JP3641799B2 - Steel pipe pile rotary burying equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention mainly relates to a steel pipe pile rotary embedding device for embedding a steel pipe pile in the ground while the upper limit is restricted in a building.
[0002]
[Prior art]
In general, in the foundation work for constructing a structure, piles are piled down to make it difficult to support the structure, and the load is transmitted to a solid lower layer. Pile driving is performed by burying long piles in the ground according to the structure. As a method of burying piles in the ground, the piles are struck with a pile driving machine or pressed into a cylinder. Or burying piles. Wood, concrete, or steel is generally used as the pile, but recently, steel pipes that are mainly lightweight and strong have been increasingly used.
[0003]
Conventionally, when embedding a steel pipe pile, the steel pipe pile is generally held by an auger device and is buried while rotating by driving a speed reducer disposed in the auger device. The auger device is usually attached to the upper part of a leader vertically mounted on a heavy machine, and has a drive motor and a speed reducer connected from the drive motor, and is configured to grip the upper end portion of the steel pipe pile. It was.
[0004]
[Problems to be solved by the invention]
However, when constructing steel pipe piles in a building where there is an upper limit such as the ceiling, the height of the leader itself is limited and the upper end of the steel pipe pile is gripped by the auger device. In addition, the length of the steel pipe pile is limited, and it can only be used with a short length. In other words, in the conventional steel pipe pile rotary embedding device, not only the height of the leader is limited and shortened, but also the auger device mounted on the top of the leader has a drive motor and a reducer in the vertical direction. Since the steel pipe pile is gripped at the lower end of the reducer, it is lost in the height direction due to the length of the auger device, and the effective construction length of the steel pipe pile is shortened and shortened. It was necessary to bury several steel pipe piles. Therefore, the work of gripping the steel pipe piles to the auger device and the welding work at each place for joining the short steel pipe piles are necessary, and it is difficult to shorten the delivery time because the time involved in the construction work is greatly increased. there were.
[0005]
This invention solves the above-mentioned subject, and is constructed so that a steel pipe pile as long as possible can be used at the time of steel pipe pile embedding work in a place where the height is limited. The purpose of the present invention is to provide a steel pipe pile rotary burying device that can reduce the construction work, shorten the delivery time, and reduce the construction cost.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the steel pipe pile rotary burying apparatus according to the present invention is configured as follows. That is,
A steel pipe pile rotary burying apparatus having a rotary buried part that holds and rotates a steel pipe pile buried in the ground, and a leader that arranges the rotary buried part to be movable up and down,
The rotary burying unit has a lifting unit that is connected to the leader and moves up and down, and a holding unit that extends in a horizontal direction from a side end surface of the lifting unit,
The holding part is connected to the elevating part so as to be rotatable about a horizontal direction as an axis, and the holding part is formed with a hollow part through which the steel pipe pile is inserted,
In the hollow portion, a chuck portion for holding the steel pipe pile is disposed,
The chuck portion is connected to a rotation drive unit that rotates the steel pipe pile with respect to the axis of the steel pipe pile ,
The leader has a lifting screw made up of one screw member standing upright in the vertical direction, and a lifting guide made up of a pair of shafts standing up in parallel with the lifting screw, of the rotary embedded portion An elevating part is screwed to the elevating screw and is formed to be engageable with the elevating guide so as to be movable up and down with respect to the reader.
The lower part of the leader is provided with a pair of opening / closing levers pivotally attached to the elevating screw in order to hold the lower part of the steel pipe pile held on the rotary buried part from both sides. Is.
[0007]
Preferably, the rotation drive unit includes a drive motor and a reduction gear that reduces the rotation of the drive motor, and the reduction gear is inserted into a hollow portion of the holding unit so that the chuck unit is detachable. Anything is acceptable.
[0010]
【The invention's effect】
The steel pipe pile rotary embedding device of the present invention has a holding part that holds the steel pipe pile as described above, and has a hollow part that penetrates the steel pipe pile, and a holding part that extends in the horizontal direction with respect to the lifting part, Since the horizontal direction can be pivoted, when the rotating embedded part is lowered to the lower part of the leader, the holding part is rotated by 90 ° and the steel pipe pile is inserted into the hollow part in the horizontal state, and the center part of the steel pipe pile If the holding part is gradually rotated backward to 0 ° as the rotating buried part is raised above the leader, the steel pipe pile can gradually rise to a vertical state, and the steel pipe pile The upper end can reach a position above the rotary buried portion. The steel pipe pile which stood up is embed | buried in the ground, rotating, when the drive from a rotation drive part is transmitted via a reduction gear.
