JP5621026B1 - Low-head excavator - Google Patents

Low-head excavator Download PDF

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JP5621026B1
JP5621026B1 JP2013186979A JP2013186979A JP5621026B1 JP 5621026 B1 JP5621026 B1 JP 5621026B1 JP 2013186979 A JP2013186979 A JP 2013186979A JP 2013186979 A JP2013186979 A JP 2013186979A JP 5621026 B1 JP5621026 B1 JP 5621026B1
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tubing
horizontal
low
frame
base
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JP2015055033A (en
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武一 山本
武一 山本
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山本基礎工業株式会社
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00Special methods or apparatus for drilling

Abstract

PROBLEM TO BE SOLVED: To carry in and install in a narrow excavation place having a width or height restriction, and can easily perform excavation work in a low space, and a vacant space around the excavation place with excavated earth and sand as a center. The purpose of the present invention is to provide a low-head excavator that is easy to remove by swiveling toward a space. A low-head excavator 10 comprising a base portion 11 having a traveling mechanism, a tubing portion 12 provided on the base portion 11, and a horizontal turning frame 13 provided on the tubing portion 12. The horizontal swivel frame 13 is disposed so as to be pivotable about the tubing portion 12, and changes its direction in a predetermined horizontal direction around the excavation site moved by the base portion 11. [Selection] Figure 6

