JP2010242482A - Reinforcing fitting for reinforced-concrete perforated beam - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcing fitting which is used for arranging reinforced concrete perforated beams, is easily manufactured and mounted, causes no construction failure, can be miniaturized, and can obtain sufficient reinforcing strength. <P>SOLUTION: The reinforcing fitting comprises: a frame-shaped body 2 formed in a quadrilateral by bending a steel bar for reinforced concrete with corners 2a, 2b, 2c, 2d on the upper, lower, right and left sides, while making knot-shaped expanding portions 2e, 2e at the terminals of both ends of the steel bar and intersecting the both ends with each other at the corner 2c; upper and lower locking means 3 having two mounting rods 3a, 3b which include locking portions 3ab to stirrups A on both ends and are fixed parallel to each other at the inner side of the upper and lower corners 2a, 2b of the frame-shaped body 2; and a support means 4 having three support rods 4a, 4b, 4c of a sleeve B, a support body 4ab for locking the support rod 4a so as to freely advance/retreat toward the center of the frame-shaped body 2, or the like. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

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

  Reinforced concrete beams are generally reinforced with reinforcing bars called stirrups, but in perforated beams with through-holes in the beam, reinforcing metal fittings are provided to reinforce around the hole. It is designed to prevent shear cracks in the concrete around.

  A conventional example of such a reinforced concrete perforated beam reinforcing bracket is shown in FIGS.

  That is, the reinforcing metal fitting A has a plurality of annular bodies a formed by one common rod body, the annular bodies a intersect at the inner and outer transition portions, and the rod bodies corresponding to the outermost annular body a. Both end portions c of the inner ring body are bent inward and welded to the inner ring body a next to the outermost ring body a, and the connecting rods b and b are connected and fixed to both sides of the lower part of the inner and outer ring bodies a. Examples are known (for example, see Patent Document 1).

  A cylindrical sleeve B for binding the annular body a to the rib streak d of the beam with a wire to fix the reinforcing metal fitting A and forming a hole in the beam is inserted into the annular body a and the connecting rod. It is supported at the tip of b and b. E indicates a formwork.

Japanese Patent No. 3556506

  According to this conventional reinforcing metal fitting A, a single rod-shaped body intersects at the transition portion to form a plurality of inner and outer annular bodies a, and both ends of the rod-shaped body at locations corresponding to the outermost annular body a. Since the portion c is bent inward and welded to the next inner ring body a, it takes time and labor to manufacture, and the construction is difficult to perform, and the ring body a and the stirrup d If the wire is not sufficiently bound with the wire, there is a problem that the frame body is attached obliquely, resulting in poor construction.

  The present invention eliminates these problems, facilitates production, and can be accurately attached to stirrups without causing poor construction, enabling downsizing and obtaining sufficient reinforcement strength. An object of the present invention is to provide a reinforced concrete perforated beam reinforcing bracket.

  In order to achieve the above object, the present invention provides a frame-like body formed by bending a rod body into a frame shape so that a sleeve can be inserted into the frame shape, and fixed to the frame-like body and arranged on the left and right sides of the sleeve. And a supporting means for supporting the sleeve from the outer periphery thereof.

  As an effect of the present invention, it becomes easy to manufacture and becomes light and easy to handle in construction, and it can be accurately attached to a stirrup and there is no construction failure, and the frame can be downsized. In addition, it is possible to provide a reinforced concrete perforated beam reinforcing bracket capable of obtaining sufficient reinforcing strength.

It is a front view of the reinforcement metal fitting of Example 1 of this invention. It is a side view of a reinforcement metal fitting same as the above. It is a perspective view of the front side which shows the 1st step of the fixing method of an upper side support rod in the location of the upper support means of a reinforcement metal fitting same as the above. It is a perspective view of the front side which shows the 2nd step of the fixing method. It is a perspective view of the back side which shows the 2nd step. It is a perspective view of the front side which shows the last step of the fixing method. It is a perspective view of the back side which shows the last step. It is a front view of the reinforcement metal fitting of Example 2 of this invention. It is a front view of the reinforcement metal fitting of Example 3 of this invention. It is a front view of the reinforcement metal fitting of Example 4 of this invention. It is a front view of the reinforcement metal fitting of Example 5 of this invention. It is a front view of the reinforcement metal fitting of Example 6 of this invention. It is a side view of a reinforcement metal fitting same as the above. It is a perspective view of the location of the upper support means of the same reinforcing metal fitting. It is a front view of the reinforcement metal fitting of Example 7 of this invention. It is a front view of the reinforcement metal fitting of Example 8 of this invention. It is a front view of the reinforcement metal fitting of Example 9 of this invention. It is a front view of the reinforcement metal fitting of Example 10 of this invention. It is a side view of a reinforcement metal fitting same as the above. It is a front view of the reinforcement metal fitting of Example 11 of this invention. It is a front view of the reinforcement metal fitting of Example 12 of this invention. It is a front view of the reinforcement metal fitting of Example 13 of this invention. It is a front view of the reinforcement metal fitting of Example 14 of this invention. It is a front view of the reinforcement metal fitting of Example 15 of this invention. It is a front view of the use condition of the conventional reinforcement metal fitting. It is a side view of the use condition of the conventional reinforcement metal fitting same as the above.

