KR20060068559A - Hook for inner fixing device in tensioning member removed ground anchor - Google Patents

Abstract

According to the present invention, when the external fixing of the tension member is released, the fast wedge assembly of the fast wedge assembly and the fastening of the hook and the tension member are secured to the front end of the tension member without release of the cap without opening the rear end of the tension member. It is to provide a hook for the internal fixing of the tension member removal ground anchor that has all the advantages of the horn screw to reposition the tip of the tension member when the wedge assembly is advanced by twisting and twisting in the reverse fastening direction. In the hook of the locking device for the internal fixing of the tension member removal type ground anchor locking the retracted wedge assembly by the gear catching on the locking jaw of the cap by the reaction force at the same time as it is released, the locking edge given at the tip of the hook The external fixation of the tension member is released by converting it into a spiral of about 1 pitch. When the wedge assembly is quickly retracted and locked due to the reaction force of the liver tension member, especially when the wedge assembly is retracted and locked undesirably, when the back end of the tension member is held and turned in the reverse fastening direction, the wedge assembly is released from the screw hole of the cap. It is characterized by a hook for an internal fixture of a tension removal type ground anchor that allows the retraction to advance and retract so that the tip of the tension member can be simply reset on the wedge assembly without opening the cap.

Description

Hook for inner fixing device in tensioning member removed ground anchor}             

1 is a perspective view of a hook having a spiral hook

Figure 2 is a longitudinal cross-sectional view

Figure 3 is a longitudinal sectional view of the internal fixing for the ground anchor with the hook embedded

4 is a longitudinal cross-sectional view of the hook is locked in the cap in FIG.

FIG. 5 is a scene view when unlocking the hook by twisting the tension member in the reverse tightening direction in FIG. 4; FIG.

<Description of the symbols for the main parts of the drawings>

10: hook 11: shaft

12: curtain 13: chin

14: spiral hanging blade 20: wedge

30: wedge assembly 31: jaw groove

According to the present invention, when the external anchorage of the tension member is released, the tension member is retracted by the reaction force corresponding to the anchoring load, so that the wedge assembly in the internal fixture is retracted together in one step so that the wedge bite (settlement) of the tension member is released. This invention relates to a hook-type locking device for the internal anchor of the ground anchor, which increases the reliability of removing the tension member by preventing the wedge assembly from coming off when removing the tension member. The present invention relates to a hook for internal fixing of a tension member-removable ground anchor capable of fixing.

Utility model registration No. 242474, developed in advance by the present inventors, has a hook-type means for locking a wedge assembly with a wedge assembly in which a wedge bite is released by a tension member whose external fixing is released. It is often found that the internal anchors for ground anchors with retracted wedge assembly locking hooks are also unintentionally released and the wedge assembly locks onto the locking jaws of the cap. Such unauthorized release of the tension member and unauthorized retraction and locking of the retracted wedge assembly may be caused by impacts during loading and unloading of the assembled ground anchors, and bumps and bumps on the road surface during transportation to the site at a short distance. The main causes are vibrations and shocks received when passing through the ground, and impacts due to collisions with the anchor holes when entering the ground anchor holes.

If, for whatever reason, the hook is unintentionally locked in the cap, external manipulation of the tension member will hardly unlock the wedge assembly. Open the cap, which is attached to the wedge, to lift the locking means, and use a tool such as a pair of pliers to reduce the hook to get out of the catch. This is also possible when the internal fixture is on the ground and not in the state of being inserted into the anchor hole. Unlocking hooks on the ground is not that easy either. This is because it is not difficult to shrink the hook by entering the ring-shaped locking jaw deep inside the cap. This is the main reason why the internal fixture with hooks as locking means for the retracted wedge assembly is not activated.

