JPH088090Y2 - PC pile end plate connection joint - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting joint for end plates used for manufacturing a PC pile (referred to as a prestressed cocreate pile).

[0002]

2. Description of the Related Art PC piles are constructed by placing a plurality of PC steel wires in a mold in a tensioned state on the same circumference.
C steel wire is attached with reinforcing spirals, aggregates and concrete are charged, and while rotating the form, centrifugal force is exerted on the concrete inside to form into a pipe shape, but as shown in FIG. Usually, two piles 10 and 11 are simultaneously molded. The end plates 12 and 13 are provided facing the central ends of the piles 10 and 11. However, if the end plates 12 and 13 are closely attached to each other to form the piles 10 and 11, the separation is difficult. Therefore, the separating member is arranged at the center. A nut is generally used as the separating member, and the outside of the nut is welded to the end plate. In addition, in some cases, the end plate 12
(13 is also the same) As shown in FIG. 7, hole 1 through which the PC steel wire passes
In addition to 5, the rivet hole 16 is provided and an aluminum rivet 17 is mounted as shown in FIG.
In the figure, 18 is a form, 19 is a jig, and 20 is a PC steel wire.

[0003]

[Problems to be Solved by the Invention] However, when a nut is used as the separating member, welding at the time of mounting and disconnection at the time of disassembling are extremely troublesome, and in the case of an aluminum rivet, it is better than a steel nut. Easy to cut,
Since the mounting work and the cutting work are required, there is a problem that it is extremely troublesome. The present invention has been made in view of the above circumstances, and an object thereof is to provide a connecting joint for end plates of a PC pile that can be easily attached and cut.

[0004]

A connecting joint for an end plate of a PC pile according to claim 1, which is in accordance with the above object, is made of synthetic resin and has small diameter portions on both sides of a central large diameter portion. A cylindrical coupling joint having bulged portions that gradually expand in diameter from both ends on both sides of the small diameter portion, and the bulged portion is formed with a number of vertical split grooves in the vertical direction. .

[0005]

According to the first aspect of the present invention, there is provided a connecting joint for an end plate of a PC pile, which is entirely made of a synthetic resin and has a bulge portion having vertical split grooves formed on both sides thereof. It can be easily inserted into a hole having a slightly smaller diameter than the bulging portion provided on the end plate, and since it is tubular, the PC steel wire can be passed through the center. Therefore, the mounting is easy, and when cutting, the PC joint can be cut at the same time by cutting the PC steel wire.

[0006]

Embodiments of the present invention will now be described with reference to the accompanying drawings to provide an understanding of the present invention. 1 is a sectional view showing a state in which a connecting joint is used for an end plate of a PC pile according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the same part, and FIG. 3 is a sectional view of the end plate of the PC pile. Drawing which shows a side surface and a front, Drawing 4 is a front view of an end plate used for this example.

As shown in FIGS. 3A and 3B, the connecting joint 21 of the end plate of the PC pile according to the embodiment of the present invention is
It is made of a synthetic resin such as ABS or PP and has small diameter portions 23 and 24 on both sides of a central large diameter portion 22.
On both sides of 3, 24, a bulging portion 2 that gradually expands in diameter from both ends
5 and 26, the insertion hole 28 of the PC steel wire 35 is formed at the center in the longitudinal direction.

The bulged portions 25 and 26 are provided with vertical dividing grooves (8 in this embodiment) 29 and 30, respectively. The bulging portions 25 and 26 are tapered so that the tips are thin, and when the bulges 25 and 26 are mounted in the mounting holes 32 of the end plate 31 shown in FIG. It does not come off when the mounting hole 32 reaches.

Therefore, when the connecting joint 21 of the end plate of this PC pile is used, the connecting joint 21 is first inserted into the mounting hole 32 of one end plate 31 as shown in FIG. 2 (A). After that, as shown in FIG. 2B, the other side of the coupling joint 21 is attached to the attachment hole 34 of the other end plate 33, and the PC is inserted into the insertion hole 28 in the center as shown in FIGS. 1 and 3. The steel wire 35 is inserted. When the formed pile is to be cut off after a predetermined work, a saw is put in the central portion of the connection joint 21 of the end plate of the PC pile to cut it together with the PC steel wire 35.

[0010]

As is apparent from the above description, the connecting joint for the end plates of the PC pile according to claim 1 is entirely made of synthetic resin material, and the bulging portions at both ends are used as the end plates. It is mounted by loading, and since the PC steel wire insertion hole is provided inside, it is extremely easy to install and cut.

[Brief description of drawings]

FIG. 1 is a partially omitted sectional view of a state in which a connection joint is attached to an end plate of a PC pile according to an embodiment of the present invention.

FIG. 2 is an enlarged view of the same portion.

FIG. 3 is a view showing a side surface and a front surface of a connection joint of an end plate of the PC pile.

FIG. 4 is a plan view of an end plate using a connection joint of the end plates of the PC pile.

FIG. 5 is a side view showing a method for manufacturing a PC pile according to a conventional example.

FIG. 6 is an enlarged view of the same portion.

FIG. 7 is a front view of the end plate.

[Explanation of symbols]

 21 PC Pile End Plate Connection Joint 22 Large Diameter Part 23 Small Diameter Part 24 Small Diameter Part 25 Swelling Part 26 Swelling Part 28 Insertion Hole 29 Vertical Split Groove 30 Vertical Split Groove 31 End Plate 32 Mounting Hole 33 End Plate 34 Mounting Hole 35 PC steel wire

Claims (1)

[Scope of utility model registration request] 1. A cylindrical coupling joint made of synthetic resin, having small diameter portions on both sides of a central large diameter portion, and having bulging portions on both sides of the small diameter portion that gradually expand in diameter from both ends. In addition, a connecting joint for end plates of a PC pile, characterized in that a large number of vertical split grooves are formed in the vertical direction in the bulging portion.