JP3780488B2 - Cylindrical drill for removing concrete chips in peekons - Google Patents

Description

  The present invention relates to a cylindrical drill that cuts and removes a concrete core that has entered into a pykon when concrete is placed and is completely clogged and solidified.

  Conventional wrench for attaching and detaching a cone is provided with a concrete blade removing tooth portion that cuts and removes the solid (noro) that has entered and solidified into the pekon (or just the cone) when placing the wrench and concrete. Some are used (for example, see Patent Document 1).

  Moreover, there exists what formed the sawtooth-shaped tooth | gear part on the front-end | tip end surface of the cylindrical wrench main body of the cone wrench for which this applicant applied (refer patent document 2).

  Japanese Utility Model Publication No. 07-015268   JP 2001-180862 A

  Conventionally, after removing the concrete formwork, the cone is removed using a rotating tool (usually using an electric impact driver). Is very hard and must be removed before the pecon is removed, which removes the concrete slab and removes it from the concrete wall in order to reuse the pecon. It was necessary to remove it in good condition as much as possible.

  Therefore, the above-described conventional tools for removing the blades of Patent Document 1 and Patent Document 2 have been proposed and used. However, the concrete blades that have entered the inside of the pykon and completely clogged and solidified are very hard and are removed by cutting. At times, the electric impact driver had to be pushed in forcefully, and because the burden on the arm was large, the fatigue was severe, the workability was poor and the work could not be done efficiently.

  In addition, the above-mentioned concrete surface is hard and the cutting teeth often slip, which causes severe wear of the cutting teeth and exhaustion of the battery of the electric impact driver, and also causes a failure of the peakon such as deformation at the time of removal, Improvement was desired.

  Furthermore, in order to prevent deformation of the formwork, in order to prevent deformation of the formwork, a large number of concrete walls are usually attached, so it is desirable to remove them quickly when removing many of them. It was.

  In addition, there are concrete pouches that have infiltrated the inside of the pekon, those that are not, those that can be removed relatively easily, and those that are very hard and cannot be removed easily. Conventionally, it has not been supported and has performed inefficient work, and therefore, there has been a wide demand for a cutting tool for removing concrete debris with good workability and low fatigue.

  The present invention provides a cylindrical drill in which a connecting portion is provided on the proximal end side of a cylindrical drill body, and a tooth portion is formed at the distal end of the cylindrical drill body as a means for effectively achieving the above-described problems. In addition, by providing a screw portion that is screwed into the cylindrical drill main body corresponding to the support screw portion at the tip of the peakon support bolt, it can be removed without applying a pushing force. It is also possible to remove the concrete paste inside the peacon easily with little.

In the present invention, an effective effect can be obtained by each of the above-described means, and in particular, a cylindrical shape in which a connecting portion is provided on the proximal end side of the cylindrical drill body and a tooth portion is formed at the distal end of the cylindrical drill body. Since the drill is provided with a screw portion that is screwed into the predetermined depth end in the cylindrical drill body corresponding to the support screw portion at the tip of the peakon support bolt,
By rotating the threaded part itself, the cylindrical drill itself moves forward, and the rotation and advance force make it possible to cut and remove the concrete inside of the pykon. In addition, there is no feeling of fatigue as in the prior art, and the work efficiency is increased, so that the cost can be reduced.

In addition, the defective rate at the time of removing the pecon is lowered, the reuse rate is increased, the wear due to the cutting teeth slipping is less, and the battery of the electric impact driver is less consumed, thereby reducing the cost.
From these facts, the present invention has a remarkable effect in practical use.

  An embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, reference numeral 1 denotes a cylindrical drill main body, which has a bottomed cylindrical drill portion 2 and a base end side end face center. Is provided with a rod-like fitting connection portion 3, which is a hexagonal rod shape corresponding to the inner angle of a toothed cylindrical wrench body 9 (FIG. 5) connected to an electric impact driver 4 described later. , There is held directly fitted.

  Further, as shown in FIGS. 1 and 2, the cylindrical drill portion 2 includes a serrated blade portion formed with a screw portion 5 at the center of the inner back end face and protruding from the tip end face of the cylindrical drill portion 2. 6 is provided.

