JP2020094364A - Rock bolt constructing device and rock bolt constructing method - Google Patents

Abstract

To provide a rock bolt construction device and a rock bolt construction method which shorten a time required for construction of a rock bolt and enable a worker to perform a safe work.SOLUTION: A rock bolt construction device includes: a drilling rod support portion 42 that movably supports a drilling rod 41; an injection rod support portion 52 that movably supports an injection rod 51; a rock bolt support portion that movably supports a rock bolt 1; a connection member 31 that connects the drilling rod support portion 42, the injection rod support portion 52, and the rock bolt support portion 62 so that the moving directions of the drilling rod 41, the injection rod 51, and the rock bolt 1 are parallel to each other; and a support member 32 that rotatably supports the connecting member 31 around a rotational axis G that extends in the moving direction of the drilling rod 41, the injection rod 51, and the rock bolt 1. The drilling rod support portion 41, the injection rod support portion 52, and the rock bolt support portion 62 support the drilling rod 41, the injection rod 51, and the rock bolt 1 on the same circle H centering on the rotational axis G.SELECTED DRAWING: Figure 6

Description

The present invention relates to an apparatus and method for constructing a rock bolt on a natural ground.

In the tunnel construction, multiple rock bolts are installed on the peripheral wall of the tunnel for the purpose of stabilizing the ground. When installing the lock bolt, a hole is drilled in the peripheral wall of the tunnel, a filler is injected into the drilled hole, and the lock bolt is inserted. Patent Document 1 discloses a method of constructing a lock bolt using a lock bolt construction device including a guide cell that movably supports a drilling rod and a lock bolt.

The lock bolt construction device disclosed in Patent Document 1 includes a boom connected to a carriage, and the guide cell is attached to the tip of the boom. In addition, a work deck on which a worker can board is provided on the carriage so as to be vertically and horizontally movable. In the rock bolt construction method using this rock bolt construction device, first, the guide cell supporting the drilled rod is moved to the vicinity of the tunnel peripheral wall, and the hole is drilled using the drilled rod. Next, the guide cell supporting the drilling rod is separated from the tunnel peripheral wall, and the work deck on which the worker is placed is moved to the vicinity of the hole formed in the tunnel peripheral wall. The injection rod is manually inserted into the hole by a worker, and the filling material is injected into the hole from the injection rod. Next, the injection rod is pulled out from the hole, and the working deck is separated from the tunnel peripheral wall. Then, the guide cell supporting the lock bolt is moved to the vicinity of the hole into which the filler is injected, and the lock bolt is inserted into the hole.

JP, 2006-70529, A

In the rock bolt construction device disclosed in Patent Document 1, since the worker inserts the injection rod into the hole, it is necessary to manually position the injection rod with respect to the hole. Therefore, it may take time to position the injection rod. Further, in order to ensure the safety of the worker, it is necessary to keep the guide cell as far as possible from the hole when injecting the filling material. Therefore, when inserting the lock bolt into the hole, it is necessary to move the tip of the boom again to align the guide cell with the hole, and it takes time to insert the lock bolt. As a result, the time required for constructing the lock bolt becomes long.

An object of the present invention is to shorten the time required for constructing a lock bolt and to enable a worker to perform a safe work.

The present invention is a rock bolt construction device that drills a hole in a natural ground, injects a filler into the hole, and inserts a rock bolt into the hole, the drilling rod for drilling the hole, and the drilling rod. A hole drilling rod support portion that movably supports the axial direction, an injection rod that injects a filler into the hole, an injection rod support portion that movably supports the injection rod in the axial direction, and a lock bolt for the shaft. The rock bolt support part that movably supports the hole drilling rod support part, the injection rod support part, and the lock so that the moving direction of the drilling rod, the moving direction of the injection rod, and the moving direction of the lock bolt are parallel to each other. A drilling rod support part, and a linking member that links the bolt support part, and a support member that rotatably supports the linking member around a rotary shaft extending in the moving direction of the drilling rod, the injection rod, and the lock bolt, The injection rod support portion and the lock bolt support portion support the drilled rod, the injection rod and the lock bolt on the same circle centered on the rotation axis.

According to the present invention, the time required for constructing the lock bolt can be shortened. Further, it is possible for the worker to perform safe work.

It is a side view of a lock bolt construction device concerning an embodiment of the present invention. It is a perspective view of a boring machine. It is a perspective view of an injection machine. It is a perspective view of an insertion machine. It is an enlarged view of a working unit. It is the figure which looked at the working part along the rotating shaft of a connecting member. FIG. 7 is a view of the working unit viewed along the rotation axis of the connecting member, showing a state in which the connecting member is rotated by an angle α from the state shown in FIG. 6. It is the figure which looked at the working part along the rotating shaft of a connecting member, and shows the state which rotated the connecting member by angle (beta) from the state shown in FIG. It is the figure which looked at the working part concerning a modification along the axis of rotation of a connecting member. It is a perspective view of the insertion machine which concerns on a modification. It is the figure which looked at the working part provided with the insertion machine concerning a modification along the axis of rotation of a connecting member.

