JP3450117B2 - Drilling equipment for excavators - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power shovel drilling device for mounting on a power shovel to pierce rock or concrete. 2. Description of the Related Art A power shovel is provided with a boom on a swivel of a traveling bogie, an arm at the tip of the boom, and a bucket at the tip of the arm. The boom cylinder, the arm cylinder, and the By operating the bucket cylinder, the boom and arm are raised and lowered, and the bucket is rotated back and forth to excavate earth and sand. When the work is stopped, the boom and the arm are required to be lowered so that the bucket is in contact with the ground to ensure safety when the work is stopped. The boom and the arm are configured to descend. Therefore, as shown in FIG. 4, when the excavator drilling device 1 is mounted on the tip of the arm 6 of the power shovel 5 and used, when the operation is stopped, the boom 10 and the arm 6 are automatically turned off. Therefore, it is necessary to lower the boom 10 and the arm 6 before the stop and place the excavator drilling device 1 on the ground before stopping. Conventionally, when the drilling apparatus 1 for a power shovel is placed on the ground, a support 30 is placed on the ground, and the support 30 supports the front and rear portions of the guide shell 3. [0005] However, the guide shell 3 of the drilling device has a slender shell structure since the rock drill 2 is mounted and guided and moved in the direction of the drilling hole. When the guide shell 3 is supported by the support 30, the boom 6 and the arm 10 of the power shovel 5
Since the guide shell 3 supports the load of the drilling device 1 for a power shovel, the guide shell 3 may be subjected to a large load and bend. If a structure having a large strength is used to prevent the bending of the guide shell 3, there is a problem that the weight of the guide shell 3 increases and the cost increases. SUMMARY OF THE INVENTION The present invention solves such a problem in a drilling device for a power shovel. When a drilling device for a power shovel is mounted on the ground, a large load is not applied to the guide shell, and the guide shell is not guided. An object of the present invention is to provide a drilling device for a power shovel that does not cause bending of a shell. According to the present invention, a guide shell on which a rock drill is mounted, a guide shell on which the rock drill supporting the guide shell is mounted, and a guide mounting for supporting the guide shell are provided. And a bracket for attaching the guide mounting to the end of the arm of the excavator, and a protect arm for supporting a load when the excavator is mounted on the ground is provided on the bracket. The above problem is solved by providing a balance arm for preventing the fall of the guide shell. When a power shovel drilling device is mounted on the tip of the arm of the power shovel and used, the boom and the arm are lowered before stopping and the power shovel drilling device is placed on the ground. At this time, the excavator for a power shovel is lowered so that the protect arm and the balance arm are on the lower side. When the excavator drilling device is lowered, the protect arm is grounded and supports the load of the excavator boom, arm and excavator drilling device. The balance arm is lightly grounded to maintain stability and prevent falls. The load when the excavator for a power shovel is placed on the ground is supported by a protect arm provided on a bracket, and the balance arm is only lightly grounded to maintain stability and to prevent falling. Is not subjected to a large load, and there is no possibility that the guide shell is bent. FIG. 1 is a front view showing a state in which a power shovel drill according to an embodiment of the present invention is mounted on a power shovel. FIG. 2 is a power shovel drill. FIG. 3 is an explanatory view of a state in which a drilling device for a power shovel is placed on the ground. A drilling apparatus 1 for a power shovel comprises a guide shell 3 on which a rock drill 2 is mounted and a guide shell 3 having the same.
And a bracket 7 for attaching the guide mounting 4 to the tip of the arm 6 of the power shovel 5. The power shovel 5 has a known structure. A boom 10 is provided on a swivel 9 of a traveling vehicle 8, and an arm 6 is pivotally supported at a tip of the boom 10. Can be raised and lowered by the boom cylinder 11 and the arm cylinder 12. At the tip of the arm 6, a bracket 7 of the excavator 1 is mounted. The bracket 7 is tilted by a bucket cylinder 16 provided on the arm 6, and tilts the guide shell 3 via the guide mounting 4. A swing cylinder 17 is provided between the bracket 7 and the guide mounting 4.
