Support device and support method for shear reinforcement bars

Abstract

To provide a support device and a support method of a shear reinforcement which can smoothly arrange all the shear reinforcements between reinforcement concrete supports.SOLUTION: In construction of a reinforcement concrete beam, supports 11 of a supporting device 1 are installed at almost the same intervals in a vertical direction, upper sides of respective shear reinforcements 21 are suspended from suspension arms 13 mounted on mounting tables 12 of the upper ends of the supports 11, and respective upper side main reinforcements 22 are mounted so as to be arranged side by side at almost the same intervals in a traverse direction with respect to the mounting tables 12, in a state of being inserted into the insides of the respective shear reinforcements 21. When the respective suspension arms 13 are separated from the mounting tables 12, the upper sides of the respective shear reinforcements 21 are transferred to and suspended from respective upper side main reinforcements 22 on the mounting tables 12 from the respective suspension arms 13, the lower side main reinforcements 23 are mounted so as to be arranged side by side at almost the same intervals in a traverse direction with respect to the lower sides of the shear reinforcements 21 in a state of being inserted into the insides of the shear reinforcements 21, and the respective shear reinforcements 21 are arranged at almost the same intervals in a vertical direction with respect to the respective upper side and lower side main reinforcements 22, 23.SELECTED DRAWING: Figure 9

Description

Technical Field

[0001] The present invention relates to a support device and a support method for supporting shear reinforcement bars used during the construction of reinforced concrete beams.

Background Art

[0002] Generally, reinforced concrete columns extending in the vertical direction are connected by a reinforced concrete beam extending in the horizontal direction. Conventionally, since a shear load acts on the reinforced concrete beam, a plurality of upper and lower main reinforcement bars arranged along the reinforced concrete beam are arranged at upper and lower positions inside the reinforced concrete beam during construction so as to be surrounded by shear reinforcement bars (see Patent Document 1).

[0003] Such shear reinforcement bars are formed in a substantially rectangular frame shape, and since it is necessary to arrange a plurality of upper and lower main reinforcement bars at substantially equal intervals in the longitudinal direction that is the reinforcement direction, for example, at intervals of 150 mm, a plurality of them are prepared.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, a plurality of shear reinforcement bars required between reinforced concrete columns are supported by passing through a lead-out end obtained by leading out the reinforcement bars from the reinforced concrete column side to the reinforced concrete beam side.

[0006] In this case, since the multiple upper and lower main reinforcement bars will bend due to their own weight, they are supported by support devices installed at approximately equal intervals (for example, every 1500 mm) in the longitudinal direction of each upper and lower main reinforcement bar, so that they are arranged along the reinforced concrete beam.

[0007] However, if the ends of the reinforcing bars that are led from the reinforced concrete column to the reinforced concrete beam are supported by passing multiple shear reinforcements through them, the following problems arise.

[0008] In other words, while shear reinforcement can be smoothly placed from the end of the reinforcing bar to the first support device in the longitudinal direction, the first support device becomes an obstacle when placing shear reinforcement to the next support device in the longitudinal direction, and the same applies to subsequent support devices. Therefore, when placing shear reinforcement after the first support device, the number of obstructing support devices increases sequentially, and the shear reinforcement must be placed by successively maneuvering under these obstructing support devices. This makes it impossible to smoothly place multiple shear reinforcements after the first support device.

[0009] The present invention has been made in view of the above, and its objective is to provide a shear reinforcement support device and support method that allows for the smooth placement of all shear reinforcement bars without having to sequentially pass support devices that would get in the way between reinforced concrete columns. [Means for solving the problem]

[0010] To achieve the above objective, the present invention is based on a support device that supports multiple shear reinforcement bars arranged at approximately equal intervals in the longitudinal direction, surrounding multiple upper and lower main reinforcement bars that are arranged along the reinforcement beam at the upper and lower positions inside the reinforcement beam during construction. Furthermore, it includes vertically extending support columns installed at approximately equal intervals in the longitudinal direction for each of the upper main reinforcement bars, a mounting base extending horizontally perpendicular to the reinforcement direction of each upper main reinforcement bar at the upper end of the support columns, and the upper side of each of the shear reinforcement bars, which is detachably attached to the mounting base. Hanging The device includes a suspension arm that extends vertically to a higher position than the aforementioned mounting base so as to be lowered. The upper main reinforcement bars are placed on the aforementioned mounting base, with each of the upper main reinforcement bars inserted inside each of the shear reinforcement bars, and arranged in the horizontal direction. When the suspension arm is removed from the aforementioned mounting base, the upper edges of each of the shear reinforcement bars are transferred from the suspension arm to each of the upper main reinforcement bars, and the lower main reinforcement bars are placed in the horizontal direction with each of the lower main reinforcement bars inserted inside each of the shear reinforcement bars, and the suspension arm is removed from the aforementioned mounting base. Furthermore, the shear reinforcement bars are arranged at approximately equal vertical intervals relative to each of the upper and lower main reinforcement bars.

[0011] Alternatively, the suspension arm may extend to both sides in the vertical direction at a higher position than the base described above, and the upper sides of each shear reinforcement bar may be suspended from both sides in the vertical direction.

[0012] Furthermore, the suspension arms may be provided in multiple locations in the lateral direction such that the upper edges of each shear reinforcement bar are suspended at multiple locations in the lateral direction.

[0013] It is preferable to provide the support column with a connecting means for connecting the aforementioned mounting base to the support column in a way that allows the height to be changed vertically.

