JP5346244B2 - Method for assembling rebar rod for cast-in-place concrete pile and split rebar rod assembly device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To adopt a binding means by binding wires of which fixing operations are relatively easy and inexpensive, which does not thermally affect reinforcing bars, and which can reliably achieve a binding state without loosening as a binding means of split hoop reinforcements split into an appropriate number and main reinforcements to each intersecting part and to provide a technique for assembling a split reinforcement cage suitable for this. <P>SOLUTION: A plurality of split hoop reinforcements 4 split into an appropriate number are arranged at intervals from one another into a state with the inside of their circular parts open upward along the longitudinal direction of a rack made of a plurality of plate-like support members 2 and lateral members 3. A plurality of main reinforcements 5 are arranged in parallel at intervals with one another in a direction intersecting with the split hoop reinforcements 4 at right angles. The binding wires are wound and tightened from the inside over each intersecting part of the split hoop reinforcements 4 and the main reinforcements 5 in such a way that both end parts of the binding wires may be positioned inside the split hoop reinforcements 4 to assemble a split reinforcement cage. A plurality of split reinforcement cages are used and connected to one another by reinforcement joints 28 to form a cylindrical reinforcement cage. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a technique for assembling a reinforcing bar for cast-in-place concrete piles, and more particularly to an improved technique for assembling a divided reinforcing bar by dividing a target cylindrical reinforcing bar into an appropriate number.

  As for the assembly technology of this type of cast-in-place concrete piles, the divided reinforcing bar rods divided into a plurality of cylindrical reinforcing bar rods are assembled in advance at a factory etc., and the divided reinforcing bar rods are transported to the installation site by trucks etc. In the field, a construction technique of assembling and using these split reinforcing bar rods in a cylindrical reinforcing bar rod is conventionally known (Patent Document 1). And according to this prior art, in the case of split rebars divided into a plurality of parts, they can be stacked, so they can be stored in a stacked state or transported to the site. It is possible to obtain the advantage of being effective in reducing the space in

  Moreover, regarding the assembly technique of the split reinforcing bar rods, a pair of side plates formed with a plurality of hooking grooves that can be hooked with the main bars on the upper side portion formed in an upward convex arc shape are provided on both sides separately. The vertical plates are connected to each other by a plurality of vertical plates, and the height of each vertical plate is set to a height that can be supported by abutting from inside the arc-shaped divided hoop muscles obtained by dividing the hoop muscles. An apparatus for assembling a split reinforcing bar rod is known in which a plurality of hooking grooves that can be hooked to the split hoop bars are formed at intervals on the upper side portion (Patent Document 2). In this conventional assembling apparatus, the required number of main bars are engaged with and supported by the engaging grooves formed on the side plates on both sides, and the divided hoop bars are engaged with the engaging grooves formed on the upper sides of the vertical plates. By doing so, a semi-cylindrical divided reinforcing bar rod is assembled by supporting the upper convexly and welding each intersection of the main reinforcing bars and the divided hoop bars. By the way, in the case of this conventional assembling apparatus, since a plurality of divided hoop bars are assembled while being supported in a convex state at a predetermined interval, welding work for each intersection of the main bars and the divided hoop bars, etc. This connecting operation cannot be performed from the inside of the divided hoop muscles, but is performed from the outside.

Japanese Patent Laid-Open No. 9-177247 Utility Model Registration No. 3001130

  As described above, in the case of the conventional assembling apparatus, the connecting operation for the intersections of the main bars and the divided hoop bars cannot be performed from the inside of the divided hoop bars, but is performed from the outside. For this reason, when the binding wire is used as the coupling means, the tightening portion protrudes outside the split hoop muscle, and thus there is a troublesome problem that a large amount of covering is required. Although it is possible to create and apply a dedicated fixing means that fits each intersection of the main and split hoops, a simple work can provide a fixed state without loosening, and it does not protrude outward. It is not easy to realize the fixing means, and there is a problem that the cost becomes high. Therefore, as a coupling means in the case of a conventional assembly apparatus, welding is often used as a relatively safe coupling means, but there are difficulties in workability in consideration of the working state at the time of welding to the intersection, There was also the problem of heat effects on the rebar due to welding.

