JP2008274617A - Non-open-cut excavation burying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-open-cut excavation burying device for easily and simply adding a cylindrical member when pulling in the cylindrical member. <P>SOLUTION: This non-open-cut excavation burying device has a reamer body 20 of diametrically contracting toward the tip, a rod member 6 connected to a tip part of the reamer body 20, a rod driving means 14 for pulling in the rod member 6, the cylindrical member 24 pulled in by the rod driving means 14, a tip side tool 25 installed on the tip side of the cylindrical member 24 and connected to the reamer body 20 via a connecting mechanism 22, a rear end side tool 27 installed on the rear end side of the cylindrical member 24, and a wire member 88 for releasably connecting the tip side tool 25 and the rear end side tool 27 via the inside of the cylindrical member 24. The rear end side tool 27 has a pushing-in body 84 installed in the cylindrical member and a grip body 86 for pressing the pushing-in body 84 by gripping the wire member 88. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a non-open-cut excavation and embedment apparatus that can embed a cylindrical member without excavating the ground.

  As a non-open cut excavation and burying device for excavating the ground without opening and burying a cylindrical member such as a sheath tube, a drill head for excavating the ground, a rod member connected to the drill head, and a rod member are driven. There are known rod drive means for the above, a reamer body for expanding the excavated excavation hole, and a cylindrical member connected to the base of the reamer body via a coupling mechanism ( For example, see Patent Document 1). In such a non-open excavation burial apparatus, a drill head is used when excavating a buried hole, and this drill head is attached to the tip of the rod member. And a rod drive means propels, rotating a rod member and a drill head, and an excavation hole is formed in this way. Thereafter, when a tubular member as a sheath pipe is embedded in the excavation hole, a reamer body is used instead of the drill head, the tip of the reamer body is attached to the rod member, and a coupling mechanism is connected to the base of the reamer body. A cylindrical member is connected via the. The rod driving means pulls in while rotating the rod member and the reamer body. In this way, the digging hole is expanded by the reamer body, and the tubular member is embedded in the expanded digging hole.

  In such an uncut excavation and burying apparatus, the tubular member is covered with a jacket, and when the reamer body is drawn, the tubular member is drawn by pulling the jacket. When the resistance at the time of drawing becomes large, a large load acts on the jacket and the jacket itself may be damaged. When the jacket is broken, the tubular member cannot be drawn into the excavation hole and embedded.

  In order to solve such a problem, there has been proposed one in which the cylindrical member is not pulled from the front end side but pushed from the rear end side (for example, Patent Document 2). The non-cut excavation burial device includes a front end side jig connected to the reamer body via a connecting mechanism, a cylindrical member having a front end portion attached to the front end side jig, and a rear end part of the cylindrical member. The rear end side jig to be attached and the tension member inserted into the cylindrical member are provided, one end of the tension member is attached to the front end side jig, and the other end is supported by the rear end side jig. The

  In such a non-cutting excavation and embedment device, when the reamer body is moved in the retracting direction, the pulling force from the reamer body is transmitted to the rear end side jig via the coupling mechanism, the front end side jig and the tension member, From this rear end side jig, it acts on the rear end portion of the cylindrical member, and therefore, the rear end side jig acts to push the cylindrical member from the rear end side, and thus the excavation hole while pushing the cylindrical member. Can be inserted and buried.

JP 2004-293141 A JP 2001-31385 A

  In the conventional non-cutting excavation and burying device, the embedded cylindrical members are configured to be connected to each other, and the tensile members are also configured to be connected to each other when the cylindrical members are connected, Although the tubular member and the tension member are configured to be pulled in as the member is pulled in, the conventional device described above has a problem that the work of adding the tubular member and the tension member is complicated. That is, the tension member is provided with a male screw, and a connection jig provided with a female screw is used to connect the tension member. The rear end side jig is a base mounted on the rear end portion of the tubular member. And a washer and a nut acting on the base. To add the tubular member and the tension member, first remove the base together with the washer and nut, then attach the connecting jig to the tension member, attach the tension member to be added, and then connect to the rear end of the tubular member. It is necessary to connect a cylindrical member to be added, and then attach a base to the rear end portion of the joined cylindrical member, and then attach a washer and a nut to a tensile member protruding from the base, which makes the operation complicated. In addition, since screwing with male and female screws is frequently used, the structure becomes complicated and the manufacturing cost of the member increases.

  An object of the present invention is to provide a non-open-cut excavation and embedment device that can easily and simply add a tubular member when the tubular member is retracted.

