JP3078321U - Pile driver - Google Patents

Abstract

(57) [Abstract] [Problem] In pile driving work used for construction work,
In addition, the pile head is crushed or broken, or the pile is driven obliquely, so that the pile driving test is rejected, and there are problems such as generation of noise. SOLUTION: With a pile driving tool, an inner surface of a bowl-shaped concave body 1 into which a pile head can be fitted is covered with a hard rubber body 2, and a shank 3 processed in accordance with a chisel mounting shape is provided above the concave body 1. Then, the pile driving tool is detachably mounted on a hydraulic breaker and stake out.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to concrete piles (PC piles) used for construction works such as forest control, civil engineering, and construction, and pile driving tools used for driving wooden piles.

[0002]

[Prior art]

 In the construction work, pile driving was generally performed by hammering the head of the pile with a hammer by human power, etc., due to terrain restrictions such as slopes and the direction of driving. Also, a method has been proposed in which a hydraulic striking mechanism is attached to the tip of an arm by a hydraulic device or the like, and a hammer is mounted on the hydraulic striking mechanism to drive a pile (Japanese Utility Model Laid-Open No. 55-88442). Also, a method has been proposed in which a pile is pressed into the ground by applying vibration instead of hitting (JP-A-56-9524).

[0003]

[Problems to be solved by the invention]

 The method of driving a pile by hitting the pile head with human power or a hydraulic striking mechanism is as follows: In addition to rejection of pile driving inspection, there were problems such as loud noise at the time of driving. In addition, the method of press-fitting the pile into the ground by applying vibration (Japanese Patent Application Laid-Open No. 56-9524) can prevent noise generation and damage to the pile head, but the equipment becomes large and complicated, and it is difficult to use on slopes. There were problems such as difficulties in use, restrictions on topography, and the possibility of increased costs.

[0004]

[Means for Solving the Problems]

 The present inventor intends to provide the following means for solving the above-mentioned problems. (1) The inside of the bowl-shaped concave body is covered with a hard rubber body so that the pile head can be fitted into the hard rubber body, and a hydraulic breaker chisel is mounted above the bowl-shaped concave body. It is a pile driving tool characterized in that it can be detachably mounted on a hydraulic breaker by providing a shank processed according to the shape. (2) The pile driving tool according to the above (1), wherein the hard rubber body can be detachably attached to the bowl-shaped concave body. (3) A plurality of wart-shaped protrusions are provided on the outside of the hard rubber body, and holes are provided inside the bowl-shaped concave body so that the wart-shaped protrusions can be fitted and locked. The pile driving tool according to the preceding paragraph (1) or (2). (4) The pile driving tool according to the above (1) or (2), wherein the lower end of the hard rubber body is turned up to cover the lower end of the bowl-shaped concave body. .

[0005]

[Embodiment of the invention]

 FIG. 1 shows an embodiment of the present invention. The inside of a bowl-shaped concave body 1 is covered with a hard rubber body 2 made of urethane rubber or the like, and a pile head can be fitted into the hard rubber body 2. Above the bowl-shaped recess 1, there is provided a shank 3 machined according to the shape of the chisel so that it can be attached to a hydraulic breaker used with the chisel instead of the chisel.

As shown in FIG. 2, the hard rubber body 2 is provided with a plurality of wart-shaped protrusions 4 on the outside, and the wart-shaped protrusions 4 are fitted into the inner surface of the bowl-shaped concave body 1. Holes 9 and 9a are provided so that they can be locked. The hole 9 provided on the side surface of the bowl-shaped recess 1 penetrates the side surface of the bowl-shaped recess 1, but the hole 9a at the top of the recess of the bowl-shaped recess 1 is The projection 4 has a recessed shape into which the projection 4 can be fitted, and has a tapered hole so that the projection 4 can be locked. When the hard rubber body 2 is inserted into the bowl-shaped concave body 1, the warp-shaped projections 4 provided on the hard rubber body 2 fit into the holes 9 and 9 a provided in the bowl-shaped concave body 1 and are locked. Therefore, even if the hard rubber member 2 is slightly loosely fitted into the bowl-shaped concave member 1, the hard rubber member 2 does not easily fall off the concave member 1.

