JP3027135B2 - Auger drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an excavator for excavating by an auger, and more particularly to a low space which is restricted by a height such as under a pedestrian bridge, a bridge girder, an overpass, in a tunnel, an underground mall, or indoors. The present invention relates to an excavator suitable for excavation work.

[0002]

2. Description of the Related Art There is known an apparatus for performing operations such as excavation using an auger (hereinafter, collectively referred to as "excavator").
As shown in FIG. 5, the excavator (10) includes a swivel (32) on a self-propelled bogie (30), and a leader (12) supported in front of the swivel (32). And an auger driving device (14) so as to be able to move up and down. The auger drive unit (14) is connected to a so-called auger (16) such as a drilling drill, a drilling screw, and a stirring blade, and rotates the auger (16).
Work such as excavation is performed by lowering (14) along the leader (12).

As shown in FIG. 5, the auger (16) is connected to a rotary driving means (20) provided in an auger driving device (14). The rotation drive means (20) is connected to a hydraulic motor (not shown) and includes a rotatable flange (98), and the auger (16)
Is connected to the flange (99) formed at the base end. When the hydraulic motor is driven, the auger (16) rotates.

If the excavation length is longer than the total length of the auger, the excavation operation is continued while adding the auger (16) until the desired excavation length is reached.

Conventionally, this type of excavator has often been used outdoors where there is no restriction on the height, so that the total height of the leader is not particularly limited. However,
In recent years, excavation work in low spaces where the height is limited (3 to 6 m or less) such as under pedestrian bridges, bridge girders, overpasses, in tunnels, underground shopping malls, or indoors, etc. has increased. The development of an excavator that can do this is desired.
As such an excavator, as shown in FIG. 5, the applicant has proposed an excavator (10) in which a leader (12) is arranged in front of a front bracket (34). In a general excavator, the leader was placed above the front bracket, so the space below the front bracket could not be used, and a sufficient excavation stroke could not be obtained. In the machine (10), the reader (12) is arranged in front of the front bracket (34), so that the front bracket (3
The auger driving device (14) can be moved to a space below 4), and a longer excavation stroke can be secured.

[0006]

However, since the auger drive itself has a height of about 1.5 m to 2 m, even if the excavator proposed by the applicant is used, a single operation of the auger drive is required. Length that can be excavated by descent
(Excavation stroke) is the length obtained by subtracting the height of the auger drive from the total height of the leader, that is, when a leader having a total height of 4 m was used, the excavation stroke could only secure 2 m to 2.5 m ( D ₂ in FIG. 5). For this reason,
The total length of the auger that can be used must be shorter than the excavation stroke, and when excavating, a large number of augers had to be used. When the number of auger addition operations increases, there are inconveniences in that it takes much time and excavation efficiency is greatly reduced.

An object of the present invention is to provide an auger drive device capable of securing a sufficient excavation stroke even in a low space area where the working height is limited.

[0008]

In order to solve the above-mentioned problems, an auger driving device (14) of the present invention comprises a rotary driving device (20) for rotating an auger (16). It has a mounting part (80) that can be positioned at different positions in the vertical direction with respect to the driving means (20) and rotates by the driving of the rotary driving means (20), and the base end of the auger (16) is attached to the mounting part ( The auger (16) is rotatably connected to the auger (80).

[0009]

[Operation and effect] First, the auger (16) is rotated and driven (20).
Of the positioning positions, the rotation of the rotation driving means (20) and the auger driving device (1
Excavation is performed by descending in 4). Auger drive (14)
When the descent falls near the lower end of the reader (12), the rotation drive means
(20) and the drive of the auger drive (14) are temporarily stopped, the auger (16) is removed from the rotary drive means (20), the auger drive (14) is raised by a predetermined amount, and the auger (16) is lifted. The rotation driving means (20) is connected to the lower positioning position. In this state,
The excavation is restarted by driving the rotation drive means (20) and the auger drive device (14).

As described above, by changing the mounting position of the auger (16) during the descent of the auger driving device (14) and moving the auger (16) downward with respect to the rotary driving means (20),
The excavation stroke can be lengthened by the distance of the mounting position. Therefore, a longer excavation stroke than before can be ensured even in a low space area where the working height is limited. Therefore, the number of times of adding the auger (16) can be reduced, and the excavation efficiency can be improved.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An auger driving device (14) of the present invention
An embodiment attached to an excavator (10) having a leader (12) will be described. As the excavator (10) provided with a leader, a known excavator can be used, and the description thereof will be omitted as appropriate. FIG. 1 shows an excavator (10) provided with an auger driving device (14) of the present invention. In the following description, “before” means the left side of FIG. 1 and “upper” means the upper side of FIG. The excavator (10) has a swivel (3) on a self-propelled bogie (30).
2), and a front bracket (34) protrudes forward from the swivel (32). In the illustrated example, the excavator (1
In order to reduce the total height of the excavator (0), an operator's cab is not provided on the swivel (32), and the operation of the excavator (10) is performed by remote control. At the tip of the front bracket (34), a support table (38) that supports the reader (12) so as to be tiltable back and forth and left and right and to be positioned is provided.

