JP2021000715A - Expanding tool for expansion type anchor - Google Patents

Abstract

To provide a tool by which a work for opening and deforming an expansion portion can easily and accurately be performed in an expansion type anchor that is inserted into a bottom hole from one direction.SOLUTION: As one aspect, an expanding tool 13 is composed of a body 14 and a bolt (a push member) 15 spirally engaged with this. In a leading end of the body 14, a U-shaped engagement portion 18 is formed that attaches to/detaches from an end of an anchor body 2 from a lateral direction. The anchor body 2 has a male screw portion 5 and an expansion portion 7. A work piece is pressed and fixed against a surface of the anchor body 2 by a nut 4 screwed onto the anchor body 2. Because an expanding pin 3 can be moved forward by a power driver, load on a worker can remarkably be reduced. Because centering can be facilitated, bend or damage of the expanding pin 3, resulting from oblique striking, can also be prevented.SELECTED DRAWING: Figure 1

Description

The present invention relates to an expansion tool used for an expansion anchor of a type in which an expansion portion is expanded by an expansion pin.

Expandable anchors are used to secure members to hollow steel members or to stony construction parts such as concrete. As this expansion type anchor, a type in which an expansion pin having a tapered tip is driven in and the expansion pin is expanded by the tip of the expansion pin is widely used.

In this type of expandable anchor, the worker hits the expansion pin with a hammer at the construction site, but there is a problem that swinging the heavy hammer many times imposes a heavy burden on the worker. In particular, when working on site with scaffolding or working at high places using stepladders, the burden on the worker is doubled because the worker must swing the hammer while paying attention to his own stability. Will be done.

Therefore, a driving method that does not use a hammer has been considered, and as an example, Patent Document 1 discloses that a dedicated head is attached to the tip of a drill hammer and an expansion pin is driven through the head.

Japanese Unexamined Patent Publication No. 8-28526

By the way, in the driving work using a hammer, diagonal driving in which the moving direction of the hammer and the axis of the expansion pin deviate from each other is likely to occur, and the expansion pin is often bent, resulting in a driving failure. Since it is difficult to pay attention to the operation of the hammer, the diagonal striking phenomenon is likely to occur. However, even in Patent Document 1, it depends on the operator's intuition to align the axis of the hammer drill with the axis of the anchor body. Therefore, it has not been possible to prevent diagonal striking.

In addition, if a power driver or impact wrench can be used to drive the expansion pin, the working environment can be greatly improved in terms of vibration and noise, but Patent Document 1 lacks flexibility because only impact type hammer drills can be used. I have to say.

The present invention has been made in the wake of such a situation, and an object of the present invention is to provide an expansion tool for an expandable anchor which is excellent in reducing the burden on the operator, working efficiency, and working quality.

The invention of the present application is
"It has an anchor body having an expansion portion on one end side and an expansion pin having a portion inserted into the anchor body, and when the expansion pin is pushed toward the expansion portion side, the expansion portion is released. It spreads and deforms and is held so that it will not come out of the construction part. "
Regarding the expansion tool used for the expansion anchor with the configuration.

Then, in claim 1, this expansion tool is
"A pushing member for pushing the expansion pin and a regulating unit for holding the anchor body so as not to move forward when pushing the pushing member are provided, and the pushing member is attached to the regulating unit so as to be relatively movable. "
It is configured as.

Regarding the function of the regulation unit, "holding the anchor body so that it does not move forward when the pushing member is pushed in" means that the anchor body is held so that it cannot move forward because the regulation unit is in contact with the surface of the construction portion. It includes both the mode in which the anchor body is held in a non-advanced manner even when there is a gap between the regulation unit and the surface of the construction portion.

Further, "the push member is attached to the regulation unit so as to be relatively movable" means that it is sufficient that the push member is attached to the regulation unit in the construction state, and the push member is required before and after the construction. Also includes a configuration that can be removed from the regulatory unit. That is, the push member may be in a state where it can be attached to the regulation unit.

