JPH0128154Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention sprays and applies lubricating oil to the joints such as the shaft of the drifter that is movably mounted on the guide cell of a rock drill. This invention relates to a rod oil supply device for a rock drill.

(Prior Art) In civil engineering works such as mining of mineral resources and tunnel digging, rock drills are used to drill blast holes and the like in bedrock. This rock drill, for example, as shown in FIG.
3 is rotatably attached to the guide cell 33.
A drifter 35 is mounted on the top, which is moved forward and backward along this guide cell 33 by the operation of a drive motor 34.
The drilling rod is connected to a shaft rod 36 which serves as the rotation axis of the shaft.

Drilling work using such a rock drill 30 is performed by first inserting a drill bit 38 at the tip of the shank rod 36.
A perforation rod 37a with attached is connected,
Drifter 35 with drilling rod 37a attached
At the same time, the 3
6 is driven to provide rotational motion and reciprocating motion (impact motion). And the drilling rod 3
If the desired drilling depth cannot be reached by using only the drilling rods 7a, a necessary number of additional drilling rods 37b are successively connected between the shank rod 36 and the drilling rod 37a. At this time, the synchronized lock 3
6 and the perforation rod 37a or 37b,
Alternatively, the connection between one perforation rod 37b and the other perforation rod 37b or 37a is usually made by a male screw joint formed on one side and a female screw joint formed on the other side, or a male screw joint formed on the other side. The threaded connection is made by the female threaded joint of the sleeve joint which is screwed into the joint of the sleeve joint, and the screwed joint is firmly fastened by the rotational movement during drilling. After the drilling operation is completed, the drilling rods 37a and 37b used for drilling are sequentially released from the connected state and recovered in the reverse order of the drilling operation.

By the way, when drilling with the rock drill 30 as described above, it is necessary to smoothly connect the shank rod 36 and the drilling rod 37a or 37b, or to connect one drilling rod 37b with another drilling rod 37b or drilling rod 37a. For,
Furthermore, in order to prevent wear or seizure of the connected joints and to allow smooth loosening of the screw connections at each joint after the completion of the drilling operation, conventionally, the shank rod 36 and the drilling rods 37a and 37b have been installed. Lubricating oil is applied to the joints of the joints prior to their connection. The work of applying lubricating oil to the joints of the shank rod 36 and the drilling rods 37a and 37b used to be done manually, but in recent years, drilling work using rock drills has become faster, automated, and labor-saving. For example, as shown in Japanese Utility Model Application Publication No. 57-156589, there is a rod lubricating device for rock drilling machines that automatically performs the lubricant application work by remote control. being developed. Such an automated rod oil supply device for a rock drill, as shown in FIGS. 5A and 5B, is applied to a rock drill 30 shown in FIG. 4 as an example. The refueling unit 10 is equipped with a refueling nozzle 9 that injects a refueling unit 10, and this refueling unit 10 is equipped with a clamping device 39 provided at the tip of the guide cell 33, for example.
It is arranged in the vicinity of etc. When lubricating oil is applied to the joints Ja of the shank rod 36 and the drilling rods 37a and 37b, the drifter 35 is moved forward and backward, and as shown in FIG. 5A, the male thread of the shank rod 36 is formed. The joint portion Ja is positioned in front of the injection port of the refueling nozzle 9, and as shown in FIG. 5B,
Joint part with male thread of punching rod 37b
Ja is positioned in front of the injection port of the refueling nozzle 9 in accordance with a predetermined order, and compressed air is supplied to the refueling nozzle 9 from a compressed air supply means (not shown), and lubricating oil is supplied to the refueling nozzle 9 (also not shown). Lubricating oil is supplied from each means, and the lubricating oil is sprayed in an atomized state from the oil supply nozzle 9 toward the joint portion Ja.

In a rod oil supply device for a rock drilling machine that performs the lubricating operation in this manner, the lubricating oil required to be applied to each of the joint parts Ja of the shaft rod 36 and the drilling rods 37a and 37b is usually In order to supply the desired amount of lubricating oil to the oil supply nozzle 9, a lubricating oil supply means including a lubricating oil pump that discharges lubricating oil for each application operation is driven for a predetermined period, and the driving of this lubricating oil supply means is started. In synchronization with this, the supply of compressed air from the compressed air supply means to the oil supply nozzle 9 is started, and the compressed air is supplied to the oil supply nozzle 9 for a period longer than the period in which the lubricating oil supply means is driven. However, in such a case, the lubricating oil supply means is driven for a predetermined period,
Even after the amount of lubricating oil required to be applied to the joint part Ja has been supplied to the oil supply nozzle 9 and injected, the lubricating oil remains in excess due to the residual pressure generated within the oil supply pump of the lubricant supply means. The lubricating oil discharged to the oil supply nozzle 9 side due to this residual pressure gradually enters the oil supply nozzle 9 because its discharge pressure is small, and is not atomized and sprayed from the oil supply nozzle 9. The lubricating oil flows out wastefully from the oil supply nozzle 9, resulting in the problem that the rock drill is contaminated and the lubricating oil is wasted.

