JP2014001546A - Drilling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To set an appropriate engine speed according to a drilling condition and an operation mode.SOLUTION: This drilling machine has a control part (25) that determines a drilling condition based on detection information from drilling condition detection means (21 and 22) and according to the determination, sets a corresponding control mode among a plurality of control modes, and also in accordance with an operation input condition from operation input means (31), controls an engine speed so as to be an engine speed regulated by the current-set control mode.

Description

  The present invention relates to a drilling machine such as a crawler drill used for drilling work at a site such as a mine, quarrying, or civil engineering work.

  This type of drilling machine transmits striking and rotation from a drifter mounted on a guide shell to a bit attached to the tip of the rod, and feeds the drifter to form a hole. In drilling work, the operator grasps the operating status of each operating mechanism of the drifter visually and audibly, judges the rock quality of the drilled object, and adjusts the operating conditions of each operating mechanism of the drifter according to the rock quality (For example, refer to Patent Document 1).

By the way, usually, the engine speed control at the time of blow or flushing with this type of drilling machine is performed by automatically increasing the engine to the rated speed, so that the compressor and the hydraulic pump directly connected to the engine are controlled. The rotational speed is increased, thereby increasing the discharge amount of compressed air necessary for flushing and the pressure oil for operating the striking mechanism.
However, depending on the drilling conditions or depending on the required specifications (drilling hole diameter, drilling length), the drilling machine may be operated with a reduced drilling capability. In that case, the engine is operated at an engine speed lower than the rated speed without increasing the engine to the rated speed. Since driving at such a low rotational speed has a good effect on fuel consumption, it can be used as an energy-saving driving.

Japanese Patent Laid-Open No. 10-61368

However, when the drilling machine is operated by lowering the engine speed below the rated speed, the engine speed is often adjusted based on the ability to crush the rock. If the engine speed is adjusted to the capacity to crush the bedrock, the amount of air discharged from the compressor also decreases. Therefore, for example, in the operation mode in which compressed air for flushing the inside of the drill hole is blown, the crushed rock powder may not be completely discharged from the drill hole, and it becomes difficult to finish the hole to the target drill hole length. There was a problem.
Accordingly, the present invention has been made paying attention to such problems, and an object thereof is to provide a drilling machine capable of setting an appropriate engine speed in accordance with a drilling situation and an operation mode. .

  In order to solve the above-described problem, a drilling machine according to an aspect of the present invention is a drilling machine including a striking mechanism and a flushing mechanism, and detects a feed pressure and a feed speed of the striking mechanism. The condition detection means, the operation input means for inputting the operation of the operator, the detection information from the drilling condition detection means and the operation information from the operation input means are input to control the engine speed and A control unit that stores a plurality of control modes that define the number of rotations, the control unit determines a drilling situation based on detection information from the drilling situation detection unit, and according to the determination, A corresponding control mode is set from a plurality of control modes, and the engine speed is set based on the operation input state from the operation input means. And controlling the engine speed prescribed in.

  Here, in the drilling machine according to one aspect of the present invention, the control unit, as the control mode, includes a normal control mode in which the engine is rotated at a rated rotational speed, and a rotation speed at which the engine is lower than the rated rotational speed. A first energy-saving control mode for rotating at a number, and a second energy-saving control mode for rotating the engine at either the rated speed or a speed lower than the rated speed, and is currently set When the control mode is the normal control mode and the first energy saving control mode, the engine speed that defines the engine speed in the currently set control mode regardless of the operation input information from the operation input means. When the currently set control mode is the second energy saving control mode, the operation input state from the operation input means is a batting When the operation and the flushing operation or the striking operation, the engine is rotated at a rotation speed lower than the rated rotation speed, and the operation input state from the operation input means is only the flushing operation, It is preferable to rotate the engine at the rated speed.