The invention of the present application can be developed in various ways. As an example, in claim 2, claim 1
"While the anchor body has a male screw portion exposed from the construction surface,
The regulation unit includes a body having an engaging portion formed in the male threaded portion of the anchor body from the lateral direction orthogonal to the male threaded portion, and the engaging portion is fitted into the male threaded portion from the lateral direction. Has an incision groove that allows
The engaging portion is held immovably by a nut screwed into the male threaded portion, or the engaging portion is fitted into a pair of notch grooves formed in the male threaded portion of the anchor body. It is supposed to fit. "
It is configured as.

Further, in claim 3, as a specific example of claim 2,
"The regulation unit has the body and an auxiliary member screwed into the male screw portion of the anchor body, and the engaging means in which the engaging portion of the body is fitted and engaged with the auxiliary member is provided. Is forming "
It is configured as.

The invention of claim 4 is an example of a driving mode of a pushing member, and in any one of claims 1 to 3.
"The push member is a driver tool or a bolt type that is manually rotationally driven and is screwed onto the body."
It is configured as.

Similarly, as an example of the driving mode of the push member, in claim 5, in any one of claims 1 to 3.
"The push member is a reciprocating type driven by an impact hammer."
It is configured as. The impact hammer refers to a hammer in which the striking body reciprocates in small steps in the axial direction to intermittently apply an impact force in the axial direction to the pushing member, and includes the main body of the impact drill.

Claims 6 and 7 show an example of a construction unit to which the extension tool of the present invention can be applied. Of these, in the example of claim 6, in any one of claims 1 to 5,
"The construction portion is made of a metal member and has a hollow structure in which a person cannot turn his / her hand to the back side. The metal member has a mounting hole into which the expansion portion can be inserted, and the expansion portion expands and deforms. It comes to hit the back surface of the metal member. "
It is configured as.

On the other hand, in the example of claim 7, in any one of claims 1 to 5,
"The construction portion is made of concrete, and the concrete has a mounting hole into which the expansion portion can be inserted, and the expansion portion expands and deforms so as to extend to the inner surface of the mounting hole."
It is configured as.

In the present invention, the expansion portion may be configured to be directly expanded by one expansion pin, or may be indirectly expanded via another member (for example, a ball or a taper pin). ..

When the expansion tool of the present invention is used, the expansion pin is pushed by the pushing member, but since the pushing member can be driven by using the power tool, the burden on the operator can be significantly reduced. Further, in the extension tool of the present invention, since the push member is incorporated in the regulation unit that engages with the anchor body, it is easy to align the axis of the push member with the axis of the anchor body. Therefore, it is possible to prevent or remarkably suppress diagonal striking of the expansion pin and improve the quality of construction.

There are two types of expandable anchors, one is a type in which the anchor body has a male thread part exposed on the outside of the construction surface (male thread type), and the other is a female thread formed in the hollow part of the anchor body, and the entire anchor body is a pilot hole. There is a type to be inserted (female screw type).

When the present invention is applied to the former male thread type, it is possible to screw the body constituting the regulation unit into the male thread portion of the anchor body, but as in claim 2, a notch groove is formed in the engaging portion. By adopting a method of fitting into the male screw part from the side, the regulation unit can be engaged and disengaged from the male screw part with one touch, so that work efficiency can be improved.

In claim 2, as a means for holding the body immovably with respect to the male screw portion, a mode in which the engaging portion is engaged with the nut and a mode in which the engaging portion is engaged with the notch groove of the anchor body are provided. As presented, adopting the former aspect has the advantage that it can be directly applied to conventional expandable anchors. On the other hand, if a method of forming a notch groove in the male threaded portion as in the latter method is adopted, it is not necessary to screw the nut into the male threaded portion in advance, so the anchor body is fixed to the construction portion and then the workpieces are stacked. Then, when fixing with a nut, there is an advantage that work efficiency can be improved.

As a means of engaging the engaging portion of the body with the male threaded portion of the anchor body, a nut for fixing the work is screwed into the male threaded portion and the engaging portion is applied to the seat surface to prevent the body from retreating. However, as in claim 3, when an auxiliary member having an engaging means formed therein is used, by preparing a plurality of types of auxiliary members having different inner diameters, one body has a plurality of different outer diameters. Has the advantage of being applicable to the extendable anchors of.