(Purpose of the invention) In view of the above, the present invention provides a means for supplying lubricating oil to the shaft of the drifter, which is movably mounted on the guide cell of the rock drill, or to the joint of the drilling rod connected thereto. The supplied lubricating oil can be applied by atomizing and spraying the lubricating oil from the oil supply nozzle using compressed air supplied from the compressed air supply means. To provide a rod oil supply device for a rock drilling machine which is capable of preventing lubricant oil from flowing out wastefully from an oil supply nozzle due to residual pressure in a lubricant supply system after a certain amount of lubricant oil has been injected. purpose.

(Structure of the invention) The rod oil supply device for a rock drilling machine according to the invention includes a lubricating oil supply means for discharging lubricating oil, a compressed air supply means for supplying compressed air at a predetermined pressure, and a compressed air supply means for supplying compressed air from the compressed air supply means. Compressed air is supplied through the supply passage, and lubricating oil is supplied from the lubricating oil supply means through the lubricating oil supply passage. It is equipped with a lubricating oil nozzle that atomizes and injects compressed air toward the joint of the shank rod, which is the shaft, or the drilling rod connected to the shank rod. At the same time, a bypass passage is formed to branch from the compressed air supply passage and guide compressed air from the compressed air supply means to the lubricating oil reservoir.

With this configuration, the amount of lubricating oil required to be applied to the joints of the shank rod and the drilling rod is sprayed from the lubricating nozzle in an atomized state, and accordingly, the lubricating oil supply is reduced. After the means operates for a predetermined period, the lubricating oil discharged to the oil supply nozzle side due to the residual pressure is stored in the lubricating oil reservoir, and the lubricating oil stored in the lubricating oil reservoir is transferred to the compressed air supply means. During operation, the compressed air supplied to the lubricating oil reservoir through the bypass passage pushes it toward the oil supply nozzle and is sprayed from the oil supply nozzle toward the joint. Therefore, it is possible to prevent the lubricating oil from flowing out wastefully from the oil supply nozzle, and as a result, it is possible to reduce the amount of lubricating oil consumed, and also to prevent the rock drill from being contaminated by the lubricating oil. can do.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic diagram showing an example of the rod oil supply device for rock drilling machines according to the present invention, and FIGS. 2 and 3 show the main parts of the example shown in FIG.
FIG. 2 is a side view and a front view, partially in cross section, shown in a state where the rock drill 30 is attached to the rock drill shown in the figure. In addition, in FIGS. 1 to 3, parts corresponding to those shown in FIGS. 4 and 5 are given the same reference numerals as in FIGS. omitted.

In this example of the rod oil supply device for a rock drill, lubricating oil is applied to the joint portion Ja in which the male screw of the shank rod 36, the drilling rod 37a, or the drilling rod 37b is formed, which is shown by a dashed line in FIGS. 1 to 3. For application, a refueling unit 10 including a refueling nozzle 9 is attached to a predetermined position of the guide cell 33 and used. The lubricating oil stored in the lubricating oil tank 1 is supplied to the lubricating nozzle 9 from a constant displacement oil pump 2 driven by a pneumatic motor 5 through a lubricating oil supply passage 3. , a lubricating oil tank 1, an oil supply pump 2, a pneumatic motor 5, and a compressed air supply source 11, which will be described later, constitute a lubricating oil supply means. Further, a lubricating oil reservoir 7 having a passage cross-sectional area larger than that of the lubricating oil supply passage 3 is interposed in the lubricating oil supply passage 3 . As shown in detail in FIG.
It is formed by the front end of an adjustment rod 7b which is screwed into the lock nut 7c, and its volume can be changed by loosening the lock nut 7c and rotating the adjustment rod 7b.

Compressed air for atomizing the lubricating oil is also supplied to the oil supply nozzle 9 from a compressed air supply source 11, such as a compressor installed on a work truck of a rock drill, which serves as a compressed air supply means. The compressed air is supplied through a passage 13, and a lubricating oil atomizing electromagnetic switching valve 12 and a variable throttle valve 14 with a check valve are successively installed in this compressed air supply passage 13. From the compressed air supply passage 13 between the oil supply nozzle 9 and the variable throttle valve 14 with a check valve, a bypass passage 15 is connected to the lubricating oil reservoir 7 via a branch pipe 16 (FIGS. 2 and 3). The bypass passage 15 is branched to guide compressed air, and a check valve 17 is interposed in the bypass passage 15 . Here, the above-mentioned oil supply nozzle 9, lubricating oil reservoir 7, bypass passage 15, check valve 17, etc. are connected at their respective connecting portions in a predetermined manner to constitute the oil supply unit 10. is supported at a predetermined position of the guide cell 33 by a support bracket 18 fixed by welding to a rectangular cylindrical member 7a forming a lubricating oil reservoir 7.