  The non-cutting excavation embedding device according to claim 1 of the present invention includes a reamer body whose diameter is reduced toward the tip, a rod member connected to the tip of the reamer body, and a rod drive for retracting the rod member. Means, a cylindrical member that is pulled in by the rod driving means, a tip-side jig that is mounted on the tip side of the cylindrical member and is connected to the base of the reamer body via a connecting mechanism, and the cylindrical member Non-open excavation comprising: a rear end side jig mounted on the rear end side; and a wire member that releasably connects the front end side jig and the rear end side jig through the cylindrical member. The embedding device, wherein the rear end side jig includes a pressing body attached to the cylindrical member, and a grip body for gripping the wire member and pressing the pressing body, Accepts the wire member from the side The grip body grips the wire member when the wire member is pulled in the retracting direction, and the grip body grips the wire member when the wire member is returned in the direction opposite to the retracting direction. Can be released.

  Further, in the non-cut excavation embedding device according to claim 2 of the present invention, the pushing body includes an outer member with which the grip body abuts, and an inner member disposed inside the outer member, The member is provided with a holding projection for positioning and holding the cylindrical member, and is provided with a first receiving groove for receiving the wire member, and the outer member for receiving the wire member. The second receiving groove is provided, and a protrusion to be inserted into the first receiving groove of the inner member is provided.

  In the non-open-cut excavation embedding device according to claim 3 of the present invention, the grip body includes a contact member provided with a conical through hole, and a cone inserted into the through hole of the contact member. A plurality of split members constituting a grip body, and the contact member is prevented from falling into the tubular member between the pushing body and the contact member of the grip body. When the push-in member is removed, the fall prevention member closes the opening of the cylindrical member to prevent the contact member from falling.

  Furthermore, in the non-open-cut excavation embedding device according to claim 4 of the present invention, the grip body includes a contact member provided with a conical through hole, and a cone inserted into the through hole of the contact member. A plurality of split members constituting a grip-like grip body, and the contact member is attached with a fall-preventing member for preventing falling into the tubular member. To do.

  According to the non-cutting excavation embedding device according to claim 1 of the present invention, the tip side jig is connected to the reamer body via the connecting member, and the tip side jig is attached to the tip side of the tubular member to be retracted. The rear end side jig is mounted on the rear end side, and the front end side jig and the rear end side jig are releasably connected via the wire member. The retraction force from the reamer main body is transmitted to the rear end side jig via the coupling mechanism, the front end side jig and the wire member, and acts on the cylindrical member from the rear end side jig, thereby The shaped member can be inserted into the excavation hole that has been diameter-excavated while being pushed from the rear end side. Further, the rear end side jig includes a pusher mounted on the cylindrical member and a grip body for gripping the wire member and pressing the pusher, and the pusher is provided with a receiving groove. Therefore, the pusher can be attached to the rear end portion of the tubular member so that the lateral side is inserted. The grip body of the rear end side jig grips the wire member when the wire member is pulled in the retracting direction, and releases the grip state of the wire member when the wire member is returned in the direction opposite to the retracting direction. Therefore, it is possible to easily grip and release the grip by the grip body, and thereby, it is possible to perform the work of adding the cylindrical member easily and in a short time.

  Further, in the non-open excavation excavation embedding device according to claim 2 of the present invention, the first receiving groove is provided in the inner member, and the second receiving groove is provided in the outer member. It can be attached to the rear end of the tubular member so as to be inserted from the side. In addition, since the holding projection is provided on the inner member, the rear end portion of the cylindrical member is held in a predetermined positional relationship with respect to the inner member, and the pusher can be reliably acted on the cylindrical member. . Further, since the first receiving groove of the inner member is provided with a protrusion inserted into the first receiving groove of the outer member, the protrusion can prevent relative rotation between the inner member and the outer member. .

  Further, according to the non-cut excavation and burying device according to claim 3 of the present invention, since the fall prevention member is interposed between the pushing body and the abutting member of the grip body, the fall is removed when the pushing body is removed. The prevention member comes to block the opening of the cylindrical member, and thereby, the fall of the contact member into the cylindrical member can be prevented.

  Furthermore, according to the non-cut-cut excavation embedding device according to claim 4 of the present invention, since the fall prevention member is attached to the abutment member of the grip body, the fall prevention member uses this fall prevention member to The falling into the member can be prevented.