Further, if the engaging portion of the body is fitted in the notch groove of the auxiliary member, the expandable anchor can be set on the body without shifting in the axial direction. Therefore, the expandable anchor is set on the body in advance. Therefore, the procedure of inserting the anchor body into the mounting hole can be taken. Therefore, workability can be improved as compared with the case where the expandable anchor is first set in the construction portion and then the body is engaged.

When the bolt method (screw method) as in claim 4 is used as a method of moving the pushing member in the axial direction, the generation of vibration and noise can be remarkably suppressed, and the driver tool for fixing the workpiece is pushed by the pushing member. Since it can also be used for driving, the burden on the operator can be further reduced by reducing the types of tools used for construction.

On the other hand, as in claim 5, when the pushing member is driven by the impact hammer, a large striking force can be applied to the expansion pin, so that it is suitable for use as an expandable anchor for concrete (in the expansion anchor for concrete). , Since a large resistance is generated against the expansion of the expansion part, a large force is often required for driving (pushing).)

The extension tool of the present invention can be applied to both the attachment of the work to the metal member as in claim 6 and the attachment of the work to concrete (stone-based member) as in claim 7. Therefore, it is excellent in flexibility and versatility.

It is a separated perspective view of the first embodiment. It is sectional drawing which shows the construction procedure of 1st Embodiment. (A) is a cross-sectional view in a state where the work is fixed after the construction procedure of FIG. 2, and (B) and (C) are views showing other construction methods. (A) and (B) are views showing the construction procedure of the second embodiment using the auxiliary member, (C) is a side view of the auxiliary member, (D) is another example view of the auxiliary member, and (E) is the third. It is a figure which shows the embodiment. (A) is a cross-sectional view of a fourth embodiment applied to a male screw type anchor for concrete, and (B) is a cross-sectional view of a fifth embodiment applied to a female screw type anchor for concrete. (A) is a perspective view of a sixth embodiment, (B) is a cross-sectional view showing a usage state of the sixth embodiment, and (C) is a cross-sectional view showing a usage state of the seventh embodiment.

(1). Structure of First Embodiment Next, an embodiment of the present invention will be described with reference to the drawings. First, the structure of the first embodiment will be described. In the first embodiment, the construction portion is composed of a metal member S having a hollow portion such as a hollow steel pipe, and a work (some member) W (see FIG. 3A) is fixed by an expandable anchor.

The expandable anchor 1 includes an elongated steel anchor body (shaft body, shank) 2, an expansion pin 3 incorporated in the anchor body 2, and a nut 4 screwed into the anchor body 2. The anchor body 2 includes a male screw portion 5 into which the nut 4 is screwed, and an expansion portion 7 formed by a plurality of (4) slits 6. Further, the expandable anchor 1 includes a washer 8.

In the present embodiment, the expansion portion 7 is formed in the shape of an abacus ball having a tapered surface facing in the opposite direction, and the maximum diameter is slightly smaller than or the same as the inner diameter of the prepared hole 9 formed in the metal member S. It has a diameter (it may be slightly larger). The outer shape of the expansion portion 7 may be a straight shape having the same diameter over the entire length, or a taper shape that expands the diameter at a slight angle toward the tip (taper of the tip narrowing). It can also be formed into a shape.)

As shown in FIGS. 2B and 2C, the tip of the expansion pin 3 has a tapered surface 10 with a narrowed tip, while the inner surface of the expansion 7 has a narrowed tip. Therefore, when the expansion pin 3 is driven in, the expansion portion 7 expands and deforms as shown in FIG. 2 (C). A flange portion (head) 11 is provided at the rear end of the expansion pin 3.

