JP2000291362A - Rotary excavating member connection device for foundation construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection device capable of allowing a connecting and disconnecting operation of a rotary excavating member to be performed easily in a rotary driving device so as to ensure the safety of the operation. SOLUTION: This rotary excavating member connecting device comprises a connection adapter 12 having an outer periphery on which a connection hook 15 is installed protrusively and connected to a rotary excavating member 6 and a connecting cylindrical member 14 which is fixed to a rotary output member 13 of a rotary driving device 5 and to which the connection adapter 12 can be inserted. A hook locking groove to prevent the adapter 12 from being rotated by the locking of the connection hook 15 at the time of insertion of the connection adapter 12 is provided in the connecting cylindrical member 14. In addition, an annular opening and closing shutter 20 capable of being rotated between a closed position where the hook locking groove is closed to stop the axial movement of the adapter 12 and an open position where the hook locking groove is open to release the connection hook 15 is provided also in the connecting cylindrical member 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foundation construction machine for digging and drilling the ground while rotating a rotary excavating member such as a casing or an auger screw by a rotary driving device. The present invention relates to a connecting device for detachably connecting to a connecting device.

[0002]

2. Description of the Related Art A casing and an auger screw are detachably connected to a rotary drive device generally called an auger machine which is mounted on a reader so as to be able to move up and down. . Although the height of the leader is limited to about 30 m, the depth of the excavation hole may be planned to be several times the leader height of 50 m to 100 m in the construction plan. As described above, in the case of a drilling plan deeper than the height of the leader, drilling and drilling is generally performed with a casing or the like within the effective stroke of the rotary drive device mounted on the leader. In that case, after digging to a certain depth in the casing etc., the casing etc. is once cut off from the rotary drive, and the upper end of the new casing etc. is raised with the rotary drive raised to the required height along the reader. It is necessary to perform an additional operation of connecting to a rotary drive device and connecting a lower end portion thereof to an upper end portion of a preceding casing or the like embedded in the ground.

[0003]

Conventionally, when adding a casing or the like as described above, a worker climbs to a lower portion of a rotary drive device whose required height has been raised by a gondola or the like incorporated in a side of a leader. The upper end of the casing, etc. was connected to the output shaft of the rotary drive, but this connection work was performed while fitting the upper end of the casing, etc., to the output shaft of the rotary drive at a considerable height from the ground. Since the pins are inserted into the through holes of both fitting portions, the operation is performed at a high place, so that the connecting operation is difficult to perform, which is very dangerous.

SUMMARY OF THE INVENTION The present invention provides a connecting device for a rotary excavating member in a foundation work machine capable of easily and easily connecting and disconnecting a rotary excavating member such as a casing to a rotary driving device and ensuring safety of the operation. The purpose is to do. In addition, as the rotation driving device referred to here, in addition to the rotation driving device generally called an auger machine, for example, a full-circle rotation driving device for pushing a large-diameter casing having a diameter of 1 to 2 m into the ground while rotating the casing. A device (all-casing machine) or a similar rotary drive can be used. This full-circle rotation drive device and the like are generally installed on the ground, but in the present invention, they are installed so as to be able to move up and down a predetermined stroke along the reader.

[0005]

According to a first aspect of the present invention, there is provided a connecting device for a rotary excavating member in a machine for foundation work, wherein a connecting hook 15 is protruded on an outer periphery, and the rotary excavating member 6 such as a casing.
Connection adapter 12 detachably connected to the upper end of the
And a connecting cylindrical member 14 fixed to the rotation output member 13 of the rotary excavating member rotary drive device 5 that can move up and down along the reader 4 and into which the connecting adapter 12 can be inserted from the lower end side. The hook 14 is provided with a hook engaging groove 19 for engaging the connecting hook 15 when the connecting adapter 12 is inserted and preventing the rotation of the adapter 12, and the connecting hook 15 is confined in the hook engaging groove 19. A circle rotatable between a closed position where the hook engaging groove 19 is closed to prevent the adapter 12 from moving in the axial direction, and an open position where the hook engaging groove 19 is opened to release the connecting hook 15. It is characterized in that an annular opening / closing shutter 20 is provided.