Hereinafter, a rock bolt construction device and a rock bolt construction method according to an embodiment of the present invention will be described with reference to the drawings. Here, a rock bolt construction device and a rock bolt construction method for installing the lock bolt on the peripheral wall of the tunnel will be described.

In the NATM method mainly used for construction of mountain tunnels, as shown in FIG. 1, the rock bolt 1 is installed on the peripheral wall W of the tunnel T in order to stabilize the ground. When installing the lock bolt 1, the hole 2 is drilled in the peripheral wall which is the ground of the tunnel T, the filler 3 is injected into the drilled hole 2, and the lock bolt 1 is inserted. The filler 3 is, for example, mortar. The lock bolt 1 may be inserted after injecting the filler 3 into the hole 2 or may be inserted before injecting the filler 3 into the hole 2. When the lock bolt 1 is inserted, the nut 5 is screwed into the rear end portion (rear side) of the lock bolt 1, the fixing plate 4 is arranged on the natural side of the nut 5, and the lock bolt 1 is inserted into the hole 2. .. The fixing plate 4 is pressed against the ground together with the nut 5 mounted on the lock bolt 1 and fixed to the lock bolt 1.

The lock bolt construction device 100 according to the present embodiment is used for drilling the hole 2, injecting the filler 3, and inserting the lock bolt 1. Preferably, the lock bolt construction device 100 is used for inserting the lock bolt 1 in which the fixing plate 4 and the nut 5 are arranged and equipped. That is, the lock bolt construction device 100 performs a series of operations for installing the lock bolt 1 on the ground. Therefore, it is possible to reduce the manual work of the worker in installing the lock bolt 1. As a result, it is possible for the worker to perform safe work.

The rock bolt construction device 100 includes a self-propelled trolley 10, a boom 20 connected to a front portion of the trolley 10, and a working unit 30 connected to a tip of the boom 20. The working unit 30 has a function of drilling the hole 2, a function of injecting the filling material 3, a function of inserting the lock bolt 1, and a function of fixing the fixing plate 4 and the nut 5 together with the lock bolt 1 to the ground. , And perform a series of work to install the lock bolt 1 on the ground.

The trolley 10 is provided with a driver's seat (not shown), and a worker operates the lock bolt construction device 100 from the driver's seat. The boom 20 swings horizontally with respect to the carriage 10 by driving the first boom cylinder 21, and swings vertically with respect to the carriage 10 by driving the second boom cylinder 22. Further, the boom 20 is expanded and contracted by driving the third boom cylinder 23.

The working unit 30 is rotatably and swingably provided at the tip of the boom 20 via the first rotating unit 24 and the second rotating unit 25. Specifically, the first rotating portion 24 is rotatably attached to the tip of the boom 20 about a first axis A1 that extends along the extension and contraction direction of the boom 20, and is driven by a motor (not shown) with respect to the boom 20. Rotate. The second rotating portion 25 is rotatably attached to the first rotating portion 24 about a second axis A2 orthogonal to the first axis A1, and is driven by a motor (not shown) with respect to the first rotating portion 24. Rotate. The working unit 30 is attached to the second rotating unit 25 so as to be swingable about a third axis A3 (an axis orthogonal to the paper surface in FIG. 1) orthogonal to the second axis A2, and is used to drive a motor (not shown). Therefore, it swings with respect to the second rotating portion 25.

As described above, the working unit 30 is rotatable and swingable with respect to the boom 20. Therefore, the direction of the working unit 30 can be changed by rotating and swinging the working unit 30 with respect to the boom 20. The lock bolt 1 can be installed at a desired position and direction by moving the tips of the carriage 10 and the boom 20 and changing the direction of the working unit 30.

The working unit 30 includes a hole drilling machine 40 shown in FIG. 2, an injection machine 50 shown in FIG. 3, and an insertion machine 60 shown in FIG. In addition, in FIG. 1, illustration of the injection machine 50 and the insertion machine 60 is omitted.

As shown in FIG. 2, the boring machine 40 includes a boring rod 41 for boring the hole 2 and a boring rod support portion 42 for movably supporting the boring rod 41.

The drilling rod 41 has a columnar or polygonal drilling rod body 41a and a bit 41b provided at the tip of the drilling rod body 41a. The bit 41b is non-rotatable with respect to the drilling rod body 41a, and is rotated by rotating the drilling rod body 41a around its axis.

The drilling rod support portion 42 is movably mounted on the drilling guide cell 43, the drilling centralizer 44 provided at one end of the drilling guide cell 43, and the drilling guide cell 43. And a hole drilling lifter 45. The hole drilling lifter 45 reciprocates along the hole drilling guide cell 43 by a drive mechanism (not shown).

The drilling drifter 45 supports the base end side of the drilling rod body 41a so that the drilling rod body 41a is substantially parallel to the drilling guide cell 43. Therefore, when the drilling lifter 45 reciprocates along the drilling guide cell 43, the drilling rod 41 reciprocates in the axial direction.

