JP4719618B2 - Small turning pile driver - Google Patents

Description

  The present invention relates to a pile driving machine in which a lower traveling body that can travel by a crawler is provided with an upper revolving body provided with a leader and the like, and in particular, while reducing the turning radius of the upper revolving body, stability during operation is improved. It relates to the small turning pile driver.

With regard to conventional civil engineering work, for example, a pile driver equipped with a leader for raising and lowering a working device is used for improving soft ground. 7 and 8 are views showing a conventional pile driver equipped with an auger, in which FIG. 7 is a side view, and FIG. 8 is a plan view in a state where it is turned by a predetermined angle.
In this pile driving machine 100, an upper revolving body 102 having a cockpit or the like is provided on a lower traveling body 101 that can be traveled by a crawler 111 so as to be able to turn. A leader 103 is pivotally supported at the head of the upper swing body 102 so as to be pivotable in the front-rear direction, and the leader 103 stands up in a three-point supported state by two backstays 104 connected rearwardly. Yes. A working device such as an auger is attached to the reader 103 according to construction.

When the pile driving machine 100 turns, the width and length of the crawler 111 are determined so that the same stability and the allowable ground pressure or less are obtained at any position. In such a crawler type pile driving machine 100, as shown in FIG. 8, the pile core position of the leader 103 is determined so that the pile driving and the continuous wall construction can be performed within the entire turning range by avoiding the crawler 111. . Accordingly, the position P of the large auger attached to the reader 103 is far from the turning center O of the upper turning body 102. Therefore, in order to maintain the stability of the entire pile driver, a necessary amount of counterweight 105 is provided at the rear, and a front jack 106 is provided at the front. The counterweight 105 is used to balance the front and back, and the front jack 106 receives the reaction force received from the work piles and enables stable construction.
Japanese Patent Laid-Open No. 11-158927 (second page, FIG. 1 and FIG. 2)

  The size of the pile driver is determined by the machine weight of a working device such as an auger attached to a front device necessary for construction, that is, a leader. Therefore, the selection of the pile driver will be large in accordance with the construction using a large working device. The pile driving machine 100 shown in FIGS. 7 and 8 is for mounting a large auger, and a large working space is required for construction performed using the pile driving machine because the turning radius is large. However, even when a large work device is required depending on the construction content, the work space is not necessarily wide according to it, for example, in the continuous wall construction for subways performed in urban areas, the limited space on the side of the road You have to work on.

  The work in such places has a great impact on traffic, and it is difficult to secure land because the residential areas are adjacent. Therefore, there has been a demand for a pile driving machine that cannot be used in a wide space, but that can be used at a construction site where a large working device needs to be used. Moreover, the construction performed in urban areas often has a narrow road width to the site, and if the pile driver is large, it is difficult to enter the site itself. Accordingly, there has been a high demand for making the pile driver main body disassembleable, reducing the disassembly weight lightly, and facilitating assembly and disassembly to improve transportability.

  Accordingly, an object of the present invention is to provide a small turning pile driving machine having a reduced turning radius and improved stability during work in order to solve such a problem.

  The small turning pile driving machine of the present invention has an upper turning body mounted on a lower traveling body so as to be turnable, and a leader is erected on the upper turning body so as to move up and down along the leader. The upper revolving unit is equipped with a power unit that is turned sideways in the center, a counterweight is mounted on the rear, and a front jack is held on the side. A telescopic arm that can be expanded and contracted is attached, and when the telescopic arm is extended, the front jack is positioned in front of the main frame beyond the position of the working device.

Further, in the small turning pile driver of the present invention, it is preferable that the telescopic arms provided on the left and right sides of the main frame are attached so as to be inclined so as to widen the space in the front direction of the main frame. .
Further, in the small turning pile driving machine of the present invention, when the telescopic arm contracts, the front jack is located on the main frame side with respect to the position of the working device attached to the leader, and It is preferable that the width is within the width.
Further, in the small turning pile driver of the present invention, it is preferable that the telescopic arm is configured such that an arm member combined so as to be extendable and contractable by a hydraulic cylinder extends and contracts.