  Hereinafter, with reference to an accompanying drawing, one embodiment of the non-cutting excavation embedding device according to the present invention is described. FIG. 1 is a simplified diagram for explaining excavation work by the non-open excavation burial apparatus according to one embodiment, and FIG. 2 is a simplified diagram for explaining diameter-expanded excavation work by the non-cut excavation burial apparatus of FIG. FIG. 3 is a simplified diagram for explaining the excavation work by the non-open excavation burial apparatus of FIG. 1, and FIG. 4 is a simplified diagram showing a state in which the excavation work by the non-cut excavation burial apparatus of FIG. FIG. 5 is a simplified diagram for explaining the diameter-expanded excavation work (and retraction work) by the non-open excavation excavation embedding apparatus of FIG. 2, and FIG. 6 is a reamer of the non-open excavation excavation embedding apparatus of FIG. 7 is a cross-sectional view showing a body and a configuration related thereto, FIG. 7 is a cross-sectional view showing a front end side jig in the non-cutting excavation and burying apparatus of FIG. 1, and FIG. 9 is a cross-sectional view showing the rear end side jig in a partial cross section, and FIG. It is a perspective view which decomposes | disassembles and shows a side jig | tool, FIG. 10 (a) and (b) is the front view and side view which show the inner member of the rear end side jig | tool of FIG. FIGS. 12A and 12B are a front view and a side view showing the outer member of the rear end side jig of FIG. 8, and FIGS. 12A and 12B show the buffer member of the rear end side jig of FIG. FIG. 13 is a cross-sectional view showing a state when the wire member is returned in the addition work of the tubular member, and FIG. 14 is a push-in body in the addition work of the tubular member. FIG. 15 is a cross-sectional view showing a state in which the tubular member is added in the work of adding the tubular member.

  1 and 2, the non-cutting excavation and burying device 2 shown in the figure includes a drill head 4 for excavating the underground without cutting, and a rod member 6 that is sequentially connected as the drill head 4 is propelled. When the drill hole is formed by propulsion of the drill head 4, the drill head 4 is attached to the rod member 6 on the distal end side.

  For example, the drill head 4 and the rod member 6 are inserted and propelled from the surface of the ground 8 into the ground (in the soil). Rod driving means 14 for driving the drill head 4 via the rod member 6 is installed on the ground, and this rod driving means 14 drives the rod member 6 as required, and the rod member 6 and the drill head 4 are driven. While pushing in a predetermined propulsion direction, it rotates in a predetermined direction around the axial direction. In such a non-open cutting excavation and burying apparatus 2, as the drill head 4 advances, a new rod member 6 is detachably added to the base side thereof, that is, the rod driving means 14 side. 4 is propelled in a predetermined direction, thus forming a borehole. Further, in relation to the rod driving means 14, a drilling fluid supply means 16 for supplying the drilling fluid is provided, and the drilling fluid (for example, muddy water) from the drilling fluid supply means 16 is connected to the rod member 6. The drilling fluid supplied to the drill head 4 is sprayed from the spray nozzle (not shown) of the drill head 4 to the drilling area.

  Further, when the formed excavation hole is expanded in diameter, as shown in FIG. 2, a reamer body 20 is used instead of the drill head 4, and the reamer body 20 is attached to the tip of the connected rod member 6, A cylindrical member 24 is connected to the base of the reamer body 20 via a connecting mechanism 22 (see FIG. 6). A front end side jig 25 is disposed on the front end side of the cylindrical member 24, and the connecting mechanism 22 is connected to the front end side jig 25. A rear end side jig 27 is attached to the rear end side of the cylindrical member 24. The rod driving means 14 also drives the rod member 6 as required when the cylindrical member 24 functioning as a sheath tube is pulled in, and the rod member 6 and the reamer body 20 are pulled in a predetermined pulling direction (the direction opposite to the excavation propulsion direction). And is rotated in the direction opposite to the predetermined direction around the axial direction. As the tubular member 24 is pulled in, the rod member 6 is removed on the base side thereof, that is, on the rod driving means 14 side, and the tubular member 24 is added to the rear end side of the tubular member 24 as described later. Thus, the rod member 6 is removed, and the reamer body 20 is drawn in a predetermined direction while the cylindrical member 24 is added. Thus, the reamer body 20 performs the diameter expansion excavation, and the cylindrical member 24 is retracted. Is done. Also during this diameter expansion excavation, the drilling fluid from the drilling fluid supply means 16 is supplied to the reamer body 20 through the connected rod member 6, and the supplied drilling fluid is an injection nozzle (not shown) of the reamer body 20. )) Is injected into the expanded drilling area. In order to keep the tubular member 26 in a straight line, a retractable gantry 29 is installed on the ground 8, and the added tubular member 26 is drawn into the enlarged diameter excavation hole while being supported by the retractable gantry 29.