  The example of the form for carrying out the present invention is shown next.

  A first embodiment of the reinforcing metal fitting for a reinforced concrete perforated beam according to the present invention will be described with reference to FIGS.

  FIG. 1 is a front view of a reinforcing metal fitting 1 of this embodiment, and FIG. 2 is a side view thereof. Here, A is a stirrup of the beam, B is a sleeve for forming a hole, and C is a binding portion where the reinforcing metal fitting and the stirrup A are bound by a wire.

  The reinforcing metal fitting 1 is mainly composed of steel bars for reinforced concrete, and a frame-like body 2 formed by bending a single steel bar into a single quadrilateral having corners 2a, 2b, 2c, 2d in the vertical and horizontal directions, Weld to the inside of each corner 2a, 2b above and below the frame-like body 2, that is, the left and right sides of the upper portion of the frame-like body 2 and the left and right sides of the lower portion of the frame-like body 2. It consists of upper and lower locking means 3 consisting of mounting rods 3a and 3b fixed in parallel in the vertical direction and support means 4 consisting of three support rods 4a, 4b and 4c for supporting the sleeve B.

  The frame-like body 2 is formed with bulging portions 2e and 2e bulging in both ends of the steel bar forming the frame-like body 2 in the shape of a larger diameter than the diameter of the steel bar. The continuous ends cross each other at the corner 2c on the side of the frame-like body 2, and the bulging portions 2e and 2e are formed so as to protrude slightly outside the corner 2c.

  The frame-like body 2 is fixed by welding the both end portions to each other at the intersection 2c of the corner portion.

  The attachment rods 3a and 3b have locking portions 3ab formed by bending right and left ends of a rod-shaped body made of steel bars for reinforced concrete at right angles in the same direction. Locking means 3 is formed.

  Further, a cylindrical cap 3d made of a flexible material such as plastic is put on each tip of the locking portion 3ab.

  The diameter of the steel bar of the frame-like body 2 can be identified by the color coding of the caps 3d at both ends of the upper mounting rod 3a, and the frame-like body 2 by the color coding of the caps 3d at both ends of the lower mounting rod 3b. The size of was identified. Thereby, construction, management, inspection and the like at the work site can be easily performed.

  The support means 4 comprises an upper support rod 4a and lower left and right support rods 4b and 4c, and the lower left and right support rods 4b and 4c comprise a rod-like body, It is fixed to the edge of the root with a root.

  Further, the upper support rod 4a is composed of a rod-like body in which the horizontal rod 4aa is orthogonally fixed to the upper end portion, and is composed of left and right rod bodies extending vertically with a space in the center portion of the upper attachment rod 3a. The support body 4ab is fixed, and the upper support rod 4a is slidably contacted between the support bodies 4ab so as to be movable up and down.

  Reference numeral 4e denotes a cap that covers the top ends of the upper support rod 4a and the lower support rods 4b and 4c, and is made of a flexible material such as plastic.

  The diameter of the sleeve B supported by the color coding of the cap 4e can be identified, and construction, management, inspection, etc. at the work site can be easily performed.

  Reference numeral 4f denotes a wire, and the wire 4f is used to tie the upper support rod 4a to the upper mounting rod 3a as shown in FIGS.

  Here, for the underground beam having a concrete cover thickness of 50 mm, for example, the reinforcing metal fitting 1 bound with a red wire 4 f is used, or for a general beam having a concrete cover thickness of 40 mm, blue. As the use of the reinforcing metal fitting 1 to which the wire 4f is attached, the worker distinguishes the reinforcing metal fitting 1 for the underground beam or the reinforcing metal fitting 1 for the general beam according to the color of the wire 4f so that the construction efficiency is improved. I tried to figure it out.

