JP5775369B2 - Reinforcing bar for reinforced concrete and method for constructing reinforcing bar - Google Patents

Description

  The present invention relates to a reinforcing bar used inside a reinforced concrete and a reinforcing bar construction method using the reinforcing bar.

  In general, it is known that a reinforced concrete structure is configured by placing a reinforcing reinforcing bar inside and placing concrete on the reinforcing bar with a cover having a predetermined size. Such a reinforced concrete structure is frequently used in a reinforced concrete structure (RC structure). In a reinforced concrete building, foundation reinforcement is placed in the foundation work, concrete is placed, and in the subsequent construction, the upper-layer reinforcement is placed while being connected to the foundation reinforcement. It is also known to build columns, beams or walls, etc.

  In particular, in the wall-type structure, a reinforced concrete structure wall is constructed and integrated by fixing the upper and lower layers with fixing reinforcing bars. However, when the fixing reinforcement is performed by so-called double reinforcement, it is proposed that the fixing reinforcement is a single reinforcement because the filling property of the concrete may be poor (see Patent Document 1).

JP 2000-328788 (page 3, FIG. 3)

  In the above technology, a single line is placed so as to penetrate the beam located at the joint between the upper and lower layers of the structural wall, and the lower structure wall and the upper layer are fixed by the single line through the beam. It was a structure.

  However, in the construction method of the above configuration, it is necessary to provide fixing reinforcing bars before placing concrete on the lower structural wall, and compared to the case where the fixing reinforcing bars are double reinforcing, It was not easy. In addition, piercing anchored reinforcing bars through columns and beams where the rebars are concentrated concentrates the reinforcing bars of the columns and beams, which leaves a problem in concrete filling properties.

  The present invention has been made in view of the above-mentioned points, and the object of the present invention is to make it possible to fix the structural wall by using the reinforcing bars used for the structural wall or the foundation, thereby simplifying the bar arrangement work. In addition, the present invention is to provide a reinforcing bar for reinforced concrete and a method for constructing a reinforcing bar, which can improve the filling property of the concrete.

  Accordingly, a first invention relating to a reinforcing steel bar for reinforced concrete is a reinforcing steel bar for reinforced concrete configured by bending or bending a continuous reinforcing steel material, and should be arranged inside the reinforced concrete structure to be constructed. An annular portion that can surround a space composed of a plurality of reinforcing bars in a cross-sectional direction, and an extending portion that extends in a predetermined direction from the annular portion, and the annular portion is located near the tip of the reinforcing bar material. It is provided so that it may overlap with a part of reinforcing steel material, and the said extension part is extended outside from this annular part via the part which overlapped in the said annular part.

  According to the above configuration, since the annular portion and the extending portion are made of a continuous rebar material, the annular portion can function as a hoop or a stirrup, and at the same time, the extending portion can By inserting it into this structure, it becomes possible to make the extension part function as a fixing reinforcing bar.

  Further, the second invention according to the reinforcing steel bar for reinforced concrete is a reinforcing steel bar for reinforced concrete formed by bending or bending a continuous reinforcing steel material, and should be arranged inside the reinforced concrete structure to be constructed. A substantially quadrangular annular portion that can be surrounded in the cross-sectional direction while abutting on the outer edges of at least four reinforcing bars located on the outermost side along a transverse section of a space constituted by a plurality of reinforcing bars, and a predetermined distance from the annular portion. An extension portion extending in a direction, and the annular portion is bent or curved at one corner of the substantially rectangular shape near the tip of the reinforcing bar material, and the range from the corner to the tip of the reinforcing bar material In which the part of the reinforcing bar material is overlapped, and the extending part extends outward from the annular part through the overlapping part in the annular part. .

  According to the said structure, a substantially square annular part can be formed with a continuous rebar material, and the perimeter of the said substantially square can be formed with a rebar material. And since the extension part can be made to extend on the extension line of the side, forming one side of a substantially quadrangle, the annular part forming the substantially quadrangle should be used as a normal hoop line or stirrup. Thus, the extending portion functions as a fixing reinforcing bar to be arranged at an appropriate position.

