JP6905710B2 - Reinforcing bar cage and rebar cage shape recovery method - Google Patents

Description

The present invention relates to a foldable rebar cage and a method for recovering the rebar cage from a folded state to a normal shape.

Reinforcing bar cages used for beams, columns, etc. are composed of a plurality of main bars extending parallel to each other and a large number of hoop bars parallel to each other that surround these multiple main bars and are arranged at intervals in the longitudinal direction of the main bars. These main bars and hoop bars are bound by a binding member made of a metal wire.
It is common to assemble the above-mentioned rebar cage at the construction site, but the efficiency of the assembly work is low. When the reinforcing bar cage is assembled at the factory and transported to the construction site, the efficiency of the reinforcing bar cage assembly work can be improved, but the transport efficiency of the reinforcing bar cage is significantly reduced. This is because the reinforcing bar cage has a large volume and is bulky.

Patent Document 1 described later discloses a method of assembling a reinforcing bar cage at a factory and then transporting it to a construction site in a folded state. According to this method, the efficiency of both assembling and transporting the reinforcing bar cage can be improved.
The method of Patent Document 1 will be described more specifically. Temporarily bind the main bar and the hoop bar at the intersection with a binding member. In this temporary binding, the hoop muscles are loosely bound to the main muscles so that they can rotate. Due to this loose temporary binding, the rebar cage is foldable, transported in the folded state, and returned to the normal shape at the time of manufacture at the construction site.

Patent Document 2 described later discloses a foldable reinforcing bar cage by binding a main bar and a hoop bar using a stretchable binding member.

Japanese Unexamined Patent Publication No. 2006-283475 Japanese Patent No. 3839963

Patent Document 1 does not disclose the provisional binding method in detail. With loose temporary binding, the reinforcing bar cage must be returned to its normal shape at the construction site and then re-bound, which is troublesome.
Patent Document 2 does not describe in detail the orientation of the binding member at the intersection of the main bar and the hoop bar in the reinforcing bar cage.

The present invention has been made to solve the above problems, and a plurality of main bars extending linearly in parallel with each other and a plurality of main bars surrounding the plurality of main bars and arranged at intervals in the longitudinal direction of the main bars are arranged with each other. A large number of parallel hoop muscles and a binding member for binding the main bar and the hoop muscle at the intersection of the main bar and the hoop muscle are provided, and each of the binding members is bridged to the intersection. At the same time, the hoop muscles are arranged so as to pass through two spaces that are not adjacent to each other among the four spaces separated by the main muscles and the hoop muscles, the hoop muscles form a rectangle, and the main muscles are at least 4 of the hoop muscles. In the rebar cage placed in the corner
When the reinforcing bar cage is viewed from the side with the reinforcing bar cage horizontal, the binding member is inclined in the same direction.
When the reinforcing bar cage is viewed from above with the reinforcing bar cage horizontal, the binding member that binds the main bar and the hoop bar located at the upper right corner of the hoop bar is inclined in the first direction. The binding member that binds the main bar and the hoop muscle located in the upper left corner of the hoop muscle is inclined in the second direction intersecting the first direction and is located in the lower right corner of the hoop muscle. The binding member that binds the main bar and the hoop muscle is inclined in the second direction, and the binding member that binds the main bar and the hoop muscle located at the lower left corner of the hoop muscle is the first It is characterized by being inclined in one direction.

According to the above configuration, since the reinforcing bar cage can be folded, the efficiency of assembling and transporting the reinforcing bar cage can be improved. Moreover, since the direction of the binding member has been devised, even if the main bar and the hoop bar are firmly tied, the upper surface of the reinforcing bar cage can be folded by moving it with respect to the lower surface in the extending direction of the main bar. Even after returning to the normal shape, the bound state can be almost maintained, and the time and effort for rebinding can be greatly reduced.

