JPS6217228A - Suspending tongs for prc-like pile - Google Patents

Abstract

PURPOSE:To removably a set a cylindrical unit with exactness, by mounting the cylindrical body on a pile penetrating through a reinforcement protruded from the pile, and by setting an external cylinder engaged with the cylindrical body, and a chuck for holding and tightening the reinforcement with a bolt and a nut set at the other end and for moving in the external shell. CONSTITUTION:Respectively at the upper end and the lower end of an external plate 2a and an internal plate 2b, ring head-plates 2c and washers 2d are fixed to form a cylindrical body 2. In an external cylinder 3 engaged with the head- plates 2c, a slidable chuck 4 is set. A reinforcement 1 protruded from a pile is held by the chuck 4, and a nut 6 is tightened, and the chuck 4 is moved and transformed to perfectly grasp the reinforcement 1.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to PRC piles, particularly deformed reinforcing bars (reinforcing bars) for reinforcement.
This relates to hanging rods such as stakes that are fixed to the footings by protruding from the end plates, or by having reinforcing bars for connection with footings protrude from the end plates.

Conventional technology Current PRC piles (P to strengthen the weak toughness of PC piles
In general, as shown in FIG. 3, the top end of the reinforcing bars 1 is covered with concrete. The reason for this is that the construction method is hammering or digging. Therefore, as shown in Fig. 4, reinforcing reinforcing bars with a design-required length L are cut out according to the construction procedure and the footings are erected, resulting in a very wasteful structure.

The applicant of this patent previously proposed in Japanese Patent Application No. 60-72204 a PRC pile formed with reinforcing reinforcing bars protruding in advance and a cap for sinking the pile, but the cap for sinking the pile avoids the protruding ends of the reinforcing bars. This method suppresses the settling of the PRC pile and cannot lift the PRC pile. Therefore, in the medium excavation method, etc., the concrete pile may fall into the excavation hole, making construction difficult.

Problems to be Solved by the Invention As described above, in the prior art, there is a problem in that safe and reliable construction such as the hollow excavation method cannot be performed because no technology has been developed that allows chucking of PRC piles etc. that have protruding reinforcing bars. was there.

Means for Solving the Problems The hanging shirt for PRC piles, etc. of the present invention has the following configuration as a means for solving the above problems.

(1) A cylindrical body is provided on a pile having an appropriate number of reinforcing bars protruding from the end thereof, and the protruding reinforcing bars are passed through and placed on the pile, and an outer cylinder that engages with the cylindrical body and an inner part of the outer cylinder are provided. A chuck is provided for gripping and tensioning the reinforcing bar, which moves back and forth and supports at the center, by the action of a bolt and nut provided at the other end.

(2) The cylindrical body has a hollow structure in which an annular head plate and a seat plate are fixed to the upper and lower ends of the outer plate and the inner plate, respectively, and the head plate has an engagement hole in the outer cylinder that extends over the engagement hole. The seat plate is provided with through holes for protruding reinforcing bars.

(3) forming at one end of the chuck a tapered thick part having a split on the outside of the central hole that supports the protruding reinforcing bar;
At the other end, a bolt is locked and supported by the head, and is attached to the outer cylinder. A through-hole is provided for the bolt, and the bolt protrudes through the hole and is fastened to the outer cylinder with a nut.

Function: When the bolt is tightened by the nut, the outer periphery of the thick part of the chuck contacts the inner periphery of the outer cylinder and shrinks, so the protruding reinforcing bar is firmly grasped and tensioned through the center hole. The reinforcing bar can be easily released by loosening the nut.

Embodiment FIGS. 1 and 2 are books showing an example of implementing the present invention, and the cylindrical body 2 through which the reinforcing steel bar 1 is passed has a hollow structure with an outer plate 2m, an inner plate 2b, a head plate 2c, and a seat plate 24. formed, headboard 2
C is provided with an engagement hole 2s (elongated hole) of the outer cylinder 3, and a through hole (elongated hole) 21 of the reinforcing bar 1 is provided in the seat plate 2d. headboard 2c
A slidable chuck 4 is provided inside the outer cylinder 3 that engages with the inner cylinder 3, and one end of the chuck 4 has a center hole 4a for supporting the reinforcing steel 1, and a tapered wall with a split is provided on the outside of the center hole 4a for supporting the reinforcing reinforcing bar 1. A thick portion 4b is provided, and the other end supports a bolt 5 by locking its head. Therefore, when the nut 6 is tightened in FIG.

In addition to the above-mentioned embodiments, the present invention can also be applied to piles in which reinforcing bars connecting to footings are fixed to the end plates.

Effects of the invention (1) The structure is simple and the installation and removal are reliable.

(2) Even if the protruding length of the protruding reinforcing bars changes, it can be reliably continued.

(3) If the pile diameter is the same, changes in the number of protruding reinforcing bars can be accommodated by through holes 2 (elongated holes), and changes in reinforcing bar diameter can be easily accommodated by replacing the chuck 4.

(4) By employing this device, the conventional chiseling process is omitted, making construction much easier.

[Brief explanation of drawings]

Fig. 1 is a plan view (4), a partially cutaway front view (B), and an A-A cross-sectional view (0) showing an example of the implementation of the present invention, and Fig. 2 is a cross-sectional view showing an enlarged main part ( 6), bottom view (B),
FIG. 3 is a sectional view showing a conventional example, and FIG. 4 is an explanatory view showing the construction procedure. The symbols in the drawings indicate the following members, respectively. 1: Reinforcement bar 2: Cylindrical body 3: Outer cylinder 4: Chuck 5: ? Root 6: Natsuto Patent Applicant Agent of Nippon Concrete Industry Co., Ltd.
Kobashi - Male, · · · ;-r- Masaaki Kobashi ゛Mei' - Jealous ·
,°- spear 1m (A) IQC knee (B)

Claims (1)

[Claims] 1. A cylindrical body is provided on a pile having an appropriate number of reinforcing bars protruding from the end thereof, and the protruding reinforcing bars are passed through and placed on the pile, and an outer cylinder that engages with the cylindrical body is provided. P characterized in that it is provided with a chuck that moves back and forth within the outer cylinder and grasps and tensions the reinforcing bar supported at the center by the action of bolts and nuts provided at the other end.
Hanging guy for RC piles etc. 2. The cylindrical body has a hollow structure in which an annular head and a seat plate are fixed to the upper and lower ends of the outer plate and inner plate, respectively, and the head plate has an engagement hole in the outer cylinder and the seat. A hanging rod for a PRC pile or the like according to claim 1, wherein the plate is provided with through holes for protruding reinforcing bars. 3. One end of the chuck is formed with a tapered thick part having a split on the outside of the central hole that supports the protruding reinforcing bar, and the other end is provided with a bolt that is locked and supported by the head, and the outer cylinder. A hanging rod for a PRC pile or the like according to claim 1, wherein a through hole is provided for the bolt and the bolt protruding through the bolt is fastened to the outer cylinder with a nut.