JP7016193B1 - Extraction tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drawing tool capable of quickly and easily pulling out a core rod driving type anchor bolt. SOLUTION: In a pulling tool 1, a first holding portion 20 for holding a core rod 101 of a core rod driving type anchor bolt 100 and a first holding portion 20 are connected to each other, and a pulling force for pulling out the core rod 101 is applied. A shaft portion 10 that is transmitted to the core rod 101 via the holding portion 20 is provided. The shaft portion 10 includes a connecting portion 14 to which the first holding portion 20 can be connected, a shaft portion 11 connected to the connecting portion 14, a movable portion 12 slidable along the shaft portion 11, and a movable portion. It has a flange portion 13 that is hit by the collar portion 12, and a pulling force is generated by hitting the collar portion 13 with the movable portion 12. [Selection diagram] Fig. 1

Description

The present invention relates to a drawing tool for pulling out a core rod driving type anchor bolt.

Conventionally, various "post-installed anchor bolts" have been used to fix fixed objects such as structural members or equipment to hardened concrete. This "post-installed anchor bolt" is fixed to a perforation provided in concrete, and for example, a core rod driving type anchor bolt is known. The core rod driving type anchor bolt is mainly composed of an anchor bolt body, a core rod inserted into the center of the anchor bolt body, and a nut screwed into the anchor bolt body.

This core rod driving type anchor bolt is fixed by inserting the anchor bolt body into the drilling and then driving the core rod into the center of the anchor bolt body using a driving tool such as a hook bolt. Specifically, in the anchor bolt body, the expansion piece formed at the tip of the anchor bolt body is radially expanded from the inside by driving the core rod, and bites into the inner wall in the drilling. As a result, the core rod driving type anchor bolt is fixed in the drilling.

By the way, in general, when moving or removing an object to be fixed, or when there is a core rod driven anchor bolt fixed at an incorrect position, the unnecessary core rod driven anchor bolt is removed. There is a need to. However, it is not easy to pull out the core rod driven anchor bolt once fixed in the drilling. Therefore, in order to remove unnecessary core rod driven anchor bolts, for example, a method of cutting the core rod driven anchor bolts protruding from the inside of the drill using an electric cutting tool such as a sander, or a dedicated method. A method of shearing a core rod driven anchor bolt protruding from the inside of a drill using a shearing tool, and a method of forcibly removing a core rod driven anchor bolt from the inside of a drill using a tool such as a bar. It is used.

However, it has been pointed out that the above-mentioned cutting or shearing method may lead to various problems because the anchor bolt body remains in the perforation. For example, in the perforation in which the anchor bolt body remains, cracks such as cracks or cracks occur. This crack makes it easy for rainwater and air to enter the inside of the concrete, which causes corrosion of the reinforcing bar inside the concrete. Corrosion of the reinforcing bar not only generates rust juice, which will be described later, but also reduces the durability of the structure itself made of concrete.

Further, as the corrosion of the reinforcing bar progresses, the reinforcing bar itself expands in volume, causing an explosion that causes the concrete to burst from the inside. When this explosion occurs, the concrete easily peels off as concrete pieces, which may lead to an accident due to the collapsed concrete pieces.

Further, for example, the anchor bolt body remaining in the perforation and the reinforcing bar inside the concrete corrode to generate rust juice. This rust juice flows out from the perforations and cracks and becomes rusty, which spoils the aesthetic appearance of the concrete surface.

Further, when the anchor bolt body remains in the perforation, the remaining portion may not fit in the perforation and may protrude from the surface of the concrete. In such a case, the worker may get caught in the protruding portion and cause a fall.

On the other hand, in the above-mentioned removal method, the anchor bolt body, which is not easy to pull out, is forcibly pulled out by force, so that the removal work may lead to an unexpected accident.

Therefore, in order to reliably pull out the core rod driving type anchor bolt fixed in the perforation, for example, an anchor pulling tool has been proposed (Patent Document 1).

JP-A-2018-08709

Generally, in order to easily pull out the core rod driven anchor bolt, it is first necessary to separate the anchor bolt body and the core rod from each other in the core rod driven anchor bolt fixed in the drilling.

Therefore, the above-mentioned anchor extraction tool has a bolt-shaped extraction member that holds the head of the core rod at the tip, a main body member that accommodates the extraction member in the internal space, and a nut-like member that is attached to the rear end of the extraction member. It has a moving member and. The drawn member is housed in the main body member, and the rear end portion is exposed to the outside from the insertion hole formed in the top portion of the main body member. A moving member is screwed and attached to the rear end portion exposed to the outside, and the moving member is rotated and tightened until it comes into contact with the top portion of the main body member.

The procedure for pulling out the core rod of the core rod driving type anchor bolt using the anchor extraction tool assembled as described above is to move with a wrench or the like while holding the head of the core rod with the tip of the extraction member. Rotate the member in the tightening direction. Then, the drawn member housed in the main body member starts to move relatively in the direction away from the anchor bolt main body as the moving member rotates. As a result, the core rod held by the extraction member moves in a direction away from the anchor bolt main body together with the extraction member, and finally the anchor bolt body and the core rod are separated from each other. The anchor bolt body from which the core rod has been pulled out can be easily pulled out from the drilling.

That is, the above-mentioned anchor pulling tool pulls out the core rod by using the screws provided on each of the pulling member and the moving member and screwing each other. In other words, the core rod is pulled out by converting the rotary motion of the moving member into the linear motion of the pulling member. Therefore, for example, even if the moving member is rotated once, the drawing member moves only a distance corresponding to the pitch of the screw, and in order to pull out the core rod, the moving member must be rotated a considerable number of times. Therefore, it takes a lot of time and effort for the operator who wants to quickly remove the core rod driving type anchor bolt.

Further, when rotating the moving member, it is necessary to tighten it with a fastening tool such as a spanner or a wrench, so that it is not always convenient for the operator.

Therefore, there is a demand for the realization of a drawing tool capable of quickly and easily pulling out a core rod driving type anchor bolt. An object of the present invention is to provide a drawing tool for solving the above-mentioned problems of the prior art.