A hole 44a is formed in the hole centralizer 44, and the hole rod body 41a is inserted through the hole 44a. The inner diameter of the hole 44a is substantially equal to the outer diameter of the hole-drilling rod main body 41a, and the movement of the hole-drilling rod 41 is guided by the hole-drilling centralizer 44.

The hole drilling lifter 45 is formed so as to be able to apply a rotational force to the hole drilling rod main body 41a. The hole 2 is drilled in the peripheral wall W of the tunnel T by applying a rotational force to the drilling rod main body 41a by the drilling drifter 45 to rotate the bit 41b while the bit 41b is pressed against the peripheral wall W of the tunnel T. It

The drilling rod 41 may be formed so as to drill the hole 2 by striking the peripheral wall W of the tunnel T in addition to rotation. In this case, the hole-drilling lifter 45 applies a striking force to the hole-drilling rod 41 in addition to the rotational force. The hole 2 is formed in the peripheral wall W by pressing the hole forming rod 41 against the peripheral wall W using the hole forming drifter 45.

As shown in FIG. 3, the injection machine 50 includes an injection rod 51 that injects the filler 3 into the hole 2 and an injection rod support portion 52 that movably supports the injection rod 51.

The injection rod 51 has a cylindrical injection rod body 51a and a side tube 51b provided on the outer peripheral surface of the injection rod body 51a. The side pipe 51b is connected to a pump (not shown) mounted on the carriage 10 (see FIG. 1) via a hose (not shown). The filler 3 supplied from the pump is guided into the injection rod body 51a through the side tube 51b and discharged from the opening 51c formed at the tip of the injection rod body 51a.

The injection rod support portion 52 includes a linear injection guide cell 53, an injection centralizer 54 provided at one end of the injection guide cell 53, and an injection rod delivery mechanism 55 movably mounted on the injection guide cell 53. And have. The injection rod delivery mechanism 55 reciprocates along the injection guide cell 53 by a drive mechanism (not shown).

The injection rod delivery mechanism 55 supports the proximal end side of the injection rod main body 51a so that the injection rod main body 51a is substantially parallel to the injection guide cell 53. Therefore, when the injection rod delivery mechanism 55 reciprocates along the injection guide cell 53, the injection rod 51 reciprocates in the axial direction.

The base end side of the injection rod main body 51a is closed, and the filler 3 introduced into the injection rod main body 51a through the side tube 51b is prevented from flowing out from the base end of the injection rod main body 51a.

A hole 54a is formed in the injection centralizer 54, and the injection rod main body 51a is inserted through the hole 54a. The inner diameter of the hole 54a is substantially equal to the outer diameter of the injection rod body 51a, and the movement of the injection rod 51 is guided by the injection centralizer 54.

As shown in FIG. 4, the insertion machine 60 includes a lock bolt support portion 62 that movably supports the rod-shaped lock bolt 1.

The lock bolt support portion 62 includes a linear insertion guide cell 63, an insertion centralizer 64 provided at one end of the insertion guide cell 63, and a lock bolt delivery mechanism 65 movably mounted on the insertion guide cell 63. And have. The lock bolt delivery mechanism 65 reciprocates along the insertion guide cell 63 by a drive mechanism (not shown).

The lock bolt feeding mechanism 65 detachably supports the rear end of the lock bolt 1 so that the lock bolt 1 is substantially parallel to the insertion guide cell 63. Therefore, when the lock bolt sending mechanism 65 supports the lock bolt 1 and reciprocates along the insertion guide cell 63, the lock bolt 1 reciprocates in the axial direction.

When the lock bolt 1 supported by the lock bolt support portion 62 is installed on the peripheral wall W of the tunnel T, the support of the lock bolt 1 by the lock bolt feeding mechanism 65 is released. When installing another lock bolt 1 on the peripheral wall W of the tunnel T, the other lock bolt 1 is supplied from a bolt magazine (not shown) and is supported by the lock bolt delivery mechanism 65.

A hole 64a is formed in the insertion centralizer 64, and the lock bolt 1 is inserted through the hole 64a. The inner diameter of the hole 64a is substantially equal to the outer diameter of the lock bolt 1, and the movement of the lock bolt 1 is guided by the insertion centralizer 64.

Preferably, the lock bolt 1 is supported by the lock bolt support portion 62 with the fixing plate 4 and the nut 5 inserted and equipped. The fixing plate 4 is arranged between the insertion centralizer 64 and the lock bolt feeding mechanism 65 when the lock bolt 1 is supplied from a bolt magazine (not shown). Therefore, in order to install the fixing plate 4 on the peripheral wall W of the tunnel T, the fixing plate 4 needs to move beyond the insertion centralizer 64.

