JPH07247574A - Multispindle auger - Google Patents

Abstract

PURPOSE:To provide a multispindle auger for use in construction by column row type underground wall construction method wherein location of center of gravity of a machine itself can be set at a low level and running stability and operability is improved. CONSTITUTION:In a multispindle auger wherein a guide leader 2 is vertically supported on a base machine 1 and an auger rotary drive device 5 is provided close to the front of the leader 2 so as to be lifted and lowered, a storing device 11 for storing additional rods is provided on the side surface of the leader 2 so as to be rotated and moved to the front side of the leader 2. Further, an automatic coupling device 30 is connected integral to the lower part of the device 5 to couple the upper ends of the rods 10 stored in the storing device 11 with the device 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-axis auger used for constructing a column-row underground wall construction method.

[0002]

2. Description of the Related Art The column-row type underground wall method is widely used as a means for constructing mountain retaining walls, root cutting walls, and the like. For example, a cement-based hardening agent is stirred and mixed with in-situ soil to form a pillar-shaped soil cement pile, and a reinforcing material such as a reinforcing bar cage is inserted into the constructed soil cement pile to build a continuous wall. Positioned soil agitation pile system is a columnar type underground wall construction method.

As is well known, a multi-axis auger is used as a construction machine in this column-row type underground wall construction method. Therefore, the multi-axis auger plays an extremely important role in the construction of the column-row type underground wall method. By the way, the conventional multi-axis auger having this important role is generally constructed as follows.

First, a crawler or wheel type self-propelled trolley is used as a base machine. A guide leader is vertically held by a swivel mounted on the carriage via a stay, and an auger rotation drive device is vertically moved along the held guide leader. Next, connect a plurality of auger screw shafts to the auger rotation drive unit along this guide leader, rotate the auger screw while lowering the auger rotation drive unit, and perform columnar drilling work on the ground. It is usually configured to do.

That is, in the conventional general multi-axis auger, a tall guide leader is supported by a base machine in a cantilever manner and vertically, and an auger rotation driving device is vertically movable along the auger. The screw shaft head is connected and equipped. As a result, the center of gravity of the machine itself is high, and there are problems in running stability and workability.

[0006]

However, the column-type underground wall construction method has become widespread, and more specifically, a multi-axis auger capable of deeper drilling than the conventional one, for example, a drilling depth of 60 meters or more. In addition, due to the popularization of the pillar-lined underground wall construction method in the urban areas where buildings and houses are set up, the development of a multi-axis auger that solves the above problems and has good workability and running stability is required. The following technical issues have been raised for the axial auger. (1) First, in order to meet the demand for a deeper drilling depth, it is necessary to lengthen the length of the guide leader and the auger. In other words, it is necessary to raise the guide reader and increase the length of the auger. However,
In the conventional multi-axis auger configuration, as described above, if the guide leader is raised and the length of the auger is increased, the center of gravity of the machine itself becomes higher. As a result, there is a problem that the running stability and workability described above are further deteriorated. (2) The second point is that instead of increasing the height of the guide leader, a rod is added to the auger itself, more specifically, the auger screw itself, and this addition allows deeper drilling depth. There is a counter proposal. However, in the present multi-axis auger as well, it is necessary to hang up the rods using a phase crane to replenish the rods and to replenish them at a high place. Therefore, there is a problem that the work of suspending the rod by the crane and the connection are combined, which is dangerous and conversely reduces the work efficiency. (3) The third point is construction in urban areas. That is, in the case of construction in a residential area where a building or a house is set up, the safety of work is particularly required including the above-mentioned running stability and workability. In other words, it is necessary to give full consideration to safety, such as prevention of falls, measures against strong winds, and elimination of anxiety about neighboring residents. How to deal with this.

The present invention has been made for the purpose of contributing to the widespread use of the column-row type underground wall construction method by developing a multi-axis auger that solves such a technical problem, that is, a problem.

[0008]

As means for achieving the above object, the first point of the present invention is that the machine height as a multi-axis auger can be set low, and the second point is the phase number. The structure is such that rods can be added without relying on a crane, thereby making it possible to enhance the depth of drilling, the safety of drilling work, and the workability.