The extraction tool according to the present invention is a extraction tool for pulling out a core rod driving type anchor bolt, and has a first holding portion for holding the core rod of the core rod driving type anchor bolt and the first holding portion. The shaft portion is provided with a shaft portion for transmitting the pulling force for pulling out the core rod to the core rod via the first holding portion, and the shaft portion is a connecting portion to which the first holding portion can be connected. A shaft portion connected to the connecting portion, a movable portion slidable along the shaft portion, and a flange portion hit by the movable portion. It is characterized in that the pulling force is generated by striking.

In the extraction tool according to the present invention, the first holding portion includes a cylindrical main body member having one end connected to the connecting portion and provided with a fitting hole from the other end toward the one end side. A cylindrical pushing member that is screwed into the gripping member that is fitted into the fitting hole from the other end side and the outer peripheral side surface of the other end side that pushes the gripping member toward the one end side and fits into the fitting hole. And, with
The gripping member has a base portion arranged on one end side and a plurality of claw pieces provided from the base portion toward the other end side, and is fitted into the fitting hole to be fitted. The tip of the claw piece is narrowed to grip the head of the core rod.

In the extraction tool according to the present invention, the gripping member has a cylindrical shape, and is formed in a reverse taper shape in which the outer diameter increases from the base portion to the tip portion, and the fitting hole is the maximum of the gripping member. It is characterized in that it is formed smaller than the outer diameter.

The extraction tool according to the present invention is a extraction tool for pulling out a core rod driving type anchor bolt, and has a second holding portion for holding the anchor bolt main body of the core rod driving type anchor bolt and the second holding portion. A shaft portion that is connected to the anchor bolt body and transmits the pulling force for pulling out the anchor bolt body to the anchor bolt body via the second holding portion, and the shaft portion can be connected to the second holding portion. It has a connecting portion, a shaft portion connected to the connecting portion, a movable portion slidable along the shaft portion, and a flange portion hit by the movable portion. It is characterized in that the pull-out force is generated by striking the collar portion.

The extraction tool according to the present invention is characterized in that the second holding portion has a tubular shape, and a bolt holding screw screwed to the anchor bolt main body is formed on the inner peripheral side surface.

In the extraction tool according to the present invention, the movable portion has a cylindrical shape through which the shaft portion is passed, and the grip portion that can be gripped by an operator is connected to the grip portion and has an outer diameter larger than that of the grip portion. It is characterized by having a large hammer portion.

The extraction tool according to the present invention is a extraction tool for pulling out the core rod driving type anchor bolt, and the first holding portion for holding the core rod of the core rod driving type anchor bolt is connected to the first holding portion. It is provided with a shaft portion that transmits the pulling force for pulling out the core rod to the core rod via the first holding portion. The shaft portion includes a connecting portion to which the first holding portion can be connected, a shaft portion connected to the connecting portion, a movable portion slidable along the shaft portion, and a flange portion hit by the movable portion. , And generate a pulling force by hitting the collar with the movable part. Therefore, since the pulling force can be generated only by hitting the flange part by the movable part, it is not necessary to use a fastening tool such as a spanner or a wrench, and the core rod of the core rod driving type anchor bolt can be easily pulled out. can. Further, since the rotation work using a fastening tool is not required when pulling out the core rod, the core rod driving type anchor bolt can be quickly pulled out.

Further, in the extraction tool according to the present invention, the first holding portion has a cylindrical main body member in which one end side is connected to the connecting portion and a fitting hole is provided from the other end to the one end side, and the other end. It includes a gripping member that is fitted into the fitting hole from the side, and a cylindrical pushing member that is screwed into the outer peripheral side surface on the other end side and pushes the gripping member toward one end side to fit into the fitting hole. The grip member has a base portion arranged on one end side and a plurality of claw pieces provided from the base portion toward the other end side, and by fitting the grip member into the fitting hole, the claw piece is fitted. The tip of the core is narrowed and grips the head of the core rod. Therefore, the core rod of the core rod driving type anchor bolt can be reliably held only by fitting the gripping member into the fitting hole.

Further, in the extraction tool according to the present invention, the gripping member has a cylindrical shape and is formed in a reverse taper shape in which the outer diameter increases from the base portion to the tip portion. Further, the fitting hole is formed to be smaller than the maximum outer diameter of the gripping member. Therefore, the tip portion is narrowed and the core rod of the core rod driving type anchor bolt can be held by simply fitting the gripping member into the fitting hole.

Further, the extraction tool according to the present invention is a extraction tool for pulling out the core rod driving type anchor bolt, and has a second holding portion for holding the anchor bolt main body of the core rod driving type anchor bolt and a second holding portion. A shaft portion is provided, which is connected to the portions and transmits the pulling force for pulling out the anchor bolt main body to the anchor bolt main body via the second holding portion. The shaft portion includes a connecting portion to which the second holding portion can be connected, a shaft portion connected to the connecting portion, a movable portion slidable along the shaft portion, and a flange portion hit by the movable portion. , And generate a pulling force by hitting the collar with the movable part. Therefore, since the pulling force can be generated only by hitting the flange portion by the movable portion, it is not necessary to use a fastening tool, and the bolt of the core rod driving type anchor bolt can be easily pulled out. Further, since the rotation work using a fastening tool is not required when pulling out the bolt, the core rod driving type anchor bolt can be quickly pulled out.

Further, in the extraction tool according to the present invention, the second holding portion has a tubular shape, and a bolt holding screw, which is a female screw screwed to the anchor bolt main body, is formed on the inner peripheral side surface. Therefore, it is possible to reliably hold the anchor bolt body of the core rod driving type anchor bolt.

Further, in the extraction tool according to the present invention, the movable portion has a cylindrical shape through which a shaft portion is passed, and the grip portion that can be gripped by an operator is connected to the grip portion and has an outer diameter larger than that of the grip portion. It has a large hammer part. Therefore, when the operator pulls out the core rod or the anchor bolt main body of the core rod driving type anchor bolt by using the extraction tool according to the present invention, the flange portion is hit by the hammer portion while grasping the grip portion. be able to. That is, the collar portion can be hit reliably and strongly. Further, by adding the weight of the hammer portion at the time of hitting, it is possible to hit the collar portion more strongly than in the case where the hammer portion is not provided. Therefore, a larger pulling force can be generated as compared with the case where the hammer portion is not provided.

