JP2546189Y2 - Pit excavator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a pit excavator for digging a pit in the ground.

(Prior Art) FIGS. 5 and 6 show a conventional pit excavator.

First, the vertical excavator of FIG. 5 will be described. (1) is a frame of the casing press-fitting section, and the frame (1) is
Installed on the ground. (2) is a swing member, (3) is a push-in jack for suspending and supporting the swing member (2) on the frame (1), (4) is a casing, and (6) is a casing (4). An openable and closable tightening device for tightening and fixing the rocking member (2), a hydraulic jack for opening and closing the tightening device (6), and (7) a frame (1) and the rocking motion. The hydraulic jack (5) is operated in the contracting direction by the hydraulic jack interposed between the member (2) and the tightening device (6) is closed to fix the swinging member (2) to the casing (4). Then, the hydraulic jack (7) is operated in the expansion and contraction direction to reciprocally swing the swing member (2) and the casing (4) around the axis of the casing (4). The pushing member (3) is actuated in the extension direction to reciprocate the swinging member (2) about the axis and the casing (4).
And push down. Further, a hydraulic jack (7) is operated in the expansion and contraction direction by a hammer club suspended and supported by a crane, thereby causing the swinging member (2) and the casing (4) to reciprocate and swing. ) Is actuated in the extension direction to push down the swinging member (2) and the casing (4) to penetrate the casing (4) into the soil. Also, at this time, the crane winch is operated in the unreeling direction to unwind the wire, and the hammer club (5
0) is dropped, penetrates the earth and sand in the casing (4), excavates it, then operates the winch in the hoisting direction, winds up the wire, raises the hammer club (50), opens the bucket, It is designed to perform earth removal.

Next, the vertical excavator shown in FIG. 6 will be described. (1) is a frame of the casing press-fitting section, (21) is an elevating guide member of the frame (1), and (22) is an elevating guide member (21). (3) is a push-in jack for raising and lowering the elevating member (22), and (26) is pivotable on the elevating member (22) via a bearing with external teeth (25). The mounted revolving member (23) is a hydraulic motor mounted on the elevating member (22), (24) is a gear mounted on the output shaft of the hydraulic motor (23), and the gear (24) is the bearing (25). ), And the rotation of the hydraulic motor (23) is transmitted to the gear (24) → the bearing with external teeth (25) → the turning member (26) to turn the turning member (26). It has become.
(4) is a casing, (6) is the above-mentioned turning member (26)
(5) a hydraulic jack for opening and closing the tightening device (6), a hydraulic pump (29) mounted on the tightening device (6), (27) Is an internal gear provided on the revolving member (26), (28) is a gear attached to the output shaft of the hydraulic pump (29), and the gear (28) meshes with the internal gear (27). And the turning motion of the turning device (26) is transmitted to the internal gear (27) → gear (28) → hydraulic pump (29), and the hydraulic pump (29) is driven to generate the hydraulic pump (29) Pressure oil is sent to necessary hydraulic equipment. In this excavator, the turning member (26)
While rotating the casing and the casing (4), the push-in jack (3) is operated in the contracting direction, and the rotating member (22) and the casing (4) are lowered to penetrate the casing (4) into the soil. Also, at this time, the crane winch is operated in the unreeling direction to unwind the wire, and the hammer club (5
0) is dropped, penetrates into the earth and sand in the casing (4), excavates it, then operates the winch in the hoisting direction, winds the wire, raises the hammer rub (50), opens the bucket, , It is designed to perform earth removal.

(Problems to be solved by the invention) In the conventional vertical excavator shown in Figs. 5 and 6, the winch of the crane is operated in the payout direction, the wire is paid out, the hammer rub (50) is dropped, and the casing ( 4)
It penetrates into the earth and sand inside it, excavates it, and then operates the winch in the hoisting direction to wind up the wire, raise the hammer grave (50), open the bucket, and discharge the soil. There is a problem that the ground vibration occurs when falling down) and the noise is generated when discharging.

The present invention is proposed in view of the above-mentioned problems, and its object is to reduce ground vibration generated when a hamag club fell and noise generated when discharging a ground, and to reduce the length of a casing. Another object of the present invention is to provide a vertical excavator that can be dug at the same time as press-fitting without being affected by the above-mentioned conditions, and that can excavate underwater excavation without lowering work efficiency.