  The saw-toothed blade portion 6 is formed in a saw-tooth shape having cutting teeth 7, 7,... Whose front side is cut off at a substantially right angle and clearance angles 8, 8,. Forms four places.

  First, as shown from the construction state at the time of placing concrete in FIG. 3, the mold 11 on the concrete wall 10, the foam tie 12 that holds the mold 11, the separator bolt 14 and the peakon 13 that are supported from the inside of the mold 11, FIG. 5 shows a state in which the concrete core 15 that has been infiltrated and solidified when the concrete is placed is clogged in the inside of the pekon 13, and first the form tie 12 and the mold 11 are removed and the mold is removed as shown in FIG. 5. The work of removing the peakon 13 on the surface of the concrete wall 10 is performed.

  Further, as shown in FIG. 4, the peakon 13 is connected to the threaded portion at the tip of the separator bolt 14 and connected to the support bolt 16 and the tip of the support bolt 16 so as to protrude from the inside of the peakon 13. A detachable hexagonal head 18 is formed inside the base end side with a support screw portion 17.

  First, as shown in FIG. 4, the cylindrical drill body 1 is fitted and connected to the inside of a toothed cylindrical wrench body 9 which is connected and fixed to an electric impact driver 4 and which is removed from a conventional concrete blade and removed from a pykon. The part 3 is directly fitted and held.

  In this state, as shown in FIG. 5, the cylindrical drill portion 2 is inserted into the tip of the support screw portion 17 of the support bolt 16 protruding from the inside of the peakon 13, and the support screw portion 17 and the screw are inserted. The cylindrical drill body 1 is rotated by the electric impact driver 4 so that the portion 5 is screwed.

  By the rotation, the support screw portion 17 of the support bolt 16 is screwed into the screw portion 5 on the back end face of the cylindrical drill main body 1 inserted in a fitting manner, and thereby the cylindrical drill main body 1 rotates. However, the concrete noro 15 solidified inside the pekon 13 is rotated and removed by the sawtooth blade portion 6 by the advancement.

  Then, when the tip of the support screw portion 17 of the support bolt 16 comes into contact with the back of the screw portion 5 on the back end surface of the cylindrical drill portion 2, the electric impact driver 4 is reversely rotated to support the support screw of the support bolt 16. The cylindrical drill body 2 is released from the portion 17.

  Thereafter, the cylindrical drill main body 1 directly fitted and held on the toothed cylindrical wrench main body 9 connected to the conventional electric impact driver 4 is removed, and the toothed cylindrical wrench main body 9 removes the inside of the peaker 13. The hex head 18 for removal is rotated and loosened, and the pecon 13 is removed from the concrete wall 10 and used for reuse.

  Furthermore, in the situation of the peacon 13 on the surface of the concrete wall 10, the concrete noro 15 enters the inside of the pecon 13 and is completely clogged, the one that is not, and the one that can be removed relatively easily, In response to the situation that it is hard and cannot be easily removed, tools for removing or removing tools can be easily replaced and changed, and used as a cutting tool that is simple and very efficient.

  Note that the shape of the serrated blade portion 6 of the cylindrical drill body 2 may be appropriately changed and used regardless of the shape, but the illustration is omitted.

  In addition, a hexagonal bar-like connecting part thinner than that is provided in the center of the end face side of the fitting connecting part 3 and directly gripped by the electric impact driver 4 so as to remove the concrete noro 15 of the pecon 13 substantially as described above. Although it is preferable to use it, the illustration is omitted.

  It is a front perspective view of the Example of this invention.   It is a side view of the Example of this invention.   3 is a side cross-sectional view showing a construction state of the concrete wall 10. FIG.   It is side surface sectional drawing which shows the use condition of this invention.   It is side surface sectional drawing which shows the use condition of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylindrical drill main body 2 Cylindrical drill part 3 Fitting connection part 5 Screw part 6 Serrated blade part 16 Support bolt 17 Support screw part

Claims (1)

  In the cylindrical drill having a connecting portion provided on the proximal end side of the cylindrical drill body and having a tooth portion formed at the distal end of the cylindrical drill body, the distal end of the peakon support bolt is disposed at a predetermined rear end in the cylindrical drill body. A cylindrical drill for removing concrete glue inside a pykon, wherein a screw part is provided for screwing corresponding to a support screw part.

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