Hairpin-shaped rebar fixture for beam reinforcement assembly column

Abstract

To provide a fixture capable of easily attaching and fixing a hairpin-shaped rebar on an angle column for beam reinforcement assembly of a reinforcement concrete beam.SOLUTION: In a beam assembly method comprising: horizontally attaching a hairpin-shaped rebar C on an angle column A1 of a beam reinforcement assembly column erected with intervals in a longitudinal direction of a beam to temporarily place a long beam upper main bar; attaching set-up bars D on both sides of the hairpin-shaped rebar to be arranged along both sides of the beam; and connecting consecutively with intervals lower bars of stirrup bars to hold an opening in an erected posture along the set-up bars, a fixture to attach and fix the hairpin-shaped rebar to the angle column is provided with a fixing part 15 clamping a front and rear of an edge of one flange part B of two flange parts B, B' forming the angle column by fastening with a bolt 13, and a mount part 16 on which the hairpin-shaped rebar is mounted.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] This relates to a fixing bracket that attaches and fixes a kanzashi bar, on which a step bar for attaching a lower reinforcing bar of a stirrup bar is placed, to an angle support made of an angle material of a beam reinforcing bar assembly support in order to arrange the step bar for attaching the lower reinforcing bar of a reinforced concrete beam in parallel at a predetermined height on both sides in the longitudinal direction of the beam. [Background technology]

[0002] As an example of a method for assembling the beam rebars of a reinforced concrete beam, as shown in Figures 9(a1) and (a2), there is a method in which the beam rebar assembly supports A are arranged in parallel at appropriate intervals along the longitudinal direction of the beam, and the kanzashi bars C are welded and fixed to the flanges of the angle supports A1 of those beam rebar assembly supports so that they are arranged horizontally at a specified height, as shown in Figures 10(b1) and (b2). Another method is to use a ready-made metal fitting as shown in Figures 10(b1) and (b2), to loosely fit an approximately U-shaped body into the angle support A1 with the kanzashi bars C inserted, and to fix it by tightening bolts at an appropriate height.

[0003] In either method, next, the preparation bars D are placed on both sides of the kanzashi bars C and fixed with a tie wire or the like. The stirrup bars are arranged so as to surround the beam main bars from above and below. First, the lower bars of the roughly U-shaped stirrup bars, which are divided into two, are tied to the preparation bars with a tie wire or the like so as to surround the beam bottom main bars and are arranged in an upright state. In the same way, the lower bars of the stirrup bars are spaced apart and connected to the preparation bars installed along both sides of the beam. After the pressure-resistant plate around the beam is arranged, concrete is poured, and the lower sides of the beam bottom main bars and the lower bars of the stirrup bars are buried. After the beam top main bars are placed on the angle material installed at the upper end of the angle support, the upper bars of the stirrup bars are dropped from above and fixed to the lower bars with a tie wire or the like. Summary of the Invention [Problem to be solved by the invention]

[0004] However, the method of welding the bar to the angle support as shown in Figures 9(a1) and (a2) had problems such as the labor required to perform the welding, the labor required to bring in the welding machine for the complicated reinforcing bar arrangement work, and the inability to adjust the height after welding.

[0005] In addition, as shown in Figures 10(b1) and (b2), in the method using prefabricated metal fittings, the fitting is inserted from the open part of the roughly U-shaped main body toward the support part of the angle post, and the bar is inserted into the through holes provided at both ends of the open part, and the bolt at the base end is tightened so that the tip of the bolt abuts against the inner surface of the angle material and is fixed in a state where it is sandwiched between the bar and the bar.

[0006] The angle support is configured so that an upper support made of reinforcing bar with an angle iron or reinforcing bar at its upper end, which serves as a horizontal member for placing and supporting the main reinforcement on the beam, can be slid up and down on the inside, and by sliding this upper support up and down, the height of the main reinforcement on the beam can be adjusted.

[0007] In other words, when there is a part where the rebar of the angle column and the upper column overlap, and it is necessary to attach the prefabricated metal fitting to that position, when the bolt is tightened, the tip of the bolt abuts on the arc surface of the outer periphery of the rebar, making it very unstable and unreliable for secure fixation. In addition, there is a problem that the height of the upper column cannot be adjusted after the bolt is tightened.

