JP5561627B2 - Pile driver - Google Patents

Description

  The present invention is an invention related to a pile driving device for driving a pile for increasing a supporting force and reducing ground subsidence when building a house or the like on soft ground.

  As a ground improvement method for soft ground in residential areas and the like, a basic ground reinforcement method called a so-called RES-P method (Reinforced Earth with Steel Pipe) is known. This method is a type of piled raft foundation method, and several tens to several hundreds of piles (metal pipes) made of small-diameter steel pipes are penetrated into weak ground to form a composite of ground and piles. By acting, the strength of the ground is strengthened and the settlement of the ground is reduced.

  The RES-P construction machine MSP-800 normally measures penetration with the pressure input of the chain feed and the rotational force of the drifter, and when it becomes difficult, switches the pressure input and the drifter of the chain feed from rotation to blow to measure penetration. If becomes smaller, the drifter is returned to rotation and penetration is advanced. This is because the pile is bent and the impact energy is accompanied by noise. Moreover, the conductivity of the hitting energy requested from the shape mass of the pile was poor, and the depth of 7 m was the limit of the construction machine. Also, the pressure input, which is a measure of the support force, is about 910 kg at the maximum condition because the mass of the main body of the pile driving machine is about 910 kg, and if the ground surface layer is hard, the pile will bend, so only about 360 kg can be applied. could not.

  Then, this inventor proposed the new pile driving device as shown to the following patent documents 1, and has already obtained the patent. This pile driving device is a device that applies a slight modification to a load-type hydraulic crane vehicle, attaches a steel structure pile driving machine without a power source as an attachment, and presses the pile with the lifting force of the crane hook .

Japanese Patent No. 3965653

  In the pile driving device shown in Patent Document 1, when a force that greatly exceeds the weight of the pile driving machine is applied to the pile to be driven, the boom warps and the pile driving machine floats up, and further operation cannot be performed. In other words, since it was impossible to apply a large pressure input to the pile to be driven, if the surface layer was hard, reliable pile driving could not be performed. There were many cases where piles were bent when the surface ground was hard. That is, only pile driving with low bearing capacity was possible, and the pile was bent, and so on.

  Therefore, the present invention has been devised to solve these problems, and its main purpose is to pile a pile (metal pipe) into the ground with high pressure input to ensure a high bearing capacity. A new pile driving device capable of hammering is provided.

  In order to solve the above-mentioned problems, the first invention is a modification in which a remote control device and a rear outrigger are mounted on a load-type hydraulic crane vehicle, a connecting bracket is attached to the tip of the boom, and a connection and transportation platform is attached to the rearmost part of the loading platform. The pile driving device is characterized in that a pile driving machine having a fitting attached to the coupling fitting at the head is connected as an attachment, and the pile is driven by a force of lifting a crane hook. In other words, a general load-type hydraulic crane vehicle has an outrigger that projects laterally between the driver's seat and the loading platform, but this acts as a fulcrum for lifting an object, but as a fulcrum for pressing the pile driver. Does not work. For this reason, in the present invention, the rear outrigger is attached to the load-type hydraulic crane vehicle, and this is used as a fulcrum for pressing an object, thereby strongly pressing the pile driving machine.

  According to a second invention, in the first invention, the pile driver includes a pile-pillar body made of a prismatic steel pipe, a weight suspended in the pile driver body, and a front surface of the pile driver body. A plate that is not bent, an operating part that moves up and down along the main body of the pile driving machine with the force of hoisting the weight and the crane hook, and press-fitting the pile, and is opened on the pile pressing surface of the operating part A hand-wound winch that winds a pile fixed by attaching a pile fixing bracket to the wire passed through the hole and fixes the head of the pile to the pile pushing surface, and the pile pushing surface of the working part is the pile driving machine Pile characterized in that the hand-wound winch is capable of forcibly rewinding the wound wire by adjusting the braking force of the built-in mechanical brake. It is a hammering device.