  In each of the above inventions, the annular portion is a substantially rectangular annular portion formed along four sides of the rectangle, and the extending portion is a substantially rectangular long side direction formed by the annular portion. It is good also as a structure which is the extension part extended in this.

  According to the above configuration, for example, when a reinforcing bar is installed in a foundation constructed with a long dimension in the vertical direction, the structural wall of the foundation and the upper layer is used by using the annular portion as a stirrup (ribbon). The fixed reinforcing bars are arranged in a state of being erected from the foundation surface.

  Further, in each of the above inventions, the extension portion may be configured to include a straight portion having a predetermined extension length and a bending portion in which the vicinity of the other end of the reinforcing bar material is bent.

  According to the above configuration, the straight portion can sufficiently function as a fixing reinforcing bar by having a predetermined length, and the curved portion at the tip of the straight portion has the direction of the upper end of the straight portion erected from the surface of the foundation or the like. The vertical direction can be prevented. In other words, after placing concrete on the part including the annular part, the straight part protrudes from the surface such as the foundation as a fixing rebar, so the tip is curved to strengthen the fixing force and sharp cutting It is possible to prevent the tip of the reinforcing bar material having a surface from being exposed upward.

  Further, in place of the above configuration, the extension portion includes a straight portion having a predetermined extension length, a curved portion curved at the end of the predetermined extension length, and a distal end while continuing to the curved portion. It is good also as a structure provided with the folding | turning part formed by making it reach | attain to the said annular part.

  According to the above configuration, since the extending portion is formed by the two reinforcing bars of the straight portion and the folded portion, the fixing between the structure having the annular portion inside and the structure continuous therewith is provided. The state can be the same as a so-called double bar arrangement with two anchoring reinforcing bars. In particular, when the straight portion and the folded portion are provided in parallel, it is exactly the same as the double bar arrangement. Even in such a configuration, when the extending part is provided so as to stand upright from the surface of the foundation or the like, the curved part is positioned at the upper end of the extending part, and thus the tip of the reinforcing bar material having a sharp cut surface Can be prevented from being exposed upward.

  Further, in each of the above inventions, the extension portion may be configured to be angle-adjusted in an arbitrary direction outside the annular portion. According to the above configuration, by adjusting the extending direction of the extending portion, it can be inserted at an appropriate position in the structure wall constructed in the upper layer, and is not limited to the structure wall. It is also possible to fix it with the slab.

  On the other hand, a first invention related to a reinforcing bar building method is a reinforcing bar building method using the annular reinforcing bar according to any one of claims 1 to 5, wherein the reinforcing bar is arranged in a concrete for building a foundation beam or a structural wall. A plurality of transverse bars to be inserted into the annular portion in advance, and when the transverse stripe is installed at a predetermined position, the annular portion is arranged so as to surround a space constituted by the plurality of transverse stripes, and the extension The portion is adjusted so as to be arranged inside the structure located above the annular portion.

  According to the above configuration, the annular portion into which the horizontal stripe is inserted in advance is arranged in a state of inevitably surrounding the space constituted by the horizontal stripe when the horizontal stripe is installed at a predetermined position. Depending on the installation work, it is possible to arrange the annular portion as a stirrup at the same time. Further, by adjusting the position of the extending portion, it is possible to install the fixing reinforcing bar at the same time.

  A second aspect of the reinforcing bar building method is a reinforcing bar building method using the annular reinforcing bar according to claim 6, wherein a plurality of horizontal bars to be arranged in the concrete for building the foundation beam or the structural wall. The annular portion is disposed so as to surround a space constituted by a plurality of transverse stripes when the transverse stripe is installed in a predetermined position, and the extension portion is configured. The straight portion is adjusted so as to be arranged inside the slab or the structural wall located above the annular portion.

  According to the above configuration, even in this case, by installing the horizontal stripe, the annular portion is installed in a state surrounding the space formed by the horizontal stripe, and the annular portion can be arranged as a stirrup. And when the linear part which comprises an extension part is bent outside the annular part and it extends in a horizontal direction, it can fix in the upper layer slab.