  In view of the state of the prior art, the present invention is a coupling means for each intersection of the main muscle and the divided hoop muscle, and its fixing operation is relatively simple and inexpensive, and there is no problem of thermal influence, and there is no looseness. It is an object of the present invention to achieve practical use of binding by binding wires by employing a binding means using binding wires that can be accurately obtained and providing a method and apparatus for assembling divided reinforcing bars suitable for it.

  In order to solve the above-mentioned problem, in the invention of claim 1, a plurality of divided hoop muscles divided into an appropriate number are arranged at intervals along the longitudinal direction of the gantry with the inside of the arc portion opened upward. In addition, after arranging a plurality of main bars in parallel with each other in a direction perpendicular to the divided hoop muscles, for each crossing portion of the divided hoop muscles and the main bars, both ends of the binding line are Assemble the rebar rod by winding and tightening from the inside so as to be located inside the split hoop, and use a plurality of the divided rebar rods to connect them with a rebar joint to form a cylindrical rebar rod And Furthermore, in the invention of claim 2, each of the intersecting portions of the split hoop and main bars is wound in an inclined manner with one binding line and tightened, and the binding line is inclined at the intersecting portion where the main bars are adjacent to each other. It is characterized by changing the direction so as to be alternately reversed. According to a third aspect of the present invention, there is provided a plate-like support member in which a substantially arc-shaped recess is formed in an open state on the inner side, and a plurality of engaging grooves capable of engaging main bars are formed on the periphery of the recess. A plurality of support members that are installed in a state where the plate-like support members are spaced apart from each other, and a plurality of transverse members that support the divided hoop muscles that are passed between the plate-like support members. A plurality of divided hoop bars divided into appropriate numbers on the member are arranged in a state of being spaced apart along the longitudinal direction of the gantry in a state where the inside of the arc portion is opened upward, and the main bars are formed in the plate shape. It is arranged in parallel in a state where it is engaged with the engaging groove formed in the support member and spaced apart, and each crossing part of the divided hoop muscle and the main reinforcement is wound from the inside with a binding wire and tightened. It is characterized by that.

According to the present invention, the following effects can be obtained.
(1) In a state where a plurality of divided hoop muscles divided into appropriate numbers are arranged along the longitudinal direction of the gantry with the inner side of the arc portion thereof opened upward, each intersection of the divided hoop muscles and the main bars Since these are coupled by a binding line, it is possible to perform the tightening operation of the binding line from the inside of the divided hoop muscle.
(2) Therefore, it is possible to wind and tighten each intersection of the split hoop muscle and the main bar from the inside so that both end portions are located inside the split hoop muscle by the binding line.
(3) By the tightening operation using the binding wire, each crossing portion of the split hoop and the main bar is accurately connected to the binding wire without causing the knot or both ends of the binding wire to protrude to the outside of the reinforcing bar rod and without looseness. Therefore, it is possible to form a split reinforcing bar with high rigidity and high accuracy.
(4) By the above, the problem of excessive fogging due to the protruding part of the hoop bar is eliminated, and there is no concern about the thermal effect on the bar unlike welding, and the rigidity and accuracy of the bar is easy to handle. Can be provided by a tightening operation using a simple and inexpensive binding wire.

It is the whole explanatory view showing the implementation state of the present invention. It is the partial block diagram which expanded and showed the plate-shaped support member used by this invention. It is the elements on larger scale which expanded and showed the A section in FIG. It is the partial block diagram which expanded and showed the installation state of the said plate-shaped support member. It is the left view which showed the installation mechanism. It is the front view which expanded and showed the center horizontal member passed between the said plate-shaped support members. It is the left view which expanded and showed the center horizontal member. It is the front view which expanded and showed the both-sides horizontal member arrange | positioned at both sides. It is the top view which expanded and showed the same both-sides horizontal member. It is the right view which expanded and showed the same side member. It is the perspective view which showed the combined state which fastened the cross | intersection part of the main muscle and the division | segmentation hoop muscle with the binding line. It is the partial explanatory view which showed the state which connected the assembled rebar rods with the reinforcing bar joint. It is the left view which showed the case where the connection state of FIG. 12 was seen from the side.