  Therefore, according to the small turning pile driver of the present invention, the power unit is mounted horizontally in the center of the main frame, and further the counterweight is mounted on the rear side thereof. It is possible to reduce the turning radius on the rear side. In order to reduce the turning radius, the counterweight cannot be placed by protruding backwards.However, the front jack of the telescopic arm is more forward than the working device because of the force applied to the front of the main frame, such as the pulling reaction force of the excavating rod that acts during work. Because it supports it, it is possible to work with stability.

  Next, an embodiment of a small turning pile driver according to the present invention will be described below with reference to the drawings. FIG. 1 thru | or FIG. 3 is the figure which showed the working state of the small turning pile driver of this embodiment. The small turning pile driver 1 in the drawing shows a state in which the upper turning body 3 provided with the leader is turned sideways with respect to the lower turning body 2. 1 is a view showing the side of the upper swing body, FIG. 2 is a view showing the front side of the upper swing body, and FIG. 3 is a plan view.

  In the small turning pile driving machine 1, an upper turning body 3 is integrally formed with a lower traveling body 2 provided with a crawler 20 via a turning mechanism. A leader 5 is fixed to the upper swing body 3 and stands up, and an auger 50 as a working device is mounted on the upper swing body 3 so as to be movable up and down. The leader 5 has a three-point support structure in which two backstays 6 are connected from the rear. The upper swing body 3 is mounted with a power unit 7 and a counterweight 8 in addition to the reader 5. The power unit 7 serves as a power source for driving the crawler 20, the auger 50, and the like, and the counterweight 8 is provided to balance the front reader 5 and the auger 50.

  Here, FIG. 4 is a side view showing the small turning pile driver with the leader 5, the power unit 7, the counterweight 8 and the like removed from the upper turning body 3, and FIG. 5 is a plan view thereof. The upper swing body 3 includes a main frame 30 on which the reader 5, the power unit 7, and the counterweight 8 can be mounted. The main frame 30 is provided with a reader support base 31 that constitutes a lower end portion of the reader 5 in front of the main frame 30. The leader support base 31 is a cylindrical body formed in the same size as the leader 5, and a pair of guide pipes 32 are provided on both front sides, and a flange for fastening the leader 5 with a bolt at the upper end. 33 is formed.

  Further, the main frame 30 of the upper swing body 3 includes a unit base 35 for mounting the power unit 7 at the center portion and a weight base 36 for mounting the counterweight 8 behind the unit base 35. As shown in FIG. 1, the weight table 36 is formed lower than the unit table 35 and has a level difference in order to mount the counterweight 8 vertically. And in this main frame 30, in order to shorten the dimension of the front-back direction, as shown in FIG.2 and FIG.3, the power unit 7 is arrange | positioned sideways with respect to the unit base 35. FIG. Further, as shown in FIG. 1, the counterweight 8 mounted on the rear weight table 36 is integrally formed by overlapping weight blocks 8a and 8b in two upper and lower stages.

  In FIG. 3, the turning radii of the power unit 7 and the counterweight 8 are indicated by two-dot chain arcs A and B. As can be seen from this figure, the counterweight 8 has a multifaceted side surface so as to be accommodated inside the arc B. In the power unit 7, the arc A that is the locus of the corner is outside the arc B that is the locus of the side surface of the counterweight 8, and the turning radius is large. Therefore, in the small turning pile driver 1 of the present embodiment, the turning radius on the rear side of the machine body is reduced as a whole pile driver by arranging the power unit 7 that protrudes sideways and the turning radius becomes large at the turning center. It is configured as follows.