  According to the first invention relating to the reinforcing steel bar for reinforced concrete, the annular part can be used as a hoop or a stirrup, and at the same time, the extension part can be inserted into another structure. Therefore, there is no need to separately provide fixing reinforcing bars. Thereby, the amount of the bar arrangement work about the whole building can be reduced, and the bar arrangement work can be simplified. Further, since no individual fixing reinforcing bars are provided, the number of reinforcing bars in the portion where the reinforcing bars are concentrated can be reduced, and the concrete filling property of the portion can be improved.

  Moreover, according to the 2nd invention concerning the reinforcing steel bar for reinforced concrete, in addition to the effect in said 1st invention, when using a cyclic | annular part as a hoop reinforcement or a stirrup, the extension part which functions as a fixed reinforcement The arrangement state can be clarified, and the bar arrangement work can be further simplified. In addition, since the vicinity of the tip of the annular portion is bent or curved at one corner portion of a substantially square shape, one of at least four reinforcing bars constituting the predetermined space is locked to the one corner portion. Therefore, the opening of the annular portion can be suppressed.

  According to the first invention relating to the reinforcing bar construction method, the number of stirrups necessary for the concrete structure to be constructed can be prepared before installing the transverse bars by inserting the transverse bars through the annular portion in advance. Furthermore, since this stirrup can be installed without requiring a separate bar arrangement work, and at the same time, a fixing reinforcing bar can be installed, an extremely simple bar arrangement work can be realized.

  Further, according to the second invention relating to the reinforcing bar construction method, in addition to the effect of the first invention, it is possible to fix the slab as well as the structural wall to be constructed in the upper layer. By using a mixture of reinforced concrete reinforcing bars that can be fixed on the upper structural wall and reinforcing reinforcing bars for reinforced concrete that can be fixed on the upper slab. It is also possible to fix, and this also simplifies the bar arrangement work.

It is a perspective view showing an embodiment concerning a reinforcing steel bar for reinforced concrete of the present invention. It is explanatory drawing which shows the modification of the reinforcing steel for reinforced concrete. It is a figure which shows the usage condition of the reinforcing steel for reinforced concrete. It is a figure which shows the usage condition of the reinforcing steel for reinforced concrete. It is explanatory drawing which shows the use condition of other embodiment of the reinforcing steel bar for reinforced concrete. It is a figure which shows the usage condition of the reinforcing steel for reinforced concrete. It is a figure which shows the usage condition of the reinforcing steel for reinforced concrete. It is a figure which shows the usage condition of the reinforcing steel for reinforced concrete. It is explanatory drawing which shows embodiment concerning the reinforcing bar construction method of this invention. It is explanatory drawing which shows other embodiment of the reinforcing steel bar for reinforced concrete. It is explanatory drawing which shows the use condition of the reinforcing steel bar for reinforced concrete shown to Fig.10 (a). It is explanatory drawing which shows the use condition of the reinforcing steel bar for reinforced concrete shown in FIG.10 (b).

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, an embodiment of the second invention relating to a reinforcing steel bar for reinforced concrete will be described. FIG. 1 is a diagram showing an outline of the present embodiment. As shown in this figure, the reinforcing reinforcing bar T for reinforced concrete of the present embodiment has a configuration including an annular portion 1 and an extending portion 2.

  Here, the annular portion 1 is bent in a state in which the vicinity of the tip 11 is partially left, and further bent at an appropriate place, whereby an upper short side portion 12, one long side portion 13, and a lower short side portion 14. And the other long side part 15 is formed, and comprises the substantially rectangular cyclic | annular form as a whole. Among the above, the other long side portion 15 extends so as to continuously protrude from the annular portion 1, and this constitutes the extension portion 2. Near the boundary between the extended portion 2 and the other long side portion 15, the vicinity of the tip 11 and the other long side portion 15 are partially overlapped.

  The annular portion 1 having such a configuration is formed so as to surround a space constituted by a plurality of reinforcing bars in the cross-sectional direction. That is, as shown in the figure, when the reinforcing bars (hereinafter referred to as the horizontal bars) 4 and 5 arranged with the longitudinal direction being in the horizontal direction are arranged two each in the vertical direction, the upper end bars 41 and 42 and the lower end bars 51 are arranged. , 52 forms a substantially quadrangular prism-shaped space. Then, the periphery of the substantially quadrangular prism-shaped space in the cross-sectional direction is surrounded by the annular portion 1. Therefore, the substantially quadrangular shape formed by the side portions 12, 13, 14, and 15 of the annular portion 1 is matched to the cross-sectional shape of the substantially quadrangular prism-shaped space formed by the horizontal stripes 4 and 5.