[0014] In contrast, to achieve the above objective, the present invention is based on a support method for supporting multiple shear reinforcement bars that are arranged to surround multiple upper and lower main reinforcement bars, which are arranged along the reinforced concrete beam at upper and lower positions inside the beam during construction, at approximately equal intervals in the longitudinal direction in which the reinforcement bars are arranged. Then, vertically extending support columns equipped with a mounting base at their upper ends are installed at approximately equal intervals in the longitudinal direction relative to each of the upper main reinforcement bars. Next, the upper edges of each shear reinforcement bar are suspended from a suspension arm that is detachably attached to the mounting base and extends vertically at a higher position than the mounting base. After that, each of the upper main reinforcement bars is inserted inside each of the shear reinforcement bars and placed on the mounting base in the lateral direction. Then, the upper edges of each shear reinforcement bar are transferred from the suspension arm to each upper main reinforcement bar to create a suspended state, and the lower main reinforcement bars are inserted inside each shear reinforcement bar and placed side by side in the horizontal direction relative to the lower edges of each shear reinforcement bar. After that, the shear reinforcement bars are arranged at approximately equal intervals in the vertical direction relative to each upper main reinforcement bar and each lower main reinforcement bar. [Effects of the Invention]

[0015] In short, during the construction of a reinforced concrete beam, support columns for the support device are installed at approximately equal intervals in the longitudinal direction corresponding to the reinforcement direction of each upper main reinforcement. Multiple shear reinforcement bars are suspended from suspension arms attached to mounting bases at the upper ends of these columns, and each upper main reinforcement bar is inserted inside each shear reinforcement bar and placed horizontally on the mounting base. When the suspension arms are detached from the mounting base, the upper edges of each shear reinforcement bar are transferred from the suspension arms to each upper main reinforcement bar and suspended, and each lower main reinforcement bar is inserted inside each shear reinforcement bar and placed horizontally on the lower edge of each shear reinforcement bar, so that each shear reinforcement bar is placed at approximately equal intervals in the longitudinal direction relative to each upper and lower main reinforcement bar.

[0016] In other words, by supporting multiple shear reinforcement bars with support devices installed at approximately equal intervals in the longitudinal direction of each upper and lower main reinforcement bar between reinforced concrete columns, it is possible to support the multiple shear reinforcement bars required between adjacent support devices with each individual support device. This eliminates the need to sequentially pass support devices that would get in the way when placing the shear reinforcement bars between reinforced concrete columns, allowing for the smooth placement of all shear reinforcement bars.

[0017] Furthermore, by suspending the upper edges of each shear reinforcement bar from both vertical sides of the suspension arms, which extend vertically at a higher position than the mounting base, it becomes possible to place shear reinforcement bars to each upper and lower main reinforcement bar supported by the support devices on both vertical sides, thereby reducing the amount of support required for the shear reinforcement bars supported on one vertical side of each support device. In addition, the suspension arms distribute the shear reinforcement bars to both vertical sides of the column, making the balance of the column approximately equal in the vertical direction, and effectively preventing the column from collapsing.

[0018] Furthermore, by suspending the upper edge of each shear reinforcement bar at multiple points in the lateral direction using multiple suspension arms, the upper edge of each shear reinforcement bar can be suspended in a stable state by each suspension arm.

[0019] Furthermore, by providing connecting means on the support columns that allow the height of the mounting platform to be changed vertically, the height of the mounting platform can be adjusted to the optimal position according to the size of the shear reinforcement bars, and shear reinforcement bars of any size can be placed on the mounting platform.

[0020] Furthermore, as a support method for supporting multiple shear reinforcement bars, multiple shear reinforcement bars can be supported between adjacent support devices installed at approximately equal intervals in the longitudinal direction of each upper and lower main reinforcement bar between reinforced concrete columns. This eliminates the need to sequentially pass support devices that would get in the way when arranging shear reinforcement bars between reinforced concrete columns, providing a support method that allows for the smooth arrangement of all shear reinforcement bars.

Brief Description of the Drawings

[0021] [Figure 1] It is a perspective view showing a state in which only the upper sides of the shear reinforcing bars are respectively suspended on one longitudinal side of the suspension arm of the support device according to the first embodiment of the present invention. [Figure 2] It is a side view of the support device of FIG. 1 seen from the lateral direction. [Figure 3] It is a plan view of the support device of FIG. 1 seen from above. [Figure 4] It is a front view of the support device of FIG. 1 seen from one longitudinal side. [Figure 5] It is a perspective view of the support device of FIG. 1 seen obliquely from above with the suspension arm removed from the mounting table. [Figure 6] It is a side view of one suspension arm of FIG. 5 seen from the lateral direction. [Figure 7] It is a perspective view of the suspension arm of FIG. 6 seen obliquely from above. [Figure 8] It is a perspective view showing a state before suspending the upper sides of the shear reinforcing bars on the suspension arm of the support device of FIG. 1. [Figure 9] It is a perspective view showing a state in which the upper sides of the shear reinforcing bars are respectively suspended on both longitudinal sides of the suspension arm of the support device of FIG. 8. [Figure 10] It is a perspective view showing a state in which four upper main bars are inserted inside the shear reinforcing bars and arranged side by side in the lateral direction on the mounting table of the support device of FIG. 9. [Figure 11] It is a perspective view showing a state in which the shear reinforcing bars are transferred from the suspension arm of the support device of FIG. 10 to each upper main bar of the mounting table. [Figure 12] It is a front view of the support device of FIG. 11 seen from one longitudinal side. [Figure 13] It is a perspective view showing a state in which the shear reinforcing bars transferred to each upper main bar of the mounting table of the support device of FIG. 11 are arranged substantially evenly on both longitudinal sides. [Figure 14] It is a perspective view showing a state in which a suspension arm is attached to the support device according to the second embodiment of the present invention. [Figure 15]Figure 14 is a front view of the support device as seen from one side in the vertical direction. [Figure 16] Figure 14 is a side view of the support device as seen from one side in the lateral direction. [Figure 17] Figure 14 is a side view of the support device as seen from the other side. [Figure 18] Figure 14 is a plan view of the support device as seen from above. [Figure 19] This is a perspective view showing a support device according to a third embodiment of the present invention with a suspension arm attached. [Figure 20] Figure 19 is a front view of the support device as seen from one side in the vertical direction. [Figure 21] Figure 19 is a side view of the support device as seen from one side in the lateral direction. [Figure 22] Figure 19 is a side view of the support device as seen from the other side. [Figure 23] Figure 19 is a plan view of the support device as seen from above. [Modes for carrying out the invention]