In this regard, if the wedge assembly is locked to the cap because the wedge assembly is unlocked by an internal fixing body having a hook that locks the retracted wedge assembly to the cap, the wedge assembly can be locked by simply grasping the trailing end of the tension member. It is necessary to improve the structure of the hook to release the state so that the front end of the tension member can be reset and the activation of the internal fixing body for the tension member removal ground anchor having the hook-type locking means.

On the other hand, there is also an internal fixing body for the tension material removal type ground anchor, the locking means for the wedge assembly is a horn screw, such as Patent Nos. 411567 and 43069 and Utility Model Registration No. 249170 by the inventor. When the inner fixing body is released and the external fixing to the tension member is released, the outer end of the tension member is held and turned to the direction where the screw is tightened, and the horn screw is engaged with the screw hole of the cap to pull the wedge assembly and wedge the end of the tension member. Release the wedge assembly and lock the wedge assembly by itself. If the wedge bite to the tip of the tension member is released, hold the rear end of the tension member and turn it to the reverse direction. While it is possible to relocate the tip of the tension member by retracting, the release of the wedge bite by the wedge assembly can be slowed down several times, and the working time until the wedge bite is released is relatively long. As a result, the removal efficiency of the tension member is low.

In this regard, the horn screw locking means needs to shorten the working time of releasing the wedge bite to the tip of the tension member in order to increase the removal efficiency of the tension member.

Accordingly, an object of the present invention is to provide a fast wedge assembly with a fast wedge assembly when the external fixation of the tension member is released when the anchoring of the hook and the tension member as a locking means for the retracted wedge assembly, which is a strong advantage when released Hook for internal fixer of a tension member-removable ground anchor that has the advantage of a horn screw, a locking means for a retracted wedge assembly that can hold the trailing end of the tension member from the outside of the internal fixture without twisting the cap and twist in the reverse fastening direction It is about.

The problem is that the hook of the lock for the internal fixing member of the tension member-removable ground anchor which locks the retracted wedge assembly by gearing into the locking jaw of the cap by the reaction force at the same time that the external fixation to the rear end of the tension member is released. In the wedge assembly, the wedge assembly is quickly retracted and locked by the reaction force of the tension member at the moment when the external fixation of the tension member is released by converting the engaging blade given at the tip of the hook into a spiral of about one pitch, and the retraction and locking of the wedge assembly is performed. The hook is configured to hold the rear end of the tension member and turn it in the reverse fastening direction, and the spiral locking edge is released from the screw hole formed in the cap, and the wedge assembly is advanced to simply reposition the tip of the tension member in the wedge assembly without opening the cap. Can be achieved with

1 and 2, the hook 10 as a locking means for the retracted wedge assembly which locks the retracted wedge assembly to the locking jaw of the cap to prevent the wedge assembly from accompanying the tension member when the tension member is removed later, In addition to the film 12 formed inside the shaft 11 and the jaw 13 formed at the rear end, the spiral engaging blade 14 formed at the tip of the shaft 11 is characterized.

The hook 10 is reduced in diameter when the external pressure is acted on by the slits 15, which are formed in the longitudinal direction on the shaft 11, and has an elasticity restored to the state before the reduction when the external pressure disappears. The membrane 12 retracts the tension member toward the tip by the reaction force corresponding to the anchoring load when cutting the rear end of the tension member inserted into the external anchorage installed on the earth wall construction stake to remove the tension member from the installed ground anchor. It is a reaction force transmission means to pull the wedge assembly in the internal fixture in the process.

Spiral locking blade 14 is the best alternative means for overcoming the problems of conventional non-helical locking blades. That is, as mentioned above, even if the non-helical locking blade of the hook as in the prior art, even if the locking screw hole for the locking blade is formed, it is difficult to release the lock state once caught in the screw hole. However, even when the spiral locking blade 14 is locked by the screw hole of the cap, when turned in the reverse fastening direction, the bolt easily escapes as if the bolt is pulled out of the nut.

