JPS6220551Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a device for lubricating the threaded portion of a joint rod for a drilling machine.In particular, when drilling a long hole using a joint rod, the joint threaded portion is firmly fastened. To make it easier to loosen this threaded part and to reduce the wear of the threaded part by substantially automating the work of lubricating the threaded part, thereby reducing the labor of a worker.

When drilling a long hole in a drilling operation, a drill rod is connected to a shank rod using a sleeve, and the rods are then added using sleeves to form a long joint rod.
The connecting screw portions of these are firmly fastened by the impact and rotation of a drilling machine, especially a rock drill.

After drilling the long hole, each joint is loosened by hitting it with a rock drill. At this time, in order to make it easier to loosen the threaded part and to reduce wear on the threaded part, When adding rods, grease is applied to each threaded part of the shank rod and drill rod.

FIG. 1 shows the normal working order. At point a, the rock drill 3 carries the rod and mounts on the guide shell 2, moves forward along the guide shell 2, and drills the ground 1.
Drill a hole in the hole. The rod includes a shank rod 4 attached to a rock drill 3, and a first drill rod 8 attached to the tip thereof via a sleeve 5.

After making the first hole as shown in b using the device in a, the rock drill 3 is separated from the sleeve 5 by separating the shank rod 4 and the sleeve 5 with the shank rod 4 still attached to the rock drill 3 as shown in c. make them retreat.
In this state, apply grease to the threaded portion 4' of the shank rod 4. When separating the threaded portion 4', the sleeve 5 can be tightened by a clamping device of a rod changing device (not shown).

After completion of drilling with the first drill rod 4, when the next drill rod 8 is added by the rod changing device as shown in d, grease is applied to the threaded portion 8' of the drill rod 8.

Grease shall be applied to the threaded portion in the same manner every time a joint rod is added.

Conventionally, the work of applying this grease to threaded parts was done by a worker using a brush or the like to apply the grease to each threaded part, but it was difficult to apply the appropriate amount evenly to the threaded parts, and it was very troublesome as it would get dirty. It's work.

In particular, with the advent of high-performance hydraulic rock drills and the equipment of rod changing devices, the cycle of rod attachment and detachment work has been greatly shortened compared to that of conventional pneumatic rock drills.

Under such conditions, it is necessary for workers to apply grease by hand each time they go up and down between the driver's seat and the rod, causing fatigue to the workers and significantly reducing work efficiency. It is not possible to take advantage of the features of a drilling machine equipped with a rod exchanger.

This invention specifically solves this problem of rod lubrication.

The purpose of this invention is to provide a device that can almost automatically apply lubricating oil during drilling work, and the purpose of this invention is to provide a device that can apply the appropriate amount of oil when necessary by remote control. Another object of the present invention is to provide an apparatus that can reduce the labor of an operator and improve the efficiency of drilling long holes.

That is, this invention is based on a drilling device having a drilling machine 3 reciprocably mounted on a guide shell 2 and equipped with a rod changing device, as in the illustrated embodiment. ′、
A refueling head 6 for refueling the refueling head 8', a moving device 7 for moving the refueling head 6 to the refueling position of the threaded portions 4' and 8', and a refueling head that operates in conjunction with the movement. The present invention is characterized by a switching device that operates a switching valve 13 which works to jet oil from 6, and is configured to be able to supply oil to each threaded portion 4', 8' of the shank rod 4 and drill rod 8 located on the drilling axis. Pertains to a drilling rod oil supply device.

An embodiment of this invention will be described with reference to the drawings.

FIG. 2 shows the external shape of the oil supply device according to this invention, and the main part of the oil supply device is housed in a box body 23.
It is attached to the guide shell 2 via a support arm 24.

4 and 8 are rods for refueling, 6 is a refueling head,
26 is the jetting nozzle. 7 is nozzle 2
This is a pneumatic cylinder as a moving device for bringing the rod 6' closer to the threaded portion of the rod.

FIG. 3 shows a schematic configuration of the oil supply device. The cylinder 7, which is a moving device, is a single-rod, double-acting pneumatic cylinder.A refueling head 6 is attached to the tip of the piston rod 7', and when the piston rod 7' is extended by pressure, the rod for refueling is The threaded portions 4' and 8' of 4 and 8 can be approached. The refueling head 6 is equipped with a nozzle for spraying grease.