Therefore, first of all, as a basic configuration,
A guide device is supported vertically on the base machine, and in the front of the guide leader, a storage device for accommodating a rod for replenishment is provided on the side surface of the guide leader in a multi-axis auger in which an auger rotation drive device is vertically movable. It is configured to be mounted on the front side of the guide reader so that it can swivel freely. Further, an automatic coupling device for connecting the upper end portion of the rod housed in the storage device to the auger rotation driving device is integrally attached to the lower part of the auger rotation driving device.

Further, in the rod storage device, an upper horizontal gripping metal fitting for vertically gripping a plurality of rods near the upper end portions thereof in parallel with each other at a constant interval, and a lower horizontal gripping member for vertically supporting each lower end portion of the rods. It was constructed with a support bracket. That is, a plurality of rods can be stored vertically and in parallel by using the upper horizontal grip fitting and the lower horizontal support fitting.

Then, the storage device was mounted on the guide reader as follows. First, rotary shafts were attached to the upper and lower positions of the side surface of the guide reader. Then, connecting arms that horizontally extend are attached to this rotating shaft, and the end portions of the upper horizontal holding metal fittings and the lower horizontal supporting metal fittings that constitute the storage device are respectively attached to the tip ends of the upper and lower connecting arms via the rotating shafts. Connected. Further, a torque actuator is incorporated in each of the rotating shafts. As a result, when the torque actuator is operated, the upper and lower connecting arms and the storage device composed of the upper horizontal holding metal fittings and the lower horizontal supporting metal fittings are automatically moved from the side surface of the guide leader to the front side with the rotary shafts as fulcrums. It is equipped with a structure that allows it to rotate.

Further, a telescopic type rod which can be expanded and contracted is used as the rod, and the rod is extended to be used to cope with the drilling depth.

[0013]

Since the present invention is configured as described above, when a predetermined rod is stored in the storage device mounted on the side surface of the guide leader in advance and the predetermined drilling work by the auger screw is completed. Then, separate the auger rotation drive device, and the separated auger rotation drive device is
Pull up once along the guide leader. When it is pulled up, the storage device is swung from the side surface of the guide reader to the front side. That is, the torque actuator incorporated in the rotating shaft of the connecting arm that supports the storage device is actuated to pivotally move to the front side. In other words, the storage device is moved to the front side of the guide reader, and is moved directly below the auger rotation drive device that is pulled up.

At the time when the storage device is moved to the front side of the guide reader, the auger rotation drive device pulled up is lowered. When the auger rotary drive is lowered,
Since the automatic coupling device mounted on the lower portion corresponds to the upper end portion of the rod accommodated in the storage device, both of them are aligned in that state, and the auger rotation drive device is further lowered. The rod is then coupled to the auger rotary drive via an automatic coupling device.

When the connection of the rod to the auger rotary drive is completed, the auger rotary drive is pulled up. Then, the rod housed in the storage device is separated from the storage device and pulled up. Therefore, this time, the storage device is pivotally moved from the front surface of the guide reader to the side surface side. That is, the storage device is returned to the original position. The stored rod is released from the storage device and connected to the auger rotation drive device side.

When the connection of the rod to the auger rotation drive device is completed, the auger rotation drive device is lowered along the guide leader. Then, the lower end of the rod corresponds to the upper end of the shaft of the auger screw screwed into the ground by the drilling operation. Therefore, the auger rotation drive device is further lowered to connect the lower end of the rod to the upper end of the auger screw. As a result, the rod is added to the auger screw and directly connected to the auger rotation drive device.

