Clamping piece special for safety anchor of lifting jack

Abstract

The utility model discloses a special clamping piece for a safety anchor of a lifting jack, which relates to the technical field of anchorage device clamping pieces and comprises a hollow cone frustum enclosed by a plurality of symmetrical clamping piece bodies, the upper section of an inner cavity of the hollow cone frustum is a hole section with a smooth inner wall, and the inner walls of the middle section and the lower section of the inner cavity are provided with threads. The anchor plate clamping piece is characterized in that a circle of boss extending outwards is arranged on the circumference of the large head end of the hollow cone frustum, compared with the prior art, due to the fact that the circle of boss extending outwards is arranged on the circumference of the large head end of the hollow cone frustum, when the clamping piece and the steel strand enter the conical hole of the anchor plate together, the boss is hung on the conical hole, and the clamping piece and the steel strand are not prone to falling off. Under the condition that a heavy object needs to be put down, under the action of the clamping piece boss, the positioning plate inserted below the clamping piece boss can separate all the clamping pieces from the whole safety anchorage device, the taking-out speed is high, and the efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of jacks, in particular to a special clip for a safety anchor of a lifting jack. Background Art

[0002] The safety anchor uses the wedging force of its special clip and the anchor plate to clamp the steel strand. When the lifting jack applies stress to the steel strand and then releases it, the clip is brought into the tapered hole of the anchor plate by the reverse force generated by the steel strand. At the beginning, the clip and the steel strand are not deeply engaged, and the retraction speeds of the steel strand and the clip are inconsistent. After engaging to a certain depth, the special clip and the steel strand enter the tapered hole of the anchor plate together to form an anchoring unit. The existing special clip for safety anchor has a structure of a hollow truncated cone surrounded by two symmetrical clip bodies or three rotationally symmetrical clip bodies, wherein the upper section of the cavity is a hole section with a smooth inner wall, wherein the inner walls of the middle and lower sections of the cavity are provided with thread teeth, and the large end thereof smoothly transitions to the small end. When the special clip and the steel strand enter the tapered hole of the anchor plate together, the large end of the special clip is immersed in the tapered hole of the anchor plate and is flush with the anchor plate. For the special clips with such a structure, when the lifting jack needs to lower the heavy objects during the lifting process, the special clips on the safety anchor need to be fully opened. The existing method is either to tap the thread on the big head end of the special clip, then screw on the small screw, and use the head of the small screw to lift the clip, or to manually take out the clips one by one, which is very inefficient; and the hollow frustum of the existing special clip has no chamfer at the connection between the upper smooth hole section of the inner cavity and the threaded teeth of the middle section, forming a sharp corner. When the tool clip is working, the bite mark at the sharp corner is very deep, forming a deep step, which leads to problems such as the tool clip being stuck when withdrawing the anchor, and it is also easy to damage the steel strand. Utility Model Content

[0003] The utility model aims to provide a special clip for a safety anchor of a lifting jack, which can solve the problem of low efficiency when taking out the special clip for the existing safety anchor.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is: it includes a hollow frustum formed by several symmetrical clip bodies, the upper section of the inner cavity of the hollow frustum is a hole section with a smooth inner wall, the inner walls of the middle and lower sections of the inner cavity are provided with threaded teeth, and a circle of bosses extending outwards is provided on the circumference of the large head end of the hollow frustum.

[0005] In the above technical solution, a more specific solution may also be: the connection between the upper smooth hole section of the inner cavity of the hollow frustum and the thread teeth of the middle section is chamfered.

[0006] Furthermore: the outer wall of the upper section of the hollow frustum is a cylindrical surface from the boss to the lower section.

[0007] Further: the outer wall of the upper section of the hollow truncated cone is a conical surface with a larger top and a smaller bottom from the boss to the lower section.

[0008] Furthermore: the number of the clip bodies is three clip bodies which are rotationally symmetrically arranged.

[0009] Furthermore: the number of the clip bodies is two symmetrically arranged clip bodies.

[0010] Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0011] 1. Since a circle of outwardly extending bosses is provided on the circumference of the large end of the hollow frustum, when the clip and the steel strand enter the tapered hole of the anchor plate together, the bosses are hung on the tapered hole. When heavy objects need to be lowered, under the action of the clip bosses, the positioning plate inserted under the clip bosses will detach all the clips from the safety anchor as a whole, and the removal speed is fast and the efficiency is high.

[0012] 2. Since the connection between the upper smooth hole section and the middle threaded teeth of the hollow cone is chamfered, when the clip clamps the steel strand, the bite marks at the chamfered corners form a transition from shallow to deep, which does not damage the steel strand and is very conducive to the withdrawal of the clip. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of embodiment 1 of the utility model.

[0014] Figure 2 yes Figure 1 A-direction view.

[0015] Figure 3 It is a structural schematic diagram of the utility model installed in a safety anchor.

[0016] Figure 4 It is a structural schematic diagram of embodiment 2 of the present utility model.