  The pile driving device according to the present invention secures a fulcrum for pressing an object with a boom connected to the loadable hydraulic crane vehicle by providing a rear outrigger, and loads a weight of about 1 ton close to the crane post during work. By limiting the range to a predetermined range in front of the vehicle, the pile driver is pressed down by the loaded weight and the weight of the vehicle, and all the force to wind up the crane hook acts as a reverse of the force that operates as a pressure input. In other words, maintaining the pressure input several times higher than that of the conventional machine by using the weight of the loader and the weight of the vehicle, which was supported only by the weight of the conventional pile driver, as the backing of the pressure input. Can do. In the pile driving device of the present invention, it is the first device released from the small pressure input to the pile driving machine that relies on a crane car for the main machine such as MSP-800. It works to hold down things that were not required for the crane function.

It is a general view which shows the state which is carrying the pile driving machine 10 which comprises the pile driving apparatus 100 which concerns on this invention with the loading type | mold hydraulic crane vehicle 20. FIG. 1 is an overall view showing an embodiment of a pile driving machine 10 constituting a pile driving apparatus 100 according to the present invention. It is the elements on larger scale which show the top vicinity of the pile driving machine. It is the elements on larger scale which show the A section in FIG. It is explanatory drawing which shows the structure and effect | action of a pile fixing metal fitting. It is a conceptual diagram which shows the state which unloads the pile driving machine 10 from the loading platform of a truck with the crane apparatus 30. FIG. It is a conceptual diagram which shows the state which connected the pile driving machine 10 to the crane apparatus 30. FIG. It is a conceptual diagram which shows the state which made the connection member 35 of the crane apparatus 30 approach the connection member 11c of the pile driving machine 10. FIG. It is a conceptual diagram which shows the state which connected the pile driving machine 10 to the crane apparatus 30. FIG. It is a conceptual diagram which shows the state which lifted the crane apparatus 30 which connected the pile driving machine. It is a conceptual diagram which shows the state which the pile driving machine 10 was grounded ahead of the crane vehicle 20. FIG. It is a conceptual diagram which shows the state which fixed the pile P with the pile fixing metal fitting 50, and is lifting. It is a conceptual diagram which shows the state which attached the pile P to the pile driving machine 10. FIG. It is a conceptual diagram which shows the state which lowered the crane hook 33 and was engaged with the handle hardware 15 of the pile driving machine 10. FIG. It is a conceptual diagram which shows the state which raises the crane hook 33 engaged with the handle metal fitting 15, and press-fits the pile P in the ground. It is a conceptual diagram which shows the state which raised the crane hook 33 engaged with the handle metal fitting 15 further, and press-fitted almost the whole pile P in the ground.

  Next, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an overall view showing an embodiment of a pile driving device 100 according to the present invention. As shown in the figure, the pile driving device 100 includes a pile driving machine 10 and a load-type hydraulic crane 20. The load-type hydraulic crane 20 has a configuration including a crane device 30 between a truck cab and a loading platform, and one pile driving machine 10 is transported while being loaded on the loading platform of the truck. It has become so.

  A front outrigger 24 and a rear outrigger 25 are provided on the front and rear of the loading platform of the load-type hydraulic crane 20. A weight of about 1 ton is loaded near the crane post of the crane device 30. At the rear part of the loading platform, a connection platform 26 and a transportation platform 27 are provided.

  As shown in FIG. 1, the pile driving machine 10 has a length of 6.5 to 7.5 m. This is because it is made with attention to driving 5m or 6m piles. This is because a 5-6 m pile can be driven in consideration of the fact that a longer length will cause problems in terms of transportation and connection, and a shorter length will result in poor efficiency, and a pile may be connected and driven as necessary.

  FIG. 2 shows one embodiment of the pile driving machine 10, wherein FIG. 2A is a right side view thereof, FIG. 2B is a front view thereof, and FIG. 2C is a rear view thereof. The figure and the figure (C) are the left views. As shown in the figure, the pile driving machine 10 has a structure in which an operating unit 12 is slidably mounted along a columnar pile driving machine main body 11.

