JP2799909B2 - How to install lock bolt retaining material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for installing a lock bolt retaining member.

[0002]

2. Description of the Related Art When a rock bolt is driven upward into a roof or the like of a tunnel, or is driven almost horizontally on a side wall, the bolt may slide out or the mortar may flow down. It may be. In this case, in the method of drilling first and inserting the lock bolt later,
Simply by attaching the flange-shaped check member to the bolt, the bolt can be prevented from sliding out and the mortar or the like from flowing down. However, such a check member cannot be applied to a system in which a hole is drilled with a lock bolt and the hole is left as it is in the hole. Therefore, in the drilling and installation method using the lock bolt as described above, there is no effective method for preventing the bolt from slipping out and the mortar or the like from flowing down.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. In a system in which a hole is drilled with a lock bolt and the lock bolt is left as it is in the drilled hole, the method is directed upward or downward. It is an object of the present invention to provide a method of installing a lock bolt retaining member that can effectively prevent a bolt from sliding out of a substantially horizontal drilled hole or flowing down mortar or the like.

[0004]

That is, the present invention provides a lock bolt having a thread groove formed on a peripheral surface thereof, an inner cylindrical portion which matches the thread groove of the lock bolt, and an outer peripheral portion extending from the cylindrical portion. After applying the rotation, impact and propulsion forces to the lock bolts by means of a driving device, using the retaining material consisting of the wings and the protruding blades, Stop, align the tubular part of the retaining material with the peripheral surface of the lock bolt, start driving the bolt again, and when the blade of the retaining material abuts against the wall surface of the hole, lock bolt Is stopped, and only the reverse direction is provided to the direction in which the thread groove is engraved, and only the retaining member is advanced to a predetermined position and installed, and the locking bolt retaining member is installed.

[0005]

DESCRIPTION OF THE INVENTION Hereinafter, the present invention will be described in detail. <A> Structure of the driving device (FIGS. 1 and 2) FIGS. 1 and 2 show an example of the driving device for the lock bolt 1. FIG. The driving device includes a guide cell 2 on which a lock bolt 1 is mounted, a drifter 21 slidable on the guide cell 2 and mounted on the tail end of the lock bolt 1 to apply rotation and impact force. It is composed of a gripper 22 attached to the tip and gripping the lock bolt 1. As shown in FIG. 4, for example, the structure of the gripper 22 is configured such that two openable and closable arms 23 are mounted on the guide cell 2, and the lock bolt 1 can be held between the two arms 23. <B> Shape of Lock Bolt (FIGS. 1 and 2) As the lock bolt 1, a screw groove 11 is engraved on the peripheral surface. A drill bit 12 is attached to the tip of the lock bolt 1. The outer diameter of the tip of the bit 12 is designed to be substantially equal to the maximum outer diameter of the blade portion 32 of the retaining member 3 described later. <C> Shape of retaining member (FIG. 3) The retaining member 3 includes a cylindrical portion 31 and a blade portion 32 as shown in FIG. The cylindrical portion 31 is a cylindrical body having a diameter slightly larger than the diameter of the lock bolt 1, and has a slit 33 formed in the axial direction. The cylindrical portion 31 has an inner surface shape that matches the thread groove 11 of the lock bolt 1. For example, it is conceivable that the protrusions 34 are intermittently or continuously provided in a spiral shape so as to coincide with the screw grooves 11. Wings 32
Is a plate member or the like which is extended from the cylindrical portion 31 to the outer periphery and protrudes therefrom. For example, as shown in FIG. 3, a structure in which a plurality of plates are formed in a trumpet shape from one end of the tubular portion 31 may be considered. <D> Installation of lock bolt (FIGS. 1, 4, and 5) As shown in FIG. 1, the lock bolt 1 is mounted on the guide cell 2, the drifter 21 is mounted on the tail end, and the tip is a gripper. By 22, it is held in a loose fit state. At this time, the fourth and fifth
As shown in the drawing, the retaining member 3 is grasped by the grasping tool 22, and the lock bolt 1 is disposed so as to penetrate the cylindrical portion 31 of the retaining member 3. Since the diameter of the cylindrical portion 31 is larger than the diameter of the lock bolt 1, a gap 4 is provided between the inner and outer peripheral surfaces of the two.
Is formed. Therefore, the lock bolt 1 is grasped in a loosely fitted state, and does not hinder the propulsion of the lock bolt 1 at all. In this state, the drifter 21 is actuated to apply a rotational force and a propulsive force to the lock bolt 1 to drive the lock bolt 1 to the vicinity of the tail end thereof. In addition, lock bolt 1
At the time of reconnection, for example, the drifter 21 is once removed and retreated, but in the case of an upward operation, the lock bolt 1 may fall off. Therefore, although not shown, a small jack or the like is attached to the tip of the guide cell 2, and the lock bolt 1 can be pressed by the jack in a direction perpendicular to the drilled hole to prevent falling. <E> Matching of retaining material (FIGS. 6 and 7) After the rock bolt 1 is driven to the vicinity of the tail end, the drifter 21 is stopped. Next, as shown in FIG. 6, the cylindrical portion 31 of the retaining member 3 is moved by the arm 23 of the gripper 22.
Is compressed, and the screw groove 11 of the lock bolt 1 and the projection 34 of the cylindrical portion 31 are aligned with each other, and the two are integrated. Then, the drifter 21 is operated again, and the driving of the lock bolt 1 is restarted. At this time, the retaining member 3 moves forward together with the lock bolt 1. <F> Advance and installation of the retaining material (FIG. 8) As shown in FIG. 8, when the blade 32 of the retaining material 3 abuts against the hole wall 5, the propulsion of the lock bolt 1 is stopped. And give only rotation on the spot. The rotation direction is opposite to the direction in which the thread groove 11 is engraved. That is, a right-handed rotation is given for a left-handed screw and a left-handed rotation is given for a right-handed screw. Then, the blade 32 of the retaining member 3 abuts against the hole wall 5, and only the lock bolt 1 rotates in a state where the rotation is restricted by the peripheral friction. Will advance in the hole. Thus, the retaining member 3 is advanced in the hole to the predetermined position, and the installation is completed.

