JP2010185193A - Rotary supporting implement to be attached to excavating equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To restrain a rod material of a long-elongated state from being deflected through the self-weight when ground and the like are horizontally bored and excavated over a long distance. <P>SOLUTION: A supporting cylinder member 26 of a rotary supporting implement, which is connected between arbitrary rod members 8 among the plurality of rod members 8 is, abutted on the inner wall of a borehole 3. Then, while a rotary rod member 22 is rotatively supported by a cylinder member 23, the plurality of rod members 8 and the rotary rod member 22 are rotated to transfer the excavating rotation, so as to restrain the rod material of the long-elongated state from being deflected through the self-weight. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a rotary support attached to a drilling device, which is used when a ground or the like is excavated laterally over a long distance.

  In recent years, research to dispose of high-level radioactive waste in the deep underground has been carried out, and underground research facilities for this purpose have been built in two locations in Japan, and research using the underground of mines such as coal mines has also been conducted. Yes. In some cases, very soft sedimentary rocks are used in these studies, and in order to investigate rock properties and water quality around a mine shaft, lateral drilling is required.

  In order to evaluate the environment of a desired place, when a drilling hole is provided in the ground, a drilling hole extending directly below the processing unit is required. For this reason, providing a shaft and providing an excavation hole extending in the lateral direction from the shaft has been conventionally performed (see, for example, Patent Document 1). In the case where the excavation holes are provided in the lateral direction, it has been conventionally practiced to use an apparatus in which a plurality of rod members are connected to the rear end side of the cutting tool because of space limitations (see, for example, Patent Document 2).

  Drilling holes for evaluating the environment from inside the tunnel are often 10cm or less in diameter. In research to clarify the safe range and the range affected by tunnel excavation, such a small diameter There is a need to drill long holes. When the excavation hole becomes long, the rod material which is in a long state by connecting a plurality of rod members may bend by its own weight, and the hole wall of the excavation hole may be scraped by the rod member.

  For this reason, the excavation hole in the middle of the entrance with a limited diameter may become a large-diameter / non-circular shape, and groundwater by a rubber sealing member (packer) installed in hydraulic and water quality tests In addition to the inability to seal, the current situation is that the investigation of the rock properties has been hindered by the need to move the equipment that was planned to be installed at the planned location.

JP-A-2005-270786 JP 2008-175030 A

  The present invention has been made in view of the above situation, and is a rotation support tool attached to an excavation apparatus that can suppress deflection due to the weight of a long rod material when excavating the ground or the like over a long distance in the lateral direction. The purpose is to provide.

  In order to achieve the above object, the rotary support attached to the excavator of the present invention according to claim 1 has a long rod material connected to the excavating means provided with the excavating blade member, and the axis of the rod material. Rotating the excavating blade member by transmitting the surrounding rotation, and suppressing the deflection of the long rod material in the excavating hole when excavating the long excavating hole by rotating the excavating blade member A rotating support member attached to the excavating device, the rotating rod member having a diameter smaller than the diameter of the excavation hole, and a cylindrical member provided so as to rotate relatively freely on the outer periphery of the rotating rod member. It is characterized by that.

  In the present invention according to claim 1, by rotating the rotating rod member with respect to the cylindrical member that is in contact with the inner wall of the excavation hole, excavation rotation is performed while the long rod material is supported by the excavation hole, When excavating the ground or the like over a long distance in the lateral direction, it is possible to suppress deflection due to the weight of the long rod member.

  According to a second aspect of the present invention, there is provided the rotary support attached to the excavator of the present invention, wherein the cylindrical member is supported on the outer periphery of the rotary rod member via a bearing and abuts against the inner wall of the excavation hole. .

  In this invention which concerns on Claim 2, a cylinder member is supported relatively with respect to a rotating rod via a bearing, and a cylinder member can be reliably rotated relatively.

  Moreover, the rotation support tool attached to the excavation device of the present invention according to claim 3 is provided with a plurality of the bearings spaced apart in the axial direction of the rotary rod member, and the shaft between the axial directions of the plurality of bearings. A spacer is provided on the outer periphery of the rotating rod member.

  According to the third aspect of the present invention, the cylindrical member can be rotatably supported relative to the rotating rod member at a plurality of positions in the axial direction via the spacer.

  According to a fourth aspect of the present invention, the rotary support attached to the excavator of the present invention is characterized in that the bearing is a metal bearing.

  In this invention which concerns on Claim 4, the dimension of the radial direction of the rotation support part of a cylinder member can be suppressed to the minimum by using a metal bearing.

  According to a fifth aspect of the present invention, there is provided the rotary support of the present invention attached to the excavator, wherein the cylindrical member is provided with a disc-shaped flange portion, and a flow hole through which fluid flows passes through the disc surface of the flange portion. It is characterized by being formed.

  In the present invention according to claim 5, the disc-shaped flange portion can be brought into contact with the inner wall of the excavation hole, and the discharged fluid can be circulated through the flow hole.