Description

  The present invention relates to a low-headed excavator for excavating a narrow place where there is not enough work space such as in a platform or a tunnel.
  In foundation pile construction work at a construction site, excavation work is performed using an excavator that combines a gantry and a swivel boring machine. Specifically, an all-casing method is used in which a boring machine is swung and pushed into the soil while rotating the casing tube, and the soil in the casing is excavated by a hammer grab suspended from a gantry.
  In such an all casing method, first, a clamping device, a turning motor, a drawing cylinder, and the like included in the boring machine are operated by a hydraulic device. As a result, the casing tube is clamped by the clamping device and inserted into the soil by the drawing cylinder while being rotated by the turning motor. Next, the hammer grab suspended from the gantry is used to excavate the inside of the casing tube and discharge the soil after excavation to a place away from the casing tube (Patent Documents 1 and 2).
  This excavation work is performed by dropping a hammer grab suspended from a gantry into a casing tube, and then releasing the winch from a certain height. By this fall, the shell opened at the tip of the hammer grab enters into the soil, and when the winch is wound up from this state, the shell is closed and the earth and sand are scooped up.
  The casing tube is excavated until it reaches a predetermined depth while being connected with a lock pin. Then, the hammer grab is removed from the frame, and the rebar is suspended from the frame again. Insert into. Next, a treme tube for placing ready-mixed concrete is set, and a pile is placed in the soil as the ready-mixed concrete hardens by pulling out the casing tube with the boring machine while placing ready-mixed concrete with this tremy tube. Complete. The excavation work is completed when the ready-mixed concrete is finished and the casing tube is drawn.
  In the excavator, excavation and transportation are performed in a state where an excavation unit such as a hammer grab and a casing tube is suspended from a high place by a gantry, and thus a large work space is required in the sky. For this reason, there was a problem that the excavator cannot be used in places with roofs or places with height restrictions such as tunnels. As means for improving this, there has been disclosed a suspending and conveying apparatus that allows a casing tube, H steel, and the like to be transferred by sliding a gantry horizontally (Patent Document 3). This transfer device is placed on a self-propelled carriage and moves to the vicinity of a narrow work place where the sky is limited. And the rail which suspended the digging pipe etc. in the front-end | tip part is slid to the left-right direction, and it is repeatedly performed to embed in a predetermined excavation place.
JP-A-10-205261 JP-A-10-205263 Japanese Patent Laid-Open No. 8-48492
  As described above, in conventional excavators such as those disclosed in Patent Documents 1 and 2, a rotary press-fitting device is installed at a excavation site by a heavy machine such as a crane, and excavation is performed via the rotary press-fitting device. The casing tube and hammer grab to be carried in are carried in by the heavy machinery, so that it was difficult to work in a small work space. In addition, there is a problem that excavation at a sufficient depth cannot be performed because a large crane cannot be used in a place with a height restriction.
  On the other hand, in the suspension conveyance device disclosed in Patent Document 3, since the first and second rails corresponding to the conventional gantry are installed in the horizontal direction, there is a narrow space with an upper limit. It is possible to transport the object to be transported to a predetermined work place by sliding the object to be transported such as a digging pipe or H steel by the rail at the place. However, this suspension conveying apparatus is an apparatus intended to convey a conveyed object such as the digging pipe or H steel in a state where it is suspended in the horizontal direction. For this reason, it has a structure in which the object to be conveyed is suspended from the tip of the rail that expands / contracts. There is a case. Furthermore, since the hammer grab for digging up soil and rocks and the casing tube pushed into the ground are heavy, there is also a problem that the conveyance itself is not easy only with the rail.
  Moreover, when discharging the earth and sand dug up by the hammer grab from the excavation site, the crane has to be moved, for example, and the earth removal work is complicated.
  Accordingly, an object of the present invention is to carry in and install in a narrow excavation place having a width or height restriction, and can easily perform excavation work in a low space, and the excavated earth and sand etc. are centered on the excavation place. A low-head excavator that is easy to perform earth removal work by turning and moving toward the surrounding empty space.
In order to solve the above problems, a low-head excavator of the present invention includes a base portion having a traveling mechanism, and a rotary push ring provided on the base portion for press-fitting into the ground while rotating the casing tube. a tubing portion having, provided on the tubing section, as well as the horizontal pivot to a Jo Tokoro direction, and a horizontal pivot frame tip protrudes from the tubing portion, is supported in a suspended state can move horizontally in the horizontal pivoting frame A low-head excavator equipped with a hammer grab, wherein the horizontal swivel frame swivels horizontally in the predetermined direction around the tubing part, and the hammer grab is placed on the tubing part from the top of the horizontal swivel frame. It is characterized by moving horizontally.
  According to the low sky head excavator of the present invention, the base portion having the traveling mechanism can be moved in a state where the tubing portion is mounted, so that it is possible to easily enter a narrow excavation place and perform the excavation work as it is. Further, by turning the horizontal turning frame in a predetermined horizontal direction, the earth and sand excavated at the excavation site can be horizontally moved and discharged as it is. For this reason, it is possible to efficiently perform a series of operations from excavation to earth removal in a narrow space in the upper work space.