It is a front view which shows the whole image of the drawing tool of 1st Embodiment which concerns on this invention. A procedure for pulling out a core rod driven anchor bolt using the extraction tools of the first embodiment and the second embodiment according to the present invention is shown, and (a) is a core rod driven anchor bolt. The figure which shows the state which covered the extraction tool of the first embodiment from above on the upper part, (b) held the head of the core rod of the core rod driving type anchor bolt by the extraction tool of the first embodiment. A cross-sectional view showing a state, (c) is a cross-sectional view showing a state in which the core rod of the core rod driving type anchor bolt is pulled out by the extraction tool of the first embodiment, and (d) is a cross-sectional view of the second embodiment. A cross-sectional view showing a state in which the anchor bolt main body of the core rod driving type anchor bolt is held by the drawing tool, (e) shows that the anchor bolt main body of the core rod driving type anchor bolt is pulled out by the drawing tool of the second embodiment. It is sectional drawing which shows the state. It is a front view which shows the shaft part in the extraction tool of the 1st embodiment and the extraction tool of the 2nd embodiment which concerns on this invention. It is a front view which shows the 1st holding part in the drawing tool of 1st Embodiment which concerns on this invention. It is sectional drawing which shows the 1st holding part in the drawing tool of 1st Embodiment which concerns on this invention. It is a top view which shows the main body member of the 1st holding part in the drawing tool of 1st Embodiment which concerns on this invention. It is a front view which shows the main body member of the 1st holding part in the drawing tool of 1st Embodiment which concerns on this invention. It is a side view which shows the state which the main body member of the 1st holding part in the drawing tool of 1st Embodiment which concerns on this invention is seen from the right. FIG. 6 is a cross-sectional view taken along the line IX-IX of FIG. 6 and is a cross-sectional view showing a main body member of a first holding portion in the drawing tool of the first embodiment according to the present invention. It is a perspective view which shows the state which the gripping member of the 1st holding part in the drawing tool of 1st Embodiment which concerns on this invention is seen from the upper right. It is a perspective view which shows the state which the gripping member of the 1st holding part in the drawing tool of 1st Embodiment which concerns on this invention is seen from the front upper side. It is a top view which shows the gripping member of the 1st holding part in the drawing tool of 1st Embodiment which concerns on this invention. It is a front view which shows the gripping member of the 1st holding part in the drawing tool of 1st Embodiment which concerns on this invention. FIG. 12 is a cross-sectional view taken along the line XIV-XIV of FIG. 12, which is a cross-sectional view showing a gripping member of a first holding portion in the drawing tool of the first embodiment according to the present invention. FIG. 12 is a cross-sectional view taken along the line XV-XV of FIG. 12, which is a cross-sectional view showing a gripping member of a first holding portion in the drawing tool of the first embodiment according to the present invention. It is a top view which shows the pushing member of the 1st holding part in the drawing tool of 1st Embodiment which concerns on this invention. It is a front view which shows the pushing member of the 1st holding part in the drawing tool of 1st Embodiment which concerns on this invention. FIG. 16 is a cross-sectional view taken along the line XVIII-XVIII of FIG. 16 and is a cross-sectional view showing a pushing member of a first holding portion in the drawing tool of the first embodiment according to the present invention. It is a top view which shows the 2nd holding part in the drawing tool of 2nd Embodiment which concerns on this invention. It is a front view which shows the 2nd holding part in the drawing tool of the 2nd Embodiment which concerns on this invention. FIG. 19 is a cross-sectional view taken along the line XXI-XXI of FIG. 19 showing a second holding portion of the drawing tool according to the second embodiment of the present invention.

Hereinafter, the first embodiment according to the present invention will be described with reference to the drawings.
FIG. 1 is a front view showing an overall image of a drawing tool 1 according to the first embodiment of the present invention. In the following description, for convenience, the X direction will be described as the left-right direction, the Y direction as the vertical direction, and the Z direction as the front-back direction.

The drawing tool 1 is made of metal and is used for pulling out the core rod 101 (see FIG. 2B) of the core rod driving type anchor bolt 100. The drawing tool 1 includes a shaft portion 10 that generates a pulling force for pulling out the core rod 101, and a first holding portion 20 that is connected to the shaft portion 10 (see FIG. 1).

As shown in FIGS. 1 and 3, the shaft portion 10 has a cylindrical shaft portion 11 whose axial direction is the vertical direction, and a movable portion 12 through which the shaft portion 11 is passed and slidable in the vertical direction. And have. Further, the shaft portion 10 includes a flange portion 13 provided at the upper end of the shaft portion 11 to receive a hit by the movable portion 12, and a connecting portion 14 formed at the lower end of the shaft portion 11 to which the first holding portion 20 is connected. , Is equipped.

The shaft portion 11 is a columnar shaft member whose axial direction is the vertical direction. The shaft portion 11 has male threads formed on the outer peripheral side surface of the upper end and the outer peripheral side surface of the lower end. The male screw at the upper end is the upper screw 11A, and the flange portion 13 is fixed. Further, the lower end screw 11B, which is a male screw at the lower end, is a connecting portion 14 to which the first holding portion 20 is connected.

The movable portion 12 has a cylindrical shape with the vertical direction as the axial direction, and a movable portion shaft hole 12A which is a circular hole penetrating the movable portion 12 is formed in the center. The inner diameter of the movable portion shaft hole 12A is formed to be slightly larger than the outer diameter of the shaft portion 11, and the shaft portion 11 is passed through the movable portion shaft hole 12A. Therefore, the movable portion 12 can slide between the flange portion 13 and the connecting portion 14 of the shaft portion 10.