  The surrounding of the horizontal bars 4 and 5 by the annular portion 1 is measured in advance (confirmed on the design drawing) where the horizontal stripes are to be arranged, and when the horizontal stripes are installed, the annular portion 1 Processing for appropriately bending (or curving) so as to be surrounded is performed.

  In addition to the upper and lower bars 4 and 5, the intermediate bars 6 may be disposed on the horizontal bars. Such an intermediate bar 6 is also provided as two horizontal bars 61 and 62 having an appropriate interval. The distance between the outermost edges of the two horizontal bars 61 and 62 is the same as the outermost edge of the upper bar 4 or the lower bar 5. Since the distance is the same, it is general that the configuration of the annular portion 1 is not affected. However, when the distance between the intermediate bars 61 and 62 is different from that of the upper and lower end bars 4 and 5, the shape of the annular portion 1 may be approximated from a substantially rectangular shape to a substantially hexagonal shape. obtain. As described above, when the annular portion 1 has a shape other than a substantially square shape, it is an example of an embodiment of a reinforcing steel bar for reinforced concrete according to the first invention. Here, the embodiment of the second invention is described. Only explained.

  By the way, since the extension part 2 of this embodiment is comprised in the part which followed the other long side part 15 of the cyclic | annular part 1, it corresponds with the axial direction of the said other long side part 15. FIG. Accordingly, as shown in the drawing, the extension portion 2 can be protruded upward by setting the upper short side portion 12 to the upper side and the lower short side portion 14 to the lower side.

  In such a case, the extending portion 2 can have various forms. An example is shown in FIG. That is, for example, as shown in FIG. 2A, there is a form in which the bending portion 22 is configured by bending the tip 21 of the extending portion 2. The extending portion 2 having such a configuration is configured to have a linear portion 23 having a predetermined length in order to maintain a predetermined extending length. And by providing the curved part 22, the front-end | tip part 21 which protrudes upwards can be turned below, and it becomes possible not to expose a sharp cutting | disconnection end surface upward.

  Further, as shown in FIG. 2 (b), the extending portion 2 may be bent outside the annular portion 1. Since the bending position 24 is outside the annular portion 1, there is a portion 3 in which the vicinity 11 of the annular portion 1 and the other long side portion 15 overlap each other, and the configuration of the annular portion 1 is the same as described above. . The extending direction of the extending part 2 is on the same plane as the quadrilateral formed by the annular part 1 and is orthogonal to the axial direction of the long side parts 13 and 15. Thereby, it can fix to the structure provided in a horizontal direction from the upper part of the reinforced concrete structure constructed | assembled by the annular part 1 being installed.

  Next, usage modes of the present embodiment will be described. FIG. 3 is a diagram illustrating an example thereof. As shown in this figure, when the horizontal bars 41, 42, 51, 52 having the axis line in the horizontal direction are arranged to constitute the foundation beam, the plurality of reinforcing bars Ta, Tb, Tc according to the above embodiment are used. , Td... Are provided so as to surround the lateral stripes 41, 42, 51, 52. At this time, a substantially quadrilateral cross section is formed by the upper end bars 41 and 42 and the lower end bars 51 and 52, and each annular portion 1a, 1b, 1c, 1d. State.

  Thus, by installing the plurality of reinforcing bars Ta, Tb, Tc, Td,..., The extensions 2a, 2b, 2c, 2d,. Thus, when a structural wall is constructed in the upper layer of the foundation portion, it penetrates into the structural wall. Here, in a building having a wall structure, a reinforced concrete structure is formed also by placing and placing concrete in the structural wall. Therefore, the extending portions 2a, 2b, 2c, and 2d are formed inside the structural wall. ... will be fixed.