According to a second aspect of the present invention, in the apparatus for connecting a rotary excavating member in a machine for foundation work according to the first aspect, the connecting adapter 12 comprises a cylindrical body 12a, and a plurality of connecting adapters are provided at the upper end of the outer peripheral surface. The hooks 15 are protruded at predetermined intervals in the circumferential direction, and are fitted at the lower end of the cylindrical main body 12a to the fitted portion 6a provided at the upper end of the rotary excavating member 6 and screwed to each other by screws 16. It is characterized in that a joining portion 12b is formed.

According to a third aspect of the present invention, there is provided a rotary excavating member connecting apparatus for a foundation work machine according to the first or second aspect,
The lower end of the connecting cylindrical member 14 is a trumpet-shaped insertion guide 1.
7a is formed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows substantially the entirety of a foundation construction machine, and a self-propelled body 1 has a back stay 2 and a support cylinder 3 mounted thereon. The reader 4 is held in a vertical posture via a rotary actuator, and a rotary drive device 5 is supported by the reader 4 so as to be able to move up and down a required stroke. The rotary drive device 5 is a rotary drive device larger than a so-called auger machine, and rotationally drives a large-diameter casing 6 (rotary excavating member) connected to the rotary drive device 5 by a connecting device 11 of the present invention described later. It has become.

As shown in FIGS. 1 and 2, a rotary drive device 5 for rotating the casing 6 is supported and guided by a device main body 7 and a guide rail 4a of a reader 4 and is driven up and down by a chain drive type driving means 8a. Lifting body 8
And a pair of connecting members 9, 9 for vertically connecting the apparatus main body 7 to the elevating body 8. As shown in FIG. 2B, the apparatus main body 7 is guided up and down by a pair of left and right guide posts 10, 10 erected on the ground.

Next, the connecting device 11 according to the present invention will be described. The connecting device 11 includes a connecting adapter 12 detachably connected to an upper end portion of the casing 6 and a rotation of the device main body 7 in the rotary drive device 5. Output flange 13
(Rotational output member), and the connecting cylindrical member 1 in which the connecting adapter 12 is inserted from the lower end side.
And 4.

As can be seen from FIGS. 4 and 6, the connecting adapter 12 comprises a cylindrical main body 12a, and for example, four connecting hooks 15 are formed at the upper end of the outer peripheral surface of the cylindrical main body 12a by 90 degrees in the circumferential direction. And a casing 6 is provided at the lower end of the cylindrical main body 12a.
A female fitting portion 12b is provided which can be fitted to a male fitting portion (fitted portion) 6a provided at the upper end portion.

When the connecting adapter 12 is connected to the casing 6, as shown in FIGS. 6A and 6B, a male fitting at the upper end of the casing 6 is fitted to a female fitting portion 12b at the lower end thereof. The fitting portion (fitted portion) 6a may be fitted, and the screw 16 may be screwed from the insertion hole b of the female fitting portion 12b into the screw hole a of the male fitting portion 6a. At the lower end of the casing 6, there is provided a female fitting portion 6b capable of fitting with the male fitting portion 6a on the upper end side. As described above, the male fitting portion 6a
May be fitted to the female fitting portion 6b and fixed with the screw 16.

As shown in FIGS. 2 to 5, the connecting cylindrical member 14 comprises a cylindrical member main body 17 and a mounting flange 18 fixed to the upper end of the main body 17. A concentrically mounted and fixed to the rotation output flange 13 (rotation output member) of the main body 7 by bolts,
A trumpet-shaped insertion guide 1 is provided at the lower end of the cylindrical member body 17.
7a are formed. 2 and FIG.
Is a fixing frame attached to a fixing member (not shown) of the apparatus main body 7, and this fixing frame is
It is guided up and down to 0,10.