[0006]

[Other Embodiments] The retaining member may have any structure as long as its diameter can be enlarged or reduced. For example, a structure as shown in FIGS. That is, it comprises a tubular portion 6 formed of spring steel having a projection 61 similar to the above on the inner peripheral surface and having a cutting line 62 in the axial direction, and a blade portion 63. When the diameter is reduced, the both ends of the gripping tool 22 provided with the projections 24 on the inner side are shifted by the cutting line 62, and the diameter can be reduced by utilizing the reducing action of the spring steel.

[0007]

Since the present invention has been described above, the following effects can be expected. <A> Conventionally, in a system in which a hole is drilled by a lock bolt and the hole is left as it is in the hole, the check member cannot be applied. On the other hand, according to the present invention, the retaining material can be reliably installed in the hole even if the hole is drilled and installed by the lock bolt as described above. Therefore, it is possible to effectively prevent the bolt from sliding out from the upward or substantially horizontal hole and the mortar or the like from flowing down. <B> At the same time as drilling work with a rock bolt, a retaining material can be installed in the drilled hole. Therefore, it is possible to shorten the operation time for installing the retaining material.

[Brief description of the drawings]

FIG. 1 is a side view of the overall structure of a casting device.

FIG. 2 is a plan view of the entire structure of the driving device.

FIG. 3 is an explanatory view of a retaining material.

FIG. 4 is an explanatory view of a gripping structure.

FIG. 5 is an explanatory view of a casting operation.

FIG. 6 is an explanatory view of a compression method of a retaining material.

FIG. 7 is an explanatory view of a matching state of a retaining material.

FIG. 8 is an explanatory view showing advance of a retaining member.

FIG. 9 is an explanatory view of a retaining member having another shape.

FIG. 10 is an explanatory view of a mounting state of a retaining member having another shape.

Claims (1)

(57) [Claims] 1. A lock bolt having a thread groove formed in a peripheral surface thereof, a cylindrical portion having an inner surface shape corresponding to the screw groove of the lock bolt, and a blade portion extending from the cylindrical portion to the outer periphery to protrude therefrom. With the use of a retaining material, the driving device applies a rotational force, a striking force, and a propulsive force to the lock bolt to drive the bolt to the vicinity of the tail end, and then stops the driving, and stops the tubular portion of the retaining material. With the peripheral surface of the lock bolt, start the driving of the lock bolt again, and when the wings of the retaining material abut against the wall surface of the drill hole, stop the propulsion of the lock bolt and cut the thread groove. A method of installing a lock bolt retaining material, in which only the retaining direction is given and only the retaining material is advanced to a predetermined position for installation.