Next, with reference to FIGS. 3 to 5 together with FIGS. 1 and 2, a non-cutting method for burying an electrode member for cathodic protection (not shown) using the non-cutting excavation and burying apparatus 2 described above will be described. .
The building 30 includes a building main body 32, and the bottom of the building main body 32 is built on a number of embedded steel members 34 embedded in the ground, and the embedded steel members 34 support the building main body 32. In order to provide the anticorrosion to the buried steel material 34 of the building 30 as described above, an electrode member for cathodic protection is buried and installed as shown in FIGS. The rod driving means 14 and the excavating fluid supply means 16 are mounted on, for example, self-propelled traveling vehicles 38 and 40 and travel to the work site where excavation is performed.

  In order to embed the electrode member for cathodic protection, first, as shown in FIGS. 1 and 3, the rod driving means 14 and the drilling fluid supply means 16 are installed in the vicinity of the periphery of the building 30. The rod member 6 and the drill head 4 are propelled in the direction indicated by the arrow 42 while rotating, and the excavation hole 44 is excavated by the propulsion. And as shown in FIG. 4, it passes between the embedment steel materials 34 embed | buried in the ground, and the lower side of the building main body 32 is horizontal from the one side of the building 30 to the other side (left in FIG.3 and FIG.4) The rod member 6 and the drill head 4 are propelled so that the drill head 4 protrudes from the surface of the ground 8. In this manner, the excavation hole 44 that penetrates the lower side of the building body 32 substantially horizontally is excavated without cutting.

  Next, a reamer body 20 is used in place of the drill head 4, and the reamer body 20 is attached to the tip of the connected rod member 6. The reamer body 20 is connected to the reamer body 20 via a coupling mechanism 22 (see FIG. 7). The tool 25 is connected. In addition, a rear end side jig 27 is attached to the rear end portion of the cylindrical member 24, and the cylindrical member 24 is interposed between the front end side tool 25 and the rear end side jig 27. The front end side jig 25 and the rear end side jig 27 are connected as described later by a wire member 88 (see FIG. 2) extending therethrough. Then, as shown by an arrow 46, the rod member 6 and the reamer body 20 are drawn while being rotated by the rod driving means 14, and the digging hole 44 formed at the time of the drawing is expanded by the reamer body 20, and is described later. As described above, the cylindrical member 24 is drawn into the excavated hole 48 (see FIG. 6) whose diameter has been excavated through the coupling mechanism 22, the front end side jig 25, the wire member 88, and the rear end side jig 27. As described above, the pull-in is performed while removing the connected rod member 6 and adding the tubular member 24 until the tip of the tubular member 24 is exposed to the rod driving means 14 side. Then, the pulled-in cylindrical member 24 is embedded in the enlarged diameter excavation hole 48. Thereafter, the electrode member for cathodic protection (not shown) is inserted so as to be pushed into the embedded cylindrical member 24, and thus the electrode member for cathodic protection can be buried in the ground 8 by non-cutting.

  Next, mainly with reference to FIG. 6 and FIG. 7, the reamer body 20, the coupling mechanism 22, and the tip side jig 25 used when the tubular member 24 is pulled in by the above-described excavated excavation and embedding device 2 will be described. 6 and 7, the reamer body 20 has a substantially conical reamer main body 52, which is reduced in diameter toward the tip (retraction side indicated by an arrow 55), and a connecting portion 54 is provided at the tip. The tip of the rod member 6 is connected to the connecting portion 54 as indicated by a one-dot chain line. Therefore, when the rod member 6 is pulled, the reamer main body 52 is also pulled together. A plurality of blades (not shown) are provided on the outer peripheral surface of the reamer main body 54 at intervals in the circumferential direction, and the excavation hole 44 is diameter-expanded by these blades.

  The connection mechanism 22 that connects the base portion of the reamer body 20 and the distal end side jig 25 includes first and second connection members 62 and 64 that are substantially U-shaped. A first connection member 66 is provided at the base of the reamer body 20, and the first connection member 66 is rotatably mounted relative to the reamer main body 52 via a joint means such as a swivel joint 67. Yes. The first connecting member 66 is provided with a connecting hole, and the first connecting member 62 is connected to the first connecting member 66 by attaching pin members 68 through both end portions and the connecting holes of the first connecting member 66. The

  Further, a connecting portion 70 is provided on one end side (left side in FIGS. 6 and 7) of the distal end side jig 25, and a receiving portion 72 is provided on the other end side (right side in FIGS. 6 and 7). 70 is provided with a connecting hole 74. The 1st connection member 62 and the 2nd connection member 64 are connected so that those U-shaped parts may mutually engage, and the 2nd connection member 64 connected in this way is the connection hole and front-end | tip of the both ends. The pin member 76 is attached through the connection hole 74 of the side jig 25 to be connected to the tip side jig 25.