  That is, in more detail, as shown in FIG. 4, in the case where the floor slab F, the veranda slab B, and the structural wall W are constructed in the upper part of the foundation portion V, the foundation portion V is configured. Among the bar arrangements, the upper end bars 41 and 42 are positioned approximately in the middle of the thickness dimension of the floor slab F and the veranda slab B, and the extension portion 2 has the thickness dimension of both the slabs F and B. It can reach the inside of the structural wall W beyond. At this time, when using the embodiment in which the extended portion 2 is extended at the same position as the other long side portion 15 of the annular portion 1, the extension portion 2 is structured with the same cover size H2 as the cover size H1 of the long side portion 15 in the base portion V. The bar W will be laid out. Such a bar arrangement state is made possible by matching the position of the outer surface of the structural wall W with the outer surface of the foundation portion V. Therefore, for example, when the center position of the structural wall W is matched with the center position of the foundation portion V, it is necessary to adjust the extension position of the extension portion 2.

  Furthermore, the extension length D of the extension part 2 differs depending on the size of the foundation portion V or the structural wall W to be constructed, the diameter of the reinforcing bar group used, or the like. In order to make the extension part 2 function as a fixing reinforcing bar, the extension length D is configured to a dimension necessary for securing the fixing force.

  Here, you may use the reinforcement reinforcing bar for reinforced concrete of embodiment (refer Fig.2 (a)) formed by curving the front-end | tip of the extension part 2. FIG. As a usage pattern at this time, basically, a plurality of reinforcing bars Ta to Td are provided so that the annular portions 1a to 1d surround the horizontal bars 41, 42, 51, and 52 as in the state shown in FIG. Accordingly, the extending portions 2a to 2d can be arranged in a standing state.

  In this case, as shown in FIG. 5, the extending portion 2 is erected and its tip portion is located near the upper end of the extending portion 2, but the curved portion 22 exists at the upper end, and the reinforcing bar The tip 21 of this is arranged downward. Thereby, for example, after the foundation portion V is placed and before the structural wall W is constructed, the extension portion 2 protrudes upward from the foundation portion V. The rebar tip 21 can be prevented from being exposed upward.

  Note that a slight straight line portion may be formed between the curved portion 22 and the distal end 21, and in this case, the cover dimension H3 between the straight portion and the structure wall end surface is the straight line portion 23 of the extension portion 2. By adjusting the curvature of the curved portion 22 so as to have the same dimension as the cover dimension H <b> 2, the straight portion can form a part of the reinforcing bar group of the structural wall W.

  Moreover, there exists a thing as shown in FIG. 6 in the usage condition of above-mentioned embodiment. In the embodiment used here, the extended portion 2 is bent outside the annular portion 1 (see FIG. 2B). This bending direction is on the same plane as the substantially quadrilateral formed by the annular portion 1 and is perpendicular to the other long side portion 15. According to the form of use of such an embodiment, a plurality of reinforcing bars Ta, Tb, Tc, Td... Are arranged so as to surround the upper reinforcing bars 41 and 42 and the lower reinforcing bars 51 and 52 in the same manner as described above. Accordingly, the extending portions 2a, 2b, 2c, 2d,... Protrude in the horizontal direction at the same height.

  As shown in FIG. 7, the extending portion 2 is arranged inside the floor slab F instead of the structural wall W by the above usage pattern. Thereby, since the extension part 2 will be fixed by the floor slab F, it can be used when fixing with the structural wall W is unnecessary. Moreover, the extension part 2 may be extended toward the slab B for verandas. In this case, the bending angle of the extending portion 2 is adjusted in accordance with the inclination of the veranda slab B (upper surface inclination). Otherwise, the extension portion 2 extends toward the floor slab F. It is the same.

  In addition, it is also possible to mix said each usage form. That is, as shown in FIG. 8, among the plurality of reinforcing bars for reinforced concrete Ta, Tb, Tc, Td..., The reinforcing bars Ta, Tc in the form in which the extending portions 2a, 2c extend in the vertical direction, This is a usage pattern in which the reinforcing bars 2b and 2d extending in the horizontal direction are mixed and arranged. Further, of the extending portions 2b and 2d, one extending portion 2b extends to the floor slab side, and the other extending portion 2d has reinforcing bars Tb and Td extending toward the veranda slab B. To do. As a result, the extending portions 2a, 2b, 2c, 2d... Extend in three directions from the structure in which the annular portions 1a, 1b, 1c, 1d. Accordingly, it is possible to appropriately establish a connection with each building element.