[0011]
Therefore, when constructing in a building, it is possible to use long steel pipe piles that are effectively extended almost 100% up to the height of the ceiling, and the trouble of welding and adding short steel pipe piles There is no need to perform such work. And since a rotation embedding part can be hold | maintained in the middle position of a steel pipe pile, the height of a leader can be shortened and apparatus itself can be comprised compactly.
[0012]
Moreover, since the chuck | zipper which hold | maintains a steel pipe pile is detachably arrange | positioned at the reduction gear arrange | positioned in the hollow part of a holding | maintenance part, it can replace | exchange for a predetermined chuck with the magnitude | size of a steel pipe pile.
[0013]
In addition, since the elevating part of the rotary embedded part is screwed into the elevating screw of the leader and engaged with the elevating guide, the rotary embedded part can be moved up and down while maintaining a state parallel to the vertical direction. The pile can be stably raised from the horizontal state to the vertical state.
[0014]
Furthermore, by opening the open / close lever attached to the lower part of the leader until the steel pipe pile is inserted from the horizontal state into the chuck of the rotary embedded part and started up, the steel pipe pile held by the chuck can be smoothly opened. If the open / close lever is closed after the steel pipe pile has started up in a vertical state, the steel pipe pile can be prevented from swinging, and the embedding operation can be performed easily and stably.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0016]
As shown in FIG. 1, the steel pipe pile rotary embedding device (hereinafter referred to as an embedding device) M of this embodiment includes a leader 10 and a rotary embedding unit 20 that moves up and down along the leader 10. . The embedding device M is mounted on a heavy machine (not shown), moved to the vicinity of the construction site, and buried in the ground while rotating the steel pipe pile P while holding the steel pipe pile P.
[0017]
As shown in FIGS. 2 to 5, the leader 10 includes a main body portion 11 formed of a square pipe and erected in the vertical direction, and connecting members 13 and 14 (see FIG. 1) and an elevating screw portion 12 that is erected in parallel with the main body portion 11, and an upper portion and a lower portion of the main body portion 11 that are integrally connected to the main body portion 11 and are raised and lowered in parallel with the elevating screw portion 12. It has a pair of elevating guides 16 and 16 erected at positions facing each other with the screw portion 12 as the center. The ascending / descending screw portion 12 is a pipe having a hollow inside, and a male screw is formed on the outer peripheral surface over substantially the entire length. The raising / lowering guide 16 is formed with a hollow pipe shaft.
[0018]
As shown in FIG. 1, a hoisting machine 17 is attached to the upper connecting member 13, and a rope 18 connected to the hoisting machine 17 has a hook 19 so that the steel pipe pile P can be suspended. doing.
[0019]
The rotary burying unit 20 is supported by the leader 10 and can be moved up and down with respect to the leader 10, and the holding unit 30 that extends in the horizontal direction from the side end surface of the lifting unit 21 and holds the steel pipe pile P. It is configured.
[0020]
The elevating part 21 has a base part 22 having a female thread part 22a that is screwed into the elevating screw part 12 of the leader 10, and both arm parts that project from both ends of the base part 22 so as to spread at an obtuse angle toward the opposite body part 11 side. 23 and 23, and a guide portion 24 whose both end portions are formed in a semicircular shape to engage the pair of lifting guides 16 and 16 and are integrally fixed at the tips of both arm portions 23 and 23. It is formed in a hollow substantially triangular shape. An insertion hole 25 is formed in the guide portion 24 in the horizontal direction, and a bearing member 26 is press-fitted.
[0021]
The holding portion 30 includes a shaft portion 31 that is rotatably supported by the bearing member 26 of the guide portion 24, and a holding rotation portion 35 that is fixed to the shaft portion 31 with a bolt and holds and rotates the steel pipe pile P. The holding rotation part 35 is formed with a hollow part 36 for inserting the steel pipe pile P.