  In the present invention, in a factory or the like, a split reinforcing bar rod composed of a split hoop bar and a main bar is assembled in advance, and transported to the installation site in the state of the split reinforcing bar rod, and the split reinforcing bar rods are connected to each other at the site to form a cylindrical reinforcing bar. The assembly form which forms a ridge is adopted. In assembling the split reinforcing bar rod, a simple and inexpensive coupling means using a binding wire is employed. That is, the split hoop muscles are arranged on the gantry in a state where the inner side of the arc part is opened upward, and in the state where the split hoop bars are opened upward, the intersections of the split hoop muscles and the main bars are connected by the binding lines. By joining from the inside, the tightening portion and both ends of the binding wire do not protrude to the outside of the hoop muscle, and a strong joined state without backlash can be easily realized. As a result, it is possible to provide a high-rigidity and high-precision reinforcing bar that is easy to handle and simple and inexpensive.

  FIG. 1 is an overall explanatory view showing an embodiment of the present invention. As shown in the drawing, in the assembling apparatus 1 for concrete piles according to the present embodiment, four plate-like support members 2 are installed at intervals, and a divided hoop is provided between these plate-like support members 2. A gantry is constructed by passing a plurality of transverse members 3 for muscle support. In the figure, reference numeral 4 denotes an arc-shaped divided hoop line obtained by dividing a circular hoop line into two, and the inner side of the circular arc part is opened upward on a plurality of horizontal members 3 passed between the plate-like support members 2. It is arranged in a self-supporting state with a gap. Reference numeral 5 denotes a main bar, which is arranged in parallel in a state of being hooked in a hooking groove formed in the plate-like support member 2 and spaced apart. And each cross | intersection part of those division | segmentation hoop bars 4 and the main reinforcement 5 is wound from the inner side with a binding wire, and is tightened, A semi-cylindrical division | segmentation reinforcing bar rod is formed.

  FIG. 2 is a partial configuration diagram showing the plate-like support member 2 in an enlarged manner, and FIG. 3 is a partial enlarged view showing the portion A in FIG. 2 further enlarged. As shown in the figure, a substantially arc-shaped recess 6 is formed in the plate-like support member 2 so as to open upward. In addition, a plurality of engaging grooves 7 in which the main bar 5 can be engaged are formed in the periphery of the recess 6. As shown in FIG. 3, in the engaging groove 7 of the present embodiment, the main reinforcing bar 5 is easily inserted into the engaging groove 7 when the main reinforcing bar 5 is engaged, and the main reinforcing bar 5 is inserted into the engaging groove after the assembly of the divided reinforcing bar rods is completed. Although the case where it formed in the taper shape which enlarged the upper opening width so that it was easy to pull out from the engaging groove 7 when removing from 7 was illustrated, it cannot be overemphasized that a parallel groove is also possible. Furthermore, an opening 8 is formed in the lower central portion of the recess 6 so as to pass through the central lateral member 3a made of an angle material, and both lateral members 3b made of an angle material are disposed at upper positions on both sides of the opening 8. Openings 9 and 10 through which 3c is inserted are formed. That is, in the present embodiment, the case where the transverse member 3 for supporting the divided hoop muscle 4 is constituted by the central transverse member 3a and both lateral members 3b and 3c is shown. In the figure, 11 is a bolt insertion hole for fixing the installation mechanism.