The insertion centralizer 64 is configured to be retractable with respect to the passage of the fixing plate 4 so as to allow the passage of the fixing plate 4. Specifically, the insertion centralizer 64 has a first member 64b swingably provided on the insertion guide cell 63, and preferably a second member 64c swingably provided on the insertion guide cell 63. .. The first member 64b is capable of supporting the lock bolt 1 and is formed with a notch capable of retracting from the lock bolt 1 when the fixing plate 4 passes. Further, the second member 64c is also formed with a notch capable of retracting from the lock bolt 1. In the state where the insertion centralizer 64 guides the movement of the lock bolt 1 (the state shown in FIG. 4), the hole 64a is formed by the support portion of the first member 64b and the second member 64c. That is, when the insertion centralizer 64 guides the movement of the lock bolt 1, the first member 64b supports the lock bolt 1. Further, the outer periphery of the lock bolt 1 may be surrounded in cooperation with the second member 64c. After the lock bolt 1 is moved to the ground side by the lock bolt sending mechanism 65 and the tip of the lock bolt 1 is inserted into the hole 2, the lock bolt 1 is guided to the hole 2 without the inserting centralizer 64. The first member 64b and the second member 64c of the insertion centralizer 64 swing with respect to the insertion guide cell 63, and the insertion centralizer 64 retracts from the lock bolt 1 to allow the fixing plate 4 to pass therethrough.

The "cutout" is not a ring-shaped member having the hole 54a formed in the injection centralizer 54 described above, but is formed in a part of the ring-shaped member, for example, a C-shaped or U-shaped passage portion. The part that forms the groove is called a "cutout".

Further, the insertion centralizer 64 may include a first member 64b and a second member 64c swingably provided on the first member 64b, as shown in FIGS. 10 and 11. A semicircular cutout is formed in the first member 64b and the second member 64c, and in the state where the insertion centralizer 64 guides the movement of the lock bolt 1 (the state shown in FIGS. 10 and 11), The hole 64a is formed by the notch of the first member 64b and the second member 64c. That is, when the insertion centralizer 64 guides the movement of the lock bolt 1, the first member 64b and the second member 64c cooperate with each other to surround the outer periphery of the lock bolt 1.

By swinging the second member 64c and the first member 64b from the state where the first member 64b and the second member 64c surround the outer periphery of the lock bolt 1, the fixing plate 4 does not interfere with the insertion centralizer 64. .. Therefore, the fixing plate 4 can be moved beyond the insertion centralizer 64, the lock bolt 1 can be inserted into the hole 2, and the fixing plate 4 can be brought close to the peripheral wall W of the tunnel T. By inserting the lock bolt 1 into the hole 2 by the lock bolt feeding mechanism 65, the fixing plate 4 and the nut 5 are pressed against the peripheral wall W of the natural ground.

The lock bolt delivery mechanism 65 may be able to rotate the nut 5 while restraining the rotation of the lock bolt 1. In this case, the nut 5 can be screwed into the male screw portion formed on the outer periphery of the rear end of the lock bolt 1.

As shown in FIGS. 5 and 6, the working unit 30 includes a connection member 31 that connects the drilling rod support unit 42, the injection rod support unit 52, and the lock bolt support unit 62, and a support member that supports the connection member 31. 32, and. Specifically, the connecting member 31 connects the drilling guide cell 43, the injection guide cell 53, and the insertion guide cell 63. In FIG. 5, the injection rod support portion 52 and the lock bolt support portion 62 are not shown.

The support member 32 includes a cylindrical shaft portion 32a, a protruding portion 32b protruding from the outer periphery of the shaft portion 32a in the radial direction of the shaft portion 32a, an arm portion 32c fixed to a tip end surface of the protruding portion 32b, and an arm portion. It has a pair of parallel plates 32d and 32e provided in 32c. The parallel plates 32d and 32e are swingably supported by the second rotating portion 25 (see FIG. 1) about the third axis A3. In other words, the parallel plates 32d and 32e are the support points of the support member 32 and the boom 20 (see FIG. 1).

The connecting member 31 has a cylindrical bearing portion 31a and a protruding portion 31b that protrudes in a fan shape from the outer periphery of the bearing portion 31a in the radial direction of the bearing portion 31a. The shaft portion 32a of the support member 32 is rotatably inserted into the bearing portion 31a, and the connecting member 31 is rotatable with respect to the support member 32 around the shaft portion 32a (around the rotation axis G).

Planes 31c, 31d, and 31e are formed on the protrusion 31b around the rotation axis G in this order. A drilling guide cell 43 is fixed to the flat surface 31c such that the moving direction of the drilling rod 41 is parallel to the rotation axis G. Similarly, the injection guide cell 53 and the insertion guide cell 63 are fixed to the flat surfaces 31d and 31e so that the movement directions of the injection rod 51 and the lock bolt 1 are parallel to the rotation axis G. That is, the moving direction of the hole-drilling rod 41, the moving direction of the injection rod 51, and the moving direction of the lock bolt 1 are parallel to each other and parallel to the rotation axis G.