Therefore, if the auger rotation driving device is operated while the auger rotation driving device is lowered, drilling work of a desired depth can be performed. Further, since the rod is of a telescopic type, when the boring for the unit length of the rod is completed, the auger rotation drive device is once pulled up to extend the rod itself. After stretching, if the auger rotation drive device is lowered again, drilling work with a depth corresponding to the stretched amount becomes possible.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the multi-axis auger according to the present invention will be specifically described with reference to the embodiments shown in the drawings. First, Fig. 1
FIG. 3 is a side view showing the overall structure of a multi-axis auger according to the present invention. The base machine 1 is configured by a crawler type self-propelled vehicle equipped with a swivel base 1a as illustrated. The lower end of the guide leader 2 is connected to a leader bracket 3 that extends forward (to the left in the figure) from the swivel base 1a, and the upper end is connected to the rear end of the swivel base 1a with a stay 4. The guide reader 2 is held vertically with respect to the swivel base 1a. The auger rotation drive device 5 that can be moved up and down along the guide leader 2 is mounted on the front surface of the guide leader 2, that is, on the left side in FIG. In the embodiment, three auger screws 6 are attached to the auger rotation driving device 5 to form a so-called triaxial multi-axis auger. Reference numeral 7 denotes a steady rest of the lower end portion of the auger screw 6, which is attached to the front surface of the leader bracket 3. FIG. 2 is a front view of FIG.

The present invention has the above-mentioned structure 3.
In the shaft type multi-axis auger, a storage device 11 for accommodating three rods 10 is provided on the side surface of the guide leader 2, that is, on the right side of the guide leader 2 as shown in FIGS. 1 and 2. Further, an automatic coupling device 30 for connecting the upper end portion 10a of the rod 10 is attached to the lower portion of the auger rotation driving device 5 and is equipped.

FIG. 3 is a front view showing the configuration of the storage device 11 mounted on the side surface of the guide reader 2. Storage device 1
1 is the upper end portion 10a of the rod 10 as described above.
The upper horizontal holding metal fitting 12 for holding the vicinity in a parallel state at a constant interval, and the lower horizontal support metal fitting 13 for vertically supporting the lower end portion 10b of the rod 10 are also configured.
In the embodiment, since it is a triaxial type, three rods 10 are used.
Is configured to be stored, and the arrangement interval of each rod 10 is
The intervals between the shafts of the three auger screws 6 were matched in advance.

As a means for mounting the storage device 11 composed of the upper horizontal grip metal fitting 12 and the lower horizontal support metal fitting 13 so as to be pivotally movable to the front side of the guide reader 2, as shown in FIG. The rotary shaft 20 was attached along the side surface of the guide reader 2. And this rotating shaft 2
0 at the upper end and at the same lower end at the connecting arms 2 respectively.
1 and the connecting arm 22 were attached so as to be horizontally extended so as to be rotatable about the rotary shaft 20.

Next, the upper horizontal grip fitting 12 and the lower horizontal support constituting the storage device 11 are formed on the distal ends of the connecting arms 21 and 22 attached to the upper end and the lower end of the rotary shaft 20, respectively, on the right side in FIG. The metal fitting 13,
Each of them was attached via a common rotary shaft 23. That is, the storage device 11 is provided with the two rotary shafts 20 and 23,
Further, a kind of link mechanism composed of upper and lower connecting arms 21 and 22 is mounted on the side surface of the guide reader 2, and the storage device 11 is mounted and mounted so as to be pivotable from the side surface of the guide reader 2 to the front side.

Further, the detailed structure of the upper ends of the two rotary shafts 20 and 23 is not shown in the drawing, but the torque actuator 2 is composed of a small hydraulic motor.
0a and 23a are incorporated and the torque actuators 20a and 23a are individually actuated, the connecting arms 21 and 22, and the upper horizontal grip fitting 12 and the lower horizontal grip fitting 13 constituting the storage device 11 are respectively rotated. And 23 are used as fulcrums.

Incidentally, FIG. 4 shows the torque actuator 2
0a and 23a are actuated, the upper horizontal grip fitting 12 in the storage device 11 is swung about the rotary shafts 20 and 23 as a fulcrum, and is moved from the side surface of the guide reader 2 to the front side. The line indicates the moving position. FIG. 5 is a plan view showing a state in which the lower horizontal support fitting 13 is pivotally moved. The upper horizontal grip 1
2 and the lower horizontal support fitting 13 are pivotally supported by the common rotating shafts 20 and 23, respectively, and therefore they follow in parallel.

