JP3143573U - Rebar support insert - Google Patents

Abstract

The present invention provides a reinforcing bar supporting insert that supports a reinforcing bar that reinforces a concrete layer around a house horizontally and easily without a hole in a steel formwork or foundation concrete.
An insert 10 includes a base 12 having a shaft hole 12a in which a thread groove passing through an axis is formed, and a circular shallow container shape made of a metal plate that is coaxially fixed to one end of the base 12 in the axial direction. The main body 11 including the mounting portion 13 and an annular magnet 14 inserted into the mounting portion 13 are provided. At the other end in the axial direction of the base portion 12 of the insert 10, a reinforcing bar 16 arranged in a horizontal state on the side on which the inner foundation concrete on which the formwork 17 is erected is placed is inserted into the shaft hole 12a and screwed. The mounting portion 13 is fixed to the mold 17 by the magnetic force of the magnet 14. After the concrete is placed, the outer reinforcing bar 21 is inserted into the shaft hole exposed on the surface and screwed.
[Selection] Figure 5

Description

  The present invention relates to a reinforcing bar supporting insert that horizontally supports reinforcing bars that reinforce a concrete layer such as dog running around a house extending from basic concrete of a house, between entrance soils, and between terrace soils.

  Conventionally, there has been a demand for a reinforcing bar support method that simply supports a reinforcing bar for reinforcing this type of concrete layer before placing the concrete. For example, a method has been used in which a hole is made in the basic concrete, and the hole is inserted into the foundation concrete and fixed. However, in this method, it is not preferable to make a hole in the foundation concrete, and the labor for making the hole is great. On the other hand, a hole is made in the steel formwork used for placing the concrete, and the rebar is inserted into the hole before placing the concrete, or the reinforcing bar placed in the foundation concrete placement part is drilled. There was also a way to extend to the outside through. However, it is complicated to make a hole in a specified position of the steel mold itself, and there is a problem that it is difficult to use the steel mold frame with the hole in places other than the reinforcing bar support.

On the other hand, as shown in Patent Document 1, for example, a flange is formed on one end wall of a base tube made of a metal material, and a screw groove is formed on the inner wall of the base tube. Also known is an insert in which a bolt having a large-diameter head is screwed. This insert is attached to a wooden formwork by driving a nail through an insertion hole provided in the flange portion. However, with this insert, there is a problem that the labor for driving the nail is very complicated, and the mounting strength is not sufficient only by the nail fastening. Furthermore, this insert has the disadvantage that it cannot be used for steel molds that have become mainstream in recent years.
No. 48-90656

  The present invention is intended to solve the above problem, and can reinforce reinforcing concrete layers around a house horizontally and simply without any holes in steel formwork or foundation concrete. It is an object to provide a support insert.

  In order to achieve the above object, the structural features of the present invention are a straight rod-like base portion provided with a shaft hole formed with a thread groove penetrating between both axial ends, and an axial end of the base portion. The end of the reinforcing bar arranged in a horizontal state on the concrete placing side is provided with an annular mounting portion fixed around the shaft hole and a magnet fixed to the mounting portion around the shaft hole. It is to be screwed into the shaft hole from the other axial end side and to be detachably attached to the steel mold on the attachment portion side.

  In the present invention configured as described above, the rebar horizontally disposed on the concrete placing side of the steel mold is screwed and sealed to the other end of the shaft hole of the rebar support insert. In the state, the insert is fixed to the steel mold by attaching it to the steel mold with a magnet on the attachment portion side which is one end side in the axial direction. In this state, concrete is placed in the steel mold to form foundation concrete. Here, since the insert is firmly fixed to the steel mold by means of reinforcing bars and magnets, the concrete is surely prevented from dropping off or being displaced from the steel mold by placing concrete. By removing the steel formwork after the concrete is hardened, the reinforcing bar supporting insert is embedded in the basic concrete without blocking the shaft hole with the concrete, and one end side is exposed at a specified position on the concrete surface. By inserting a reinforcing bar from the outside into the shaft hole of the exposed insert and screwing it, the reinforcing bar embedded in the concrete and the outer reinforcing bar are substantially unified through the insert. As a result, according to the present invention, since the outer reinforcing bars that reinforce the concrete layer for the entrance soil around the house are firmly supported by the foundation concrete placing part and arranged stably in the outside, this The concrete layer around the house can be easily and stably reinforced by the reinforcing bars. In addition, in the present invention, the outer reinforcing bars are securely supported horizontally without drilling holes in the foundation concrete or steel formwork, so there is no need for troublesome drilling and the durability of the foundation concrete is ensured. Further, the use of the steel mold is not restricted by the position of the provided hole, and the versatility of the mold is also ensured.