The expansion tool 13 is composed of a body 14 constituting a regulation unit and a bolt 15 as an example of a pushing member. The body 14 has an elongated body portion having an opening 16 on one side surface, and a U-shaped incision groove 17 is formed at one end of the body portion so that the body 14 can be fitted and removed from the anchor body 2 in the lateral direction. While the engaging portion (bottom plate) 18 is integrally formed, the end plate 20 provided with the female screw hole 19 into which the bolt 15 is screwed is integrally formed at the other end of the body portion. As a matter of course, the axis of the body 14 and the axis of the bolt 15 coincide with each other. Further, the incision groove 17 and the opening 16 communicate with each other. The outer shape of the body 14 is hexagonal, but various shapes such as a circle and a quadrangle can be adopted.

The bolt 15 is driven by a driver bit B (see FIG. 1) provided in the driver tool. Since the rotational torque acting on the bolt 15 is proportional to the size of the circumscribed circle of the head of the bolt 15, the head of the bolt 15 Is preferably as large as possible (a large moment can be applied to the bolt to increase the pushing force on the expansion pin 3).

Needless to say, the groove width of the incision groove 17 is larger than the outer diameter of the male screw portion 5 in the anchor body 2 and smaller than the outer diameter of the washer 8. When the washer 8 is not used, the size is smaller than the diameter of the inscribed circle on the outer peripheral surface of the nut 4. Due to the presence of the incision groove 17, the engaging portion 18 can be fitted and detached from the anchor body 2 from the lateral direction orthogonal to the axis thereof.

(2). Construction procedure FIGS. 2 to 3 (A) show a procedure in which the expandable anchor 1 is first attached to the metal member S and then the work W is fixed. In this procedure, for example, the expandable anchor 1 is set on the body 14 by first fitting the expandable anchor 1 into the body 14, screwing the bolt 15 by hand, and lightly touching the tip of the bolt 15 to the expansion pin 3. To do.

Next, the portion of the anchor body 2 on the tip side of the nut 4 is inserted into the pilot hole 9 of the metal member S, and then the bolt 15 is rotationally driven by a power driver (not shown) to move forward. Then, the expansion pin 3 is pushed by the bolt 15 to move forward, and the expansion portion 7 is expanded and deformed as shown in FIG. 2C. Instead of setting the expandable anchor 1 on the body 14 in advance, the tip end side portion of the anchor body 2 may be inserted into the pilot hole 9 of the metal member S first, and then the body 14 may be engaged with the anchor body 2. ..

After expanding and deforming the expansion portion 7, the bolt 15 is retracted to remove the body 14 from the anchor body 2, then the nut 4 is once removed, the work W is fitted into the anchor body 2, and then the nut 4 is attached to the anchor body 2. Screw in to fix.

When the expansion pin 3 is advanced to expand and deform the expansion portion 7, if the base portion of the expansion portion 7 is set to partially hit the pilot hole 9, the expansion portion 7 stretches into the pilot hole 9 and causes the expansion portion 7 to be stretched. The expandable anchor 1 can be easily held in a state where it does not move. Therefore, when the work W is placed on the surface of the metal member S, even if the work W hits the front end of the expandable anchor 1, the expandable anchor 1 can be prevented from falling to the back side of the metal member S.

As described above, since the expansion tool 13 of the present embodiment pushes the expansion pin 3 by the rotation of the bolt 15, the burden on the operator can be significantly reduced as compared with the driving using a hammer. Further, since the axis of the anchor body 2 and the axis of the bolt 15 are aligned with each other, the expansion pin 3 does not bend or break due to diagonal striking. Therefore, construction defects can be prevented.

In the above procedure, the expandable anchor 1 was fixed to the metal member S first, but as shown in FIG. 3B, the work W is preliminarily placed on the surface of the metal member S and then the expansion portion 7 is expanded and deformed. It is also possible. In this case, since it is not necessary to remove the nut 4 and then reattach it, the work efficiency is remarkably improved. The mounting timing of the work W may be selected according to the situation at the site.

When the work W is retrofitted, if the expandable anchor 1 is firmly fixed to the metal member S due to the expansion deformation of the expansion portion 7, as described above, even if the work W accidentally hits the front end of the anchor body 2, the expandable anchor 1 is expandable. There is an advantage that the anchor 1 does not fall off on the back side of the metal member S.