It is a side view which shows the running posture of the low sky head excavator which concerns on this invention. It is a rear view which shows the said running posture. It is a side view which shows the excavation work attitude | position by the said low head excavator. It is a rear view which shows the said excavation work attitude | position. It is a rear view which shows the positional relationship of the crawler part in a base part. It is a top view of the said low head excavator. It is a perspective view of a horizontal turning frame. It is sectional drawing of the said horizontal turning frame. It is a top view which shows the upper surface structure of a tubing part. It is principal part sectional drawing which shows the effect | action of a turning guide part. It is a top view which shows the usage example of the said low head excavator.
  Embodiments of a low-head excavator according to the present invention will be described below in detail with reference to the accompanying drawings. Here, FIG. 1 and FIG. 2 show the usage state during traveling of the low-head excavator, and FIG. 3 and FIG. 4 show the usage state during excavation work.
  A low-head excavator (hereinafter referred to as an excavator) 10 according to the present invention allows excavation work by entering a narrow building such as a platform, a tunnel, or a garage having a height restriction in the sky. A base part 11 having a traveling mechanism for moving to a digging place, and a tubing part 12 provided on the base part 11 and press-fitted into the ground while rotating a digging unit (casing tube) 21 having a cutter at the tip. And a horizontal swivel frame 13 for discharging the earth and sand excavated by the excavating unit (hammer grab) 22 having a shell that can be opened and closed on the tubing portion 12 to a predetermined place. Yes.
  The base portion 11 has a quadrilateral cart portion 14 on which the tubing portion 12 can be placed, and a traveling mechanism (crawler portion) 15 provided on the cart portion 14 and capable of traveling on rough terrain. Configured. The crawler unit 15 includes a pair of moving wheels 16a, a plurality of auxiliary wheels 16b, and a rubber crawler belt 16c. Further, the base portion 11 is provided with a controller (not shown) for controlling the rotation of drive motors for driving the crawler portion 15 by radio or the like, and is capable of moving forward, backward, and turning left and right from a remote location. Each operation and speed adjustment are possible.
  The carriage part 14 is provided with support legs 17 which can be raised and lowered at the four corners of the bottom part, and fixed legs 18 for fixing the base part 11 at at least one place on the front side or the rear side part. As shown in FIGS. 1 and 2, when the base portion 11 is moved toward the target excavation site, the four support legs 17 are placed in the carriage portion 14 so that the crawler belt 16c is grounded. Contained. On the other hand, when performing excavation work, as shown in FIGS. 3 and 4, the entire excavator 10 is horizontally supported by the four support legs 17 extending to a predetermined height. Each of the support legs 17 can be expanded and contracted independently by a hydraulic cylinder. When the support legs 17 are moved to the excavation site by the base portion 11, they are expanded or contracted according to the unevenness of the ground surface, and the tubing portion 12 is horizontally Adjusted to be kept at Each support leg 17 is provided with a horizontal reference device (not shown) for leveling.
  The fixed leg 18 can be driven up and down by a hydraulic cylinder in the same manner as the support leg 17, and after the tubing part 12 is leveled by the support leg 17, the tip part is buried in the ground. To be typed in. This makes it possible to stabilize the excavator 10 so that it does not move when excavating with the casing tube 21 or the hammer grab 22 or when turning the horizontal turning frame 13.
  Further, as shown in FIG. 5, a crawler mounting portion 19 that can adjust the height position of the crawler portion 15 stepwise is provided between the crawler portion 15 and the carriage portion 14. The crawler mounting portion 19 is provided with a plurality of pin holes 20 having different heights, and the driving wheel 16a is mounted through the pin hole 20 at a predetermined height position, thereby adjusting the height of the carriage portion 14 during traveling. be able to. This is to prevent the protruding portion of the casing tube 21 from obstructing travel when the base portion 11 is retracted after the casing tube 21 is pushed in the excavation site. The adjustment width h3 of the crawler mounting portion 19 is set to about 40 cm at maximum in consideration of the height of the protruding portion of the casing tube 21.
  FIG. 6 shows the excavator 10 as viewed from above. The opening at the center of the tubing portion 12 is pressed into the ground while rotating the casing tube 21 shown in FIG. 3, or the hammer shown in FIG. A circular insertion hole 23 for dropping the grab 22 is formed. The insertion hole 23 is provided so as to penetrate the bottom surface of the carriage portion 14, and a rotary push ring (push cylinder) 24 that clamps and rotates the outer peripheral surface of the casing tube 21 is provided on the inner side surface of the insertion hole 23. It is done. A turning guide portion (circulation lane) 25 is provided on the upper surface of the tubing portion 12 along the outer periphery of the insertion hole 23. As shown in FIG. 7, the circulation lane 25 guides the movement of the arm portion 26 that supports the horizontal turning frame 13. A lower end surface of the second arm 38 constituting the arm portion 26 is placed in the circulation lane 25 via a roller 39.
  As shown in FIGS. 6 to 8, the horizontal revolving frame 13 includes a horizontal frame 28 constituted by a pair of guide rails 27 extending in a straight line and a carriage that moves between the pair of guide rails 27. 29 and an arm portion 26 that supports the horizontal base 28 so as to be able to rotate in a circulation lane 25 on the tubing portion 12. Guide grooves 30 are formed on the opposing inner side surfaces of the pair of guide rails 27 for mounting the carriage 29 so as to be movable in the horizontal direction. In addition, on the lower side, a rack 31 is provided that includes a plurality of teeth that extend linearly along the longitudinal direction.
  The carriage 29 is provided with a pulley 32 that suspends and supports the casing tube 21 and the hammer grab 22 at one end, and a wire 33 for raising and lowering the casing tube 21 and the hammer grab 22 via the pulley 32 at the other end. A winch 34 for performing a winding operation is disposed. Further, traveling wheels 35a and auxiliary wheels 35b guided by the guide grooves 30 are provided on the upper stage on both side surfaces in the longitudinal direction of the carriage 29, and pinions 36 that mesh with the rack 31 are provided on the lower stage. It is configured to reciprocate linearly along the rack 31. The pinion 36 can be rotated forward, reverse, or stopped by a rotation drive mechanism (not shown) provided in the carriage 29, and can freely advance, retreat, or move in a predetermined position along the direction in which the guide groove 30 extends. It can be stopped.