(Means for Solving the Problems) In order to achieve the above object, a vertical excavator according to the present invention includes a casing press-fitting section for press-fitting into the soil while swinging or rotating the casing, and An inserted vertically movable shaft, an excavating bucket attached to a lower end of the shaft, and a rotational drive of the shaft attached to an upper end of the casing. The rotational drive of the shaft is connected to the upper end of the casing. A pivot member pivotably mounted on the section, a torque transmission plate attached to the shaft and detachably engaged with the pivot member when the shaft is lowered, and a hydraulic motor mounted on an upper end of the casing; A gear mechanism for transmitting the rotation of the hydraulic motor to the turning member.

(Operation) When a normal pit excavator excavates a pit in the ground, press-fitting of a casing to inside digging to casing connection to inside digging (note that casing connection to inside digging is repeatedly performed to a predetermined depth).
After that, rebar baskets, trummy pipes are built, fresh concrete is poured, and casing is pulled out. Excavation, then raise the hammer grave, and repeatedly perform the work of discharging the earth, so that the inside digging is performed, so that noise,
Vibration is large. When it is inside the casing, there is a problem that the impact energy of the hammer rub is reduced due to buoyancy, and the excavation efficiency is significantly reduced. There is also a vertical drilling machine that performs rotary drilling with a bucket by combining an earth drilling machine with another vertical drilling machine.However, this vertical drilling machine has a mounting height of the rotary drive of the earth drilling machine. When digging inside, there is a disadvantage that the length casing cannot be used. However, the pit excavator of the present invention
The rotary drive of the shaft is mounted on the upper end of the casing. Then, the swinging member and the casing of the casing press-fitting section are lowered while swinging or rotating, so that the casing penetrates into the soil, and the above-mentioned rotation driving device is driven to rotate the rotation to the upper end of the casing. Revolving member that can be mounted → torque transmission plate → transmit to the shaft, rotate the shaft and the rotary digging bucket to excavate the earth and sand in the casing, and when excavation is over, transmit the torque to the shaft and the rotary digging bucket As the plate is raised, the rotary excavating bucket is taken out of the casing and the earth is discharged, so that the ground vibration generated when the hammer club fell and the noise generated when discharging the ground are reduced, and the length of the casing is reduced. Digging at the same time as press fitting without being influenced by
When digging underwater without losing work efficiency,
It is possible.

(Example) Next, the vertical excavator of the present invention will be described with reference to an embodiment shown in Fig. 1. (1) is a frame of a casing press-fitting section, and the frame (1) is installed on the ground. . Further, (2) is a swing member, (3) is a push-in jack for suspending and supporting the swing member (2) on the frame (1), (4).
And (6) an openable and closable fastening device for fastening and fixing the casing (4) to the swing member (2).
(5) is a hydraulic jack for opening and closing the fastening device (6), and (7) is a hydraulic jack interposed between the frame (1) and the swinging member (2). 5) operates in the retracting direction, closes the tightening device (6),
The swing member (2) is fixed to the casing (4), and the hydraulic jack (7) is operated in the expansion and contraction direction to move the swing member (2) and the casing (4) around the axis of the casing (4). Swing back and forth. Further, the pushing jack (3) is operated in the extending direction to push down the swinging member (2) and the casing (4) which are reciprocatingly swinging about the axis. (17) is a hook of a crane, (16) is a shaft suspended and supported by the hook (17), (15) is a rotary excavation bucket attached to the lower end of the shaft (16), ( 14) is a torque transmitting plate mounted on the shaft (16), (13) is a revolving member rotatably mounted on the upper end of the casing (4), and when the shaft (16) is lowered, the torque transmitting plate is (14) is the revolving member (13)
, So that it can be detachably engaged. (10) is a hydraulic motor attached to the upper end of the casing (4),
(11) is the gear attached to the output shaft of the hydraulic motor (10),
(12) is a bearing with an external gear that meshes with the gear (11), and the bearing with an external gear (12) is mounted on the revolving member (13), and the rotation of the hydraulic motor (10) is controlled by the gear (11). → Bearing with external gear (12) → Revolving member (13) → Torque transmission plate (14) → It is transmitted to the shaft (16) so that the shaft (16) and the rotary digging bucket (15) rotate. Has become. A hydraulic hose (18) extends from the hydraulic power source on the frame (1) side to the hydraulic motor (10).