Further, the movable portion 12 is composed of three portions having different outer diameters. Specifically, the movable portion 12 includes a hammer portion 12B having a large outer diameter provided at the upper portion, and a connecting portion 12C which is connected to the lower end of the hammer portion 12B and whose outer diameter is narrowed downward. It is composed of a grip portion 12D which is connected to the lower end of the connecting portion 12C and has a smaller outer diameter than the hammer portion 12B.

The hammer portion 12B is a portion for striking the flange portion 13, and has a large difference between the outer diameter and the inner diameter, and is formed with a thickness. Further, the connecting portion 12C is a portion for smoothly connecting the hammer portion 12B and the grip portion 12D having different outer diameters, and is R-processed in a reverse taper shape from the upper part to the lower part. The grip portion 12D is a portion to be gripped by the operator when using the extraction tool 1, the difference between the outer diameter and the inner diameter is small, and the thickness is thinner than that of the hammer portion 12B. A striking surface 12E formed on a flat surface is provided at the upper end of the hammer portion 12B. The striking surface 12E is provided so as to face the striking receiving surface 13D of the flange portion 13, which will be described later.

The flange portion 13 has a cylindrical shape with the vertical direction as the axial direction, and a flange portion shaft hole 13A, which is a circular hole penetrating the flange portion 13, is formed at the center thereof. A fixing screw 13B, which is a female screw screwed to the upper end screw 11A of the shaft portion 11, is formed on the inner peripheral side surface of the flange portion shaft hole 13A. The flange portion 13 is fixed to the upper end of the shaft portion 11 by inserting the upper end of the shaft portion 11 from below the flange portion shaft hole 13A and screwing the upper end screw 11A into the fixing screw 13B.

Further, the flange portion 13 is provided with a striking receiving portion 13C at the lower end of the flange portion 13 in order to receive a striking by the hammer portion 12B of the movable portion 12. The impact receiving portion 13C is an annular flange that radiates from the lower end of the flange portion 13 toward the periphery, and is formed to have a thickness in the vertical direction. The impact receiving portion 13C is formed to have the same outer diameter as the hammer portion 12B. Further, the hitting receiving portion 13C has a lower end formed on a flat surface, and is provided with a hitting receiving surface 13D facing the hitting surface 12E of the hammer portion 12B.

Subsequently, the first holding portion 20 will be described.
In the following description, the "one end" of the main body member 30 in the first holding portion 20 means the upper end, and the "other end" of the main body member 30 means the lower end.

As shown in FIGS. 4 and 5, the first holding portion 20 is composed of three members. Specifically, the main body member 30 connected to the shaft portion 10, the gripping member 40 fitted into the fitting hole 31 provided in the main body member 30, and the gripping member 40 connected to the main body member 30 and pushed in. It is composed of a pushing member 50 to be fitted into the fitting hole 31 and.

As shown in FIGS. 6, 7, 8 and 9, the main body member 30 has a cylindrical shape with the vertical direction as the axial direction, and the main body member shaft hole is a circular hole penetrating the main body member 30 in the center. 30A is provided. The main body member shaft hole 30A is composed of holes that play two roles, and the upper side of the main body member shaft hole 30A is a first connecting hole 30B connected to the connecting portion 14, and is below the main body member shaft hole 30A. The side is a fitting hole 31 into which the gripping member 40 is fitted.

The first connecting hole 30B is formed from one end of the main body member 30 downward to slightly below the center of the main body member 30. The inner diameter of the first connecting hole 30B is formed to be slightly larger than the outer diameter of the connecting portion 14 of the shaft portion 10. Further, a first connecting screw 30C, which is a female screw screwed into the connecting portion 14, is formed on the inner peripheral side surface of the first connecting hole 30B. Therefore, the main body member 30 is connected to the shaft portion 10 by inserting the connecting portion 14 into the first connecting hole 30B from one end side of the main body member 30 and screwing the first connecting screw 30C and the connecting portion 14. can do.

The fitting hole 31 is connected to the lower end of the first connecting hole 30B, and is formed from slightly below the center of the main body member 30 to the other end of the main body member 30. The fitting hole 31 is composed of two holes having different shapes. Specifically, the cylindrical hole 31A, which is a columnar hole connected to the lower end of the first connecting hole 30B, and the columnar hole 31A. It is composed of a fitting hole 31B which is a truncated cone-shaped hole connected to the lower end of the main body member 30 and formed so that the inner diameter increases toward the other end of the main body member 30. That is, the fitting hole 31 is formed as a funnel-shaped hole in which the other end side of the main body member 30 is opened. The maximum inner diameter of the fitting hole 31B is formed to be smaller than the maximum outer diameter of the claw portion 40B of the gripping member 40 described later.

Further, on the outer peripheral side surface of the main body member 30 on one end side, a flat surface 30D for a fastening tool having a flat end portion in the left-right direction is provided. The fastening tool flat surface 30D is provided for fitting a fastening tool (not shown) such as a spanner or a wrench when connecting the main body member 30 to the connecting portion 14. Further, an outer peripheral screw 30E, which is a male screw, is formed on the outer peripheral side surface on the other end side of the main body member 30. The push-in screw 50B of the push-in member 50, which will be described later, is screwed into the outer peripheral screw 30E.

As shown in FIGS. 10, 11, 12, 14, and 15, the grip member 40 has a cylindrical shape with the vertical direction as the axial direction, and is formed so as to be able to be fitted into the fitting hole 31. There is. Specifically, the gripping member 40 has a cylindrical base 40A formed at the upper portion and a truncated cone shape formed in a reverse taper shape so that the outer diameter becomes larger from the lower end to the lower side of the base 40A. It is composed of a claw portion 40B and a claw portion 40B. The grip member 40 is fitted into the fitting hole 31 by arranging the base 40A on one end side of the main body member 30 and pushing the grip member 40 from the other end side toward the one end side of the main body member 30 (see FIG. 5). ).

Further, the outer diameter of the base portion 40A is formed to be slightly smaller than the inner diameter of the cylindrical hole 31A of the fitting hole 31. Therefore, when the gripping member 40 is fitted into the fitting hole 31, the base 40A is formed so as to fit in the cylindrical hole 31A (see FIG. 5).

