JP2015033746A - Anchor drawing tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an anchor drawing tool having high durability, easy to use, and capable of suppressing production cost.SOLUTION: The anchor drawing tool of the invention comprises: a rod 2 coupled to an electric tool; a flange-shaped gripping member 4 attached to the rod 2; and a slip-prevention member 6 attached to the rod 2. The rod 2 has a cone press part 10, a male screw part 16 and a coupling part 14 in series. The gripping member 4 is rotatably attached to the rod 2. The slip-prevention member 6 is attached to a tip end side position of a position where the gripping member 4 is attached, on the rod 2.

Description

  The present invention relates to an anchor extractor.

  When attaching a construction scaffold or the like to a wall surface of a building, a cut anchor 50 as shown in FIG. 4 is used.

  The cut anchor 50 includes a cylindrical sleeve 52 penetrating both ends, and a cone 54 press-fitted into an opening on one end side of the sleeve 52.

  A plurality of slits 56 cut along the axial direction are formed on one end side of the sleeve 52. A female screw 58 into which an anchor bolt (not shown) is screwed is formed on the inner peripheral surface on the other end side of the sleeve 52.

  The cone 54 has a truncated cone shape that gradually decreases in diameter along the axial direction. The cone 54 is used by press-fitting the upper bottom side into the sleeve 52.

  To attach the cut anchor 50 to the wall surface 100, first, a hole is made in the wall surface 100 with a drill or the like. By inserting the cut anchor 50 into the hole from the cone 54 side and driving it with a hammer or the like, one end side of the sleeve 52 is expanded by the further press-fitting of the cone 54, and the cut anchor 50 is firmly fixed to the wall surface 100. The An anchor bolt is screwed into the fixed sleeve 52 from the outside.

  If the cut anchor 50 is left in the building after use, rust generated on the cut anchor 50 causes deterioration of the building. In order to avoid this, the cut anchor 50 may be taken out by scraping around the hole after use.

  However, the work of scraping the wall surface 100 and taking out the cut anchor 50 is troublesome and costly. Therefore, Patent Document 1 proposes an anchor extractor for extracting the cut anchor 50 from the hole.

  In this anchor extractor, a cylindrical holder is coupled to the sleeve 52 of the cut anchor 50, a rod is screwed into a through hole of the holder, and the cone 54 is pushed in at the tip of the rod, whereby the cone 54 and the sleeve 52 are separated. Let After the separation, the handle attached to the outer peripheral surface of the holder is grasped with both hands, and the sleeve 52 is pulled out from the hole integrally with the holder and the rod.

JP 2002-185425 A

  As described above, the conventional anchor extractor has a structure in which a cylindrical holder is provided and a rod is screwed into the holder. Therefore, the rod is formed to be long and easy to break when a load is applied. There was a problem of lack of durability.

  Also, after the holder is joined to the sleeve, the rod is screwed with a wrench, and then the handle is grasped with both hands, and the sleeve is pulled out together with the holder and the rod. Had.

  The present invention solves the above-mentioned problems, and an object thereof is to provide an anchor extractor that has high durability, is easy to use, and can be manufactured at a low cost.

  In order to solve the above problems, the present invention is an anchor extractor having the following configuration.

  The present invention is an anchor extractor for pulling out a cut anchor composed of a cylindrical sleeve and a cone press-fitted into the sleeve from a hole in the wall surface of the structure, the rod connected to an electric tool, and the rod A flange-shaped gripping member mounted on the rod, and a retaining member mounted on the rod. The rod is located between a first end located on one end side in the axial direction, a second end located on the other end side in the axial direction, and the first end and the second end. An intermediate shaft portion, the first end portion having a cone pressing portion that presses against the cone, the second end portion having a connecting portion connected to the electric tool, and the intermediate shaft portion And a male screw portion to be screwed into the sleeve. The gripping member is rotatably mounted on the intermediate shaft portion, and the retaining member is mounted on a side closer to the first end portion than a portion of the intermediate shaft portion where the gripping member is mounted.

  The anchor extractor of the present invention further includes a safety rope for preventing fall, and the safety rope has a first locking portion at one end in the axial direction and a second locking portion at the other end in the axial direction. Preferably, the gripping member has a through hole for locking the first locking portion.

  The present invention has an effect that it is possible to provide an anchor extractor having high durability, good usability, and low manufacturing cost.

It is a side view which shows the anchor extraction tool of one Embodiment of this invention. It is a front view which shows an anchor extraction tool same as the above. It is a perspective view which shows the use condition of an anchor extraction tool same as the above. It is a side view explaining the state where the cut anchor was fixed to the wall surface.

  The present invention will be described based on embodiments shown in the accompanying drawings.

