JP2007031976A - Hydraulic drawing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hydraulic drawing apparatus which carries out pile drawing work even in a small work space. <P>SOLUTION: The hydraulic drawing apparatus functions to draw a pile 10 having a band-shaped web 10a and flange portions 10b, 10c on both sides of the same, from the ground. According to the structure of the hydraulic drawing apparatus, a base frame 11 is arranged on the ground surface to enclose the pile 10, and supports 12a to 12d are mounted on four corners of the same, followed by mounting a reaction frame 13 on the supports 12a to 12d. The reaction frame 13 has fastening jacks 28a, 28b arranged thereon, for fastening the pile 10 thereto, and the base frame 11 has drawing jacks 36a, 36b mounted thereon, for elevating the reaction frame 13 which is in such a state that the pile 10 is fastened to the reaction frame 13 by the fastening jacks 28a, 28b. Further each of the drawing jacks 36a, 36b has a universal head 38 at the tip thereof, which tilts according to tilting of the reaction frame 13. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hydraulic pulling device that pulls out and removes a pile made of H-shaped steel, I-shaped steel, steel sheet pile, or the like and embedded in the ground.

  In order to pull out piles made of H-shaped steel or steel sheet piles embedded in the ground, as a pulling device to be mounted on a crane truck, an attachment equipped with a multi-pulley type pile puller is attached to the crane truck. There are types that are designed to be installed. When pulling out a pile using this pulling device, an attachment is placed near the embedded pile, and the chuck winch wire rope is attached to the pile web with a multi pulley. The pull-out operation is performed by raising it.

  Further, as a drawing device to be mounted on a crane vehicle, there is a high-frequency vibration pile driver that is attached to a hook provided on a winch wire rope of a crane. This pile driving machine has an eccentric moment and a shaft that is driven to rotate by a motor, and the pulling operation is performed while applying vibration to the pile by the motor.

  On the other hand, there is a hydraulic press-fitting machine as a pile remover that is mounted on a civil engineering work vehicle such as a tractor. This type of pile remover moves the hydraulic chuck mounted on the work vehicle up and down by hydraulic pressure. Since no vibration is applied when the pile is pulled out, there is an advantage that no noise is generated during the work.

In addition, as a hydraulic pile remover, Patent Document 1 describes a depressor which is provided with a chuck for gripping a steel sheet pile and is arranged so as to straddle the steel sheet pile in order to pull out the steel sheet pile. In order to remove the earth and sand adhering to the steel sheet pile at times, a pressing plate is arranged on the ground surface.
JP-A-10-140569

  As described above, when the pulling device is mounted on a crane or civil engineering work vehicle, a large work space is provided around the pile so that a large crane vehicle or work vehicle approaches the pile to be removed. If there is an obstacle such as a building near the pile, the pile removal work cannot be performed, and there is a limit to the place where the removal work can be performed.

  Also, the type of pile remover that applies vibration to the pile during the pile removal work will transmit vibration and noise around the work place, so use it when there are houses and buildings around the pile. I could not.

  On the other hand, as described in Patent Document 1, a pile remover that is directly attached to a steel sheet pile without being mounted on a crane vehicle or a civil engineering work vehicle is wide around the steel sheet pile without generating noise. Although there is an advantage that the drawing work can be performed even if there is no space, in order to pull out the steel sheet pile embedded with inclination, the steel sheet pile is pulled out for a predetermined length, and then the drawing machine and the holding plate are moved horizontally. Therefore, it was not possible to carry out the drawing operation continuously.

  In addition, when the pressing plate is placed close to the surface of the steel sheet pile, if there are protrusions on the surface of the steel sheet pile, the protrusions will collide with the pressing plate during extraction, and the extraction operation must be interrupted for a long time. Therefore, if there is a sufficient space between the tip of the pressing plate and the surface of the steel sheet pile, earth and sand will adhere to the surface of the steel sheet pile that has been pulled out, and there is a problem that workability is poor.

  Then, an object of this invention is to provide the hydraulic puller apparatus which can perform the extraction operation | work of a pile, even if a wide space is not ensured around the pile to extract.

  Another object of the present invention is to provide a hydraulic pulling device that can continuously pull out a pile even if the embedded pile is inclined.

