JP2002081286A - Auger head changing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce much labor and time when changing a heavy auger head while supporting the heavy auger head by plural operators at conventional auger head changing work. SOLUTION: This auger head changing device is composed of a head support part 2c for supporting the auger head 4 in a changing position, a longitudinally movable carriage 1 and a laterally movable carriage 2 for moving the head support part 2c in the horizontal direction. At removing work of the auger head 4, the head support part 2c is arranged under an auger, and supports the auger head 4 to be removed. At installing work of the auger head 4, the head support part 2c is arranged under the auger, and supports the auger head 4 to be installed. At excavating time by the auger, the head support part 2c can be retreated to a position noninterfering with the auger by the longitudinally movable carriage 1. Thus, the operator can change the auger head 4 by oneself, and work time can be remarkably shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auger head exchanging device provided in an excavator having an auger and supporting the auger head when exchanging the auger head at the tip of the auger.

[0002]

2. Description of the Related Art Generally, in a work for press-fitting a pile such as a sheet pile into a hard ground, a pile press-in / draw-out machine provided with an earth auger for excavating the hard ground before the press-fitting of the pile is used. The auger head attached to the tip of the screw rod of the earth auger wears hard because the hard ground is directly excavated. Therefore, the auger head is to be replaced when the auger head is worn by a certain amount so as not to lower the excavation efficiency. Also, when the geology of the ground changes during excavation, the auger head may be replaced in accordance with the geology. In the conventional auger head replacement work, since the auger head itself is heavy, a plurality of workers support the auger head, position the auger head, attach and remove the earth auger to and from the screw rod tip insertion hole. It is carried out.

[0003]

As described above, in the conventional auger head replacement work, since the auger head itself is heavy, a plurality of workers are required to support the auger head, which leads to labor costs. Had also increased. In addition, the insertion portion of the auger head is inserted into the insertion end of the screw rod tip of the earth auger by the joint work of the workers. At that time, since the pins for connecting the screw rod and the auger head are inserted while aligning the holes provided therein, positioning is difficult and consumes a lot of time. I was

[0004] It is an object of the present invention to provide an auger head exchanging apparatus which can reduce labor costs, facilitate positioning, and shorten auger head exchanging time during auger head exchanging work. is there.

[0005]

According to a first aspect of the present invention, there is provided an auger head exchanging apparatus for supporting an auger head when exchanging an auger head at an auger tip of an excavator. When replacing the auger head,
It has a head support portion that is arranged below the auger and supports the auger head at the auger head replacement position, and is provided with moving support means that allows the head support portion to move freely.

[0006] According to the above configuration, for example, when the auger head is removed from the auger, the head support is disposed below the auger and supports the auger head to be removed. Then, after the auger head is removed, the auger is pulled up, so that the auger head and the auger are separated from each other. When the auger head is mounted, the head supporter supports the auger head below the auger. Then, by lowering the auger in a state where the auger head is removed, the auger and the auger head can be attached, and the operation of attaching the auger head to the auger can be performed. The moving support means,
When not replacing the auger head, evacuate the head support to a position that does not affect excavation by the auger, or perform alignment so that the auger head and auger position overlap vertically when replacing the auger head. To support the head support.

According to the auger head changing device, since the head supporting portion always supports the auger head, there is no need for a worker for supporting the auger head. Reduce
Labor costs can be reduced. Further, since the head supporting portion can be moved in the horizontal direction by the moving supporting means while always supporting the auger head, the positioning can be easily performed and the working time can be drastically reduced. In addition, instead of moving the auger up and down at the time of exchanging the auger head on the excavator side, when the auger head is pulled out from the auger or when the auger head is inserted into the auger, the head support portion can be moved up and down relative to the excavator. Alternatively, the head support may be moved up and down. Alternatively, the excavator may move the auger in the horizontal direction to perform a part of the positioning of the auger head and the auger. Also, place the head support at a position where it is not affected by the auger excavation,
The auger may be moved from the excavation position to the position of the head support on the excavator side. Further, the excavator may be one attached to a well-known pile press-in and pull-out machine.

According to a second aspect of the present invention, there is provided an auger head exchanging apparatus according to the first aspect, wherein the excavating apparatus is a pile press-in machine which presses a pile by taking a reaction force from an existing pile. The moving support means is provided, and can be attached to a pile press-in machine or a work bench provided in the pile press-in machine.

