JPH11349278A - Lifting clamp and lifting tool for caisson type pile foundation reinforcing rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve work efficiency and safety by easily and reliably attaching and detaching a lifting clamp and recovering the lifting clamp outside a vertical pile. SOLUTION: This caisson type pile foundation reinforcing rod lifting device is constituted of a receiving table 2 to be attached to the lower part of a cage- shaped reinforcing rod, and a lifting clamp 3 for gripping the receiving table 2. The lifting clamp 3 is constituted of a frame 4 and a pin hook 5 which pinch a longitudinal frame 2a of the receiving table 2, and a releasing pin 7 for regulating the movement of the pin hook 5. When the pin hook 5 is suspended after being connected to a lifting rope R, force toward the frame 4 side acts, a pin 5e of the pin hook 5 is inserted through holes 2c, 4d, and the pin hook 5 reliably-grips the receiving table 2. A spring 6 for energizing the frame 4 and the pin hook 5 in the opening direction is interposed between the frame 4 and the pin hook 5. When the releasing pin 7 is inserted in an insertion cylinder 4c of the frame 4, the pin hook 5 is prevented from being rotated, while, when the releasing pin 7 is drawn out by a drawing rope 9, the stop of the rotation of the pin hook 5 is released.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting clamp for gripping and lifting a relatively heavy object, and a crane for reinforcing a cage-shaped reinforcing bar when burying a foundation of a power transmission tower in the ground. TECHNICAL FIELD The present invention relates to a hanging device for a deep foundation foundation reinforcing bar for hanging down at a base.

[0002]

2. Description of the Related Art Conventionally, in order to bury a foundation of a steel tower leg, a basket-shaped reinforcing bar constituting a foundation is suspended in a shaft A by a crane as shown in FIG. H1 is a suspension ring H2 with suspension ropes R bundled.
And hung it. The suspension rope R is connected to an upper part of the cage rebar S.

[0003]

In the above-mentioned conventional hanging tool, the hanging rope R is attached to the basket-shaped reinforcing bar S on the ground, and the cage-shaped reinforcing bar S is hung down on the shaft A. And the hanging rope R is removed. Since it is dangerous for a worker to wait in the shaft A before hanging the cage S, it is dangerous to repeat the hanging of the cage S a plurality of times. You have to climb, it is dangerous, it takes a lot of effort, and it takes time. In addition, it is not easy to attach and detach the hanging tool, and if it is not securely fixed, it may come off and be dangerous, requiring technical skill. Therefore, an object of the present invention is to improve the working efficiency and safety by easily attaching and detaching a hanging tool, securely attaching the hanging tool, and remotely removing the hanging tool from outside a shaft.

[0004]

In order to solve the above-mentioned problems, in the first invention, a hook is rotatably and relatively rotatably opposed to the frame 4 so that the object to be gripped is held between the frame 4 and the frame. 5 is provided at the upper end of the hook 5 with a pulling handle 5b to which the hanging rope R is coupled, and a spring 6 is provided between the hook 4 and the frame 4 so as to be urged in a rotational direction away from the frame 4. A release pin 7 which is relatively movable up and down within a certain range so as to be able to advance and retreat during the rotation of the hook 5 is prevented from rotating at the lower end of the moving range, while the rotation of the hook 5 is made at the upper end. And a lifting rope was constructed by connecting the release pin 7 to a pull rope 9 for lifting upward at a remote position. In the second invention, the cradle 2 is attached to the lower part of the cage rebar S, and a lifting clamp to which a hanging rope R is coupled is attached to the cradle 2 to lift the cradle 2 with a crane. A pin 5e protruding toward the frame 4 is provided at the lower end of 3, and a through hole 2c through which the pin 5e penetrates is provided in the receiving base 2, thereby forming the hanging device 1 for a deep foundation foundation rebar.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the suspension device 1 for a deep foundation foundation rebar includes a pedestal 2 attached to a lower portion of a cage-shaped rebar S, and a lifting clamp 3 for gripping the upper portion of the pedestal 2 and lifting it with a crane. And At the edge of the cradle 2, three substantially vertical vertical frames 2a are equally spaced.
Is provided. Inside the vertical frame 2a, there is a basket-shaped reinforcing bar S
Has a mounting pipe 2b fixed so as to fit and support the reinforcing bar S1. The vertical frame 2a has a through hole 2c.