  Next, an embodiment of a reinforcing bar construction method will be described. FIG. 9 is a diagram showing an outline of the present embodiment. As shown in this figure, the reinforcing bar group built inside the foundation or the structural wall is mainly arranged so as to surround the plurality of transverse bars 4, 5, 6a, 6b, 6c, 6d and their surroundings. Where the annular portions 1a,..., 1g are configured, the transverse bars 4, 5, 6a to 6d are inserted through the annular portions 1a to 1g in advance (FIG. 9A).

  Next, among the horizontal bars 4, 5, 6a to 6d, the lower end line 5 is installed on the surface of a predetermined slab or the like, and the upper end line 4 is installed while maintaining a predetermined height from the lower end line 5, A predetermined space is formed by these upper and lower end stripes 4 and 5, and the annular portions 1a to 1g are surrounded in the transverse cross-sectional direction (FIG. 9B). In this way, after the lower end bars 5 are arranged, the upper end bars 4 are lifted so that the upper end bars 4 lift the upper short sides of the annular portions 1a to 1g, and the reinforcing bars Ta,. Will be established. At this time, the reinforcing bars Ta to Tg are erected, but their positions are not fixed, so that they are movable in the axial direction of the horizontal bars 4, 5, 6a to 6d. Therefore, each of the reinforcing bars Ta to Tg is moved to a predetermined position, and is fixed to the horizontal bars at that position by binding or the like. When the reinforcing bars Ta to Tg are erected, the position of the upper reinforcing bar 4 is raised so that the extending direction of the extending portions 2a, ..., 2g is a desired direction (vertical direction in the figure). It is adjusted when making it happen.

  Thus, as shown in FIG. 3 and FIG. 4, by extending the reinforcing bars Ta to Tg while matching the extending direction of the extending portions 2a to 2g with a desired direction (vertical direction), Arrangement for the lower layer structure (base portion V) and arrangement of the fixing reinforcing bar extending upward can be performed simultaneously.

  As described above, when the reinforcing bars for reinforced concrete in which the extending portions 2a to 2g are linear are used, it is an embodiment of the first invention according to the reinforcing bar construction method. On the other hand, in the case of using a reinforcing steel bar for reinforced concrete in which the extending portions 2a to 2g are angle-adjusted in a predetermined direction, it is an embodiment of the second invention according to the reinforcing bar construction method. The reinforcing reinforcing bars for reinforced concrete used in this case have a form as shown in FIG. 2 (b). In this case as well, around the plurality of horizontal bars 4, 5, 6a to 6d, as described above. In order to be able to surround, the horizontal bars 4, 5, 6 a to 6 d are inserted in advance into the annular portions 1 a to 1 g, the lower bar 5 is installed at a predetermined position, and the upper bar 4 is installed at a predetermined height from the lower bar 5. . Thereby, a predetermined space is formed by these upper and lower end stripes 4, 5, and the extending portions 2a to 2g are adjusted to a pre-adjusted angle by enclosing the annular portions 1a to 1g in the cross-sectional direction. For example, the extending portions 2a to 2g can be arranged inside the floor slab F (see FIG. 6).

  Since the annular portions 2a to 2g constituting the lower layer structure (base portion V) function as stirrups, the same number of reinforcing bars as the number of stirrups required in the longitudinal direction of the structure. Ta to Tg will be used. Therefore, as described above, the same number of the reinforcing bars Ta to Tg having the annular portions 1a to 1g into which the horizontal bars 4, 5, 6a to 6d are inserted in advance are inserted at the same time. However, the increase or decrease of these reinforcing bars Ta to Tg depends on whether the horizontal bars 4, 5, 6 a to 6 d are inserted into or removed from the annular portions 1 a to 1 g, so that the number can be adjusted immediately before the work. is there.

  Since the embodiment of the present invention is as described above, if the above embodiment according to the reinforcing reinforcing bar for reinforced concrete is used, the fixing reinforcing bar is also arranged simultaneously with the reinforcing bar for the structure (reinforced concrete structure) in the lower layer. Can do. Moreover, if the extending direction of the extending portion is a desired direction, each state can be formed by supporting the annular portion with the horizontal stripe.