According to the above configuration, the auger head can be easily replaced even in a pile press-fitting machine having an excavator. When the auger is moved vertically or horizontally relative to the head support, the excavator may be moved vertically or horizontally by a pile press-in / draw-out machine.

According to a third aspect of the present invention, there is provided an auger head exchanging apparatus according to the first or second aspect, wherein the moving support means includes a link portion having a connecting portion rotatably connected to each other. Wherein the head support portion is connected to the link portion.

According to the above construction, for example, the head support is moved between the replacement position of the auger head and the retracted position which does not hinder the excavation by rotating the link portion right and left with respect to the excavator. Can be. Further, the head support can be moved in the X-axis direction and the Y-axis direction by rotating the link portion left and right with respect to the excavator and rotating the head support portion right and left with respect to the link portion. The auger head and the auger can be aligned at the time of replacement. According to the auger head exchanging device, since the moving support means is constituted by the connected link portions, the structure is simple and the number of components is small, so that the manufacturing cost is reduced.

An auger head exchanging device according to a fourth aspect of the present invention is the auger head exchanging device according to the first or second aspect, wherein the moving support means includes a movable base which is slidable in a substantially horizontal direction. It is characterized by the following.

According to the above construction, the auger is moved by the excavator, and the head support is moved in the horizontal direction on the moving table, thereby aligning the head support with the auger. The auger head can be removed on the part. Alternatively, it is possible to align the auger head on the head support and the auger to which the auger head is not attached, lower the auger to the auger head replacement position, and perform the mounting work between the auger head and the auger. it can.

According to a fifth aspect of the present invention, there is provided an auger head exchanging apparatus according to any one of the first to fourth aspects, wherein the head supporting portion rotatably supports the auger head. An auger head exchanging device, characterized in that: According to the above configuration, the head support portion includes:
To rotate the auger head while supporting the auger head, insert a pin for connecting the screw rod and the auger head when inserting the insertion portion of the auger head into the insertion end of the screw rod tip of the earth auger. Therefore, the positioning operation of the hole positions provided in each can be easily performed.

According to a sixth aspect of the present invention, there is provided an auger head exchanging apparatus as set forth in any one of the first to fifth aspects, wherein the auger head exchanging apparatus has moving support means provided with a plurality of the head supporting portions. Or, each having a plurality of moving support means provided with a head support portion, some of the plurality of head support portions support an auger head to be attached to the auger at the time of auger head replacement,
The remaining part of the plurality of head supports supports the auger head removed from the auger when the auger head is replaced.

According to the above arrangement, one of the head supports supports the auger head detached from the excavator,
The auger head is removed and moved to a position out of the way of the drilling rig. Next, the other head support on which a new auger head to be attached to the excavator is mounted is moved to the auger head replacement position, and the auger head is attached. Accordingly, since the auger head removal operation and the augmentation operation can be performed continuously, the efficiency of the auger head replacement operation can be improved.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an auger head exchanging device according to the present invention will be described below with reference to the drawings. Here, a pile press-in and pull-out machine 10 shown in FIGS. 4 and 5 includes a saddle 12 having a clamp 11 for grasping a sheet pile 3 at a lower portion,
A slide base 13 that slides back and forth with respect to the saddle 12, a mast 14 that is rotatable on the slide base 13, and an earth auger 20 with a casing for excavation.
(Excavator) and a lifting unit 15 that can be raised and lowered with respect to the mast 14 by a hydraulic cylinder, and has a chuck that grips the sheet pile 3 and the earth auger 20. Here, the pile press-in / pull-out machine 10 grasps the already buried sheet pile 3 with the clamp 11 and takes a reaction force from the sheet pile 3 to press-fit and pull out the sheet pile 3 grasped by the chuck of the lifting unit 15. A well-known machine that can perform. Also,
The pile press-in / draw-out machine 10 is capable of self-running on a buried sheet pile 3. A screw rod 23 (auger) having a screw 22 having a bit at the tip and being spirally provided vertically along the outer periphery is rotatably provided in a casing 21 by a hydraulic motor, and is lifted and lowered by a hydraulic cylinder. It is possible. Here, the earth auger 20 with a casing is a device that excavates the ground in advance when the sheet pile 3 is pressed into the ground.