Next, the operation of the vertical excavator shown in FIG. 1 will be specifically described. The casing press-fitting section (the swing member (2) and the casing (4) are reciprocally swinged about the axis of the casing (4) while the swing member (2) and the casing (4) are reciprocated. At this time, the hydraulic motor (10) is driven to rotate the gear (11) → bearing with external gear (12) → revolving member (13) → torque transmission plate (14) →
Inform the shaft (16), rotate the shaft (16) and the rotary excavating bucket (15) to excavate the earth and sand in the casing (4), and when the excavation is completed, operate the crane to operate the shaft ( 16), the rotary digging bucket (15) and the torque transmission plate (14) are raised, and the rotary digging bucket (1
5) Take out above the casing (4) and discharge the soil.

Next, the vertical excavator of the present invention will be described with reference to another embodiment shown in FIG. 2. (1) is a frame of the casing press-fitting section, (21) is a lifting guide member of the frame (1),
(22) is an elevating member supported by the elevating guide member (21) so as to be able to elevate, (3) is a push-in jack for elevating the elevating member (22), and (26) is an external tooth on the elevating member (22). (23) a swiveling member that is mounted to be swivelable via a bearing (25)
Is a hydraulic motor installed on the elevating member (22), (24)
Is a gear attached to the output shaft of the hydraulic motor (23), and the gear (24) meshes with the external gear of the bearing (25).
Rotate the rotation of the hydraulic motor (23) to the gear (24) → external toothed bearing (2
5) → The turning member (26) is transmitted to the turning member (26) to turn the turning member (26). (4) is a casing,
(6) is an openable and closable fastening device attached to the lower surface of the turning member (26), (5) is a hydraulic jack for opening and closing the fastening device (6), and (29) is the above-described fastening device ( The hydraulic pump mounted on 6), (27) is an internal gear provided on the revolving member (26), (28) is a gear mounted on the output shaft of the hydraulic pump (29), and the gear (28) is The internal gear (27) is engaged with the internal gear (27), and the turning motion of the turning device (26) is transmitted to the internal gear (2).
7) → gear (28) → transmit to hydraulic pump (29), drive the hydraulic pump (29), and send the pressure oil generated in the hydraulic pump (29) to necessary hydraulic equipment . (17) is a hook of a crane, (16) is a shaft suspended and supported by the hook (17), (15) is a rotary excavation bucket attached to the lower end of the shaft (16), ( 14) is a torque transmitting plate mounted on the shaft (16), (13) is a revolving member rotatably mounted on the upper end of the casing (4), and when the shaft (16) is lowered, the torque transmitting plate is (14) is detachably engaged with the turning member (13). Further, (10) is a hydraulic motor mounted on the upper end of the casing (4), (11) is a gear mounted on the output shaft of the hydraulic motor (10), and (12) is an outer gear meshing with the gear (11). The geared bearing, the outer geared bearing (12) is mounted on the revolving member (13), and the rotation of the hydraulic motor (10) is changed from the gear (11) to the outer geared bearing (12).
→ Revolving member (13) Torque transmission plate (14) → Shaft (16)
, The shaft (16) and the rotary digging bucket (15) rotate. (18) is the hydraulic motor (10) from the hydraulic source on the frame (1) side.
The hydraulic hose extends to

Next, the operation of the vertical excavator shown in FIG. 2 will be specifically described. The casing press-fitting section (while the revolving member (6) of the frame (1) and the casing (4) are revolved, the revolving member (6) and the casing (4) are lowered to place the casing (4) in the soil. At this time, the hydraulic motor (10) is driven to rotate the gear (11) → bearing with external gear (12) → revolving member (13) → torque transmission plate (14) →
Inform the shaft (16), rotate the shaft (16) and the rotary excavating bucket (15) to excavate the earth and sand in the casing (4), and when the excavation is completed, operate the crane to operate the shaft ( 16), the rotary digging bucket (15) and the torque transmission plate (14) are raised, and the rotary digging bucket (1
5) Take out above the casing (4) and discharge the soil.