  The support body 4ab composed of left and right rods is welded and fixed to the mounting rod 3a at each lower portion, and each lower end portion is bent into a key shape so that the bent portion 4ab1 protrudes rearward of the mounting rod 3a. I am letting.

  Next, the usage method and the effect of the reinforcing metal fitting 1 of the reinforced concrete perforated beam of the present embodiment will be described.

  The reinforcing metal fitting 1 is connected to the stirrup A on both sides of the through-hole installation location in the concrete mold by engaging the engaging portions 3ab on both ends of the mounting rods 3a and 3b. After the positioning set is accurately performed, the frame-like body 2 is bound to the stirrup A with a wire and the reinforcing metal fitting 1 is fixed. This binding portion is indicated by C.

  Next, a sleeve B for forming a hole in the center of the frame-like body 2 is inserted.

  At this time, the upper support rod 4a is removed from the frame-like body 2, and the sleeve B is placed on the tip portions of the lower support rods 4b and 4c.

  Thereafter, the support rod 4a is inserted between the supports 4ab so that the lower end portion of the upper support rod 4a contacts the upper surface of the sleeve B.

  At this time, the horizontal bar 4aa at the upper end of the support bar 4a moves up and down using the left and right bar-shaped bodies of the support body 4ab as guides, so that the support bar 4a does not fall off between the support bodies 4ab.

  Next, a method of attaching the support rod 4a to the attachment rod 3a using the wire 4f will be described with reference to FIGS.

  As shown in FIG. 3, the wire 4f is formed in a loop shape, and both ends thereof are wound around the intermediate portion of the support rod 4a. As a first step, the intermediate bent portion 4fa goes from the lower side of the mounting rod 3a to the rear. Pull up. The lower end portion of the upper support rod 4a presses the upper surface of the sleeve B by pulling up the intermediate bent portion 4fa of the wire 4f.

  Next, as shown in FIGS. 4 and 5, as a second step, the portion pulled up above the wire 4f is wound around the top of the support rod 4a and both ends of the horizontal rod 4aa, and then the intermediate bent portion 4fa is pulled down. . In this way, the lower end portion of the support rod 4a can be held firmly against the upper surface of the sleeve B.

  Next, as shown in FIGS. 6 and 7, as a final step, the intermediate bent portion 4fa of the wire 4f pulled down is hung and locked by bending the bent portion 4ab1 at the lower end of the support 4ab.

  Thus, the sleeve B is reliably supported by the support rods 4a, 4b, and 4c, and the wire 4f can be easily wound around the horizontal rod 4aa and the like even in a narrow space between the assembled bar arrangements.

  Example 2 of the reinforcing metal fitting for a reinforced concrete perforated beam according to the present invention will be described with reference to FIG.

  FIG. 8 is a front view of the reinforcing metal fitting 11 of this embodiment.

  In the reinforcing metal fitting 11 of this embodiment, the frame-like body 2A is formed into a double-sided quadrilateral by bending a single steel bar.

  The steel bar forming the frame-like body 2A has swell-like bulged parts 2e and 2e each having a diameter larger than the diameter of the steel bar at both ends thereof, and these both end parts are in the shape of the frame. The bulging portions 2e and 2e intersect each other at the corner portion 2Ac on the side of the body 2A so that the bulging portions 2e and 2e protrude slightly outward from the corner portion 2Ac. Are fixed to each other by welding.

  Two rod-like mounting rods 3a and 3b are fixed to the inner and outer double frame-like body 2A in parallel with each other inside the upper and lower corners 2Aa and 2Ab of the frame-like body 2A. .

  The support means 4 for supporting the sleeve B is formed in the same manner as in the first embodiment, and is provided at the left and right sides of the lower part of the inner frame-like body 2A and at the center of the mounting rod 3a located on the upper side. .

  In this embodiment, the frame-like body 2A is made of a double-sided quadrilateral, but this is suitable when the reinforcing metal fitting 1 of the first embodiment is insufficient in the amount of reinforcing bars.

  Example 3 of the reinforcing metal fitting for a reinforced concrete perforated beam according to the present invention will be described with reference to FIG.

  FIG. 9 is a front view of the reinforcing metal fitting 21 of this embodiment.

  In the reinforcing metal fitting 21 of the present embodiment, the frame body 2B is formed into an inner and outer triple quadrilateral by bending a single steel bar, and is expanded at both ends of the frame body 2B in the same manner as in the second embodiment. The protrusions 2e and 2e are provided, and the bulging parts 2e and 2e protrude slightly from the intersections of the both ends, and the both ends are fixed to each other at the intersection 2Bc. .