[0006] As shown in FIGS. 2 and 3, the lifting clamp 3 includes a frame 4, a pin hook 5, and a release pin 7. As shown in FIGS. 4 to 6, the frame 4 has a substantially U-shaped cross section with hanging plates 4a, 4a rising on both sides of the middle plate 4b. The side plates 4a, 4a are cut so as to straddle the upper edge of the vertical frame 2b. An insertion tube 4c is provided between the upper ends of the side plates 4a. The upper surface of the insertion tube 4c has an elongated hole 4d in the axial direction. The bottom plate 4b is provided with a through hole 4e.

[0007] Between the side plates 4a of the frame 4,
A pin hook 5 is pivotally mounted on a pivot 5a so as to be relatively rotatable. As shown in FIGS. 7 to 9, the tip of the pin hook 5 is provided with a pull 5 b for attaching a U-shaped clevis C to which a hanging rope is connected. On the back surface of the pin hook 5, a recess 5c is provided. At the upper end of the recess 5c, there is provided a release recess 5d that is slightly deepened. At the lower end of the pin hook 5, a pin 5e projecting toward the bottom plate 4b of the frame 4 is fixed. The pin 5e can be suspended between the frame 4 and the pin hook 5 by passing through the through holes 2c and 4d to suspend the vertical frame 2b. A spring 6 is interposed between the frame 4 and the pin hook 5 and urges the pin hook 5 in a direction away from the frame 4.

A release pin 7 is provided on the insertion tube 4c of the frame 4.
Are movably inserted. As shown in FIGS. 10 and 11, a hook 7a is formed at the tip of the release pin 7, moves along the recess 5c of the pin hook 5, and allows the rotation of the pin hook 5 by the release recess 5d. . A bolt 8 is screwed into the release pin 7 in the orthogonal direction. This bolt 8
The head 8a is disposed in the elongated hole 4d of the insertion tube 4c to restrict the moving range of the release pin 7. A pull rope 9 extending outside the shaft is connected to the release pin 7 so that pull-out operation can be performed from a remote location. The release pin 7 is inserted into the insertion tube 4c of the frame 4 while the pin hook 5 is inserted.
Is pressed against the frame 4 side to stop the rotation, and in a state where the pin hook 5 is pulled out, the rotation stop of the pin hook 5 with respect to the frame 4 is released.

In this lifting device 1, first, a receiving base 2 is attached to a lower part of a cage-shaped reinforcing bar S, and a lifting clamp 3 is mounted on three vertical frames 2a of the receiving base 2 and lifted by a crane. As shown in FIGS. 12A and 12B, in order to mount the lifting clamp 3, first, the frame 4 of the lifting clamp 3 is disposed so as to straddle the vertical frame 2a of the receiving base 2, and the through hole 4d is inserted into the through hole 4d. Align to match 2c.
Next, as shown in FIG. 13A, the release pin 7 is pushed into the insertion tube 4c, the pin hook 5 is rotated while compressing the spring 6, and the pin 5e is passed through the through-hole 2c and the through-hole 4d. As long as the release pin 7 is not pulled out,
It does not return to its original position, so the lifting clamp 3
Is securely fixed to the cradle 2. Moreover, FIG.
As shown in (2), if the hanging rope R is stretched when the cradle 2 is lifted, a force acts on the pin hook 5 so as to be pressed against the frame 4 side, so that the cradle 2 is more securely gripped in the suspended state. I do. When the wire rope R is stretched, the release pin 7 is pushed by the pin hook 5 and the insertion tube 4 is pushed.
c, it cannot be pulled out even if the pulling rope 9 is pulled.