When the grip member 40 is fitted into the fitting hole 31, the shape of the truncated cone of the claw portion 40B is pushed into the fitting hole 31B. Specifically, the claw portion 40B is provided with grinds 40C at four locations around the claw portion 40B at equal intervals (see FIG. 12). The grind 40C is provided from the lower end of the base portion 40A to the lower end of the claw portion 40B, and the claw portion 40B is divided into four parts. The four-divided claw portion 40B becomes four claw pieces 40D, and when the gripping member 40 is fitted into the fitting hole 31, the tip portion 40E, which is the tip, is formed so as to narrow toward the axial center side. ..

Further, the maximum outer diameter of the claw portion 40B, that is, the maximum outer diameter of the truncated cone shape composed of the four claw pieces 40D is formed to be larger than the maximum inner diameter of the fitting hole 31B (see FIG. 5). Therefore, when the gripping member 40 is fitted into the fitting hole 31, the claw portion 40B is pushed into the fitting hole 31B, and the tip portions 40E of the four claw pieces 40D are narrowed toward the axial center. The claw portion 40B fits into the fitting hole 31B.

Further, in the nail piece 40D, a protrusion piece 40F is formed on the inner peripheral side surface of the tip portion 40E so as to project in the axial direction. In the first holding portion 20, the core rod 101 of the core rod driven anchor bolt 100 is gripped by the protrusion piece 40F (see FIG. 2B). Specifically, the protrusion piece 40F bites into the upper end of the core rod main body 101A of the core rod 101, so that the head portion 101B of the core rod 101 can be gripped. The lower end of the tip portion 40E is formed as a plane perpendicular to the axis of the gripping member 40, and is provided with a contact surface 40G that abuts on the annular push piece 50C of the push member 50 described later.

Further, the base end portion 40H, which is the end portion of the ground portion 40C on the base portion 40A side, is processed into a circular hole shape. That is, the split 40C is formed in the shape of a cassotte in which one linear groove projects downward from the base end portion 40H, which has a circular hole shape when viewed from the side (FIGS. 10 and 10). 15). Thereby, as compared with the case where the base end portion 40H is not circular, the force applied to the base end portion 40H can be dispersed when the force is applied to the nail piece 40D. Therefore, it is possible to prevent the nail piece 40D from being chipped or bent.

As shown in FIGS. 16, 17, and 18, the pushing member 50 has a columnar shape whose axial direction is the vertical direction, and a pushing member shaft hole 50A which is a circular hole penetrating the pushing member 50 is provided at the center. Has been done. The inner diameter of the push-in member shaft hole 50A is formed to be slightly larger than the outer diameter of the main body member 30. Further, a push screw 50B, which is a female screw screwed to the outer peripheral screw 30E, is formed on the inner peripheral side surface of the push member shaft hole 50A. Therefore, by screwing the push-in screw 50B and the outer peripheral screw 30E, the push-in member 50 can be connected to the other end side of the main body member 30.

Further, the pushing member 50 is provided with an annular pushing piece 50C perpendicular to the axis of the pushing member 50 so as to close the pushing member shaft hole 50A at the lower end thereof. The annular push piece 50C is the tip of the grip member 40 when the grip member 40 is inserted into the fitting hole 31 of the main body member 30 and the push member 50 is connected to the other end side of the main body member 30 from above. It is formed so as to face the contact surface 40G in the portion 40E and abut on the contact surface 40G. Therefore, when the gripping member 40 is fitted into the fitting hole 31, the pushing member 50 is tightened toward one end side of the main body member 30 with the annular pushing piece 50C and the contact surface 40G in contact with each other. By inserting the grip member 40, the grip member 40 is pushed into one end side of the main body member 30 and fitted into the fitting hole 31.

The annular push piece 50C has a bolt insertion hole 50D, which is a circular hole, formed in the center thereof, and the anchor bolt main body 102 of the core rod driving type anchor bolt 100 is formed so as to be insertable (FIG. 2 (FIG. 2). b) See). Further, since the bolt insertion hole 50D is formed to be smaller than the outer diameter of the claw portion 40B in the narrowed state, the grip member 40 does not insert the bolt insertion hole 50D.

Further, the pushing member 50 is provided with a fastening tool flat surface 50E having end portions in the front-rear direction and the left-right direction formed on a flat surface at the upper portion thereof. The fastening tool flat surface 50E is provided for fitting the fastening tool when the pushing member 50 is connected to the main body member 30.

The configuration of the extraction tool 1 has been described above.
Subsequently, the second embodiment according to the present invention will be described with reference to the drawings.

19, FIG. 20, and FIG. 21 are a plan view, a front view, and a cross-sectional view showing a second holding portion 60 in the drawing tool 2 according to the second embodiment of the present invention, respectively. Like the extraction tool 1, the extraction tool 2 includes a shaft portion 10, and the connecting portion 14 of the shaft portion 10 has a second holding portion 60 instead of the first holding portion 20 of the extraction tool 1. Be concatenated. Therefore, in the following, the second holding portion 60 having a configuration different from that of the drawing tool 1 will be described.

The second holding portion 60 is made of metal and is connected to the shaft portion 10 and used to pull out the anchor bolt main body 102 (see FIG. 2D) of the core rod driven anchor bolt 100. .. The second holding portion 60 is a cylindrical member whose axial direction is the vertical direction, and a second holding portion shaft hole 60A, which is a central hole penetrating the second holding portion 60, is provided at the center. A flat surface 60B for a fastening tool is provided on the outer peripheral side surface of the second holding portion 60 on the upper end side so that the end portions in the left-right direction are formed in a flat surface. The fastening tool flat surface 60B is provided for fitting the fastening tool when the second holding portion 60 is connected to the connecting portion 14.

The second holding portion shaft hole 60A is composed of a hole that plays two roles. The upper side of the second holding portion shaft hole 60A is the second connecting hole 60C connected to the connecting portion 14, and the lower side of the second holding portion shaft hole 60A is the anchor bolt main body of the core rod driving type anchor bolt 100. It is a bolt hole 60D for holding 102.

