JP5325058B2 - Reinforcing bar assembly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcement assembling fitting which assembles a reinforcement cage without welding used for a foundation pile or the like of a cast-in-place concrete. <P>SOLUTION: The reinforcement assembling fitting includes: a ring-like reinforcement holder 2 set inside a plurality of main reinforcements 1 arranged cylindrically at a predetermined interval and cylindrically holding the plurality of main reinforcements 1; a plurality of reinforcement grippers 3 attached to the outside of the main reinforcements 1 for gripping each main reinforcement 1; and a plurality of reinforcement fixing bolts 4, 5 fixing both ends of the reinforcement grippers 3 to the ring-like reinforcement holder 2. The fixing bolt 4 penetrates through the fixing portion 3b of the reinforcement gripper 3, to be screwed with the nut 6 set to the ring-like reinforcement holder 2. The other fixing bolt 5 penetrate through the fixing portions 3c of the ring-like reinforcement holder 2 and the reinforcement gripper 3, from the inside to outside of the ring-like reinforcement holder 2, fastening with the fixing nut 7 to the end. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a reinforcing bar assembly, and can easily assemble a reinforcing bar used for a foundation pile of cast-in-place concrete without welding.

  For example, as shown in FIGS. 7A and 7B, the foundation pile made of cast-in-place concrete has a plurality of main bars 20 arranged in the circumferential direction in a vertical hole, and a hoop bar 21 outside the main bar 20. It is constructed by placing bars and placing concrete 22 and is generally constructed with a large diameter.

  Further, the main bar 20 and the hoop bar 21 are assembled in the shape of a cylindrical basket on the ground in advance, and then hung with a crane or the like and built in the vertical hole. Further, as a hardware for assembling the main bar 20 and the hoop bar 21 into a cylindrical shape, a reinforcing bar holder 23 formed in a circular ring shape from a steel material such as a strip steel in accordance with the diameter of the foundation pile to be formed is used.

  Reinforcing bar holders 23 are installed at at least three locations of the upper and lower ends and the middle part of the rebar cage to be assembled, and main bars 20 are attached to the outer sides thereof at predetermined intervals in the circumferential direction. It can be stopped by welding.

  Further, the reinforcing bar holder 23 not only holds the main bar 20 in a cylindrical cage shape but also has a function of reinforcing a reinforcing bar cage composed of a plurality of main bars 20, and is particularly important as the diameter becomes larger. Yes.

  However, if the main bar 20 is fastened to the reinforcing bar holder 23 by welding, welding heat may adversely affect the main bar 20, so that the assembling of the bar by welding has been limited in recent years.

  In addition, assembling of reinforcing bars by welding is likely to vary depending on the weather and the skill of the operator, and there are problems such as lack of reliability due to poor welding and the like.

  Therefore, recently, the main bar 20 is fastened to the reinforcing bar holder 23 with hardware. For example, in Patent Document 1, a main muscle gripping portion formed in a U shape along the outer periphery of the main bar, and a U shape along the outer periphery of a reinforcing steel material installed inside the main bar so as to cross the main bar. A metal fitting body composed of the formed reinforcing steel material gripping part, and a fastening washer and a fastening nut that are attached to the metal fitting body, and sandwich the main bar and the reinforcing steel material by the metal fitting body, and attached to the fastening washer, There is disclosed a reinforcing bar assembling bracket comprising a hoop muscle gripping part for gripping a hoop muscle installed outside the main bar and intersecting with the main bar.

JP 2007-92435 A Japanese Patent Laid-Open No. 10-37387 Japanese Patent Laid-Open No. 08-105044 JP 2000-257211 A

  However, since the rebar assembly metal fitting disclosed in Patent Document 1 is attached to the inside of the rebar cage to be assembled, when the diameter of the rebar cage is small or the interval between the main bars is considerably narrow, the hand is placed inside the main rebar. There were problems such as difficult installation due to difficulty in entering. In addition, there are problems such as extremely complicated shapes, complicated production, and high production costs.

  The present invention has been made to solve the above problems, and provides a reinforcing bar assembly that can easily assemble a reinforcing bar used for a foundation pile of cast-in-place concrete without welding. Objective.