  In the present invention, the magnet may be detachable from the mounting portion. Thereby, the magnet can be removed after the concrete is placed, and the magnet can be used repeatedly, thereby reducing the cost of the magnet.

  Further, in the present invention, the mounting portion is composed of an annular bottom plate portion fixed to the base portion and a cylindrical wall portion integrally provided on the outer peripheral edge of the bottom plate portion and extending in the opposite direction of the base portion. It may be arranged in the section. As a result, the magnet is accommodated in the mounting portion and fixed to the mounting portion in a state surrounded by the mounting portion, so that the magnetic force of the magnet acts efficiently and the adhesion force of the mounting portion to the steel mold is increased. It is done.

  Moreover, in this invention, the contact | adherence means which raises contact | adhesion with concrete may be provided in the contact surface with the concrete of a base and / or an attaching part. For example, on the contact surface of the base or mounting portion with concrete, a wing-like protruding piece protruding outside, a recessed portion recessed from the contact surface, or a fine uneven surface that roughens the contact surface Can be. As a result, a tensile force is applied from the concrete to the insert after the concrete is placed, and the close contact between the insert outer wall surface and the concrete can be enhanced by the close contact means.

  Moreover, in this invention, a nail hole can be provided in an attaching part. Thereby, when using a wooden formwork instead of an iron formwork, the attachment part of the insert which removed the magnet can be fixed to a wooden formwork with a nail. Therefore, since the insert of the present invention can be used not only for a steel mold but also for a wooden mold, the versatility of the insert is enhanced.

  According to the present invention, the other end side of the reinforcing bar supporting insert is supported by the reinforcing bar provided on the foundation concrete placing side in the steel mold frame, and is attached to the steel mold frame on the mounting portion side. Is firmly fixed to the steel mold by means of reinforcing bars and magnets, so that the concrete is surely prevented from dropping off or being displaced from the steel mold by placing concrete. Furthermore, by inserting a reinforcing bar from the outside into the shaft hole of the insert exposed on the surface of the basic concrete, the outer reinforcing bar and the reinforcing bar in the concrete are firmly connected via the insert to be unified. As a result, in the present invention, the outer reinforcing bars that reinforce the concrete layer around the house can be supported horizontally and simply outside the foundation concrete placement part, and the outer reinforcing bars form the concrete layer around the house. Reinforcement can be performed easily and stably. In addition, according to the present invention, it is not necessary to make holes in the basic concrete or steel formwork to support the reinforcing bars, so there is no need to make holes, and the durability of the basic concrete and the steel formwork can be reduced. Versatility is ensured.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1, 2, and 3 are reinforcing bar support inserts for supporting an outer reinforcing bar embedded in a concrete layer around a house on the extension of the reinforcing bar embedded in the basic concrete for a house according to the first embodiment. 10 (hereinafter referred to as an insert) is shown by a partially broken front view, a left side portion, and a right side view. 4 and 5 show the use state of the insert 10 in a partially broken sectional view and a sectional view.

  The insert 10 is a regular hexagonal metal rod having a base portion 12 having a shaft hole 12a formed with a thread groove penetrating the shaft center, and a metal plate fixed coaxially to one axial end (the left end in the figure) of the base portion 12. The main body 11 which consists of the circular shallow container-shaped attachment part 13 and the annular | circular shaped magnet 14 inserted in the attachment part 13 are provided. The shaft hole 12a is formed with a thread groove 12b in the entire axial direction, and a threaded portion of a reinforcing bar 16 and an outer reinforcing bar 21, which will be described later, can be screwed into the thread groove 12b. The attachment portion 13 integrally includes a circular bottom plate portion 13a having a central hole 13b having a diameter slightly larger than the shaft hole 12a at the center and a cylindrical wall portion 13c provided perpendicularly to the outer peripheral edge of the bottom plate portion 13a. . The attachment portion 13 is provided at a low cost by pressing the perforated flat plate. The attachment portion 13 is fixed to the base portion 12 by welding or the like at the bottom plate portion 13a, and is disposed so that the cylindrical wall portion 13c extends in the direction opposite to the base portion 12. The base 12 is not limited to a hexagon, and may be another polygon, a circle, an ellipse, or the like. Further, the attachment portion 13 is not limited to a circle but may be a polygon, an ellipse, or the like.

