JP6288707B2 - Ground sampling device - Google Patents

Description

  In order to obtain specimens mainly used for indoor mechanical tests, etc., such as clay, sand, pebbles mixed soil, etc., the present invention makes it possible to achieve rational efficiency of work and stable quality from the ground as close to the original ground as possible. The present invention relates to a ground sampling device capable of sampling with high quality.

  Conventionally, when collecting a sample from the ground, a boring hole is formed by a boring device using a core tube equipped with a bit for excavating the ground at the tip of the rod up to the upper position of the ground from which the sample is collected. Pull out the core tube from the bored hole, insert a sample collection device equipped with a sample tube at the tip of the rod into the borehole, and place the sample tube at the bottom of the borehole to the sample collection ground The sample is collected by inserting.

  In such a method, after forming the boring hole, it is necessary to pull out the core tube from the boring hole and to insert the sampling device into the boring hole. In some cases, solid matter may precipitate, and an unsuitable layer may be formed on the top of the collected sample.

  In order to solve this problem, an outer cylinder and a rod which are provided with rotation and propulsion by a boring device, attached to the tip of the outer cylinder and the rod, and provided with a drilling crown and a bit at the lower end. An apparatus comprising: a head device; and a muddy water supply device for supplying muddy water to the head device, wherein the head device is a compound crown / compound that combines a crown of an outer cylinder cylinder for excavation, a bit member, and a sampling tube. It is configured as a bit device, and a mud supply route for excavation work and a muddy water supply route for propelling the sampling tube are switched using a valve rod member as a route for supplying muddy water to the composite crown bit device. Means for excavation with the crown and bit member for excavation and sampling with a sampling tube. Is considered by changing the muddy water supply path. This sampling apparatus is a muddy water supply path for excavation work and muddy water for propelling the sampling tube. Since the supply path is switched using the valve rod member, the muddy water is removed by dropping the swivel head and the top rod after the swivel head and the top rod at the time of switching the path and dropping the valve rod member into the rod from the top rod. Since the supply path can be switched, the swivel head and the top rod must be removed and connected each time the muddy water supply path is switched, and the work is performed at a high place where a workbench or scaffolding is required, and The removal and connection work of the muddy water supply route is time consuming, laborious, and has the disadvantage that it can only be done by skilled personnel. Since the valve stem member is dropped in the supply path, the muddy water supply path cannot be reliably switched by the valve stem member due to solid matter in the muddy water supply path or solid matter attached to the valve stem member. It was.

JP-A-10-205265

  In view of the above-described conventional drawbacks, the present invention switches the working fluid supply path and the working fluid supply path for propelling the sampling tube at the time of excavation work by removing the working fluid supply path and connecting the working fluid. It is an object of the present invention to provide a ground sampling device that can be reliably performed by anyone in a short time and with easy work.

The above and other objects and novel features of the present invention will become more fully apparent when the following description is read in conjunction with the accompanying drawings.
However, the drawings are for explanation only and do not limit the technical scope of the present invention.

In order to achieve the above-mentioned object, the present invention provides a cylindrical rod to which a rotating and propelling action is imparted by a boring device and a working fluid is supplied by a supply device, and the cylindrical rod is provided at the tip of the cylindrical rod. A sample tube attached via a switching valve that slides in the axial direction of the rod of the rod, a piston that slides within the sample tube, and that is located at the tip of the sample tube during excavation, and a tip of the piston An excavation jig attached to the cylindrical rod, an annular key weight capable of switching the switching valve by attaching and dropping so as to cover the outer peripheral portion of the cylindrical rod, one end portion being attached to the piston, and the like The end is located in the cylindrical rod and is attached to the sample tube that communicates with the cylindrical rod and prevents downward sliding. A cylindrical piston rod attached via a locking clamp that is, the tubular rod during drilling, through the tubular piston rod drilled by discharging the working fluid from the drilling jig, given When drilling to the depth, a cylindrical key weight is attached to the cylindrical rod and dropped, and the switching valve is switched to discharge the fluid in the sample tube to the outside. A ground sampling device is constituted by the formed working fluid switching passage.