  Further, in the rotary support tool of the present invention attached to the excavator according to claim 6, a plurality of the flange portions are provided in the axial direction of the cylindrical member, and one supporting cylindrical member is fitted over the outer periphery of the plurality of flange portions. It is characterized by that.

  In the present invention according to claim 6, by providing a plurality of flange portions and fitting one support cylinder member, the support cylinder member can be brought into contact with a wide contact area with respect to the axial direction of the excavation hole, The cylindrical member can be rotatably supported without scraping the inner wall of the excavation hole with the flange portion.

  According to a seventh aspect of the present invention, the rotary support attached to the excavator of the present invention regulates the axial movement of the cylindrical member between the end of the cylindrical member and the rotary rod member, and the rotary rod. A restriction bearing capable of rotating the cylindrical member relatively freely with respect to the member is provided, and the restriction bearing receives the rotation support portion and the restriction bearing so that a propulsive force is not loaded on the restriction bearing during boring excavation. A slight gap is provided between the rotating rod member and the rotating rod member.

  In the present invention according to claim 7, since the restriction bearing is provided between the end portion of the cylindrical member and the rotating rod member, the end portion of the cylindrical member and the rotating rod member do not directly contact in the axial direction. The cylindrical member does not rotate with the rotating rod member.

  The rotation support tool attached to the excavation apparatus of the present invention can suppress deflection due to the weight of the long rod member when excavating the ground or the like in the lateral direction over a long distance.

It is a schematic situation figure of the rotation support tool concerning one example of an embodiment of the present invention. It is sectional drawing of a rotation support tool. It is the III-III arrow directional view in FIG.

  FIG. 1 is a schematic view of a rotary support attached to an excavator according to an embodiment of the present invention, FIG. 2 is a situation explaining a cross-sectional structure of the rotary support, and FIG. 3 is III-III in FIG. The state when the line cross section is viewed is shown.

  As shown in FIG. 1, when excavating a long diameter and long excavation hole 3, an apparatus is used in which a plurality of rod members 8 are connected and the excavation members for excavation are provided at the tips of the rod members 8. .

  When the excavation hole 3 is long, the long rod material connecting the plurality of rod members 8 may bend by its own weight, and only the central excavation hole 3 may be scraped by the rod member 8. If the excavation hole 3 in the middle of the entrance with a limited diameter becomes a large diameter / non-circular shape, it becomes impossible to seal with the sealing member, and the evaluation means (work tool) for the part of the planned shape ) May be difficult to select.

  For this reason, the excavator 4 is connected between arbitrary rod members 8 of the plurality of rod members 8, and is a rotary support 21 that rotatably supports a long rod material with respect to the inner wall surface of the excavation hole 3. Is provided.

  The rotation support 21 will be described with reference to FIGS.

  As shown in FIG. 2, a rotating rod member 22 is provided with a male screw a and a female screw b at both ends, and a cylindrical member 23 as a rotation supporting member is attached to the outer periphery of the rotating rod member 22 so that it can rotate independently. It has been. A fluid channel 31 extending in the axial direction is provided at the axial center of the rotating rod member 22, and the fluid channel 31 communicates with the fluid channel of the rod member 8 and is supplied with water for excavation.

  The cylindrical member 23 is supported by the rotating rod member 22 via an oilless metal bearing 24, and two metal bearings 24 are provided at both ends of the rotating rod member 22. The metal bearing 24 is made of a non-lubricated metal containing polymer oil. A spacer 32 is provided between the two metal bearings 24, and the metal bearings 24 are arranged with a gap therebetween. Thereby, the support length of the rotation support part in the axial direction is sufficiently secured.

  By arranging the two metal bearings 24 via the spacers 32, the cylindrical member 23 can be rotationally supported with respect to the rotating rod member 22 at a plurality of positions in the axial direction, and by using the metal bearings 24, It is possible to reliably support the cylindrical member 23 in a freely rotatable manner while minimizing the radial dimension of the rotation support portion of the cylindrical member 23.

  One or three or more metal bearings 24 can be arranged.

  As shown in FIGS. 2 and 3, the cylindrical member 23 is provided with a disk-shaped flange portion 25, and two flange portions 25 are provided in the axial direction of the cylindrical member 23. A plurality of flow holes 29 through which drainage, which is a fluid, circulates are formed on the surface of the flange portion 25 in the circumferential direction so as to penetrate the surface. The diameter of the flange portion 25 is approximately the same as the inner diameter of the excavation hole 3. One support cylinder member 26 is fitted over the outer circumferences of the two flange portions 25, and the support cylinder member 26 comes into contact with the inner wall of the excavation hole 3.

  When the cylindrical member 23 comes into contact with the inner wall of the excavation hole 3 via the support cylindrical member 26, the rotating rod member 22 rotates with respect to the cylindrical member 23, and the cylindrical member 23 is rotatable relative to the rotating rod member 22. It is made the state supported by. By fitting one support cylinder member 26 to the two flange portions 25, the member on the cylinder member 23 side can be brought into contact with the axial direction of the excavation hole 3 with a wide contact area. The cylindrical member 23 can be rotatably supported in a state where the inner wall of the hole 3 is not scraped off by the flange portion 25.