  The reinforcing bar assembly according to claim 1 is installed inside a plurality of reinforcing bars arranged in a cylindrical shape at a predetermined interval, and a ring-shaped reinforcing bar holder for holding the plurality of reinforcing bars in a cylindrical shape, and an outer side of the reinforcing bars A plurality of reinforcing bar grippers for gripping each reinforcing bar, and a plurality of reinforcing bar fixing bolts for fixing both ends of the reinforcing bar gripping tool to the ring-shaped reinforcing bar holder, respectively. One of the fixing bolts penetrates the end of the reinforcing bar gripping tool and is screwed into a screw hole provided in the ring-shaped reinforcing bar holder, and the other fixing bolt is the ring-shaped reinforcing bar holder and the reinforcing bar. The end of the gripping tool is penetrated from the inside to the outside of the ring-shaped reinforcing bar holder, and a fastening nut is screwed to the end.

  Ring-shaped reinforcing bar holders are shaped like I-shaped steel, H-shaped steel, L-shaped steel or grooved steel, and strip steel (flat steel) in a circular ring shape around an axis parallel to the direction perpendicular to the axis. It can be formed by bending.

  In addition, the reinforcing bar gripping tool can be formed by a method of bending a central portion of a long flat steel or the like into a U shape and opening through holes at both ends thereof. It should be noted that a plurality of central portions may be bent into a U shape (see FIG. 3).

  The reinforcing bar assembly according to claim 2 is the reinforcing bar assembly according to claim 1, wherein the ring-shaped reinforcing bar holder is formed of an H-shaped steel, an angle steel, or a grooved steel. .

  For example, in the case of a shape steel such as an H-section steel, a ring-shaped reinforcing bar holder (for example, FIG. 4 (FIG. 4 (B)) formed by bending a circular ring around an axis parallel to the strong axis (XX) of the cross section of the shape steel. a)) and a ring-shaped reinforcing bar holder (see, for example, FIG. 4B) formed by bending it into a circular ring around an axis parallel to the weak axis (YY) of the section of the section. A kind of ring-shaped reinforcing bar holder can be provided. The former has advantages such as high strength and resistance to deformation, and the latter has advantages such as easy bending and easy manufacture.

  The screw hole of the ring-shaped reinforcing bar holder may be formed directly on the ring-shaped reinforcing bar holder, but can be easily formed by stud welding a nut or the like outside the ring-shaped reinforcing bar holder.

  The reinforcing bar assembly according to claim 3 is characterized in that in the reinforcing bar assembly according to claim 1 or 2, a plurality of recesses for setting the reinforcing bars are provided on the side portion of the ring-shaped reinforcing bar holder. It is.

  The recesses in this case are provided with, for example, irregularities that continue in a wavy shape in the longitudinal direction on the surface of the flange of the steel strip or the section steel as illustrated in FIG. 6A, or illustrated in FIG. 6B. Thus, it can be formed by a method such as cutting a flange of a shaped steel or a part of a flange and a web into a U-groove shape that opens to the side.

  The present invention is installed inside a plurality of reinforcing bars arranged in a cylindrical shape at a predetermined interval, and is attached to the outside of each reinforcing bar, a ring-shaped reinforcing bar holder that holds the plurality of reinforcing bars in a cylindrical shape, Since a plurality of reinforcing bar gripping tools for gripping each reinforcing bar and a plurality of reinforcing bar fixing bolts for fixing both ends of the reinforcing bar gripping tool to the ring-shaped reinforcing bar holding tool respectively, the plurality of reinforcing bars are ring-shaped. It can be fastened to the outside of the shape-retaining bar only by tightening the fastening bolt, without welding.

  Further, of the fastening bolts, one fastening bolt penetrates the end of the reinforcing bar gripper and is screwed into a screw hole provided in the ring-shaped reinforcing bar holder, and the other fastening bolt is the ring-shaped reinforcing bar. The ends of the retainer and the reinforcing bar gripping tool are passed from the inside to the outside of the ring-shaped reinforcing bar retainer, and the retaining nut is screwed to the end. Since it is possible to perform the operation on the outer side of the main bar, the fixing bolt and the fixing nut can be easily tightened even when the installation interval of the main bars is narrow and it is difficult to put the hand inside, and the workability is good.

  Therefore, according to the present invention, it is possible to assemble a rebar cage made up of a plurality of rebars very easily. In particular, if a ring-shaped rebar holder is formed of a shape steel such as an I-shaped steel or an H-shaped steel, Compared to the ring-shaped reinforcing bar holder, the strength is much greater and it is difficult to deform, so it is also suitable for large-diameter reinforcing bars.