The centers of the hole 44a of the drilling centralizer 44 and the hole 54a of the injection centralizer 54 are located on a circle H centered on the rotation axis G. Further, in the state where the inserted centralizer 64 surrounds the outer circumference of the lock bolt 1, the center of the hole 64 a of the inserted centralizer 64 is located on the circle H. That is, the drilling rod support portion 42, the injection rod support portion 52, and the lock bolt support portion 62 support the drilling rod 41, the injection rod 51, and the lock bolt 1 on the same circle H. Therefore, by rotating the connecting member 31 while holding the support member 32, the injection rod 51 and the lock bolt 1 can be moved to the position where the drilling rod 41 was (see FIGS. 7 and 8).

The working unit 30 includes a pair of fluid pressure cylinders 34 and 35 as a driving unit that rotates the connecting member 31 with respect to the support member 32. The tube bottoms 34a and 35a of the fluid pressure cylinders 34 and 35 are fixed to each other, and the rod tips 34b and 35b of the fluid pressure cylinders 34 and 35 are connected to the connecting member 31 and the support member 32, respectively. When the pair of fluid pressure cylinders 34, 35 expands and contracts due to the fluid pressure, the connecting member 31 rotates with respect to the support member 32.

The expansion limit and the contraction limit of the fluid pressure cylinders 34 and 35 are the angle α between the center of the hole 44a around the rotation axis G and the center of the hole 54a, and the center of the hole 54a around the rotation axis G and the center of the hole 64a. It is set based on the angle β between and.

Specifically, the extension limit and contraction limit of the fluid pressure cylinder 34 are determined by the expansion and contraction of the fluid pressure cylinder 34 when the fluid pressure cylinder 35 extends to the extension limit (the state shown in FIGS. 6 and 7). 31 is set to rotate by an angle α. Therefore, when the fluid pressure cylinders 34, 35 are extended to the extension limit (the state shown in FIG. 6) and the fluid pressure cylinder 34 is contracted to the contraction limit, the connecting member 31 rotates by the angle α and the drilling rod 41. The injection rod 51 moves to the position where it was (see FIG. 7).

Further, the extension limit and contraction limit of the fluid pressure cylinder 35 are determined by the expansion and contraction of the fluid pressure cylinder 35 when the fluid pressure cylinder 34 is contracted to the contraction limit (the state shown in FIGS. 7 and 8). It is set to rotate β. Therefore, when the fluid pressure cylinder 35 is contracted to the contraction limit and the fluid pressure cylinder 35 is expanded to the extension limit (the state shown in FIG. 7), the fluid pressure cylinder 35 is contracted to the contraction limit. The lock bolt 1 is rotated by the angle β and moved to the position where the injection rod 51 was (see FIG. 7).

Thus, in the working unit 30, the injection rod 51 and the lock bolt 1 can be moved to the position where the drilling rod 41 was located by contracting the fluid pressure cylinders 34 and 35 from the extension limit to the contraction limit. Therefore, the injection rod 51 and the lock bolt 1 can be easily aligned with the hole 2 drilled by the drilling rod 41.

The operation of expanding and contracting the fluid pressure cylinders 34 and 35 to the extension limit or the contraction limit does not require complicated control as compared with the operation of expanding and contracting the fluid pressure cylinders 34 and 35 by managing the stroke amount thereof. Therefore, the injection rod 51 and the lock bolt 1 can be aligned with a simple structure.

The support member 32 has an abutting portion 32f protruding from the shaft portion 32a along the rotation axis G. The abutting portion 32f can protrude more than the drilled rod support portion 42, the injection rod support portion 52, the lock bolt support portion 62, and the connecting member 31. Therefore, the boring rod support portion 42, the injection rod support portion 52, the lock bolt support portion 62, and the connecting member 31 can press the abutting portion 32f against the peripheral wall W of the tunnel T without interfering with the peripheral wall W of the tunnel T. Therefore, the support member 32 can be held against the peripheral wall W. Therefore, the alignment of the injection rod 51 and the lock bolt 1 becomes easier.

The abutting portion 32f is pressed against the peripheral wall W of the tunnel T by driving the first, second and third boom cylinders 21, 22, 23. That is, the first, second and third boom cylinders 21, 22, 23 are pressing portions that press the abutting portion 32f against the peripheral wall W of the tunnel T.

An elastic body such as rubber is attached to the tip of the abutting portion 32f. Therefore, the abutting portion 32f can be brought into close contact with the peripheral wall W, and the support member 32 can be more reliably held against the peripheral wall W. Therefore, the alignment of the injection rod 51 and the lock bolt 1 becomes easier.

The tip of the abutting portion 32f may be formed in a convex shape. In this case, when the abutting portion 32f is pressed against the peripheral wall W of the tunnel T, the abutting portion 32f can bite into the peripheral wall W, and the support member 32 can be held more reliably with respect to the peripheral wall W. it can. Therefore, the alignment of the injection rod 51 and the lock bolt 1 becomes easier.

