the present invention is to provide a device for automatically extracting a ground survey rod from the ground, and a ground survey method using the same.

In order to achieve the above object, the present invention comprises the following arrangement.
That is, the automatic pulling device from the ground of the ground investigation rod according to the present invention includes a base, a drive gear rotatably provided on the base, and the drive gear can be rotated in the normal rotation direction and the reverse rotation direction. And a driven gear provided so as to be able to contact and separate relative to the drive gear and capable of clamping a ground investigation rod between the drive gear and the drive gear when approached. To do.

The driven gear may be provided so as to be able to contact and separate from the drive gear, and a lock mechanism that locks the movement of the driven gear at a position where the driven gear approaches the drive gear may be provided.
The driven gear is mounted on a rotation arm provided on the base so as to be rotatable about a rotation axis, and the rotation arm rotates to contact and separate from the drive gear. The lock mechanism can be configured as a lever mechanism having an eccentric cam surface that presses the rotation shaft to lock the rotation.
It is preferable to provide a guide member for guiding the movement of the rod.

The ground survey method according to the present invention is characterized in that, in a Swedish sounding test, a rod penetrating into the ground is pulled out from the ground using any one of the above-described automatic pulling devices from the ground.
Further, in this case, after the rod is pulled out from the ground, the rod for other ground investigation is pulled out by rotating the drive gear in the reverse direction using the automatic pulling device as it is. It can penetrate into the hole to conduct other ground surveys.

  According to the present invention, a device for automatically extracting a ground investigation rod from the ground, which can be miniaturized and simplified, can be used separately from a Swedish sounding test device, and can be diverted to other test methods, The purpose is to provide a ground survey method to be used.

It is a front view of the automatic extraction apparatus from the ground of the ground investigation rod. It is a top view of the automatic drawing apparatus shown in FIG. It is a side view of the automatic drawing apparatus shown in FIG. It is explanatory drawing for demonstrating the test method by a Swedish sounding test.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a front view of an automatic pulling device (hereinafter also simply referred to as a pulling device) 10 from the ground of a ground investigation rod, FIG. 2 is a plan view thereof, and FIG. 3 is a side view thereof.
Reference numeral 12 denotes a drive motor, which is fixed to the back side of a support plate (part of the base) 14 erected on the base 13 by bolts 15. On the front side of the support plate 14, a drive gear 18 is fixed to a rotating shaft 16 of the drive motor 12 via a speed reducer 17. The drive motor 12 is a forward / reverse motor, and can rotate the drive gear 18 in the forward direction and the reverse direction. Reference numeral 19 denotes a control unit of the drive motor 12.

  Reference numeral 20 denotes a rotation arm, which is provided around a rotation shaft 21 fixed to the support plate 14 so as to be rotatable via a bearing in a direction in which the distal end side is in contact with and away from the drive gear 18. A driven gear 22 is provided on the distal end side of the rotating arm 20 so as to be rotatable about a shaft 23 via a bearing. As a result, the driven gear 22 is provided so as to be rotatable in the direction of contact with and away from the drive gear 18 together with the rotary arm 20, and when approaching the drive gear 18, the driven gear 22 is inserted into the ground G during the Swedish sounding test. The rod 203 can be clamped with the drive gear 18.

The rotating arm 20 is normally biased in a direction away from the drive gear 18 by being pulled by the coil spring 25, and the eccentric cam 27 of the lock mechanism 26 is brought into contact with the contact surface 20a at the end. Is in contact with the cam surface 27a.
The eccentric cam 27 is rotatably provided via a bearing on a support shaft 30 fixed to the support plate 14. The cam surface 27 a of the eccentric cam 27 is provided eccentric to the support shaft 30.

  A handle 31 is attached to the eccentric cam 27. When the abutting surface 20a of the rotating arm 20 contacts the cam surface 27a and the rotating arm 20 is rotated in the hour hand rotating direction in FIG. 1 by the coil spring 25, the eccentric cam 27 is turned upside down in FIG. The handle 31 rotates in the hour hand rotating direction, the handle 31 comes into contact with the stopper 32 (the position indicated by the broken line in FIG. 1), and is always stationary at this position.