  Further, in the drilling machine according to one aspect of the present invention, when the control unit determines that the currently acquired feed speed is not higher than the previously acquired feed speed based on the detection information, It is preferable to set the control mode to the normal control mode, and in the normal control mode, control is performed so that the engine speed is maintained at the rated speed in any operation input state.

  Further, in the drilling machine according to one aspect of the present invention, the control unit, based on the detection information, the currently acquired feed rate is higher than the previously acquired feed rate and the currently acquired feed pressure is immediately before. When it is determined that the pressure is not lower than the acquired feed pressure, the control mode is set to the first energy saving control mode, and in the first energy saving control mode, based on the selected operation input state, In any operation input state, it is preferable to control the engine speed to an engine speed lower than the rated speed.

  Further, in the drilling machine according to one aspect of the present invention, the control unit, based on the detection information, the currently acquired feed rate is higher than the previously acquired feed rate and the currently acquired feed pressure is immediately before. When it is determined that the feed pressure is lower than the acquired feed pressure, the control mode is set to the second energy saving control mode. In the second energy saving control mode, the operation input state is set based on the selected operation input state. When only the flushing operation is performed, the engine speed is controlled to the rated speed, and when the operation input state is to perform flashing while hitting or hitting, the engine speed is controlled to an engine speed lower than the rated speed. It is preferable to do.

  According to the present invention, the control unit determines the drilling status based on the detection information from the drilling status detection means, sets the corresponding control mode from a plurality of control modes according to the determination, and inputs the operation. Based on the operation input state from the means, the engine speed is controlled to the engine speed defined in the currently set control mode, so an appropriate engine speed is set according to the drilling situation and the operation mode. be able to.

1 is an overall perspective view of a crawler drill that is an embodiment of a drilling machine according to an aspect of the present invention. It is the schematic diagram of the side view explaining the drifter part mounted in the guide shell of the crawler drill of FIG. 1 so that back-and-forth movement was possible. It is a block diagram explaining the structure which concerns on the control part of the crawler drill of FIG. It is a flowchart of the mode switching process which a control part performs. It is a flowchart of the 1st energy saving control mode in the mode switching process of FIG. It is a flowchart of the 2nd energy saving control mode in the mode switching process of FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate.
As shown in FIG. 1, this hydraulic crawler drill 1 is provided with a boom 8 on a traveling carriage 5 provided with a track frame 2 so as to be able to turn up and down, and a drifter 10 is mounted at the tip of the boom 8. A guide shell 11 is supported so as to be tiltable and swingable. As shown in FIG. 2, the drifter 10 includes a striking mechanism 13, a rotating mechanism 9, and a flushing mechanism 14. A shank rod 3 is inserted in front of the drifter 10, a rod 4 having a predetermined length is connected to the shank rod 3 via a sleeve 7, and a bit 6 is attached to the tip of the rod 4.

The drifter 10 is moved forward and backward by being fed by a feed mechanism 12 provided in the guide shell 11, and transmits the striking and rotation to the bit 6 via the shank rod 3 and the rod 4 to generate rocks. Drilling is possible. When the drill hole length is longer than the length of the rod 4, it is necessary to add and recover the rod 4, so that the guide shell 11 has a rod replacement for adding and recovering the rod 4 as shown in FIG. A device 17 is equipped.
The flushing mechanism 14 shown in FIG. 2 supplies compressed air to the tip of the rod 6 to discharge the dust in the hole. As shown in FIG. 1, a dust pot 36 is provided at the tip of the guide shell 11 so as to cover the hole mouth, and the dust pot 36 is connected to a dust collector (not shown) so that the discharged dust is captured. Be collected.

