JP6343384B1 - Rebar fixing tool - Google Patents

Abstract

There is provided a reinforcing bar fixing tool capable of flexibly responding to the crossing angle of reinforcing bars to be fastened and capable of reliably fastening even reinforcing bars in three or more different directions.
SOLUTION: Two U bolts 11 and 12 intersecting at a bent portion 13 and connected to each other at the intersecting portion, and a base member (plate 20) having four insertion holes 24 and 25, are provided. The tip of one U-bolt 11 is inserted into two of the insertion holes 24 and 25 that are not adjacent to each other, the tip of the other U-bolt 12 is inserted into the other two insertion holes 24 and 25, and the insertion holes 24 and 25 are inserted. Nuts 30 are screwed into the tips of the inserted U bolts 11 and 12, respectively.
[Selection] Figure 3

Description

  The present invention relates to a bar arrangement fixture.

Conventionally, in a reinforced concrete structure, a reinforcing bar fixing tool that fixes the reinforcing bars in an intersecting state before placing the concrete is used. In addition, in field cast concrete piles and the like, a reinforcing bar fixing tool is used when constructing a reinforcing steel cage.
As such a bar arrangement fixing tool, it has one U bolt, two nuts, and a fastening plate, and a plurality of reinforcing bars are stored by tightening the nut after the intersection of the plurality of reinforcing bars is stored inside the U bolt. The thing which fixes is used.

In the reinforcing bar intersection fastener of Patent Document 1, an arc-shaped bent portion that is bent in a direction intersecting with the bending direction is formed between the male screw portion and the U-shaped bent portion at both ends. Two U-bolts form two loops that accommodate the reinforcing bars.
In the reinforcing bar intersection fastener of Patent Document 2, an engagement groove is formed in the plate to accommodate one of the reinforcing bars, and the engagement is performed by two sets of U bolts and nuts arranged across the engagement groove. Another reinforcing bar extending in the direction intersecting the groove is fastened to the plate.

Japanese Patent No. 5951981 JP 2014-181514 A

In the fastening metal fittings of Patent Literature 1 and Patent Literature 2, two reinforcing bars in the intersecting direction can be fastened and fixed, but the intersecting angle of the two reinforcing bars is limited to a specified angle (orthogonal direction). For this reason, there is a possibility that the fastening fitting cannot be smoothly attached when the crossing angle of the two reinforcing bars to be fastened is not a right angle.
Further, depending on the design of the reinforcing bars, three or more reinforcing bars having different directions from each other, such as vertically and horizontally, may intersect at the same location. However, the fastening brackets of Patent Document 1 and Patent Document 2 described above are based on the assumption that two reinforcing bars that are orthogonal to each other are fastened, and it is difficult to securely fasten reinforcing bars in three or more different directions.

  An object of the present invention is to provide a bar arrangement fixing tool that can flexibly cope with the crossing angle of bar arrangements to be fastened and can be surely fastened even with bar arrangements in three or more different directions.

The bar arrangement fixture of the present invention has two U bolts that intersect at a bent portion and are connected to each other at the intersection, and a base member that has four insertion holes, and the two U bolts Are connected by pins penetrating each intersecting portion, the through hole of the U bolt is formed thicker than the shaft diameter of the pin, and the two U bolts can rotate with respect to the pin as an axis, And it is swingable in the other direction centering on the part connected by the pin, the tip of one of the U bolts is inserted into two non-adjacent ones of the insertion holes, and the other two insertions The other U-bolt tip is inserted into the hole, and a nut is screwed into each of the U-bolt tips inserted into the insertion holes.
The reinforcing bar fixed by the reinforcing bar fixing tool of the present invention is usually a steel bar, but may be a reinforcing bar made of a material other than steel.
In the present invention, as the U-bolt, it is possible to use a U-bolt formed by bending an intermediate portion of a series of steel bars and forming both end sides in parallel. The bent middle part may be arcuate or may be polygonal such as substantially V-shaped.
In the present invention, as the base member, in addition to a plate such as a steel plate, a flat lattice material or a net can be used.