  Since the reamer body 20 is pulled in the direction indicated by the arrow 55 because it is connected via the connecting mechanism 22 as described above, the tip side jig 25 is also drawn integrally into the diffusion excavation hole 48 accordingly. . In addition, the reamer body 20 is rotated during the retraction, but this turning force is not transmitted to the tip side jig 25 via the coupling mechanism 22, and therefore the tip side jig 25 and the cylindrical member 24 are rotated. It is pulled in the direction shown by the arrow 55 without moving.

  As shown in FIG. 6, a hollow cylindrical cover member 78 is preferably provided in the receiving portion 72 of the distal end side jig 25. The cover member 78 is attached to the base portion of the receiving portion 72 by, for example, an attachment screw 79, extends from the receiving portion 72 toward the base portion of the reamer body 20, and covers the connecting portion 70 and the connecting mechanism 22. Further, a reinforcing ring 80 is provided at the tip of the cover member 78, and the reinforcing ring 80 is provided on the entire circumference of the tip. By providing the cover member 78 in this way, it is possible to prevent earth and sand from entering the gap between the reamer body 20 and the tip side jig 25 (that is, the space in which the coupling mechanism 22 is disposed). it can. Further, since the cover member 78 is provided on the distal end side jig 25 side, the cover member 78 does not rotate even if the reamer body 20 rotates during retraction, and the resistance by the cover member 78 is reduced. Can do.

  The distal end side of the cylindrical member 24 is attached to the distal end side jig 25 as shown in FIG. That is, the receiving portion 72 of the distal end side jig 25 is formed in a hollow cylindrical shape, and defines a cylindrical receiving space 80 that opens to the other end side. The distal end portion of the cylindrical member 24 is attached to the receiving portion 72 by being inserted into the receiving space 80 through the opening. The cylindrical member 24 is formed of, for example, a vinyl chloride (PVC) pipe, and a jacket 82 is mounted in advance so as to cover the outer periphery thereof, and such a cylindrical member 24 is advantageously used.

  Next, the rear end side jig 27 will be described with reference to FIGS. 8 to 12. The illustrated rear end side jig 27 includes a pusher 84 attached to the rear end side of the tubular member 24, And a grip body 86 for pressing the push-in body 84, and the above-described front end side jig 25 and the rear end side jig 27 are configured to be releasably connected via a wire member 88. . The pushing body 84 includes an inner member 90 that is attached to the tubular member 24 and an outer member 92 that is disposed outside the inner member 90. The inner member 90 is formed in a circular shape and has an outer diameter that is somewhat larger than the outer diameter of the tubular member 24. On one side of this inner member 90 (the surface on the cylindrical member 24 side, the left side in FIGS. 8 and 9 and the right side in FIG. 10B), a plurality (in the example shown in the figure) are spaced apart in the circumferential direction. Four holding projections 94 are provided, and as shown in FIG. 8, these holding projections 94 are inserted inside the cylindrical member 24 to position and hold the cylindrical member 24. The inner member 90 is provided with a first receiving groove 96 extending slightly beyond its center from the outer peripheral edge. When the inner member 90 is mounted from the side as will be described later, the wire member 88 is provided with the first receiving groove 96. It is received in the groove 96. Instead of the plurality of pin-shaped holding protrusions 94, ring-shaped holding protrusions may be provided.

  Further, the outer member 92 has a circular shape with the same size as the inner member 90, and on one side thereof (the surface on the inner member 90 side, the left side in FIGS. 8 and 9 and the right side in FIG. 11B). A pair of protrusions 98 are provided at intervals in the radial direction, and extend from the outer peripheral edge somewhat beyond the center to a part facing the pair of protrusions 98 (a part having a positional relationship of 180 degrees). A second receiving groove 100 is provided. When the pusher 84 is mounted on the cylindrical member 24 from the side, the pair of protrusions 98 are inserted into the first receiving grooves 96 of the inner member 90, so that the outer member 92 and the inner member 90 are relative to each other. Rotation is prevented, and the wire member 88 is received in the second receiving groove 100 of the outer member 92, and in the mounted state, the first receiving groove 96 of the inner member 90 and the second receiving groove 100 of the outer member 92. Is located at a different angular position (in this embodiment, an angular position shifted by 180 degrees), and by such a positional relationship, a decrease in strength due to the provision of the first and second receiving grooves 96, 100 is reduced. Can be suppressed. In place of the pair of protrusions 98, protrusions extending in the radial direction may be provided.