  An anchor extractor according to an embodiment of the present invention is for quickly pulling out a cut anchor 50 as shown in FIG. 4 from a hole in a wall surface 100 into which the anchor is driven. That is, if the anchor extractor of this embodiment is used, the cylindrical sleeve 52 forming the cut anchor 50 can be easily pulled out together with the cone 54 press-fitted into this.

  As shown in FIG. 1 and FIG. 2, the anchor extractor of the present embodiment includes a metal rod 2 formed along a straight central axis, and a metal disc attached to the rod 2. And a retaining member 6 made of a metal nut that is also attached to the rod 2. In the following text, the direction along the central axis of the rod 2 is referred to as “axial direction”.

  A male screw 8 is formed on the outer peripheral surface of the rod 2. The male screw 8 is formed in a series on the outer peripheral surface of the rod 2 in a region excluding one end in the axial direction (the left end in FIG. 1). One end portion of the rod 2 that does not form the male screw 8 is a cylindrical cone pressing portion 10.

  At the other end portion in the axial direction of the rod 2 (right end portion in FIG. 1), a hex nut 12 is fixed to form a connecting portion 14 for connecting to the electric tool 40. A portion of the rod 2 between the cone pressing portion 10 and the connecting portion 14 becomes a male screw portion 16 having a male screw 8 provided on the outer peripheral surface.

  In other words, the rod 2 has the first end portion 18 on one end side in the axial direction, and the cone pressing portion 10 is provided on the first end portion 18. The rod 2 has a second end portion 20 on the other end side in the axial direction, and a connecting portion 14 is provided on the second end portion 20. The rod 2 has an intermediate shaft portion 22 between the first end portion 18 and the second end portion 20, and the male screw portion 16 is provided on the intermediate shaft portion 22.

  The holding member 4 is made of a metal disk having an insertion hole 24 in the center. The insertion hole 24 is a circular through hole formed so as to have a larger diameter than the male screw 8. The gripping member 4 is rotatably attached to the intermediate shaft portion 22 of the rod 2 by passing the male screw portion 16 through the clearance through the insertion hole 24.

  A through hole 26 different from the insertion hole 24 is formed in the vicinity of the outer peripheral edge of the grip member 4 provided in a flange shape on the rod 2. A ring 28 for locking a safety rope 32 (see FIG. 3) is passed through the through hole 26.

  The retaining member 6 includes a nut 30 having an internal thread formed on the inner peripheral surface. The female screw on the inner peripheral surface of the retaining member 6 has a size and shape to be screwed with the male screw 8. The outer diameter of the retaining member 6 is set larger than the diameter of the insertion hole 24 of the gripping member 4. The retaining member 6 is attached to a portion of the male screw portion 16 of the rod 2 that is closer to the cone pressing portion 10 than a portion to which the gripping member 4 is attached by screwing.

  The disc-shaped gripping member 4 is sandwiched in the axial direction between the retaining member 6 having an outer diameter larger than the insertion hole 24 and the connecting portion 14 having an outer diameter larger than the insertion hole 24. , Dropping off from the rod 2 is prevented.

  The safety rope 32 to be locked to the gripping member 4 has a first locking portion 34 at an end portion on one end side, and a second locking portion (not shown) at an end portion on the other end side. As the first locking part 34 and the second locking part, an appropriate structure such as a hook can be adopted.

  In the present embodiment, the first locking portion 34 formed of the hook member 36 is locked to the gripping member 4 via the ring 28, but the first locking portion 34 is not gripped via the ring 28. 4 may be directly locked. For example, a member similar to the hook member 36 is preferably used for the second locking portion (not shown), and by locking this to the operator's body, the anchor extractor can be prevented from falling.

  A method of extracting the cut anchor 50 from the wall surface 100 using the anchor extractor of the present embodiment is as follows.

  As shown in FIG. 3, the operator attaches the connecting portion 14 of the rod 2 to the output shaft of the electric tool 40, and the sleeve 2 of the cut anchor 50 that fixes the cone pressing portion 10 side of the rod 2 to the wall surface 100. 52 is inserted.

  The operator holds the handle (not shown) of the electric tool 40 with one hand and pulls the trigger switch provided on the handle while holding the holding member 4 with the other hand, and outputs the output shaft of the electric tool 40. Rotate. The rod 2 is rotationally driven integrally with the output shaft of the electric power tool 40, and the male screw portion 16 meshes with the female screw 58 of the sleeve 52, thereby screwing into the sleeve 52.

  When the rod 2 enters the sleeve 52 to some extent, the tip surface of the cone pressing portion 10 included in the rod 2 is pressed against the upper bottom surface of the cone 54. When the rod 2 is rotated and further screwed into the sleeve 52, the cone pressing portion 10 acts to move the cone 54 away from the sleeve 52. The sleeve 52 is pushed forward from the wall surface 100 by the reaction force at this time.