[0017] The description of the accompanying drawings is as follows:

[0018] Special clip 1, hollow frustum 1-1, upper section 1-2, threaded teeth 1-3, boss 1-4, chamfered corners 1-5, safety anchor 2, positioning plate 3, pressure plate 4, retaining ring 5, guide sleeve 6, adjusting screw 7, fixing screw 8. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below with reference to the accompanying drawings and embodiments:

[0020] like Figure 1 to Figure 2The embodiment 1 shown in the figure comprises a hollow truncated cone 1-1 formed by three rotationally symmetrical clip bodies, the upper section 1-2 of the inner cavity of the hollow truncated cone is a hole section with a smooth inner wall, the inner walls of the middle and lower sections of the inner cavity are provided with thread teeth 1-3, and a circle of outwardly extending bosses 1-4 are provided on the circumference of the large end of the hollow truncated cone. When the clip and the steel strand enter the conical hole of the anchor plate together, the bosses are hung on the conical hole. When it is necessary to lower a heavy object, under the action of the clip bosses, the positioning plate inserted under the clip bosses will separate all the clips from the safety anchor as a whole, and the quick release The speed is fast and the efficiency is high; the connection between the upper smooth hole section of the inner cavity of the hollow frustum 1-1 and the threaded teeth of the middle section is chamfered; the outer wall of the upper section of the hollow frustum, that is, the outer wall section from the boss to the bottom, is a cylindrical surface, which can slide in the hole of the positioning plate of the safety anchor when the special clamp is loosened or clamped, and plays a role as a tightening guide; the connection between the upper smooth hole section of the inner cavity of the hollow frustum 1-1 and the threaded teeth 1-3 of the middle section is chamfered 1-5; when the clamp clamps the steel strand to work, the bite marks at the chamfered corners form a transition from shallow to deep, which does not damage the steel strand and is very conducive to the withdrawal of the clamp.

[0021] like Figure 3 As shown, the safety anchor 2 and the positioning plate 3 are arranged, the installation hole of the safety anchor is aligned with the hole position of the positioning plate 3, the special clip 1 of the utility model is installed into the hole position of the safety anchor 2 from the hole position of the positioning plate 3, the small head end is downward, the large head end is upward, the boss is hung on the positioning plate, and then the guide sleeve 6, the retaining spring 5 and the pressure plate 4 are installed, the guide sleeve 6 passes through the hole position of the pressure plate 4 in the reverse direction, under the action of the guide sleeve and the retaining spring, the large head end of the special clip forms a conical match with the guide sleeve, and the guide sleeve expands the special clip 1, so that The special clip 1 and the guide sleeve 6 are automatically aligned on the same axis, and the bundle steel hinge wire is passed through smoothly, which solves the problem of incomplete expansion of the existing clips and easy contact with the special clips when passing through the bundle. Finally, the adjusting screws 7 and fixing screws 8 are screwed on both sides of the pressure plate to complete the installation and fixation. When the special clip of the safety anchor needs to be fully opened, just loosen the fixing screws 8 and lift the positioning plate. Under the action of the special clip boss, the positioning plate 3 will detach all the clips from the safety anchor as a whole, and the disassembly and assembly speed is fast and the efficiency is high.

[0022] like Figure 4 In the embodiment 2 shown, the outer wall of the upper section of the hollow frustum, that is, the outer wall section from the boss downward is a conical surface that is larger at the top and smaller at the bottom, and the other structures are the same as those in the embodiment.

[0023] In other embodiments, the number of the clip bodies may also be two symmetrically arranged clip bodies.

Claims

1. A special clip for a lifting jack safety anchor, comprising a hollow truncated cone formed by a plurality of symmetrical clip bodies, wherein the upper section of the inner cavity of the hollow truncated cone is a hole section with a smooth inner wall, and the inner walls of the middle and lower sections of the inner cavity are provided with threaded teeth, characterized in that: A circle of bosses extending outwards is arranged on the circumference of the large end of the hollow truncated cone.

2. The special clip for lifting jack safety anchor according to claim 1, characterized in that: The connection between the upper smooth hole section of the inner cavity of the hollow frustum and the threaded teeth of the middle section is rounded.

3. The special clip for lifting jack safety anchor according to claim 1 or 2, characterized in that: The outer wall of the upper section of the hollow truncated cone is a cylindrical surface from the outer wall section below the boss.

4. The special clip for lifting jack safety anchor according to claim 1 or 2, characterized in that: The outer wall of the upper section of the hollow truncated cone is a conical surface with a larger upper part and a smaller lower part from the boss to the lower part.

5. The special clip for lifting jack safety anchor according to claim 3, characterized in that: The number of the clip bodies is three, which are rotationally symmetrically arranged.

6. The special clip for lifting jack safety anchor according to claim 4, characterized in that: The number of the clip bodies is three, which are rotationally symmetrically arranged.

7. The special clip for lifting jack safety anchor according to claim 3, characterized in that: The number of the clip bodies is two symmetrically arranged clip bodies.

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