[0008] The present invention has been made in consideration of the above-mentioned problems in the conventional art, and has as its object to provide a fixing bracket that enables easy and hassle-free attachment and fixation of kanzashi bars to angle supports in the assembly of beam reinforcing bars in reinforced concrete beams. [Means for solving the problem]

[0009] The fixing hardware for solving the above problems is a method of assembling a beam in which kanzashi rebars are attached horizontally to angle supports of beam rebar assembly supports that are erected at intervals in the longitudinal direction of a beam in order to temporarily place main rebars on a long beam, and preparation rebars are attached to both sides of the kanzashi rebars and installed along both sides of the beam, and the lower rebars of stirrup rebars that are held in an upright position with their open parts facing upwards are installed at a distance along the preparation rebars, and the fixing hardware for attaching and fixing the kanzashi rebars to the angle supports is provided with a fixing part that clamps the front and back of the edge of one of the two flange parts that form the angle support by tightening bolts, and a placement part on which the kanzashi rebars are placed.

[0010] The fixing metal fitting may have the placement portion provided at both ends in a direction perpendicular to a direction in which the clamping portion is fastened to the flange portion.

[0011] The fixing bracket may be provided with a fall prevention portion on the mounting portion to prevent the rivet from falling off.

[0012] With respect to the fastening metal fitting, the fall-off prevention portion may be a protrusion extending from the placement portion.

[0013] With respect to the fastening metal fitting, the fall-off prevention portion may be a concave recess provided in the placement portion. Effect of the Invention

[0014] According to the present invention, the end edge of the flange portion of the angle support is clamped and fixed with a bolt, and the bar is placed on the mounting portion and secured with a cable tie, making it possible to easily attach the bar to a specified height position and eliminating the need for welding.

[0015] In addition, since the bolt can be tightened to the edge of one of the two flange portions that form the angle support, even when the angle support and the reinforcing bars of the upper support are in a position where they overlap, the bolt can be securely fixed without hitting the reinforcing bars of the upper support.

[0016] Since the bolts are tightened and fixed, if the height needs to be readjusted, the bolts can be easily loosened to adjust the height. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a perspective view showing a first embodiment of the present invention. [Diagram 2] FIG. 1 is a perspective view showing an installation state of a first embodiment of the present invention. [Diagram 3] FIG. 11 is a perspective view showing a second embodiment of the present invention. [Figure 4] FIG. 11 is a perspective view showing an installation state of the second embodiment of the present invention. [Diagram 5] FIG. 1 is a perspective view showing a first construction procedure using a second embodiment of the present invention. [Figure 6] FIG. 11 is a perspective view showing a second construction procedure using the second embodiment of the present invention. [Figure 7] FIG. 11 is a perspective view showing a construction procedure 3 using the second embodiment of the present invention. [Figure 8] FIG. 11 is a perspective view showing a fourth construction procedure using the second embodiment of the present invention. [Figure 9] FIG. 1 is a perspective view showing a conventional method for fixing the Kanzashi muscle. [Figure 10] FIG. 1 is a perspective view showing a conventional method for fixing the Kanzashi muscle. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fastener of the present invention will be described in detail with reference to the drawings.

[0019] The following description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, its application, or its uses.

[0020] 1 and 2 show a first embodiment of a fixing bracket. The fixing bracket of the present invention is for attaching and fixing a horizontal bar C to an angle support A1 that stands vertically. The fixing bracket of the present invention is attached to one of the flange parts B, B' that form the L-shaped angle support A1.

[0021] The fixing bracket of the present invention comprises a bracket body 10 and a bolt 13. The bracket body 10 has a base plate 11 made of thin steel plate bent into a U-shape with one end provided as a contact piece 12a that contacts the flange portion B of the angle support A1, and a fixed piece 12b provided on the other end so that the bolt 13 can advance and retreat toward the contact piece 12a. A screw hole 14 into which the bolt 13 is screwed is provided in the fixed piece 12b. The bolt 13 is inserted from the fixed piece 12b toward the contact piece 12a.