In the reinforcing bar fixing device of the present invention, two U-bolts are arranged in the crossing direction on the surface of the base member, so that a four-legged “cage-like body” is formed. In a four-legged cage, there is a “frame” through which the bar arrangement can be inserted between the two “foot” of each U-bolt (the part of the U-bolt that is fixed to the base member). It is formed toward the four sides of the cage.
In these “frames”, the bar arrangements in the crossing direction can be fastened by passing the bar arrangements so as to pass through two opposing frames (two frames not adjacent to each other). The bar arrangement in the intersecting direction only needs to be able to be inserted between the two intersecting U-bolts, and can be accommodated smoothly even if the intersecting angle is deviated from a right angle. Furthermore, with respect to the bar arrangement extending obliquely with respect to the bar arrangement in the cross direction, the bar arrangement can be fastened together with the bar arrangement in the cross direction by passing through the two adjacent frames.
In this way, after inserting a plurality of reinforcing bars appropriately into each frame of the cage-like body formed by crossed U-bolts, the nut is inserted by further tightening the nut on the opposite side of the base member. Each reinforcement can be fastened with.
Therefore, according to the bar arrangement fixing tool of the present invention, it is possible to flexibly cope with the crossing angle of the bar arrangements to be fastened, and it is possible to securely fasten the bar arrangements in three or more different directions.

Furthermore, in the bar arrangement fixing tool of the present invention, the two U bolts are connected by pins that pass through the respective intersecting portions, and the through hole of the U bolt is formed thicker than the shaft diameter of the pins. The U-bolts of the book can be rotated with respect to the pin as an axis, and can swing in other directions around a portion connected by the pin,
It is possible to flexibly cope with the change in posture of the two U bolts according to the bar arrangement.

In the bar arrangement fixture according to the present invention, it is preferable that the insertion hole is a long hole capable of selecting the insertion position of the U bolt.
In the present invention, the position at which the two U bolts are fixed to the base member can be adjusted, the mutual postures of the two U bolts can be changed, Also, it is possible to flexibly cope with fastening and fixing of bar arrangements in three or more different directions.

In the bar arrangement fixture according to the present invention, it is preferable that the base member is formed of a plate material, and the base member is formed with a communication hole that communicates the front and back.
In the present invention, when concrete is placed around the bar arrangement in a state where the bar arrangement is fastened by the bar arrangement fixture, the concrete slurry is filled up to the inside of the bar arrangement fixture to embed the bar arrangement. At this time, when a plate material (plate) is used as the base member, the inflow of the concrete slurry may be partially blocked by the plate. However, since the communication hole is formed in the base member, the concrete slurry can be allowed to flow through the communication hole. Thereby, a concrete slurry can be reliably filled to the inside of a bar arrangement fixture.

  ADVANTAGE OF THE INVENTION According to this invention, the reinforcement fixing tool which can respond | correspond flexibly to the crossing angle of the reinforcement arrangement to fasten, and can be reliably fastened even if it is reinforcement arrangement of three or more different directions can be provided.

The perspective view which looked at the assembly state of one embodiment of the present invention from the upper part. The perspective view which looked at the assembly state of the said embodiment from the downward direction. The disassembled perspective view which shows the bar arrangement fixing tool of the said embodiment. The perspective view which shows the U volt | bolt of the said embodiment. The perspective view which shows the connection part of the U volt | bolt of the said embodiment. The top view which shows the plate of the said embodiment. The perspective view which shows other embodiment of this invention. The top view which shows the modification of the plate of the said embodiment. The top view which shows the modification of the plate of the said embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In FIG. 1 and FIG. 2, the reinforcing bar fixing tool 1 is installed at a crossing position of a plurality of reinforcing bars 2 which are reinforcing bars, and these reinforcing bars 2 are fastened together.
Of the plurality of reinforcing bars 2, the two reinforcing bars 2A and 2B are arranged orthogonal to each other, and the other two reinforcing bars 2C and 2D are also arranged orthogonal to each other. The reinforcing bars 2A and 2B are arranged at an angle of 45 degrees with respect to the reinforcing bars 2C and 2D. The intersection position of the reinforcing bars 2A and 2B and the intersection position of the reinforcing bars 2C and 2D are the same position. That is, the reinforcing bars 2A to 2D are arranged in a state where the four bars intersect at one point on the plane. These four reinforcing bars 2A to 2D are collectively fastened by the bar arrangement fixture 1 arranged at the crossing position.

In FIG. 3, the bar arrangement fixing tool 1 includes two U bolts 11 and 12, a plate 20 that is a base member, and four nuts 30.
As shown in FIG. 4, each of the U bolts 11 and 12 is formed by bending a steel bar, and a pair of bent portions 13 are formed in the middle and extend in parallel in the same direction on both sides thereof. Leg portions 14 and 15 are formed. The legs 14 and 15 are linear, and a male screw 16 is formed at each end thereof.
The bent portion 13 has a pair of straight portions 132 and 133 on both sides of the central bent portion 131, and is continuous with the foot portions 14 and 15 via a pair of side bent portions 134 and 135. The bent portions 13 of the U bolts 11 and 12 are substantially V-shaped by the central bent portion 131, the straight portions 132 and 133, and the side bent portions 134 and 135, respectively.