The abutting portion 32f can freely project and retract with respect to the shaft portion 32a, and the amount of protrusion of the abutting portion 32f can be changed. By changing the protrusion amount of the abutment portion 32f according to the unevenness of the peripheral wall W of the tunnel T, the hole drilling rod support portion 42 and the injection rod support portion in the state where the abutment portion 32f is pressed against the peripheral wall W of the tunnel T. 52, a desired space can be provided between the lock bolt support portion 62 and the peripheral wall W of the tunnel T. Therefore, it is possible to prevent the drilling rod support portion 42, the injection rod support portion 52, and the lock bolt support portion 62 from interfering with the peripheral wall W of the tunnel T when the connecting member 31 rotates.

Further, the drilled rod support portion 42, the injection rod support portion 52, and the lock bolt support portion 62 are rotatable on the side opposite to the parallel plates 32d and 32e with respect to the rotation axis G. Therefore, it is possible to prevent the drilling rod support portion 42, the injection rod support portion 52 and the lock bolt support portion 62 from interfering with the arm 32c, and the drilling rod support portion 42, the injection rod support portion 52 and the lock bolt support portion. The rotation range of the portion 62 can be set wide.

Next, a method of installing the lock bolt 1 using the lock bolt construction device 100 will be described.

First, the ground is excavated using an excavator (not shown), and the tunnel T is formed in the ground. Next, the trolley|bogie 10 is moved and the lock bolt construction apparatus 100 is installed in the desired position in the tunnel T. Next, the working unit 30 is moved to the vicinity of the peripheral wall W of the tunnel T, and the orientation of the working unit 30 is adjusted so that the rotation axis G is substantially orthogonal to the peripheral wall W.

Next, the fluid pressure cylinders 34 and 35 are extended to the extension limit, and the drilling rod 41 is moved to the drilling position. Next, the drilling rod 41 is pressed against the peripheral wall W and rotated to drill the hole 2. The support portion 32 is held by pressing the abutting portion 32f against the peripheral wall W while drilling the hole 2. After the drilling is completed, the drilling rod 41 is extracted from the hole 2.

The abutting portion 32f may be pressed against the peripheral wall W to hold the support portion 32 before pressing the drilled rod 41 against the peripheral wall W. That is, before and after pressing the hole-drilling rod 41 against the peripheral wall W, the abutting portion 32f is pressed against the peripheral wall W to hold the support portion 32. Similarly, the hole drilling rod 41 is rotated back and forth to drill the hole 2.

Next, the fluid pressure cylinder 34 is contracted to the contraction limit, and the connecting member 31 is rotated. As a result, the injection rod 51 moves to the position where the hole-drilling rod 41 was, and the alignment of the injection rod 51 is completed. Next, the injection rod 51 is moved and inserted into the hole 2 deep. Next, the filling material 3 is injected into the hole 2 from the injection rod 51. At this time, by injecting the filler 3 into the hole 2 while pulling out the injection rod 51 from the hole 2, the filler 3 can be spread over the entire hole 2. After the injection is completed, the injection rod 51 is pulled out from the hole 2.

Next, the fluid pressure cylinder 35 is contracted to the contraction limit, and the connecting member 31 is rotated. As a result, the lock bolt 1 moves to the position where the injection rod 51 was, and the alignment of the lock bolt 1 is completed. Next, the lock bolt 1 is moved and inserted into the hole 2. Next, the surrounding of the lock bolt 1 by the insertion centralizer 64 is released, the lock bolt 1 is further inserted, and the lock bolt 1 with which the nut 5 is screwed and the fixing plate 4 are installed on the peripheral wall W. After that, the support of the lock bolt 1 and the nut 5 by the lock bolt sending mechanism 65 is released, and the lock bolt sending mechanism 65 is retracted.

With the above, the installation of the lock bolt 1 is completed. When installing another lock bolt 1 on the peripheral wall W, the lock bolt 1 is supplied to and supported by the lock bolt support portion 62 from a bolt magazine (not shown), and the above steps are repeated.

According to the above embodiment, the following operational effects are exhibited.

The lock bolt construction device 100 includes a connecting member 31 that connects the drilling rod supporting portion 42, the injection rod supporting portion 52, and the lock bolt supporting portion 62, and a supporting member 32 that rotatably supports the connecting member 31. ing. Therefore, a series of work from drilling of the hole 2 to insertion of the lock bolt 1 is performed using the lock bolt construction device 100, which eliminates the need for manual work by a worker.

Further, in the lock bolt construction device 100, the drilling rod support portion 42, the injection rod support portion 52, and the lock bolt support portion 62 are provided on the same circle H centering on the rotation axis G, the drilling rod 41, the injection rod 51, and the injection rod 51. Support the lock bolt 1. Therefore, by rotating the drilling rod support portion 42, the injection rod support portion 52 and the lock bolt support portion 62 around the rotation axis G, the injection rod 51 and the lock bolt 1 are moved to the position where the drilling rod 41 was located. be able to. Therefore, the injection rod 51 and the lock bolt 1 can be easily aligned with the hole 2, and the time required to install the lock bolt 1 can be shortened. In addition, since it is not necessary for the worker to approach each support portion, the work can be performed safely for the worker.