The second connecting hole 60C is formed from the upper end of the second holding portion 60 downward to slightly below the center of the second holding portion 60. The inner diameter of the second connecting hole 60C is formed to be slightly larger than the outer diameter of the connecting portion 14 of the shaft portion 10. Further, a second connecting screw 60E, which is a female screw screwed into the connecting portion 14, is formed on the inner peripheral side surface of the second connecting hole 60C. Therefore, the second holding portion 60 can be connected to the shaft portion 10 by inserting the connecting portion 14 from above the second connecting hole 60C and screwing the second connecting screw 60E and the connecting portion 14. can.

The bolt hole 60D is connected to the lower end of the second connecting hole 60C, and is formed from slightly below the center of the second holding portion 60 to the lower end of the second holding portion 60. The bolt hole 60D is formed to be slightly larger than the outer diameter of the anchor bolt main body 102 of the core rod driven anchor bolt 100. Further, on the inner peripheral side surface of the bolt hole 60D, a bolt holding screw 60F, which is a female screw to be screwed into the bolt screw 102B (see FIG. 2D) of the anchor bolt main body 102, is formed. Therefore, by screwing the bolt screw 102B into the bolt holding screw 60F, the second holding portion 60 can reliably hold the anchor bolt main body 102.

The configuration of the extraction tool 2 has been described above.
Subsequently, the configuration of the core rod driven anchor bolt 100 to be pulled out by using the pulling tool 1 and the pulling tool 2 according to the present invention will be described with reference to FIGS. 2 (a) and 2 (b).

FIG. 2A shows a state in which the first holding portion 20 of the extraction tool 1 is covered from above the core rod driving type anchor bolt 100. 2 (b) is a cross-sectional view showing a state in which the core rod driving type anchor bolt 100 and the first holding portion 20 are cut along the vertical direction in the state of FIG. 2 (a).

The core rod driving type anchor bolt 100 includes a core rod 101, an anchor bolt main body 102, and a nut 103 (see FIG. 2B).

The core rod 101 is a nail-shaped member extending in the vertical direction, and has a rod-shaped core rod main body 101A and a head portion 101B provided at the upper end of the core rod main body 101A. The core rod 101 is inserted into the through hole 102A penetrating the anchor bolt main body 102 from above the anchor bolt main body 102 except for the head 101B.

The anchor bolt main body 102 is a cylindrical member whose axial direction is the vertical direction, and a through hole 102A is formed in the center thereof. The anchor bolt main body 102 is formed with a bolt screw 102B, which is a male screw into which a nut 103 is screwed, on the outer peripheral side surface of the upper portion. Further, in the anchor bolt main body 102, an expansion split 102D is formed at the lower end portion 102C, which is the lower end portion (see FIG. 2A). The portion provided with the expansion slit 102D is an expansion piece 102E that expands radially toward the direction away from the core rod 101 by driving the core rod 101 into the through hole 102A (FIG. 2 (b). )reference). When the expansion piece 102E bites into the concrete, the core rod driving type anchor bolt 100 is firmly fixed in the drilling.

The nut 103 is a cylindrical member whose axial direction is the vertical direction, and a nut screw 103A, which is a female screw screwed into the bolt screw 102B of the anchor bolt main body 102, is formed on the inner peripheral side surface thereof.

The configuration of the core rod driving type anchor bolt 100 has been described above.
Next, a procedure for pulling out the core rod driving type anchor bolt 100 using the pulling tool 1 and the pulling tool 2 will be described with reference to FIGS. 2 (a) and 2 (e).

First, in the first holding portion 20, the gripping member 40 is inserted into the fitting hole 31 of the main body member 30 from the base 40A side, and the pushing member 50 is lightly screwed to the other end side of the main body member 30 from above. , Assemble the first holding portion 20 (not shown). As shown in FIGS. 2 (a) and 2 (b), the first holding portion 20 in this state is the anchor bolt body 102 of the core rod driven anchor bolt 100 exposed to the outside of the drilling (P). Put it on the top. At this time, the upper part of the anchor bolt main body 102 of the core rod driving type anchor bolt 100 is passed through the bolt insertion hole 50D of the pushing member 50, and further, the core rod 101 is inserted between the protrusions 40F of the claw piece 40D of the gripping member 40. It is assumed that the head 101B is inserted.

Next, with the head 101B inserted between the protrusions 40F, the pushing member 50 is tightened, and the pushing member 50 is advanced to one end side of the main body member 30. Then, the gripping member 40 is pushed into the fitting hole 31B while narrowing the claw portion 40B toward one end side of the main body member 30, and is fitted into the fitting hole 31. Eventually, in the gripping member 40 fitted in the fitting hole 31, the tip portion 40E of the claw piece 40D is in a narrowed state, and the protrusion piece 40F is the lower end of the head 101B and the upper end of the anchor bolt body 102. Get in between. Then, the protrusion piece 40F bites into the upper end of the core rod body 101A, so that the head portion 101B is gripped by the tip portion 40E (see FIG. 2B). When tightening the pushing member 50, a fastening tool may be used to grip and tighten the outer peripheral side surface of the pushing member 50.

Next, the shaft portion 10 is connected to the first holding portion 20 in a state where the head portion 101B is gripped by the tip portion 40E (see FIG. 2C). Specifically, the connecting portion 14 of the shaft portion 10 is inserted into the first connecting hole 30B of the main body member 30 in the first holding portion 20, and the connecting portion 14 is screwed into the first connecting screw 30C.

Subsequently, with the first holding portion 20 connected to the connecting portion 14, the grip portion 12D is gripped and the movable portion 12 is slid (not shown). At this time, the movable portion 12 slides with momentum in the direction in which the core rod 101 is pulled out (the direction indicated by the arrow W in FIG. 2C) from the state in which the core rod 101 is brought close to the core rod 101. By doing so, the flange portion 13 is strongly hit by the hammer portion 12B, and a pulling force for pulling out the core rod 101 can be generated.