Each of the connecting hooks 15 engages with the cylindrical member main body 17 when the connecting adapter 12 is inserted to prevent the rotation of the connecting adapter 12.
The shutter closing position (FIG. 4) in which each hook engaging groove 19 is closed so that the connecting hook 15 is closed in the hook engaging groove 19 to prevent the connecting adapter 12 from moving in the axial direction. An annular opening / closing shutter 20 that is rotatable between a shutter opening position (see the upper half in FIG. 4) and a shutter opening position (see the upper half in FIG. 4) in which each hook engagement groove 19 is opened to release the connecting hook 15 is detached. It is provided concentrically with the member main body 17.

The annular shutter 20 is shown in FIG.
As can be seen from FIG. 5, the four hooks provided on the cylindrical member main body 17 engage with the shutter guide grooves 21 provided on the outer peripheral surface of the cylindrical member main body 17 so as to be rotatable. Openings 22 through which the connecting hooks 15 of the connecting adapter 12 can be inserted are provided at positions corresponding to the grooves 19, respectively. Each opening 22 has a hook engaging position at a shutter open position (see the upper half in FIG. 4). It is coincident with the entrance groove 19 and is located at a position shifted by a certain angle in the circumferential direction from the hook engagement groove 19 at the shutter closing position (see the lower half of FIG. 4).

As shown in FIG. 4, two sets of cylinder units 23 for rotating the annular opening / closing shutter 20 between a shutter opening position and a shutter closing position are provided with the connecting cylindrical member 14 and the opening / closing shutter 20. It is interposed between them. Each cylinder unit 23 includes a hydraulic cylinder 2
4, the opening and closing shutter 20 is opened and closed by opening and closing the opening and closing shutter 20. The cylinder body 24a of the cylinder 24 is attached to the cylindrical member body 17 via the bracket 25,
A piston rod 24b is attached to the opening / closing shutter 20 via a bracket 26. As shown in FIG. 4, the hydraulic cylinders 24, 24 of the two sets of cylinder units 23, 23 are rotationally symmetrically disposed at diametrically opposite positions of the annular opening / closing shutter 20.

FIG. 3 shows a state in which the connecting adapter 12 is inserted into the connecting cylindrical member 14 by an imaginary line. As can be seen from this figure, the connecting adapter 12 is inserted into the connecting cylindrical member 14. When inserted, adapter 12
The upper end of the connecting hook is in contact with the mounting flange 18 of the connecting cylindrical member 14, and the insertion position is regulated. At this time, each connecting hook 15 is higher than the opening / closing shutter 20,
When the opening / closing shutter 20 is rotated to the closed position, each connecting hook 15 is locked in the hook engaging groove 19, and the axial movement of the connecting adapter 12 is prevented. 5 is linked to the rotation output flange 13 (rotation output member) of the apparatus main body 7 in FIG.

In this embodiment, the cylinder unit 23
The hydraulic cylinder 24 is driven to expand and contract by operating the hydraulic cylinder 24 to open and close the annular opening / closing shutter 20. However, the annular opening / closing shutter 20 is manually rotated directly without using such a cylinder unit 23. By performing the moving operation, the shutter 20 can be opened and closed. In this manual operation, for example, a handle with a stopper may be provided at a required portion of the opening / closing shutter 20, and the operator may climb the leader and rotate the opening / closing shutter 20 with the handle at a required height position. Further, the opening / closing shutter 20 may be locked by the stopper at the shutter closing position.

Next, a method of using the connecting device 11 according to the present invention as described above will be described with reference to FIGS. 7 and 8 and other drawings.

First, as shown in FIG. 7, the connecting adapter 1 is attached to the upper end of the casing 6 (rotary excavating member) on the ground.
2 and the connection adapter 12 is lifted together with the casing 6 by a wire 37 (or another crane) hanging from the top of the reader 4 as shown in FIG. As described above.