  Inside the upper and lower corners 2Ba, 2Bb of the frame-like body 2B, two rod-like mounting rods 3a, 3b are parallel to each other, and the inner double frame of the inner-outer triple frame-like body 2B. It is fixed by welding to the body 2B.

  The support means 4 for supporting the sleeve B is provided at the left and right sides of the lower part of the inner frame-like body 2B and at the center of the upper mounting rod 3a as in the second embodiment.

  In the present embodiment, the reinforcing metal fitting 11 of the second embodiment is suitable for further reinforcement when the reinforcing bar amount is insufficient.

  Example 4 of the reinforcing metal fitting for a reinforced concrete perforated beam according to the present invention will be described with reference to FIG.

  FIG. 10 is a front view of the reinforcing metal fitting 31 of this embodiment.

  The reinforcing metal fitting 31 of the present embodiment is composed of an inner / outer triple quadrilateral frame 2B as in the third embodiment, and the support means 4 is provided in the same manner as in the third embodiment. The attachment rods 3a and 3b are formed long and welded and fixed over the entire triple frame 2B.

  This embodiment is particularly suitable for supporting the large-diameter sleeve B when the reinforcement amount is insufficient.

  Embodiment 5 of a reinforcing metal fitting for a reinforced concrete perforated beam according to the present invention will be described with reference to FIG.

  FIG. 11 is a front view of the reinforcing bracket 41 of the present embodiment. In the reinforcing bracket 41 of the present embodiment, one steel bar is bent to form a circular frame-like body 2D, and the end of the steel rod In the same manner as in Example 1 above, the bulging portions 2e and 2e were formed at both ends, and both ends were fixed to each other at the intersection 2Dc described above.

  Then, the upper hook 3a of the upper locking means 3 is welded and fixed to the upper part of the frame 2D, and the lower hook 3b of the lower locking means 3 is welded and fixed to the lower part of the frame 2A. .

  The left and right support rods 4b, 4c on the lower side of the support means 4 are welded and fixed to the left and right curved sides of the lower portion of the frame-like body 2D in the same manner as in the first embodiment. The upper support rod 4a is provided at the intermediate portion of the upper attachment rod 3a so as to be able to advance and retreat as in the first embodiment.

  The reinforcing metal fitting 41 of this embodiment is suitable for preventing a concentric curved crack on the outer side of the sleeve B in a reinforced concrete beam.

  In addition, although the reinforcing metal fittings 1, 11, 21, and 31 of the first to fourth embodiments are examples in which the frame-like bodies 2, 2A, and 2B are quadrangular, these are polygons such as hexagons and octagons. You may form in.

  In the reinforcing metal fittings 1, 11, 21, 31, and 41 of the first to fifth embodiments, the upper support means 4 is provided at the center of the upper mounting rod 3a. You may provide directly in the top part of the shape 2, 2A, 2B or 2D.

  Furthermore, in the first to fifth embodiments, the support rods 4a, 4b, and 4c of the support means 4 are formed of a rod-like body. However, this is optional, such as a belt-like plate, and the upper support rod 4a can be advanced and retracted. In addition, it is necessary to have a horizontal ridge projecting sideways.

  A sixth embodiment of the reinforcing metal fitting for a reinforced concrete perforated beam according to the present invention will be described with reference to FIGS.

  FIG. 12 is a front view of the reinforcing metal fitting 51 of the present embodiment, FIG. 13 is a side view thereof, and FIG. 14 is a perspective view of a portion of the upper support means.

  The reinforcing metal fitting 51 has the same structure as that of the reinforcing metal fitting 1 except that the supporting means 5 of another form is used instead of the supporting means 4 in the reinforcing metal fitting 1 of the first embodiment.

  That is, the support means 5 comprises an upper support rod 5a and lower left and right support rods 5b, 5c. These support rods 5a, 5b, 5c are formed by bending fine steel bars into a U-shape. The lower left and right support rods 5b and 5c are welded and fixed to the left and right sides of the lower portion of the frame-like body 2 at the U-shaped legs and the U-shaped intermediate side 5d is It is formed so as to face the center of the frame-like body 2.

  Further, the first support members 5a1, 5a2 of the upper support bar 5a have the same shape as shown in FIG. 14, and are formed by bending a belt-shaped iron plate into a U-shape, and are formed above and below these first support members 5a1, 5a2. A horizontal plate portion has insertion holes through which the U-shaped vertical sides (leg portions) of the upper support rod 5a can be advanced and retracted, and the first support members 5a1, 5a2 are arranged side by side to form the upper attachment rod. 3a is fixed by welding at an interval.

