JPH0218118Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to an operating tool for suspending and rotating a cylindrical ready-made concrete pile or a steel pipe foundation pile.

``Prior Art'' Conventionally, this type of foundation pile operating tool was developed by the applicant and patented No. 1078926 (Japanese Patent Publication No. 56-6451) titled ``Foundation Pile Chucking Cap.'' There is. This is a channel in which an axial guide groove for guiding a protruding piece protruding from the outer peripheral surface of the upper end of the foundation pile and a circumferential engagement groove for engaging during rotation and for hanging are connected to the side wall of the cap. Fit this chucking cap onto the upper end of the foundation pile, guide the protruding piece at the upper end of the foundation pile into the guide groove, and rotate the cap when the protruding piece reaches the upper end of the guide groove. The projecting piece is positioned in the engagement groove and used for hanging, or is used to lower and erect the pile by applying rotation.

``Problems that the invention aims to solve'' The goal is to make the chucking cap even more compact, making it easier to handle during work and transportation, and making it suitable for narrow work sites, especially when redeveloping buildings between buildings in cities. This is what we are trying to provide.

``Means for Solving the Problems'' The present invention provides a means for guiding an operating piece located on the inner circumferential side of the upper end of a cylindrical foundation pile into the side wall of a cylindrical body formed to be able to be fitted inside the upper end of a cylindrical foundation pile. An open axial guide groove and a circumferential engagement groove that engages when rotating and is used for suspension are provided in series.

``Example'' As shown in FIG. 1, an operating piece 2 is installed on the upper end surface of a foundation pile 1 of a cylindrical ready-made concrete pile or steel pipe. The operating pieces 2 do not need to be continuous over the entire length as shown in FIG. 1, but may be protruding toward the inner circumferential side of the upper end of the foundation pile 1, and the number thereof can be set freely.

As shown in FIGS. 2 and 3, an axial direction in which the operating piece 2 at the upper end of the foundation pile 1 is guided to the side wall of a cylindrical body 3 formed so as to be fitted inside the upper end of the foundation pile 1 is opened at the bottom. A circumferential engagement groove 5 that engages with the guide groove 4 during rotation and is used for suspension is provided in series. The number of guide grooves 4 and engagement grooves 5 is determined according to the number of operating pieces 2.

Further, a window hole 6 is provided in the side wall above the engagement groove 5 of the cylindrical body 3 in order to discharge muddy water, earth and sand, air, etc. from inside the foundation pile 1 when the foundation pile 1 is lowered into earth and sand. The window hole 6 is not limited to the side wall of the cylindrical body 3 and may be provided on the top wall as long as it is above the engagement groove 5. A screw 8 for connecting to the rotating member 7 is carved in the center of the upper wall of the cylindrical body 3. Further, as shown in FIG. 4, a protrusion 9 may be provided near the guide groove 4 of the engagement groove 5 to prevent the foundation pile 1 from falling when it is suspended.

"Function" This operating tool is connected to the rotating member 7, the foundation pile 1 is erected and entered into the upper end thereof, the operating piece 2 is guided in the guide groove 4, and the operating piece 2 is moved above the guide groove 4. After being positioned and rotated into the engagement groove 5, the foundation pile 1 can thereby be suspended and rotated. When the operating tool is rotated, the operating piece 2 comes into contact with the side of the engagement groove 5, the rotational force from the rotating member 7 is transmitted, and the operating tool is lowered into the excavated hole. When removing the operating tool from the erected foundation pile 1, rotate the operating tool in the opposite direction, position the operating piece 2 at the top of the guide groove 4, and then lift the operating tool upward to remove it. can be done. Incidentally, the excavated hole may be excavated using either stirring equipment or an auger rod.

"Effect of the invention" As described above, the present invention guides the operating piece located on the inner circumferential side of the upper end of the foundation pile to the side wall of the cylindrical body formed so that it can be fitted inside the upper end of the cylindrical foundation pile. This is a foundation pile operating tool that has an axial guide groove that is open at the bottom and a circumferential engagement groove that engages when rotating and is used for suspension, and can be fitted inside the upper end of the foundation pile. As it is shaped like this, the operating tools of the foundation pile are made as small as possible, making it easy to handle during work and transportation, and making it a chucking cap suitable for narrow work sites, especially when developing between buildings in cities. It becomes possible to provide Note that when the operating piece at the upper end of the foundation pile is constructed as a single piece, not only is the installation work easier, but the strength of the operating piece is also increased compared to a cantilevered type.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a foundation pile suspended and rotated by the operating tool of the present invention, Fig. 2 is a perspective view of an embodiment of the invention, and Fig. 3 is a perspective view of the operating tool of the present invention attached to the foundation pile. FIG. 4 is a front view of another embodiment of the present invention. 1...Foundation pile, 3...Cylindrical body, 2...Operation piece,
4... Guide groove, 5... Engagement groove.

Claims (1)

[Scope of utility model registration request] The side wall of the cylindrical body, which is formed so that it can be fitted inside the upper end of the cylindrical foundation pile, has an axial guide groove with an opening at the bottom that guides the operating piece located on the inner circumferential side of the upper end of the foundation pile, and which engages when rotating. A foundation pile operating tool characterized by having circumferential engagement grooves for engagement and hanging in series.