As shown in FIGS. 1, 2 and 3, the first embodiment of the present invention
The auger head exchanging device as an example includes a front-rear movable table 1 movable in the traveling direction of the pile press-in / pull-out machine 10 and a traveling direction of the front-rear movable table 1 installed on the front-rear movable table 1 (hereinafter, referred to as “moving direction”) A direction almost perpendicular to the front-back direction),
A left and right movable base 2 movable substantially horizontally (hereinafter referred to as a left and right direction), and a rotatable head support 2 for installing an auger head 4 provided on the left and right movable base 2
c. The front and rear moving table 1 and the left and right moving table 2 are the moving support means and are set on the work stage 40. The work stage 40 is mainly composed of a base stage attached to a stage attachment portion 41 that can be attached to and detached from the saddle 12 of the pile press-in / pull-out machine 10, and other stages can be detached therearound.
This is a well-known facility. A rail 5 extending in the front-rear direction is provided on the work stage 40, and the front-rear movable table 1 is installed on the rail 5 so as to be movable by a roller 1a. And, in the front and rear movable table 1,
A stopper 1b for fixing the front and rear movable table 1 at the replacement position of the auger head 4, and a rail 1 extending in the left-right direction
c is provided. The left and right moving table 2 is installed on the rail 1c in a state where the left and right moving table 2 can be moved by a roller 2a. Further, the left and right movable table 2 is provided with a stopper 2b for fixing the left and right movable table 2 at the replacement position of the auger head 4. The present invention is not limited to the above-described example, and the auger head exchanging device shown in FIGS. Anything is acceptable. The auger head exchanging device does not necessarily need to be installed on the work stage 40 connected to the pile press-in / pull-out machine 10.
A rail 5 fixed to the vicinity may be provided, and the front and rear movable table 1 may be moved on the rail 5.

Next, as shown in FIG. 4, an auger head replacement method using an auger head replacement device will be described below. First, the operation of attaching the auger head 4 to the earth auger 20 of the pile press-in / pull-out machine 10 will be described.
First, a worker installs the auger head 4 on the head support 2c. At this time, the front and rear movable table 1 and the left and right movable table 2 are fixed by pressing the respective stoppers 1b, 2b against the respective rails 5, 1c. Next, the stopper 1b pressed against the rail 5 on the work stage 40 is released, and the roller 1a of the front and rear movable table 1 is made rotatable. The roller 1a engaged with the rail 5 rotates, and the front and rear movable table 1, which is movable by rotating, is moved along the rail 5 in the front and rear direction, so that it is on the head support 2c. The insertion portion of the auger head 4 is aligned with the insertion port position of the tip end of the screw rod 23 of the earth auger 20 only in the front-rear direction. Subsequently, the stopper 1b of the movable table 1 is pressed against the rail 5 again, thereby fixing the movable table 1.
Next, the stopper 2b of the left and right moving table 2 pressed against the rail 1c on the front and rear moving table 1 is released,
The roller 2a engaged with the rail 1c is made rotatable. Then, by moving the left and right movable table 2 including the head support portion 2c on which the auger head 4 is installed along the rail 1c in the left and right direction, the auger head 4 on the head support portion 2c is moved. Insert the
The left and right directions are adjusted to the insertion port position of the tip end of the screw rod 23 of the earth auger 20. Subsequently, the stopper 2b of the left-right movable base 2 is pressed against the rail 1c again, thereby fixing the left-right movable base 2.

Next, the head supporting portion 2c is rotated, and the pin insertion opening 4 formed in the insertion portion of the auger head 4 is rotated.
a is matched with the pin insertion opening 23a formed in the insertion end of the screw rod 23 at the tip of the earth auger 20. Then, the elevating part 15 of the pile press-in / pull-out machine 10 is lowered together with the earth auger 20 gripped by the chuck inside the elevating part 15, and the screw rod 23 is inserted into the insertion part of the auger head 4. Insert.
After insertion, the pin insertion opening 4a formed in the insertion portion of the auger head 4 and the pin insertion opening 23 formed in the insertion end of the tip end of the screw rod 23 of the earth auger 20.
By inserting a pin (not shown) into a and tightening and fixing a screw (not shown) for retaining the pin, the mounting operation of the auger head 4 is completed. Regarding the removal work, basically, the mounting work pin insertion ports 4a, 2a
3a is omitted, and the screw rod 23
The above sequence may be reversed in a state where the auger head 4 at the distal end is always supported by the head support 2c.