  On the other hand, when the handle 31 is rotated from the position of the broken line to the direction of the solid line (direction of hour hand rotation) in FIG. 1, the eccentric cam 27 is rotated in the same direction, and the cam surface 27a resists the urging force of the coil spring 25. The rotating arm 20 is pressed in the direction approaching the drive gear 18 to clamp the rod 203 between the drive gear 18 and the driven gear 22. At this position, the handle 31 comes into contact with the stopper 33, and the rotating arm 20, and hence the driven gear 22, is locked and does not return to the above-described stationary position.

That is, when the eccentric cam 27 rotates beyond a certain position (maximum pressing position to the driven gear 22), the direction of the pressing force from the contact surface 20a of the rotating arm 20 to the cam surface 27a of the eccentric cam 27 is eccentric. The cam 27 acts to further rotate in the same direction, and at that position, the handle 31 comes into contact with the stopper 32 and is locked.
In the lock position, it is preferable that the direction of the axis of the rotation arm 20 (the direction of the line connecting the rotation shaft 21 and the rotation shaft 23) is slightly inclined toward the drive gear 18.
Of course, the locking mechanism 26 is not limited to that of the above-described embodiment, and various mechanisms can be adopted.
As shown in FIGS. 1 and 2, introduction members 35 and 35 for guiding the rod 203 between the drive gear 18 and the driven gear 22 are provided on the upper and lower portions of the support plate 14.

Further, as shown in FIG. 1, the back surface of the rod 203 is arranged so that the rod 203 introduced between the drive gear 18 and the driven gear 22 is accurately positioned between the drive gear 18 and the driven gear 22 on the support plate 14 surface. Bolts 37 are provided for abutting and positioning on the side. The bolt 37 can adjust the length of protrusion from the support plate 14 so as to cope with variations in the thickness of the rod 203.
In addition, a positioning member 38 is provided at an appropriate position on the base 13 for abutting and positioning on the front side of the rod 203 when the rod 203 is introduced between the drive gear 18 and the driven gear 22. The positioning member 38 is appropriately fixed to the base 13 with bolts or the like after the rod 203 is introduced between the drive gear 18 and the driven gear 22.

The drawing device 10 of the present embodiment is configured as described above.
The pulling device 10 is mainly used for pulling out the rod 203 that has penetrated into the ground G in the Swedish sounding test and other ground surveys. In particular, in the case of the Swedish sounding test, the rod 203 penetrates into the ground G at a depth of 10 m, so that it is difficult to pull out the rod 203 as described above. If is used, it can be easily pulled out.

Hereinafter, a Swedish sounding test will be described as an example.
The Swedish sounding test is carried out as usual, as shown in FIG. In this case, a known dedicated device (not shown) that can automatically penetrate the rod 203 can be used. Since this dedicated device does not require a rod pulling device, it can have a simple structure.

  After the Swedish sounding test is completed, the Swedish sounding tester and the dedicated device can be removed and used for the next Swedish sounding test. In the case of a detached house, it is necessary to conduct ground surveys at about five locations. In the case of the present embodiment, the following Swedish sounding test can be continuously performed using the removed Swedish sounding tester or the dedicated device.

The rod 203 is left where the Swedish sounding test is completed. In order to pull out the rod 203, the pulling apparatus 10 according to the present embodiment is used.
First, the pulling device 10 is set at a position where the rod 203 is pulled out. That is, the rod 203 is set so as to be positioned between the drive gear 18 and the driven gear 22 while being guided by the introduction members 35 and 35. In this case, the pulling device 10 is arranged so that the back surface of the rod 203 is in contact with the bolt 37 and the side surface of the rod 203 is in contact with the gear surface of the drive gear 18. When the height of the rod 203 is insufficient, the additional rod is added so that the upper end portion of the rod 203 is positioned between the drive gear 18 and the driven gear 22.

  Next, as described above, the handle 31 is rotated from the broken line position to the solid line position in FIG. 1, the driven gear 22 is rotated in the direction of the drive gear 18, and the rod 203 is clamped between the drive gear 18 and the driven gear 22. . As described above, when the driven gear 22 is pressed by the action of the lever, the gears of the drive gear 18 and the driven gear 22 bite into the side surface of the rod 203.

In this state, the positioning member 38 may be fixed on the base 13 and the front side of the rod 203 may be positioned. The positioning member 38 may be set before the rod 203 is clamped between the drive gear 18 and the driven gear 22.
Next, when the rod 203 is pulled out, the pulling device 10 is appropriately fixed to the ground G with a fixture (not shown) so that the pulling device 10 does not float up.