  Furthermore, the present invention is a hydraulic type that can reliably remove earth and sand from the surface of the pile by the pulling work of the pile, and can quickly resume the pulling work even if the protrusion is fixed on the surface of the pile. An object is to provide a drawing device.

  In order to solve the above-mentioned problem, the hydraulic pulling device of the present invention is a hydraulic type that pulls out a pile embedded in the ground having a belt-like main body portion and a flange portion integrally provided on the side of the main body portion. It is a drawing device, and is placed on a pedestal frame arranged on the ground surface so as to surround the pile, and a plurality of columns fixed to the pedestal frame, and presses the main body portion of the pile from both sides A reaction force frame provided with a fastening jack, and a pull-out jack that is attached to the gantry frame and raises the reaction force frame with the pile fastened to the reaction force frame by the fastening jack. And a universal head that tilts corresponding to the inclination of the ground surface with respect to the pile is provided at the tip of the extraction jack.

  In this way, it has a gantry frame to which the support column is fixed and a reaction force frame placed on it, and these are divided, and each is lightweight and compact, Even when a large space is not secured around the pile to be pulled out, it is possible to reliably perform the pile removing operation. In addition, a universal head is provided between each support column and the reaction force frame, and the reaction force frame can be tilted and moved with respect to the gantry frame, so that the pile can be pulled out smoothly even when the ground is inclined. It can be carried out.

  In a preferred embodiment of the present invention, two fastening jacks are provided on the reaction force frame so as to correspond to both sides of the main body portion of the pile, and a chucking member that contacts the main body portion of the pile at the tip of each fastening jack. It is characterized by providing. Thereby, it can clamp | tighten with a fastening jack from the both sides of a pile, and can fasten a pile to a reaction force flame | frame.

  In a preferred embodiment of the present invention, the first frame is attached to the gantry frame so as to be movable toward and away from one surface of the main body portion of the pile, and is movable toward and away from the other surface of the main body portion. A second slab is attached to the base frame, and urging means for urging the respective slabs in a direction toward the main body is attached to the gantry frame. As a result, when the pile is pulled out, the earth and sand adhering to the surface of the pile is removed from the pile by the earthenware. In addition, even if the ground is inclined, the dirt is moved against the urging force, so that the earth and sand can be surely removed from the pile.

  In a preferred embodiment of the present invention, the biasing means is constituted by a spring member. As a result, it is possible to apply a biasing force against the soil with a simple structure.

  In a preferred embodiment of the present invention, the pile is an H-shaped steel or an I-shaped steel integrally provided with flanges on both sides of the main body, and each of the ladles corresponds to the interval between the flanges on both sides. In this case, the frame is mounted on the gantry frame in a replaceable manner. In this way, by making the soil slabs exchangeable, it is possible to remove earth and sand from the piles of various sizes together with the extraction of the piles.

  According to the present invention, the following effects can be obtained.

  That is, according to the present invention, it is possible to reliably perform the pile removing operation even when a large space is not secured around the pile to be pulled out, and the reaction force frame can be inclined with respect to the gantry frame. Even if the is inclined, it is possible to smoothly pull out the pile.

  In addition, according to the present invention, when the pile is pulled out, the earth and sand adhering to the surface of the pile can be automatically removed from the pile by the soil slab, and the soil slab resists the urging force even if the ground is inclined. Therefore, it becomes possible to remove the earth and sand from the pile without fail.

  Furthermore, according to the present invention, it is possible to pull out various types and sizes of piles such as L-shaped steel in addition to H-shaped steel.

  Hereinafter, the best mode for carrying out the present invention will be described more specifically with reference to the drawings. In addition, the same code | symbol is attached | subjected to the member which has a common function in an accompanying drawing. The description here shows the best mode for carrying out the present invention, and the present invention is not limited to the embodiment.