As is clear from the above description, the present invention has the following effects.
(1) According to the first aspect, the switching valve can be switched by dropping an annular key weight attached so as to cover the outer peripheral portion of the cylindrical rod.
Therefore, it is unnecessary to remove and connect the working fluid supply path as in the prior art, and anyone can easily perform it in a short time.
(2) According to the above (1), the work of attaching the annular key weight to the outer peripheral portion of the cylindrical rod can be performed from the ground without using a work table as in the prior art. It can be done safely in time.
(3) According to the above (1), the annular key weight is attached so as to cover the outer peripheral portion of the cylindrical rod and falls while guiding the cylindrical rod, so that the annular key weight can be pressed against the switching valve. The switching valve can be switched reliably.
(4) After forming the boring hole according to (1) above, the sample tube can be pushed into the ground from the bottom of the boring hole by a series of operations, and the sample can be collected efficiently. A ground sample can be taken with.
(5) In the second aspect, the same effects as in the above (1) to (4) can be obtained, and the attachment and removal of the annular key weight from the cylindrical rod can be easily performed.

Explanatory drawing of the state which has formed the boring hole of the 1st form for implementing this invention. Explanatory drawing of the switching operation | work of the switching valve of the 1st form for implementing this invention. Explanatory drawing of the collection state of the sample of the 1st form for implementing this invention. The principal part expansion explanatory drawing of the 1st form for implementing this invention. The principal part expansion explanatory drawing of the switching state of the switching valve of the 1st form for implementing this invention. Explanatory drawing of the switching valve of the 1st form for implementing this invention. The principal part expansion explanatory drawing of the state which makes the sample tube of the 1st form for implementing this invention protrude. Explanatory drawing of the annular key weight of the 1st form for implementing this invention. Explanatory drawing of the attachment state of the annular key weight of the 1st form for implementing this invention. Explanatory drawing of the state which has formed the boring hole of the 2nd form for implementing this invention. Explanatory drawing of the switching operation | work of the switching valve of the 2nd form for implementing this invention. Explanatory drawing of the annular key weight of the 2nd form for implementing this invention. Explanatory drawing of the state which has formed the boring hole of the 3rd form for implementing this invention. The bottom view of the excavation jig of the 3rd form for carrying out the present invention. The principal part expansion explanatory view of the 3rd form for carrying out the present invention. Explanatory drawing of the state which has formed the boring hole of the 4th form for implementing this invention. The bottom view of the cutting jig of the 4th form for carrying out the present invention. The principal part expansion explanatory drawing of the 4th form for implementing this invention. Explanatory drawing of the state which has formed the boring hole of the 5th form for implementing this invention. The principal part expansion explanatory drawing of the 5th form for implementing this invention. The principal part expansion explanatory drawing of the switching state of the switching valve of the 5th form for implementing this invention. The principal part expansion explanatory drawing of the state which makes the sample tube of the 5th form for implementing this invention protrude.

  Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings.

  In the first embodiment for carrying out the present invention shown in FIG. 1 to FIG. 9, reference numeral 1 denotes a boring hole 2 drilled to a predetermined depth at a ground sampling site, and the switching valve 20 is switched in that state to change the sample tube. 3 is a ground sampling device according to the present invention, in which a sample is collected by pushing 3 into the sampling ground 4. The ground sampling device 1 includes a spindle head 6 for rotating a cylindrical rod 5 for excavation, A chuck member 7 for holding the cylindrical rod 5 in a fixed position, and a support base 9 provided with an elevating device 8 such as a hydraulic cylinder device for moving the chuck member 7 and the spindle head 6 up and down. The drilling device 10 is connected to the excavating cylindrical rod 5 connected to the upper end of the excavating cylindrical rod 5 via the swivel head 11. A hydraulic fluid supply device 12 for supplying a working fluid etc., and a sampling device main body 13 attached to the distal end of the tubular rod 5 for the excavation.

  The sample collection device main body 13 includes a sample tube 3 having a shoe 14 formed at the tip, and a drill bit and a bit inserted at the tip of the sample tube 3 that can be slid within the sample tube 3. Piston 16 to which excavation jig 15 such as a cone with cone and winged cone 15 is attached, and a working fluid is supplied to excavation jig 15 of this piston 16. The part is switched to the non-circular part 5a at the lower end of the excavating cylindrical rod 5, the non-circular piston rod 17 that can only be slid, and the inside that is attached to the upper part of the sample tube 3 in an integrated or fixed state. A cylindrical sampler head 18 to which a switching valve support base 18b in which valve insertion holes 18a and 18a are formed is fixed, and a tip of the sampler head 18. Of the switching valve head 20a and the sampler head 18 in which a rod insertion hole 19 is formed in which the cylindrical rod 5 for excavation can be slid downward and the central portion of the excavating cylindrical rod 5 passes through the central portion. A switching valve 20 as shown in FIG. 6, which includes switching valve members 20 b and 20 b inserted into the switching valve insertion holes 18 a and 18 a of the switching valve support base 18 b, and the switching valve member 20 b of the switching valve 20 are formed. The switching valve 20 is formed in the passage 20c, the cylindrical rod 5 or the piston rod 17, and the switching valve support base 18b, and the switching valve 20 protrudes upward from the sampler head 18. A working fluid supply that communicates the cylindrical rod 5 and the piston rod 17 by bypassing the working fluid blocking piece 21. When the switching valve 20 formed in the passage 22 and the switching valve 20 and the sampler head 18 is pushed down, the working fluid supply passage 22 is blocked by the working fluid blocking piece 21, and the inside of the sample tube 3 A working fluid discharge passage 23 for discharging the fluid into the bore hole 2 from the switching valve insertion hole 18a of the switching valve support base 18b, the discharge passage 20d of the switching valve member 20b of the switching valve 20, and the discharge passage 20e of the switching valve support base 18b. And an annular key weight 24 attached to the outer peripheral portion of the excavating cylindrical rod 5 and used for switching the switching valve 20.