[0022] Hereinafter, embodiments of the present invention will be described based on the drawings.

[0023] Figure 1 is a perspective view showing the state in which the upper edges of each shear reinforcement bar are suspended only on one longitudinal side of the suspension arm of the support device according to the first embodiment of the present invention. Figure 2 is a side view of the support device of Figure 1 viewed from the side, Figure 3 is a top view of the support device of Figure 1 viewed from above, and Figure 4 is a front view of the support device of Figure 1 viewed from one longitudinal side. In Figures 1 to 4, the suspension state of each shear reinforcement bar on the other longitudinal side of the suspension arm is omitted in order to clarify the configuration of the support device.

[0024] As shown in Figures 1 to 4, 1 is a support device that supports multiple shear reinforcement bars 21, 21, ... during the construction of a reinforced concrete beam (not shown). Each shear reinforcement bar 21 is arranged to surround five upper main reinforcement bars 22, 22, ... and lower main reinforcement bars 23, 23, ... (shown in Figure 11), which are arranged along the reinforced concrete beam at the upper and lower positions inside the reinforced concrete beam being constructed, at approximately equal intervals (for example, about 150 mm) in the longitudinal direction (left-right direction in Figures 2 and 3) that is the direction of their arrangement. In this case, each shear reinforcement bar 21 is upset welded to one of its two long sides to form a roughly rectangular frame shape.

[0025] The support device 1 is installed at approximately equal intervals (for example, about 1500 mm) in the vertical direction relative to each of the upper and lower main reinforcement bars 22 and 23, in order to prevent bending caused by the weight of the upper and lower main reinforcement bars 22 and 23. This support device 1 is equipped with a support column 11 that extends in the vertical direction. The support column 11 is formed in a roughly L-shape in cross-section, and a roughly square base plate 111 is fixed to its lower end. In this case, the length of one side of the base plate 111 is set to approximately four times the length of one side of the cross-sectional shape of the support column 11, thereby suppressing the tilting of the support column 11 (support device 1).

[0026] Furthermore, the support device 1 includes a mounting base 12 that extends in a lateral direction (left-right direction in Figure 4) perpendicular to the reinforcement direction of each upper main reinforcement 22 at the upper end of the support column 11, and two suspension arms 13, 13 attached to this mounting base 12.

[0027] Figure 5 shows a perspective view from diagonally above with the suspension arm 13 removed from the mounting base 12 of the support device 1 in Figure 1. Figure 6 shows a side view of one of the suspension arms 13 in Figure 5, and Figure 7 shows a perspective view of the suspension arm 13 in Figure 6, viewed from diagonally above.

[0028] As shown in Figure 5, the mounting base 12 comprises a horizontal plate section 121 and a vertical plate section 122, which are bent at approximately right angles to each other, and extends laterally. The mounting base 12 also includes a vertical rod section 123, whose upper end is fixed to the center of the width direction on the back surface of the vertical plate section 122 and which extends downward. This vertical rod section 123 is made of reinforcing bar. Furthermore, projections 124, 124 are provided at both ends of the mounting base 12 in the width direction to prevent the upper main reinforcing bars 22 from falling when placed on the horizontal plate section 121.

[0029] Furthermore, the support column 11 is provided with a connecting means 14 that connects to the mounting base 12 so that its height can be changed in the vertical direction. The connecting means 14 comprises a roughly U-shaped closing device 141 whose ends are fixed so as to create a closed space at the upper end of the support column 11, and a bolt 142 that is screwed to the bottom of the closing device 141 and moves back and forth toward the corner of the support column 11. The lower part of the vertical rod portion 123 is inserted into the closed space between the corner of the support column 11 and the closing device 141, and is fixed to the upper end of the support column 11 by the forward movement of the bolt 142 at the insertion position.

[0030] As shown in Figures 6 and 7, each suspension arm 13 has a round bar-shaped vertical piece 131 that extends vertically at a height higher than the mounting base 12 so that the upper edges of each shear reinforcement bar 21 are suspended from the vertical direction, and a round bar-shaped vertical piece 132 that extends downward from the upper end of the vertical piece 131, with the upper end connected to the approximate center of the vertical piece 131, forming a roughly T-shape. In this case, both ends of the vertical piece 131 are curved upward in an approximately quarter-circle arc to prevent the upper edges of each shear reinforcement bar 21 from falling when suspended from the vertical piece 131.