As shown in FIG. 2, the leader (12) is a vertically long rod formed with a pair of parallel guides (40) (40) formed at the front end, and extends rearward from the back of the leader (12). A support rod (42) is projected substantially vertically toward the support base (38).
Connected to. The supporting rod (42) is provided with a hydraulically driven lifting / lowering motor (44), and the lifting / lowering motor (44) and the reader (12) are provided.
Between the sprockets (46) provided above and below the
An endless chain (48) is stretched. Chain (48)
Are arranged between the guides in parallel with the guides (40) and (40),
When the lifting / lowering motor (44) is rotated, the chain (48) runs in parallel along the guides (40) (40). In addition, the support
The detailed structure and operation of the reader (38) and the reader (12) will not be described.

The auger driving device (14) of the present invention is provided on the guides (40) of the reader (12) so as to be able to move up and down. As shown in FIGS. 1 to 3, the auger driving device (14) uses rollers (52) and (52) disposed on the back of the support plate (50) as readers (1).
The guides (40) and (40) of (2) are gripped from both sides and attached to the reader (12) with the hook (54) arranged between the rollers connected to the chain (48). On the front surface of the support plate (50), a rotation driving means (20) is provided. Rotation drive means (20)
Are two hydraulically driven rotation motors (60) and (60) respectively disposed on both front sides of the support plate (50);
(60) It is arranged between (60) and is composed of a cylindrical rotating member (62) connected to a mounting portion (80) described later. Rotation motor (6
0) (60) and the rotating member (62)
The rotating member (62) is rotatably supported by a bearing (66) provided on the protective cover (64).

A gear (68) is engraved on the peripheral surface of the rotating member (62), and the gear (68) is connected to the rotating motors (60) (60) via a speed reduction mechanism (70). It is linked. Rotation motor (60)
When the (60) is driven, the rotating member (62) rotates.

An inner surface of the rotating member (62) has a mounting portion to be described later.
A mounting groove (72) into which the mounting piece (84) of (80) is slidably fitted is formed. The mounting groove (72) is formed by a concave plate (74) having a groove formed in the cylinder inner surface of the rotating member (62) in a direction parallel to the axis. The lower end of the concave plate (74) extends below the lower surface of the cylinder of the rotating member (62), and a portion protruding below the concave plate (74) has a mounting hole for fixing the mounting portion (80). (76) has been established.

A mounting portion (80) for connecting and fixing the auger (16) is fitted to the rotating member (62). The mounting part (80)
An auger mounting member (82) having a through hole formed in the center is provided with mounting pieces (84) protruding at positions corresponding to the mounting grooves (72). As shown in FIG. 3, the mounting piece (84) is an inverted L-shaped member. At the upper end and lower end of the mounting piece (84), a mounting portion (80) is fitted to the rotating member (62). The positioning holes (85) and (86) are opened so as to communicate with the mounting holes (76) of the concave plate (74) when they are set. The central through-hole (83) of the auger mounting member (82) communicates with a through-hole (91) of the auger (16) described later, and a pump is provided at the upper end of the central through-hole (83) via a swivel (87). It is connected to a device (not shown) or the like to remove earth and sand and water flowing out of the excavated portion, and to flow cement and water into the excavated portion.

At the lower end of the auger mounting member (82) of the mounting portion (80), an auger mounting hole (88) having a hexagonal inner peripheral shape is opened in a direction parallel to the axis. An auger fixing hole (89) is formed in the hole (88) in a direction perpendicular to the axis.

The base end of the auger (16) is inserted into the auger mounting hole (88). The auger (16) is provided with a screw or a stirring blade or the like on the peripheral surface according to the work purpose over the tip or almost the entire length of the auger shaft (90).
As described above, the through-hole (91) through which concrete, earth and sand, water, and the like circulate is opened almost over the entire length. Also,
Its base end has a hexagonal convex shape that fits into the auger mounting hole (88) of the mounting part (80), and when the auger (16) is fitted into the auger mounting hole (88), the auger fixing hole is formed. An auger connection hole (93) is formed at a position communicating with (89).