As shown in FIG. 5, each of the U bolts 11 and 12 has a through hole 18 formed at the center of a central bent portion 131 that is a substantially V-shaped apex position. A pin 19 is passed through the through-hole 18, and the pin 19 is prevented from being removed from the through-hole 18 by caulking the tip 191.
The U bolts 11 and 12 intersect with each other at the bent portion 13 and are connected to each other at the intersecting portion by the pin 19. The through hole 18 is formed sufficiently loose with respect to the shaft diameter of the pin 19. For this reason, the U bolts 11 and 12 can rotate with respect to the pin 19 as an axis and swing in other directions around the portion connected by the pin 19 (the portion where the through hole 18 is formed). Movement is also acceptable.

Returning to FIG. 4, the four U-bolts 11 and 12 are connected by the pin 19 in a state where the apex positions intersect with each other, whereby the four-legged cage 10 is formed. Frames G1, G2, G3, and G4 through which the reinforcing bars 2A to 2D can be inserted are formed between the four legs of the car-like body 10, respectively.
That is, a frame G1 is formed between the foot 14 of the U bolt 11 and the foot 14 of the U bolt 12, and a frame G2 is formed between the foot 14 of the U bolt 12 and the foot 15 of the U bolt 11. Is done. Further, a frame G3 is formed between the foot 15 of the U bolt 11 and the foot 15 of the U bolt 12, and a frame G4 is formed between the foot 15 of the U bolt 12 and the foot 14 of the U bolt 11. Is done.

As shown in FIG. 6, the plate 20 is formed by punching and bending a steel plate, and bending ribs 22 and 23 are formed on both sides of a rectangular plate-shaped main body 21. A total of four insertion holes 24 and 25 are formed at the four corners of the main body 21, and a communication hole 26 is formed at the center of the main body 21 to communicate the front and back.
The four insertion holes 24 and 25 are two elongated holes extending in parallel with the ribs 22 and 23 in two (non-adjacent two) insertion holes 24 at one diagonal position, and 2 at the other diagonal position. The two (other two) insertion holes 25 are elongated holes extending in the direction intersecting with the ribs 22 and 23, that is, in the direction intersecting with the insertion hole 24.

Returning to FIG. 3, two U bolts 11, 12 that form the aforementioned four-legged cage 10 are mounted on the plate 20.
In the cage 10, the four legs 14 and 15 are inserted into the corresponding insertion holes 24 and 25, respectively, and the nut 30 is screwed into the male screw 16 that is passed through the back side.
In other words, the tip of one U-bolt 11 is inserted into two non-adjacent ones of the insertion holes 24 and 25 (insertion holes 24 and 25 arranged side by side in FIG. 3), and the other two insertion holes 24 and 25 (see FIG. 3, the tip ends of the other U-bolts 12 are inserted into the insertion holes 24, 25) arranged vertically. Accordingly, the two U bolts 11 and 12 are fastened to the plate 20 in a state of the four-legged cage 10, that is, in a state of being arranged in the crossing direction when viewed from above the plate 20.

Further, when the cage 10 is fastened to the plate 20, the reinforcing bars 2A to 2D are inserted into the frames G1 to G4 so that the reinforcing bars 2A to 2D are plated by the U bolts 11 and 12 of the cage 10. 20 (see FIGS. 1 and 2).
In fastening, the rebars 2A to 2D are arranged so that a pair that intersects at right angles passes through the opposing frames G1 to G4 (frames that are not adjacent to each other).
That is, for the reinforcing bars 2A and 2B, the reinforcing bar 2A is passed from the frame G1 to the frame G3, and the reinforcing bar 2B is passed from the frame G2 to G4. As for the reinforcing bars 2C and 2D, the reinforcing bar 2C is passed from the frame G1 to the frame G3, and the reinforcing bar 2D is passed from the frame G2 to G4. In this state, since the frames G1 to G4 have a predetermined width, the reinforcing bars 2A and 2C passing through the same frames G1 and G3 and the reinforcing bars 2B and 2D passing through the same frames G2 and G4 are inclined by 45 degrees. Arrangement can be taken.