[0031] The lower end of the vertical piece 132 is provided with a mounting device 15 for detachably attaching the suspension arm 13 to the mounting base 12. This mounting device 15 comprises an L-shaped member 151 with a substantially L-shaped cross-section that is bent to conform to the surfaces of the horizontal plate portion 121 and the vertical plate portion 122 of the mounting base 12; a thick plate-shaped spacer member 154 provided on the back side of the vertical plate portion 152 of the L-shaped member 151; a bolt 156 that is inserted from the back side through an insertion hole (not shown) provided in the spacer member 154 and whose tip protrudes to the front side of the vertical plate portion 152 through an insertion hole 155 provided in the lower part of the vertical plate portion 152; and a wing nut 157 that is screwed onto the tip of the bolt 156. The tip of the horizontal plate portion 153 of the L-shaped member 151 is curved approximately 180° in a hairpin shape and is designed to engage with the tip of the horizontal plate portion 121 of the mounting base 12.

[0032] In this case, the mounting fixture 15 is held in a state where the tip of the horizontal plate portion 153 of the L-shaped member 151 is engaged with the tip of the horizontal plate portion 121 of the mounting base 12 by tightening the wing nut 157, thereby attaching the suspension arm 13 to the mounting base 12. On the other hand, by loosening the wing nut 157, the engagement of the tip of the horizontal plate portion 153 of the L-shaped member 151 with the tip of the horizontal plate portion 121 of the mounting base 12 is released, allowing the suspension arm 13 to be removed from the mounting base 12.

[0033] Next, an example of the procedure for arranging each shear reinforcement bar 21 supported by the support device 1 during the construction of a reinforced concrete beam will be explained based on Figures 8 to 13.

[0034] Figure 8 is a perspective view showing the state before the upper edges of each shear reinforcement bar 21 are suspended from the suspension arm 13 of the support device 1 in Figure 1, and Figure 9 is a perspective view showing the state after the upper edges of each shear reinforcement bar 21 are suspended from both sides in the vertical direction of the suspension arm 13 of the support device 1 in Figure 8. Furthermore, Figure 10 is a perspective view showing the state after the four upper main reinforcement bars 22, 22, ... are inserted inside each shear reinforcement bar 21 and placed side by side on the mounting base 12 of the support device 1 in Figure 9, and Figure 11 is a perspective view showing the state after each shear reinforcement bar 21 has been transferred from the suspension arm 13 of the support device 1 in Figure 10 to each upper main reinforcement bar 22 on the mounting base 12. Furthermore, Figure 12 is a front view of the support device 1 of Figure 11 as seen from one side in the longitudinal direction, and Figure 13 is a perspective view showing the state in which each shear reinforcement bar 21 transferred to each upper main reinforcement bar 22 of the mounting base 12 of the support device 1 of Figure 11 is arranged substantially evenly on both sides in the longitudinal direction.

[0035] First, as shown in Figure 8, when constructing the reinforced concrete beam, support devices 1 are installed at approximately equal intervals (for example, about 1500 mm) in the vertical direction of each upper and lower main reinforcement bar 22, 23. At this time, two suspension arms 13 are attached to the lateral sides of the mounting base 12.

[0036] Next, as shown in Figure 9, five shear reinforcement bars 21, 21, ... are arranged vertically on both sides of each suspension arm 13, which extends vertically at a height higher than the mounting base 12 of the support device 1, and suspended from it, with the mounting base 12 in between.

[0037] Subsequently, as shown in Figure 10, the four upper main reinforcements 22, 22, ... are inserted inside each shear reinforcement 21 and placed on the horizontal plate portion 121 of the mounting base 12, arranged at approximately equal intervals in the lateral direction.

[0038] Then, as shown in Figures 11 and 12, the upper edges of each shear reinforcement bar 21 are transferred from each suspension arm 13 to each upper main reinforcement bar 22 on the mounting base 12 to create a suspended state. After that, the five lower main reinforcement bars 23, 23, ... are inserted inside each shear reinforcement bar 21 and placed horizontally at approximately equal intervals relative to the lower edge of each shear reinforcement bar 21. After transferring each shear reinforcement bar 21, or after placing each lower main reinforcement bar 23, the wing nuts 157 of the mounting fixture 15 are loosened, and the engagement of the tip of the horizontal plate portion 153 of the L-shaped member 151 with the tip of the horizontal plate portion 121 of the mounting base 12 is released, thereby removing each suspension arm 13 from the mounting base 12.

[0039] Subsequently, as shown in Figure 13, each shear reinforcement bar 21 is placed at approximately equal vertical intervals (for example, about 150 mm) relative to each upper main reinforcement bar 22 and each lower main reinforcement bar 23.