  When the sleeve 52 is pushed forward by a predetermined distance, the portion where the sleeve 52 has been expanded by the press-fitting of the cone 54 returns to its original state, and the fixation is released. Here, when the rod 2 is pulled out together with the electric tool 40 while holding the handle of the electric tool 40 with one hand and holding the gripping member 4 with the other hand, the cut anchor 50 screwed into the rod 2 is The cone 54 is extracted from the hole.

  The degree to which the fixing is released when the rod 2 is screwed into the sleeve 52 can be easily determined by attaching a mark such as a tape to the rod 2.

  The above-described procedure can be completed in a few seconds by a familiar operator, and a large number of cut anchors 50 can be extracted at a stroke on site. Moreover, since the cut anchor 50 can be extracted together with the cone 54, the cut anchor 50 can be reused.

  As described above with reference to the accompanying drawings, the anchor extractor of the present embodiment is configured so that the cut anchor 50 including the cylindrical sleeve 52 and the cone 54 press-fitted into the cylindrical sleeve 52 is removed from the hole in the wall surface 100 of the structure. It is for pulling out. The anchor extractor of the present embodiment includes a rod 2 connected to the electric tool 40, a flange-shaped gripping member 4 attached to the rod 2, and a retaining member 6 attached to the rod 2.

  The rod 2 includes a first end 18 located on one end side in the axial direction, a second end 20 located on the other end side in the axial direction, and a gap between the first end 18 and the second end 20. The intermediate shaft portion 22 is positioned. The first end portion 18 has a cone pressing portion 10 that presses against the cone 54. The second end portion 20 has a connecting portion 14 connected to the electric tool 40. The intermediate shaft portion 22 has a male screw portion 16 that is screwed into the sleeve 52.

  The grip member 4 is rotatably mounted on the intermediate shaft portion 22. The retaining member 6 is attached to the side closer to the first end portion 18 than the place where the grip member 4 of the intermediate shaft portion 22 is attached.

  According to the anchor extractor of the present embodiment, the rod 2 has a highly durable structure in which the cone pressing portion 10, the male screw portion 16, and the connecting portion 14 are formed in series. Further, if the rod 2 is mounted on the electric tool 40 and rotated, the fixing of the cut anchor 50 to the wall surface 100 can be easily and quickly released, and the whole components can be reduced. Costs can be reduced.

  Furthermore, the anchor extractor of the present embodiment includes a safety rope 32 for preventing the fall. The safety rope 32 has a first locking portion 34 at one end in the axial direction and a second locking portion at the other end in the axial direction. The gripping member 4 has a through hole 26 that locks the first locking portion 34.

  Therefore, according to the anchor extractor of the present embodiment, if the second locking portion of the safety rope 32 is locked to the worker's body or the like, the flange-shaped gripping member 4 attached to the rod 2 and this The anchor extractor can be prevented from falling via the safety rope 32. Since the gripping member 4 is rotatable with respect to the rod 2, it is possible to work by rotating the rod 2 while connecting the safety rope 32 to the gripping member 4 to prevent the gripping member 4 from falling.

  As mentioned above, although this invention was demonstrated based on embodiment shown to an accompanying drawing, this invention is not limited to the said embodiment. Within the range intended by the present invention, appropriate design changes can be made.

2 Rod 4 Holding member 6 Retaining member 10 Cone pressing part 14 Connecting part 16 Male thread part 18 First end part 20 Second end part 22 Intermediate shaft part 26 Through hole 32 Safety rope 34 First locking part 40 Electric tool 50 Cut anchor 52 Sleeve 54 Cone 100 Wall surface

Claims (2)

An anchor extractor for pulling out a cut anchor comprising a cylindrical sleeve and a cone press-fitted into the sleeve from a hole in the wall surface of the structure,
A rod connected to the power tool;
A flange-shaped gripping member attached to the rod;
A retaining member attached to the rod,
The rod is
A first end located on one end side in the axial direction; a second end located on the other end side in the axial direction; an intermediate shaft located between the first end and the second end; The first end portion has a cone pressing portion that presses against the cone, the second end portion has a connecting portion connected to the power tool, and the intermediate shaft portion has the sleeve. Having a male threaded part
The gripping member is
The intermediate shaft is rotatably mounted,
The retaining member is
An anchor extractor that is attached to a side closer to the first end portion than a portion of the intermediate shaft portion to which the gripping member is attached. Further equipped with a safety rope to prevent falling,
The safety rope is
It has a first locking part at one end in the axial direction and a second locking part at the other end in the axial direction,
The gripping member is
The anchor extractor according to claim 1, further comprising a through hole for locking the first locking portion.

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