Another aspect of the present invention is in a reinforcing bar cage in which the hoop bars form a circle and the main bars are arranged at intervals along the circumferential direction of the hoop bars.
When the reinforcing bar cage is viewed from the side with the reinforcing bar cage horizontal, the binding member is inclined in the same direction.
When the reinforcing bar cage is viewed from above with the reinforcing bar cage horizontal, the binding member that binds the upper side portion of the hoop reinforcement and the main reinforcement on the right side is inclined in the first direction, and the hoop reinforcement is used. The binding member that binds the upper side portion and the left side main bar is inclined in the second direction that intersects the first direction, and the binding member that binds the lower side portion of the hoop muscle and the right side main bar is The binding member that is inclined in the second direction and binds the lower side portion of the hoop muscle and the main muscle on the left side is characterized in that it is inclined in the first direction.

The binding member may be made of a metal wire.
The binding member may have an intermediate member made of a stretchable material and a pair of metal wires connected via the intermediate member. When this binding member is used, the intermediate member stretches when the reinforcing bar cage is folded, so that the binding is hardly loosened. Therefore, even if the reinforcing bar cage is returned from the folded state to the normal shape, the work of rebinding is almost unnecessary, and the bound state can be maintained even if the folding and returning to the normal shape are repeated.

The main bar may be a threaded reinforcing bar having threaded joints formed at equal pitches in the longitudinal direction. Since the screw joints are relatively high and the pitch is short, stable binding can be performed by catching the binding member and the screw joints.

In the method for recovering the shape of the reinforcing bar cage of the present invention, the reinforcing bar cage is made normal by returning the reinforcing bar cage from the folded state to the normal shape and then binding the brace bars extending diagonally to the main reinforcing bar using another binding member. Keep in shape. According to this method, the reinforcing bar cage can be stably maintained in a normal shape.

According to the present invention, the reinforcing bar cage can be folded in a tightly bound state, and the work after the folded state is restored to the normal shape can be significantly reduced.

It is a perspective view which shows the reinforcing bar cage which forms the 1st Embodiment of this invention in a state which was laid down horizontally, and shows the bundling member for bundling a main bar and a hoop bar in a simplified manner. It is a top view of the said reinforcing bar cage. It is a side view of the said reinforcing bar cage. It is an enlarged plan view of the upper side part of the hoop muscle and the main muscle, and shows the bundling member in a simplified manner. FIG. 4A is a view corresponding to FIG. 4A showing a state in which the reinforcing bar cage is being folded. It is an enlarged plan view of the lower side portion of the hoop muscle and the main reinforcement, and the side side portion of the hoop muscle is shown as a cross section and the binding member is simplified. FIG. 5A is a view corresponding to FIG. 5A showing a state in which the reinforcing bar cage is being folded. It is an enlarged side view of the right side part of the hoop muscle and the main muscle, and shows the bundling member in a simplified manner. FIG. 6A is a view corresponding to FIG. 6A showing a state in which the reinforcing bar cage is being folded. It is a side view which shows the state which reinforced by the brace bar after returning the said reinforcing bar cage from the folded state to the normal state at a construction site. It is an enlarged side view which shows the right side side part and the main bar of the hoop bar in the reinforcing bar cage which form the 2nd Embodiment of this invention. It is a cross-sectional view of the reinforcing bar cage which forms the 3rd Embodiment of this invention. It is a top view which shows the state which the reinforcing bar cage of the 3rd Embodiment is laid down horizontally. It is a side view of the reinforcing bar cage of the 3rd Embodiment. FIG. 11A is a diagram corresponding to FIG. 11A showing a state in which the reinforcing bar cage is being folded. It is an enlarged perspective view which shows the main bar and the hoop bar of the reinforcing bar cage which form 4th Embodiment of this invention, and shows the binding member simplified by a double ring. It is sectional drawing which shows the other aspect of a bundling member.

Hereinafter, the first embodiment of the present invention will be described with reference to FIGS. 1 to 7.
FIG. 1 shows a state in which a reinforcing bar cage used for a beam or the like is laid down horizontally. For convenience of explanation, a virtual reference plane P (see FIG. 2) passing through the center of the reinforcing bar cage is set. The illustrated reinforcing bar cage is horizontally tilted with the reference plane P vertical.

The reinforcing bar cage surrounds the four (plural) main bars 1 to 4 which are parallel to the reference plane P and extend in a straight line parallel to each other, and these main bars 1 to 4, and in the longitudinal direction of the main bars 1 to 4. It has a large number of hoop muscles 5 that are spaced apart and parallel to each other.
The hoop muscles 5 form a vertically long rectangle in the vertical direction, and the main muscles 1 to 4 are arranged at the four corners of the hoop muscles 5.