  It is preferable that the buffer member 102 is interposed between the inner member 90 of the pusher 84 and the cylindrical member 24. The buffer member 102 is made of, for example, hard rubber. The buffer member 102 is provided with an insertion hole 104 corresponding to each holding projection 94 of the inner member 90 and a third receiving groove 106 corresponding to the first receiving groove 96. It has been. The buffer member 102 is attached to one side of the inner member 90 by inserting each holding projection 94 into the insertion hole 104. In this state, the third receiving groove 106 of the buffer member 102 and the inner member 90 The first receiving groove 96 is aligned, and the wire member 88 is allowed to be received through the first and third receiving grooves 96 and 102.

  Next, the grip body 86 will be described. The illustrated grip body 86 is in contact with the other surface of the outer member 92 (the surface opposite to the inner member 90 side and the right surface in FIGS. 8 and 9). The contact member 108 and a plurality of (three in the illustrated example) split members 112 constituting the grip member 110 for gripping the wire member 88 are configured. The contact member 108 is provided with a conical through hole 114, and the plurality of split members 112 are inserted into the through hole 114 of the contact member 108 in a conical shape so as to cover the wire member 88 in the circumferential direction. In this state, when the wire member 88 is pulled in the pull-in direction, which will be described later, the plurality of split members 112 move so as to bite in the insertion direction relative to the abutting member 108 to move the wire member 88 in the circumferential direction. When the wire member 88 is returned to the direction opposite to the retracting direction, which will be described later, the plurality of split members 112 are moved relative to the abutting member 108 in the disengagement direction. The grip state 88 is released.

  The wire member 88 is composed of, for example, a PC steel wire, and one end thereof is attached to the distal end side jig 25. In this embodiment, an insertion hole 116 is provided in the bottom 114 of the receiving portion 72 of the distal end side jig 25, and one end portion of the wire member 88 is led out to the outside through the insertion hole 116, and the end portion thus led is gripped. The metal fitting 118 is crimped, and the metal fitting 120 is attached to the bottom 114 of the receiving portion 72 so as to lock the grip metal fitting 118. The wire member 88 extends to the rear end side through the tubular member 24. At the rear end side of the tubular member 24, the grip body 86 is releasably gripped by the wire member 88 and transmitted to the distal end side jig 25. The pull-in force is transmitted to the push-in body 84 via the wire member 88 and the grip body 96, and the tubular member 24 is pushed and inserted by the push-in action from the rear end side by the push-in force from the push-in body 84. In addition, an opening 122 for allowing the grip metal fitting 118 and the fitting 120 to be attached is provided in the connecting portion 70 of the distal end side jig 25.

  Next, with reference to FIGS. 13 to 15, the operation of adding the tubular member 24 when the tubular member 24 is retracted will be described. When retracting the tubular member 24, one end portion (tip portion) of the wire member 88 is attached to the tip side jig 25 as described above, and the other end side of the wire member 88 thus attached is to be embedded. The cylindrical member 24 and the contact member 108 of the grip body 86 are extended, and the contact member 108 of the grip body 86 is positioned outside the rear end side of the first cylindrical member 24. The pushing body 84 is mounted between the contact member 108 and the split member 112 is inserted into the insertion hole 104 of the contact member 108. Then, in this state, the rod driving means 14 is driven and the rod member 6 is rotated while being drawn, and thus the reamer body 20 performs the diameter expansion excavation (diameter expansion excavation work) and the cylindrical member 24. Is inserted into the excavation hole 48 that has been subjected to the diameter expansion excavation (retraction operation).

  When the next cylindrical member 24 is inserted after the cylindrical member 24 is inserted in this way, first, the rod driving means 14 is driven in the opposite direction to the retracting direction, and the rod member 6 is opposite to the retracting direction. Move back to. Then, as shown in FIG. 13, the force in the return direction from the rod member 6 is transmitted to the wire member 88 via the reamer body 20, the coupling mechanism 22, and the distal end side jig 25. Thus, the grip body 86 is moved in the returning direction, and thus the pressing state by the pressing body 84 is released. Then, the grip body 86 is moved relative to the contact member 108 to release the grip state by the plurality of split members 112 and release the grip state (Note that the relationship between the contact member 108 and the split member 112 is released). When the combined state is weak, the grip state by the plurality of grip bodies 86 is released by moving the wire member 88 in the returning direction).