  The pile driving machine main body 11 is configured as an internal hollow column made of a solid square steel pipe, and its head is firmly fixed by eight 16 mm high tension bolts and a thick iron plate. A connecting member 11c is provided at the head of the pile driving machine main body 11, and the connecting member 11c is connected to a crane boom tip fitting as described later.

  The bottom portion of the pile driving machine main body 11 is formed to have a size of about 8 to 10 times the cross-sectional area of the pile driving machine main body 11, and the support base 14 and the handle hardware 15 that support the manually wound winch 13 are placed thereon. A mounting table and the like are provided integrally. In addition, a protective plate 11d is provided on one side of the bottom of the pile driving machine main body 11 so as to be substantially parallel to the pile driving machine main body 11. The pile driving machine main body 11 and various members attached thereto are protected.

  The operation part 12 functions to move up and down with the pile driving machine main body 11 as a guide and press fit. This operation part 12 has a pile pushing surface 12e for press-fitting the above-mentioned pile, a wire W1 connected to the handle hardware 15 is attached to both sides, a wire W2 connected to the weight 18 in the main body and a guide wire W3 for the operation height. The pile pushing surface 12e has an angle of 87 degrees with respect to the pile driving machine main body 11, and has a hole through which the wire W4 with the pile fixing metal fitting 50 for fixing the pile P is passed.

  The wire W1 fixed to both sides of the operating unit 12 connects the left and right pulleys 17 and 17 provided in the lower part of the pile driving machine main body 11 through the handle 15 on the back side of the pile driving machine main body 11. Yes. The handle 15 is hung on the crane hook 33, and the operation part 12 is pulled down by winding it up, and the pile pushing surface 12e of the operation part 12 has an angle so that a large force is applied and the pile P is slightly piled. It is designed to be pressed into the ground by preventing the bending piles P from being bent by the plates 19 and 19 which are bent toward the machine body 11 and not bent.

  A wire W2 connected to the weight 18 in the pile driver main body 11 is connected to a weight 18 suspended inside via a pulley 11f on the head of the pile driver main body 11. The weight 18 has a weight more than three times that of the actuating part 12, and the weight 18 always works to lift the actuating part 12 upward, and the wire W 1 attached to the handle metal 15 is always tensioned to move the actuating part 12. Is smooth.

  As shown in FIGS. 3 and 4, the pile pushing surface 12 e of the working unit 12 protrudes about 20 cm from the lower end of the working unit 12, forms an angle of 87 degrees with respect to the pile driving machine body 11, and fixes the pile P to the pile. When fixed by the metal fitting 50, as shown in FIG. 5, the plates 19, 19 which are slightly bent to the pile driving machine main body 11 side with a large diameter (80φ) of the holder 50 and are not bent are attached to the pile driving machine main body 11. It is designed to measure the press-fitting into the ground while preventing the bending. As shown in FIG. 4 (A), the pile pressing surface 12e has a hole 12f at a position about 10 cm away from the pile driving machine main body 11, and a wire with a pile fixing bracket 50 for fixing the pile P. W4 is passed.

  Moreover, as shown in FIG. 4 (B), the pair of non-bent plates 19 and 19 provided in the pile driving machine main body 11 are each composed of a long flat steel, The pile driver main body 11 is welded in parallel to the front surface at the same interval.

  Further, as shown in FIGS. 2B and 2C, both ends of the reference wire W <b> 3 are fixed to the right side surface of the operating portion 12. This guide wire W3 is looped up and down between the upper pulley 11g provided on the head side of the pile driving machine main body 11 and the lower pulley 11h provided on the bottom side of the pile driving machine main body 11. It is provided as follows. The guide wire W3 is circulated between the upper pulley 11g and the lower pulley 11h along with the movement (up and down movement) of the operation section 12, so that the operation section 12 can be guided to control the movement. Yes.