FIG. 3 shows details of the casing press-fitting section and the tightening devices (6) and (9) provided in the excavating device shown in FIGS. ) (32), the arc-shaped members (34) and (34) are pivotally connected, and the hydraulic jack (5) is connected to the other end of each of the arc-shaped members (34) via pins (33) and (33). It is pivotally connected, and the hydraulic jack (5) is operated in the expansion and contraction direction to open and close the arc-shaped members (34) and (34) to fasten and release the casing (4).

Fig. 4 shows the details of the torque transmission plate (14) of Figs. 4 and 5, and the torque transmission plate (14) has a concave portion (41) that engages with the convex portion (41) of the turning member (13). 42) and an engaging hole (43) having a rectangular cross section that engages with the shaft (16) having a rectangular cross section. The turning movement of the turning member (13) is changed from a convex portion (41) to a concave portion (42). The engagement hole (43) is transmitted to the shaft (16) to rotate the shaft (16).

(Effects of the Invention) The pit excavator of the present invention is configured as described above.
The following effects can be achieved. That is, when a normal pit excavator excavates a pit in the ground, the press-fitting of the casing, the digging of the casing, the connection of the casing, and the digging of the casing (the casing connection to the digging are repeatedly performed to a predetermined depth), and thereafter, , Rebar baskets, trummy pipe installation-fresh concrete placement-casing pulling out, but when focusing on middle digging in these processes, the hammer club is allowed to fall freely and excavated by the impact energy at that time, The work of raising the hammer club and performing the earth removal is repeatedly performed, and digging is performed, so that noise and vibration are large. When water is present in the casing, there is a problem that the impact energy of the hammer rub is reduced due to buoyancy, and the excavation efficiency is significantly reduced. There is also a vertical drilling machine that performs rotary drilling with a bucket by combining an earth drilling machine with another vertical drilling machine.However, this vertical drilling machine has a mounting height of the rotary drive of the earth drilling machine. However, there is an inconvenience that a long casing cannot be used when digging in the middle. However, the shaft excavator of the present invention has a shaft rotary drive mounted on the upper end of the casing. Then, the swinging member and the casing of the casing press-fitting section are lowered while swinging or rotating, so that the casing penetrates into the soil, and the above-mentioned rotation driving device is driven to rotate the rotation to the upper end of the casing. Revolving member that can be mounted → torque transmission plate → transmit to the shaft, rotate the shaft and the rotary digging bucket to excavate the earth and sand inside the casing, and when the digging is completed, torque transmission with the shaft and rotary digging bucket Since the plate is lifted, the rotary excavator is taken out of the casing and the earth is discharged, so that the ground vibration generated when the hammer club fell and the noise generated when discharging the ground can be reduced. It is possible to excavate at the same time as press-fitting without being affected by the influence, and it is possible to excavate underwater excavation without lowering work efficiency.

[Brief description of the drawings]

FIG. 1 is a vertical side view showing an embodiment of a vertical excavator according to the present invention, FIG. 2 is a vertical side view showing another embodiment, and FIG.
Fig. 4 is a plan view showing details of a casing press-fitting section and a tightening device provided in an excavator, Fig. 4 is a plan view showing details of a torque transmission plate, and Fig. 5 shows an example of a conventional shaft excavator. FIG. 6 is a vertical sectional side view showing another example of a conventional vertical excavator. (1) ... casing press-fitting section, (2) ... swinging member of casing press-fitting section (1), (4) ... casing, (6) ... turning member of casing press-fitting section (1), (10) to (14) ... Shaft rotary drive, (1
5) Drilling bucket, (16) Shaft.

Claims (1)

(57) [Scope of request for utility model registration] A casing press-fitting section for press-fitting into the soil while swinging or rotating the casing; a vertically movable shaft inserted into the casing; an excavating bucket attached to a lower end of the shaft; A rotary drive device for the shaft attached to the upper end of the casing, and a rotary member for rotatably mounting the rotary drive device for the shaft to the upper end portion of the casing; and A torque transmission plate detachably engaged with the turning member, a hydraulic motor mounted on an upper end of the casing, and a toothed wheel mechanism transmitting rotation of the hydraulic motor to the turning member. Pit excavator.