In this connection operation, the casing 6 having the connection adapter 12 connected to the upper end thereof is lifted by the wire 37 as shown in FIG. Move the connecting adapter 1 while moving the rotary drive 5 downward at that position.
2 may be inserted into the connecting cylindrical member 14 of the connecting device 11, or the casing 6 to which the connecting adapter 12 is connected may be set up at a predetermined position on the ground as shown in FIG. When the vehicle body 1 is turned together with the reader 4 so that the apparatus main body 7 comes directly above the connection adapter 12 and the apparatus main body 7 is moved downward in this state, the connection adapter 12 is inserted into the connection cylindrical member 14. Good. At the time of this insertion, the connecting hook 15 of the connecting adapter 12 is applied to the trumpet-shaped insertion guide 17a at the lower end of the connecting cylindrical member 14, and the casing 6 side or the connecting cylindrical member 14 side is appropriately rotated, and Hook 15 into hook engagement groove 19
In this state, the connection adapter 12 may be inserted up to the upper limit position in the connection cylindrical member 14 as shown by the phantom line in FIG. Since the lower end of the connecting cylindrical member 14 forms the trumpet-shaped insertion guide 17a, the insertion of the connecting adapter 12 is facilitated.

As described above, the connection adapter 1 is prevented from rotating by the connection hook 15 being engaged in the hook engagement groove 19.
2 is inserted to a predetermined position in the connecting cylindrical member 14,
By operating the cylinder unit 23 from the driver's seat of the self-propelled body 1, the opening / closing shutter 20 is turned to the closed position. As a result, the connecting hook 15 of the connecting adapter 12 is locked in the hook engaging groove 19 as shown in FIG. 3, so that the connecting adapter 12 is prevented from moving in the axial direction, and the connecting adapter 12 is driven to rotate. The device body 7 of the device 5
Linked with

When the connecting adapter 12 is connected to the apparatus main body 7 of the rotary driving device 5 as described above, the casing 6 is rotated via the connecting adapter 12 while lowering the rotary driving device 5 as shown in FIG. While digging and excavating the ground. At this time, the thrust and the rotating force of the rotary drive device 5 are transmitted from the connecting cylindrical member 14 and the opening / closing shutter 20 to the connecting adapter 12 via the connecting hook 15 and transmitted to the casing 6 via the connecting adapter 12. You.

When the casing 6 has been excavated to a predetermined depth in the ground, the cylinder unit 23 is operated to rotate the opening / closing shutter 20 to the open position, and then, as shown in FIG. By raising
The connecting adapter 12 and the rotary drive device 5 are separated, and then the connecting adapter 12 is removed from the casing 6.

The detached connecting adapter 12 is connected to a new casing 6 at another place (see FIG. 7), and is lifted by a wire 37 hanging from the top of the reader 4 as shown in FIG. 7 is connected to the device main body 7 of the rotary drive device 5 in the same manner as in the case of FIG. The casing 6 connected to the apparatus main body 7 of the rotary drive device 5 as shown by the phantom line in FIG. 8 is connected to the preceding casing 6 whose upper end protrudes above the ground.
Perform the addition of

After adding the succeeding casing 6 to the preceding casing 6 in this way, as shown in FIG. 8, the ground is excavated while rotating the casing 6 through the connecting device 11 while lowering the rotary drive device 5. I will make a hole. After that, while the casing 6 is replenished in the same manner as described above, the casing 6 performs drilling and drilling to a predetermined depth.

As can be understood from the above description, by using the connecting device 11 according to the present invention, the operation of connecting the casing 6 to the rotary drive device 5 and the operation of adding the casing 6 can be performed independently of the work at a high place. It can be performed by the operation of the driver's seat of the self-propelled body 1 and the simple manual operation on the ground, so that the safety of the operation can be ensured.

Further, in the above embodiment, the case where the casing 6 is used as the rotary excavation member has been described, but an auger screw may be used as the rotary excavation member. In the case of the auger screw, an auger machine that can be driven up and down along the reader 4 can be applied as a rotary drive device, and the connecting cylindrical member 14 is attached to a rotary output member of the auger machine. What is necessary is just to use what can be detachably connected to the upper end part of an auger screw as the connection adapter 12.