  The U-shaped intermediate side portion 5d of the upper support rod 5a is located on the lower side toward the center of the frame-like body 2, and the upper end portion of the vertical portion on both sides of the upper support rod 5a is The rod-shaped locking rod 5a3 is fixed by welding, and both end portions of the locking rod 5a3 protrude to both sides of the vertical portions on both sides of the support rod 5a to form arm portions 5a6.

  5f indicates a wire, and the wire 5f is bent at an intermediate portion to be formed into an intermediate bent portion 5fa into which a finger can be inserted, and at both ends, is attached to an intermediate portion of the locking rod 5a3, At both ends and an intermediate portion of the intermediate bent portion 5fa, the upper bent portion 3a is hooked and folded to extend the intermediate bent portion 5fa above the arm portion 5a6.

  Next, the usage method and the effect of the reinforcing metal fitting 51 of the reinforced concrete perforated beam of the present embodiment will be described.

  The method of using the support means 5 of the sleeve B in this embodiment is slightly different from that of the support means 4 in the first embodiment.

  That is, when inserting the sleeve B for forming a hole in the center part of the frame-like body 2, the upper support rod 5a is pulled upward so that the sleeve B can be easily inserted.

  Next, the sleeve B is placed on the tip of the lower support rods 5b and 5c.

  Thereafter, the upper support bar 5a is pushed down by hand until the lower intermediate side 5d of the upper support bar 5a hits the upper surface of the sleeve B.

  Next, a finger is inserted into the intermediate bent portion 5fa of the wire 5f, and the wire 5f is pulled upward as indicated by an arrow Z in FIG. 14, so that the intermediate side portion 5d of the upper support rod 5a is strongly against the upper surface of the sleeve B. After the contact, the vicinity of the intermediate bent portion 5fa of the wire 5f is wound around the arm portion 5a6 of the locking rod 5a3 and fixed as indicated by the imaginary line in FIG.

  Although the support rods 5a, 5b and 5c of the present embodiment do not have the flexible cap 4e like the support rods 4a, 4b and 4c of the first embodiment, the hands and fingers of the operator are damaged. Since there is a flat intermediate side 5d that does not have any, the bar arrangement work can be performed safely.

  Example 7 of the reinforcing metal fitting for a reinforced concrete perforated beam according to the present invention will be described with reference to FIG.

  FIG. 15 is a front view of the reinforcing bracket 61 of the present embodiment. In the reinforcing bracket 61 of the present embodiment, the locking rod 3a of the upper locking means 3 is 1 on the upper corner 2a of the frame-like body 2. FIG. The fifth embodiment is the same as the fifth embodiment except that the locking rod 3b of the lower locking means 3 is welded and fixed at one point to the lower corner 2b of the frame-like body 2 at the point. It is the same as the reinforcing metal fitting 1.

  In the reinforcing metal fitting 61 of this embodiment, the locking rods 3a and 3b are fixed to the upper and lower corners 2a and 2b of the frame-like body 2 by one-point welding, respectively. It is suitable for.

  An eighth embodiment of the reinforcing metal fitting for a reinforced concrete perforated beam according to the present invention will be described with reference to FIG.

  FIG. 16 is a front view of the reinforcing metal fitting 71 of this embodiment.

  In the reinforcing metal fitting 71 of the present embodiment, the frame body 2A is a double quadrilateral similar to the frame body 2A of the second embodiment.

  Two rod-shaped mounting rods 3a and 3b are fixed to the inner and outer double frame-like body 2A in parallel with each other inside the upper and lower corners 2Aa and 2Ab of the frame-like body 2A. Yes.

    The support means 5 for supporting the sleeve B is formed in the same manner as in the sixth embodiment, and the lower support rods 5b and 5c are provided on the left and right sides of the lower part of the inner frame-like body 2A and the upper support. The collar 5a is provided at the center of the mounting collar 3a located on the upper side.

  In the present embodiment, the frame-like body 2A is made of a double-sided quadrilateral, which is suitable when the reinforcing bar amount is insufficient.

  Embodiment 9 of a reinforcing metal fitting for a reinforced concrete perforated beam according to the present invention will be described with reference to FIG.

  FIG. 17 is a front view of the reinforcing bracket 81 of the present embodiment. In the reinforcing bracket 81 of the present embodiment, the frame-like body 2D has a circular shape similar to the frame-like body 2D of the fifth embodiment.