  FIG. 4 is a partial configuration diagram illustrating the installation state of the plate-like support member 2 in an enlarged manner, and FIG. 5 is a left side view of the installation mechanism. As shown in the figure, the plate-like support member 2 is installed so as to be adjustable in level via an installation mechanism 12 fixed to the lower part thereof. The installation mechanism 12 has base members 13 and 14 on both sides, and these base members 13 and 14 are formed from both sides by bolt nuts 15 through the bolt insertion holes 11 formed in the lower part of the plate-like support member 2. Tighten and fix. Further, nuts 16 and 17 are welded to lower flange portions of the base members 13 and 14, and the installation state of the plate-like support member 2 is adjusted by adjusting bolts 18 and 19 screwed into the nuts 16 and 17. It is configured to be adjustable.

  FIG. 6 is an enlarged front view showing a central lateral member passing between the plate-like support members 2, and FIG. 7 is a left side view of the central lateral member. Of the plurality of transverse members 3 passed between the plate-like support members 2 in order to support the arc-shaped divided hoop muscles 4, the central transverse member disposed at the lower central portion of the plate-like support member 2 shown in FIG. 2. As the member 3a, the angle member is used with the open side down as shown in FIG. 7. As shown in FIG. 6, the engaging groove 20 that can be engaged with the divided hoop muscle 4 is spaced at the upper corner as shown in FIG. What was formed by opening is used.

  8 is an enlarged front view showing both side members disposed on both sides of the plate-like support member 2, FIG. 9 is a plan view of the both side members, and FIG. 10 is a right side view thereof. . Similarly, of the plurality of horizontal members 3 passed between the plate-like support members 2, both side horizontal members 3b and 3c arranged at the upper positions on both sides of the central horizontal member 3a shown in FIG. 10 is used in a state where one side 21 of the angle member is downward and the other side 22 is set up vertically, and is engaged with the split hoop muscle 4 at the outer edge of the sides 21 and 22 on both sides thereof. What formed the possible engaging grooves 23 and 24 at intervals is used. Both side members 3b and 3c have the same configuration, and either one of the two side parts 21 and 22 is selected as a lower side part, and the other side part is set up vertically, whereby the both side member 3b. Or it will be used as 3c.

  Next, an assembling method of the cast-in-place concrete pile reinforcing bar according to the present invention will be described. First, in a factory or the like, the plate-like support member 2 shown in FIG. 2 is set in a predetermined manner as shown in FIG. 1 through an installation mechanism 12 secured to the lower portion using bolts and nuts 15 as shown in FIGS. Install the required number at intervals. Thereafter, the central lateral member 3a is inserted into the openings 8 formed in the respective plate-like support members 2, and the lateral lateral members 3b and 3c are inserted into the openings 9 and 10 so that the central lateral members 3a and The lateral member 3 composed of the lateral lateral members 3 b and 3 c is passed between the plate-like support members 2. In addition, the installation state of the plate-like support member 2 can be adjusted by adjusting bolts 18 and 19 as necessary.

  As described above, when a gantry composed of a required number of plate-like support members 2 installed at a predetermined interval is formed, first, a divided hoop bar 4 obtained by dividing a circular hoop bar into an appropriate number is shown in FIG. As shown in FIG. 1, the engaging groove 20 formed with a gap in the central transverse member 3a passed between the respective plate-like support members 2 and the engaging groove 23 formed with the same interval in the lateral members 3b, 3c. , 24 and the three hooking grooves 20, 23, 24 are set so that each of the divided hoop muscles 4 is self-supported with its arc portion inside open upward. Thereafter, the main bars 5 are inserted into the hooking grooves 7 formed on the plate-like support members 2 from above the divided hoop bars 4 and engaged with each other, and the required number of main bars 5 in the direction perpendicular to the divided hoop bars 4 is obtained. Set.