At that time, in the shaft portion 10, the pulling force generated by hitting the flange portion 13 is transmitted to the first holding portion 20 via the shaft portion 11. Further, the pulling force is transmitted to the core rod 101 via the first holding portion 20. As a result, the core rod 101 can be separated from the anchor bolt main body 102 (see FIG. 2C). If the core rods 101 do not separate at one time, the flange portion 13 is hit by the hammer portion 12B a plurality of times.

After that, the anchor bolt main body 102 having no urging force to spread the expansion piece 102E by separating the core rod 101 can be pulled out from the drilling (P) relatively easily. Further, the anchor bolt main body 102 is pulled out by using the pulling tool 2 according to the following procedure.

First, as shown in FIG. 2D, the anchor bolt main body 102 with the core rod 101 separated is covered with the second holding portion 60 to hold the anchor bolt main body 102. Specifically, the anchor bolt main body 102 is inserted into the bolt hole 60D of the second holding portion 60, and the bolt screw 102B of the anchor bolt main body 102 is screwed into the bolt holding screw 60F. As a result, the anchor bolt main body 102 can be reliably held by the second holding portion 60. It is preferable that the nut 103 screwed into the bolt screw 102B in advance is removed from the anchor bolt main body 102.

Next, as shown in FIG. 2 (e), the shaft portion 10 from which the first holding portion 20 has been removed is connected to the second holding portion 60. Specifically, the connecting portion 14 of the shaft portion 10 is inserted into the second connecting hole 60C of the second holding portion 60, and the connecting portion 14 is screwed into the second connecting screw 60E.

Subsequently, with the shaft portion 10 connected to the second holding portion 60, the movable portion 12 is slid and the flange portion 13 is hit by the hammer portion 12B in the same manner as when the core rod 101 is separated. (Not shown). As a result, the pulling force for pulling out the anchor bolt main body 102 is transmitted to the anchor bolt main body 102 via the shaft portion 11 and the second holding portion 60, and the anchor bolt main body 102 can be pulled out from the drilling (P) (FIG. 2). See (e).).

If the fixing into the drilling (P) is unstable and the core rod driving type anchor bolt 100 can be pulled out without separating the core rod 101, the extraction tool 1 should be used. Instead, it is also possible to pull out the core rod driving type anchor bolt 100 in which the core rod 101 is driven by using the drawing tool 2.

The procedure for pulling out the core rod driving type anchor bolt 100 has been described above.
Next, the effects of the extraction tool 1 and the extraction tool 2 will be described.

The drawing tool 1 can pull out the core rod 101 only by hitting the flange portion 13 with the movable portion 12 in a state where the core rod 101 is held by the first holding portion 20. Therefore, it is not necessary to use a fastening tool, and the core rod 101 can be easily pulled out. Further, since the rotation work using the fastening tool is not required when the core rod 101 is pulled out, the core rod driving type anchor bolt 100 can be quickly pulled out.

Further, in the first holding portion 20 of the extraction tool 1, the tip portion 40E of the claw piece 40D is narrowed by fitting the gripping member 40 into the fitting hole 31, and the protrusion piece 40F of the tip portion 40E is used as a core rod. The head 101B of 101 can be gripped (see FIG. 2B). Further, when the gripping member 40 is fitted into the fitting hole 31, the gripping member 40 can be fitted into the fitting hole 31 by tightening the pushing member 50 to one end side of the main body member 30. Therefore, the gripping member 40 can be easily fitted into the fitting hole 31, and the core rod 101 can be reliably held.

Further, the gripping member 40 of the extraction tool 1 is formed in a reverse taper shape in which the outer diameter increases from the base portion 40A to the tip portion 40E, and the fitting hole 31 is smaller than the maximum outer diameter of the gripping member 40. It is formed. Therefore, the tip portion 40E of the claw piece 40D is narrowed and the core rod 101 can be held only by fitting the gripping member 40 into the fitting hole 31.

Further, the extraction tool 2 includes a second holding portion 60 connected to the shaft portion 10 instead of the first holding portion 20. Therefore, the anchor bolt main body 102 can be pulled out only by hitting the flange portion 13 with the movable portion 12 in a state where the anchor bolt main body 102 with the core rod 101 separated is held by the second holding portion 60. Therefore, it is not necessary to use a fastening tool, and the anchor bolt main body 102 can be easily pulled out. Further, since the rotation work using the fastening tool is not required when the anchor bolt main body 102 is pulled out, the core rod driving type anchor bolt 100 can be quickly pulled out.

Further, the second holding portion 60 of the extraction tool 2 is formed with a bolt holding screw 60F screwed to the bolt screw 102B of the anchor bolt main body 102 on the inner peripheral side surface thereof. Therefore, the anchor bolt main body 102 can be easily and surely held.

Further, in the extraction tool 1 and the extraction tool 2, the movable portion 12 has a grip portion 12D that can be gripped by an operator, and a hammer portion 12B having an outer diameter larger than that of the grip portion 12D. Therefore, when the operator pulls out the core rod 101 or the anchor bolt main body 102, he / she can grip the grip portion 12D and hit the flange portion 13 with the hammer portion 12B. That is, the collar portion 13 can be reliably and strongly hit.

Further, since the weight of the hammer portion 12B is added at the time of hitting, the flange portion 13 can be hit more strongly than in the case where the hammer portion 12B is not provided. Therefore, a larger pulling force can be generated as compared with the case where the hammer portion 12B is not provided. Further, since the hammer portion 12B having an outer diameter larger than that of the grip portion 12D is provided, when the flange portion 13 is hit, the hand of the operator who grips the grip portion 12D has the hitting surface 12E and the hit receiving surface. It will not be caught between the 13D and the accident can be prevented.

As described above, the embodiments according to the present invention have been described in detail, but the present invention is not limited to the above embodiments. The present invention can be modified in various ways as long as it does not deviate from the matters described in the claims.

For example, in the present embodiment, the extraction tool 1 provided with the first holding portion 20 and the extraction tool 2 provided with the second holding portion 60 are shown, but the extraction tool 2 provided with both the first holding portion and the second holding portion is shown. It may be used as a tool. In that case, a first holding portion is provided at one end of the shaft portion, a second holding portion is provided at the other end portion of the shaft portion, and two flange portions are provided so as to sandwich the movable portion. , Any of the flanges may be configured to be able to be hit by a movable portion.