Further, as shown in FIG. 1, the traveling cart 5 includes a hydraulic drive unit 15 for driving the rotation mechanism 9, the feed mechanism 12, the striking mechanism 13, and the rod exchange device 17, and the compressed air to the flushing mechanism 14. And an air driving unit 16 for supplying the air. Further, the traveling carriage 5 is provided with a feed speed detector 21 and a feed pressure detector 22 as drilling state detecting means for detecting the feed pressure and feed speed by the drifter 10 striking mechanism 13.
An operator cabin 24 is provided on the carriage 5, and an input unit 31 including an operation lever (not shown) for manual drilling operation is provided as an operation input means in the vicinity of the driver's seat in the operator cabin 24. Yes. When performing a drilling operation, the operator inputs operation information necessary for a desired drilling hole from the input unit 31 serving as an operation input unit.

  A control unit 25 is provided in the operator cabin 24 on the carriage 5. A computer having storage, calculation, and control functions is used for the control unit 25. The storage device of the control unit 25 includes not only the drilling data required for drilling control but also the above-described drilling state detection means. A program that determines the drilling status based on the detected information, data for multiple control modes that define the engine speed, and engine speed that is controlled by the currently set control mode. A program for this purpose is stored in advance.

  In the present embodiment, the control unit 25 includes a normal control mode for rotating the engine at a rated rotational speed (2200 rpm in the present embodiment) as a plurality of control modes for defining the rotational speed of the engine, and the engine more than the rated rotational speed. A first energy saving control mode for rotating at a low speed (2000 rpm in the present embodiment) and a second energy saving control mode for rotating the engine at a rated speed or a speed lower than the rated speed are stored. Yes.

  In response to an operation input from the input unit 31, for example, when the drilling start is commanded, the control unit 25 drives the drifter 10 forward based on the drilling procedure program data stored in the control unit 25. In addition, when the operation information is input from the input unit 31, the control unit 25 sets an operation input state according to the input. As the operation input state, for example, a state in which only a flushing operation is input, a state in which only a batting operation is input, or a state in which an operation for performing flushing while striking is input is set.

  Then, the control unit 25 executes the mode switching process in the drilling process, and based on the detection data (detection information) from the feed speed detector 21 and the feed pressure detector 22, the rotation resistance increase, bit hole clogging, etc. According to the determination, the corresponding control mode is set from the plurality of control modes, and the engine speed is currently set based on the operation input state from the operation input means. Control to engine speed specified in control mode. As a result, the optimum drilling operation according to the rock quality is performed at an appropriate engine speed.

  More specifically, during the drilling stroke, detection data (detection information) from each of the feed speed detector 21 and the feed pressure detector 22 is stored in the control unit 25 at any time (for example, every 0.5 seconds). Then, as shown in FIG. 4, when the drilling process is performed, the process proceeds to step S1, and first the drilling is started in the normal control mode in which the engine is rotated at the rated speed (2200 rpm), and then the process proceeds to step S2. To do. In step S2, the feed speed information stored in the control unit 25 is read as detection information, and in the subsequent step S3, the currently acquired feed speed is higher than the feed speed acquired immediately before based on the detection information. When it is determined that there is not (No), the process proceeds to step S5, and when it is determined that it is not (Yes), the process proceeds to step S4. In step S5, the normal control mode is maintained and the process returns to step S2. Here, in the normal control mode, control is performed so that the engine speed is maintained at the rated speed in any operation input state.

  In step S4, the feed pressure information stored in the control unit 25 is read as detection information. In the subsequent step S6, based on the detection information, the currently acquired feed pressure is lower than the feed pressure acquired immediately before. When it is determined that there is no (No), the process proceeds to step S8, and when it is determined that it is not (Yes), the process proceeds to step S7. In step S8, the control mode is set to the first energy saving control mode, and the process proceeds to step S9. On the other hand, in step S8, the control mode is set to the second energy saving control mode, and the process proceeds to step S9.

  In step S9, the information on the feed speed stored in the control unit 25 is read as detection information. In the subsequent step S10, based on the detection information, the currently obtained feed speed is lower than the feed speed obtained immediately before. If not (No), the process returns to step S2, and if not (Yes), the process proceeds to step S11. In step S11, the control mode is set to the normal control mode, and the process returns to step S2.