[0040] Therefore, in this embodiment, when constructing the reinforced concrete beam, the support columns 11 of the support device 1 are installed at approximately equal intervals in the vertical direction (reinforcement direction) of each upper main reinforcement 22, and the upper sides of five shear reinforcement bars 21, 21, ... are suspended from two suspension arms 13, 13 attached to the mounting base 12 at the upper end of the support columns 11, and each upper main reinforcement 22 is inserted inside each shear reinforcement bar 21 and placed on the mounting base 12 in an approximately equal-interval arrangement in the horizontal direction. Then, when each suspension arm 13 is detached from the mounting base 12, the upper edge of each shear reinforcement bar 21 is transferred from each suspension arm 13 to each upper main reinforcement bar 22 on the mounting base 12 and suspended, and each lower main reinforcement bar 23 is inserted inside each shear reinforcement bar 21 and placed in a line at approximately equal intervals horizontally relative to the lower edge of each shear reinforcement bar 21, so that each shear reinforcement bar 21 is arranged at approximately equal vertical intervals relative to each upper main reinforcement bar 22 and each lower main reinforcement bar 23.

[0041] In other words, since five shear reinforcement bars 21, 21, ... are supported on both sides in the vertical direction by support devices 1 installed at approximately equal intervals in the vertical direction between each upper and lower main reinforcement bar 22, 23 between reinforced concrete columns, it is sufficient to support the necessary shear reinforcement bars 21 between adjacent support devices 1. This eliminates the need to sequentially pass the support devices 1 that would get in the way when arranging the shear reinforcement bars 21 between reinforced concrete columns, and allows for the smooth arrangement of all the shear reinforcement bars 21, 21, ... between reinforced concrete columns.

[0042] Furthermore, since the upper edges of each shear reinforcement bar 21 are suspended from both sides in the vertical direction of each suspension arm 13, which extends vertically to a higher position than the mounting base 12, it becomes possible to place the shear reinforcement bars 21 to each upper and lower main reinforcement bar 22, 23 supported by the support devices 1 on both sides in the vertical direction, thereby reducing the amount of support that the shear reinforcement bars 21 must provide on one side in the vertical direction of each support device 1. Moreover, the shear reinforcement bars 21 are distributed to both sides in the vertical direction of the column 11 by each suspension arm 13, making the balance of the column 11 approximately equal in the vertical direction, and effectively preventing the column 11 from collapsing.

[0043] Furthermore, since the upper edge of each shear reinforcement bar 21 is suspended at two points in the lateral direction by two suspension arms 13, 13, the upper edge of each shear reinforcement bar 21 can be suspended in a stable state by each suspension arm 13.

[0044] Furthermore, since the support column 11 is provided with a connecting means 14 that allows the mounting base 12 to be connected in a way that allows its height to be changed vertically, the mounting base 12 can be adjusted to the optimal position according to the size of the shear reinforcement bars 21, and shear reinforcement bars of any size can be placed on the mounting base 12.

[0045] Furthermore, as a support method for supporting the five shear reinforcement bars 21, 21, ..., the necessary number of shear reinforcement bars 21 can be supported between adjacent support devices 1, which are installed at approximately equal intervals in the vertical direction of each upper and lower main reinforcement bar 22, 23 between the reinforced concrete columns. This eliminates the need to sequentially pass the support devices 1 that would get in the way when arranging the shear reinforcement bars 21 between the reinforced concrete columns, and provides a support method that allows for the smooth arrangement of all the shear reinforcement bars 21, 21, ... between the reinforced concrete columns.

[0046] Next, a second embodiment of the present invention will be described based on the drawings.

[0047] In this embodiment, the configuration of the mounting base and suspension arm has been modified. Note that the other components, excluding the mounting base and suspension arm, are the same as in the first embodiment; therefore, the same reference numerals are used for the same parts, and their detailed descriptions are omitted.

[0048] Figure 14 is a perspective view showing the support device according to the second embodiment of the present invention with a suspension arm attached, and Figure 15 is a front view of the support device of Figure 14 viewed from one side in the vertical direction. Furthermore, Figure 16 is a side view of the support device of Figure 14 viewed from one side in the horizontal direction, and Figure 17 is a side view of the support device of Figure 14 viewed from the other side in the horizontal direction. In addition, Figure 18 is a plan view of the support device of Figure 14 viewed from above.

[0049] In other words, as shown in Figures 14 to 18, the support device 3 comprises a mounting base 32 extending in a lateral direction (left-right direction in Figures 16 and 17) perpendicular to the reinforcement direction of each upper main reinforcement 22 at the upper end of the support column 11, and a single suspension arm 33 attached to this mounting base 32.

[0050] The mounting base 32 comprises a flat horizontal plate section 321 and a vertical plate section 322, which are bent at approximately right angles to each other, and extends laterally. The mounting base 32 also has a vertical rod section 123 that extends downward, with its upper end fixed at the center of the width direction on the back surface of the vertical plate section 322. Furthermore, projections 324, 324 are provided at both lateral ends of the mounting base 32 to prevent the upper main reinforcement bars 22 from falling when placed on the horizontal plate section 321. In this case, the mounting base 32 is set to be short in the lateral direction because the number of upper main reinforcement bars 22 placed on the horizontal plate section 321 is limited to a small amount (for example, about 2 bars).

[0051] The suspension arm 33 is formed in a roughly T-shape and has a roughly horizontal, flat vertical plate 331 that extends vertically at a higher position than the mounting base 32 so that the upper edges of each shear reinforcement bar 21 are suspended from it from the vertical direction, and a reinforcing bar-like vertical piece 332 that extends downward and whose upper end is connected to the approximate center of the back surface of the vertical plate 331. In this case, both ends of the vertical plate 331 are bent upward at approximately a right angle to prevent the upper edges of each shear reinforcement bar 21 from falling when they are suspended from the vertical plate 331. Furthermore, the vertical plate 331 has sufficient width in the vertical direction and has sufficient holding performance when the upper edges of each shear reinforcement bar 21 are suspended from it.