The rebar cage assembled in a cylindrical shape is shown, (a) is a cross-sectional view thereof, and (b) is a partial side view thereof. The main bar is shown in a state where the main bar is fixed to the outer side of the ring-shaped reinforcing bar holder by a reinforcing bar gripping tool and a fixing bolt, (a) is an enlarged view of a portion in FIG. 1 (a), and (b) is a side view. . The state where the two main bars are fastened together by the reinforcing bar gripping tool and the fastening bolts on the outer side of the ring-shaped reinforcing bar holder is shown, (a) is an enlarged view of the portion i in FIG. 1 (a), (b). Is a side view. 1 shows a reinforcing bar cage assembled using a ring-shaped reinforcing bar holder made of H-shaped steel, wherein (a) is a ring-shaped reinforcing bar formed by bending an H-shaped steel around an axis parallel to the strong axis of the section of the section. A partial longitudinal cross-sectional view of a rebar cage using a retainer, (b) is a rebar cage using a ring-shaped rebar retainer formed by bending an H-shaped steel around an axis parallel to the weak axis of the section of the section. FIG. The rebar cage assembled using a ring-shaped rebar holder made of section steel is shown, (a) is a partial longitudinal sectional view of a rebar cage using a ring-shaped rebar retainer made of L-shaped steel, and (b) is It is a partial longitudinal cross-sectional view of the reinforcing bar cage using the ring-shaped reinforcing bar holder made of channel steel. The ring-shaped rebar holder made of H-section steel is shown, (a) is a partial perspective view of the ring-shaped rebar holder provided with unevenness for preventing slippage, and (b) is a clip for preventing slippage. It is a partial perspective view of the ring-shaped reinforcing bar holder provided with the notch. (A) is a cross-sectional view of a cast-in-place concrete pile, (b) is the partial longitudinal cross-sectional view.

  1 to 6 show an embodiment of the present invention. In the figure, reference numeral 1 denotes a plurality of main bars arranged in a cylindrical shape in the same axial direction at a predetermined interval in the diameter direction, and reference numeral 2 denotes a circular shape. A ring-shaped reinforcing bar holder that is installed inside a plurality of main bars 1 that are formed in a ring shape and that is arranged in a cylindrical shape, and that holds the plurality of main bars 1 in a cylindrical shape. Reinforcing bar gripping tool that is installed on the outside of the reinforcing bar 1 and grips each reinforcing bar 1 from the outside, and 4 and 5 are for fastening both ends of each reinforcing bar gripping tool 3 to the ring-shaped reinforcing bar holder 2. It is a fastening bolt.

  The ring-shaped reinforcing bar holder 2 is formed into a circular ring shape by bending the steel strip into a circular shape having a predetermined diameter around an axis parallel to the direction perpendicular to the axis of the steel strip, and is formed on one side of each main reinforcing bar 1. A nut 6 is attached, and a through hole 2a is formed on the other side. The nut 6 is attached by stud welding or the like.

  The ring-shaped reinforcing bar holders 2 formed in this way are respectively installed at both end portions and intermediate portions in the axial direction of the plurality of main bars 1 arranged in a cylindrical shape.

  The reinforcing bar gripping tool 3 is formed of a reinforcing bar gripping part 3a formed in a U shape so as to grip the main bar 1 from the lateral direction, and fastening parts 3b and 3c that protrude horizontally at both ends thereof. A through hole 3d is formed in each of the portions 3b and 3c. The reinforcing bar gripping tool 3 is formed by bending an elongated plate or by pressing.

  The reinforcing bar gripping tool 3 formed in this way is attached to the outside of each main bar 1 in a state where the main bar 1 is held by the bar holding part 3a. The fastening bolt 4 is fastened to the nut 6 from the through hole 3d of the fastening portion 3b.

  Further, a fastening bolt 5 is inserted from the inside to the outside of the ring-shaped reinforcing bar holder 2 through the through-hole 2a of the ring-shaped reinforcing bar holder 2 and the through-hole 3d of the fastening part 3c, and a locking nut is attached to the tip part thereof. 7 is tightened. Thus, each main bar 1 is fixed to the outside of the ring-shaped reinforcing bar holder 1.

  Reference numeral 8 denotes a hoop line, which is arranged outside the plurality of main bars 1 arranged in a cylindrical shape at predetermined intervals in the axial direction of the main bar 1. Further, the hoop bar 8 is fixed to the main bar 1 by welding so as not to affect the binding line or the main bar 1. In addition, a dimensional error and a manufacturing error can be absorbed by forming the through-hole 2a and the through-hole 3d in a loose hole.

  FIG. 3 shows a modified example of the reinforcing bar gripping tool 3, in which two reinforcing bar gripping parts 3a are provided in parallel at the center, and fastening parts 3b and 3c are provided at both ends of the reinforcing bar gripping parts 3a and 3a, respectively. A fastening portion 3c is provided between the grip portions 3a and 3a. In addition, through holes 3d are provided in the fastening portions 3b and 3c.