  Next, the control unit 19 drives the drive motor 12 to rotate the drive gear 18 in the counterclockwise direction in FIG. Then, since the gears of the drive gear 18 and the driven gear 22 rotate while biting into the side surface of the rod 203, the rod 203 is pulled upward. The bolt 37 and the positioning member 38 function as a guide member for moving (raising) the rod 203. In the case of the present embodiment, the rod 203 can be pulled out by 1 m in about 10 seconds. The rods 203 are lifted up by appropriate lengths, and all the rods 203 are pulled up while removing the connecting rods.

The pulling device 10 may be used exclusively for pulling out the rod 203, but other ground surveys can be continued using the rod pullout hole from which the rod 203 has been pulled out.
Other ground surveys include, for example, groundwater level measurement surveys and ground sample collection surveys.

  As a measurement survey of the groundwater level, for example, the extraction device 10 of the present embodiment can be used in the groundwater level measurement method disclosed in JP 2010-145263 A. In the case of this groundwater level measurement method, after inserting a hollow rod with a hole in the side to a predetermined depth in the ground, connect the measurement insulated cable connected to a measuring instrument with a function of detecting a change in electrical resistance to the hollow rod. The change in the electrical resistance between the electrodes when the electrode part on the tip side of the insulated cable reaches the surface of the groundwater that has entered the hollow rod is detected, and the groundwater is detected from the insertion length of the insulated cable at the time of detection. The position is measured (claim 1).

  The hollow rod for measuring the groundwater level can be inserted into and extracted from the rod extraction hole from which the rod 203 has been extracted, using the extraction device 10 of the present embodiment. That is, when penetrating the hollow rod, similarly to the above, the hollow rod is clamped between the drive gear 18 and the driven gear 22, and the drive gear 18 is rotated in the hour hand rotation direction opposite to the above, thereby causing the gear to rotate. Can be made to penetrate the drawing hole while biting into the outer wall of the hollow rod. All hollow rods can be penetrated into the ground G by adding the appropriate length of hollow rods for extension.

When the hollow rod is directly inserted into the extraction hole by using the rod extraction hole, it is considered that earth or sand is flowing into the extraction hole, and a greater resistance is applied than when the hollow rod is extracted. In this case, as described above, if the axial direction of the rotary arm 20 (the direction of the line connecting the rotary shaft 21 and the rotary shaft 23) is set to be slightly inclined in the direction of the drive gear 18 at the locked position, as shown in FIG. When the rod penetrates, the gear easily bites into the outer wall of the hollow rod, so that the hollow rod can be smoothly penetrated even if the resistance is somewhat high.
The hollow rod can be pulled out in the same manner as the rod 203.

In the case of a ground sample collection survey, for example, the extraction device 10 according to the present embodiment can be used in a ground sample collection method disclosed in Japanese Patent Application Laid-Open No. 2011-226157.
In this ground sample collection method, a collection rod provided with a lid that can be opened and closed at the window opening formed on the side wall is used. The collection rod is penetrated to the required depth of the ground, and the lid is slightly inserted. By rotating the sampling rod about the axis in the opened state, the ground sample is scraped off by the lid, and is stored in the storage unit and collected.

  In the same manner as in the case of the hollow rod, the extraction rod 10 can be used to penetrate the extraction hole into which the rod 203 has been extracted to collect a ground sample. In this case, it is necessary to rotate the sampling rod about one rotation around the axis. The sampling rod can be rotated manually using a tool such as a pipe wrench. Since the collection rod is in a state of being inserted into a previously formed drawing hole, it can be rotated relatively easily by a tool such as a pipe wrench. The extraction of the collection rod can be performed in the same manner as described above.

  In the above-described embodiment, the pulling device 10 is configured such that the drive gear 18 side is fixed and the driven gear 22 side is moved toward and away from the drive gear 18. However, the drive gear 18 side is moved relative to the driven gear 22. You may make it move by moving. Or depending on the case, it is good also as a mechanism in which both the drive gear 18 and the driven gear 22 mutually contact / separate.

DESCRIPTION OF SYMBOLS 10 Pull-out device 12 Drive motor 13 Base 14 Support plate 15 Bolt 16 Rotating shaft 17 Reducer 18 Drive gear 19 Control part 20 Rotating arm 20a Abutting surface 21 Rotating shaft 22 Driven gear 23 Shaft 25 Coil spring 26 Lock mechanism 27 Eccentric cam 27a Cam surface 30 Support shaft 31 Handle 32, 33 Stopper 35 Introduction member 37 Bolt 38 Positioning member 203 Rod

The present invention relates to an automatic drawing / penetrating device for a ground investigation rod from the ground .

