JP3691886B2 - Pile connection hardware - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connection hardware for a pile, and relates to a connection hardware for a pile that joins the upper and lower piles of a concrete pile or steel pipe pile with a diameter of 250 to 2000 mm without welding.
[0002]
[Prior art]
In order to join the upper and lower piles of concrete piles or steel pipe piles without welding, as shown in FIG. 4, flanges 5 a and 5 b are formed at the ends of the piles 1 a and 1 b, and the flanges 5 a and 5 b are connected with bolts and nuts 6. Joining is the simplest and most secure means of obtaining a joint. However, for example, when a prestressed concrete foundation pile is manufactured by centrifugal molding, a pile having an outer diameter larger than the outer diameter of the pile is not preferable. Therefore, the end plate of the pile is usually not formed like the flanges 5a and 5b larger than the outer diameter of the pile, but is formed to have the same outer diameter as the outer diameter of the pile. Therefore, it cannot be coupled as shown in FIG.
[0003]
[Problems to be solved by the invention]
The present invention provides a connection hardware that is a welded joint, has the same strength and rigidity as a flange joint, is easy to perform on-site, and has a technically superior structure in the connection of such upper and lower piles. For the purpose.
[0004]
[Means for Solving the Problems]
The present invention has been developed from such a viewpoint, and comprises the following technical means. That is, the present invention is a disk-shaped end plate attached to the ends of the upper and lower piles to be connected, and a cylinder that is fitted on the outer periphery of the disk-shaped end plate and whose pile axial dimension is larger than the total thickness of the upper and lower end plates ring and to form a counter lock that engages the inner peripheral surface of the cylindrical ring, the upper and lower flanges of each of the plurality breaking positioned above and below the cylindrical ring provided on the inner peripheral side cylindrical projecting portion that presses the end plate If, to provide connection hardware of piles, characterized in that a plurality of bolts and nuts for binding them through the said cylindrical ring and said upper and lower flanges.
[0005]
In this case, it is preferable to provide an annular concave and convex tenon on the contact surface of the end plates of the upper and lower piles because the upper and lower piles can be easily aligned and the cylindrical ring and the upper and lower flanges can be easily attached.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 3 is a longitudinal sectional view of the connecting portion of the pile of the embodiment, and a cylindrical ring 10 fitted on the end plate 2a of the upper pile 1a and the end plate 2b of the lower pile 1b, and a flange 20 disposed above and below the cylindrical ring 10. 30 are bound together by bolts and nuts 40. FIG. 1 is a partial cross-sectional view of a bolt coupling portion of a connection hardware of a pile according to an embodiment.
[0007]
As shown in FIG. 1, the end plates 2a and 2b of the upper and lower piles are formed to be equal to or smaller than the outer diameter of the piles 1a and 1b. Therefore, the pile concrete near the end plate is also produced by giving a squeeze like the pile end sleeves 3a and 3b. The contact surfaces of the end plates 2a and 2b are centered by the concave and convex tenon ring portion 7.
The cylindrical ring 10 is fitted on the end plates 2a and 2b. The cylindrical ring 10 is loosely fitted to the outer peripheries of the end plates 2a and 2b, and the dimension in the pile axial direction is larger than the sum of the two end plates 2a and 2b. The upper flange 20 is divided into a plurality of portions in the circumferential direction, and an inner ring 21 is attached to the inner surface of the cylindrical ring 10 on its inner diameter side. This wax 21 is a cylindrical protrusion that matches the inner diameter of the cylindrical ring 10, and has the function of positioning the plurality of flanges 20 and pressing the end plates 2a and 2b. The lower flange 30 has a wax 31 that locks upward on the inner surface of the cylindrical ring 10. FIG. 2 shows a cross section taken along the line A-A in FIG. 1 and shows a flange 20 that holds the end plate 2a (see FIG. 1) of the pile 1a. This flange is divided into two at the split 22. Of course, it may be divided into three or more. The same applies to the lower flange 30. The connection metal fitting of an Example tightens the end plate of a pile firmly, and has the intensity | strength and rigidity equivalent to a normal flange coupling | bonding.
[0008]
【The invention's effect】
According to the present invention, the same strength and rigidity as the flange joint can be obtained without using welding as the structure of the connecting portion of the pile, and the pile can be joined very easily. In addition, the uneven tenon ring portion increases the bending rigidity against the external force in the direction perpendicular to the pile.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a connection hardware of an embodiment.
FIG. 2 is a cross-sectional view taken along the line AA in FIG.
FIG. 3 is an overall cross-sectional view of a connection hardware according to an embodiment.
FIG. 4 is an explanatory diagram of a flange joint.
[Explanation of symbols]
1a, 1b Pile 2a, 2b End plate 3a, 3b Sleeve 5a, 5b Flange 6 Bolt 7 Tenon 10 Cylindrical ring 11 Bolt hole 20 Upper flange 21 Inro 22 Split 30 Lower flange 31 Inro 40 Bolt nut

Claims (2)

A disk-shaped end plate attached to the ends of the upper and lower piles to be connected; a cylindrical ring that is fitted on the outer periphery of the disk-shaped end plate and whose pile axial dimension is larger than the total thickness of the upper and lower end plates; and the cylindrical ring A plurality of upper and lower flanges respectively formed on the upper and lower sides of the cylindrical ring, each having a cylindrical protrusion that presses the end plate on the inner peripheral side. A pile connection hardware comprising a plurality of bolts and nuts that penetrate the cylindrical ring and bind them.   The connecting metal fitting for a pile according to claim 1, wherein an annular concave and convex tenon is provided on a contact surface between the end plates of the upper and lower piles.

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