[0052] The lower end of the vertical piece 332 is provided with a mounting device 35 for detachably attaching the suspension arm 33 to the mounting base 32. This mounting device 35 comprises a roughly U-shaped closing device 351, whose ends are fixed so as to create a closed space at the center of the width direction of the surface of the vertical plate portion 322 of the mounting base 32, and a bolt material 352 screwed to the bottom of the closing device 351.

[0053] The fastener 351 is slightly bent at both ends to narrow the gap between them, and its bottom is attached to the surface of the vertical plate portion 322 of the mounting base 32 so that it is approximately parallel to the vertical plate portion 322 of the mounting base 32. The lower part of the vertical piece 332 is inserted into the closed space between the vertical plate portion 322 of the mounting base 32 and the fastener 351, and is fixed in that position by being pressed against the vertical plate portion 322 of the mounting base 32 by the advancement of the bolt material 352.

[0054] In this case, the mounting fixture 35 is loosened by the retraction of the bolt 352, which releases the pressure of the vertical piece 332 of the suspension arm 33 against the vertical plate portion 322 of the mounting base 32, allowing the suspension arm 33 to be removed from the mounting base 32.

[0055] Next, an example of the procedure for arranging each shear reinforcement bar 21 supported by the support device 1 during the construction of a reinforced concrete beam will be explained.

[0056] First, when constructing the reinforced concrete beam, support devices 1 are installed at approximately equal intervals in the vertical direction of each upper and lower main reinforcement bar 22, 23, and a single suspension arm 33 is attached to the horizontal center of the mounting base 32.

[0057] Next, multiple shear reinforcement bars 21, 21, ... are arranged vertically on both sides of the suspension arm 33, which extends vertically at a higher position than the mounting base 32, and suspended from it, with their upper edges aligned vertically.

[0058] Subsequently, with the two upper main reinforcements 22, 22 inserted inside each shear reinforcement 21, the platform 32 is placed on the horizontal plate portion 321 of the platform 32, side by side at both ends in the lateral direction.

[0059] Next, the upper edges of each shear reinforcement bar 21 are transferred from the suspension arm 33 to each upper main reinforcement bar 22 on the mounting base 32 to create a suspended state. Then, two lower main reinforcement bars 23, 23, the same number as the upper main reinforcement bars 22, are inserted inside each shear reinforcement bar 21 and placed side by side at both ends of the lower edge of each shear reinforcement bar 21. After transferring each shear reinforcement bar 21, or after placing each lower main reinforcement bar 23, the bolt material 352 of the mounting fixture 35 is moved backward to loosen it, and the pressure of the vertical piece 332 of the suspension arm 33 on the vertical plate portion 322 of the mounting base 32 is released, thereby removing the suspension arm 33 from the mounting base 32.

[0060] Subsequently, each shear reinforcement bar 21 is placed at approximately equal vertical intervals (for example, about 150 mm) relative to each upper main reinforcement bar 22 and each lower main reinforcement bar 23.

[0061] Therefore, in this embodiment, when constructing the reinforced concrete beam, support columns 11 of the support device 1 are installed at approximately equal intervals in the vertical direction of each upper main reinforcement 22, and the upper sides of multiple shear reinforcement bars 21, 21, ... are suspended from a single suspension arm 33 attached to a mounting base 12 at the upper end of the support column 11, and each upper main reinforcement bar 22 is inserted inside each shear reinforcement bar 21 and placed on the mounting base 32 in a line at both ends in the horizontal direction. Then, when the suspension arm 33 is detached from the mounting base 32, the upper edges of each shear reinforcement bar 21 are transferred from the suspension arm 33 to the upper main reinforcement bars 22 on the mounting base 32 and suspended, and the lower main reinforcement bars 23 are inserted inside each shear reinforcement bar 21 and placed side by side at both ends in the lateral direction relative to the lower edge of each shear reinforcement bar 21, so that each shear reinforcement bar 21 is arranged at approximately equal vertical intervals relative to each upper main reinforcement bar 22 and each lower main reinforcement bar 23.

[0062] In other words, since multiple shear reinforcement bars 21, 21, ... are supported on both sides in the vertical direction by support devices 1 installed at approximately equal intervals in the vertical direction between each upper and lower main reinforcement bar 22, 23 between reinforced concrete columns, it is sufficient to support the necessary shear reinforcement bars 21 between adjacent support devices 1. This eliminates the need to sequentially pass the support devices 1 that would get in the way when arranging the shear reinforcement bars 21 between reinforced concrete columns, allowing for the smooth arrangement of all shear reinforcement bars 21, 21, ... between reinforced concrete columns. Moreover, it is possible to provide a support method that allows for the smooth arrangement of all shear reinforcement bars 21, 21, ... between reinforced concrete columns.

[0063] Furthermore, the vertical plate 331 of the suspension arm 33 has sufficient width in the vertical direction to provide adequate holding performance when the upper edge of each shear reinforcement bar 21 is suspended. Therefore, even a single arm can stably hold each shear reinforcement bar 21, and the cost can be reduced by reducing the number of parts.

[0064] Next, a third embodiment of the present invention will be described based on the drawings.

[0065] In this embodiment, the configuration of the mounting base and suspension arm has been modified. Note that the other components, excluding the mounting base and suspension arm, are the same as in the first embodiment; therefore, the same reference numerals are used for the same parts, and their detailed descriptions are omitted.