  FIG. 1 is a perspective view showing the whole of a hydraulic pulling device according to the present invention. This pulling device is a surface of the ground so as to surround the pile 10 in order to pull out the pile 10 embedded in the ground by means such as press fitting. The frame has a substantially quadrilateral frame 11 and four columns 12a to 12d fixed to the four corners of the frame, and the reaction force frame 13 is placed on the columns 12a to 12d. It has become so. The pile 10 embedded in the ground is H-shaped steel, and as shown in FIG. 1, a strip-shaped web (main body portion) 10a and flange portions 10b, 10c integrally provided on both sides of the web 10a, The flange portions 10b and 10c are perpendicular to both surfaces of the web 10a.

  2 is a perspective view showing the pulling device in a state where the reaction force frame 13 shown in FIG. 1 is removed, and FIG. 3 is a perspective view showing the gantry frame 11 shown in FIGS. 4 is a plan view of the gantry frame 11, FIG. 5 is a front view of FIG. 1, FIG. 6 is a right side view of FIG. 5, and FIG. is there.

  As shown in FIG. 3, the gantry frame 11 has two support plates 14 a and 14 b that are parallel to the web 10 a of the pile 10 so as to surround the pile 10 when the extraction device is arranged on the ground surface. Spacers 15 are provided at both ends of each of the support plates 14a and 14b. Frame pieces 16a and 16b are fixed on the respective support plates 14a and 14b through spacers 15 in parallel to the support plates 14a and 14b. One end of each of the support plates 14a and 14b is provided with a spacer 15 at a right angle to each other. The frame piece 16c is fixed to the other end of each of the support plates 14a and 14b, and the frame piece 16d is fixed to the other end portion of the support plates 14a and 14b via the spacer 15 in parallel to the frame piece 16c. Each of the frame pieces 16a to 16d is formed of H-shaped steel, and the connecting plate 17 is welded to the inside of the two frame pieces 16a and 16b, and the other two frame pieces 16c and 16d are attached to both end faces. As shown in FIG. 5, the connecting plate 18 is welded, and the connecting plates 17, 18 are connected by bolts 19, and the lower surface of each frame piece 16 a, 16 b is connected to the support plates 14 a, 14 b via spacers 15. Is fixed by a bolt 19. Thus, the gantry frame 11 is a quadrilateral having a space at the center. In FIG. 3, the bolt 19 is omitted.

  As shown in FIG. 2, columns 12a and 12b are fixed to both ends of the frame piece 16a, columns 12c and 12d are fixed to both ends of the frame piece 16b, and the columns 12a to 12d are respectively attached to the gantry frame 11. It is attached to the four corners. Each of the columns 12a to 12d is formed by connecting a lower column piece 22 and an upper column piece 23 having different vertical dimensions. Each of the column pieces 22 and 23 is formed of an H-shaped steel having a connection plate 24 welded to both upper and lower end surfaces, and each column 12a to 12d is connected to the connection plate 24 of the lower column piece 22 by a bolt 19 and a frame piece 16a. , 16b to be fixed to the gantry frame 11. In addition, you may comprise not only the two support | pillar piece but connecting up and down to comprise a support | pillar. Alternatively, three or more strut pieces may be connected vertically.

  As shown in FIG. 1, the reaction force frame 13 placed on the columns 12a to 12d has two frame pieces 25a and 25b parallel to the frame pieces 16a and 16b, and both ends of the frame pieces 25a and 25b. It has two frame pieces 25c and 25d which are connected and parallel to each other. Each of the frame pieces 25a to 25d is formed of an H-shaped steel, and the two frame pieces 25a and 25b have a horizontal main body portion and one flange portion facing each other. On the other hand, the other two frame pieces 25c and 25d have the main body portion vertical and the flange portions on both sides are arranged above and below, and the other two frames at the portion of the connecting plate 26 welded to both end faces. The bolts 19 are fixed to the pieces 25a and 25b. As described above, the reaction force frame 13 is a quadrilateral having a space in the center as in the gantry frame 11. In FIG. 1, the bolt 19 is omitted.

  As described above, since the gantry frame 11, the columns 12a to 12d, and the reaction force frame 13 are all formed by combining a plurality of H-section steels, each H-section steel is transported to a construction site by a truck or the like in advance. It is possible to assemble a hydraulic drawing device at the construction site. Alternatively, the gantry frame 11 and the reaction force frame 13 may be assembled in advance and transported to a construction site by a truck or the like, and the columns 12a to 12d may be attached to the gantry frame 11 at the construction site. Note that the gantry frame, the support column, and the reaction force frame can be formed of various other steel materials such as a steel pipe, for example, instead of the H-shaped steel as in the present embodiment.

