JPH0522688U - Leader excavator - Google Patents

Abstract

(57) [Summary] [Purpose] It is not necessary to increase the weight of the lifting part. A main rail 12 is arranged on a leader 10 in an upright state in a vertical direction, and one end of a push-in operation cylinder 24 having an in-and-out rod 26 is positioned and joined to a predetermined position of a movable frame 20.
The clamp piece 28 provided at the other end of the
The excavation cutter 31 is locked to the main rail 12 only when moving in or out of either direction, and is repeatedly operated by the cylinder 24 without relying on the weight of the ascending / descending portion.
Can be pushed into the excavation site.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a leader type excavator that excavates by using an earth drill, an earth auger or the like as a cutter for excavation.

[0002]

[Prior Art]

 This type of leader excavator is equipped with an excavation drive unit attached to a movable frame that can move up and down along a standing leader, and connects an excavation cutter to the excavation drive unit to move the cutter to the excavation site. Excavate while pushing. In conventional excavators, there are ones in which a movable frame is moved up and down by a chain, and ones in which it is raised by a rope and lowered by its own weight.

[0003]

[Problems to be solved by the device]

 However, since the conventional excavator as described above uses a chain or rope, it has a drawback that it cannot be excavated unless the weight of the ascending / descending portion is increased.

In view of the above drawbacks of the prior art, the purpose of the present invention is to use a pushing cylinder to push the excavating cutter into the excavation site, thereby eliminating the need to increase the weight of the lifting portion. To provide.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention comprises an excavation drive unit attached to a movable frame that can be moved up and down along a standing leader, and excavates an excavation cutter connected to the excavation drive unit. In a leader-type excavator that excavates while pushing into a location, a main rail that is vertically arranged on the leader in an upright state and an entrance / exit rod, and one end of which is positioned and joined to a predetermined location of the movable frame. A pushing action cylinder is provided, and the other end of the cylinder is provided with a clamp piece that is locked to the main rail only when the rod moves in or out of either one of the directions of movement of the rod. It is characterized in that the excavation cutter is pushed into the excavation site by an operation.

[0006]

[Action]

 In the leader excavator according to the present invention, a main rail is arranged in a vertical direction on a standing leader, and one end of a pushing operation cylinder having an in-and-out rod is positioned and joined to a predetermined position of a movable frame. The clamp piece provided at the other end of the cylinder is locked to the main rail only when the in-and-out reciprocating motion of the in-and-out rod is performed in one direction. The movement can push the excavation cutter into the excavation site.

[0007]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view showing an outline of a state in which a leader type excavator according to an embodiment of the present invention is attached to a tracked vehicle.

In the leader type excavator according to the present embodiment, a main rail 12 (see FIGS. 2 and 3) is vertically arranged on a leader 10 in an upright state, and a pushing operation having an in-and-out rod 26 is provided. The lower end of the hydraulic cylinder for use 24 is positioned and joined to a predetermined position on the lower part of the movable frame 20 which is slidable up and down, and the clamp piece 28 joined with the pin 26a at the end of the rod 26 provided in the hydraulic cylinder 24. Is locked to the main rail 12 only at the time of the outgoing and outgoing reciprocating operation of the ingress and egress rod 26, and the excavation cutter 31 can be pushed into the excavation site by the repeated egress and egress operation of the ingress and egress rod 26.

The leader 10 is attached to the tracked vehicle 1 via the support member 2 and the undulating hydraulic cylinder 4, and is in an upright state when the unloading hydraulic cylinder 4 moves in and out to move up and down. It is rotated around the pin 5 by the entry operation of the and is placed on the tracked vehicle 1 in a sideways state. To explain the reader 10 in the standing state shown in FIG. 1, a leader body 11 made of a circular pipe in a substantially vertical posture, and a leader body 11 fixed to the leader body 11 in a substantially vertical posture on the front side thereof. In addition to the main rail 12 having a character-shaped cross section, the guide rails 13 and 13 having a circular cross section that are fixed to the left and right through the relay members 13a and 13a in a symmetrical arrangement over the entire length of the reader main body 11 and the fixed pulley 16a at the top support the wire rope. A pulley supporting portion 14 for supporting the movable pulley 17 via 33 and an auxiliary member 15 for lightly receiving the cutter 31 at the lower portion are provided.

FIG. 2 is a partial plan view showing an essential part of the leader of the leader type excavator according to the present invention in a standing state, and FIG. 3 is a front view thereof. The movable frame 20 includes a flat plate-shaped frame body 21 in a substantially vertical posture, and a semi-circular cross-section top guide projecting from both left and right sides of the frame body 21 toward the reader body 11 in FIG. It is provided with receivers 22 and 22 and lower guide receivers 23 and 23, and these guide receivers 22 and 23 are fitted on the outer surfaces of the guide rails 13 and 13 so as to be slidable up and down, and on the front side of the frame body 21. As shown in FIG. 1, the excavation drive device 30 is attached, and the movable pulley 17 is attached to the upper portion of the leader main body 11 with the fixed pulley 16a and the wire rope 33 wound around the movable pulley 17. Suspended from the pulley support 14.