[0022]
A male screw part 31 a is formed on the shaft part 31, and a nut member 32 is screwed onto the male screw part 31 a so as to prevent the shaft part 31 from dropping from the guide part 24.
[0023]
In addition, a drive motor 37 disposed above the holding and rotating unit 35 is attached to the holding and rotating unit 35 so that the drive shaft 38 is positioned downward in the holding and rotating unit 35. 39 is attached.
[0024]
On the other hand, a hollow large gear 40 that meshes with a small gear 39 is fitted into the hollow portion 36 via a hollow portion 36 and a bearing member 41, and a chuck 42 is detachably mounted inside the large gear 40. . The chuck 42 is formed with an insertion hole 43 through which the steel pipe pile P is inserted, and is provided with a gripping claw portion 44 for gripping the steel pipe pile P, and a spline-like tooth portion is formed on the outer peripheral surface of the chuck 42. The spline-like tooth portion formed on the inner peripheral surface of the large gear 40 is engageable.
[0025]
The engagement between the large gear 40 and the chuck 42 is not limited to the above-mentioned spline, but may be another engagement pair such as a serration or a gear. Moreover, the chuck | zipper 42 shown in FIG. 4 shows one form, and is suitable for holding the thing with which the outer peripheral surface of the steel pipe pile P is not processed, and the outer peripheral surface of the steel pipe pile P is easy to slip. If it exists, what forms the nail | claw in the axial direction in the outer peripheral surface of the steel pipe pile P, and forms the recessed part engaged with this nail | claw in the chuck | zipper 42 should just be used. Further, chucks 42 having different gripping diameters according to the diameter of the steel pipe pile P are mounted. In any case, since the engaging portion formed on the outer peripheral surface of the chuck 42 is engaged with the engaging portion on the inner peripheral surface of the large gear 40, the gripping claw portion 44 of the chuck is different. Are formed in the same shape.
[0026]
And the disk-shaped lower cover 45 in which the insertion hole of the steel pipe pile P was formed is attached to the lower surface side of the holding | maintenance rotation part 35 so that the hollow part 36 may be plugged except the site | part through which the steel pipe pile P penetrates. The large gear 40 and the chuck 42 are supported so as to prevent them from falling. Further, an upper lid 46 having an insertion hole for the steel pipe pile P is attached to the upper surface side of the holding rotating portion 35 so as to face the lower lid 45.
[0027]
Accordingly, since the holding rotation unit 35 is connected to the lifting unit 21 so as to rotate with respect to the shaft unit 31 with respect to the lifting unit 21, the insertion hole 43 of the chuck 42 has the horizontal direction as the center. The angle can be changed, and the steel pipe pile P can be inserted in a state in which the insertion hole 43 of the chuck 42 is rotated to an angle at which the steel pipe pile P can be easily inserted. Can be rotated.
[0028]
As shown in FIGS. 6 to 7, an anti-sway part 50 including a pair of opening / closing levers 51 and 52 having one end rotatably attached to the lower part of the elevating screw part 12 is attached to the lower part of the reader 10. . Each of the open / close levers 51 and 52 has a position where the tip end grips the steel pipe pile P around the axis of the lifting screw part 12 when the steel pipe pile P is in a position where the steel pipe pile P is held in a state perpendicular to the rotary embedding part 20. Gripping portions 53 and 54 are provided at the tip portions, respectively, so that the lower portion of the steel pipe pile P can be gripped when closed. Since the steel pipe pile P is buried in the ground while rotating while being held by the holding portions 53 and 54, it is desirable that the holding portions 53 and 54 be formed of a resin material that is more elastic than the steel material. .
[0029]
And when each opening-and-closing lever 51 and 52 opens, a channel | path is formed so that the steel pipe pile P can pass along the axis line of the penetration hole 43 of the chuck | zipper 42 of the rotation embedding part 20. FIG. As shown in the cross-sectional view of FIG. 7, one open / close lever 51 is formed in a U shape in a front cross-sectional view, and the other of the open / close levers 51 and 52 is pivotally attached to the lifting screw portion 12. The opening / closing lever 52 may be formed so as to be inserted into the U-shaped recess.
[0030]
Next, the effect | action of the burying apparatus comprised as mentioned above is demonstrated based on FIGS.