Further, since the upper horizontal holding metal fitting 12 which constitutes the storage device 11 holds the three rods 10 in parallel at a predetermined interval, the upper horizontal holding metal fitting 12 is attached to the upper horizontal holding metal fitting 12 as shown in FIG. The four legs 12a are extended in the horizontal direction, and the whole is configured as a so-called fork type. Then, the foot 12a of the upper horizontal grip fitting 12 is connected to the connecting fitting 1 for connecting the three rods 10 as shown in FIG.
It is configured to be inserted and grasped under 4. The reason is that the rod 10 is mounted on the upper horizontal grip fitting 12 in the storage device 11.
This is because the rod 10 held by the upper horizontal grip fitting 12 can be easily detached when releasing the rod 10 from the above. Specifically, as shown in FIG. 4, the upper horizontal holding metal fitting 12 may be turned in the direction of the arrow with the rotary shaft 23 as a fulcrum. Further, since the lower horizontal support fitting 13 simply mounts and supports the lower end portion 10b of the rod 10, as shown in the plan view of FIG. 5, a shallow groove 13a corresponding to the lower end portion 10b of the rod 10 is provided. , It was configured to be placed and supported in this.

Next, when the three rods 10 held in the storage device 11 are pivotally moved to the front position of the guide reader 2, the upper end portions 10a of the respective rods 10 are connected to the auger rotation drive device 5. Automatic coupling device 30 for
Was configured as shown in FIG. Auger rotary drive 5
Needless to say, the upper and lower ends of the shafts 6a of the three augers, specifically, the three auger screws 6, are provided so as to be vertically movable along the guide leader 2 shown in FIGS. 1 and 2. The parts are connected and the rotational force is transmitted to each auger screw 6. Therefore, as shown in FIG. 6, the automatic coupling device 30 is directly attached to the lower part of the auger rotation driving device 5 so as to be integrally assembled and equipped.

As shown in FIG. 6, a concrete structure of the automatic coupling device 30 is provided with a guide tube 31 for inserting a rod, which is in the shape of a trumpet tube, in the lower part, and inside the guide tube 31, the upper end of the rod 10 is provided. Although not shown in the drawing, when the portion 10a is inserted, a hydraulically operated chuck incorporated inside the guide tube 31 is actuated to fasten and fix the upper end portion 10a of the guide tube 31 to drive the auger rotation. It is constructed so that it can be automatically connected directly to the device 5. Therefore, when the auger rotation drive device 5 is operated after the direct connection, each rod 10 is rotationally driven. Reference numeral 32 shown in FIG. 6 is a hydraulic motor built in the auger rotation drive device 5 for giving a rotational force to the auger screw 6 or the rod 10, respectively, and specifically, an appropriate torque is supplied via a speed reducer. Each auger screw 6 is configured to be able to be transmitted to the rod 10.

Next, the procedure of the drilling work by the multi-axis auger will be briefly described with reference to the drawings. First, in (a) shown in FIG. 7, three auger screws 6 are connected via an automatic coupling device 30 provided in the auger rotation driving device 5, and three auger screws 6 are provided in the storage device 11 on the side surface of the guide reader 2. The so-called standby state in which the rod 10 for replenishment is stored and the preparation for the drilling work is completed is shown. Similarly, (B) shows a state in which the auger rotation driving device 5 is lowered and the drilling work by the auger screw 6 is completed. Next, in (c), the auger screw 6 is moved to the auger rotation drive device 5.
The state where the auger rotation drive device 5 and the automatic coupling device 30 are separated from the automatic coupling device 30 of FIG. (D) shows a state in which the storage device 11 on the side surface of the guide reader 2 is pivotally moved to the front side of the guide reader 2 in the above state. The turning movement is performed by the storage device 11 as described above with reference to FIG.
The torque actuators 20a and 23a incorporated in the two rotary shafts 20 and 23 that support the motor are operated.

