JPH0115751Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to an excavation device for creating pile holes and the like.

[Prior art and its problems]

As is well known, the earth auger is made up of a long mast with a rotary drive device that connects the top end of the auger screw and is movable up and down.The screw allows continuous excavation, and cement milk passes through the inside of the screw and is pumped from the tip of the excavation. It is possible to pour out solidifying agents such as, and realize efficient and rational construction. However, since the entire earth auger protrudes upward, it could only be used on the ground in a location where a large space can be secured above.

[Purpose of invention]

The purpose of the present invention is to eliminate the disadvantages of the conventional example,
To provide an excavation device which can be used even in vertically narrow places such as underground tunnel construction by making the overall height low without impairing the advantages of an earth auger as much as possible.

[Key points of the idea]

However, according to the present invention, the lever is provided with a short mast that can be raised freely on a movable trolley, and the excavation mechanism that is attached to the mast so that it can be raised and lowered is connected to a drive motor that projects downward and a transmission mechanism. It consists of an auger screw rotating shaft connected at approximately the same level as the drive motor, and is achieved by connecting the excavation mechanism to the cylinder for lifting and lowering housed within the mast with a wire.

[Example of idea]

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a front view showing an embodiment of the excavation device of the present invention, and FIG. 2 is a plan view of the same. In the figure, 1 indicates a movable truck. In this embodiment, the trolley 1 is of a trolley type equipped with wheels 1a that roll on rails 2. A short mast 3 is erected by pinning its lower end to approximately the center of the truck 1 so as to be freely raised, and a stay cylinder 4 for adjusting the angle is attached between the upper part of the mast 3 and the truck 1. On the other hand, the inside of the mast 3 is hollow, and a cylinder 5 for raising and lowering is housed therein, and a guide roller 6 is attached to the end of the rod 5a of the cylinder 5 which can extend downward.
It raises and lowers the excavation mechanism 10, which will be described later.
This roller 6 connects the middle of the wire 7 with one end fixed.
Wind it around.

Further, a leader 8 is disposed vertically on the front surface of the mast 3, and the excavation mechanism 10 is attached to the mast 3 through a bracket 9 fitted to the leader 8 so as to be vertically movable.

As shown in FIGS. 3 to 5, this excavation mechanism 10 includes drive motors 11 and 1 that protrude downward.
1', a transmission mechanism 12 connected to the upper ends of the motors 11, 11' and extending in the horizontal direction;
2 and located at the same height level as the motors 11, 11'.

6 and 7 are explanatory diagrams showing the mechanism by which the output of the motors 11, 11' is transmitted to the auger screw rotating part 13. The motors 11, 11' are attached to the outside of the main housing 14a, and the upper part of the In the auxiliary housing 14b provided in the
The sprocket 15 provided on the drive shafts 1 and 11' is connected to the other sprocket 17 by a chain 16, and the shaft of the sprocket 17 extends downward to the main housing 1.
The outer shaft part 1 of the rotating shaft parts 13, 13', 13'' in which the gears 18 arranged in three rows are arranged inside the shaft part 4a.
It meshes with gears 19 and 19'' of 3 and 13''. Furthermore, the gear 19' of the intermediate shaft portion 13' is connected to this gear 1.
In this way, the transmission mechanism 12 can also serve as a speed reducer, and when it is multi-axis with three axes as in this embodiment, for example, It is also possible to set the rotation rate of the shaft portion 13' to be lower than that of the outer shaft portions 13, 13''.

The main housing 14a extends rearward, and is provided with a bracket 9, and a sheave 20 for receiving the wire row 7 for lifting and lowering is attached to the center thereof, while the auger screw rotation shaft portions 13, 13',
Swivels 21, 21', and 21'' were provided on the top of 13'', respectively. Note that the main housing 14a, etc. and the overall combination are not limited to the shapes shown in the figures.
For example, various modifications can be considered, such as a large housing combined with the auxiliary housing 14b, and it is also possible to configure it as a single-shaft auger or a multi-shaft auger with other numbers.

Next, to explain how to use it, it is pulled by a towing vehicle and moved on rail 2 to the designated piling location.
The auger screw rotating parts 13, 13', 13'' connect an auger screw (not shown) below. Initially, the cylinder 5 for lifting and lowering was extended to the maximum length, and the excavation mechanism 10 was connected to the short mast 3. The drive motors 11 and 11' are mounted downward, so they do not protrude above the mast 3.

When the motors 11, 11' are started, the transmission mechanism 1
2, the auger screw rotates, and when the cylinder 5 is gradually contracted, the excavation mechanism 10 descends and excavation is performed, and when the first auger screw is inserted into the ground, only the excavation mechanism 10 is turned. Raise it up and add a new auger screw. In addition, swivels 21 and 2 are connected via hoses (not shown).
1' and 21'', appropriate mortar, cement milk, etc. are poured out from the tip of the auger screw.

[Effect of idea]

As mentioned above, the excavator of the present invention makes full use of its advantages as an earth auger, has a short mast, and eliminates upwardly protruding parts, making the entire structure compact, especially for underground tunnel construction. This is a convenient device that can be used in places where vertical space is limited.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the excavation device of the present invention, Fig. 2 is a plan view of the above, Fig. 3 is a front view of the excavation mechanism portion, Fig. 4 is a plan view of the same, and Fig. 5 is a side view of the same. FIG. 6 is a side explanatory view showing the transmission configuration, and FIG. 7 is a plan view explanatory view of the same. 1... Trolley, 1a... Wheels, 2... Rail, 3
... Mast, 4 ... Stay cylinder, 5 ... Cylinder for lifting, 5a ... Rod, 6 ... Guide roller, 7 ... Wire, 8 ... Leader, 9 ... Bracket, 10 ... Excavation mechanism, 11,11'...
Drive motor, 12...Transmission mechanism, 13, 13',
13″...Auger screw rotating shaft part, 14a
...Main housing, 14b...Auxiliary housing,
15, 17... Sprocket, 16... Chain, 18, 19, 19', 19''... Gear, 20...
...Sheave, 21, 21', 21''...Swivel.

Claims (1)

[Scope of utility model registration request] An excavation mechanism is provided with a short mast that can be raised freely on a movable trolley, and is attached to the mast so that it can be raised and lowered.
It consists of a drive motor that protrudes downward, and an auger screw rotation shaft that is connected to the drive motor at almost the same level via a transmission mechanism, and the lifting cylinder housed in the mast and the excavation mechanism are connected by wire. A drilling rig characterized by being connected.