[0031]
In the state in which the embedding device M does not hold the steel pipe pile P, the rotary embedding unit 20 is disposed at an upper position with respect to the leader 10 as shown in FIG. The steady rest 50 attached to the lower part of the reader 10 is in a saddle state in which the open / close levers 51 are closed. The rope 18 remains suspended without holding the steel pipe pile P.
[0032]
Next, when the steel pipe pile P is held by the rotary burying portion 20, as shown in FIG. 9, the rotary burying portion 20 is rotated by the lifting screw portion 12 by a motor (not shown), so that the guide portion 24 is moved up and down. It descends while being guided by 16,16. When the rotary embedding unit 20 moves to the lower part of the reader 10, the holding unit 30 is rotated about 90 ° with respect to the lifting / lowering unit 21, and the axis of the hollow portion 36 (the insertion hole 43 of the chuck 42) of the holding rotation unit 35 is rotated. Make it almost horizontal. The rotating operation of the holding unit 30 is performed manually, but can be automatically performed if the shaft unit 31 of the holding unit 30 is configured to be rotated by a motor or the like.
[0033]
On the other hand, the steel pipe pile P to be buried is wound by the rope 18 and held in a horizontal state, and the steel pipe pile P is moved to a position facing the insertion hole 43 of the chuck 42 of the holding rotating portion 35. In this state, the steady rest part 50 opens the open / close levers 51 and 52 as shown by the two-dot chain line in FIG. The operation of opening the open / close levers 51 and 52 may be performed manually or automatically by a motor or the like.
[0034]
The tip of the steel pipe pile P is inserted into the insertion hole 43 and the steel pipe pile P is gripped by the chuck 42. At this time, it is preferable to insert the tip of the steel pipe pile P as far as possible from the holding rotation part 35 and to grip the chuck 42 around the intermediate position of the steel pipe pile P.
[0035]
As shown in FIG. 10, the rotary burying portion 20 that holds the steel pipe pile P is moved upward by rotating a motor (not shown) in the direction opposite to that described above. The holding rotary part 35 holding the steel pipe pile P with the chuck 42 is moved up and down in the direction in which the steel pipe pile P is raised in the vertical direction by the gravity of the steel pipe pile P held by the rope 18 as the rotary buried part 20 rises. Is rotated against. The open / close levers 51 and 52 of the steady rest portion 50 remain open.
[0036]
As shown in FIG. 11, the steel pipe pile P rises when the rotary buried part 20 rises, and the holding part 30 rotates backward about 90 ° with respect to the lifting part 21 to bring the steel pipe pile P into a vertical state. When reaching a predetermined position, the rotation of the elevating screw part 12 is stopped and the ascent of the rotary burying part 20 is stopped. Then, the open / close levers 51 and 52 of the steady rest 50 are closed, and the respective gripping portions 53 and 54 grip the lower portion of the steel pipe pile P. It is desirable that the closed positions of the gripping portions 53 and 54 be lightly pressed on the outer peripheral surface of the steel pipe pile P or located at a position having a slight gap with the outer peripheral surface, and may be locked at that position. .
[0037]
Therefore, the steel pipe pile P can be inserted through the rotary burying portion 20 and the upper end portion can be set at a position higher than the burying device M (for example, around the ceiling portion of the building).
[0038]
And the steel pipe pile P hold | maintained at the rotation embedding part 20 is decelerated with the large gear 40 meshed with the small gear 39 by operating the drive motor 37, as shown in FIG. Is rotated on the axis and embedded in the ground by rotating the elevating screw portion 12 so as to move the rotary embedded portion 20 downward.
[0039]
As described above, the embedding device M causes the steel pipe pile P to be inserted into the insertion hole 43 of the chuck 42 in a horizontal state by rotating the holding part 30 when the rotary embedding part 20 is lowered to the lower part of the leader 10. If the steel pipe pile P is gradually raised in a vertical state by grasping and raising the center portion of the pile P, the upper end portion of the steel pipe pile P can reach a position above the rotary burying portion 20. Therefore, when constructing in a building, it is possible to use long steel pipe piles that are effectively extended almost 100% up to the height of the ceiling, and the trouble of welding and adding short steel pipe piles There is no need to perform such work. And the steel pipe pile P which stood up is embed | buried under the ground, rotating by transmitting via the reduction gear (large gear 40) from the drive motor 37. FIG.