In addition, it is preferable that the injection rod support portion 52 is arranged around the rotation axis G between the hole drilling rod support portion 42 and the lock bolt support portion 62. By arranging in such a manner, the work of drilling the hole 2, injecting the filler 3, and inserting the lock bolt 1 can be performed in order.

Further, the abutting portion 32f is pressed against the peripheral wall W of the tunnel T by driving the first, second and third boom cylinders 21, 22, 23. Therefore, the support member 32 can be held on the peripheral wall W. Therefore, the alignment of the injection rod 51 and the lock bolt 1 becomes easier.

Further, the abutting portion 32f can freely project and retract with respect to the shaft portion 32a, and the amount of protrusion of the abutting portion 32f can be changed. By changing the protrusion amount of the abutment portion 32f according to the unevenness of the peripheral wall W of the tunnel T, the hole drilling rod support portion 42 and the injection rod support portion in the state where the abutment portion 32f is pressed against the peripheral wall W of the tunnel T. 52, a desired space can be provided between the lock bolt support portion 62 and the peripheral wall W of the tunnel T. Therefore, it is possible to prevent the drilling rod support portion 42, the injection rod support portion 52, and the lock bolt support portion 62 from interfering with the peripheral wall W of the tunnel T when the connecting member 31 rotates.

An elastic body such as rubber is attached to the tip of the abutting portion 32f. Therefore, the abutting portion 32f can be brought into close contact with the peripheral wall W, and the support member 32 can be more reliably held against the peripheral wall W. Therefore, the alignment of the injection rod 51 and the lock bolt 1 becomes easier.

When the tip of the abutting portion 32f is formed in a convex shape, when the abutting portion 32f is pressed against the peripheral wall W of the tunnel T, the abutting portion 32f can bite into the peripheral wall W, and the peripheral wall W On the other hand, the support member 32 can be held more reliably. Therefore, the alignment of the injection rod 51 and the lock bolt 1 becomes easier. It should be noted that the tip is formed in a convex shape, the entire tip is formed in a convex shape even if a part of the tip is formed in a convex shape or a plurality of points is formed in a convex shape. May be.

In the lock bolt construction device 100, the injection rod 51 and the lock bolt 1 can be moved to the position where the drilling rod 41 was located by contracting the fluid pressure cylinders 34 and 35 from the extension limit to the contraction limit. Therefore, the injection rod 51 and the lock bolt 1 can be aligned with a simple structure.

Further, the drilled rod support portion 42, the injection rod support portion 52, and the lock bolt support portion 62 are rotatable on the side opposite to the parallel plates 32d and 32e with respect to the rotation axis G. Therefore, it is possible to prevent the drilling rod support portion 42, the injection rod support portion 52 and the lock bolt support portion 62 from interfering with the arm 32c, and the drilling rod support portion 42, the injection rod support portion 52 and the lock bolt support portion. The rotation range of the portion 62 can be set wide.

Although the embodiment of the present invention has been described above, the above embodiment merely shows a part of the application example of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiment. Absent.

In the above embodiment, the case where the lock bolt 1 is installed on the peripheral wall W of the tunnel T has been described, but the lock bolt construction device 100 and the lock bolt construction method are also applied to the case where the lock bolt 1 is installed on the slope of the road. It is possible.

The fixing plate 4 may be manually installed in the ground without using the lock bolt construction device 100. In this case, the insertion centralizer 64 does not have to be formed to allow passage of the fixing plate 4. Further, the lock bolt delivery mechanism 65 may not be formed so as to screw the nut 5 into the lock bolt 1.

In this embodiment, the injection rod 51 and the lock bolt 1 are moved to the position where the drilling rod 41 was located by contracting the fluid pressure cylinders 34 and 35 from the extension limit to the contraction limit. Not limited. For example, the injection rod 51 and the lock bolt 1 may be moved to the position where the drilling rod 41 was located by extending the fluid pressure cylinders 34 and 35 from the contraction limit to the extension limit. Further, as shown in FIG. 9, the fluid pressure cylinder 34 rotates the connecting member 31 by the angle γ about the rotation axis G between the drilling rod 41 and the lock bolt 1 when contracted from the extension limit to the contraction limit. The lock bolt 1 may be configured to be moved (the lock bolt 1 is moved to the position where the drilling rod 41 was). In the case shown in FIG. 9, in order to move the injection rod 51 to the position where the drilling rod 41 was, the fluid pressure cylinder 34 is contracted to rotate the connecting member 31 by the angle γ, and then the fluid pressure cylinder 35 is moved. It extends and rotates the connecting member 31 in the opposite direction by the angle β. In other words, the fluid pressure cylinders 34 and 35, when contracted from the extension limit to the contraction limit or vice versa, rotate around the rotation axis G between the two of the drilling rod 41, the injection rod 51 and the lock bolt 1. The angle may be configured to rotate the connecting member 31.