Hereinafter, the excavating operation using the auger driving device (14) of the present invention will be described. First, the lifting motor (44)
To move the auger driving device (14) to near the upper end of the reader (12).

The mounting portion (80) includes a mounting member (84) and a rotating member (62).
Into the mounting groove (72) formed by the concave plate (74), the mounting hole (76) of the concave plate (74) and the lower positioning hole (86) are aligned, and the holes (76) ( By inserting a pin (95) so as to penetrate through the 86 (86), it can be attached to the upper position of the rotating member (62). In this state, the mounting portion (80) is mounted on the rotating member (62). The swivel (87) may be connected to the attachment portion (80) in advance, or may be connected after attaching the attachment portion (80).

After attaching the mounting portion (80) to the rotating member (62), as shown in FIG. 1, the base end of the auger (16) is connected to the mounting portion (80).
Into the auger mounting hole (88), and insert and fix a pin into the auger fixing hole (89) and the auger connecting hole (91). However, while the rotation motors (60) and (60) are driven to rotate the auger (16), the elevation motor (44) is rotated and the auger driving device is rotated.
(14) is lowered, and the ground is excavated.

When the auger driving device (14) reaches near the lower end of the reader (12), the rotation motors (60) and (60) and the lifting motor
Stop the rotation of (44). In this state, the pin (95) inserted into the holes (76) and (86) of the mounting portion (80) and the rotating member (62) is removed, and the auger driving device (14) is raised by a predetermined amount.
Align the positioning hole (85) on the upper side of (80) with the mounting hole (76) of the concave plate (74) and re-insert the pin (9) so that it passes through the holes (76) and (85).
5), the mounting part (80) is turned to the rotating member (62).
(Refer to FIG. 4 for the mounting state). However,
While the rotation motors (60) and (60) are driven again to rotate the auger (16), the elevating motor (44) is rotated so that the auger reaches the lowermost part of the reader (12) as shown in FIG. Drive (14)
To excavate the ground.

As described above, by replacing the auger (16), which was initially mounted at the upper position of the rotating member (62), with the lower position, the conventional excavation stroke (FIG. One excavation stroke than D ₂ )
(D _{1 in} FIG. 4) can be lengthened.

When adding a new auger (16), after the above operation, the engagement between the mounting part (80) and the rotating member (62) is released,
Move the auger drive (14) to the upper end of the reader (12), attach the mounting part (80) to the upper position of the rotating member (62),
A new auger (16) may be inserted between the mounting portion (80) and the auger (16).

When the auger (16) inserted into the ground is pulled out, the above operation may be performed in reverse.

As shown in the above embodiment, according to the auger driving device (14) of the present invention, the auger (16) is connected to the hollow rotating member (6).
In contrast to 2), since it is supported so that it can be positioned at different positions in the vertical direction, the total length of the auger drive itself can be changed according to the excavation state, and one excavation stroke can be lengthened. There is.

A cylinder device or the like having a stroke corresponding to the upper positioning hole (85) and the lower positioning hole (86) is incorporated in the auger driving device (14) to move the auger (16) continuously. You may do so.

Further, a sub-leader (13) is disposed at the tip of the front bracket (34) (see FIG. 4), and the reader (12) can be moved vertically in front of the sub-leader (13). it can. In this case, when the reader (12) is moved downward with respect to the sub-leader (13), the reader (12) can be lowered near or below the ground.
When used in combination with (14), the auger drive (14) can be moved further downward, and a longer excavation stroke can be secured.

The description of the above embodiments is for the purpose of illustrating the present invention and should not be construed as limiting the invention described in the claims or reducing the scope thereof. Further, the configuration of each part of the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made within the technical scope described in the claims.

[Brief description of the drawings]

FIG. 1 is a side view of an excavator equipped with an auger drive device of the present invention.

FIG. 2 is an exploded view of the auger driving device.

FIG. 3 is a view of the auger driving device as viewed from above.

FIG. 4 is a side view of the excavator of the present invention showing an excavation state.

FIG. 5 is a side view of a conventional excavator having an auger driving device.

[Explanation of symbols]

 (10) Excavator (12) Leader (14) Auger drive (16) Auger (20) Rotary drive means (80) Mounting part

Claims (1)

(57) [Claims] 1. Rotation driving means for rotating an auger (16)
An auger driving device comprising (20) a mounting part (80) which can be positioned at different positions in the vertical direction with respect to the rotation driving means (20), and is rotated by driving the rotation driving means (20); The base of the auger (16) is the mounting part (80)
An auger driving device, which is detachably connected to the auger.