JP2008081993A - Reinforcing fitting for reinforced holed concrete beam - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcing fitting for a reinforced holed concrete beam, which has a structure for obtaining the strength equal to that of a conventional fitting irrespective of its smaller outside diameter than that of the conventional fitting to satisfy the demand requiring the reinforcing fitting for the reinforced holed concrete beam and having smaller outside diameter than the conventional fitting to construct low reinforced concrete beam having hole in the arrangement of reinforcing bars for a high-rise condominium, and which is easily assembled at site of arrangement of reinforcing bars because such reinforcing fitting is required at site. <P>SOLUTION: The reinforcing fitting 1 is composed of a plurality of annular bodies 2, 3 positioned in the front and the rear and a connection means 4 for connecting these annular bodies 2 and 3 mutually. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

   The present invention relates to a reinforcing metal fitting used to reinforce a hole portion of a reinforced concrete perforated beam.

  Reinforced concrete beams are reinforced with reinforcing bars that are generally called stirrups, but in perforated beams with through-holes in the beam, reinforcing metal fittings are provided to reinforce around the sleeve that forms the hole, The concrete is prevented from shear cracks in the hole.

  An example of a reinforced concrete perforated beam using a reinforcing metal fitting is shown in FIGS.

  That is, the conventional reinforcing metal fitting A is made of reinforced concrete steel bar or the like, and has a plurality of inner and outer annular bodies a and a sleeve receiver b for supporting a hole forming sleeve B.

As shown in FIG. 12, the reinforcing metal fitting A is attached to the stirrup d of the beam and installed in the concrete form C, and concrete is placed thereon to obtain a strong reinforced concrete perforated beam. A reinforced concrete perforated beam reinforcing metal fitting is known (for example, see Patent Document 1).
Japanese Patent No. 3556506

  A conventional reinforcing metal fitting for a reinforced concrete perforated beam, as described in Patent Document 1, has a planar multiple structure of a circular or polygonal frame. This was intended to increase the strength of the reinforcing metal fittings and to facilitate the connection with the stirrups formed like a collar in the beam. It is.

  However, in recent high-rise condominiums, etc., designs have been made to reduce the overall height of the building by reducing the height of the beam, and it is therefore necessary to reduce the outer diameter of the reinforcing bracket used for the perforated beam. It came out.

  In addition, the conventional reinforcing bracket is a planar multi-layer structure of a circular or polygonal frame, so it is heavy and difficult to assemble by one worker at the bar arrangement site, requiring heavy equipment. There is a problem that it cannot be assembled unless it is done by several workers.

  In order to solve the above-mentioned problems, the present invention replaces the conventional reinforcing steel reinforcing metal beam with a large diameter and obtains the required strength with the smallest possible diameter and can be easily assembled on the bar arrangement site. An object of the present invention is to provide a structure having such a structure.

  In order to achieve the above-mentioned object, the present invention forms a reinforcing metal fitting for a reinforced concrete perforated beam comprising a plurality of annular bodies positioned in the front-rear direction and connecting means for connecting these annular bodies in the front-rear direction.

  According to the present invention, in a reinforced concrete perforated beam that is required to reduce the height of the beam, a necessary and sufficient strength can be provided with a small outer diameter, and assembly operation work and transportation work can be performed at a bar arrangement site. This has the effect of providing an easy reinforcing bracket.

  Examples of the best mode for carrying out the present invention are shown below.

  FIG. 1 is a perspective view of Embodiment 1 of a reinforcing metal fitting for a reinforced concrete perforated beam.

  The reinforcing metal fitting 1 is composed of a parallel combination of a rear first annular body 2 and a front second annular body 3, both of which are formed by welding materials such as steel bars for reinforced concrete. It is detachably connected via connecting means 4 protruding from the body 2. In addition, d1 is a longitudinal streak of a stirrup which will be described later, and B is a sleeve which will be described later.

  A front view, a side view, and a top view of the first annular body 2 are shown in FIGS. 2, 3, and 4, respectively.

  2a is a frame, and the frame 2a is formed into an octagonal annular shape by bending steel bars and welding both ends thereof, and the frame 2a has a hole forming sleeve B described later. It is formed in a size sufficient for inserting the body 2a.

  The connecting means 4 projecting from the first annular body 2 toward a second annular body 3 described later includes a first connecting rod 4b welded to the upper side of the frame 2a, and a lower side of the frame 2a. The second connecting rods 4d and 4e welded to each other, and the engaging portion at the tip of the first connecting rod 4b is substantially J that can be engaged with and disengaged from the frame 3a of the second annular body 3 to be described later. A character-like locking tool 4c is screwed so as to be able to advance and retreat, and each of the front end locking portions of the two connecting rods 4d and 4e has a substantially U-shape that intervenes and locks to the frame 3a. The receiver 4f or 4g is fixed by welding.