The present invention is not limited to the form in which the rotation amount of the connecting member 31 is controlled by the extension limit and the contraction limit of the fluid pressure cylinders 34, 35. For example, the rotation amount of the connecting member 31 may be controlled using a stopper capable of limiting the rotation of the connecting member 31, or the extension limit or the contraction limit may be set. Further, the rotation amount may be managed by the stroke amount of the fluid pressure cylinder. When the rotation amount is managed by the stopper or stroke amount, one fluid pressure cylinder may be used to rotate the connecting member 31.

The lock bolt construction device 100 may include a plurality of booms 20, and the working unit 30 may be attached to each boom 20.

100...Lock bolt construction device 1...Lock bolt 2...Hole 3...Filling material 20...Boom 21...First boom cylinder (pressing part)
22...Second boom cylinder (pressing part)
23... Third boom cylinder (pressing part)
31... Connecting member 32... Supporting member 32a... Shaft part 32f... Butting part 34... Fluid pressure cylinder (driving part)
35... Fluid pressure cylinder (drive unit)
41... Drilling rod 42... Drilling rod support 51... Injection rod 52... Injection rod support 62... Lock bolt support G... Rotation axis H... Circle T・・・ Tunnel W ・・・ Surrounding wall

Claims (7)

A rock bolt construction device that drills a hole in the ground, injects a filler into the hole and inserts a lock bolt into the hole,
A drilling rod for drilling the hole,
A drilling rod support portion that movably supports the drilling rod in its axial direction,
An injection rod for injecting the filler into the hole,
An injection rod support portion that supports the injection rod movably in its axial direction,
A lock bolt support portion for movably supporting the lock bolt in its axial direction,
A connection for connecting the drilling rod support part, the injection rod support part and the lock bolt support part so that the moving direction of the drilling rod, the moving direction of the injection rod and the moving direction of the lock bolt are parallel to each other. Members,
A support member that rotatably supports the connecting member around a rotation shaft that extends in the moving direction of the hole drilling rod, the injection rod, and the lock bolt,
The boring rod supporting portion, the pouring rod supporting portion, and the lock bolt supporting portion support the boring rod, the pouring rod, and the lock bolt on the same circle centered on the rotation axis. . The lock bolt construction device according to claim 1, further comprising a pressing portion that presses the support member against the natural ground in a direction along the rotation axis. The support member includes a shaft portion provided on the rotation shaft, and an abutting portion that projects from the shaft portion along the rotation shaft and is pressed against the natural ground by the pressing portion,
The lock bolt construction device according to claim 2, wherein the butting portion is capable of projecting and retracting with respect to the shaft portion. The lock bolt construction device according to claim 3, wherein an elastic body is attached to the tip of the butting portion, or the tip is formed in a convex shape. Further comprising a drive unit that rotates the connecting member with respect to the support member by expanding and contracting,
When the drive unit contracts from the extension limit to the contraction limit or vice versa, the connection is made between the two of the drilling rod, the injection rod, and the lock bolt by the angle about the rotation axis. The lock bolt construction device according to any one of claims 1 to 4, which rotates a member. Further comprising a boom that rotatably supports the support member,
The said hole drilling rod support part, the said injection rod support part, and the said lock bolt support part are rotatable with respect to the said rotating shaft on the opposite side to the support point of the said boom and the said support member. The lock bolt construction device according to any one of 1. A rock bolt construction method using a rock bolt construction device that drills a hole in the ground, injects a filler into the hole and inserts a rock bolt into the hole,
The lock bolt construction device,
A drilling rod for drilling the hole,
A drilling rod support portion that movably supports the drilling rod in its axial direction,
An injection rod for injecting the filler into the hole,
An injection rod support portion that supports the injection rod movably in its axial direction,
A lock bolt support portion for movably supporting the lock bolt in its axial direction,
A connection for connecting the drilling rod support part, the injection rod support part and the lock bolt support part so that the moving direction of the drilling rod, the moving direction of the injection rod and the moving direction of the lock bolt are parallel to each other. Members,
A support member that rotatably supports the connecting member around a rotation shaft that extends in the moving direction of the hole drilling rod, the injection rod, and the lock bolt,
The hole drilling rod support portion, the injection rod support portion and the lock bolt support portion support the hole drilling rod, the injection rod and the lock bolt on the same circle centered on the rotation axis,
The lock bolt construction method,
The support member is moved to a predetermined position, the drilling rod is moved to drill the hole in the natural ground,
The injection rod is aligned with the hole by rotating the connecting member with respect to the support member while holding the support member at the predetermined position, and the injection rod is moved to move the injection rod into the hole. Insert the injection rod and inject the filler from the injection rod into the hole,
The lock bolt is aligned with the hole by rotating the connecting member with respect to the support member while holding the support member at the predetermined position, and the lock bolt is moved to move the lock bolt into the hole. Insert the lock bolt,
Lock bolt construction method.

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