On the other hand, as shown in FIGS.
When the cage rebar S and the cradle 2 are lowered into the shaft A and the hanging rope R is loosened, the pin hook 5 is no longer pressed against the release pin 7, so that the release pin 7 can be pulled out from the insertion tube 4c. Accordingly, when the pulling rope 9 is pulled, the release pin 7 is pulled out from the insertion tube 4c while the bolt head 8a is guided by the long hole 4e of the insertion tube 4c, and the lock of the pin hook 5 is released. As shown in FIG. 15 (A), when the pin hook 5 is rotated by the spring 6 and the pin 5e comes out of the through hole 2c and the through hole 4d, and the pin hook 5 returns to the original position, the lifting clamp 3 is moved from the receiving stand 2. Since the lifting clamp 3 can be removed, the lifting clamp 3 can be recovered as it is by continuing to pull the pulling rope 9 (FIG. 9B).

[0011]

As described above, according to the first aspect of the present invention, the lifting clamp can be easily mounted by pushing the release pin, and the lifting clamp can be easily removed only by pulling out the release pin. It has the effect of being able to perform the removal operation at the position, and to securely grip the object to be gripped when it is mounted and suspended. According to the second aspect of the present invention, since the cage rebar S can be lifted down and the lifting clamp can be removed from the outside of the shaft and collected, the danger associated with entering and exiting the shaft can be avoided, and the work labor can be reduced. This has the effect of improving work efficiency.

[Brief description of the drawings]

FIG. 1 is a front view of a suspension device for a deep foundation foundation reinforcing bar according to the present invention.

FIG. 2 is a partially cutaway front view of a lifting clamp of the hanging device for a deep foundation foundation reinforcing bar according to the present invention.

FIG. 3 is a side view of a lifting clamp.

FIG. 4 is a plan view of a lifting clamp.

FIG. 5 is a perspective view of a frame.

FIG. 6 is a front view in which a part of a frame is cut away.

FIG. 7 is a perspective view of a pin hook.

FIG. 8 is a front view of the pin hook.

FIG. 9 is a plan view of a pin hook.

FIG. 10 is a perspective view of a release pin.

FIG. 11 is a front view of a release pin.

FIG. 12 is a front view showing the progress of attachment of the lifting clamp.

FIG. 13 is a front view showing the progress of attachment of the lifting clamp.

FIG. 14 is a front view showing the process of removing the lifting clamp.

FIG. 15 is a front view showing the process of removing the lifting clamp.

FIG. 16 is a front view of a conventional deep foundation foundation reinforcing bar suspension device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Suspension device for foundation foundation reinforcement 2 Cradle 3 Lifting clamp 2b Vertical frame 2c Through hole 4 Frame 4c Inserting cylinder 4d Long hole 5 Pin hook 5a Axis 5b Puller 5e Pin 6 Spring 7 Release pin 8 Bolt 9 Pull rope S Cage shape Rebar