The hydraulic cylinder 24 has a cylinder body 25 and an upward / outgoing rod 26, and the lower end of the cylinder body 25, which is one end, is positioned and joined by a pin 25 a at a predetermined position under the movable frame 20, and the other end. A clamp piece 28 is rotatably joined to the upper end of the entrance / exit rod 26 with a pin 26a. The clamp piece 28 is provided with a T-shaped engagement groove 29 that fits outside the main rail 12 as shown in FIG. As shown in FIG. 3, both side surfaces of the T-shaped engaging groove 29 are bent at the upper and lower central positions, and the in-and-out rod 26 enters the cylinder body 25 and both upper and lower end surfaces of the clamp piece 28 shown by a chain double-dashed line. When 29c is vertical to the main rail 12, the upper half of the left side surface 29a and the lower half of the right side surface 29b are along the main rail 12, and the lower half of the left side surface 29a and the upper half of the right side surface 29b are both. They are parallel to each other and are inclined at a predetermined angle with respect to the main rail 12, and in this state, they are not locked to the main rail 12. Then, when the in-out rod 26 moves out, the clamp piece 28 rotates about its own pin 26a by its own weight so that both upper and lower end surfaces 29c are inclined with respect to the main rail 12. At this time, the clamp piece 28 The lower half of the left side surface 29a and the upper half of the right side surface 29b are pressed and locked to the main rail 12 to clamp the main rail 12. That is, the clamp piece 28 is tilted by its own weight and locked to the main rail 12 only during the exiting / reciprocating movement of the entrance / exit rod 26.

The cutter 31 is attached downward to the excavation drive device 30, and when the excavation drive device 30 is at the highest position as shown in FIG. 1, the lower end is substantially flush with the lower end of the reader 10, The clamp piece 28 is tilted by its own weight and locked to the main rail 12 only during the exit / reciprocation movement of the entrance / exit rod 26, and when the entrance / exit rod 26 is repeatedly entered / exited, the exit / entry rod 26 exits / exits. Since the excavation drive device 30 descends together with the movable frame 20 with each operation, the excavation drive device 30 is pushed into the excavation site.

The wire rope 33 is wound around the fixed pulleys 16 a and 16 b on the top of the leader 10, the moving pulley 17, and the fixed pulleys 6 a and 6 b provided at the rear portion of the tracked vehicle 1, and the pulley support portion 14 One end is hooked on a hooking metal 14a fixed to the wheel, and a winch (not shown) mounted on the tracked vehicle 1 can be used for winding and unwinding.

In such an excavator, as shown in FIG. 1 at the start of excavation, the wire rope 33 is fed out from the state where the movable frame 20 and the excavation drive device 30 are at the highest position, and the movable frame 20 is lowered to lower the cutter 31. The tip is brought into contact with the excavation site, the winch (not shown) mounted on the tracked vehicle 1 is operated to feed the wire rope 33, and the hydraulic cylinder 24 is also activated to move the rod 26 in and out to move the cutter 31. The excavation drive device 30 rotationally drives the cutter 31 while pushing it in to excavate. When the cutter 31 is pushed in for one stroke of the hydraulic cylinder 24, the in-and-out rod 26 is immediately moved in and out, and then the rod is moved out, and the cutter 31 is rotated while being pressed in again for excavation. After excavating to a predetermined depth by repeating such operations, the wire rope 33 is wound by the winch and the movable frame 20 is returned to the original position shown in FIG.

The present invention is not limited to the above embodiment, and the cutter may be of a chain type, and the clamp piece 28 may be attached to the cylinder body 25 side instead of being attached to the exit rod 26. Various modifications are possible without departing from the spirit of the invention.

[0016]

[Effect of the device]

 As described above, according to the present invention, the leader in the standing state is provided with the main rails arranged along the up-down direction, and the pushing-in cylinder having the entrance / exit rod and one end of which is positioned and joined to a predetermined position of the movable frame. The other end of the cylinder is equipped with a clamp piece that is locked to the main rail only when the rod moves in and out either way, and the excavating cutter is excavated by the reciprocating action of the pushing cylinder. Since it can be pushed into a place, it is not necessary to increase the weight of the movable frame and the elevating part such as the excavation drive device, and it is possible to save the power required to elevate the part.

[Brief description of drawings]

FIG. 1 is a side view showing an outline of a state in which a leader type excavator according to an embodiment of the present invention is attached to a tracked vehicle.

FIG. 2 is a partial plan view showing a main part of a leader type excavator according to the present invention in a standing state of a leader.

FIG. 3 is a partially omitted front view showing a main part of a leader type excavator according to the present invention in a standing state.

[Explanation of symbols]

 10 Leader 12 Main Rail 13 Guide Rail 20 Movable Frame 24 Hydraulic Cylinder 25 Hydraulic Cylinder 25 Cylinder Body 26 Entry / Exit Rod 28 Clamp Piece 29 Engagement Groove 29a Side 29b Side 30 Excavation Drive 31 Cutter 33 Wire Rope

Claims (1)

[Scope of utility model registration request] 1. A leader type excavator that comprises an excavation drive unit attached to a movable frame that can move up and down along an upright leader, and excavates while pushing an excavation cutter connected to the excavation drive unit to an excavation site. In the machine, the leader in a standing state is provided with a main rail arranged along the up-down direction, and a pushing-in operation cylinder having an exit rod and one end of which is positioned and joined to a predetermined position of the movable frame. The end is provided with a clamp piece that is locked to the main rail only when moving in either one of the reciprocating motions of the entrance and exit rods, so that the excavation cutter can be pushed into the excavation site by the repeated movements of the cylinder. Characteristic leader type excavator.