  Next, as shown in FIG. 14, the plurality of split members 112 are removed from the contact member 108 of the grip body 86, and the contact member 108 is moved to the rear end side along the wire member 88 in this removed state. Then, the outer member 92 is moved somewhat in the return direction indicated by the arrow 124 to remove the pair of protrusions 98 from the first receiving groove 96 of the inner member 94, and in such a removed state, the outer member 92 is moved radially outward. The second receiving groove 100 of the outer member 92 is removed from the wire member 88. Further, the inner member 90 (the buffer member 102 is attached to the inner member 90) is moved somewhat in the return direction indicated by the arrow 124 in the same manner as the outer member 92, so that a plurality of holding protrusions are provided. 94 is removed from the rear end portion of the tubular member 24, and in this removed state, the first receiving groove 96 of the inner member 90 and the third receiving groove 106 of the buffer member 102 are moved to the outside in the radial direction. Remove from 88.

  Thereafter, as shown in FIG. 15, the cylindrical member 24 to be embedded next is positioned on the rear end side of the cylindrical member 24 inserted into the drilled hole 48, which has been expanded in diameter, and gripped on the rear end side of the cylindrical member 24. The abutting member 108 of the body 86 is positioned. On the contrary, when removing, the inner member 90 and the buffer member 102 are moved in the radial direction from the outside by utilizing the gap between the cylindrical member 24 and the contact member 108, and the first receiving groove 96 of the inner member 90 and The wire member 88 is received in the third receiving groove 106 of the buffer member 102, and in this state, the holding projection 94 of the inner member 90 is inserted into the rear end portion of the cylindrical member 24 to be embedded next. Further, the outer member 92 is moved in the radial direction from the outer side to receive the wire member 88 in the second receiving groove 100 of the outer member 92, and in this state, the pair of protrusions 98 of the outer member 92 are inserted into the first member 90 of the inner member 90. 1 Insert into the receiving groove 96.

  Thereafter, the abutting member 108 of the grip body 86 is abutted against the outer surface of the outer member 92, and the cracking member 112 is further inserted into the insertion hole 104 of the abutting member 108. Thus, as shown in FIG. It can be assembled in the state before removal, and the work of adding the tubular member 24 can be performed easily and easily. When the rod member 6 is pulled in the assembled state, the pulling force from the rod is transmitted to the rear end side jig 27 via the front end side jig 25 and the wire member 88 as described above. The tubular member 24 added by the pushing action by the end-side jig 27 can be inserted into the expanded excavation hole 48 as required.

  As mentioned above, although one Embodiment of the non-cutting excavation apparatus according to this invention was described, this invention is not limited to this Embodiment, A various deformation | transformation thru | or correction | amendment are possible, without deviating from the scope of the present invention.

  For example, when the wire member 88 is pulled back and the gap existing between the pushing body 84 and the grip body 86 is small, the contact between the outer member 92 of the pushing body 84 and the grip body 86 as shown in FIG. The auxiliary member 132 is preferably interposed between the member 108 and the member 108. The auxiliary member 132 is also provided with a fourth receiving groove 134 extending slightly beyond the center from the outer peripheral edge in the radial direction, and the wire member 88 is received in the fourth receiving groove 134 so as to be detachable in the radial direction from the outside. It is attached.

  Further, there is a possibility that the abutting member 108 of the grip body 86 may fall into the inserted and embedded cylindrical member 24 during the extension work of the cylindrical member 24, and in order to prevent such a drop, as shown in FIG. Further, it is preferable that a fall prevention member 142 is interposed between the outer member 92 of the pusher 84 and the contact member 108 of the grip body 86. The fall prevention member 142 is composed of a plate-like member, and an opening 144 through which the wire member 88 is inserted is provided at the center thereof. By providing such a fall prevention member 142, when the pusher 84 (the inner member 90 and the outer member 92) is removed, the fall prevention member 142 closes the opening on the rear end side of the tubular member 24. Thus, the contact member 108 contacts the fall prevention member 142, and the fall of the contact member 108 into the cylindrical member 24 is reliably prevented. The drop prevention member 142 may be provided with a mounting protrusion 146, and a wire-like member 148 as a drop-preventing member may be attached to the attachment protrusion 146. By attaching the wire-like member 148 in this way, The fall prevention member 142 and the contact member 108 can be easily moved along the wire member 88.