  As shown in FIG. 7, chuck support plates 27a and 27b are fixed inside the two frame pieces 25a and 25b of the reaction force frame 13, respectively. Fastening jacks 28a and 28b are attached to the chuck support plates 27a and 27b, respectively. Are attached so as to face each other, and the respective fastening jacks 28a, 28b have piston rods (not shown) that move forward and backward by hydraulic pressure. Chuck guides 29a and 29b are fixed to the chuck support plates 27a and 27b, and reciprocating members 31a and 31b that are reciprocated linearly by fastening jacks 28a and 28b are movably incorporated in the chuck guides 29a and 29b. It is.

  FIG. 8 is an exploded perspective view showing the chuck guides 29a and 29b and the reciprocating members 31a and 31b shown in FIG. 7 in an enlarged manner. Support plates 32a and 32b are provided on the front end surfaces of the reciprocating members 31a and 31b. Is supposed to be fixed. As shown in FIG. 7, chucking plates 33a and 33b that are in pressure contact with the web 10a of the pile 10 are attached to the support plates 32a and 32b as chucking members, respectively. Thus, when the respective fastening jacks 28a, 28b are operated, the fastening jacks 28a, 28b fasten the chucking plates 33a, 33b from both sides of the web 10a via the reciprocating members 31a, 31b, and the pile 10 reacts. It will be in the state fastened to the frame 13.

  As shown in FIG. 7, support bases 35a and 35b are respectively fixed inside the two frame pieces 16a and 16b constituting the gantry frame 11, and the reaction force frame 13 is moved up and down on the respective support bases 35a and 35b. Pull-out jacks 36a and 36b are attached for this purpose. Each of the extraction jacks 36 a and 36 b has a piston rod 37 that moves forward and backward by hydraulic pressure, and a universal head 38 is disposed at the tip of the piston rod 37. The universal head 38 has a spherical convex surface 39 that comes into contact with a spherical concave surface provided at the tip of the piston rod 37, and can be tilted in any direction.

  As shown in FIGS. 1 and 6, when the reaction force frame 13 placed on the columns 12 a to 12 d is moved upward by the pull-out jacks 36 a and 36 b, the guide member 40 that contacts the outside of the columns 12 a to 12 d is as shown in FIGS. 1 and 6. It is attached to the lower surface of the reaction force frame 13. When the reaction force frame 13 is moved downward, the reaction force frame 13 is moved downward while being guided by the support members 12a to 12d by the guide member 40, and the reaction force frame 13 is guided by the guide member 40 and supported by the support members. It moves up and down above 12a-12d.

  FIG. 9 is a plan view showing the support plates 14 a and 14 b of the gantry frame 11. Between the spacers 15 fixed to both ends of the respective support plates 14 a and 14 b, earth layers 41 a and 41 b are respectively attached to the pile 10. It is mounted to move toward and away from the web 10a. One soil ladle 41a serves as a first soil ladle that moves toward one surface of the web 10a, and the other soil ladle 41b serves as a second soil ladle that moves toward the other surface of the web 10a. In addition, the width dimension of each of the slabs 41a and 41b is set to be smaller than the distance between the spacers 15, and the slats 41a and 41b are also movable in the width direction.

  As shown in FIG. 3, the two guide rods 42 fixed to the frame piece 16a are provided with guides that abut against the soil ladle 41a in order to urge the soil ladle 41a toward the web 10a. A plate 43 is movably attached, male screws 46 to which nuts 44 are screwed are formed on the respective guide rods 42, and a spring member 45 made of a compression coil spring is provided between the nuts 44 and the guide plate 43. Is installed. Similarly, in order to bias the spring force in the direction toward the web 10a against the soil plate 41b, the guide plate 43 contacting the soil plate 41b moves to the two guide rods 42 fixed to the frame piece 16b. Male screws 46, which are freely attached and screw-coupled to the nuts 44, are formed on the respective guide rods 42, and between the nuts 44 and the guide plates 43, spring members 45 made of compression coil springs are mounted. Yes. Each of the clay bars 41a and 41b is detachably mounted on the gantry frame 11 so that various sizes can be exchanged according to the size of the pile 10 to be pulled out.