The guide shell 3 is swung via the guide mounting 4 by the expansion and contraction of the swing cylinder 17. On the side opposite to the side where the bracket 7 is attached to the arm 6, a grounding member 2 is provided at the tip to support the load when the excavator 1 is mounted on the ground.
A T-type protection arm 20 having 0t is fixedly provided. A balance arm 21 is provided on the front and rear sides of the guide shell 3 to prevent the guide shell 3 from overturning. When drilling work, a bucket (not shown) is removed from the tip of the arm 6 of the power shovel 5, and the bracket 7 of the power shovel drilling device 1 is attached to the tip of the arm 6, and the power shovel is mounted. 5 is driven to the vicinity of a predetermined drilling hole position and stopped. Next, the swivel 9 of the power shovel 5 is turned, and the boom cylinder 11, the arm cylinder 12, and the bucket cylinder 16 are operated to move the boom 10, the arm 6, and the bracket 7, so that the swing cylinder 17 expands and contracts. The foot pad 1 at the tip of the guide mounting 4 is adjusted while adjusting the swing angle of the guide mounting 4.
5, the guide slide cylinder 14 is reduced, the guide shell 3 is moved forward on the guide mounting 4, and the foot pad 13 at the front end of the guide shell 3 is pressed against the rock 20 to excavate the power excavator. The drilling device 1 is positioned at the drilling position. When positioning is completed, the excavator drilling device 1 drives the rock drill 2 and guides the rock drill 2 in the drilling direction by the guide shell 3 to perform the drilling while moving forward. When the drilling is completed, the boom 10 and the arm 6 are lowered before the stop, and the drilling device 1 for a power shovel is placed on the ground. At this time, the excavator drilling device 1 is lowered so that the protect arm 20 and the balance arm 21 are on the lower side. When the excavator drilling device 1 is lowered, the grounding member 20t of the protection arm 20 is grounded, and the load of the boom 10 and the arm 6 of the excavator 5 and the load of the excavator drilling device 1 are supported by the protect arm 20. The balance arm 20 is lightly grounded to maintain the stability of the guide shell 3 and prevent it from falling. The load when the power shovel drilling device 1 is placed on the ground is supported by a protect arm 20 provided on the bracket 7, and the balance arm 21 is lightly grounded to maintain stability and prevent overturn. Therefore, a large load is not applied to the guide shell 3 and the guide shell 3 does not bend. As described above, in the excavator for a power shovel according to the present invention, when placed on the ground, a large load is not applied to the guide shell, and the guide shell may be bent. There is no.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing a state in which a drilling device for a power shovel according to an embodiment of the present invention is attached to the power shovel. FIG. 2 is a side view of a drilling device for a power shovel. FIG. 3 is an explanatory view of a state where a drilling device for a power shovel is placed on the ground. FIG. 4 is an explanatory view of a state where a conventional excavator for a power shovel is placed on the ground. [Description of Signs] 1 Drilling device for power shovel 2 Rock drill 3 Guide shell 4 Guide mounting 5 Power shovel 6 Arm 7 Bracket 8 Traveling trolley 9 Swivel 10 Boom 11 Boom cylinder 12 Arm cylinder 13 Foot pad 14 Guide slide cylinder 15 Foot pad 16 Bucket cylinder 17 Swing cylinder 20 Protect arm 21 Balance arm

Claims (1)

(57) [Claims] [Claim 1] A guide shell equipped with a rock drill, a guide mounting for supporting the guide shell, and a bracket for attaching the guide mounting to an end of an arm of a power shovel. In the excavator drilling device, a protect arm for supporting the load when the excavator drilling device is placed on the ground is provided on the bracket, and the guide shell is provided with a balance arm for preventing overturning. Drilling equipment for power shovels.