  A casing tube 21 and a hammer grab 22 are directly suspended from a pulley 32 provided in the carriage 29. As shown in FIG. 3, the casing tube 21 protects a hole wall to be excavated. The casing tube 21 is made of a steel plate having a diameter suitable for the size of the hole to be excavated and has a cylindrical body part 21a and the body part 21a. It is formed by a cutter 21b made of special steel provided at the tip. The casing tube 21 is sequentially press-fitted into the ground while adding several tubes. As shown in FIG. 4, the hammer grab 22 is used for deep hole excavation and root cutting of a building foundation, and is provided with a pair of cylindrical body portions 22a and a pair of opening portions that can be opened and closed at the front ends of the body portions 22a. A shell 22b is provided. A mechanism for opening and closing the shell 22b by a winding operation of the wire 33 is incorporated in the body portion 22a.
  As shown in FIG. 4, the excavator 10 having the above structure has a maximum height h1 of the horizontal mount 28 within about 3.5 m from the ground surface in a narrow working environment where the height h2 from the ground surface is about 4 m. The structure is lowered so that For this reason, the total length of the hammer grab 22 is formed shorter than the conventional one. As a result, the entire weight of the hammer grab 22 is reduced, and therefore, measures such as increasing the thickness of the steel plate material of the body portion 22a or adding a separate weight to the body portion 22a are taken so as to obtain a predetermined weight. It is done.
  As shown in FIG. 4, the hammer grab 22 is lifted above the tubing portion 12 by a wire 33 and dropped at a predetermined height position. At the time of the fall, the shell 22b is in an open state and pierces into the ground as it is. From this state, the wire 33 is wound up by the winch 34, so that the shell 22b is closed while holding an excavated material such as soil or rock.
  Each of the arm portions 26 constituting the horizontal swing frame 13 is composed of four, and a first arm 37 extending from the lower end of the central portion of the horizontal frame 28 and a space between the first arm 37 and the lower portion of the horizontal frame 28. And a second arm 38 which is attached to the first arm 37 so as to be extendable and placed on the circulation lane 25. A roller 39 is provided at the lower end of each of the second arms 38, and the rotation surface of the roller 39 is disposed so as to contact the bottom of the circulation lane 25. Each main body arm 26a is constituted by a hydraulic cylinder, and is low when the excavator 10 travels by the crawler 15 as shown in FIGS. 1 and 2, and as shown in FIGS. When moved to the excavation site, it can be expanded and contracted so as to extend to a predetermined height.
  FIG. 9 shows a planar configuration of the orbiting lane 25 on which the horizontal turning frame 13 is turnably supported. The second arm 38 placed in the circulation lane 25 is provided with a flange 43 that contacts the outer edge of the circulation lane 25 and guides the circulation movement of the second arm 38. Further, the flange 43 is provided with a fixing hole 44 at a location where the flange 43 comes into contact with the outer edge of the circulation lane 25. The second arm 38 moves in the circulation lane 25 with the rotation of the pushing cylinder 24 attached via the connecting member 40 and stops at a predetermined turning position. On the other hand, the circumferential lane 25 is provided with a plurality of fixing holes along the outer edge contacting the flange 43 at a predetermined interval, and the position and position of the hole where the second arm 38 has moved. By aligning and pinning both holes 42 and 44 as described later, the position of the second arm 38 can be fixed at a predetermined position in the circulation lane 25.
  As shown in FIG. 10A, the horizontal turning frame 13 connects the lower portion of the second arm 38 and one end of the pushing cylinder 24 of the tubing portion 12 via a connecting member 40, thereby pushing the pushing cylinder 24. The entire horizontal swivel frame 13 can be swung in a predetermined horizontal direction in conjunction with the rotational drive. As a result, the hammer grab 22 conveyed by the carriage 29 from above the tubing part 12 can be moved to an empty space set in a predetermined direction to discharge earth and sand. When the casing tube 21 is used or when it is not necessary to turn the horizontal turning frame 13 during excavation work, as shown in FIG. 10B, the connecting member 40 is removed and the second arm 38 is attached. The connection with the pushing cylinder 24 is released. And in order to fix the horizontal turning frame 13 on the tubing part 12, the hole 44 provided in the flange 43 of the 2nd arm 38, and the circulation lane in the position which turned the horizontal turning frame 13 to the predetermined direction The 25 side hole 42 is fixed through the pin member 41. Thereby, the horizontal turning frame 13 can be fixed on the tubing part 12 at a position oriented in a predetermined horizontal direction.
  In the present embodiment, the horizontal turning frame 13 is installed so as to be able to turn in the horizontal direction by using the rotation mechanism of the pushing cylinder 24 provided in the tubing unit 12, but a rotating table that can be separately rotated is provided on the tubing unit 12. The arm portion 26 may be attached to the rotary table. At that time, the horizontal turning frame 13 can be fixed at an arbitrary rotational position by controlling the rotation angle of the rotary table.
  FIG. 11 shows a construction example in which a part of the platform 51 is excavated by using the excavator 10 of the present invention. The excavator 10 is carried into the track 52 by remotely operating the base unit 11, and moved from the track 52 to the target excavation site 50. This excavation place 50 is a place where a part along the track of the track 52 is cut out in a U-shape, and has a space in which the base portion 11 can be carried. Then, the base portion 11 is moved and stopped so that the central portion of excavation coincides with the central portion of the tubing portion 12.