Therefore, as shown in FIG. 3C, when the expansion portion 7 is expanded and deformed to a state where it cannot be pulled out from the prepared hole 9 of the metal member S, the rotation operation of the bolt 15 is once stopped and the body 14 is pulled to expand the expansion portion 7. When the base portion of the portion 7 is brought into contact with the inner peripheral edge of the prepared hole 9 and then the rotation of the bolt 15 is restarted to expand and deform the expansion portion 7, the expansion portion 7 can be firmly attached to the metal member S. ..

In the present embodiment, when the tip of the bolt 15 is in contact with the expansion pin 3, the expansion anchor 1 is held so as not to move back and forth with respect to the body 14, so that the body 14 is held on the surface of the metal member S. The expansion portion 7 can be expanded and deformed by the rotation of the bolt 15 even when it is in a floating state.

As shown by the alternate long and short dash line in FIG. 2A, it is possible to form an engaging recess 21 in which the flange portion 11 of the expansion pin 3 is fitted on the front end surface of the bolt 15. When the engaging recess 21 is formed in this way, the expansion pin 3 can be reliably prevented from falling, so that there is an advantage that the buckling deformation of the expansion pin 3 can be reliably prevented. Therefore, the engaging recess 21 can be applied to other embodiments.

(3). Third Embodiment In the above-described embodiment, the engaging portion 18 is directly fitted into the anchor body 2, but as shown in FIGS. 4A to 4C as the second embodiment, the anchor body is formed. It is also possible to screw the auxiliary member 23 into the male screw portion 5 of 2 and fit the engaging portion 18 into the engaging groove 24 formed in the auxiliary member 23. The engagement groove 24 is formed by a pair of flanges 25 and 26. Although it is formed over the entire circumference of the engaging groove 24, the mode of a pair of parallel grooves can also be selected.

The engaging groove 24 is an example of the engaging means, but as the engaging means of the auxiliary member 23, as shown in FIG. 4D, the engaging step portion 27 having the flange 25 only inside the body 14 It can also be in the form. Also in this case, when the bolt 15 is screwed in by hand and hits the tip of the expansion pin 3, the flange 25 stretches against the engaging portion 18, so that the expandable anchor 1 can be attached to the body 14 without being disengaged.

In many cases, a plurality of types of expandable anchors 1 having different outer diameters of the anchor body 2 are prepared, but when the auxiliary member 23 is used, a plurality of types having different inner diameters are prepared. One body 14 can be used to expand and deform the expansion portion 7 of various expansion anchors 1.

In the third embodiment shown in FIG. 4 (E), a pair of notch grooves 28 into which the engaging portion 18 of the body 14 is fitted are formed at the front end portion of the anchor body 2. The notch groove 28 is cut open as in the previous embodiment. Further, in this embodiment, the engaging portion 18 is formed so as to be displaced behind the tip of the body 14. As can be understood from this example, the position of the engaging portion 18 can be arbitrarily set in consideration of the relationship between the expandable anchor 1 and the metal member S.

(4). 4th to 5th Embodiments FIG. 5 shows an embodiment applied to the expandable anchor 31 for concrete. First, the expandable anchor 31 for concrete will be described. The expandable anchor 31 is basically the same as the conventional one, and a slit is formed in an appropriate portion on the tip side of the circularly formed anchor body 32. The expansion portion 7 is formed by forming 6.

Although four slits 6 are formed in a cross shape, it is also possible to form three slits at 120 ° intervals or six slits at 60 ° intervals. Further, although the slit 6 is an open method in which the slit 6 is cut open to the tip of the anchor body 2, a closed method in which the slit 6 does not reach the tip of the anchor body 2 can also be adopted (this point is another embodiment). Is the same.)

In the fourth embodiment shown in FIG. 5A, the anchor body 2 includes a male screw portion 5 exposed from the surface of concrete C. On the other hand, in the example shown in (B), the anchor body 2 is entirely inserted into the prepared hole 34 formed in concrete, and the female screw 36 is formed inside the hollow portion. In each example, the sleeve 37 is fitted from the outside into the portion centered on the expansion portion 7. The sleeve 37 is held by the anchor body 2 in a state where it does not easily come off and move.