The higher the number of pitches, the more the number of pitches of the helical engaging blade 13 is, the slower the retraction and the slower escape from the screw hole are. A spiral of less than one pitch may cause posture instability of the hook 10 due to incomplete engagement with the threaded hole. Therefore, the pitch of the spiral locking edge 14 is preferably one pitch.

3 illustrates an internal fixture in which a hook 10 having a spiral locking edge 14 is incorporated. In order to be as shown in the example, the assembly in the following order. First, the jaw 13 of the hook 10 is inserted into the jaw groove 31 of the wedge assembly 30, and the front end of the tension member 40 is provided with the tension hole 22 drilled in the center of the rear end of the wedge tube 20. Inserted and sandwiched between the wedge assembly 30. At this time, the tip of the tension member 40 abuts the membrane 14. It sits in the wedge container 20 in this state. Next, the cap 23 in which the screw hole 24 was formed is fastened to the front end of the wedge cylinder 21. Reference numeral 32 is an O-ring for maintaining the assembled state fitted to the outer end portion of the wedge assembly 30. 4 shows the changed state when the fixing load loaded on the tension member 40 is released at the site where the internal fixing body is applied. When the external fixation to the rear end of the tension member 40 is released, the tension member 40 is bounced toward the cap 23 by the reaction force corresponding to the tension force applied to the tension member 40. As the tension member 40 is thrown off, the membrane 12 is pushed. The force pushed by the membrane 12 is transmitted to the wedge assembly 30 via the jaw 13 of the hook 10, and the wedge assembly 30 is led to the force. The wedge assembly 30 is opened as the membrane 12 is attracted, thereby releasing the wedge bite, i.e., internal fixation, to the tip of the tension member 40. As shown in FIG. At this time, the spiral engaging blade 14 of the hook 10 is retracted elastically by the difference between the end diameter of the spiral locking blade 14 and the hole diameter of the screw hole 24 while entering the screw hole 24 (helical locking blade ( The rear end of 14) is elastically opened and caught at the moment when it exits the tip of the screw hole 24. Pulling the rear end of the tension member 40 in the state in which the internal fixing is released as it is released.

As described above, when the tension member 40 is normally removed, the time taken to lock the cap as compared to the conventional horn screw locking means is made as quickly as a hook having a conventional non-helical locking blade.

When the wedge assembly 30 is retracted abnormally, the settlement of the tip of the tension member 40 is released and the hook 10 is locked to the cap 23 so that the tip of the tension member 40 needs to be reset. As shown in FIG. 5, the rear end of the tension member 40 is held and turned in the reverse fastening direction (arrow direction). The helical locking edge 14 then exits from the screw hole 24 as if the bolt is missing from the nut. The wedge assembly 30 is re-advanced by the force transmitted through the jaw 13 as the helical engaging blade 14 exits the screw hole 24 in this way, and in this process, each wedge piece of the wedge cylinder 20 While retracting in the center direction will be to reset the tip of the tension member 40 is released.

As described above, the hook having the helical hooking edge of the present invention is not intended, but the wedge assembly is retracted to release the fixation on the tip of the tension member, and when the hook is locked to the cap, the hook is held without the cap and the rear end of the tension member is held in reverse direction. By simply rotating, the front end of the tension member can be reset by simply unlocking and advancing the wedge assembly by the hook.

When this is applied to the tension member removal type internal fixing body having a conventional horn screw locking means, the tension member removal time is shortened since the external fixation of the tension member is quickly caught and locked like a hook. Is provided.

Claims (2)

A hook for internal fixing of a tension member-removable ground anchor having a jaw fitted into a jaw groove of a wedge assembly and a membrane for reaction force transmission of a tension member whose external slitting has been released on a given axis for elasticity in a longitudinal direction. A hook for an internal fixing member of a tension member-removable ground anchor, wherein a spiral engaging blade is formed at the tip. The hook for internal fixation of claim 1, wherein the helical engaging blade has a pitch of 1 pitch.

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