Next, the first energy saving control mode in step S8 and the second energy saving control mode in step S7 during the mode switching process will be described.
In the first energy saving control mode in step S8, as shown in FIG. 5, when the operation input information from the operation input means is monitored and it is determined that the batting operation is input in the shifted step S81 (Yes), The process proceeds to step S82. If it is determined that this is not the case (No), the process proceeds to step S83. In step S82, regardless of whether or not a flushing operation is input, the process proceeds to step S84, and the process is returned by rotating the engine at a rotational speed lower than the rated rotational speed (2000 rpm). In step S83, it is monitored whether or not a flushing operation is input. If the flushing operation is input (Yes), the process proceeds to step S84. If not (No), the process returns to step S81.

Further, in the second energy saving control mode of step S7, as shown in FIG. 6, when the operation input information from the operation input means is monitored and it is determined that the batting operation is input in the shifted step S71 (Yes). The process proceeds to step S72, and if it is not (No), the process proceeds to step S73.
In step S72, regardless of whether or not the flushing operation is input, the process proceeds to step S74, and the process is returned by rotating the engine at a rotational speed lower than the rated rotational speed (2000 rpm). In step S73, it is monitored whether or not a flushing operation is input. If the flushing operation is input (Yes), the process proceeds to step S75. If not (No), the process returns to step S71. In step S75, the process is returned by rotating the engine at the rated speed.

Next, operations and effects of the hydraulic crawler drill 1 will be described.
When drilling with the hydraulic crawler drill 1, the operator inputs necessary operation information for the desired drilling hole by operating the input unit 31 which is an operation input means. When the drilling start is commanded, the drifter 10 is driven forward. Thereby, in the control part 25, the mode switching process (refer FIG. 4) mentioned above is performed, and the hole condition is based on the detection information from the feed speed detector 21 and the feed pressure detector 22 which are the hole condition detecting means. In accordance with the determination, a corresponding control mode is set from a plurality of control modes, and the engine speed is defined in the currently set control mode based on the operation input state from the input unit 31. Control the engine speed.

  In the example of the present embodiment, the above-described three control modes are set in advance as a plurality of control modes, and the currently set control modes are the normal control mode (step S1 or S11) and the first energy saving control mode ( In the case of step S8), the engine speed is controlled to the engine speed defined in the currently set control mode regardless of the operation input information from the input unit 31. When the currently set control mode is the second energy saving control mode (step S7), when the operation input state from the input unit 31 is a batting operation and a flushing operation or a batting operation, the engine is turned on. The engine is rotated at a rotation speed lower than the rated rotation speed (step S74). When the operation input state from the operation input means is only the flushing operation, the engine is rotated at the rated rotation speed (step S75).

More specifically, when it is determined based on the detection information that the currently acquired feed speed is not higher than the previously acquired feed speed (No in step S3), the control unit 25 performs control. The mode is set to the normal control mode (step S5), and the engine speed is maintained at the rated speed in any operation input state in the normal control mode.
Further, based on the detection information, the control unit 25 determines that the currently acquired feed speed is higher than the immediately preceding acquired feed speed (Yes in step S3) and the currently acquired feed pressure is greater than the immediately preceding acquired feed pressure. Is not lowered (No in step S6), the control mode is set to the first energy saving control mode (step S8), and the first energy saving control mode (see FIG. 5) is selected. Based on the operation input state, the engine speed is controlled to be lower than the rated speed in any operation input state (step S84).

  Further, based on the detection information, the control unit 25 determines that the currently acquired feed speed is higher than the previously acquired feed speed (Yes in step S3), and the currently acquired feed pressure is greater than the previously acquired feed pressure. Is determined (Yes in step S6), the control mode is set to the second energy saving control mode (step S7), and the second energy saving control mode (see FIG. 6) is selected. Based on the operation input state, when the operation input state is only the flushing operation (Yes in step S73), the engine speed is controlled to the rated speed (step S75), and the operation input state is hitting or striking. When the operation input indicates flushing, the engine speed is controlled to be lower than the rated speed (step S74).