FIG. 8E shows the automatic coupling device 30 of the auger rotation driving device 5 with the upper end portion 10a of the rod 10 housed in the storage device 11 moved to the front side of the guide reader 2.
Shows the state of being combined with. The upper end 10 of the rod 10
When connecting a to the automatic coupling device 30, the auger rotary drive device 5 is lowered and guided to the guide tube 31 for inserting a rod-shaped rod-shaped rod provided at the bottom of the automatic coupling device 30 shown in FIG. Let Then (f) is rod 1
After the upper end portion 10a of 0 is connected to the auger rotation drive device 5 side, the storage device 1 that has housed the rod 10 until then
In order to return 1 to the original position, the auger rotation drive device 5 is temporarily pulled up slightly, and in that state the storage device 11 is returned to the side surface of the guide reader 2. (G) returns the storage device 11 to the side surface of the guide reader 2 and then lowers the auger rotation drive device 5 so that the lower end portion 10b of the rod 10 connected to the auger rotation drive device 5 side is in the ground. It shows a state in which the shaft 6a of the auger screw 6 in a twisted state is connected to the upper end portion of the shaft 6a.

Next, in FIG. 9C, the connection of the rod 10 to the auger screw 6 is completed, and the auger rotation drive device 5 is further lowered to make a hole having a depth corresponding to the stroke of the rod 10. Shows the state. Furthermore, (ri)
The state in which the auger rotation drive device 5 is pulled upward from the state (H) and the telescope type rod 10 is fully extended is shown. Next, (nu) shows a state in which the auger rotation driving device 5 is lowered again from the state where the rod 10 is fully extended, and the drilling work of the depth corresponding to the fully extended amount is completed.

[0031]

Since the multi-axis auger according to the present invention is constructed as described above with reference to the embodiments, the following operational effects are exhibited as compared with the conventional multi-axis auger. (1) Since the extension rod is stored on the side surface of the guide leader, it is not necessary to suspend the extension rod using a phase number crane as in the conventional case. Therefore, in the urban area, the complicated machinery is avoided. (2) Since the storage device is configured to swivel from the side surface of the guide leader to the front surface side by the operation of the torque actuator incorporated in the rotary shaft, the rod can be extremely easily positioned, that is, the auger rotation drive device. It can be moved to the lower part, that is, directly below the automatic coupling device. As a result, rod replenishment is performed simply by lowering the auger rotary drive. As a result, there is no need for a phase number crane, work in high places is eliminated, and it is extremely safe and efficient. (3) The storage device is mounted on the side surface of the guide leader by a kind of link mechanism consisting of two rotating shafts and upper and lower connecting arms, so that the drilling position is surrounded by the surrounding structure, for example. Even in a large place, the operation of the link mechanism allows the rod to be moved without hindrance.
Incidentally, the connecting arm, which is a mounting member of the storage device with respect to the guide reader, has a variable angle of 180 °, and accordingly, the storage device can be displaced by a wide angle accordingly. Therefore, it is possible to perform the drilling work on site without any problem, which is easily affected by locational restrictions in urban areas. (4) It is not necessary to suspend and connect the rod for replenishment with a phase number crane, and since the rod is a telescope type, the height of the guide leader can be set relatively low. As a result, the height of the machine itself can be set low, and the position of the center of gravity also becomes low, so that a fall accident or the influence of wind can be suppressed.

From the above effects, it is possible to function as a low center of gravity type multi-axis auger as a whole, and instead of the conventional multi-axis auger which is considered to have problems in workability and safety, earth retaining in urban areas and the like. It can greatly contribute to the popularization of the columnar type underground wall construction method for walls and the like.

[Brief description of drawings]

FIG. 1 is a side view of a multi-axis auger according to the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a front view showing a mounting structure of a storage device for a replenishment rod with respect to a guide leader.

FIG. 4 is a plan view showing a shape structure of an upper horizontal grip fitting that constitutes the storage device and a pivoting operation procedure around the guide leader.

FIG. 5 is a plan view showing a shape structure of a lower horizontal support fitting and a pivoting operation procedure around the guide leader.