  Then, according to the embodiment of the reinforcing bar construction method, the annular portion and the extending portion can be arranged in a predetermined state by the step of inserting the horizontal stripe in the annular portion and the step of installing the horizontal stripe at a predetermined position. The bar arrangement work can be simplified.

  The embodiment of the present invention is not limited to the above, and various forms can be made without departing from the spirit of the present invention. For example, as an embodiment according to a reinforcing steel bar for reinforced concrete, as shown in FIG. 10 (a), the extension portion 102 may be formed by two reinforcing bars.

  The extension part 102 of the said form is comprised so that the linear part 123 and the folding | returning part 125 parallel to the linear part 123 via the bending part 122 may be provided, and the front-end | tip of the folding | turning part 125 in this case is an annular part 101 is provided so as to reach the vicinity of the center. In such a form, the linear part 123 which comprises the extension part 102 is extended on the axis line of the other long side part 115, and is comprised. That is, the long side part 115 and the straight line part 123 are in a continuous state on a straight line.

  Moreover, when adjusting the protrusion direction by bending or curving the extension part 102 of the reinforcing bar for reinforced concrete of the said form outside the annular part 101, it shows, for example in FIG.10 (b). As described above, there is a configuration in which the straight portion 223 is bent at a substantially right angle at an arbitrary position 224 outside the annular portion 201. In the case of such a form, the straight line part 223 beyond the bent part 224 extends in a substantially orthogonal direction with respect to the other long side part 215 of the annular part 201. Moreover, since the folded portion 225 is in a state parallel to the straight portion 223, between the bent portion 224 and the curved portion 222, two of the straight portion 223 and the folded portion 225 extend in parallel. It will be. In addition, since the folding | returning part 225 is quite long, the front-end | tip part 221 will arrive at the position protruded from the bending part 224 in the opposite direction.

  In the case of using a reinforced concrete reinforcing steel bar having the above-described form, a structure (for example, a structural wall or a floor slab) that is continuous with a structure (for example, a base portion) in which the annular portions 101 and 201 are disposed. On the other hand, it can be set as the structure fixed by two rebars (so-called double reinforcement). That is, in the form illustrated in FIG. 10A, as illustrated in FIG. 11, the extended portion 102 forms the internal rebar of the structural wall W by forming the stirrup of the base portion V by the annular portion 101. Will be configured. At this time, since the two extending portions 102 and the folded portion 125 are parallel to each other, the extending portion 102 forms a double bar arrangement structure by both the portions 123 and 125. At this time, the front end portion 121 of the folded portion 125 reaches the vicinity of the center of the annular portion 101, so that the fixing between the foundation portion V and the structural wall W can be strengthened.

  Furthermore, about the form illustrated in FIG.10 (b), as shown in FIG. 12, the extension part 202 can be used as an internal reinforcement of the floor slab F. As shown in FIG. In this case, two reinforcing bars can be disposed inside the floor slab F, and the folded portion 225 can pass through the vicinity of the upper end of the base portion V to reach the veranda slab. With such a configuration, the three structures of the upper end portion of the base portion V, the floor slab F, and the veranda slab B can be continued by the continuous extension portion 202.

  Further, in the description of the embodiment according to the reinforcing bar construction method, only the case where the extending part is arranged in the vertical direction is shown, but the extending part is bent outside the annular part. In the case of using, the direction of the extending part extending from the bent part is adjusted to a desired direction. And by extending the direction to the same direction, as shown in FIG. 6 and FIG. 7, the extending portion can be arranged inside a horizontal structure such as a floor slab F. Further, the extending direction of the extending portion is not limited to either one of vertical and horizontal, and can be adjusted so as to be directed to the vertical direction, the floor slab direction, and the veranda slab direction. In such a case, a bar arrangement state as shown in FIG. 8 can be realized.

  As shown in FIG. 1, the reinforcing bar material of the present embodiment is illustrated with a deformed reinforcing bar as a representative example, but the reinforcing bar material is not limited to the deformed reinforcing bar, but other types of reinforcing bar materials. Can be used.