[0066] Figure 19 is a perspective view showing a support device according to the third embodiment of the present invention with a suspension arm attached, and Figure 20 is a front view of the support device of Figure 19 viewed from one side in the vertical direction. Furthermore, Figure 21 is a side view of the support device of Figure 19 viewed from one side in the horizontal direction, and Figure 22 is a side view of the support device of Figure 19 viewed from the other side in the horizontal direction. In addition, Figure 23 is a plan view of the support device of Figure 19 viewed from above.

[0067] In other words, as shown in Figures 19 to 23, the support device 4 comprises a mounting base 42 extending in a lateral direction (left-right direction in Figures 21 and 22) perpendicular to the reinforcement direction of each upper main reinforcement 22 at the upper end of the support column 11, and a single suspension arm 43 attached to this mounting base 42.

[0068] The mounting base 42 comprises a flat horizontal plate section 421 and a vertical plate section 422, which are bent at approximately right angles to each other, and extends laterally. The mounting base 42 also has a vertical rod section 123 that extends downward, with its upper end fixed at the center of the width direction on the back surface of the vertical plate section 422. Furthermore, projections 424, 424 are provided at both lateral ends of the mounting base 42 to prevent the upper main reinforcement bars 22 from falling when placed on the horizontal plate section 421. In this case, the mounting base 42 is set to a sufficient length in the lateral direction because the four upper main reinforcement bars 22 are placed on the horizontal plate section 421 at equal intervals in the lateral direction.

[0069] The suspension arm 43 has a pair of reinforcing bar-like horizontal vertical pieces 431, 431 that extend vertically at a higher position than the mounting base 42 so that the upper edges of each shear reinforcement bar 21 are suspended from the vertical direction, a reinforcing bar-like horizontal piece 432 that extends horizontally with both vertical ends connected at approximately the center of the lower surface of the two vertical pieces 431, 431, and a reinforcing bar-like vertical piece 433 that extends downward with its upper end connected at the horizontal center of the horizontal piece 432, and is formed in an approximately H shape in plan view. In this case, both ends of each vertical piece 431 are bent upward at approximately a right angle to prevent the upper edges of each shear reinforcement bar 21 from falling when they are suspended from each vertical piece 431.

[0070] The lower end of the vertical piece 432 is provided with a mounting bracket 35 for detachably attaching the suspension arm 43 to the mounting base 42. In this case, the pair of horizontal vertical pieces 431, 431 can be attached to and detached from the mounting base 42 solely by tightening and loosening the bolts 352 of the mounting bracket 35 at the lower end of the vertical piece 432.

[0071] Next, an example of the procedure for arranging each shear reinforcement bar 21 supported by the support device 1 during the construction of a reinforced concrete beam will be explained.

[0072] First, when constructing the reinforced concrete beam, support devices 1 are installed at approximately equal intervals in the vertical direction of each upper and lower main reinforcement bar 22, 23, and a vertical piece 433 of a single suspension arm 43 is attached to the horizontal center of the mounting base 42.

[0073] Next, multiple shear reinforcement bars 21, 21, ... are arranged vertically on both sides of the suspension arm 43, which extends vertically at a higher position than the mounting base 42, and suspended from it, with their upper edges aligned vertically.

[0074] Subsequently, the four upper main reinforcements 22, 22, ... are inserted inside each shear reinforcement 21 and placed on the horizontal plate portion 421 of the mounting base 42 at equal intervals in the lateral direction.

[0075] Next, the upper edges of each shear reinforcement bar 21 are transferred from the suspension arm 43 to each upper main reinforcement bar 22 on the mounting base 42 to create a suspended state. Then, four lower main reinforcement bars 23, 23, ..., the same number as the upper main reinforcement bars 22, are inserted inside each shear reinforcement bar 21 and placed on the lower edge of each shear reinforcement bar 21 at equal intervals in the lateral direction. After transferring each shear reinforcement bar 21, or after placing each lower main reinforcement bar 23, the bolt material 352 of the mounting fixture 35 is moved backward to loosen it, and the pressure of the vertical piece 432 of the suspension arm 43 on the vertical plate portion 422 of the mounting base 42 is released, thereby removing the suspension arm 43 from the mounting base 42.

[0076] Subsequently, each shear reinforcement bar 21 is placed at approximately equal vertical intervals (for example, about 150 mm) relative to each upper main reinforcement bar 22 and each lower main reinforcement bar 23.

[0077] Therefore, in this embodiment, when constructing the reinforced concrete beam, the support columns 11 of the support device 1 are installed at approximately equal intervals in the vertical direction of each upper main reinforcement 22, and the upper sides of multiple shear reinforcement bars 21, 21, ... are suspended so as to straddle the vertical pieces 431, 431 of the suspension arm 43 attached to the mounting base 42 at the upper end of the support column 11, and each upper main reinforcement 22 is inserted inside each shear reinforcement bar 21, and the beams are placed on the mounting base 42 in an orderly fashion at equal intervals in the horizontal direction. Then, when the suspension arm 43 is detached from the mounting base 42, the upper edges of each shear reinforcement bar 21 are transferred from the suspension arm 43 to the upper main reinforcement bars 22 on the mounting base 42 and suspended, and the lower main reinforcement bars 23 are inserted inside each shear reinforcement bar 21 and placed side by side at equal intervals in the horizontal direction relative to the lower edge of each shear reinforcement bar 21, so that each shear reinforcement bar 21 is arranged at approximately equal intervals in the vertical direction relative to each upper main reinforcement bar 22 and each lower main reinforcement bar 23.

