JP2008231806A - Excavator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize the improvement in work efficiency, certainty of work and reduction in work cost, in an excavator using a down-the-hole hammer. <P>SOLUTION: This excavator has an auger 3 suspended and supported by a work machine 1 and the down-the-hole hammer 5, and supplies a confluent material to the down-the-hole hammer 6 side by a supply hose 23 by merging compressed air from a compressor device 11 with fluid from a fluid supply device 13, and is constituted for remotely operating both a first motor-operated opening-closing valve 18 and a second motor-operated opening-closing valve 19, by providing the first motor-operated opening-closing valve 18 opening-closing a supply pipe 16A of the compressed air and the second motor-operated opening-closing valve 19 opening-closing a supply pipe 16B of spray water, in a confluent part 16 for merging the compressed air with the spray water. Such a constitution can secure precision of work, for example, by allowing an operator getting into an operator cab 10 of the work machine 1 to perform remote operation of the respective motor-operated opening-closing valves 18 and 19, and can improve work efficiency and operability without requiring an operator to frequently move in work. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a structure for supplying compressed air and spray water in an excavator using a down-the-hole hammer.

  Conventionally, for example, it is known to use a down-the-hole hammer as means for drilling and excavating a rock buried in the ground (see, for example, Patent Documents 1 to 3).

  This down-the-hole hammer is configured to apply a striking force to the drilling head with a piston hammer. FIG. 3 shows a conventional general excavator Z0 using this down-the-hole hammer.

  In FIG. 3, reference numeral 1 denotes a working machine having a boom 2, and an auger 3 is suspended and supported at the tip of the boom 2, and a connecting rod 4 is provided below the auger 3. A down-the-hole hammer 5 is attached. The down-the-hole hammer 5 is configured by accommodating a drilling head 8 and a piston hammer 6 that gives a striking force of the drilling head 8 in a cylinder 7.

  On the other hand, in FIG. 3, reference numeral 11 denotes a compressor device that supplies compressed air, 13 denotes a fluid supply device that supplies spray water, 15 denotes an oiler, and compressed air from the compressor device 11 passes through an air hose 31 or The spray water from the fluid supply device 13 is supplied to the oiler 15 through a water hose 32, respectively. In the oiler 15, lubricating oil is added and supplied to the compressed air supplied from the compressor device 11. The sprayed water supplied from the fluid supply device 13 is further mixed with the compressed air after the lubricating oil is added in the oiler 15 in a sprayed state, and the mixed fluid is supplied to the down-the-hole via the supply hose 33. Supplyed to the hammer 5 side, the piston hammer 6 is actuated by compressed air to strike the drilling head 8, drilling and excavating rocks and the like with the drilling head 8, and spray water to the drilling head 8. It is ejected from the portion to cool the drilling head 8 or to prevent dust from scattering.

JP 2007-2485 A JP 2006-342614 A JP 2002-364280 A.

  By the way, the compressed air is supplied only when the down-the-hole hammer 5 is operated, and when it is not operated, the supply is stopped from the viewpoint of protecting the supply hose 33 and the like. The spray water is not always supplied when the down-the-hole hammer 5 is operated. For example, the object to be excavated has a property of generating less dust, or the temperature raising action of the drilling head 8 is increased. When the amount is small, the supply is stopped even when the down-the-hole hammer 5 is in operation. That is, it is necessary to finely carry out the supply / stop operation of compressed air and spray water according to the work situation.

  In this case, in the conventional excavator Z0, the on-off valve 34 for opening and closing the supply line of compressed air and the opening and closing for opening and closing the supply line of the spray water at the confluence portion of the compressed air and the spray water on the downstream side of the oiler 15 A valve 35 is provided, and supply / stop of supply of compressed air and spray water is performed by opening / closing the opening / closing valves 34 and 35.

  However, conventionally, each of the on-off valves 34 and 35 is a manual valve. Therefore, when excavating work, it is necessary for the operator to directly and manually perform the on-off valves 34 and 35. Was low. In addition, the opening / closing operation of each of the on-off valves 34 and 35 by such an operator is instructed by an operator who has boarded the operator's cab 10 of the work machine 1 and is most aware of the work situation or the progress of the work. There is also a problem in terms of work reliability and accuracy, for example, an accurate opening / closing operation cannot be performed unless there is sufficient communication between the operator and the operator.

  Therefore, the present invention has been made for the purpose of improving workability and ensuring work reliability and accuracy in an excavator using a down-the-hole hammer.

  In the present invention, as a specific means for solving such a problem, an auger 3 suspended and supported by the work machine 1 and a down-the-hole hammer in which a striking force is applied by a piston hammer 6 to a drilling head 8 provided at the lower end. 5, the compressed air supplied from the compressor device 11 and the fluid supplied from the fluid supply device 13 are combined and supplied to the down-the-hole hammer 6 side by the supply hose 23, and the hammer head 8 performs drilling and excavation. In the excavator, a first electric on-off valve 18 for opening and closing the compressed air supply pipe 16A and the spray are joined to a joining portion 16 for joining the compressed air from the compressor device 11 and the spray water from the fluid supply device 13. While having the 2nd electric on-off valve 19 which opens and closes the water supply pipeline 16B, the said 1st electric drive Is characterized in that it has a closed 18 are both configured to remotely operate the second electric on-off valve 19.

