JP2511669Y2 - Drilling rig - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to an excavating device for perforating the ground by elevating and lowering an auger by a cord extended from a top sheave of a leader mast.

[Conventional technology]

In the excavation equipment, the main rope is fed from the top sheave on the top of the leader mast to elevate and lower the auger for excavation, and the auxiliary rope provided separately from the main rope is used for suspending steel material for building a drilling hole. However, conventionally, this auxiliary cord is paid out from the auxiliary cord sheave at the tip of the protruding arm fixed to the side portion of the top sheave body.

[Problems to be solved by the device]

The fixed projecting arm for the auxiliary cord of the conventional example is bulky laterally when the leader mast is assembled and disassembled and is inconvenient to handle, and the suspending position of steel or the like cannot be changed with respect to the auger. In addition, when a member other than steel, such as an auger or a leader mast, is lifted, the lifting position cannot be selected. The present invention has been made to solve these problems.When the leader mast is assembled and disassembled, the protruding arm for the auxiliary cord provided on the top sheave is not bulky, and the extension position of the auxiliary cord can be adjusted according to the member to be handled. The purpose is to obtain a changeable drilling rig.

[Means for solving the problem]

As shown in FIGS. 1 to 3, the present invention is an excavation device for raising and lowering an earth auger 11 by a main rope 10 fed from a top sheave A of a leader mast 1,
A hollow shaft 7 which is axially parallel to the leader mast 1 is pivotally attached to the top sheave body 3, and the base of the rotary arm B extending in the lateral direction is fixed to the top end of the hollow shaft 7 and the auxiliary cord is attached to the front end of the rotary arm B. The feed sheave 8 is pivotally attached, and the hollow shaft 7 is connected to a rotary drive device C that allows the rotary arm B to be rotationally fixed, and the upper end of the hollow shaft 7 and a sub-sheave main body 3 side below the hollow shaft 7 are subordinate to each other. Intermediate sheaves 6 and 9 are provided which are axially parallel to the cord extending sheaves 8, and the sub-line 14 for raising and lowering the member is made to pass through substantially the center of the hollow shaft 7 so that the sub-line extending sheaves 8, the intermediate sheaves 6, It is a drilling device that is hung on 9.

[Action]

When the rotary drive device C is driven, the rotary arm B can be rotated in the front-rear direction on both sides of the top sheave body 3 about the hollow shaft 7, so the rotary drive device 20 rotates the leader mast 1 to rotate the earth auger. After the lateral position of 11 is appropriately changed, the rotary arm B is laterally rotated by the rotation driving device C, and the steel material is hooked on the hook 14a at the lower end of the auxiliary cord 14 which is lowered from the auxiliary cord feeding sheave 8. Then, the rotary arm B is rotated again by the rotation driving device C to carry the steel material to a position right above the excavated hole drilled by the auger 11 and hang it inside the hole. If there is a risk that the steel material will collide with each part of the device during the transportation of the steel material, the steel material is transported to the excavation hole while operating the rotary drive device C to change the position of the rotary arm B to avoid the collision. . Further, when the monken is used or when the member or the like of the leader mast is suspended, the rotary arm B is similarly rotated by the rotary drive device C to the optimum position. Then, when the leader mast 1 is assembled and disassembled, the entire device is transported, stored, etc., if the rotary arm B is turned forward along the longitudinal direction of the top sheave body 3, the rotary arm B does not become bulky, It also makes it harder for external objects to hit.

〔Example〕

An embodiment of the present invention will be described in detail with reference to the drawings. In FIG. 1, reference numeral 1 is a leader mast supported by a boom 2 attached to a rotary type machine body 2a. A is a top sheave provided on the top of the leader mast 1, and a main rope-feeding sheave 4 is provided at the front end of the top sheave body 3.
The main rope introducing sheave 5 is provided at the rear end, and the rotary arm B for pivotally supporting the auxiliary rope feeding sheave 8 at the front end is provided at the upper portion. The structure of the rotary arm B portion will be described with reference to FIGS. 2 to 3. That is, in this structure, a hollow shaft 7 which is axially parallel to the leader mast 1 is pivotally attached to the top sheave body 3, and the base of the rotary arm B of the auxiliary cord sheave 8 extending laterally is fixed to the top end of the hollow shaft 7, The hollow shaft 7 is connected to a rotary drive device C such as a hydraulic drive worm device so that the rotary arm B is rotatable and can be fixed at an arbitrary position, and the upper end of the hollow shaft 7 and the top sheave body 3 side below the hollow shaft 7 are fixed. Is provided with intermediate sheaves 6, 9 which are axially parallel to the sub-line feeding sheave 8, and the sub-line 14 unwound from the sub-winding machine 13 via the sub-line feeding sheave 15 is approximately the center of the hollow shaft 7. The sheave 8, which extends through the sub-line, and the intermediate sheaves 6, 9 are hung on the auxiliary sheave 8. A hook 14a is coupled to the lower end of the auxiliary cord 14.
The main rope 10 derived from the main hoisting machine 10a includes a main rope introducing sheave 5, a feeding sheave 4, and a drive motor 11 for an earth auger 11.
a It can be hung in the order of the movable pulley 12 above. When the rotary drive device C is driven, the rotary arm B can be rotated once from the rear to the front of the top sheave body 3. In this rotation section, the fourth
As shown in the figure, the distance L from the axis K of the hollow shaft 7 to the locus circle q of the sub-rope feeding point p is larger than the distance M between the coaxial center K and the main cord feeding point P. . Under such a relationship, after the leader mast 1 is rotated by the worm device 20 to properly position the earth auger 11 laterally, the rotary arm device B is laterally rotated by the rotary drive device C, and the sub-rope is moved. The steel material is hung on the hook 14a at the lower end of the auxiliary rope 14 which is drawn out from the sheave 8 and lowered,
The rotary arm B is again rotated by the rotary drive device C to carry the steel material directly above the excavation hole of the auger 11 and hang it.