Grease is stored in an oil tank 9, connected to a grease pump 10 through an oil pipe 15, and further connected to the oil supply head 6 through an oil pipe 16, so that the grease can be fed.

The pneumatic cylinder 7 has ports A and B, and is connected to the electromagnetic switching valve 11 via pipes 17 and 18. The switching valve 11 is a two-position solenoid valve, and is further connected to an air pressure source 20 from which it receives air pressure.

The electromagnetic switching valve 11 is connected to a power source via a manual switch 12, and switching is performed electrically. Note that the switching of the switching valve 11 may be performed manually or by other means such as pneumatic drive.

In addition, a pilot valve 13 is provided in the middle of pneumatic pipes 21 and 22 that branch from the pneumatic pipe 17 and reach the refueling head 6. The pilot valve 13 is a two-position switching valve, which is attached to the refueling head 6 which moves for refueling and is pushed and switched by an arm 14 which moves with the refueling head 6 to provide air pressure to the refueling head 6. The switching of the pilot valve 13 is not limited to a mechanical method, and may be performed by other means such as a pneumatic method.

Furthermore, a pneumatic pipe line 19 branches from the pneumatic pipe line 17 and reaches an oil pump 10. With this, a pneumatic pump can be used as the oil pump 10, but it is also possible to adopt another drive system for the pump 10 and use the pump 10 for centrally supplying oil to various parts of the drilling equipment during drilling work. can.

Next, the operation will be explained with reference to FIG. 1st
2, when the drill rod 8 and the threaded portions 8' of the shank rod 4 are in the predetermined positions after drilling, when the switch 12 shown in FIG. 3 is turned on, the electromagnetic switching valve is turned on. 11 is switched, and pressure air is supplied to the pneumatic cylinder 7, oil pump 10, and pilot valve 13.

This causes the pneumatic cylinder 7 to operate, and at the same time grease is supplied from the oil pump 10 to the oil supply head 6 via the oil pipe 16. Pressure is supplied from the A port of the cylinder 7 and the piston rod 7'
extends and the oil supply head 6 approaches the threaded portions 4', 8' of the rods 4,8.

Then, the arm 14 moves in conjunction with the movement of the piston rod 7' of the cylinder 7, contacts the pilot valve 13, switches the valve 13, sends pressurized air to the refueling head 6 via the pipe 22, and Grease is jetted from the nozzle and applied to the threaded portions 4' and 8' of the rods 4 and 8.

Since a fixed amount of grease is supplied by the oil pump 10, there is no possibility of overflow or shortage of grease.

Since the grease is applied in the form of a spray, it is possible to brush off dust and other dirt adhering to the threaded portion of the new rod being added.

When the switch 12 is turned off after applying the grease, the electromagnetic switching valve 11 returns to the position shown in the figure, and the pressure air supplied to the A port of the cylinder 7, the oil pump 10, and the oil supply head 6 is cut off. The supply of grease is stopped and the blowing of pressurized air from the refueling head 6 is stopped. At the same time, pressure is supplied to the B port of the cylinder 7, and the refueling head 6 retreats to return to its old position. The above-mentioned operation shall be repeated.

As explained above, according to this invention, there is no need for the operator to directly apply oil to the rods, and an appropriate amount of grease can be applied to the threaded portion of each rod by remote control as necessary. This provides good lubrication and is effective in preventing wear of the threaded portion.

The switching of the electromagnetic switching valve 11 may also be controlled in conjunction with the rod supply stroke of the rod changing device.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a normal work order, FIG. 2 is an external view of the oil supply device according to the invention, and FIG. 3 is a diagram showing a schematic configuration of the oil supply device. In the figure, 2 is the guide shell, 3 is the rock drill, 4 is the shank rod, 4' is the threaded part of the shank rod, 6 is the oil supply head, 7 is the pneumatic cylinder, 8 is the drill rod, 8' is the threaded part of the drill rod, 1
3 is a pilot switching valve.

Claims (1)

[Scope of utility model registration request] A drilling device having a drilling machine reciprocably mounted on a guide shell and equipped with a rod changing device, which includes a refueling head for refueling a threaded portion of the rod, and a refueling head located at a refueling position of the threaded portion. and a switching device that operates a switching valve that works to spout oil from the oil supply head in conjunction with the movement, and a switching device that operates a switching valve that works to jet oil from the oil supply head, A lubrication device for a drilling rod, characterized in that it is configured to enable lubrication.