[0022] That is, by tightening the bolt 13 with the abutment piece 12a abutting against the flange portion B of the angle support A1, it becomes the fixing portion 15 that can clamp the front and back of the edge of the flange portion B. The bolt 13 is inserted in the front-back direction of the flange portion B, and its tip abuts against one side of the edge of the flange portion B. The abutment piece 12a abuts against the other side of the edge of the flange portion B.

[0023] The metal fitting body 10 is provided with mounting portions 16, 16 on which the tip of the abutment piece 12a of the base plate 11 is bent outward again to place the kanzashi muscle C. The mounting portion 16 is provided on a mounting piece 18 extending from the abutment piece 12a in the tightening direction to the flange portion B of the fixed part 15, i.e., in the insertion direction of the bolt 13. The mounting piece 18 has mounting portions 16, 16 on both ends in a direction perpendicular to the tightening direction to the flange portion B of the fixed part 15. In this embodiment, the mounting portions 16, 16 are provided on both the upper and lower ends of the mounting piece 18, and the kanzashi muscle C can be placed on the upper mounting portion 16.

[0024] The mounting portions 16, 16 have a concave recess 17 into which the Kanzashi muscle C fits, preventing the Kanzashi muscle C from falling off.

[0025] 3 and 4 show embodiment 2 of the fixing bracket. In embodiment 2, the shape of the bracket body differs from embodiment 1. In the bracket body 20, the upper and lower ends of a base plate 21 made of thin steel plate are bent to provide contact pieces 22a, 22a that contact the flange portion B of the angle support A1, the base end side of the base plate 21 is bent into an L shape to provide a fixing piece 22b so that a bolt 23 can advance and retreat toward the contact pieces 22a, 22a, and a screw hole 24 for screwing the bolt 23 is provided in the fixing piece 22b.

[0026] That is, by tightening the bolt 23 in a state where the abutment pieces 22a, 22a are in contact with the flange portion B of the angle support A1, a fixing portion 25 capable of clamping the flange portion B is formed.

[0027] The tip side of the abutment pieces 22a, 22a of the base plate 21 are mounting parts 26, 26 on which the kanzashi muscle C can be placed. The mounting parts 26 extend from the abutment pieces 22a in the tightening direction to the flange part B of the fixing part 25, that is, in the insertion direction of the bolt 23, and by providing protrusions 27, 27 extending in the vertical direction at the tip, the kanzashi muscle C is prevented from falling off.

[0028] Reference numeral 28 denotes an elliptical through hole provided in the base plate 21, which serves to catch the binding wire when fixing the bar C and also to facilitate filling with concrete.

[0029] Next, a method of using the fixing fixture of the present invention will be described with reference to a second embodiment.

[0030] 5 to 8 are perspective views showing steps 1 to 4 of assembling a beam reinforcing bar using the fixing bracket of the present invention.

[0031] Figure 5 shows construction procedure 1, in which the beam rebar assembly supports A are arranged in parallel at appropriate intervals along the longitudinal direction of the beam. In Figure 5, two beam rebar assembly supports A are arranged in parallel, but if the beam width is large, the number of supports may be increased appropriately.

[0032] The front and back of the edge of the flange part B of the angle support A1 of the beam rebar assembly support A are clamped by the fixing parts 25 of the metal fitting body 20 to fix the metal fitting body 20. The mounting height of the metal fitting body 20 can be easily adjusted by loosening the bolts 23. When three or more beam rebar assembly supports A are arranged in parallel, they do not necessarily have to be mounted in two places, but can be mounted as appropriate taking into account the weight of the rebar to be supported.

[0033] Next, the skewered wire C is placed on the mounting portion 26 of the metal fitting body 20 and secured with a binding wire. At this time, the protrusion 27 of the metal fitting body 20 prevents the skewered wire C from falling off the mounting portion 26, and since the skewered wire can be temporarily placed on the mounting portions 26, 26, the worker can use both hands to secure the skewered wire.

[0034] After fixing multiple bar reinforcement bars C, fix the preparation bars D with tie wire along the longitudinal direction of the beam.