  As shown in FIG. 4, the connecting rods 4b, 4d and 4e are not inclined at right angles to the frame body 2a, but are inclined slightly to the left or right, which makes the first annular body 2 multistage. This is a consideration for preventing the connecting rods of the adjacent first annular bodies 2 from interfering with each other when the reinforcing metal fitting is formed in combination.

  A front view and a side view of the second annular body 3 are shown in FIGS. 5 and 6, respectively.

  The frame 3a of the second annular body 3 is formed in an octagon similar to the frame 2a, and a contact tool 3b that contacts the upper surface of the sleeve is formed on the upper side of the frame 3a. Inwardly projecting so as to be able to advance and retract, sleeve receivers 3c and 3d for supporting the sleeve are provided on the left and right sides of the lower side of the frame 3a toward the inside of the frame 3a. Each protrusion is fixed.

  Reference numeral 3g denotes a set screw for fixing the contact tool 3b. The abutment tool 3b and the sleeve receivers 3c and 3d are formed in a bar shape by cutting a steel bar.

  Further, 3e and 3f are clamping metal fittings to the vertical streak d1 of the streaks, which will be described later, and are formed in a convex shape by bending a steel bar. These clamping metal fittings 3e and 3f have their convex projections attached to the frame. It protrudes ahead of the body 3a and is fixed by welding to vertical sides on both sides of the frame 3a.

  Next, the usage method of the reinforcement metal fitting 1 of a present Example is demonstrated.

  FIG. 7 is a perspective view showing a state in which the reinforcing metal fitting 1 is used. In the reinforcing work of the reinforced concrete perforated beam, the reinforcing metal fittings 1 are respectively fixedly attached to the ribs on both sides of the hole so as to be reinforced. The sleeve B is inserted into the metal fitting 1.

  That is, the sleeve B is supported by the sleeve receivers 3c and 3d provided on the second annular body 3 forming the reinforcing metal 1, and the abutment tool 3b provided on the second annular body 3 is advanced and retracted. The sleeve is brought into contact with the upper part of B and fixed with a set screw 3 g so that the sleeve can be kept stationary even when the concrete is placed.

  In addition, the reinforcing metal fitting 1 engages and fixes the front second annular body 3 to the stirrup, and connects the first annular body 2 to the rear thereof. The method of attaching the second annular body 3 to the stirrup is to connect the two vertical streaks d1 and d1 of the stirrup with the clamps 3e and 3f protruding forward on the left and right sides of the second annular body 3. Clamp and fix.

  When the reinforcing metal fitting 1 is attached to the stirrup, it may be attached in a state where the front annular body 3 and the rear first annular body 2 are connected, or the second annular body 3 may be attached first. The first annular body 2 may be connected to the rear of the second annular body 3 and assembled.

  In addition, if necessary in terms of strength, a plurality of first annular bodies 2 may be connected to the rear of the second annular body 3 to form a reinforcing metal fitting made of three or more stages of annular bodies.

  When the first annular body 2 is connected to the second annular body 3, U-shaped receivers at the front end locking portions of the two second connection rods 4 d, 4 e of the first annular body 2. 4g, 4f are locked to the frame of the second annular body 3, and then the J-shaped locking tool 4c of the first annular body 2 is engaged with the frame of the second annular body 3, By adjusting the screw at the root of the locking member 4c, the first annular body 2 and the second annular body 3 are tightened and assembled so as to be tightly connected.

  In the present embodiment, the second annular body 3 is welded with the clamps 3e and 3f on the vertical sides on both sides of the frame 3a. However, the clamps 3e and 3f are as shown in FIG. Alternatively, a second annular body 3 ′ may be installed inside the vertical sides on both sides of the frame 3 a in parallel with these sides.

  In this case, the upper and lower end portions of the clamp fittings 3e and 3f are welded and fixed to the frame body 3a, and the protruding portions of the clamp fittings 3e and 3f are projected forward of the frame body 3a.

  Also in this case, the two vertical streaks d1 and d1 of the stirrup are clamped and fixed by the projecting portions.

  In this embodiment, the connecting rods 4b, 4d, and 4e of the connecting means 4 are welded to the frame 2a of the first annular body 2, and the tip locking portions are intervened on the frame 3a of the second annular body 3. Although an example of stopping is shown, conversely to this example, the connecting rods 4b, 4d, and 4e are welded or engaged with the frame 3a of the second annular body 3, and these leading end locking portions are connected to the first annular body 2. You may make it latch to the frame 2a.

  FIG. 9 is a perspective view of Example 2 of the reinforcing metal fitting for a reinforced concrete perforated beam.

  The reinforcing metal fitting 11 includes a rear first annular body 2, a front second annular body 3, and an outer annular body 5 provided concentrically with the second annular body 3 on the outer side of the second annular body 3.