  Instead of providing the fall prevention member 142, a wire-like member as a fall prevention member may be directly attached to the contact member 108. In such a configuration, the contact member 108 is temporarily provided. Even if it falls into the cylindrical member 24, the contact member can be easily picked up by pulling the wire-like member.

The simplification figure for demonstrating the excavation operation | work by the non-open cutting excavation embedding apparatus of one Embodiment. The simplification figure for demonstrating the diameter expansion excavation work by the non-open cutting excavation embedding apparatus of FIG. The simplified diagram for demonstrating the excavation operation | work by the non-open cutting excavation embedding apparatus of FIG. FIG. 2 is a simplified diagram showing a state where excavation work by the non-open excavation excavation burying apparatus of FIG. 1 is completed. The simplified diagram for demonstrating the diameter expansion excavation work (and drawing-in work) by the non-open excavation excavation embedding apparatus of FIG. Sectional drawing which shows the reamer body of the non-cutting excavation embedding apparatus of FIG. 1, and a structure relevant to it. Sectional drawing which shows the front end side jig | tool in the non-cutting excavation embedding apparatus of FIG. Sectional drawing which shows the rear end side jig | tool in the non-cutting excavation embedding apparatus of FIG. 1 in a partial cross section. The perspective view which decomposes | disassembles and shows the rear end side jig | tool of FIG. 10A and 10B are a front view and a side view showing an inner member of the rear end side jig of FIG. 11A and 11B are a front view and a side view showing an outer member of the rear end side jig of FIG. FIGS. 12A and 12B are a front view and a side view showing a buffer member of the rear end side jig of FIG. Sectional drawing which shows a state when a wire member is returned in the addition work of a cylindrical member. Sectional drawing which shows the state which removed the pushing body in the extension work of a cylindrical member. Sectional drawing which shows the state which added the cylindrical member in the addition operation | work of a cylindrical member. The disassembled perspective view which shows the 1st modification of a rear end side jig | tool. The disassembled perspective view which shows the 2nd modification of a rear end side jig | tool.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 Non-open cutting excavation embedding apparatus 4 Drill head 6 Rod member 14 Rod drive means 16 Drilling fluid supply means 20 Reamer body 22 Connection mechanism 24 Cylindrical member 25 Front end side jig 27 Rear end side jig 30 Building 70 Connection part 72 Receiving Portion 84 Pushing body 86 Grip body 88 Wire member 90 Inner member 92 Outer member 108 Abutting member 110 Grip member

Claims (4)

A reamer body having a diameter reduced toward the tip, a rod member connected to the tip of the reamer body, a rod driving means for drawing the rod member, a tubular member drawn by the rod driving means, A front end side jig mounted on the front end side of the cylindrical member and connected to the base of the reamer body via a connecting mechanism; a rear end side jig mounted on the rear end side of the cylindrical member; A wire member that releasably connects the front end side jig and the rear end side jig through the inside of a cylindrical member,
The rear end side jig includes a pressing body attached to the cylindrical member, and a grip body for gripping the wire member and pressing the pressing body, and the pressing body includes the wire member. The grip body is configured to grip the wire member when the wire member is pulled in the retracting direction and to return the wire member to the direction opposite to the retracting direction. A non-cut excavation and embedding device characterized in that a grip state of a wire member can be released.   The pushing body includes an outer member with which the grip body abuts and an inner member disposed inside the outer member, and the inner member has a holding projection for positioning and holding the cylindrical member. And a first receiving groove for receiving the wire member, a second receiving groove for receiving the wire member is provided on the outer member, and the inner member has the second receiving groove. The uncut excavation and embedding device according to claim 1, wherein a protrusion to be inserted into the first receiving groove is provided.   A fall prevention member for preventing the abutment member from falling into the cylindrical member is interposed between the pusher and the abutment member of the grip body, and the pusher is removed. 3. The non-cutting excavation and embedment apparatus according to claim 1 or 2, wherein the fall prevention member blocks an opening of the cylindrical member to prevent the contact member from dropping.   The grip body includes a contact member provided with a conical through hole, and a plurality of split members that are inserted into the through hole of the contact member to form a conical grip body. The non-cutting excavation embedding device according to any one of claims 1 to 3, wherein a drop preventing member for preventing the contact member from falling into the cylindrical member is attached.

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