In the figure, the left and right are set with the folding direction F described later as the front. The hoop muscle 5 has an upper side portion 5a and a lower side portion 5b orthogonal to the reference plane P, and a right side portion 5c and a left side portion 5d parallel to the reference plane P. The hoop muscle 5 forms a vertically long rectangle in the vertical direction. That is, the side sides 5c and 5d are longer than the upper side 5a and the lower side 5b.
The main muscle 1 is located in the upper right corner of the hoop muscle 5, the main muscle 2 is located in the upper left corner of the hoop muscle 5, the main muscle 3 is located in the lower right corner of the hoop muscle 5, and the main muscle 4 is located in the lower left corner of the hoop muscle 5. It is located in the corner.

The main bars 1 to 4 and the hoop bars 5 are bound by the binding member 6 at the intersection. The binding member 6 is made of, for example, a plurality of bundled thin metal wires.
At each intersection, the binding member 6 spans the intersection of the main bars 1 to 4 and the hoop muscle 5, and forms two spaces that are not adjacent to each other among the four spaces divided by the main bars 1 to 4 and the hoop muscle 5. Pass. By twisting and connecting both ends of the binding member 6 together, the main bars 1 to 4 and the hoop bars 5 are bound. In the figure, the binding member 6 is simplified by a single ring.

As shown in FIG. 4A, the binding member 6 that binds the main bar 1 in the upper right corner and all the hoop bars 5 is inclined in the first direction when viewed from above. That is, it is inclined so as to proceed from the inside to the outside toward the folding direction F described later. On the other hand, the binding member 6 that binds the main bar 2 in the upper left corner and all the hoop bars 5 is inclined in the second direction when viewed from above. That is, it is inclined so as to proceed from the inside to the outside toward the folding direction F. The first and second directions intersect with each other. Therefore, the binding members 6 at the main bars 1 and 2 are inclined so as to be separated from each other in the folding direction F when viewed from above.

As shown in FIG. 5A, the binding member 6 that binds the main bar 3 in the lower right corner and all the hoop bars 5 is inclined in the second direction when viewed from above. That is, it is inclined so as to proceed from the outside to the inside in the folding direction F. On the other hand, the binding member 6 that binds the main bar 4 in the lower left corner and all the hoop bars 5 is inclined in the first direction when viewed from above. That is, it is inclined so as to proceed from the outside to the inside in the folding direction F. Therefore, the binding members 6 at the main bars 3 and 4 are inclined so as to approach each other in the folding direction F when viewed from above.

The portion of the binding member 6 located outside the hoop muscle 5 may be located on the upper side portion 5a or the lower side portion 5b of the hoop muscle 5, or may be located on the side side portion 5c or 5d. When the outer portion of the binding member 6 is located on the upper side portion 5a or the lower side portion 5b, it is inclined in a substantially linear shape as shown in FIGS. 4A and 5A when viewed from above, but the side portion 5c or When it is located at 5d, it has a bent shape. Even in this case, the inner portion of the binding member 6 is inclined so as to be substantially linear when viewed from above. When the diameter of the hoop muscle 5 is smaller than that of the main muscles 1 to 4, the difference in shape seen from above of the binding member 6 in the above two cases becomes small.

As shown in FIG. 6A, the binding member 6 is tilted so as to be tilted in the same direction when viewed from the side in a direction orthogonal to the reference plane P. Specifically, it is inclined so as to proceed from top to bottom in the folding direction F described later.

Since the direction of the binding member 6 at the main bar 1 in the upper right corner (first direction) and the direction of the binding member 6 at the main bar 3 in the lower right corner (second direction) are different, when viewed from above, when viewed from above, The binding member 6 at the main bar 1 and the binding member 6 at the main bar 3 appear to draw an X shape. The binding member 6 at the main bar 2 in the upper left corner and the binding member 6 at the main bar 4 in the lower left corner also appear to draw an X shape.