  With the base part 11 stopped, as shown in FIGS. 3 and 4, the four support legs 17 provided on the carriage part 14 are extended to the ground, and the horizontal reference unit provided on each support leg 17 is provided. While confirming, the expansion and contraction is adjusted so that the tubing portion 12 is in a horizontal state. After the leveling of the tubing part 12 is completed, in order to fix the excavator 10 as a whole, the fixing leg 18 provided on the carriage part 14 is lowered and its tip part is driven into the ground.
  As shown in FIG. 4, the excavation work is performed in a state where the arm portion 26 is extended to the maximum and the horizontal mount 28 is set at a high position. The height h1 from the ground surface to the top of the horizontal mount 28 is the height of the arm because it can be used in a building such as a warehouse or a garage with a limited work space in the sky or in a tunnel. When the portion 26 is extended to the maximum, it is set to be within 3.5 m. At the excavation site, the casing tube 21 is first rotationally pressed into the ground. The casing tube 21 moves the carriage 29 along the guide rail 27 to the excavation site on the tubing portion 12 while being suspended by the wire 33 via the pulley 26. Then, by operating the winch 34, the wire 33 is lowered and the casing tube 21 is inserted into the tubing portion 12. The casing tube 21 inserted into the tubing portion 12 is gradually pushed into the ground from the tip portion where the cutter 21b is provided while rotating with the outer periphery clamped by the pushing cylinder 24. In the pushing process of the casing tube 21, the link between the arm portion 26 and the pushing cylinder 24 is released so that the horizontal turning frame 13 does not turn.
  After the press fitting of the casing tube 21 is completed, the hammer grab 22 is attached to the pulley portion 26. At this time, as shown in FIG. 10A, the second arms 38 extending below the horizontal mount 28 and the push cylinder 24 are connected by the connecting member 40, and the push cylinder 24 is rotated at a low speed in a predetermined direction. Drive. By this rotational drive, the second arm 38 supported via the roller 39 sequentially moves along the circulation lane 25, and the horizontal base 28 is set in a predetermined horizontal direction. The horizontal base 28 is disposed so as to be able to turn 360 ° around the tubing portion 12. By turning the horizontal base 28, the earth and sand excavated at the place where the tubing portion 12 is installed can be discharged toward the surrounding empty space without moving the base portion 11. After positioning the horizontal base 28, as shown in FIG. 10B, the connecting member 40 connecting the second arm 38 and the pushing cylinder 24 is removed, and along the edge of the circulation lane 25. Then, the holes 42 provided at a predetermined interval and the holes 44 of the flange 43 provided on the second arm 38 are combined and fixed by passing the pin member 41.
  After the fixing of the horizontal base 28 is completed, the carriage 29 is moved to position the hammer grab 22 directly above the casing tube 21 press-fitted into the ground by the tubing portion 12. Then, the hammer grab 22 is dropped into the casing tube 21 from this position, and the tip of the open shell 22b is driven into the ground. Thereafter, the winch 34 is wound up to close the shell 22b and dig up the ground. After this digging operation, the hammer grab 22 is pulled up from the casing tube 21 and the carriage 29 is advanced along the guide rail 27 to the tip. At this position, the excavated material such as excavated soil and rock can be discharged by opening the shell 22b. By repeating such an operation, the hammer grab 22 is reciprocated in the horizontal direction between the casing tube 21 and the discharge location by the carriage 29, thereby excavating and discharging the soil in a place where the space is limited. Can be performed easily and efficiently. The casing tube 21 is sequentially buried in the ground along with the excavation work by the hammer grab 22, and the casing tube for connection is sequentially added to be arranged to a predetermined depth position.
  When the excavator 10 is moved after the excavation work is finished, the horizontal swivel frame 13 is returned to the original swivel position, and the arm 26 is shortened and the horizontal mount 28 is fixed at a low position. . Then, as shown in FIG. 5, by setting the position of the crawler portion 15 provided on the carriage portion 14 to the lower side of the crawler mounting portion 19, the grounding position of the crawler portion 15 can be changed from the bottom portion of the carriage portion 14. Set it apart. Thereby, the base part 11 can be moved without contacting the protrusion part of the casing tube 21 embed | buried in the ground.
  After the position setting of the crawler unit 15 is finished, the fixed leg 18 is pulled up from the ground and the four support legs 17 are accommodated in the carriage unit 14 so that the crawler unit 15 is grounded to the ground, and the base unit 11 can be moved. Then, by retreating from the excavation site 50 by remote operation, it can be retracted out of the work site via the track 52.
  As described above, the excavator 10 of the present invention can directly enter the base portion 11 provided with the tubing portion 12 even in a narrow place where the conventional excavator cannot enter. In addition, the horizontal turning frame 13 installed on the tubing unit 12 so as to be able to turn allows the excavated earth and sand to be discharged in a predetermined direction, so that the work efficiency in the low sky is greatly improved. The Rukoto. In the above embodiment, an example in which a platform such as a station is excavated is shown, but in a place where there is a restriction on the work space in the sky such as in a tunnel or a building with a roof such as a warehouse, Efficient excavation work can be performed.
10 excavator (low-head excavator)
DESCRIPTION OF SYMBOLS 11 Base part 12 Tubing part 13 Horizontal turning frame 14 Carriage part 15 Crawler part 16a Driving wheel 16b Auxiliary wheel 16c Crawler belt 17 Support leg 18 Fixed leg 19 Crawler attaching part 20 Pin hole 21 Casing tube (excavation unit)
21a body part 21b cutter 22 hammer grab (excavation unit)
22a fuselage 22b shell 23 insertion hole 24 push cylinder (rotary push ring)
25 lap lane (turning guide)
26 Arm part 27 Guide rail 28 Horizontal mount 29 Carriage 30 Guide groove 31 Rack 32 Pulley 33 Wire 34 Winch 35a Running wheel 35b Auxiliary wheel 36 Pinion 37 First arm 37a Beam part 38 Second arm 39 Roller 40 Connecting member 41 Pin member 42 Hole 43 Flange 44 Hole 50 Excavation site 51 Platform 52 Track