  Since the built-in mechanical brake is largely adjusted and the half-brake state is set in the manually wound winch 13, when the pile P is driven by the operating portion 12, the brake W slips and the wire W4 wound up is forcibly wound. It is supposed to be returned.

  As shown in FIG. 5, the pile fixing metal fitting 50, after putting the metal fitting 51 having a tapered upper end into the pile P and then fitting the pile fixing metal fitting 50 into the upper end of the pile P, pulls the metal fitting 51 vigorously. In this way, the upper end of the pile P is fixed.

  Next, the operation of the pile driving device 100 according to the present invention having such a configuration will be described. First, as shown in FIG. 6, the crane device 30 is operated to move the pile driving machine 10 mounted on the loading platform of the load-type hydraulic crane 20 so as to lean against the connection platform 26 installed behind the loading platform. Next, as shown in FIG. 7, the pile driving machine 10 is connected to the tip of the crane boom 32 of the crane device 30. When these connections are made, as shown in FIG. 8, the tip of the crane boom 32 is positioned so as to abut against the head of the pile driving machine 10, and then a pair of connecting members 35 provided at the tip of the crane boom 32. , 35 (only one of them is shown in the figure) is aligned so as to sandwich the connecting member 11c provided on the head of the crane device 30 from both sides.

  As shown in FIG. 8, holes 35a, 35a (only one is shown in the figure) and 11j are formed in the connecting members 35, 35 on the crane boom 32 side and the connecting member 11c of the pile driving machine 10, respectively. The holes 35a and 35a of the connecting member 35 on the crane boom 32 side are positioned at both ends so as to sandwich the cylindrical hole 11j provided on the connecting member 11c side of the pile driving machine 10, and the cores are aligned. Note that a guide (not shown) is provided on the connecting member 35 side on the crane boom 32 side, and the connecting members 35 and 35 on the crane boom 32 side are pressed against the connecting member 11c side of the pile driving machine 10 from above. Centering is easily performed by a fitting that matches the outer diameter of the connecting member 11c.

  Then, when the centering of the connecting members 35 and 35 on the crane boom 32 side and the connecting member 11c of the pile driving machine 10 is performed, the connecting pins 37 are provided in the holes 35a, 11j and 35a, respectively, as shown in FIG. Make sure that the plug cannot be removed. As a result, the pile driving machine 10 can be swingably connected (pin-coupled) to the tip of the crane boom 32.

  Next, when the pile driving machine 10 is connected (pin coupled) to the tip of the crane boom 32, the crane boom 32 of the crane apparatus 30 is extended and lifted and swung upward as shown in FIGS. The pile driving machine 10 is moved to the work range in front of the truck which is the pile driving position (for example, a range of 3.5 m × 3.5 m in front of the vehicle) and its lower end is grounded to the ground, and the pile driving machine main body 11 is made to stand vertically. In such a state, since the upper end is supported by the crane boom 32 of the crane apparatus 30, the stable state is maintained. The series of operations and the following operations are performed by the operator using a remote control device (not shown).

  If it will be in such a state, as shown in FIG. 12, after an operator attaches the pile fixing metal fitting 50 provided at the front-end | tip of the wire W4 of the manual winding winch 13 to the upper end of the pile P, the manual winding winch 13 Wind up the wire W4. Then, as shown in the drawing, the one end of the pile P is lifted, and the upper end of the pile P is positioned on the pile pressing surface 12d of the operating portion 12 via the pile fixing bracket 50 as shown in FIGS. As shown in FIG. 13, it is suspended in a vertical state.

  Then, with this state maintained, as shown in FIG. 14A, the crane hook 33 is lowered from the tip of the crane boom 32, and as shown in FIG. 14B, the operator attaches the crane hook 33 to the wire W1. Hook on the handle hardware 15. Thereafter, when the crane hook 33 is raised by operating the remote control device, as shown in FIGS. 15 and 16, as the wire W1 is pulled, the operating portion 12 descends and hits the pile pushing surface 12d. Push down the contacted pile P.