The upper swing body 3 is provided with a front jack 11 on the left and right front sides of the reader 5. The front jack 11 can be arbitrarily positioned between the retracted position indicated by the wavy line and the action position indicated by the solid line in FIG.
The telescopic arms 12 are provided symmetrically on the left and right sides of the upper swing body 3, and are fixed to the side of the upper swing body 3 away from the main frame 30 via brackets 21 and the like. The telescopic arm 12 is configured such that a slider 23 is inserted into a slide case 22 and expands and contracts by a hydraulic cylinder 24.

  The hydraulic cylinder 24 is provided in the slide case 22 and the slider 23 that are fitted together, and is connected to each of them. A front jack 11 made of a hydraulic cylinder is fixed vertically at the tip of the slider 23. Accordingly, the expansion and contraction of the hydraulic cylinder 24 causes the slider 23 to enter and exit from the slide case 22 to adjust the extension of the telescopic arm 12, and the position of the solid front jack 11 is adjusted.

  As shown in FIG. 5, the telescopic arm 12 is attached in a U shape so that the slide case 22 becomes wider toward the front side of the main frame 30, and the distance between the left and right front jacks 11 extends as shown by the solid line. It is configured to be larger in the state. However, in the contracted state as indicated by the wavy line, the left and right front jacks 11 do not protrude from the vehicle width of the lower turning body 2 including the left and right crawlers 20 as indicated by the two-dot chain line.

  Next, the two backstays 6 that support the reader 5 are attached at the lower ends thereof on the counterweight 8 mounted on the main frame 30. In this embodiment, the turning radius is reduced by reducing the size in the front-rear direction. Similarly, winches 9 and 10 are respectively provided on the upper portion of the counterweight 8 and the back portion of the reader 5 in order to suppress the size in the front-rear direction.

  When excavation or the like is performed by such a small turning pile driving machine 1, an auger 50 as a working device is attached to the leader 5. Therefore, the guide pipe 13 is formed in the leader 5 in the longitudinal direction, and the auger 50 is mounted via a guide give 51 that is slidably fitted to the guide pipe 13. The auger 50 is suspended from a wire rope fed from the winch 9 via a sheave 15 at the upper end of the leader 5 and is attached so as to move up and down by the unwinding and winding operation of the winch 9.

  The auger 50 attached to the small turning pile driver 1 is a multi-axis rotation drive device that performs excavation work by connecting three stirring rods 60 arranged in the lateral direction. The agitation rod 60 connected to the auger 50 is provided with a plurality of agitation blades 61, and the agitation blades 61 of the agitation rod 60 are arranged so as to be displaced from each other. Further, the agitating rod 60 is integrally connected with an excavating blade having a excavating blade below and a excavating bit at the tip, and the central excavating rod 63 is formed to be short so as not to interfere with the agitating vanes on both sides. ing.

  Then, the construction method by the small turning pile driver 1 equipped with the auger 50 is demonstrated. The work using the small turning pile driver 1 is effective for construction of a continuous wall for a subway with a narrow construction space, for example. Even if the construction site is in an urban area and the road width as a transportation route is narrow, the small turning pile driver 1 can be connected to the main frame 30 of the upper turning body 3 as shown in FIG. 7 and the counterweight 8 can be removed, and can be divided and transported in a compact state. The front jack 11 and the telescopic arm 12 are provided so as to protrude from the side of the main frame 30, but can be transported while being attached because they are within the width of the lower revolving unit 2.

  At the construction site, the divided and transported leader 5 and the like are assembled, and a small turning pile driving machine 1 as shown in FIGS. 1 to 3 is obtained. On the main frame 30 of the upper swing body 3, the power unit 7 is mounted on the unit table 35, and the counterweight 8 in which the weight blocks 8 a and 8 b are stacked in two upper and lower stages is mounted on the weight table 36. Further, the reader 5 is coaxially stacked on the reader support base 31, and the flanges 33 are fastened with bolts. At this time, the guide pipes 13 and 32 are continuous, and the auger 50 having the guide gibs 51 fitted thereto is mounted along the leader 5 so as to be movable up and down. The reader 5 is supported from the back by a back stay 6 connected to the counterweight 8, and the inclination of the reader 5 in the front-rear and left-right directions is finely adjusted by the expansion and contraction thereof. An auger 50 is attached to the reader 5 so as to be movable up and down, and a stirring rod 60 and the like are connected to the auger 50.