[0029]

According to the connecting device of the present invention, a connecting adapter is provided with a connecting hook projecting from the outer periphery and detachably connected to an upper end portion of a rotary excavating member such as a casing.
A connecting cylindrical member fixed to the rotation output member of the rotary drive device and capable of inserting a connecting adapter from the lower end side, a hook engaging groove provided on the connecting cylindrical member, and a rotatably provided on the connecting cylindrical member. When the rotary excavating member is connected to the rotary drive device, the connecting adapter connected to the state portion of the rotary excavating member is inserted into the connecting cylindrical member. The open / close shutter is rotated to the closed position, and when the rotary excavation member is separated from the rotary drive, the open / close shutter may be rotated to the open position. The work of adding the rotary excavation member becomes easy and easy, and even when the work at a high place is forced, the work can be performed safely.

According to the connecting device of the second aspect, the connecting adapter is composed of a cylindrical body, and a plurality of connecting hooks are protruded from the upper end of the outer peripheral surface at predetermined intervals in the circumferential direction. The lower end portion of the main body has a fitting portion which is fitted to a fitted portion provided at the upper end portion of the rotary excavating member such as a casing and is screwed to each other. The connection of the adapter is facilitated, and the work of connecting / disconnecting the rotary excavation member and the work of adding the rotary excavation member can be performed more efficiently.

According to the connecting device of the third aspect, since the lower end of the connecting cylindrical member forms the trumpet-shaped insertion guide, the connecting adapter is inserted, particularly for connecting to the hook engaging groove. The hook is easily engaged.

[Brief description of the drawings]

FIG. 1 is a side view showing substantially the entire machine for foundation work provided with a connecting device according to the present invention.

FIG. 2A is a side view of a rotary driving device having a connecting device, and FIG. 2B is a front view thereof.

FIG. 3 is an enlarged view of the connecting device according to the present invention.

FIG. 4 is a sectional view taken along line XX of FIG. 3;

FIG. 5 is a side view of the connecting device according to the present invention.

FIG. 6A is an enlarged sectional view of a casing and a connection adapter connected to an upper end of the casing, and FIG. 6B is an enlarged view of a portion indicated by an arrow Y in FIG.

FIG. 7 is an explanatory view showing a method of using the connecting device of the present invention.

FIG. 8 is an explanatory view showing a method of using the connecting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Self-propelled vehicle body 4 Leader 5 Rotation drive device 6 Casing (rotation excavation member) 7 Device body of rotation drive device 8 Elevating body 9 Connection member 10 Guide support 11 Connection device 12 Connection adapter 13 Rotation output flange (Rotation output member) 14 Connecting cylindrical member 15 Connecting hook 16 Screw 17 Cylindrical member main body 17a Insertion guide 19 Hook engaging groove 20 Opening / closing shutter 22 Opening

Claims (3)

[Claims] 1. A connecting adapter having a connecting hook protruding from an outer periphery thereof and detachably connected to an upper end portion of a rotary excavating member such as a casing, and a rotation of a rotary driving device for the rotary excavating member capable of moving up and down along a leader. A connection cylindrical member fixed to the output member and capable of inserting a connection adapter from a lower end side, wherein the connection hook is engaged with the connection cylindrical member when the connection adapter is inserted to prevent rotation of the adapter. A hooking groove is provided, and the hook hooking groove is closed so that the connecting hook is locked in the hook hooking groove to prevent the adapter from moving in the axial direction. A connecting device for a rotary excavating member in a machine for foundation work, comprising an annular opening / closing shutter rotatable over an open position at which a hook for detaching is provided. 2. A connecting adapter comprising a cylindrical body, a plurality of connecting hooks protruding at an upper end portion of an outer peripheral surface thereof at predetermined intervals in a circumferential direction, and a rotating excavating member provided at a lower end portion of the cylindrical body. The connecting device for a rotary excavating member in a machine for foundation work according to claim 1, wherein a fitting portion fitted to a fitted portion provided at an upper end portion and screwed to each other is formed. 3. The connecting device for a rotary excavating member in a foundation construction machine according to claim 1, wherein a lower end portion of the connecting cylindrical member forms a trumpet-shaped insertion guide.