  The outer annular body 5 has a frame body 5a formed by bending a steel bar into an octagonal shape. A perspective view of the outer annular body 5 is shown in FIG.

  The frame body 5a is formed to have a larger diameter than the frame body 3a of the second annular body 3, and has a plurality of support members 6 projecting inwardly for locking the frame body 3a inside. The outer annular body 5 and the second annular body 3 are concentrically connected via these supports 6 and are assembled in a separable manner.

  That is, the support 6 has a substantially J-shaped first support 6a projecting from the upper part of the frame 5a so as to be able to advance and retreat inward, and the inner sides of the left and right lower sides of the frame 5a. It consists of the substantially J-shaped 2nd support bodies 6b and 6c which protruded toward the direction.

  When the outer annular body 5 is connected to the second annular body 3, the two second supports 6 b and 6 c included in the outer annular body 5 are engaged with the frame body 3 a of the second annular body 3. Then, the hook portion of the first support body 6a is engaged with the upper portion of the frame body 3a, and the screw of the root portion of the first support body 6a is adjusted so that the outer annular body 5 and the first The two annular bodies 3 are tightened with nuts 6d so as to be tightly connected.

  The method of using the reinforcing metal fitting 11 of the second embodiment is used by engaging with the streaks as in the first embodiment.

  The reinforcing metal fitting 11 of the second embodiment is used when the strength is required to be stronger than that of the perforated beam of the first embodiment and the height of the beam is allowed to increase.

  The reinforced concrete perforated beam reinforcing metal fitting of the present invention is used in a high-rise building such as a condominium where particularly a low beam height is required.

It is a perspective view of the reinforcement metal fitting of a reinforced concrete perforated beam of Example 1. It is a front view of a part of said reinforcement metal fitting and a 1st annular body. It is a side view of the first annular body. It is a top view of the first annular body. It is a front view of a part of said reinforcement metal fitting and a 2nd annular body. It is a side view of the said 2nd annular body. It is a perspective view which shows the use condition of the reinforcement metal fitting of the reinforced concrete perforated beam of Example 1. FIG. FIG. 5 is a front view of another example of the part of the reinforcing metal fitting and the second annular body shown in FIG. 5. It is a perspective view of the reinforcement metal fitting of a reinforced concrete perforated beam of Example 2. It is a perspective view of a part of reinforcement metal fitting of a reinforced concrete perforated beam of Example 2 same as the above, an outer annular body. It is an example of the reinforcement metal fitting of the conventional reinforced concrete perforated beam. It is explanatory drawing which shows the use condition of the conventional reinforced concrete perforated beam.

Explanation of symbols

1,11 Reinforced metal fittings for reinforced concrete perforated beams
2, 3, 3 ', 5 ring body 3b contact tool 3c, 3d sleeve holder 3e, 3f rib clamp metal fitting 4 connecting means 4b, 4d, 4e connecting rod 4c locking tool 4f, 4g receiver 6 support Tool 6a 1st support body 6b, 6c 2nd support body

Claims (7)

  A reinforcing bracket for a reinforced concrete perforated beam comprising a plurality of annular bodies positioned in the front-rear direction and connecting means for connecting the annular bodies in the front-rear direction.   The connecting means comprises a connecting rod that protrudes from one annular body of the annular body located in the front-rear direction toward the other annular body, and has a locking portion that engages with the other annular body at a distal end portion. Item 2. A reinforcing metal fitting for a reinforced concrete perforated beam according to item 1.   The connecting rod comprises a plurality of connecting rods, and the locking portion of one of the connecting rods is formed of a substantially U-shaped receiver for interveningly locking the other annular body and the remaining connecting rods. The reinforcing member for a reinforced concrete perforated beam according to claim 2, wherein the locking portion comprises a locking tool that can be engaged with and disengaged from the other annular body.   The front annular body has a sleeve receiving member that supports the sleeve in its lower half and protrudes inward, and an abutting tool that can be advanced and retracted to contact the sleeve from its upper surface in the upper half. The reinforcing metal fitting for a reinforced concrete perforated beam according to any one of claims 1 to 3, wherein the reinforcing metal fitting is projecting inwardly.   The said front annular body is equipped with the outer annular body which protruded inwardly the several support tool latched to this annular body by an inner end, The any one of Claim 1 thru | or 4 characterized by the above-mentioned. Reinforced bracket for reinforced concrete perforated beams.   One of the plurality of support members is composed of a substantially J-shaped first support member projecting on the outer annular body so as to be able to advance and retract, and the remaining support members are fixed to the outer annular body. The reinforcing metal fitting for a reinforced concrete perforated beam according to claim 5, comprising a substantially J-shaped second support projectingly provided.   5. The reinforcing bracket for a reinforced concrete perforated beam according to any one of claims 1 to 4, wherein the front annular body is formed in an octagonal shape and provided with pinch metal fittings on both sides thereof.

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