  The magnet 14 has a center hole 14a having an outer diameter slightly smaller than that of the cylindrical wall portion 13c, a diameter slightly larger than that of the center hole 13b, and a thickness slightly smaller than the height of the cylindrical wall portion 13c. It is. The magnet 14 is detachably fixed to the bottom plate portion 13 a, is accommodated in the attachment portion 13, and is surrounded by the attachment portion 13. Therefore, the magnetic force of the magnet 14 acts effectively, and the attachment strength of the attachment portion 13 to a steel mold 17 (hereinafter referred to as a mold) described later is increased. In addition, about a magnet, you may make it collect not only in an annular | circular shaped integral item but to arrange | position several small magnet pieces and to arrange in the attachment part 13 in an annular | circular shape. Further, the magnet 14 may be fixed to the bottom plate portion 13a with an adhesive, thereby enabling stable fixing.

Next, the operation of the first embodiment will be described.
As shown in FIG. 4, the reinforcing bars disposed in a horizontal state on the side where the inner concrete foundation with the formwork 17 is placed is placed on the other axial end of the base 12 (the right end in the figure) of the insert 10. 16 is inserted into the shaft hole 12 a and screwed, and the mounting portion 13 is fixed to the mold 17 by the magnetic force of the magnet 14. Thus, the insert 10 is securely attached to the mold 17 by being supported by the reinforcing bars 16 and being fixed to the mold 17 by the magnet 14. In this state, concrete is placed in the mold 17 to form foundation concrete 18. Here, since the insert 10 is firmly fixed to the mold 17 by the reinforcing bars 16 and the magnets 14, dropping from the mold 17, positional displacement, and the like are reliably prevented by placing concrete. Moreover, since the shaft hole 12a of the main body 11 of the insert 10 is blocked by the reinforcing bars 16, the intrusion of concrete is prevented, so that the shaft hole 12a is not filled with concrete.

  Thereafter, by removing the formwork 17, one end side of the insert 10 is exposed at a specified position on the surface of the foundation concrete 18. Further, as shown in FIG. 5, by inserting a rebar 21 from the outside into the exposed shaft hole 12 a and screwing it, the outer rebar 21 is firmly supported in a horizontal state via the insert 10, and the inside of the basic concrete 18 Reinforcing bar 16 and outer reinforcing bar 21 are substantially unified through insert 10. A concrete layer for running a dog around the house, between the entrance soil, between the terrace soil, and the like is cast and formed on the outer reinforcing bar 21 thus arranged.

  As a result, in the first embodiment, the outer reinforcing bars 21 stably reinforce concrete layers such as dog running around the house, between the entrance soil and the terrace soil. In addition, since it is not necessary to make a mounting hole in the foundation concrete 18 or the formwork 17 as in the prior art, there is no need for drilling, and the durability of the foundation concrete 18 and the versatility of the formwork 17 are ensured. The In addition, about the magnet 14, it is possible to remove from the attaching part 13, and since the magnet 14 can be used repeatedly by this, magnet cost can be reduced.

Next, a modification of the insert 10 will be described with reference to FIG.
In the modified example, the shape of the attachment portion 13 of the main body 11 of the insert 10 is a square instead of the attachment portion 23, and two rectangular magnets 27 are attached to the attachment portion 23 so as to be separated from each other. The attachment portion 23 integrally includes a rectangular bottom plate portion 24 having a central hole 24a having a diameter slightly larger than the shaft hole 12a at the center and a rectangular cylindrical wall portion 25 provided perpendicularly to the outer peripheral edge of the bottom plate portion 24. ing. The base 12 is the same as that in the first embodiment. As a result, the same effects as those of the first embodiment can be obtained by the modification, and the magnet 27 can be divided, so that the cost of the magnet 27 is reduced.