Reinforcing bar cages having the above configuration can be assembled at the factory to increase productivity. The rebar cage can be folded after assembly. At this time, the reinforcing bar cage is folded by moving the upper surface portion of the reinforcing bar cage in the F direction in the drawing along the longitudinal direction of the reinforcing bar cage.

In the folding step, the upper side portion 5a of the hoop bar 5 rotates with respect to the main bars 1 and 2, but the positional relationship hardly changes, and the lower side portion 5b also rotates with respect to the main bars 3 and 4, but the positional relationship is Almost no change.

On the other hand, the right side portion 5c of the hoop muscle 5 is greatly inclined from the state orthogonal to the main reinforcements 1 and 3, and the adjacent right side portions 5c overlap each other. Similarly, the left side portion 5d of the hoop muscle 5 is greatly inclined from the state orthogonal to the main reinforcements 2 and 4, and the adjacent left side portions 5d overlap each other.

In the folding step, the binding member 6 does not provide a large resistance to the tilting of the right side portion 5c and the left side portion 5d of the hoop muscle 6. The reason will be described below.

At the time of folding, as shown in FIGS. 4B and 6B, the right side portion 5c and the left side portion 5d rotate in the direction opposite to the F direction with respect to the upper main bars 1 and 2. That is, the right side portion 5c rotates in a direction away from the portion 6x of the binding member 6 passing through the space separated by the main bar 1 and the right side portion 5c, and the left side portion 5d includes the main bar 2 and the left side portion 5d. It rotates in a direction away from the portion 6x of the binding member 6 passing through the space separated by.

At the time of the folding, as shown in FIGS. 5B and 6B, the right side portion 5c and the left side portion 5d rotate in the F direction with respect to the lower main bars 3 and 4. That is, the right side portion 5c rotates in a direction away from the portion 6x of the binding member 6 passing through the space separated by the main bar 3 and the right side portion 5c, and the left side portion 5d includes the main bar 4 and the left side portion 5d. It rotates in a direction away from the portion 6x of the binding member 6 passing through the space separated by.

As described above, when the reinforcing bar cage is folded, the side side portions 5c and 5d rotate with respect to the main reinforcing bars 1 to 4 without interfering with the binding member 6, so that the reinforcing bar cage can be folded without receiving a large resistance. .. Therefore, the binding member 6 can firmly bind the reinforcing bars 1 to 4 and the hoop bars 5 in the assembly process of the reinforcing bar cage at the factory, instead of the temporary binding in which the reinforcing bars 1 to 4 and the hoop bars 5 are loosened.

The reinforcing bar cage can be transported to the construction site or the yard adjacent to the construction site in the folded state, and the transport efficiency can be improved. At the construction site, the rebar cage in the folded state can be returned to the normal shape by lifting the folded reinforcing bar cage while moving the upper surface portion in the direction opposite to the F direction.
As described above, the binding member 6 returns to the original binding state, but since it is firmly bound, the work of rebinding can be significantly reduced.

After returning to the normal shape, in order to prevent the reinforcing bar cage from being crushed (folded), a brace bar 100 extending diagonally with respect to the main bars 1 to 4 is used as shown by an imaginary line in FIG. Both ends of the brace muscle 100 extend in parallel with the main bars 1 to 4, and both ends are bound to the main bars 1 to 4 using a binding member. If necessary, the brace muscle 100 is bound to the side portions 5c and 5d of the hoop muscle 5. The brace muscle 100 is inclined so as to go downward as it goes in the F direction. After reinforcing with the brace bar 100, the reinforcing bar cage is provided for construction work.

Hereinafter, other embodiments of the present invention will be described. In these embodiments, the parts corresponding to the preceding embodiments are designated by the same number and the description thereof will be omitted.

FIG. 8 shows a second embodiment of the present invention. In this third embodiment, an additional main bar 8 parallel to the main bars 1 to 4 is arranged at an intermediate height of the reinforcing bar cage. The additional main bar 8 intersects the side portions 5c and 5d of the hoop bar 5 at right angles, and is bound to the side portions 5c and 5d by the binding member 6. These binding members 6 are inclined in the same direction as the binding members 6 that bind the main bars 1 to 4 and the hoop bars 5 described above. That is, out of the four spaces separated by the additional main bar 8 and the side sides 5c and 5d, the additional main bar 8 and the side sides 5c and 5d are arranged so as to pass through the two spaces where the angle is widened at the time of folding. Has been done. Therefore, the binding member 6 of the additional main bar 8 does not interfere with the side side portions 5c and 5d at the time of folding. Others are the same as in the first embodiment.