  The excavating cylindrical rod 5 and the switching valve support 18b of the sampler head 18 are fixed by screwing.

  Further, during excavation, the noncircular piston rod 17 engaged with the noncircular portion 5a at the lower end of the excavating cylindrical rod 5 can be integrally rotated and moved in the axial direction, and the switching valve 20 is switched. Thus, a locking clamp (not shown) is provided to allow the non-circular piston rod 17 to enter the cylindrical rod 5 for excavation.

  As shown in FIG. 8, the annular key weight 24 is attached to the excavating cylindrical rod 5 without separating the working fluid supply device 12. A C-shaped annular key weight main body 26 having a notch 25 formed on the side surface of the circular key weight main body 26, a locking member 27 covering the entire notch 25 of the circular key weight main body 26, Hinge member-like locking fittings 28, 28 attached to both ends of the stopper 27, and the locking key 27 side of the annular key weight main body 26 detachably locked to the locking fittings 28, 28. It is comprised with the attachment means 30 which consists of the latching pieces 29 and 29 attached to the site | part located in this.

  In the ground sampling device 1 having the above-described configuration, the sampling device main body 13 and the working fluid supply device 12 are connected to the cylindrical rod 5 for excavation of the boring device 10 and positioned on the sampling ground. A boring hole 2 is formed as shown in FIG.

  At this time, the working fluid supplied by the working fluid supply device 12 is discharged to the excavation part from the cylindrical rod 5 for excavation, the working fluid supply passage 22 of the switching valve 20, the piston rod 17 and the excavating jig 15 and discharged. The working fluid and excavated material are discharged from the borehole 2.

  When the boring hole 2 is drilled to a predetermined depth, as shown in FIG. 2, the circular key weight body 26 is pushed into the excavating cylindrical rod 5 at the lower position of the chuck member 7 of the boring device 10, and the notch 25 The ring key weight main body 26 and the lock tool 27 are integrated with the attaching means 30 and dropped to drop the ring key weight 24 along the tubular rod 5 for excavation. At the upper end of the switching valve 20, the switching valve 20 is moved downward to close the working fluid supply passage 22 with the working fluid blocking piece 21 and open the working fluid discharge passage 23 as shown in FIG.

  When the cylindrical rod 5 for excavation is pushed in this state, the sample tube 3 is pushed into the ground to be collected, and the piston 16 slides into the sample tube 3 as shown in FIG.

  At this time, the working fluid in the sample tube 3 is discharged into the boring hole 2 from the working fluid discharge passage 23, and the sampling ground 31 can be collected smoothly.

  When the collection ground 31 enters the sample tube 3, the ground sample can be collected by removing the sample collection device main body 13 from the boring hole 2 and taking out the collection ground 31 in the sample tube 3.

[Different forms for carrying out the invention]
Next, different modes for carrying out the present invention shown in FIGS. 10 to 22 will be described. In the description of the different embodiments for carrying out the present invention, the same components as those in the first embodiment for carrying out the present invention are denoted by the same reference numerals, and redundant description is omitted.

  In the second embodiment for carrying out the present invention shown in FIGS. 10 to 12, the main difference from the first embodiment for carrying out the present invention is an annular key weight 24A. Since the upper part of the cutout portion 25 of the annular key weight main body 26 can be opened and closed by a locking tool 27A attached by a hinge member 32, a ground sampling device 1A using such an annular key weight 24A is provided. In addition, the same operational effects as those of the first embodiment for carrying out the present invention can be obtained, and the attaching operation of the annular key weight 24A can be easily performed.