  Then, the upper attachment means 3a of the upper locking means 3 was fixed to the upper part of the frame-like body 2D, and the lower attachment means 3b of the lower locking means 3 was fixed to the lower part of the frame-like body 2D.

  The support means 5 is formed in the same manner as in the sixth embodiment, and the lower left and right support rods 5b and 5c are fixed to the left and right curved sides of the lower part of the frame-like body 2D, and the upper side The support rod 5a is provided in the middle portion of the upper mounting rod 3a so as to be able to advance and retract in the same manner as in the above embodiment.

  The reinforcing metal member 81 of this embodiment is suitable for preventing a concentric curved crack on the outer side of the sleeve B in a reinforced concrete beam.

  The reinforcing metal fittings 51, 61, and 71 of the sixth to eighth embodiments are examples in which the frame-like bodies 2 and 2A are quadrangular or circular, but are formed in a polygon such as a hexagon or an octagon. Also good.

  Further, in the reinforcing metal fittings 51, 61, 71, 81 of the sixth embodiment to the ninth embodiment, the example in which the upper support means 5 is provided in the central portion of the upper mounting rod 3a is shown. You may provide directly in the top of 2, 2A, 2D.

  A tenth embodiment of the reinforced concrete perforated beam reinforcing metal fitting according to the present invention will be described with reference to FIGS.

  FIG. 18 is a front view of the reinforcing metal fitting 91 of the present embodiment, and FIG. 19 is a side view thereof.

  The difference between the reinforcing bracket 91 of the present embodiment and the reinforcing bracket 1 in the first embodiment is that the structure of the support means 6 of the sleeve B is different.

  In the support means 4 in the first embodiment, only the upper support rod 4a can be moved back and forth in the up-and-down direction, and the lower support rods 4b and 4c are fixed to the frame-like body 2, whereas the support means 6 in the present embodiment. Has a structure in which rod-like support rods 6 a, 6 b, 6 c are locked toward the center of the frame-like body 2 so as to be able to advance and retract from three directions.

  Further, cylindrical caps 6d made of a flexible material such as plastic are put on both ends of the support rods 6a, 6b, 6c, and the end portions of these support rods are placed on the hands of the operator and the sleeve B. Care is taken not to damage the surface.

  And it is three sets of support bodies 7a, 7b, and 7c which latch these support rods 6a, 6b, 6c toward the center part of the said frame-shaped body 2 so that advancement / retraction is possible from three directions.

  That is, these supports 7a, 7b, and 7c are formed by bending a belt-shaped iron plate into a U-shape and providing insertion holes through which the support rods 6a, 6b, or 6c can be loosely fitted in the upper and lower horizontal plate portions. A screw hole is provided in the portion, and a tip portion of a bolt 8 screwed into the screw hole presses and holds the side portions of the support rods 6a, 6b, 6c loosely fitted in the insertion hole. Is formed.

  The supports 7a, 7b and 7c are arranged so that they are equidistant from each other at approximately 120 degrees.

  The reinforcing metal fitting 91 of this embodiment can be applied to the sleeve B having various different diameters.

  The cap 6d has a different color for each thickness of the steel bar for reinforced concrete used and / or for each diameter of the sleeve B to be supported.

  By such color coding of the cap 6d, construction, management, inspection, etc. at the work site can be easily performed.

  An eleventh embodiment of the reinforced concrete perforated beam reinforcing metal fitting of the present invention will be described with reference to FIG.

  FIG. 20 is a front view of the reinforcing metal fitting 101 of this embodiment.

  In this embodiment, instead of the support means 4 of the second embodiment shown in FIG. 8, the support means 6 of the tenth embodiment shown in FIGS. 18 and 19 is provided and can be applied to the sleeve B having various diameters. In addition, the reinforcing metal fitting 91 of the tenth embodiment is suitable when the reinforcing bar amount is insufficient.

  Embodiment 12 of a reinforcing metal fitting for a reinforced concrete perforated beam according to the present invention will be described with reference to FIG.

  FIG. 21 is a front view of the reinforcing metal fitting 111 of this embodiment.

  In the reinforcing metal fitting 111 of this embodiment, the frame-like body is the same as the frame-like body 2D of the fifth embodiment of FIG. 11, and the support means for the sleeve B is replaced with the support means 4 of the fifth embodiment in FIG. The support means 6 of Example 10 of FIG. 19 was fixed.

  In the case of the reinforcing metal fittings 91 and 101 of Example 10 and Example 11, the frame-like bodies 2 and 2A have shown an example of a quadrangle, but may be formed in a polygon such as a hexagon or an octagon, Unlike Example 10, Example 11, and Example 12, you may make it provide the support body 7a of the upper support rod 6a in the top part of the frame-like bodies 2, 2A, and 2D.