  Next, the pile drawing-out procedure using the above-described hydraulic drawing device will be described. First, as shown in FIG. 2, the gantry frame 11 is arranged on the upper surface of the ground so as to surround the periphery of the pile 10 to be pulled out. When the gantry frame 11 is arranged on the upper surface of the ground, the respective slats 41a and 41b are moved backward against the spring force so that the tips of the slats 41a and 41b and the web 10a of the pile 10 do not interfere with each other. Like that. The pile 10 on which the drawing operation is performed is preliminarily performed in advance so that the protruding length from the ground at the upper end thereof is a predetermined length. In the case shown in FIG. 2, the gantry frame 11 with the columns 12 a to 12 d and the pull-out jacks 36 a and 36 b attached in advance is arranged on the ground, but after the gantry frame 11 is arranged, You may make it attach to 12a-12d, the extraction jacks 36a and 36b, and the mount frame 11. FIG.

  Next, the reaction force frame 13 is placed on the pillars 12a to 12d using a crane or the like, and the reaction force frame 13 is placed as shown in FIG. In this state, the respective fastening jacks 28a and 28b are driven, the chucking plates 33a and 33b are moved forward, and the web 10a of the pile 10 is fastened from both sides via the chucking plates 33a and 33b. After pressing by 28a and 28b, the pull-out jacks 36a and 36b are driven to move the reaction force frame 13 upward. As a result, the pile 10 is pulled out by the ascending stroke of the piston rod 37 of the pull-out jacks 36a, 36b. At the time of this pull-out movement, since the slabs 41a and 41b are pressed toward both surfaces of the web 10a of the pile 10, the earth and sand adhering to the pile 10 when the stake 10 is pulled out from the surface of the pile 10 by the slabs 41a and 41b. Removed.

  In this way, after moving up by a predetermined stroke, the fastening jacks 28a, 28b are moved backward to move the chucking plates 33a, 33b backward, and the extraction jacks 36a, 36b are moved backward to move the reaction force frame 13. Move down. Under this state, as described above, after pressing both surfaces of the web 10a of the pile 10 with the fastening jacks 28a and 28b, the reaction force frame 13 is moved up by the pull-out jacks 36a and 36b, and the pile 10 is further moved to a predetermined state. Pulling out only the stroke, the earth and sand adhering to the pile 10 are removed by the soil lavers 41a and 41b. Thus, the pile 10 is pulled out from the ground by performing the pulling-out operation a predetermined number of times by the upward movement of the reaction force frame 13.

  10 shows a state in which the ground surface is inclined with respect to the pile 10 rather than a horizontal plane indicated by a broken line so that the surface of the web 10a of the pile 10 is inclined with respect to the ground surface, and FIG. The state which the ground surface inclines with respect to the pile 10 rather than the horizontal surface shown with a broken line so that the surface of the part 10b, 10c may incline with respect to the ground surface is shown.

  As shown in FIG. 10 and FIG. 11, when the ground surface is inclined with respect to the pile 10, the reaction jack 13 is pressed against the pile 10 by the fastening jacks 28 a and 28 b pressing the pile 10. The reaction force frame 13 is not parallel to the gantry frame 11 because it is a right angle, but the universal head 38 provided at the tip of the pull-out jacks 36a, 36b is inclined and moved according to the inclination of the reaction force frame 13 with respect to the gantry frame 11. Therefore, the two pull-out jacks 36a and 36b can reliably lift the reaction force frame 13 and pull out the pile 10. Since the upper surface of the universal head 38 is in contact with the lower surface of the reaction force frame 13 and the reaction force frame 13 can slide with respect to the universal head 38, the reaction force frame 13 is removed when the inclined pile 10 is pulled out. Even if the frame moves in the horizontal direction with respect to the gantry frame 11, the pulling-out operation can be performed reliably. In addition, even if the pile 10 inclines in both directions shown in FIG. 9 and FIG.