  According to the present invention, the first electric on-off valve 18 that opens and closes the compressed air supply pipe 16 </ b> A at the joining portion 16 that joins the compressed air from the compressor device 11 and the spray water from the fluid supply device 13 and the above. Since the second electric on-off valve 19 for opening and closing the supply line 16B of the spray water is provided and the first electric on-off valve 18 and the second electric on-off valve 19 are both remotely operated, If the operator who gets into the cab 10 of the work machine 1 performs remote operation of the valves 18 and 19, the operator supplies compressed air and spray water while directly confirming the work status or the progress of the work. -The supply stop operation can be performed automatically. As a result, for example, as compared with the conventional case where the operator manually opens / closes the opening / closing valve in response to the operator's instruction, the workability is greatly improved and the intention between the operator and the operator is improved. The accuracy of the work is not affected by the quality of the communication, and the reliability and accuracy in the work are ensured.

  Hereinafter, the present invention will be specifically described based on preferred embodiments.

  FIG. 1 shows an excavator Z according to an embodiment of the present invention. In this excavator Z, an auger 3 is suspended and supported at the tip of a boom 2 of a work machine 1, and a down-the-hole hammer 5 is attached to the lower side of the auger 3 via a connecting rod 4. The down-the-hole hammer 5 is configured by accommodating a drilling head 8 and a piston hammer 6 that gives a striking force of the drilling head 8 in a cylinder 7.

  A compressor device 11 that supplies compressed air is installed in the vicinity of the work machine 1. The compressed air from the compressor device 11 is connected to a valve unit 14 described below via an air hose 21 provided with a line oiler 12 in the middle thereof. In addition, a fluid supply device 13 for supplying spray water is connected to the oiler 15 via a water hose 22.

  As shown in FIG. 2, the valve unit 14 is configured by housing a junction 16 formed by connecting a first pipe 16 </ b> A and a second pipe 16 </ b> B in a T shape in a case 17.

  The first pipe line 16A has one end connected to the compressor device 11 via the air hose 21 and the other end connected to the down-the-hole hammer 5 side via a supply hose 23. A first electric on-off valve 18 that opens and closes the first pipe line 16A is provided on the air upstream side of the connection portion.

  The second pipe line 16B has one end connected to the fluid supply device 13 side via the water hose 22 and the other end connected to the first pipe line 16A. A second electric on-off valve 19 that opens and closes 16B is provided.

  Therefore, by opening and closing the first electric on-off valve 18 and the second electric on-off valve 19 as appropriate, the “down-the-hole hammer 5 side” can be “simultaneous supply of compressed air and spray water”, “single supply of compressed air alone”, And “stopping the supply of compressed air and spray water” can be performed selectively.

  Further, the first electric on-off valve 18 and the second electric on-off valve 19 are connected to a remote operation switch 26 via a terminal 24 and an operation cable 25, and are controlled to be opened and closed by a switch operation at the remote operation switch 26. It has become. In this embodiment, the remote control switch 26 is pulled into the cab 10 of the work machine 1 so that the operator can directly operate the cab 10.

  With the configuration described above, during excavation work using the down-the-hole hammer 5, the operator operates the down-the-hole hammer 5 in the cab 10 of the work machine 1 and appropriately switches the remote control switch 26. The electric on-off valves 18 and 19 can be operated to open and close as required. As a result, for example, as compared with the conventional case where the operator manually opens / closes the opening / closing valve in response to the operator's instruction, the workability is greatly improved and the intention between the operator and the operator is improved. The accuracy of the work is not affected by the quality of the communication, and the reliability and accuracy in the work are ensured.

1 is an overall view of an excavator according to an embodiment of the present invention. It is an enlarged view of the valve unit shown in FIG. It is a general view of the conventional excavation apparatus.

Explanation of symbols

1 ·· Working machine 2 ·· Boom 3 ·· Auger 4 ·· Connecting rod 5 ·· Down-the-hole hammer 6 ·· Piston hammer 7 ·· Cylinder 8 ·· Drilling head 10 ·· Operating room 11 ·· Compressor device 12 ·・ Line oiler 13 ・ ・ Fluid supply device 14 ・ ・ Valve unit 15 ・ ・ Euler 16 ・ ・ Merging section 18 ・ ・ First electric on-off valve 19 ・ ・ Second electric on-off valve 21 ・ ・ Air hose 22 ・ ・ Water hose 23 ・・ Supply hose 24 ・ ・ Terminal 25 ・ ・ Operating cable 26 ・ ・ Remote control switch

Claims (1)

An auger (3) suspended and supported by the work machine (1), and a down-the-hole hammer (5) adapted to apply a striking force by a piston hammer (6) to a drilling head (8) provided at the lower end;
The compressed air supplied from the compressor device (11) and the fluid supplied from the fluid supply device (13) are merged and supplied to the down-the-hole hammer (6) side by the supply hose (23), and the hammer head (8) A drilling device for drilling and drilling by
A first electric on-off valve that opens and closes the compressed air supply pipe (16A) at a junction (16) that joins the compressed air from the compressor device (11) and the spray water from the fluid supply device (13). (18) and a second electric on-off valve (19) for opening and closing the spray water supply pipe (16B) are provided,
The excavator characterized in that both the first electric on-off valve (18) and the second electric on-off valve (19) are remotely operated.

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