  A thirteenth embodiment of the reinforced concrete perforated beam reinforcing bracket of the present invention will be described with reference to FIG.

  FIG. 22 is a front view of the reinforcing metal fitting 121 of this embodiment.

  The reinforcing metal member 121 is the same as the reinforcing metal member 1 of the first embodiment except that the frame member 2E is used instead of the frame member 2 of the first embodiment shown in FIG.

  The frame-like body 2E of the present embodiment has a single structure in which both ends of the steel bars constituting the frame-like body are joined by butt welding as in 2Ea, and the bulging portion 2e is not provided outside the joint 2Ea. The quadrilateral was formed.

  By using butt welding in this manner, the frame-shaped body 2E can be manufactured more easily than the frame-shaped body 2.

  A fourteenth embodiment of reinforced concrete perforated beam reinforcing metal fitting according to the present invention will be described with reference to FIG.

  FIG. 23 is a front view of the reinforcing metal fitting 131 of the present embodiment.

  The reinforcing metal fitting 131 is the same as the reinforcing metal fitting 11 of the second embodiment except that the frame-like body 2F is used instead of the frame-like body 2A of the second embodiment shown in FIG.

  The frame-like body 2F of the present embodiment has a structure in which both ends of the steel bar constituting the frame-like body are joined by butt welding as in 2Fa and the structure does not have a bulging portion 2e outside the joined portion. The quadrilateral was formed.

  The frame-like body 2F of this embodiment is also easier to manufacture than the frame-like body 2A.

  Embodiment 15 of a reinforcing metal fitting for a reinforced concrete perforated beam according to the present invention will be described with reference to FIG.

  FIG. 24 is a front view of the reinforcing metal fitting 141 of the present embodiment.

  The reinforcing metal fitting 141 is the same as the reinforcing metal fitting 41 of the fifth embodiment except that the frame-like body 2G is used instead of the frame-like body 2D of the fifth embodiment shown in FIG.

  The frame-like body 2G of the present embodiment is formed into a circular shape having a structure in which both ends of the steel bars constituting the frame-like body are joined by butt welding like 2Ga, and the bulging portion 2e is not formed on the outer side of the joined portion. Formed.

  By making butt welding in this way, the frame-like body 2G can be manufactured more easily than the frame-like body 2D.

  9, Example 4 in FIG. 10, Example 6 in FIGS. 12 to 14, Example 7 in FIG. 15, Example 8 in FIG. 16, Example 9 in FIG. 17, FIG. 19, Example 11 in FIG. 20, and Example 12 in FIG. 21, each of the reinforcing metal frames of Example 13 in FIG. 22, Example 14 in FIG. 23, and Example in FIG. 24. It is also possible to employ a structure in which both ends of the steel bar are joined together by butt welding, such as a frame-like body of each of the 15 reinforcing metal fittings, and no bulge is formed outside the joint.

  In the first to twelfth embodiments, both ends of the steel bar are fixed by welding at the intersection 2c. However, both ends are fixed by being bound by a wire band or other means. Also good.

  In any of the above-described embodiments, the fixing position of the upper mounting rod 3a to the upper portion of the frame-like body and / or the frame of the lower mounting rod 3b depending on the diameter of the sleeve B to be supported. Various reinforcing metal fittings having different fixing positions to the lower part of the body are prepared.

  The reinforcing metal fitting for a reinforced concrete perforated beam according to the present invention is used for reinforcement when a through hole is provided in the beam.

1, 11, 21, 31, 41, 51, 61, 71, 81,
91, 101, 111, 121, 131, 141 Reinforcing bracket 2, 2A, 2B, 2D, 2E, 2F, 2G Frame 2c Intersection 2e, 2e Swelling portion 3 Locking means 3a, 3b Mounting rod 3ab Locking Part 4, 5 Support means 4a, 5a Upper support rod 4b, 4c, 5b, 5c Lower support rod 4aa Side rod 4f, 5f Wire 4ab, 5a1, 5a2 Support body 5d Bolt A Stirrup B Sleeve

Claims (17)