Therefore, according to the hydraulic crawler drill 1, the operator can perform the setting operation of an appropriate engine speed with the input unit 31 such as an operation lever or a switch of the operator cabin 24 each time, from the start to the end of the drilling hole. The controller 25 can automatically control the engine speed to an appropriate value according to the drilling situation and operation mode. Therefore, an appropriate energy saving operation can be performed while drilling under the most appropriate conditions by automatically setting an appropriate engine speed according to the drilling situation and operation mode.
The punching machine according to the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Crawler drill 2 Track frame 3 Shank rod 4 Rod 5 Traveling carriage 6 Bit 8 Boom 9 Rotating mechanism 10 Drifter 11 Guide shell 12 Feed mechanism 13 Blowing mechanism 14 Flushing mechanism 15 Hydraulic drive part 16 Air drive part 17 Rod exchange device 21 Feed speed Detector (drilling state detection means)
22 Feed pressure detector (drilling hole detection means)
25 Control unit 31 Input unit

Claims (5)

A drilling machine comprising a striking mechanism and a flushing mechanism,
Drilling state detection means for detecting the feed pressure and feed speed of the striking mechanism, operation input means for inputting an operator's operation, detection information from the drilling state detection means, and operation information from the operation input means And a controller that controls the engine speed and stores a plurality of control modes that define the engine speed,
The control unit determines a drilling state based on detection information from the drilling state detection unit, sets a corresponding control mode from the plurality of control modes according to the determination, and from the operation input unit. Based on the operation input state, the drilling machine controls the engine speed to the engine speed specified in the currently set control mode. The control unit, as the control mode, a normal control mode for rotating the engine at a rated rotational speed, a first energy-saving control mode for rotating the engine at a rotational speed lower than the rated rotational speed, and the engine A second energy saving control mode for rotating at either the rated rotational speed or a rotational speed lower than the rated rotational speed,
When the currently set control mode is the normal control mode or the first energy saving control mode, the engine speed is currently set regardless of the operation input information from the operation input means. To the engine speed specified in
When the currently set control mode is the second energy saving control mode, when the operation input state from the operation input means is a striking operation and a flushing operation, or a striking operation, the engine is rated. 2. The engine according to claim 1, wherein the engine is rotated at the rated rotational speed when the rotational speed is lower than the rotational speed and the operation input state from the operation input means is only a flushing operation. Drilling machine.   When the control unit determines based on the detection information that the currently acquired feed speed is not higher than the previously acquired feed speed, the control unit sets the control mode to the normal control mode, and the normal control mode Then, the drilling machine according to claim 2, wherein the engine speed is controlled to be maintained at a rated speed in any operation input state. Based on the detection information, the control unit determines that the currently acquired feed speed is higher than the previously acquired feed speed and the currently acquired feed pressure is not lower than the immediately previous acquired feed pressure. Set the control mode to the first energy-saving control mode,
In the first energy saving control mode, the engine speed is controlled to be lower than the rated speed in any operation input state based on the selected operation input state. Item 4. A drilling machine according to item 2 or 3. Based on the detection information, the control unit determines that the currently acquired feed speed is higher than the previously acquired feed speed and the currently acquired feed pressure is lower than the immediately previous acquired feed pressure. Sometimes, set the control mode to the second energy-saving control mode,
In the second energy saving control mode, when the operation input state is only the flushing operation based on the selected operation input state, the engine speed is controlled to the rated speed, and the operation input state performs flashing while striking or striking. The drilling machine according to any one of claims 2 to 4, wherein when the operation is input, the engine speed is controlled to an engine speed lower than the rated speed.

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