Further, from the compressed air supply source 11, in addition to compressed air for atomizing lubricating oil supplied to the oil supply nozzle 9, compressed air for driving the aforementioned pneumatic motor 5 is supplied to the motor driving electromagnetic switching valve. The air pressure is supplied to the pneumatic motor 5 via the air pressure adjusting unit 20 and the air pressure adjusting unit 21. The air pressure adjustment unit 21 includes a filter for removing dust, a pressure adjustment valve for adjusting the air pressure supplied to the pneumatic motor 5, a pressure gauge for pressure inspection, and a slider for the pneumatic motor 5. It is equipped with a lubricator, etc. that mixes atomized lubricating oil into the air flow to lubricate the moving parts.

In this example, the above-mentioned lubricating oil atomizing electromagnetic switching valve 12 and motor driving electromagnetic switching valve 2 are used.
0 switching control, a control unit 25 and an operation panel 27 for operating the control unit 25 are provided. The control unit 25 and operation panel 27 are, for example,
It is installed near the driver's seat of the work trolley, and when the operator operates the lubricant application switch on the operation panel 27, the lubricant application start signal Sa is input from the operation panel 27 to the control unit 25, and the lubricant application starts. Based on the signal Sa, the control unit 25 controls the lubricating oil atomization solenoid switching valve 1.
2, the air control signal Ca for lubricating oil atomization is activated for a predetermined period.
For example, it is output for only 5 seconds, and the motor drive control signal is sent to the motor drive electromagnetic switching valve 20.
Cm is output for a predetermined period, for example, 0.5 seconds.
As a result, the lubricating oil atomizing electromagnetic switching valve 12 is kept in the ON state for, for example, 5 seconds, and the motor driving electromagnetic switching valve 20 is kept in the ON state for, for example, 0.5 seconds.

In the configuration as described above, the synchronized rod 3
6 and the joint part Ja of the drilling rods 37a and 37b
When applying lubricating oil to the shaft, the drifter 35 is moved forward or backward to a predetermined position, and the joint portion Ja of the shaft rod 36, perforation rod 37a or perforation rod 37b is moved as shown in FIG.
It is located in front of the injection port of the refueling nozzle 9. When the lubricating oil application switch on the operation panel 27 is operated, the lubricating oil application start signal Sa is input to the control unit 25, and the lubricating oil application start signal Sa is input to the control unit 25.
5 simultaneously outputs a lubricating oil atomizing air control signal Ca to the lubricating oil atomizing electromagnetic switching valve 12 and a motor driving control signal Cm to the motor driving electromagnetic switching valve 20. As a result, the lubricating oil atomizing electromagnetic switching valve 12 and the motor driving electromagnetic switching valve 20 are switched from the OFF state to the ON state, and the compressed air from the compressed air supply source 11 is transferred to the lubricating oil atomizing electromagnetic switching valve 12. The compressed air is supplied to the oil supply nozzle 9 from the compressed air supply passage 13 via the variable throttle valve 14 with a check valve, for example, for only 5 seconds, and the motor drive electromagnetic switching valve 20 and the air pressure adjustment unit 2
1 to the pneumatic motor 5 for, for example, only 0.5 seconds. As a result, the oil supply pump 2 is driven for 0.5 seconds, sucking the lubricating oil from the lubricating oil tank 1 and discharging it toward the oil supply nozzle 9 side. This discharged lubricating oil passes through the lubricating oil reservoir 7 and enters the oil supply nozzle 9.
From the refueling nozzle 9 to the compressed air supply passage 1
It is atomized by compressed air supplied through 3 and sprayed toward the joint part Ja.