Additional main bars may be arranged in the middle of the upper side portion 5a and the lower side portion 5b of the hoop muscle 5. In this case, the direction of the binding member that binds the additional main bar, the upper side portion 5a, and the lower side portion 5b may be either the above-mentioned first direction or the second direction, or both directions may be mixed. This is because the positional relationship between the additional main bar and the upper side portion 5a and the lower side portion 5b does not change in the folding step.

The third embodiment shown in FIGS. 9 to 11 shows a reinforcing bar cage used for columns and the like. The reinforcing bar cage includes a plurality of main bars 9 that are parallel to each other, and a large number of hoop bars 10 that surround the main bars 9 and are arranged at intervals in the longitudinal direction of the main bars 9 and are parallel to each other. The hoop muscles 10 have a circular shape, and the main muscles 9 are arranged at equal intervals along the circumferential direction of the hoop muscles 10. Also in this embodiment, a virtual reference plane P passing through the center of the reinforcing bar cage is set.

When the reinforcing bar cage is viewed from the side with the reference plane P vertical and the reinforcing bar cage horizontal, all the binding members 6 are inclined in the same direction as shown in FIG. 11A. That is, it is inclined so as to proceed from top to bottom toward the folding direction F.

When the horizontal reinforcing bar cage is viewed from above, as shown in FIG. 10, the binding member 6 that binds the upper side portion 10a of the hoop bar 10 and the main bar 9 on the right side is inclined in the first direction. That is, it is inclined so as to proceed from the inside to the outside toward the folding direction F. On the other hand, the binding member 6 that binds the upper side portion 10a of the hoop muscle 10 and the main muscle 9 on the left side is inclined in the second direction. That is, it is inclined so as to proceed from the inside to the outside toward the folding direction F.

Although not shown, when the horizontal reinforcing bar cage is viewed from above, the binding member 6 that binds the lower side portion 10b of the hoop bar 10 and the main bar 9 on the right side is inclined in the second direction. That is, it is inclined so as to proceed from the outside to the inside in the folding direction F. On the other hand, the binding member 6 that binds the lower side portion 10b of the hoop muscle 10 and the main reinforcement 9 on the left side is inclined in the first direction. That is, it is inclined so as to proceed from the outside to the inside in the folding direction F.

The direction of the binding member that binds the main bar 9 located on the reference plane P and the center of the upper side portion 10a and the lower side portion 10b of the hoop bar 10 may be either the first direction or the second direction described above, or both directions. May be mixed.

The fact that the binding member 6 does not interfere with the hoop bar 10 when the reinforcing bar cage of the third embodiment is folded as shown in FIG. 11B is the same as that of the first embodiment, and thus the description thereof will be omitted.
Even when the main bar is arranged near the center of the upper side portion 10a and the lower side portion 10b of the hoop muscle 10, it is necessary to specify the direction of the binding member 6 that binds the main muscle and the hoop muscle 10. do not have.

FIG. 12 shows a fourth embodiment of the present invention. In this fourth embodiment, screw reinforcing bars formed by forming screw joints N at equal pitches are used as main bars 1 to 4. Since the screw knot N is higher and narrower than the knot of a normal deformed reinforcing bar, it can be easily caught by the binding member 6 and can firmly bind the main bars 1 to 4 and the hoop bar 5. Others are the same as in the first embodiment. This screw reinforcing bar may be used for the reinforcing bars 8 and 9 of the second and third embodiments.