FIG. 6 is a front view showing the outline of the assembly structure of the automatic coupling device with respect to the auger rotation drive device.

[Fig. 7] (a), (b), (c), and (d) connect the auger screw to the auger rotation drive device, and after the drilling work by the auger screw, the rod is accommodated to add the rod. It is a side view which shows the process until it turns the stored storage device to the front side of the guide reader.

8 (e), (f), and (g) are side views showing the steps up to adding the rod to the auger screw and returning the storage device to the original position.

FIG. 9 is a side view showing a step of further drilling work using a replenishing rod.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base machine 2 ... Guide leader 3 ... Leader bracket 4 ... Stay 5 ... Auger rotation drive device 6 ... Auger screw 7 ... Steady stop 10 ... Rod 11 ... Storage device 12 ... Upper horizontal grip metal fitting 13 ... Lower horizontal support metal fitting 14 ... Connection fittings 20, 23 ... Rotating shafts 20a, 23a ... Torque actuators 21, 22 ... Connection arm 30 ... Automatic coupling device 31 ... Guide tube 32 ... Hydraulic motor

Front page continuation (72) Inventor Yuichi Shirakawa 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. (72) Masayuki Okochi 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. In-house (72) Inventor Konno Konoe 1-25-1 Nishishinjuku 1-chome, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. (72) Inventor Isokichi Yajima 1-1-14 Ginza, Chuo-ku, Tokyo Seiwa Koki Co., Ltd. Incorporated (72) Inventor Akio Seya 1-14-5 Ginza, Chuo-ku, Tokyo Seiwa Kiko Co., Ltd. (72) Inventor Hideo Iida 1-14-5 Ginza, Chuo-ku, Tokyo Seiwa Koki Incorporated (72) Inventor Mamoru Hamano 1293 Amado-cho, Hanamigawa-ku, Chiba, Chiba Sanwa Machinery Co., Ltd.Chiba factory (72) Inventor Etsuo Hirakawa 1293 Amado-cho, Hanamigawa-ku, Chiba, Chiba Sanwa Machinery Co., Ltd. Chiba Factory (72) Inventor Isamu Yamanoi 1293 Amado-cho, Hanamigawa-ku, Chiba City, Chiba Sanwa Machinery Co., Ltd.Chiba Factory (72) Who Shitomi Yasuji, Chiyoda-ku, Tokyo Iwamotocho 2 Nariyuki Industrial Stock Company East Production Division in

Claims (3)

[Claims] 1. A multi-axis auger in which a guide leader is vertically supported on a base machine, and an auger rotation driving device is vertically movable along a front surface of the guide leader, and a multi-axis auger is provided on a side surface of the guide leader. A storage device accommodating the rod of the storage device is rotatably mounted to the front side of the guide reader, and the upper end of the rod accommodated in the storage device is connected to the auger rotation drive device at the lower part of the auger rotation drive device. A multi-axis auger that is equipped with an automatic coupling device that is integrally assembled. 2. The storage device has a plurality of rods in which the upper end portions of the rods are arranged in parallel at regular intervals in parallel, and an upper horizontal holding metal fitting for vertically holding the rod, and a lower horizontal support for vertically supporting the lower end portion of the rods. With metal fittings,
On the other hand, rotating shafts are attached to the upper and lower sides of the guide leader, and connecting arms that horizontally project to the rotating shafts are attached, and the upper horizontal holding metal fittings and the lower horizontal supporting metal fittings of the storage device are attached to the tips of the upper and lower connecting arms. End portions of the above are respectively connected via a rotating shaft, and a torque actuator is incorporated in the rotating shaft. With this torque actuator, a storage device including the upper and lower connecting arms and an upper horizontal holding metal fitting and a lower horizontal supporting metal fitting is installed. 2. The multi-axis auger according to claim 1, wherein the multi-axis auger is provided so as to be pivotally movable toward the front side of the guide reader with the rotary shaft as a fulcrum. 3. The multi-axis auger according to claim 1, wherein the rod is a telescope type rod.