Claims (5)

  1. A base portion having a traveling mechanism;
    A tubing portion provided on the base portion and having a rotation push ring for press-fitting into the ground while rotating the casing tube;
    Provided on the tubing section, as well as the horizontal pivot to a Jo Tokoro direction, and a horizontal pivot frame tip protrudes from the tubing section,
    A low-head excavator comprising a hammer grab suspended and supported by the horizontal swivel frame so as to be horizontally movable,
    The low-head excavator characterized in that the horizontal turning frame horizontally turns in the predetermined direction around the tubing part, and the hammer grab horizontally moves from the tubing part toward the tip of the horizontal turning frame. .
  2. The base portion includes a traveling mechanism including a crawler portion, a carriage portion on which the crawler portion is attached at a predetermined height position and the tubing portion is placed, and supports the carriage portion at a predetermined height position. The low-head excavator according to claim 1 , comprising a plurality of support legs and fixed legs that can be expanded and contracted.
  3. The tubing portion has a through hole of the casing tube, and the rotary push ring that rotates along the inner surface of the insertion hole, provided along the outer periphery of the rotary push ring, the predetermined direction of the horizontal rotating frame The low-head excavator according to claim 1 , further comprising a turning guide portion that guides turning to the right.
  4. 4. The low sky according to claim 3 , wherein the horizontal turning frame has an arm portion mounted on the turning guide portion, and the arm portion and the rotary push ring are detachably connected via a connecting member. Head excavator.
  5. The low-head excavator according to claim 4 , wherein the arm portion is provided so as to be extendable and retractable, and the horizontal turning frame is supported above the tubing portion so as to be turnable at a predetermined height.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6088093B1 (en) * 2016-06-17 2017-03-01 山本基礎工業株式会社 Low head excavator and horizontal frame height position adjustment method in low head excavator