  When the small turning pile driver 1 is assembled, construction of a continuous wall for a subway is performed. The construction site is a narrow place such as a roadside, and a continuous wall is created along the road. As shown in FIGS. 1 to 3, the small turning pile driving machine 1 has the upper turning body 3 oriented in a direction orthogonal to the traveling direction of the lower turning body 2 by the crawler 20. Accordingly, the auger 50 and the stirring rod 60 attached to the leader 5 are arranged beside one of the crawlers 20 as shown in FIG. 3, and the three stirring rods 60 are in the traveling direction of the small turning work machine 1 (FIG. 3). (Upper side). Then, after performing the construction work of the continuous wall of the location in the predetermined position, the small turning pile driving machine 1 is moved by the crawler 20 while the upper turning body 3 is moved sideways, and the same is performed in the next position after the transfer. The construction work of the continuous wall is performed.

  In the small turning pile driving machine 1 at the time of work, as shown in FIG. 6, the telescopic arm 12 extends and projects forward from the stirring rod 60. And if the small turning pile driver 1 moves to a predetermined work position, as shown in FIG. 6, the front jack 11 will extend, and it will earth | ground in the position beyond the excavation position by the stirring rod 60. FIG. The telescopic arm 12 is fixed to a side surface portion of the main frame 30 via a bracket 21 and is angled so as to spread further forward. Therefore, the left and right front jacks 11 are grounded at a position where the interval is larger than the lateral width of the main frame 30 when the telescopic arm 12 is extended.

  For example, the continuous wall is formed as follows. When the auger 50 is driven, rotation is given to the three stirring rods 60, and when the winch 9 is unwound, the wire rope extends and the auger 50 and the excavating rod 60 are lowered. Therefore, the ground is excavated by the excavation bit or excavation blade at the tip, and the ground cut by the stirring blade 61 of the stirring rod 60 is stirred. In this way, a solidifying material such as cement milk is supplied while excavating the trench in the ground, and the excavated soil and the solidified material are agitated and mixed to form a soil cement.

  When the driven stirring rod 60 is pulled out, the auger 50 and the excavating rod 60 are pulled up through the wire rope by winding the winch 9. At this time, reverse rotation of the excavation rod 60 is given, but when the resistance with the ground is large, a pulling reaction force is received, and the small turning pile driver 1 is pulled downward by the stirring rod 60 and tilted forward. It takes power. Although the counterweight 8 is provided, there is a case where sufficient balance cannot be obtained because the counterweight 8 cannot be projected rearward. Therefore, in the small turning pile driver 1 of this embodiment, the front jack 11 supports and supports the pulling reaction force at a position in front of the stirring rod 60. Then, when a part of the continuous wall is formed, the small turning pile driver 1 moves to shift the place, and the same operation is repeated there. Therefore, a continuous wall is created in the ground with cylinders overlapping.

Therefore, according to the small turning pile driving machine 1 of the present embodiment, the arrangement of the counterweight 8 is limited to reduce the turning radius, and the front jack 11 is attached to the auger 50 or the like even when the balance during work is not sufficient. Since the work device is supported in the forward direction, a stable working state can be maintained.
Since the telescopic arm 12 is attached so as to widen forward, the space between the left and right front jacks 11 can be increased in the extended state, and the stability of the small turning pile driver 1 is further improved. can do.

In addition, when the telescopic arm 12 is contracted, the front jack 11 is accommodated within the width of the lower traveling body 2, so that it can be kept within the transport truck mounting limit even when attached to the main frame 30. When the telescopic arm 12 is in the contracted state, it is positioned closer to the main frame 30 than the auger 50 attached to the reader 5, so that stability is not impaired during turning.
Furthermore, since the telescopic arm 12 performs the telescopic operation by the hydraulic cylinder 24, the front jack 11 can be used at an arbitrary position between the retracted position indicated by the wavy line and the operating position indicated by the solid line in FIG.