FIG. 13 shows the binding member 6 in another aspect. The binding member 6 has an intermediate member 6a made of rubber (a stretchable material) and a pair of metal wires 6b and 6c connected via the intermediate member 6a. The intermediate member 6a has a cylindrical shape (ring shape), and metal wires 6b and 6c pass through the intermediate member 6a. The binding member 6 is bridged at the intersection of the main bar and the hoop bar, and the metal wires 6b and 6c are bundled and twisted to bind the main bar and the hoop bar.
When the binding member 6 is used, since the intermediate member 6a is stretched when the reinforcing bar cage is folded, a large force is not applied to the metal wires 6b and 6c, and the binding is hardly loosened. Therefore, even if the rebar cage is repeatedly folded, it does not have to be reunited.

The present invention is not limited to the above embodiments, and various aspects are possible without departing from the gist of the present invention.
The brace muscle 100 used in the first embodiment may be used in the second and third embodiments.

The present invention can be applied to a foldable rebar cage.

1 to 4, 8 and 9 Main bars 5, 10 Hoop bars 5a, 10a Upper side 5b, 10b Lower edge 5c, 5d Side 6 Bundling member 6a Intermediate member 6b, 6c Metal wire 100 Brace bar

Claims (6)

Multiple main bars that are parallel to each other and extend linearly,
A large number of hoop muscles that surround the plurality of main muscles and are arranged at intervals in the longitudinal direction of the main muscles and are parallel to each other.
At the intersection of the main bar and the hoop muscle, a binding member that binds the main bar and the hoop muscle, and
With
Each of the binding members is laid across the intersection and is arranged so as to pass through two spaces that are not adjacent to each other among the four spaces separated by the main bar and the hoop bar.
In a reinforcing bar cage in which the hoop bars form a rectangle and the main bars are arranged at least at the four corners of the hoop bars.
When the reinforcing bar cage is viewed from the side with the reinforcing bar cage horizontal, the binding member is inclined in the same direction.
When the rebar cage is viewed from above with the rebar cage horizontal,
The binding member that binds the main bar and the hoop muscle located in the upper right corner of the hoop muscle is inclined in the first direction.
The binding member that binds the main bar and the hoop muscle located at the upper left corner of the hoop muscle is inclined in the second direction intersecting the first direction.
The binding member that binds the main bar and the hoop muscle located at the lower right corner of the hoop muscle is inclined in the second direction.
The binding member for binding the main bar and the hoop bar located at the lower left corner of the hoop bar is a reinforcing bar cage characterized in that it is inclined in the first direction. Multiple main bars that are parallel to each other and extend linearly,
A large number of hoop muscles that surround the plurality of main muscles and are arranged at intervals in the longitudinal direction of the main muscles and are parallel to each other.
At the intersection of the main bar and the hoop muscle, a binding member that binds the main bar and the hoop muscle, and
With
Each of the binding members is laid across the intersection and is arranged so as to pass through two spaces that are not adjacent to each other among the four spaces separated by the main bar and the hoop bar.
In a reinforcing bar cage in which the hoop bars form a circle and the main bars are arranged at intervals along the circumferential direction of the hoop bars.
When the reinforcing bar cage is viewed from the side with the reinforcing bar cage horizontal, the binding member is inclined in the same direction.
When the rebar cage is viewed from above with the rebar cage horizontal,
The binding member that binds the upper side of the hoop muscle and the main muscle on the right side is inclined in the first direction.
The binding member that binds the upper side portion of the hoop muscle and the main muscle on the left side is inclined in the second direction intersecting the first direction.
The binding member that binds the lower side portion of the hoop muscle and the main muscle on the right side is inclined in the second direction.
The binding member for binding the lower side portion of the hoop bar and the main bar on the left side is a reinforcing bar cage characterized in that it is inclined in the first direction. The reinforcing bar cage according to claim 1 or 2, wherein the binding member is made of a metal wire. The reinforcing bar cage according to claim 1 or 2, wherein the binding member has an intermediate member made of a stretchable material and a pair of metal wires connected via the intermediate member. The reinforcing bar cage according to claim 1 or 2, wherein the main reinforcing bar is made of a screw reinforcing bar having screw joints formed at equal pitches in the longitudinal direction. After returning the reinforcing bar cage according to claim 1 or 2 from the folded state to the normal shape, the reinforcing bar cage is maintained in the normal shape by binding the diagonally extending brace bars to the main reinforcing bars using another binding member. A method of recovering the shape of a reinforcing bar cage, which is characterized by this.

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