  In addition, it can cope with when the diameter of the excavation hole 3 is changed by replacing | exchanging the cylinder member 23 provided with the flange part 25. FIG.

  Between the male screw a and female screw b at both ends and the end portion of the cylindrical member 23, the axial movement of the cylindrical member 23 is restricted and the cylindrical member 23 is supported rotatably relative to the rotating rod member 22. A bearing 27 is provided as a restriction bearing. A slight gap is provided between the cylindrical member 23 and the rotating rod member 22 that receives the bearing 27 so that no propulsive force is loaded when drilling.

  Since the bearing 27 is provided between the end of the cylindrical member 23 and the rotating rod member 22, the end of the cylindrical member 23 and the rotating rod member 22 are not in direct contact with each other in the axial direction. At the same time, the cylindrical member 23 does not rotate.

  The rotary support 21 described above is connected between arbitrary rod members 8 of the plurality of rod members 8, and excavation is performed in a state where the support cylinder member 26 is in contact with the inner wall of the excavation hole 3. That is, in the state where the support cylinder member 26 is in contact with the inner wall of the excavation hole 3 and the rotary rod member 22 is rotatably supported by the cylinder member 23, the plurality of rod members 8 and the rotary rod member 22 are rotated to rotate the excavation member 5. Drilling rotation is carried out.

  Therefore, when the rod material in the long state is excavated and rotated at the site of the rotation support tool 21 while being supported by the excavation hole 3, the rod material in the long state is excavated when the ground is excavated laterally over a long distance. Deflection due to its own weight can be suppressed. As a result, only the central excavation hole 3 is shaved by the rod material, and the excavation hole 3 is not deformed, so that devices and tools such as a sealing member can be reliably applied.

  When excavation is performed, water is supplied to the excavation member (not shown) through the fluid flow path of the rod member 8 and the fluid flow path 31 of the rotating rod member 22, and muddy water after excavation flows between the rod member 8 and the excavation hole 3. It is discharged to the outside through the gaps between them and the flow holes 29 of the flange portion 25 of the rotary support 21.

  INDUSTRIAL APPLICATION This invention can be utilized in the industrial field | area of the rotation support tool used when excavating a ground etc. to a horizontal direction over a long distance.

  Further, the present invention can be used in the industrial field in which the ground or the like is excavated in the lateral direction over a long distance and the measuring device or the like is installed at a predetermined location.

DESCRIPTION OF SYMBOLS 3 Excavation hole 21 Rotation support tool 22 Rotation rod member 23 Cylinder member 24 Metal bearing 25 Flange part 26 Support cylinder member 27 Bearing 29 Flow hole 31 Fluid flow path 32 Spacer

Claims (7)

The long rod material is connected to the excavating means provided with the excavating blade member, and the rotation of the excavating blade member is excavated and rotated by transmitting the rotation around the axis of the rod material. When excavating a long excavation hole, a rotary support attached to an excavation device that suppresses deflection of the long rod material in the excavation hole,
A rotating rod member having a diameter smaller than the diameter of the excavation hole;
A rotation support tool attached to an excavator, wherein the rotation support member comprises a cylindrical member provided so as to rotate relatively freely on an outer periphery of the rotation rod member. In the rotation support attached to the excavation device according to claim 1,
A rotation support tool attached to an excavation apparatus, wherein the cylindrical member is supported on an outer periphery of the rotation rod member via a bearing and abuts against an inner wall of the excavation hole. In the rotation support attached to the excavation device according to claim 2,
A plurality of the bearings are provided in the axial direction of the rotating rod member, and a spacer is provided on the outer periphery of the rotating rod member between the axial directions of the plurality of bearings. Rotating support attached to the device. In the rotation support attached to the excavation device according to claim 3,
The rotary support attached to an excavator, wherein the bearing is a metal bearing. In the rotation support attached to the excavation device according to claim 4,
A rotary support tool attached to an excavator, wherein the cylindrical member is provided with a disk-like flange portion, and a flow hole through which fluid flows is formed through the disk surface of the flange portion. In the rotation support attached to the excavation device according to claim 5,
A plurality of the flange portions are provided in the axial direction of the tubular member, and one support tubular member is fitted over the outer periphery of the plurality of flange portions. In the rotation support attached to the excavation device according to any one of claims 4 to 6,
Between the end of the cylindrical member and the rotating rod member, the axial movement of the cylindrical member is restricted and the cylindrical member can be rotated relatively freely with respect to the rotating rod member. Bearings are provided,
In the excavator characterized in that a slight gap is provided between the rotation support portion and the rotating rod member that receives the restriction bearing so that no propulsive force is loaded on the restriction bearing during boring excavation. Rotating support to attach.

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