  The third embodiment for carrying out the present invention shown in FIGS. 13 to 15 is mainly different from the first embodiment for carrying out the present invention in that the working fluid is moved outward from the position of three equal parts. A drilling jig 15A is used which can form a boring hole 2A larger than the outer diameter of the sample tube 3 in which the oblique injection hole 33 is formed so as to be discharged to the working fluid discharged from the oblique injection hole 33. In this respect, even with the ground sampling device 1B configured using the excavation jig 15A, the same operational effects as those of the first embodiment for carrying out the present invention can be obtained.

  The fourth embodiment for carrying out the present invention shown in FIGS. 16 to 18 is mainly different from the first embodiment for carrying out the present invention in that the tip is not rotated when the tip is rotated clockwise. A plurality of bit plates 35, 35 that protrude outward from the outer peripheral portion and are attached by pivot pins 34 that are accommodated inside or inside the outer peripheral portion during counterclockwise rotation, in the embodiment of the present invention. , 35, 35, and the ground sampling apparatus 1C configured using such a drilling jig 15B is used in the first embodiment for carrying out the present invention. The same effect as the embodiment can be obtained, and a boring hole 2A larger than the outer diameter of the sample tube 3 can be formed by rotating the excavating cylindrical rod 5 clockwise.

  The fifth embodiment for carrying out the present invention shown in FIGS. 19 to 22 is mainly different from the first embodiment for carrying out the present invention in that the sample tube 3 is replaced with a sampler head 18 and a switching valve 20. When the switching valve 20 is switched, the working fluid from the tubular rod 5 for excavation is supplied to the sample tube 3 and the rotary cutting. The working fluid supplied from the cylindrical rod 5 for excavation can be obtained even in the ground sampling device 1D configured as described above in that the working fluid discharge passage 23A leading to the inside of the outer pipe 37 is formed. By supplying the excavating jig 15 through the working fluid supply passage 22 and switching the switching valve 20, the sample tube 3 is pushed into the collection ground through the working fluid discharge passage 23A, and the sample is removed. It can be taken, the same effects as the first mode for carrying out the present invention is obtained.

  In the embodiment of the present invention, the drilling of the boring hole 2A and the extrusion of the sample tube 3 are performed while supplying the working fluid to the cylindrical rod 5 for excavation.

  INDUSTRIAL APPLICABILITY The present invention is used in the industry for manufacturing a ground sampling device used when collecting a ground sample.

1, 1A, 1B, 1C, 1D: Ground sampling device,
2, 2A: Boring hole, 3: Sample tube,
4: Sampling ground 5: Cylindrical rod for excavation,
6: spindle head, 7: chuck member,
8: Lifting device, 9: Support base,
10: Boring device, 11: Swivel head,
12: Working fluid supply device, 13: Sampling device body,
14: shoe, 15, 15A, 15B: excavation jig,
16: piston, 17: piston rod,
18: Sampler head, 19: Rod insertion hole,
20: switching valve, 21: working fluid blocking piece,
22: Working fluid supply passage, 23, 23A: Working fluid discharge passage,
24, 24A: Ring key weight,
25: Notch, 26: Ring key weight body,
27, 27A: Locking tool, 28: Locking bracket,
29: locking piece, 30: attachment means,
31: Collection ground 32: Hinge member
33: oblique injection drilling hole, 34: pivot pin,
35: Bit plate, 36: Arc-shaped bit,
37: Outer tube for rotary cutting.

Claims (2)

Rotating and propelling action is given by the boring device, and the working rod is supplied with the working fluid by the cylindrical rod, and switching to slide the tip of the cylindrical rod in the axial direction of the cylindrical rod A sample tube attached via a valve, a piston that slides in the sample tube, is located at the tip of the sample tube during excavation, a drilling jig attached to the tip of the piston, and the cylinder An annular key weight that can switch the switching valve by attaching and dropping so as to cover the outer periphery of the cylindrical rod, one end is attached to the piston, and the other end is located in the cylindrical rod Through a locking clamp attached to the sample tube that communicates with the cylindrical rod and prevents downward sliding. A cylindrical piston rod attached, the tubular rod during drilling, through the tubular piston rod drilled by discharging the working fluid from the drilling jig, when boring to a predetermined depth, the A working fluid switching passage formed in a switching rod and a cylindrical rod or piston rod that can attach and drop an annular key weight to a cylindrical rod and switch the switching valve to discharge the fluid in the sample tube to the outside. A ground sampling device characterized by comprising: The circular key weight has a C-shaped circular key weight body in which a cut-out portion into which a cylindrical rod enters a side surface, a locking member that covers the entire or upper portion of the cut-out portion of the circular key weight main body, 2. The ground sampling apparatus according to claim 1, further comprising attachment means for attaching a locking tool to the annular key weight main body so as to be detachable or openable.

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