According to the above-described embodiment, there are the following effects.
In the bar arrangement fixture 1 of this embodiment, the two U bolts 11 and 12 are arrange | positioned in the cross direction on the surface of the plate 20, and the four-legged cage-like body 10 is formed. In the four-legged cage 10, frames G <b> 1 to G <b> 4 through which reinforcing bars 2 (2 </ b> A to 2 </ b> D) as reinforcements can be inserted between the two legs 14 and 15 of the U bolts 11 and 12. It is formed toward the four sides of the cage.
In these frames G1 to G4, by passing the reinforcing bars 2A to 2D so as to pass through two opposing frames (two non-adjacent frames G1 and G3 and frames G2 and G4), The reinforcing bars 2A and 2B and the reinforcing bars 2C and 2D can be fastened. The reinforcing bars 2A to 2D in the intersecting direction only need to be able to pass between the two intersecting U bolts 11 and 12, and can be smoothly accommodated even if the intersecting angle is deviated from a right angle.

Further, the reinforcing bars 2C and 2D extending obliquely with respect to the reinforcing bars 2A and 2B (passing through the frames G1 and G3) in the intersecting direction are passed through the other two adjacent frames G2 and G4, thereby crossing the reinforcing bars 2A and 2B. And can be fastened together with the reinforcing bars 2A and 2B.
As described above, after appropriately inserting the plurality of reinforcing bars 2A to 2D into the frames G1 to G4 of the car-like body 10 formed by the U bolts 11 and 12 arranged in an intersecting manner, the nut 30 on the opposite side of the plate 20 is attached. By further tightening, the reinforcing bars 2A to 2D can be fastened in the inserted state.
Therefore, according to the bar arrangement fixture 1 of this embodiment, it can respond flexibly to the crossing angle of the reinforcing bars 2A to 2D to be fastened, and can be reliably fastened even with the reinforcing bars 2A to 2D in three or more different directions. .

  In the bar arrangement fixture 1 of this embodiment, the two U bolts 11 and 12 are connected by the pin 19 which penetrates each cross | intersection part. For this reason, the two U bolts 11 and 12 can be rotated around the pin 19. Further, since the through hole 18 through which the pin 19 passes is formed loosely (thicker than the pin 19), the two U bolts 11 and 12 corresponding to the bar arrangement are caused by swinging in directions other than the rotation around the pin 19. It is possible to flexibly respond to changes in posture.

  In the reinforcing bar fixing tool 1 of the present embodiment, the insertion holes 24 and 25 are long holes that can select the insertion positions of the U bolts 11 and 12. For this reason, the position at which the two U bolts 11 and 12 are fixed to the plate 20 can be adjusted, the mutual postures of the two U bolts 11 and 12 can be changed, and the non-orthogonal arrangement is possible. It is possible to flexibly cope with the fastening and fixing of the bars and the fastening and fixing of the reinforcing bars in three or more different directions.

In the bar arrangement fixture 1 of this embodiment, since the plate 20 has the communication hole 26 which communicates front and back, concrete slurry can be easily flowed into the bar arrangement fixture 1 through the communication hole 26. .
That is, in actual application of the reinforcing bar fixture 1, concrete is placed around the reinforcing bars 2 </ b> A to 2 </ b> D with the reinforcing bar fixture 1, and concrete slurry is placed inside the reinforcing bar fixture 1 ( The reinforcing bars 2A to 2D are embedded so as to be filled up to the inside of the cage 10 and the gaps between the reinforcing bars 2A to 2D. At this time, if the plate 20 is present, the inflow of the concrete slurry is blocked. However, since the communication hole 26 is formed in the plate 20, the concrete slurry can be supplied through the communication hole 26. As a result, the concrete slurry can be reliably filled up to the inside of the bar arrangement fixture 1.

Note that the present invention is not limited to the above-described embodiments, and modifications and the like within a scope in which the object of the present invention can be achieved are included in the present invention.
In the above-described embodiment, the U bolts 11 and 12 are formed by bending a steel bar, but a belt-like body may be bent. Further, the U bolts 11 and 12 are not limited to those formed by bending a long material, and may be molded products that are previously molded into a U shape having a bent portion. Furthermore, the U bolts 11 and 12 may be formed of a material other than steel.
In the above-described embodiment, the U bolts 11 and 12 are connected by the pin 19, but the material of the pin 19 is arbitrary, and the steel wire may be connected through the through hole 18 without being limited to a rod shape.