In both embodiments of FIG. 5, the regulation unit is composed of a body 14 and an auxiliary member 23, and the body 14 is formed with an engaging portion 18 having an incision groove 17 opened in a direction orthogonal to the paper surface. There is. Therefore, the auxiliary member 23 is formed with an engaging groove 24 into which the engaging portion 18 is fitted and detached. When the expandable anchor 31 is a bolt type, it is possible to form a pair of parallel notch grooves 28 as shown in FIG. 4 (E) without using the auxiliary member 23. In addition, in FIG. 5A, the auxiliary member 23 shown in FIGS. 4A to 4D can be used as it is.

In the fifth embodiment used for the female screw type expansion anchor 31 shown in FIG. 5 (B), the auxiliary member 23 is integrally formed with a screw boss portion 38 screwed to the female screw 36 of the expansion anchor 31. A flange 25 is formed on a portion exposed to the outside of the construction surface. The flange 25 is formed in a U shape when viewed from the axial direction of the anchor body 32, and an engaging groove 24 that fits and detaches from the lateral direction is formed on the inner surface of the body 14. Therefore, in the present embodiment, the engaging groove 24 is the engaging portion according to the claim. The engaging groove 40 is U-shaped when viewed from the axial direction.

In any of the embodiments, a hammer rod 41 having a head portion 41a is slidably mounted inside the body 14. Further, in each example, the expansion pin 3 is inserted inside the tip end side of the anchor body 32. Therefore, the tip of the hammer rod 41 has entered the inside of the anchor body 32. Regarding the bolt type expansion type anchor 31 of (A), the expansion pin 3 may be exposed behind the anchor body 32 as in the previous embodiment. In this case, the slide type can be used. The hammer rod 41 may not be used.

In both embodiments of FIG. 5, the pushing member is composed of a hammer rod 41 and a bolt 42 that pushes the hammer rod 41, and when the hammer rod 41 that slides in the axial direction is used, a rotational force acts on the expansion pin 3. Therefore, bending deformation and twisting deformation can be prevented, and driving defects can be accurately prevented. Further, when the impact wrench is used, the hammer rod 41 moves forward in small steps, so that the state is the same as when the impact hammer is used, and the certainty of driving the expansion pin 3 can be further improved.

The head portion 41a of the hammer rod 41 is formed into a non-circular shape such as a hexagon, or the head portion 41a and the body 14 are key-engaged so that the hammer rod 41 can be slidably and non-rotatably attached to the body 14. Then, the hammer rod 41 can be prevented from rotating together with the bolt 42, which is preferable.

When using an impact wrench as a drive tool, the outer diameter of the head of the bolt 15 is set to a size larger than that of a normal bolt specified by JIS (for example, 1.5 times or more), and the rotation acting on the bolt 15 is performed. By increasing the moment, it is possible to amplify the striking force acting on the hammer rod 41, and if such a torque amplification means is provided, even if it is applied to the expandable anchor 31 for concrete, the impact wrench can be used. The expansion pin 3 can be firmly driven without increasing the size.

Therefore, it is possible to ensure that the expansion pin 3 is driven by using an impact wrench for fixing the work, which can further contribute to reducing the bird's-eye view of the worker and improving work efficiency. In the embodiment of FIG. 5, the operation of inserting and removing the body 14 into the auxiliary member 23 is performed in a state where the bolt 42 is removed and the hammer rod 41 is separated from the anchor body 2.

(5). Sixth to Seventh Embodiments In the sixth embodiment shown in FIGS. 6A and 6B, the anchor body 2 is formed in a cylindrical shape, and the female screw portion 43 formed at the tip thereof is an expandable type. It is designed to be screwed into the male threaded portion 5 of the anchors 1 and 31. Further, as in the first embodiment, the bolt 15 is screwed into the rear end portion of the body 14, and the expansion pin 3 is pushed by the bolt 15.

