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Large-diameter reinforcing steel bar lifting tongs

A large-diameter, fixture technology, applied in the field of hoisting fixtures and large-diameter steel bar hoisting fixtures, can solve problems such as potential safety hazards and inconvenient operation

Active Publication Date: 2012-03-21
CHINA NUCLEAR IND HUAXING CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of transportation is not only inconvenient to operate, but also has potential safety hazards.

Method used

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  • Large-diameter reinforcing steel bar lifting tongs
  • Large-diameter reinforcing steel bar lifting tongs
  • Large-diameter reinforcing steel bar lifting tongs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The large-diameter steel bar hoisting fixture of the present embodiment is as figure 1 and figure 2 As shown, it includes a fixture frame 1 with a groove extending in the horizontal direction, and an inverted U-shaped lifting ring 2 is welded on the fixture frame 1 . The lower side of the groove is the clamping wall 1-1 forming the fixed jaw, and the upper side is the installation wall 1-2 for installing the movable jaw 3-1. The outside (the present embodiment is the upper side) of the installation wall 1-2 is equipped with the clamping handle 3 that drives the movable jaw 3-1 to move towards the direction of the relative fixed jaw 1-1 by a screw pair (this structure is different from that used by existing fitters. The structure of the movable jaw of vise is similar, so it will not be described in detail). The opposite surfaces of the movable jaw 3-1 and the fixed jaw 1-1 are concave arc surfaces with clamping lines. The clamping pattern matches the thread on the la...

Embodiment 2

[0022] The large-diameter steel bar hoisting fixture of the present embodiment is as image 3 and Figure 4 As shown, the difference from the first embodiment is that the groove of the fixture frame 1 extends in the vertical direction, so it is suitable for vertical lifting of large-diameter steel bars. In order to ensure that the steel bar is in a vertical state when hoisting, this embodiment is also equipped with Figure 5 As shown in the limiting collar 4, the limiting collar is composed of a horizontal retaining ring 4-1 and a vertical lifting ring 4-2 welded on the retaining ring. When used, such as Figure 8 As shown, the fixture frame 1 is connected with the long sling 8-1, and clamps it at the lower part of the steel bar 6, and the limit collar 4 is connected with the short sling 8-2, and is located at the upper part of the steel bar 6, thereby keeping the large-diameter steel bar 6 at the top of the steel bar 6. Always be in an upright state during hoisting or hois...

Embodiment 3

[0024] The large-diameter steel bar hoisting fixture of the present embodiment is as Figure 6 As shown, its structural feature is that the suspension ring is composed of two mutually perpendicular horizontal rings 2-1 and vertical rings 2-2 bent by a steel circle. After clamping the steel bar, you may need to select a suitable ring, so that The same lifting fixture can meet the needs of horizontal lifting or vertical lifting.

[0025] The lifting ring can also be inserted into the corresponding jack of the fixture frame through the indexing shaft. The outer circle of the indexing shaft is made with two positioning depressions with an angular interval of 90 degrees. The fixture frame is made with a positioning hole leading to the jack. Threaded holes in which set screws corresponding to the positioning recesses are installed. Therefore, one of the positioning depressions on the indexing shaft can be tightened by means of set screws as required, so that the length direction of...

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Abstract

The invention relates to a pair of large-diameter reinforcing steel bar lifting tongs, and belongs to the technical field of civil engineering construction. The pair of tongs comprises a tongs frame with a groove; a lifting ring extends from the tongs frame; a clamping wall forming a regular jaw is mounted on one side of the groove; a mounting wall for mounting a moving jaw is arranged on the other side of the groove; a clamping handle is arranged on the outer side of the mounting wall through a screw pair and drives the moving jaw to move in a direction opposite to the regular jaw; at least one surface of the moving jaw opposite to the regular jaw is a concave cambered surface with clamping veins; and the clamping veins are matched with reinforcing steel bar threads. When the large-diameter reinforcing steel bar lifting tongs are used, a reinforcing steel bar is placed in the groove of the tongs frame, then the clamping handle is rotated to enable the moving jaw and the regular jaw to tend to be gathered up to clamp the reinforcing steel bar conveniently and reliably, and afterwards the lifting ring is hooked by lifting equipment such as a crane, so that the reinforcing steel baris easily and safely lifted.

Description

technical field [0001] The invention relates to a hoisting fixture, in particular to a large-diameter steel bar hoisting fixture, which belongs to the technical field of civil engineering construction. Background technique [0002] In the construction of large-scale industrial plants and high-rise civil buildings, large-diameter steel bars above φ20 are often used. Due to the large weight of such steel bars, cranes must be used for lifting during construction. As far as the applicant knows, for a long time, steel wire ropes have been used on the construction site for winding and hoisting by cranes. This transfer is not only inconvenient to operate, but also has potential safety hazards. Contents of the invention [0003] The primary purpose of the present invention is to design a large-diameter steel bar hoisting fixture that is easy to operate and can ensure safety, so as to ensure fast and safe hoisting or lifting of large-diameter steel bars, and reduce construction r...

Claims

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Application Information

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IPC IPC(8): B66C1/12B66C13/08
Inventor 徐晓明陈宝智秦亚林魏建国黄明洋
Owner CHINA NUCLEAR IND HUAXING CONSTR
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