Therefore, according to the first embodiment of the present invention, when the auger head is replaced, the head supporting portion 2c for always supporting the auger head 4 and the head supporting portion 2c can be moved in the horizontal direction. Since the front and rear movable table 1 and the left and right movable table 2 are provided, positioning is performed in the auger head replacement operation, so that a supporting worker is not required.
Therefore, labor costs in the auger head replacement operation can be reduced. As described above, it is needless to say that the positioning becomes easier and the working time can be remarkably reduced as compared with the work performed by a plurality of workers. In addition, in the front-back direction alignment, the front-rear movable table 1 is used as it is, and in the left-right direction alignment, the mast 14 of the pile press-in / pull-out machine 10 is used instead of the left-right movable table 2, and the mast 14 is turned. The left and right positions can be adjusted to perform the replacement work of the auger head 4.

As shown in FIGS. 5 and 6, the auger head exchanging apparatus according to the second embodiment of the present invention has a bracket 30 provided on a pile press-in / pull-out machine main body.
(A link portion) is rotatably fixed in the horizontal direction with a pin 31. Similarly, the arm 32 and an extension portion 33a extending substantially in the horizontal direction from the auger head support 33 are connected to the pin 31.
And is fixed so as to be freely rotatable in the horizontal direction. Further, the auger head support 33 is provided with a head support 33b having a mechanism for installing the auger head 4 and rotating the auger head 4 in the horizontal direction. A configuration in which a sliding device such as a cylinder device is provided on a bracket portion or the like, and the auger head support base 33 is moved up and down, whereby the insertion portion of the auger head 4 is inserted into the insertion hole of the tip end of the screw rod 23 of the earth auger 20. You may do it. Also, the present invention
The arm 32 only needs to be rotatable in the horizontal direction in the vicinity of the pile press-in / pull-out machine 10, so that the arm 32 is attached to fixing means in the vicinity of the pile press-in / pull-out machine 10, the work stage 40 attached to the pile press-in / pull-out machine 10, and the like. You may be.

Next, as shown in FIGS. 5 and 6, an auger head replacement method using an auger head replacement device will be described below. First, pile press-in and pull-out machine 1 for auger head 4
A description will be given of the work of attaching the cover to zero. First, the worker
The auger head 4 is set on the auger head support 33. Then, the insertion portion of the auger head 4 installed on the auger head support 33 is connected to the earth auger 2.
0, the joint between the bracket 30 and the arm 32 and the joint between the arm 32 and the extension 33a of the auger head support 33 are rotated to match the insertion opening of the screw rod 23 at the tip of the screw rod 23. The position of the auger head support is adjusted on the coordinates in the axial direction and the Y-axis direction.

Next, when the insertion portion of the auger head 4 is adjusted to a position where it can be inserted into the insertion opening at the tip of the screw rod 23, the rotatable head support portion 33b on the auger head support base 33 is rotated. Then, the pin insertion opening 4a formed in the insertion portion of the auger head 4 is matched with the pin insertion opening 23a formed in the insertion end of the screw rod 23 at the tip of the earth auger 20. Then, the lifting part 15 of the pile press-in / pull-out machine 10 is lowered together with the earth auger 20 gripped by the chuck inside the lifting part 15, and the screw rod 2 is inserted into the insertion part of the auger head 4.
3 Insert the tip end insertion opening. Further, as described above, when the cylinder device is provided in the bracket portion 30, the auger head support base 33 is raised, so that the auger head 4 is inserted into the leading end insertion opening of the screw rod 23. An insertion part can be inserted. After insertion,
The work of attaching the auger head 4 is completed by inserting a pin (not shown) into a pin insertion opening 4a formed in the insertion portion of the auger head 4 and tightening and fixing a screw (not shown) for retaining the pin. . Regarding the removal work, basically, the mounting work pin insertion port 4a,
23a and the screw rod 2
The above sequence may be reversed while the auger head 4 at the front end 3 is always supported by the head support 33b.