In the said embodiment, although the bending part 13 of the U volt | bolts 11 and 12 was made into substantially V shape, this may be a normal circular arc shape.
In another embodiment of the present invention shown in FIG. 7, the bar arrangement fixture 1A has two U bolts 11A and 12A that form a cage 10A. The U bolts 11A and 12A have a simple arcuate portion 13A. The bent portion may have another polygonal shape.

In the said embodiment, the continuous direction of the long hole of the insertion holes 24 and 25 of the plate 20 as a base member is made into the crossing direction alternately, and the insertion hole 24 (along the ribs 22 and 23 is diagonally located), respectively. A long hole in the crossing direction) and an insertion hole 25 (long hole in the crossing direction with the rib 23).
On the other hand, like the plate 20B shown in FIG. 8, the insertion hole 24 (long hole along the ribs 22 and 23) is arranged on the rib 22 side, and the insertion hole 25 (crosses the ribs 22 and 23) on the rib 23 side. Long holes in the direction) may be arranged.
Further, like the plate 20C shown in FIG. 9, the insertion holes 24C are arranged at the four corners of the plate 20C, and the insertion holes 24C are elongated holes extending along a virtual circumference centering on the center position of the plate 20C. Also good.
8 or 9 as described above, the U bolts 11 and 12 can be displaced along the long hole shape of each of the long holes 24, 25, and 24C. The fixed positions of the 12 plates 20B and 20C can be adjusted.

Furthermore, in the said embodiment, although the insertion holes 24 and 25 of the plate 20 as a base member were made into a long hole, the insertion holes 24 and 25 are not restricted to a long hole, Another shape may be sufficient.
In another embodiment of the present invention shown in FIG. 7, a plate 20A as a base member has circular insertion holes 24A at four corners. The insertion hole 24A is formed so that the inner diameter is sufficiently larger than the outer diameter of the U bolts 11A and 12A (however, smaller than the nut screwed into the insertion hole). Even with such an insertion hole 24A, the fixing position of the U bolts 11 and 12 with respect to the plate 20A can be adjusted.

Like the plate 20A of another embodiment shown in FIG. 7, the communication hole 26 may be omitted. However, since it is desirable not to disturb the flow of the concrete slurry, it is desirable to provide the communication hole 26 when the base member is a plate material.
In the above-described embodiment, the plates 20 and 20A made of a steel plate are used as the base member. However, for example, the base member may be formed of a lattice or a net that ensures rigidity. Even if the communication hole 26 is omitted, the distribution of the concrete slurry can be secured by itself.
In the above-described embodiment, the reinforcing bars (reinforcing bars 2A to 2D) fixed by the plates 20 and 20A as the base member and the reinforcing bar fixtures 1 and 1A are usually steel bars or steel plates, but other than steel materials. Other materials may be used.

  INDUSTRIAL APPLICABILITY The present invention can be used as a bar arrangement fixing tool that fixes a reinforcing bar of a reinforced concrete structure.

  DESCRIPTION OF SYMBOLS 1,1A ... Bar arrangement fixing tool, 10, 10A ... Cage-like body, 11, 11A, 12, 12A ... U bolt, 13, 13A ... Bending part, 131 ... Central bending part, 132, 133 ... Straight part, 134, 135 ... side bent portion, 14, 15 ... foot, 18 ... through hole, 19 ... pin, 191 ... tip, 2, 2A, 2B, 2C, 2D ... rebar, 20, 20A, 20B, 20C ... Plate, which is a base member, 21 ... main body, 22, 23 ... rib, 24, 24A, 24C, 25 ... insertion hole, 26 ... communication hole, 30 ... nut, G1, G2, G3, G4 ... frame.

Claims (3)

Two U bolts intersecting at the bent portion and connected to each other at the intersecting portion, and a base member having four insertion holes,
The two U-bolts are connected by pins that penetrate each intersection,
The through hole of the U bolt is formed to be thicker than the shaft diameter of the pin, and the two U bolts can rotate with respect to the pin as an axis and have a portion connected by the pin as a center. Can swing in the direction of
One end of the U-bolt is inserted into two of the insertion holes that are not adjacent to each other, the other U-bolt is inserted into the other two insertion holes, and the U-bolt is inserted into the insertion hole A bar arrangement fixing tool, wherein a nut is screwed into each end of the bar. The bar arrangement fixture according to claim 1 , wherein the insertion hole is a long hole capable of selecting an insertion position of the U bolt. The bar arrangement fixture according to claim 1 or 2 , wherein the base member is formed of a plate material, and the base member is formed with a communication hole that communicates the front and back. .

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