Further, since the power unit 7 is mounted horizontally, the counterweight 8 is mounted vertically, and the backstay 6 is mounted on the counterweight 8, the size in the front-rear direction can be reduced. In addition, as shown in FIG. 3, by placing the power unit 7 whose trajectory at the time of turning is outside in the center of the body, the turning range on the rear side of the body can be reduced. Therefore, when working in the horizontal direction, as shown in FIGS. 1 and 3, the work can be performed in the vicinity of the side portion of the crawler 20, and the upper swing body 3 hardly protrudes from the crawler 20 on the opposite side. Therefore, the work can be performed sufficiently even in a narrow construction place in an urban area, for example, a place where there is only a space equivalent to a sidewalk.
Further, the small turning pile driving machine 1 is configured so that the reader 5, the power unit 7, the counterweight 8, and the like can be easily assembled and removed from the main frame 30 of the upper turning body 3. Therefore, as shown in FIG. 4, it is possible to remove the power unit 7 and the like from the main frame 30 and divide and transport them in a compact state.

  As mentioned above, although one Embodiment of the small turning pile driver concerning this invention was described, this invention is not limited to this, A various change is possible in the range which does not deviate from the meaning.

It is the figure which showed the working state of the small turning pile driver of one Embodiment, and is the side view of the state in which the upper turning body provided with the leader turned sideways with respect to the lower turning body. It is the figure which showed the working state of the small turning pile driver of one Embodiment, and is the front view of the state which the upper turning body provided with the leader turned sideways with respect to the lower turning body. It is the figure which showed the working state of the small turning pile driver of one Embodiment, and is a top view of the state which the upper turning body provided with the leader turned sideways with respect to the lower turning body. It is the side view which showed the pile driver of the state which removed the leader, the power unit, the counterweight, etc. from the upper turning body. It is the top view which showed the pile driver of the state which removed the leader, the power unit, the counterweight, etc. from the upper turning body. It is the figure which showed the working state of the small turning pile driver of one Embodiment, and is the side view at the time of the operation | work in the state in which the upper turning body provided with the leader turned sideways with respect to the lower turning body. It is the side view which showed the conventional pile driver equipped with the auger. It is the top view which showed the state turned about the predetermined angle about the conventional pile driver equipped with the auger.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Small turning pile driver 2 Lower traveling body 3 Upper turning body 5 Leader 6 Back stay 7 Power unit 8 Counterweight 9, 10 Winch 11 Front jack 12 Telescopic arm 20 Crawler 21 Bracket 22 Slide case 23 Slider 24 Hydraulic cylinder 30 Main body 50 Auger 60 Stir rod

Claims (4)

A small turning pile driver in which an upper turning body is mounted on the lower traveling body so as to be able to turn, a leader is erected on the upper turning body, and a work device can be mounted so as to move up and down along the leader. In
The upper swivel body has a power unit that is horizontally oriented with respect to the main frame, a counterweight mounted on the rear, and a telescopic arm that can be extended and retracted in the front-rear direction, holding a front jack. A small turning pile driver characterized in that, when the telescopic arm is extended, the front jack is positioned in front of the main frame beyond the position of the working device. In the small turning pile driver according to claim 1,
The small turning pile driver characterized in that the telescopic arms provided on both the left and right sides of the main frame are attached so as to be inclined so as to widen the space in the front direction of the main frame. In the small turning pile driver according to claim 1 or claim 2,
The front jack, when the telescopic arm contracts, is located on the main frame side of the position of the working device attached to the leader and fits within the lateral width of the lower traveling body. A featured small turning pile driver. In the small turning pile driver according to any one of claims 1 to 3,
A small swivel pile driving machine characterized in that the telescopic arm is configured such that an arm member combined so as to be extendable and contractable by a hydraulic cylinder extends and contracts.

Images