 ──────────────────────────────────────────────────続 き Continuing from the front page (71) Applicant 391035795 Shiroishi Co., Ltd. 3-4-1 Marunouchi, Chiyoda-ku, Tokyo (71) Applicant 594056421 Shirakawa Electric Civil Engineering Co., Ltd. 3- 21-5 Shirokane, Showa-ku, Nagoya-shi, Aichi Prefecture No. (71) Applicant 000183392 Sumitomo Electric Co., Ltd. 2-1-1, Awaza, Nishi-ku, Osaka-shi, Osaka (71) Applicant 000207780 Taitoyo Construction Co., Ltd. 1-4-24 Shinkawa, Chuo-ku, Tokyo (71) Applicant 000212739 Chuden Construction Co., Ltd. 4-45, Suzumo-cho, Mizuho-ku, Nagoya-shi, Aichi (71) Applicant 000219820 Toenec Corporation 1-20-31, Sakae, Naka-ku, Nagoya-shi, Aichi (71) Applicant 592091529 Toko Electric Works Co., Ltd. 1-4-5 Nishikanda, Chiyoda-ku, Tokyo (71) Applicant 592049542 Himeno Co., Ltd. No. 19 (71) Applicant 000177944 Yamaka Dengyo Co., Ltd. 2-3-11 Shibuya, Shibuya-ku, Tokyo (72) Inventor Noriyuki Tanaka 6-5-19 Minamishinagawa, Shinagawa-ku, Tokyo Sanwa Tekki Co., Ltd. (72) Inventor Yoshio Murase 4-6-25 Sakae, Naka-ku, Nagoya City, Aichi Prefecture Inside Kawakita Electric Industry Co., Ltd. (72) Inventor Seiki Ikeda 2-12-1, Aoi 2-chome, Higashi-ku, Nagoya City, Aichi Prefecture Sato Construction (72) Inventor Toshiaki Arakawa 2-14-20 Tsurumai, Showa-ku, Nagoya City, Aichi Prefecture Suntech Chubu Branch Office (72) Inventor Yasutaka Kodama 1-14 Kanda Iwamotocho, Chiyoda-ku, Tokyo 2nd Building Shiroishiuchi Co., Ltd. (72) Inventor Yoshiro Kinoshita 3-21-5 Shirokane, Showa-ku, Nagoya City, Aichi Prefecture Inside Shirakawa Electric Civil Engineering Co., Ltd. (72) Inventor Akira Okumura 2-chome Awaza, Nishi-ku, Osaka-shi, Osaka No. 4 Sumitomo Electric Co., Ltd. (72) Inventor Yoshio Nakanishi Nakamura-ku, Nagoya City, Aichi Prefecture 5-72 Warimachi, Nagoya Branch, Taitoyo Construction Co., Ltd. (72) Inventor Toshiaki Arima 3-7-1, Enwakacho, Minato-ku, Nagoya City, Aichi Prefecture Chuden Construction Co., Ltd. (72) Inventor Takayasu Iida Aichi 3-1-2, Millennen, Minato-ku, Nagoya-shi, Japan Toenec head office annex (72) Inventor Hiroyuki Terasawa 1-33-2 Shinei, Naka-ku, Nagoya-shi, Aichi Toko Electric Works Chubu branch office (72) Invention Person Masato Shimizu 12-19 Higashi-Osone-cho, Higashi-ku, Nagoya-shi, Aichi Prefecture Inside Himeno Chubu Branch (72) Inventor Seiichi Kurihara 5-5-1, Imaike, Chigusa-ku, Nagoya-shi, Aichi Imaike Building Yamakaden Industry Co., Ltd. Nagoya branch office

Claims (2)

[Claims] 1. A frame disposed on one side of an object to be grasped, and is rotatably pivotally opposed to the frame so as to sandwich the object to be grasped between the frame and the object to be grasped. A hook provided with a puller to which the rope is coupled, and a spring interposed between the frame and the frame, the spring being biased in a rotational direction; and a hook which is attached to the frame so as to be relatively movable up and down within a certain range, and the rotation of the hook A release pin, which is arranged so as to be able to advance and retreat on the way and stops the hook from rotating on one side of the movement range, while allowing the rotation of the hook on the other side, and to which a pull rope is coupled for pulling up at a remote position. Lifting clamp. 2. A cradle attached to a lower portion of a cage rebar, and a lifting clamp according to claim 1, which is attached to a cradle by attaching a hanging rope for lifting the cradle with a crane. A lifting device for a deep foundation foundation reinforcing bar, comprising: a pin protruding toward a frame at a lower end portion of the lifting clamp; and a through hole through which the pin penetrates.