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6554341B2 (en) * 2015-06-22 2019-07-31 植田基工株式会社 Construction method of foundation pile
JP6559374B1 (en) * 2019-03-11 2019-08-14 山本基礎工業株式会社 Low head excavator and its assembly method

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Publication number Priority date Publication date Assignee Title
JPH1150455A (en) * 1997-08-04 1999-02-23 Nippon Sharyo Seizo Kaisha Ltd Moving method of tubing mechanism and device thereof
JPH11324546A (en) * 1998-05-08 1999-11-26 Nippon Sharyo Seizo Kaisha Ltd Self-running type all-casing excavator
JP2000313587A (en) * 1999-04-28 2000-11-14 Kinki Ishiko Kk Moving device
JP2004003291A (en) * 2002-04-12 2004-01-08 Nippon Sharyo Seizo Kaisha Ltd Self-propelled tubing device
JP2010106615A (en) * 2008-10-31 2010-05-13 Yamamoto Kiso Kogyo Kk Low empty head type excavating device
JP2011179172A (en) * 2010-02-26 2011-09-15 Yamamoto Kiso Kogyo Kk Hammer grab

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1150455A (en) * 1997-08-04 1999-02-23 Nippon Sharyo Seizo Kaisha Ltd Moving method of tubing mechanism and device thereof
JPH11324546A (en) * 1998-05-08 1999-11-26 Nippon Sharyo Seizo Kaisha Ltd Self-running type all-casing excavator
JP2000313587A (en) * 1999-04-28 2000-11-14 Kinki Ishiko Kk Moving device
JP2004003291A (en) * 2002-04-12 2004-01-08 Nippon Sharyo Seizo Kaisha Ltd Self-propelled tubing device
JP2010106615A (en) * 2008-10-31 2010-05-13 Yamamoto Kiso Kogyo Kk Low empty head type excavating device
JP2011179172A (en) * 2010-02-26 2011-09-15 Yamamoto Kiso Kogyo Kk Hammer grab

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6088093B1 (en) * 2016-06-17 2017-03-01 山本基礎工業株式会社 Low head excavator and horizontal frame height position adjustment method in low head excavator

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