Reference numeral 21 is a hydraulic cylinder that supports the leader mast 1 with respect to the boom 2. 22 is a main guide rod for guiding the auger 11. Reference numeral 23 is a sub guide rod, for example, a Monken is slidably attached, and the rotary arm B is turned sideways to be moved up and down by the sub rope 14.

16 and 17 are bearings, and 18 is a collar. Reference numeral 19 denotes an overload protection device, which is a device in which a friction plate 19c is pressed against the side surface of the hollow shaft 7 by a tightening screw 19b screwed to a fixing piece 19a on the worm wheel C1 rotatably fitted to the hollow shaft 7. When a large torque acts on arm B, friction plate 19c and hollow shaft 7
Prevents the contact surface from slipping and damaging the worm device due to overload.

If the rotary arm B can be expanded and contracted by a hydraulic cylinder, the handling becomes convenient.

[Effect of device]

According to the present invention, a hollow shaft 7 which is axially parallel to the leader mast 1 is pivotally attached to the top sheave body 3, and the base of the rotary arm B of a sub-strand feeding sheave 8 extending in the lateral direction is fixed to the top end of the hollow shaft 7, A rotary fixing device C that allows the rotary arm B to be fixed in rotation is connected to the hollow shaft 7, and intermediate sheaves 6 and 9 are provided on the upper end of the hollow shaft 7 and on the side of the top sheave body 3 below the hollow shaft 7 to form a member. Since the auxiliary rope 14 for raising and lowering is hung on the auxiliary rope feeding sheave 8 and the intermediate sheaves 6 and 9 so as to pass through the substantial axis of the hollow shaft 7, the rotary arm B is rotated by the rotary drive device C. Is rotated to project the sub-line feed-out sheave 8 from the peripheral surface of the top sheave main body, and the sub-line 14 is used to hang steel material, for example, while rotating the rotary arm B, the steel material is carried directly above the excavation hole of the auger 11. You can hang it at. Moreover, due to the rotation of the rotary arm B during these operations,
Can be turned around to avoid this. Moreover, these tasks
In the present invention, it can be easily done by rotating the rotating arm B without rotating the entire reader mast. When the rotary arm B is extended forward along the longitudinal direction of the top sheave main body 3, when the leader mast 1 is assembled and disassembled, and all the devices are transported,
It can be handled without being bulky when it is stored.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is an enlarged side view of an essential part of the embodiment, FIG. 3 is an enlarged plan view of the essential part, and FIG. It is explanatory drawing which shows the relationship between a sub-cord feed-out point. In the figure, A ... Top sheave, B ... Rotating arm, C ... Rotation drive device, 1 ... Leader mast, 2 ... Boom, 3 ...
Top sheave body, 6 ... intermediate sheave, 7 ... hollow shaft,
8 ... Secondary sheave, 9 ... Intermediate sheave, 10 ...
… Main line, 15… Subline transfer sheave, 14… Subline

Claims (1)

(57) [Scope of utility model registration request] 1. A top sheave (A) of a leader mast (1).
In a drilling device for raising and lowering an earth auger (11) by a main rope (10) fed out from a hollow shaft (7) parallel to a leader mast (1) in a top sheave body (3).
The base portion of the rotary arm (B) extending in the lateral direction is fixed to the top end of the hollow shaft (7), and the sub-strand feeding sheave (8) is pivotally connected to the front end of the rotary arm (B). Then, a rotary drive device (C) for freely fixing the rotary arm (B) to the hollow shaft (7).
And the upper end of the hollow shaft (7) and the intermediate sheaves (6, 9) on the side of the top sheave body (3) below the hollow shaft (7), the auxiliary rope (14) for raising and lowering the member. A drilling device in which a hollow shaft (7) is passed through the auxiliary shaft and the intermediate sheave (6, 9) so that the hollow shaft (7) passes through the shaft.