Further, in the present embodiment, the configuration including the movable portion 12 through which the shaft portion 11 is passed through the center and the flange portion 13 fixed to the shaft portion 11 is shown, but the collar portion is accurately hit by the movable portion. The shaft portion, the movable portion, and the flange portion may be provided separately as long as they can be configured.

Further, in the present embodiment, the gripping member 40 has the claw portion 40B formed in the shape of a truncated cone, and the fitting hole 31 has the fitting hole 31B in the shape of a truncated cone, but the gripping member is fitted. It suffices as long as the tip of the gripping member is narrowed so that the core rod can be gripped when it is fitted into the joint hole. It may be composed of a hole.

Further, in the present embodiment, the configuration is shown in which the protrusion piece 40F of the tip portion 40E of the gripping member 40 is made to bite into the upper end of the core rod body 101A to hold the head portion 101B of the core rod 101. As long as the 101 can be reliably held, for example, the head 101B may be sandwiched and held by the tip of the gripping member, such as a tool such as pliers.

Further, in the present embodiment, the bolt holding screw 60F is formed on the inner peripheral side surface of the second holding portion 60, but if the structure is such that the anchor bolt main body 102 can be held, for example, the first The anchor bolt main body 102 may be gripped by a claw piece, such as the holding portion 20.

Further, in the present embodiment, the structure in which the hammer portion 12B and the grip portion 12D are provided on the movable portion 12 is shown, but the shape of the movable portion is arbitrary as long as it can hit the collar portion. For example, the movable portion may be a cylindrical member, and a handle portion that protrudes from the cylindrical member and can be gripped by an operator may be provided.

Further, in the present embodiment, the grind 40C is provided at four places and four claw pieces 40D are formed, but the number of grinds and claw pieces is arbitrary.

1 Extraction tool 2 Extraction tool 10 Shaft part 11 Shaft part 11A Upper end screw 11B Lower end screw 12 Movable part 12A Movable part Shaft hole 12B Hammer part 12C Connecting part 12D Grip part 12E Strike surface 13 Knife part 13A Kneck part Shaft hole 13B Impact receiving part 13D Impact receiving surface 14 Connecting part 20 First holding part 30 Main body member 30A Main body member Shaft hole 30B First connecting hole 30C First connecting screw 30D Flat surface for fastening tool 30E Outer peripheral screw 31 Fitting hole 31A Cylindrical hole 31B Fitting Grip 40A Grip member 40A Base 40B Claw 40C Split 40D Claw piece 40E Tip 40F Protrusion piece 40G Contact surface 40H Base end 50 Push member 50A Push member Shaft hole 50B Push screw 50C Circular push piece 50D Bolt insertion hole 50E Flat surface for fastening tool 60 Second holding part 60A Second holding part Shaft hole 60B Flat surface for fastening tool 60C Second connecting hole 60D Bolt hole 60E Second connecting screw 60F Bolt holding screw 100 Core rod driving type anchor bolt 101 Core rod 101A Core rod body 101B Head 102 Anchor bolt body 102A Through hole 102B Bolt screw 102C Lower end 102D Expansion piece 102E Expansion piece 103 Nut 103A Nut screw P Drilling W Pulling out direction X Left and right direction Y Up and down direction Z Front and back direction

Claims (5)

It is a pulling tool for pulling out the core rod driving type anchor bolt.
The first holding portion that holds the core rod of the core rod driving type anchor bolt and the first holding portion are connected, and the pulling force for pulling out the core rod is applied to the core rod via the first holding portion. Equipped with a shaft part that transmits
The first holding portion has a main body member provided with a fitting hole, and a gripping member that is narrowed by being fitted into the fitting hole to grip the core rod.
The shaft portion is hit by a connecting portion to which the first holding portion can be connected, a shaft portion connected to the connecting portion, a movable portion slidable along the shaft portion, and the movable portion. With a collar,
When the collar portion is hit by the movable portion by the operator, the pulling force is generated and the core rod is pulled out.
A drawing tool characterized by that. The first holding portion has a cylindrical main body member having one end side connected to the connecting portion and provided with a fitting hole from the other end toward the one end side, and the first holding portion fitted from the other end side. The gripping member to be fitted into the fitting hole and a cylindrical pushing member screwed to the outer peripheral side surface on the other end side to push the gripping member toward the one end side and fit into the fitting hole are provided.
The gripping member has a base portion arranged on one end side and a plurality of claw pieces provided from the base portion toward the other end side, and is fitted into the fitting hole to be fitted. The tip of the claw piece is narrowed to grip the head of the core rod.
The extraction tool according to claim 1. The gripping member has a cylindrical shape, and is formed in a reverse taper shape in which the outer diameter increases from the base portion to the tip portion.
The fitting hole was formed to be smaller than the maximum outer diameter of the gripping member.
The extraction tool according to claim 2. It is a pulling tool for pulling out the core rod driving type anchor bolt.
The second holding portion that holds the anchor bolt main body of the core rod driving type anchor bolt and the second holding portion are connected, and the pulling force for pulling out the anchor bolt main body is applied to the anchor via the second holding portion. Equipped with a shaft part that transmits to the bolt body,
The second holding portion has a cylindrical shape, and a bolt holding screw screwed to the anchor bolt body is formed on the inner peripheral side surface.
The shaft portion is hit by a connecting portion to which the second holding portion can be connected, a shaft portion connected to the connecting portion, a movable portion slidable along the shaft portion, and the movable portion. With the collar,
When the flange portion is hit by the movable portion by the operator, the pulling force is generated and the anchor bolt main body is pulled out.
A drawing tool characterized by that. The movable portion has a cylindrical shape through which the shaft portion is passed, and has a grip portion that can be gripped by an operator, and a hammer portion that is connected to the grip portion and has an outer diameter larger than that of the grip portion. ,
The extraction tool according to any one of claims 1 to 4, wherein the extraction tool is characterized in that.

Images