  Next, it is engaged with the engaging groove 20 of the central transverse member 3a and the engaging grooves 23 and 24 of both lateral members 3b and 3c passed between the respective plate-like support members 2, and the free-standing state in which the inside of the arc portion is opened upward. Each of the divided hoop bars 4 set in the cross section and each main bar 5 which is hooked into the hook groove 7 formed in each plate-like support member 2 and set in a direction perpendicular to the divided hoop bars 4 It moves to the cross | joining part joint operation | work which couple | bonds a part with a binding wire and forms a split reinforcement bar. FIG. 11 is a perspective view showing a coupled state in which the intersecting portion of the divided hoop muscle 4 and the main muscle 5 is fastened by a binding line. As shown in the figure, this crossing joint operation is performed by using the binding wire 25 to cross each of the divided hoop muscles 4 and the main muscles 5 so that the knots 26 and both end portions 27 are located inside the divided hoop muscles 4. It is important that the part is wound from the inside of the divided hoop muscle 4 and tightened. Thereby, the problem of the excessive fogging by the protrusion part to the outer side of the hoop muscle 4 can be eliminated. When the above-described intersection connecting work by the binding line to each intersection of each divided hoop bar 4 and each main bar 5 is completed, a divided reinforcing bar rod is formed, but at the time of subsequent movement of the divided reinforcing bar rod It is also effective to arrange a reinforcing member of an appropriate shape inside the split reinforcing bar rod and to bind and fix it to the main reinforcing bar 5 in order to avoid the deformation in the above and securely hold the semi-cylindrical shape.

  When the split reinforcing bar rod is assembled as described above, it is temporarily stored in the state of the split reinforcing rod rod or transported to the installation site. In this case, the divided reinforcing bar rod is in a state where the cylinder is divided and can be stored and transported in a stacked manner, so that space efficiency can be improved. Then, the divided reinforcing bar rods transported to the installation site lift the upper divided reinforcing rod rods and move them onto the lower divided reinforcing rod rods, and as shown in FIG. 12 and FIG. By connecting the end portions of each of them with an appropriate reinforcing bar joint 28, a target cylindrical reinforcing bar can be easily formed. Incidentally, the reinforcing member installed to maintain the shape of the split reinforcing bar rod is removed depending on the case in the process of forming the reinforcing bar rod.

1: assembly device, 2: plate-like support member, 3: transverse member, 4: split hoop bar, 5: main bar, 6: recess, 7: hook groove, 8-10: opening, 11: bolt insertion hole, 12 : Installation mechanism, 13, 14: Base material, 15: Bolt nut, 16, 17: Nut, 18, 19: Adjustment bolt, 20: Engagement groove, 21, 22: Side part, 23, 24: Engagement groove, 25 : Binding wire, 26: knot, 27: both ends, 28: rebar joint

Claims (3)

  A plurality of divided hoop bars divided into an appropriate number are arranged at intervals along the longitudinal direction of the gantry with the inside of the arc portion opened upward, and in a direction perpendicular to the divided hoop bars. A plurality of main bars are arranged in parallel at intervals, and then a binding wire is wound from the inside so that both ends thereof are located inside the divided hoop bars at the intersections of the divided hoop bars and the main bars. A method of assembling a reinforcing bar for a cast-in-place concrete pile, comprising assembling divided reinforcing bars by tightening together and connecting a plurality of the divided reinforcing bars with a reinforcing bar joint to form a cylindrical reinforcing bar.   Each intersection of the split hoop and main bars is wound with a single binding line in an inclined manner and tightened, and the inclination directions of the binding lines at the adjacent intersections of the main bars are alternately reversed. 2. The method for assembling a reinforcing bar for a cast-in-place concrete pile according to claim 1, wherein the method is changed.   A plurality of plate-like support members formed with a plurality of hooking grooves on which the main bars can be hooked on the periphery of the recesses are formed in a state where the substantially arc-shaped recesses are opened upward on the inside, and these plate-like support members And a plurality of transverse members for supporting the divided hoop muscles passed between the plate-like support members, and divided into a number as appropriate on the transverse members. A plurality of divided hoop bars are arranged in a state of being spaced apart along the longitudinal direction of the gantry in a state where the inside of the arc portion is opened upward, and the main bars are engaged with the hook grooves formed on the plate-like support member. The cast-in-place concrete piles are arranged in parallel so as to be spaced apart from each other and can be tightened by wrapping each intersection of the divided hoop bars and the main bars from the inside with a binding line. Assembly of rebar bars for steel bars Location.

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