[0040]
Moreover, since the rotary burying portion 20 can be held at an intermediate position of the steel pipe pile, the height of the leader can be shortened, and the apparatus itself can be configured compactly.
[0041]
Moreover, since the chuck | zipper 42 holding the steel pipe pile P is detachably arrange | positioned at the large gear 40 arrange | positioned in the hollow part 36 of the holding | maintenance rotation part 35, it replaces | exchanges for a predetermined chuck with the magnitude | size of the steel pipe pile P. Can do.
[0042]
Further, the elevating part 21 of the rotary burying part 20 is screwed into the elevating screw part 12 of the reader 10 and engaged with the elevating guide 16, so that the rotary burying part 20 is moved up and down while maintaining a state parallel to the vertical direction. Therefore, the steel pipe pile P can be stably raised from the horizontal state to the vertical state.
[0043]
Furthermore, the steel pipe pile P is held in the chuck 42 by opening the open / close lever 51 attached to the lower part of the leader 10 until the steel pipe pile P is inserted into the chuck 42 of the rotary embedding unit 20 from the horizontal state and started up. The steel pipe pile P can be started up smoothly, and if the open / close lever 51 is closed after the steel pipe pile P has started up in a vertical state, the steel pipe pile P can be prevented from swinging, and the embedding work is easy. Can be performed stably.
[Brief description of the drawings]
1 is an overall view showing an embedding device according to an embodiment of the present invention. FIG. 2 is a partial side cross-sectional view showing the main part of the embedding device of FIG. 1. FIG. 3 is a front view of the same portion. IV-IV cross-sectional view [FIG. 5] A view in the direction of arrow A in FIG. 2 [FIG. 6] Plan view showing the steady portion in FIG. 1 [FIG. 7] VII-VII cross-sectional view in FIG. Front view showing the state in which the steel pipe pile of the apparatus is not held. [Fig. 9] Front view showing the action of inserting the steel pipe pile horizontally into the holding rotating part. [Fig. 10] Standing the steel pipe pile held by the holding rotating part. Front view showing the action of raising [Fig. 11] Front view showing the state where the steel pipe pile has been raised [Explanation of symbols]
M ... Steel pipe pile rotary embedding device P ... Steel pipe pile 10 ... Leader 12 ... Lifting screw part 16 ... Lifting guide part 20 ... Rotary embedding part 21 ... Lifting part 24 ... Guide part 30 ... Holding part 31 ... Shaft part 35 ... Holding rotating part 36 ... Hollow part 37 ... Drive motor (rotation drive part)
39 ... Small gear (rotary drive)
40 ... Large gear (rotary drive)
42 ... chuck 43 ... insertion hole 50 ... steady rest parts 51, 52 ... open / close lever

Claims (2)

A steel pipe pile rotary burying apparatus having a rotary buried part that holds and rotates a steel pipe pile buried in the ground, and a leader that arranges the rotary buried part to be movable up and down,
The rotary burying unit has a lifting unit that is connected to the leader and moves up and down, and a holding unit that extends in a horizontal direction from a side end surface of the lifting unit,
The holding part is connected to the elevating part so as to be rotatable about a horizontal direction as an axis, and the holding part is formed with a hollow part through which the steel pipe pile is inserted,
In the hollow portion, a chuck portion for holding the steel pipe pile is disposed,
The chuck portion is connected to a rotation drive unit that rotates the steel pipe pile with respect to the axis of the steel pipe pile ,
The leader has a lifting screw made up of one screw member standing upright in the vertical direction, and a lifting guide made up of a pair of shafts standing up in parallel with the lifting screw, of the rotary embedded portion An elevating part is screwed to the elevating screw and is formed to be engageable with the elevating guide so as to be movable up and down with respect to the reader.
The lower part of the leader is provided with a pair of opening / closing levers pivotally attached to the elevating screw in order to hold the lower part of the steel pipe pile held on the rotary buried part from both sides. Steel pipe pile rotary burying equipment. The rotational drive unit includes a drive motor and a reduction gear that decelerates the rotation of the drive motor;
The steel pipe pile rotary embedding device according to claim 1, wherein the reduction gear is inserted into the hollow portion so as to be detachable from the chuck portion.

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