  As described above, the pile driving apparatus 100 according to the present invention secures a fulcrum for pressing an object with a boom connected to the load-type hydraulic crane vehicle 20 by providing the rear outrigger 25, and further, a weight of about 1 ton is applied to the crane post during work. Loading up close, limiting the working range to a predetermined range in front of the vehicle, pressing the pile driver with the loaded weight and the weight of the vehicle, and turning the crane hook 33 all up as a force to act as a pressure input Make it work. In other words, the weight of the loader and the weight of the vehicle, which was only supported by the weight of the conventional pile driver, can also be used as a backing for the pressure input to obtain a pressure input several times higher than that of the conventional machine. Can do.

  Further, the pile driving device 100 according to the present invention is provided with the pile driving machine main body 11 provided with plates 19 and 19 that prevent the bending by restricting the metal pipe P that becomes the pile to prevent the bending, The surface 12e is inclined about 1/20 so as to incline outward, and the diameter of the pile fixing bracket 50 is used to prevent the pinching by the plates 19 and 19 which are slightly bent with this gradient and do not bend the tip. be able to. As a result, the pile P will not bend even when the ground is hard.

DESCRIPTION OF SYMBOLS 100 ... Pile driver 10 ... Pile driver 11 ... Pile driver main body 11c ... Connection metal fitting 12 ... Actuation part 12e ... Pile pushing surface 13 ... Manual winding winch 15. ..Hand handle 18 ... weight 19 ... non-bending plate 20 ... loading hydraulic crane 24 ... front outrigger 25 ... rear outrigger 26 ... connection stand 27 ... Carriage 30 ... Crane device 35 ... Connecting bracket 37 ... Connecting pin 50 ... Pile fixing bracket P ... Pile (metal pipe)
W1, W2, W3, W4 ... Wire

Claims (3)

  A vehicle equipped with a connecting bracket at the tip of the boom of a load-carrying crane, a rear outrigger at the rear of the rear wheel, a connection platform required for connection to the loading platform used for transportation, and a device that can operate the crane with a remote control. It consists of a pile driving machine that presses the pile into the ground with the force of hoisting it by the crane hook of the vehicle, and the pile driving machine operates as a pile driving device by connecting the head to a connecting bracket attached to the tip of the crane boom. A hollow hollow steel pipe main body, and an operating portion that is provided so as to wrap the main body and moves up and down with the surface of the main body as a guide, and press-fits the pile, A pile pushing surface that fixes the pile head toward the top, and is connected to a weight suspended inside the main body so that an ascending force always works. Through a pulley provided on both sides of the foot of the main body, a handle metal is passed through the back of the main body, and the pile driving machine connected to the connecting fitting at the tip of the boom is installed at a designated place, A pile in which a crane hook is hung on the handle hardware and the hook is wound up until the operating part descends, thereby pressing the pile with the head fixed to the pile pushing surface of the operating part into the ground. Hammering device.   The pile driving device according to claim 1, wherein it is sufficient to incline the pile pushing surface of the operating part that abuts against the pile fixing bracket installed on the pile head about 3 degrees upward toward the main body side. Since it is the same as the gradient, if a large force is applied when the pile is press-fitted, the pile will be prevented from bending more than 1.5 m from the deflection head and hitting the main body. In addition, there is a non-bending plate installed on the front of the main body so as to be sandwiched according to the diameter of the pile, so that bending to the left and right is prevented and the pile will not bend no matter how many times the force is applied Pile driving device characterized by.   3. The pile driving device according to claim 1 and 2, wherein an object is pressed by a crane boom connected by attaching the rear outrigger to the load-type hydraulic crane and limiting a working range to a certain range in front of the vehicle. A pile driving device that can apply a high pressure input more than 4 times the weight of the pile driver by loading weights that create a fulcrum and enhance the effect.

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