[0035] Figure 6 shows construction procedure 2, where the open part of the roughly U-shaped stirrup reinforcing bar E1 is inserted from below the preparation bar D with the open part facing upward, and the hook part of the stirrup reinforcing bar E1 is hooked onto the preparation bar D and temporarily placed, and the spacing between the stirrup reinforcing bars E1, E1 is adjusted appropriately and fixed with a tie wire. The beam bottom main bar F2 is temporarily placed on the stirrup reinforcing bar E1, and the spacing between the beam bottom main bars F2, F2 is adjusted appropriately and fixed with a tie wire.

[0036] Figure 7 shows construction procedure 3, in which pressure-resistant plate reinforcing bars G1 are placed around the beam. By dividing the stirrup bars into upper and lower sections, the height of the beam reinforcing bars can be lowered during work, preventing accidents such as the beam reinforcing bars tipping over or collapsing during pressure-resistant plate reinforcing bar placement work.

[0037] Figure 8 shows construction procedure 4. After pouring and hardening the concrete under the beam and the pressure-resistant plate, the upper part of the beam is reinforced. The height of the upper support A2 of the beam reinforcement assembly support A is adjusted, but since the bolt 23 of the fixing bracket does not come into contact with the rebar of the upper support A2, the height of the upper support A2 can be adjusted even after the fixing bracket is installed. An angle bar is fixed to the holding part of the upper support A2, and the upper main reinforcement F1 of the beam is temporarily placed. The interval between the upper main reinforcement F1 of the beam is appropriately adjusted and fixed with a tie wire. The open part of the upper reinforcing bar E2 of the stirrup bar is dropped from above the upper main reinforcement F1 of the beam with the lower reinforcing bar E1 facing downward, and fixed with a tie wire. After the beam reinforcement is reinforced, the surrounding concrete formwork is erected and concrete is poured to form the reinforced concrete beam and the pressure-resistant plate. In addition, this construction procedure has been described as for the case where the pressure plate and reinforced concrete beam are formed together, but the fixing fittings of the present invention can also be used when a deep reinforced concrete beam is formed in two parts, one above the other, by dividing it into two parts. [Explanation of symbols]

[0038] 10, 20 Metal fitting body 11, 21 Board 12a, 22a Contact piece 12b, 22b fixed piece 13, 23 volts 14, 24 screw holes 15, 25 Fixed part 16, 26 Placement section 17. Hollow 18 Placement piece 27 Protrusion 28 Through hole A Beam Reinforced Concrete Column A1 Angle Support A2 upper support B,B' flange C. Kanzashi muscle D. Preparation muscle E1 Stirrup bottom rebar E2 Stirrup upper bar F1 Main reinforcement on beam F2 Beam bottom main reinforcement G Pressure-resistant plate G1 Pressure-resistant steel plate

Claims

1. In a beam assembling method, in which kanzashi bars are attached horizontally to angle supports of beam reinforcing bar assembly supports that are erected at intervals in the longitudinal direction of a beam in order to temporarily place main reinforcements on a long beam, preparation bars are attached to both sides of the kanzashi bars and installed along both sides of the beam, and lower reinforcements of stirrup reinforcements that are held in an upright position with their open parts facing upwards are installed at a distance along the preparation bars, the fixing hardware for attaching and fixing the kanzashi bars to the angle supports comprises: a fixing part that clamps the front and back of the edge of one of the two flange parts that form the angle support by tightening bolts; and a placement part on which the kanzashi bars are placed.

2. The bar fastening fixture for a beam reinforcing bar assembly support as described in claim 1, wherein the mounting portion is provided at both ends in a direction perpendicular to the tightening direction of the fixing portion to the flange portion.

3. 3. A metal fitting for fastening a bar to a beam reinforcing bar assembly support as claimed in claim 1 or 2, wherein the mounting portion is provided with a fall prevention portion for preventing the bar from falling off.

4. The metal fitting for fastening a bar to a beam reinforcing bar assembly support as claimed in claim 3, wherein the fall-off prevention portion is a protrusion extending from the placement portion.

5. The metal fitting for fastening a bar to a beam reinforcing bar assembly support as claimed in claim 3, wherein the anti-fall-out portion is a concave recess provided in the placement portion.

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