Next, Example 2 will be described with reference to FIG.
In Example 2, the contact surface of the main body 11 of the insert 10 </ b> A with the concrete is provided with a close contact means for increasing the close contact with the concrete. As a close contact means, the base portion 12 of the main body 11 is provided with a large number of iron-like protruding pieces 31 made of the same material as the base portion 12 protruding away from each other on the outer surface, and the outer surface of the attachment portion 13 is rough and fine. An uneven portion 32 is provided. In Example 2, a tensile force is applied to the insert 10A from the concrete by placing the concrete. However, the protruding piece 31 and the concavo-convex portion 32, which are close contact means, are in close contact with the concrete so that the insert is opposed to the tensile force of the concrete. The adhesion between the outer wall surface and the concrete can be enhanced. In addition, about the protrusion piece 31 and the uneven | corrugated | grooved part 32, you may use any one with respect to the main body 11. FIG.

Next, Example 3 will be described with reference to FIGS.
In the third embodiment, in the insert 10 of the first embodiment, nail holes 34 are provided at two radially opposite positions of the bottom plate portion 13a of the mounting portion 13 of the main body 11, and other configurations are described in the embodiment. Same as 1. Thereby, when using a wooden formwork as a formwork for concrete pouring, the attachment part 13 which removed the magnet 14 can be fixed to a wooden formwork with the nail which is not illustrated through the nail hole 34. FIG. Therefore, in Example 3, since the insert can be used not only for the steel mold but also for the wooden mold, the versatility of the insert is improved. Note that the number of the nail holes 34 is not limited to two, and may be one or more, and the arrangement position on the bottom plate portion 13a is not limited to the arrangement position of the third embodiment. In addition, the third embodiment can be applied to the modified example and the second embodiment.

  The inserts shown in the above-described embodiments and modifications are all steel members, but can be replaced by members made of a composite material such as resin or FRP. In this case, it is necessary to fix the magnet attached to the attachment portion with an adhesive. Moreover, in the said Example, although the case where an insert is used for the support of the reinforcement for the concrete layer reinforcement of a house is demonstrated, it is used also as a metal for civil engineering, for example. In addition, the insert shown in the above embodiment is merely an example, and various modifications can be made without departing from the spirit of the present invention.

  The insert of the present invention is useful because it can easily and reliably horizontally support a reinforcing bar that reinforces a concrete layer around a house without making a hole in a foundation concrete or a steel mold.

It is a partially broken front view which shows the reinforcing bar support insert which is Example 1 of this invention. It is a left view which shows the main body of the insert. It is a right view which shows the main body of the insert. It is a partially broken front view which shows the use condition of the insert. It is a front sectional view showing the state where the outside rebar was screwed to the insert. It is a left view which shows the insert which is a modification. It is a partially broken front view which shows the insert which is Example 2. FIG. It is a partially broken front view which shows the main body of the insert which is Example 3. FIG. It is a right view which shows the main body of the insert.

Explanation of symbols

10, 10A: Rebar support insert, 11: Main body, 12: Base, 12a: Shaft hole, 12b: Screw groove, 13: Mounting portion, 14: Magnet, 16: Rebar, 17: Steel formwork, 18: Foundation Concrete, 21: Outer rebar, 23: Mounting part, 27: Magnet, 31: Projection piece, 32: Concavity and convexity, 34: Nail hole.

Claims (5)

A base having a straight rod shape and a shaft hole formed with a thread groove penetrating between both ends in the axial direction; an annular mounting portion fixed around the shaft hole at one axial end of the base; And a magnet fixed to the mounting portion around the shaft hole, and the tip of a reinforcing bar disposed in a horizontal state on the concrete placing side is screwed into the shaft hole from the other axial end side of the base portion. The reinforcing bar supporting insert is detachably attached to the steel mold on the attachment portion side. The rebar support insert according to claim 1, wherein the magnet is detachably attached to the attachment portion. The mounting portion includes an annular bottom plate portion fixed to the base portion, and a cylindrical wall portion integrally provided on the outer peripheral edge of the bottom plate portion and extending in a direction opposite to the base portion, and the magnet is attached to the mounting portion. The reinforcing bar supporting insert according to claim 1, wherein the reinforcing bar supporting insert is disposed in a portion. The reinforcing bar supporting insert according to any one of claims 1 to 3, wherein an adhesion means for increasing adhesion with concrete is provided on a contact surface of the base and / or the attachment part with concrete. The insert for supporting reinforcing bars according to any one of claims 1 to 4, wherein a nail hole is provided in the mounting portion.

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