  A rod-shaped body bent into a frame shape, and a frame-shaped body formed so that a sleeve can be inserted into the frame shape, and a latch fixed to the frame-shaped body and locked to the stirrups arranged on the left and right sides of the sleeve A reinforcing metal fitting for a reinforced concrete perforated beam comprising locking means having a portion and support means provided on the frame-like body for supporting the sleeve from its outer periphery.   2. The reinforced concrete perforated body according to claim 1, wherein the frame-like body is formed by bending a steel bar for reinforced concrete into a polygon having a corner portion and intersecting at both ends of the steel bar to provide a bulging portion at the terminal portion. Reinforcing bracket for beams.   The reinforcing frame for a reinforced concrete perforated beam according to claim 1, wherein the frame-like body is formed by bending a steel bar for reinforced concrete into a circular shape and intersecting at both ends of the steel bar to provide a bulging portion at the terminal portion.   The reinforcing frame for a reinforced concrete perforated beam according to claim 1, wherein the frame-like body is formed by bending a concrete steel bar into a polygon having a corner and welding both ends of the steel bar.   The reinforcing frame for a reinforced concrete perforated beam according to claim 1, wherein the frame-like body is formed by bending a steel bar for reinforced concrete into a circular shape and welded at both ends of the steel bar.   The reinforcing frame for a reinforced concrete perforated beam according to any one of claims 1 to 5, wherein the frame-like body is composed of at least an inner and outer double annular body formed by bending a single steel bar for reinforced concrete.   The said latching means consists of upper and lower mounting rods made of steel bars for reinforced concrete, and the mounting rods include the locking portions bent at the left and right ends so as to be latched to the stirrups. Item 7. A reinforcing metal fitting for a reinforced concrete perforated beam according to any one of items 6 to 9.   The reinforcing bracket for a reinforced concrete perforated beam according to claim 7, wherein an end of the mounting rod is covered with a cap having a color that can be distinguished from the outside.   The support means includes a left and right lower support rod fixed to the left and right sides of the lower portion of the frame-shaped body, and a support fixed to the center portion of the attachment rod of the locking means above or above the frame-shaped body. A reinforcing metal fitting for a reinforced concrete perforated beam according to any one of claims 1 to 7, comprising a body and an upper support rod that is engaged and supported by the support body and advances and retreats toward a center portion of the frame-shaped body. .   The reinforced concrete perforated beam according to claim 9, wherein the support is composed of left and right bar bodies extending vertically with a space therebetween, and the upper support bar is interposed between the left and right bar bodies. Reinforcing metal fittings.   A horizontal bar is fixed to an upper part of the upper support bar, a wire having an end bonded to an intermediate part of the upper support bar is suspended, and the intermediate part of the wire is connected to the upper side part of the frame-shaped body or the The reinforcing bracket for a reinforced concrete perforated beam according to claim 10, wherein the reinforcing member is hooked on an attachment hook of the upper locking means and folded back to wind and lock the tip end portion of the horizontal hook.   The support body is composed of left and right U-shaped plates formed by bending an iron plate into a U-shape, and the rod body is bent into a U-shape in the through holes in the upper and lower horizontal portions of the left and right U-shaped plates. The reinforcing bracket for a reinforced concrete perforated beam according to claim 9, wherein the formed upper support rod is inserted through the both side support rods so as to be able to advance and retreat toward the center of the frame-like body.   The upper end of the upper support rod protrudes laterally from the upper end of the upper support rod, and a wire having a root portion attached to the engagement rod is suspended, and the intermediate portion of the wire is placed on the upper side or upper side of the frame-shaped body. The reinforcing metal fitting for a reinforced concrete perforated beam according to claim 12, wherein the reinforcing member is hooked on a mounting rod of the locking means, folded back and wound around the locking rod.   The reinforcing metal fitting for a reinforced concrete perforated beam according to claim 11 or 13, wherein the wire is a wire of a color that can be distinguished from the outside.   The support means includes a plurality of support rods whose tips are in contact with the outer periphery of the sleeve, and a support member that is provided on the frame-like body and that moves forward and backward toward the center of the frame-like body. The reinforcing metal fitting for a reinforced concrete perforated beam according to any one of claims 1 to 7.   The support body is formed of a U-shaped plate formed by bending an iron plate into a U-shape, and has an insertion hole through which the support rod is inserted in the upper and lower horizontal plate portions of the U-shaped plate. The reinforced concrete perforated beam according to claim 15, wherein a screw hole is provided in the vertical plate portion, and a tip portion of a bolt screwed into the screw hole presses a side portion of the support rod inserted into the insertion hole. Reinforcing metal fittings.   The reinforcing metal fitting for a reinforced concrete perforated beam according to claim 9, claim 10, claim 11, claim 15, or claim 16, wherein an end of the support rod is covered with a cap having a color identifiable from the outside.

Images