The bolt 15 is driven by an electric screwdriver or an impact wrench 44, and the electric screwdriver 44 is provided with a head case 45 that fits into the rear end of the body 14. Therefore, the rotation axis of the electric screwdriver 44 and the axis of the expandable anchor 1 can be accurately aligned with each other to ensure the prevention of diagonal striking.

On the other hand, also in the seventh embodiment shown in (B), the anchor body 2 is formed in a cylindrical shape and a female screw portion 43 is formed at the tip portion, but in this embodiment, the anchor body 2 reciprocates in the axial direction as a pushing member. A moving hammer rod 41 is used. The hammer rod 41 is slidably fitted in a guide cylinder 47 provided in the impact hammer 46.

Also in this embodiment, the impact hammer 46 is provided with a head case 48 that fits into the rear end of the body 14. Therefore, the axis of the impact hammer 46 and the axis of the expansion pin 3 can be aligned with each other to prevent bending and deformation of the expansion pin 3.

In the embodiment of FIG. 6, it is preferable to attach the expandable anchors 1 and 31 to the body 14 in advance and then insert the expandable anchors 1 and 31 into the prepared holes 9 and 34 during the construction. Since the head cases 45 and 48 can be easily removed from the body 14, the work of removing the body 14 after construction can be easily performed.

Although the embodiments of the present invention have been described above, the present invention can be embodied in various ways. For example, the expansion pin can be composed of a plurality of members arranged in the axial direction.

The present invention can be embodied in an expansion tool for an expandable anchor. Therefore, it can be used industrially.

S Metal members that make up the construction part C Concrete that makes up the construction part 1 Expandable anchor 2 Anchor body 3 Expansion pin 4 Nut 5 Male thread part 6 Slit 7 Expansion part 9 Pilot hole 13 Expansion tool 14 Body that makes up the regulation unit 15 Push Bolt as an example of a member 17 Incision groove 18 Engagement part 23 Auxiliary member constituting a regulation unit 24 Engagement groove 28 Notch groove 31 Expandable anchor for concrete 32 Anchor body 41 Hammer rod as an example of a push member

Claims (7)

It has an anchor body provided with an expansion portion on one end side, and an expansion pin having a portion inserted into the anchor body. When the expansion pin is pushed toward the expansion portion, the expansion portion expands. It is an expansion tool used for an expandable anchor that is deformed and held so that it will not come off from the construction part.
A pushing member for pushing the expansion pin and a regulating unit for holding the anchor body so as not to move forward when pushing the pushing member are provided, and the pushing member is attached to the regulating unit so as to be relatively movable.
Expansion tool for expandable anchors. While the anchor body has a male screw portion exposed from the construction surface,
The regulation unit includes a body having an engaging portion formed in the male threaded portion of the anchor body from the lateral direction orthogonal to the male threaded portion, and the engaging portion is fitted into the male threaded portion from the lateral direction. Has an incision groove that allows
The engaging portion is held immovably by a nut screwed into the male threaded portion, or the engaging portion is fitted into a pair of notch grooves formed in the male threaded portion of the anchor body. It is designed to fit,
The expansion tool for an expansion type anchor according to claim 1. The regulation unit has the body and an auxiliary member screwed into the male screw portion of the anchor body, and the engaging portion of the body is fitted and engaged with the auxiliary member to form an engaging means. doing,
The expansion tool for an expansion type anchor according to claim 2. The push member is a driver tool or a bolt type that is manually rotationally driven and is screwed onto the body.
The expansion tool for an expansion anchor according to any one of claims 1 to 3. The push member is a reciprocating type driven by an impact hammer.
The expansion tool for an expansion anchor according to any one of claims 1 to 3. The construction portion is made of a metal member and has a hollow structure in which a person cannot turn his / her hand to the back side. The metal member has a mounting hole into which the expansion portion can be inserted, and the expansion portion expands and deforms. It is designed to hit the back surface of the metal member.
The expansion tool for an expansion anchor according to any one of claims 1 to 5. The construction portion is made of concrete, and the concrete has a mounting hole into which the expansion portion can be inserted, and the expansion portion expands and deforms so as to extend to the inner surface of the mounting hole.
The expansion tool for an expansion anchor according to any one of claims 1 to 5.

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