[0007] If the pile driving work is repeatedly performed, the hard rubber body 2 gradually deteriorates and breaks, and it becomes necessary to replace it. At this time, the hard rubber body 2 is pressed from the bowl-shaped recess 1 by pressing the warp-shaped projection 4 from the outside of the hole 9 provided on the side surface of the bowl-shaped recess 1. Can be easily removed.

FIG. 3 shows an embodiment in which the lower end of the hard rubber body 2 is turned up to wrap the lower end of the bowl-shaped concave body 1. A groove 8 is provided on the outer periphery of the bowl-shaped concave body 1 so that the tip of the turned up hard rubber body 2 fits into the groove 8 and is locked. It is designed not to fall off easily from the concave of the mold. When it becomes necessary to replace the hard rubber body 2, the tip of the hard rubber body 2 is removed from the groove 8, and the hard rubber body 2 is removed from the bowl-shaped recess 1 while the tip of the hard rubber body 2 is extended. Can be pulled out.

FIG. 4 is a perspective view showing an embodiment in which the pile driving tool of the present invention is mounted on a hydraulic breaker 5 mounted on an arm of a backhoe (civil engineering and construction machine). The shank 3 of the pile driving tool of the present invention is inserted and mounted on the hydraulic breaker 5 mounted on the tip of the arm 6 of the backhoe.

FIG. 5 is a cross-sectional view of an essential part showing an embodiment in which a pile driving operation is performed by a pile driving tool attached as shown in FIG. The head of the pile 7 is fitted into the hard rubber body 2 mounted inside the bowl-shaped concave body 1 and is driven so as to press down on the entire head of the pile 7, so that even if the pile driving tool vibrates up and down. The pile head and the hard rubber body 2 do not separate from each other, so that damage to the pile head, falling of the pile, and generation of noise can be prevented.

[0011]

[Effect of the invention]

 As described above, the pile driving tool of the present invention performs the pile driving operation with the pile head inserted into the hard rubber body 2 mounted on the inner surface of the bowl-shaped concave body 1, so that the entire circumference of the pile head is formed. The piles are uniformly pressed, and the piles do not fall over, and the pile driving is performed smoothly. In addition, since the pile driving work is performed in a state where the pile head and the hard rubber body 2 are in close contact with each other, it is possible to prevent the pile head from being crushed or damaged, and to prevent noise during the pile driving operation. Further, the pile driving tool of the present invention has an advantage that the structure is simple and can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of an essential part showing an embodiment of mounting hard rubber.

FIG. 3 is a sectional view of a main part showing another embodiment of mounting hard rubber.

FIG. 4 is a perspective view showing an embodiment mounted on a hydraulic breaker mounted on an arm of a backhoe.

FIG. 5 is a sectional view of a main part showing an example of pile driving.

[Explanation of symbols]

 Reference Signs List 1 bowl-shaped concave body 2 hard rubber body 3 shank 4 warped protrusion 5 hydraulic breaker 6 backhoe arm 7 pile 8 groove 9, 9a hole

Claims (4)

[Utility model registration claims] 1. The inside of a bowl-shaped concave body is covered with a hard rubber body so that a pile head can be inserted into the hard rubber body.
A pile driving tool characterized in that a shank processed according to the mounting shape of the hydraulic breaker chisel is provided above the bowl-shaped concave body so that the shank can be detachably mounted on the hydraulic breaker. 2. The pile driving tool according to claim 1, wherein the hard rubber body can be detachably attached to the bowl-shaped concave body. 3. A method in which a plurality of warp-shaped projections are provided on the outer side of the hard rubber body, and holes are provided on the inner side of the bowl-shaped recess so that the warp-shaped protrusions can be fitted and locked. The pile driving tool according to claim 1 or 2, wherein 4. The pile driving tool according to claim 1, wherein the lower end of the hard rubber body is turned up to cover the lower end of the bowl-shaped concave body.