Here, during the 0.5 seconds during which the oil supply pump 2 is driven, the discharge pressure of the oil supply pump 2 is large, so the lubricating oil is quickly supplied to the oil supply nozzle 9 and is injected from the oil supply nozzle 9, and the oil supply pump 2 is activated. After 0.5 seconds of driving has ended, the lubricating oil discharged by the residual pressure generated in the oil supply pump 2 is supplied to the lubricating oil reservoir 7. After the 0.5 second period during which the oil feed pump 2 is driven, the lubricating oil atomization solenoid switching valve 12 continues to be in the ON state (4.5 seconds), and the lubricating oil reservoir 7 is filled with residual pressure. The discharged lubricating oil is pushed out from the lubricating oil reservoir 7 by the compressed air supplied to the lubricating oil reservoir 7 through the bypass passage 15 branched from the compressed air supply passage 13 and is supplied to the oil supply nozzle 9. The lubricating oil is injected from the oil supply nozzle 9 as effective lubricating oil. moreover,
After the lubricating oil atomization electromagnetic switching valve 12 is turned off and the supply of compressed air to the lubricating oil nozzle 9 and the lubricating oil reservoir 7 is completed, that is, 5 seconds have passed since the lubricating oil application work was started. Even later, when the lubricating oil is discharged by the residual pressure of the oil supply pump 2, the lubricating oil discharged by this residual pressure is temporarily stored in the lubricating oil reservoir 7 and used for the next lubricating oil application operation. At times, the lubricating oil reservoir 7 is pushed out by compressed air supplied to the lubricating oil reservoir 7 through the bypass passage 15,
The oil is injected from the refueling nozzle 9 toward the joint Ja.

Therefore, by appropriately adjusting the volume of the lubricating oil reservoir 7 or the amount of restriction of the variable throttle valve with check valve 14, for example, the respective diameters or Even if the lengths are different and the amount of lubricating oil applied is different, both the lubricating oil atomizing electromagnetic switching valve 12 and the motor drive electromagnetic switching valve 20, or the lubricating oil atomizing electromagnetic switching valve 12 is in the ON state, it is possible to apply an appropriate amount of lubricating oil, and it is not only possible to cope with fluctuations in the wind force or wind direction at the site where the application work is performed, but also to reduce the amount of lubricating oil left after the oil supply pump 2 has finished driving. The lubricating oil discharged by pressure is also used effectively, and a situation where the lubricating oil wastefully flows out from the oil supply nozzle 9 is avoided.

(Effect of the invention) As is clear from the above explanation, in the rod oil supply device for rock drilling machines according to the present invention, a lubricant oil reservoir of a predetermined volume is interposed in the lubricant supply passage that leads lubricant to the oil supply nozzle. At the same time, compressed air is supplied to this lubricating oil reservoir through a bypass passage that branches from the compressed air supply passage for lubricating oil atomization, so the lubrication is carried out by the residual pressure generated after the oil supply pump has finished driving. The lubricating oil discharged into the oil sump is pushed out from the lubrication oil sump by the compressed air supplied through the bypass passage, and is injected as effective lubricating oil from the oil supply nozzle, and the supply of compressed air to the oil supply nozzle is stopped. After the lubricating oil is discharged by the residual pressure from the lubricating pump, the lubricating oil is stored in the lubricating oil reservoir, preventing it from flowing out wastefully from the lubricating nozzle, and the effective lubricating oil is removed from the lubricating nozzle when the next lubricating oil is applied. It is injected as.

As a result, the rod oil supply device for rock drilling machines according to the present invention eliminates wasteful consumption of lubricating oil.
It is possible to reduce its consumption, and it is also possible to prevent contamination of the rock drill by the lubricating oil that accompanies the work of applying lubricating oil to the joint of the shaft or drilling rod.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an example of a rod oil supply device for a rock drilling machine according to the present invention, FIG. 2 is a side view including a partial cross section showing the main structure of the example shown in FIG. 1, and FIG. The figure is a front view including a cross section taken along the - line in FIG. 2, showing the main parts shown in FIG. 2, and FIG. 4 is a side view for explaining the general structure and function of the rock drill. FIGS. 5A and 5B are schematic configuration diagrams for explaining a conventional rod oil supply device for a rock drill. In the figure, 1 is the lubricating oil tank, 2 is the oil supply pump, and 3
1 is a lubricating oil supply passage, 5 is a pneumatic motor, 7 is a lubricating oil reservoir, 9 is an oil supply nozzle, 11 is a compressed air supply source, 1
2 is an electromagnetic switching valve for lubricating oil atomization, 13 is a compressed air supply passage, 15 is a bypass passage, 20 is an electromagnetic switching valve for driving a motor, and 25 is a control unit.

Claims (1)

[Scope of utility model registration request] a lubricating oil supply means, a compressed air supply means, compressed air is supplied from the compressed air supply means through the compressed air supply passage, and lubricant oil is supplied from the lubricant oil supply means through the lubricant supply passage; and a lubricating nozzle that atomizes and injects lubricating oil with the compressed air toward the shaft of the shaft of the drifter of the rock drill or the joint of the drilling rod connected to the shaft. A lubricating oil reservoir with a predetermined volume is interposed in the oil supply passage, and a bypass passage is provided that branches from the compressed air supply passage and guides compressed air from the compressed air supply means to the lubricating oil reservoir. A rod oil supply device for rock drilling machines.