  Furthermore, as shown in FIGS. 10 and 11, when the ground surface is inclined with respect to the pile 10, the relative position between the pile 10 and the gantry frame 11 changes with the progress of the drawing work. At that time, since the slats 41a and 41b are movable in the advancing / retreating movement direction and the width direction with respect to the gantry frame 11, the slats 41a and 41b are moved in accordance with the relative positions of the pile 10 and the gantry frame 11, and Since the springs 41a and 41b are applied with spring force, the earth and sand adhering to both surfaces of the pile 10 can be surely removed. When a protrusion is attached to the pile 10 and the protrusion interferes with the slabs 41a and 41b, the interference is easily canceled by moving the slabs 41a and 41b backward against the spring force. be able to.

  In the case shown in the figure, the pile 10 is formed of H-shaped steel, but is not limited to H-shaped steel, and it is not limited to H-shaped steel, but like a I-shaped steel, an L-shaped steel, and a steel sheet pile. The present invention can be applied to a drawing operation of a pile having a flange portion integrally provided on the side. In the illustrated case, the reaction force frame 13 is provided with two fastening jacks 28a and 28b. However, the pile 10 may be fastened to the reaction force frame 13 from both sides by one fastening jack.

  The present invention can be applied to pull out and remove a pile made of H-shaped steel or the like embedded in the ground.

It is a perspective view showing the whole hydraulic pulling device of the present invention. It is a perspective view which shows the extraction apparatus in the state which removed the reaction force flame | frame shown by FIG. It is a perspective view which shows the mount frame shown by FIG. 1 and FIG. It is a top view of a mount frame. It is a front view of FIG. FIG. 6 is a right side view of FIG. 5. It is an arrow view of the AA line direction in FIG. FIG. 8 is an exploded perspective view showing the chuck guide and the reciprocating member shown in FIG. 7 in an enlarged manner. It is a top view which shows the support plate of a mount frame. It is a front view which shows the hydraulic extraction apparatus arrange | positioned on the ground surface inclined with respect to the pile rather than the horizontal surface shown to a broken line. It is a side view which shows the hydraulic extraction apparatus arrange | positioned on the ground surface inclined with respect to the pile rather than the horizontal surface shown to a broken line.

Explanation of symbols

10 Pile 10a Web (main part)
10b, 10c Flange 11 Mounting frame 12a-12d Post 13 Reaction force frame 14a, 14b Support plate 15 Spacer 16a-16d Frame piece 22, 23 Post piece 25a-25d Frame piece 28a, 28b Fastening jack 33a, 33b Chucking plate ( Chucking material)
36a, 36b Pull-out jack 38 Universal head 41a, 41b Soil 42 Guide rod 43 Guide plate 44 Nut 45 Spring member

Claims (5)

A hydraulic pulling device that pulls out a pile embedded in the ground having a strip-shaped main body and a flange provided integrally on the side of the main body,
A gantry frame arranged on the ground surface so as to surround the pile,
A reaction force frame mounted on a plurality of columns fixed to the gantry frame and provided with a fastening jack for pressing the main body portion of the pile from both sides;
A pull-out jack that is attached to the gantry frame and raises the reaction force frame under a state where the pile is fastened to the reaction force frame by the fastening jack;
A hydraulic drawing device, wherein a universal head that tilts in accordance with the inclination of the ground surface with respect to the pile is provided at the tip of the drawing jack.   Two fastening jacks are provided on the reaction force frame so as to correspond to both sides of the main body portion of the pile, and a chucking member that contacts the main body portion of the pile is provided at the tip of each fastening jack. The hydraulic drawing device according to claim 1.   A first slab is attached to the gantry frame so as to be movable toward and away from the one surface of the main body of the pile, and a second slab is movable toward and away from the other surface of the main body. The hydraulic pulling device according to claim 1 or 2, wherein an urging means is attached to the pedestal frame for urging a pressing force in a direction toward the main body portion to each of the dams.   4. The hydraulic extraction device according to claim 3, wherein the biasing means is constituted by a spring member. The pile is an H-shaped steel or an I-shaped steel provided with flanges integrally on both sides of the main body, and the cradle is exchangeable in accordance with the distance between the flanges on both sides. The hydraulic pulling device according to claim 3 or 4, wherein the hydraulic pulling device is attached to a frame.

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