  According to the reinforcing bar gripping tool 3, the two main bars 1 can be simultaneously stopped at one place. When the distance between the two main bars is quite narrow, the center fastening bolt 5 may be omitted.

  4 to 6 show modifications of the ring-shaped reinforcing bar holder, and FIG. 4 (a) shows an H-shaped steel having a circular shape around an axis parallel to the strong axis XX axis of the cross section. The ring-shaped reinforcing bar holder formed by bending is shown.

  FIG. 4B shows a ring-shaped reinforcing bar holder formed by bending an H-shaped steel into a circular shape around an axis parallel to the weak axis Y-Y axis of the cross section. FIG. 5 (a) shows a ring-shaped reinforcing bar holder made of L-shaped steel, and FIG. 5 (b) shows a ring-shaped reinforcing bar holder made of grooved steel.

  6 (a) and 6 (b) show that the surface of the flange of the ring-shaped reinforcing bar holder made of H-shaped steel is provided with irregularities 2b or notches 2c that are continuous in a wavy shape in the axial direction thereof. The main reinforcing bar 1 can be easily attached to a predetermined position of the ring-shaped reinforcing bar holder 2. In FIGS. 6 (a) and 6 (b), the reinforcing bar gripping tool and the fixing bolt are omitted.

  Next, a method for assembling the reinforcing bars will be described. The ring-shaped reinforcing bar holders 2 are arranged at at least three positions, that is, the axial end portions and the intermediate portion of the reinforcing bar cage to be assembled first. Next, the main bar 1 is bridged between the outer portions of the ring-shaped reinforcing bar holders 1 and 1, and both end portions and intermediate portions in the axial direction thereof are fastened to the outer side portions of the respective ring-shaped reinforcing bar holders 2 with the reinforcing bar gripping tool 3. Secured by bolts 4 and 5, respectively.

  In this case, first, the main reinforcing bars 1 are held in a cylindrical shape by attaching the four main bars 1 at intervals of 90 degrees in the circumferential direction of the ring-shaped reinforcing bar holder 2. Then, the assembly work can be efficiently performed by attaching the next main reinforcement 1 between the main reinforcements 1 and 1 attached first.

In addition, if each reinforcing bar gripping tool 3 is temporarily attached to the ring-shaped reinforcing bar holder 2 with a fixing bolt 4 in advance, the main reinforcing bar 1 can be efficiently fixed to the ring-shaped reinforcing bar holder 2.
In this way, a plurality of main bars 1 are bridged on the outer side between the plurality of ring-shaped reinforcing bar holders 2, 2, and the outer part of each ring-shaped reinforcing bar holder 2, 2 is connected by the reinforcing bar gripping tool 3 and the fastening bolts 4, 5. By fixing, the plurality of main bars 1 can be assembled into a cylindrical shape. And if the assembly of the main reinforcement 1 is completed, the hoop reinforcement 8 will be arranged on the outer side.

  The present invention can easily assemble a plurality of main bars mainly used for a foundation pile of cast-in-place concrete without welding.

DESCRIPTION OF SYMBOLS 1 Main reinforcement 2 Ring-shaped reinforcing bar holder 2a Through hole 3 Reinforcing bar gripping tool 3a Reinforcing bar gripping part 3b Stopping part 3c Stopping part 3d Through hole 4 Stopping bolt 5 Fixing bolt 6 Nut 7 Fixing nut 8 Hoop muscle

Claims (3)

  A ring-shaped reinforcing bar holder for holding a plurality of reinforcing bars arranged in a cylindrical shape at predetermined intervals in the diameter direction, a plurality of reinforcing bar grips for holding the reinforcing bars, and both ends of the reinforcing bar gripping tool A plurality of reinforcing bar fixing bolts that are respectively fixed to the ring-shaped reinforcing bar holder, and one of the fixing bolts penetrates an end of the reinforcing bar gripping tool to hold the ring-shaped reinforcing bar And the other fastening bolt penetrates through the ends of the ring-shaped reinforcing bar holder and the reinforcing bar gripping tool, and a fastening nut is screwed into the end. Features a rebar assembly structure.   2. The reinforcing bar assembly according to claim 1, wherein the ring-shaped reinforcing bar holder is made of flat steel, H-shaped steel, angle steel, or channel steel. The reinforcing bar assembly according to claim 1 or 2, wherein a plurality of recesses for setting a reinforcing bar are provided on a side portion of the ring-shaped reinforcing bar holder.

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