1, 1a, 1b, 1c, 1d, 1e, 1f, 1g, 101, 201 Annular portion 2, 2a, 2b, 2c, 2d, 2e, 2f, 2g, 102, 202 Extending portion 3 Overlapping portion 4, 41 , 42 Top muscle (lateral muscle)
5, 51, 52 Bottom muscle (lateral muscle)
6, 6a, 6b, 6c, 6d, 61, 62 Transverse bars 22, 122, 222 Curved portions 23, 123, 223 Straight portions 125, 225 Turned portion B Veranda slab D Protrusion length F Floor slab H1, H2 Cover dimension V Foundation part W Structural wall

Claims (8)

Reinforced concrete reinforcing bars constructed by bending or curving continuous reinforcing bar material, and encloses a space composed of multiple reinforcing bars to be placed inside the constructed reinforced concrete structure in the cross-sectional direction. A possible annular portion and a part of the reinforcing bar material forming the annular portion extending from the annular portion and having a structure different from the reinforced concrete structure constructed by the reinforcing bar surrounded by the annular portion. An extension portion arranged in the interior, and the annular portion is provided so that the vicinity of the tip of the reinforcing bar material overlaps a part of the reinforcing bar material, and the extension portion overlaps the annular portion. A reinforcing steel bar for reinforced concrete, characterized in that it extends outward from the annular part via a part. Reinforcing bars for reinforced concrete constructed by bending or bending continuous reinforcing bars, along the cross section of a space composed of multiple reinforcing bars to be laid inside the reinforced concrete structure to be constructed A substantially square annular portion that can be surrounded in the cross-sectional direction while abutting the outer edges of at least four reinforcing bars located on the outermost part, and a part of the reinforcing bar material forming the annular portion extends from the annular portion. And an extending portion arranged in a structure different from the reinforced concrete structure constructed by the reinforcing bar surrounded by the annular portion, and the annular portion is located near the tip of the reinforcing bar material. It is bent or curved at one corner of the substantially rectangular shape, and is provided so that a part of the reinforcing bar material overlaps in a range from the corner to the tip of the reinforcing bar material. Concrete reinforcing rebars via the turned portion characterized by comprising extends outward from the annular portion. The annular portion is a substantially rectangular annular portion formed along four sides of the rectangle, and the extending portion extends in the long side direction of the substantially rectangular shape formed by the annular portion. The reinforcing steel bar for reinforced concrete according to claim 1 or 2, which is an extension part. 4. The extension part according to claim 1, wherein the extension part is an extension part including a straight part having a predetermined extension length and a curved part in which the vicinity of the other end of the reinforcing bar material is curved. Reinforcing bars for reinforced concrete. The extension portion includes a straight portion having a predetermined extension length, a curved portion curved at the end of the predetermined extension length, and a distal end reaching the annular portion while continuing to the curved portion. The reinforcing reinforcing bar for reinforced concrete according to any one of claims 1 to 3, wherein the reinforcing reinforcing bar is an extended portion including a folded portion. 6. The reinforcing steel bar for reinforced concrete according to claim 1, wherein the extending portion is an extending portion whose angle is adjusted in an arbitrary direction outside the annular portion. A reinforcing bar construction method using the reinforcing steel reinforcing bar for reinforced concrete according to any one of claims 1 to 5, wherein a plurality of horizontal bars to be laid in the concrete for constructing a foundation beam or a structural wall are preliminarily provided in the annular portion. The structure in which the annular portion is disposed so as to surround a space constituted by a plurality of transverse stripes when the transverse stripe is installed at a predetermined position, and the extension portion is positioned above the annular portion. Reinforcing bar construction method, characterized in that the reinforcing bar is adjusted so that the bars are arranged inside. A reinforcing bar construction method using an annular reinforcing bar according to claim 6, wherein a plurality of transverse bars to be laid in the concrete for constructing a foundation beam or a structural wall are inserted in advance into the annular part, and the transverse bars are predetermined. A slab or structure in which the annular portion is disposed so as to surround a space constituted by a plurality of the transverse stripes and the linear portion constituting the extending portion is located above the annular portion. A reinforcing bar construction method characterized by being adjusted so that the bars are arranged inside the wall.

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