The present invention has been made to solve the above-mentioned problems, and the object of the present invention is to reduce the size and simplification, and can be used separately from the Swedish sounding test apparatus, and can be used for other test methods. The object is to provide an automatic drawing / penetrating device for the ground investigation rod that can be removed from the ground.

In order to achieve the above object, the present invention comprises the following arrangement.
That is, the automatic pull - out / penetration device from the ground for the ground investigation rod according to the present invention includes a base, a drive gear rotatably provided on the base, and the drive gear in the forward rotation direction and the reverse rotation direction. a rotatable drive motor separable therefrom provided for the drive gear, with the driving gear when approached, the rods penetrated the ground used for ground survey by clamping, the rod outer wall An automatic extraction / penetration device for a ground investigation rod comprising a driven gear capable of biting into the ground and pulling the rod out of the ground, wherein the driven gear rotates about the rotation axis around the base. The driven gear is mounted on a freely movable pivot arm so as to be able to contact and separate from the drive gear, and the driven gear approaches the drive gear at a position where the rod is clamped. Lock machine to lock the movement An eccentric cam having an eccentric cam surface which is provided rotatably about a support shaft provided on the base and presses the rotating arm; and the eccentric cam is disposed on the support shaft. A lever that rotates about the center of the rotating arm and a stopper with which the handle abuts at a locked position of the driven gear beyond a maximum pressing position of the rotating arm in the direction of the driving gear by the eccentric cam surface. When the ground investigation rod is separately inserted into the ground, in order to make the drive gear and the driven gear easily bite into the outer wall of the rod, at the position where the movement of the driven gear is locked by the lock mechanism, The direction of the axis of the rotation arm connecting the rotation axis of the rotation arm and the rotation axis of the driven gear is set so as to incline toward the drive gear. And wherein the door.

It is preferable to provide a guide member for guiding the movement of the rod .

According to the present invention, there is provided an automatic drawing / penetrating device from a ground for a ground investigation rod that can be miniaturized and simplified, can be used separately from a Swedish sounding test device, and can be diverted to other test methods. it can. Further, since the drive gear and the driven gear rotate while biting into the side surface of the rod, the rod can be reliably pulled upward. Further, when another ground surveying rod is inserted into the extraction hole using the rod extraction hole, the direction of the axis of the rotation arm (the direction of the line connecting the rotation axis and the rotation axis) is set at the lock position. ) Is slightly inclined in the direction of the drive gear, so that when the rod penetrates, the gear can easily bite into the outer wall of the rod, and the rod can penetrate smoothly.

Claims (6)

The base,
A drive gear provided rotatably on the base;
A drive motor capable of rotating the drive gear in the forward direction and the reverse direction;
A ground investigation rod comprising a driven gear provided so as to be able to contact and separate relative to the drive gear and capable of sandwiching a ground investigation rod between the drive gear and the drive gear when approaching. Automatic drawing device from the ground.   2. The lock mechanism according to claim 1, wherein the driven gear is provided so as to be able to contact and separate from the drive gear, and the driven gear locks the movement of the driven gear at a position close to the drive gear. Automatic pulling device from the ground of the described ground investigation rod.   The driven gear is mounted on a rotation arm provided on the base so as to be rotatable about a rotation axis, and when the rotation arm rotates, the driven gear contacts and separates from the drive gear; 3. The automatic pulling device from the ground for a ground investigation rod according to claim 2, wherein the lock mechanism is a lever mechanism having an eccentric cam surface that locks the rotation by pressing the rotation shaft.   The automatic pulling-out device from the ground of the ground investigation rod according to any one of claims 1 to 3, further comprising a guide member for guiding the movement of the rod.   A ground survey method characterized in that, in a Swedish sounding test, a rod penetrating into the ground is pulled out of the ground using the automatic pull-out device for the ground survey rod from the ground according to any one of claims 1 to 4.   After the rod is pulled out of the ground, another ground investigation rod is inserted into the hole from which the rod is pulled out by rotating the drive gear in the reverse direction using the automatic pulling device as it is. The ground survey method according to claim 5, wherein another ground survey is performed.

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