[0078] In other words, since multiple shear reinforcement bars 21, 21, ... are supported on both sides in the vertical direction by support devices 1 installed at approximately equal intervals in the vertical direction between each upper and lower main reinforcement bar 22, 23 between reinforced concrete columns, it is sufficient to support the necessary shear reinforcement bars 21 between adjacent support devices 1. This eliminates the need to sequentially pass the support devices 1 that would get in the way when arranging the shear reinforcement bars 21 between reinforced concrete columns, allowing for the smooth arrangement of all shear reinforcement bars 21, 21, ... between reinforced concrete columns. Moreover, it is possible to provide a support method that allows for the smooth arrangement of all shear reinforcement bars 21, 21, ... between reinforced concrete columns.

[0079] Furthermore, since the pair of horizontal vertical pieces 431, 431 can be attached to and detached from the mounting base 42 solely by tightening and loosening the bolts 352 of the mounting fixture 35 at the lower end of the vertical piece 432, the attachment and detachment of the suspension arm 43 from the mounting base 42 can be performed easily and quickly.

[0080] It should be noted that the present invention is not limited to the embodiments described above, but encompasses various other modifications. For example, in the first and third embodiments, suspension arms 13 and 43 having two vertical pieces 131 and 431 in the lateral direction were used, but suspension arms having three or more vertical pieces in the lateral direction may also be used.

[0081] Furthermore, in each of the above embodiments, each shear reinforcement bar 21 was formed in a substantially rectangular frame shape by upset welding, but the shear reinforcement bars may also be formed in a substantially rectangular frame shape by flash welding, flare welding, or the like. [Explanation of Symbols]

[0082] 1 Support device 11 Posts 12 Mounting platform 13. Suspension Arm 14 Connection means 21 Shear reinforcement bars 22 Upper main reinforcement 23 Lower main reinforcement 32 Mounting platform 33 Suspension Arm 42 Mounting platform 43 Suspension Arm

Claims

1. A support device for supporting multiple shear reinforcement bars that are arranged at approximately equal intervals in the longitudinal direction, surrounding multiple upper and lower main reinforcement bars that are arranged along the reinforcement beam at the upper and lower positions inside the reinforced concrete beam during construction, wherein the shear reinforcement bars are arranged to surround the multiple upper and lower main reinforcement bars that are arranged along the reinforcement beam at the upper and lower positions inside the reinforced concrete beam, Each of the aforementioned upper main reinforcements is provided with vertically extending support columns installed at approximately equal intervals in the vertical direction, A mounting platform extending in a lateral direction perpendicular to the reinforcement direction of each upper main reinforcement at the upper end of the support column, A suspension arm is detachably attached to the aforementioned mounting base and extends vertically at a higher position than the aforementioned mounting base so as to suspend the upper edges of each of the shear reinforcement bars, Equipped with, On the aforementioned mounting platform, each of the upper main reinforcements is inserted inside each of the shear reinforcements and arranged in the lateral direction. When the suspension arm is detached from the base described above, The upper side of each shear reinforcement is transferred from the suspension arm to each of the upper main reinforcements, Each of the lower main reinforcements is inserted inside each of the shear reinforcements and arranged in the lateral direction with respect to the lower edge of each of the shear reinforcements. A support device for shear reinforcement bars, characterized in that each of the shear reinforcement bars is arranged at substantially equal intervals in the longitudinal direction relative to each of the upper main reinforcement bars and each of the lower main reinforcement bars.

2. The shear reinforcement support device according to claim 1, wherein the suspension arm extends to both sides in the vertical direction at a higher position than the base described above, and the upper sides of each shear reinforcement are suspended on both sides in the vertical direction.

3. The shear reinforcement support device according to claim 1 or claim 2, wherein the suspension arms are provided in multiple locations in the lateral direction so that the upper edges of each shear reinforcement are suspended at multiple locations in the lateral direction.

4. The shear reinforcement support device according to claim 1 or claim 2, wherein the support column is provided with a connecting means for connecting the aforementioned mounting base to the support column so as to be able to change its height in the vertical direction.

5. A support method for supporting multiple shear reinforcement bars that are arranged at approximately equal intervals in the longitudinal direction, surrounding multiple upper and lower main reinforcement bars arranged along the reinforcement beam at the upper and lower positions inside the reinforcement beam during construction, the reinforcement method being provided. After installing vertically extending support columns, each equipped with a mounting base at its upper end, at approximately equal intervals in the vertical direction relative to each of the upper main reinforcements, The upper edges of each shear reinforcement bar are suspended from a suspension arm that is detachably attached to the mounting base and extends vertically at a higher position than the mounting base. After that, with each of the upper main reinforcements inserted inside each of the shear reinforcements, they are placed on the aforementioned mounting base in the lateral direction, After transferring the upper edge of each shear reinforcement bar from the suspension arm to each upper main reinforcement bar, the suspension arm is removed from the mounting base described above, and each lower main reinforcement bar is inserted inside each shear reinforcement bar and placed side by side in the lateral direction relative to the lower edge of each shear reinforcement bar. A method for supporting shear reinforcement bars, characterized in that the shear reinforcement bars are then arranged at approximately equal intervals in the longitudinal direction relative to the upper main reinforcement bars and the lower main reinforcement bars.

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