Therefore, according to the second embodiment of the present invention, a supporting worker is not required for positioning in the auger head replacement operation. Therefore, labor costs in the auger head replacement operation can be reduced. As described above, it is needless to say that the positioning becomes easier and the working time can be remarkably reduced as compared with the work performed by a plurality of workers. In addition, compared to the auger head exchanging device of the first embodiment of the present invention, the auger head exchanging device has a simple structure and has a small number of components, so that it can be manufactured at low cost. The embodiment of the present invention described above only exemplifies the pile press-in / pull-out machine 10 having the well-known earth auger 20 shown in FIGS. I am not doing it. Therefore, any excavator having an auger can use the auger head exchanging device of the present invention. In addition, although the head support portions 2c and 33b shown in the first and second examples of the embodiment of the present invention each mount an auger head, the present invention is not limited to this. For example, any type may be used as long as it can clamp or fit the auger head. Further, the head support portion 2c is
The left and right movable bases 2 and two left and right movable bases 6 indicated by phantom lines in FIG. 2 may be provided on the front and rear movable bases 1 and two for auger head removal / attachment. Alternatively, the two head support portions 33b may be connected to the arm 32 and used separately for taking out and mounting the auger head.

[0026]

As described above, according to the auger head exchanging apparatus according to the present invention, at the time of auger head exchanging, the head supporting portion which constantly supports the auger head and the head supporting portion are moved in the horizontal direction. Since the movable support means is provided, a supporting worker is not required for positioning in the auger head replacement operation. Therefore, labor costs in the auger head replacement operation can be reduced. Also, compared to work performed by multiple workers,
Positioning becomes easy, and the working time can be drastically reduced.

[Brief description of the drawings]

FIG. 1 is a plan view showing an auger head replacement device according to a first embodiment of the present invention.

FIG. 2 is a side view showing the auger head replacement device according to the first embodiment of the present invention.

FIG. 3 is a front view showing the auger head replacement device according to the first embodiment of the present invention.

FIG. 4 is a side view for explaining a replacement method of the auger head replacement device according to the first embodiment of the present invention.

FIG. 5 is a side view for explaining a replacement method of the auger head replacement device according to the second embodiment of the present invention.

FIG. 6 is a plan view showing an auger head replacement device according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front-back moving stand (moving support means) 2 Left-right moving stand (moving support means) 2c Head support part 4 Auger head 10 Pile press-in / pull-out machine 20 Earth auger 23 Screw rod 32 Arm (link part) 33 Auger head support 33a Extension Unit 33b head support unit 40 work stage (work table) 41 stage mounting unit

Claims (6)

[Claims] An auger head exchanging device for supporting an auger head when exchanging an auger head at an auger tip of an excavator, wherein the auger head exchanging device is disposed below the auger when the auger head is exchanged, and
An auger head exchanging apparatus, comprising: a head supporting portion for supporting the auger head at an auger head exchanging position; and a moving supporting means for making the head supporting portion movable. 2. The auger head exchanging device according to claim 1, wherein the excavating device is provided in a pile press-in machine for press-fitting a pile by taking a reaction force from an existing pile, and the moving support means includes a pile press-in machine. Alternatively, an auger head exchanging device characterized in that the auger head exchanging device can be attached to a work table provided in a pile press machine. 3. The auger head exchanging device according to claim 1, wherein the moving support means includes a link having a connecting portion rotatably connected to each other, and the head supporting portion is connected to the link. An auger head replacement device characterized in that: 4. The auger head exchanging apparatus according to claim 1, wherein said moving support means comprises a movable base which is slidable in a substantially horizontal direction. 5. The auger head exchanging device according to claim 1, wherein the head supporter rotatably supports the auger head. 6. The auger head exchanging device according to claim 1, further comprising: moving support means provided with a plurality of the head support portions, or a plurality of the auger head replacement devices each provided with a head support portion. A moving support means, a part of the plurality of head supports supports an auger head to be attached to the auger when the auger head is replaced, and a part of the remaining part of the plurality of head supports is An auger head exchanging device, wherein the head supporter supports an auger head detached from the auger when exchanging the auger head.