JP2009108611A - Reinforcement erecting tool and reinforcement erecting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcement erecting tool and a reinforcement erecting method that can easily remove a reinforcement from the tool on the lower end side of a suspended reinforcement. <P>SOLUTION: The reinforcement erecting tool includes a reinforcement holding beam 20 held to a lifting means through a suspension cable 14 and provided with reinforcement through-holes mounted with sheath tubes 30 for limiting the horizontal movement of the inserted reinforcements, and lined up based on the reinforcement arrangement spaces in the longitudinal direction of the beam; a reinforcement hanging chain 40 connected at one end to the reinforcement holding beam 20 to hang from the reinforcement holding beam 20; and a reinforcement receiving implement 60 mounted to the lower end of the reinforcement hanging chain 40 to hold the reinforcement. The reinforcement holding beam 20 limits the horizontal movement of the reinforcement in the position of the sheath tube 30, and the reinforcement is held by the reinforcement receiving implement 60 at the lower end of the reinforcement hanging chain 40. The reinforcement erecting tool is moved into a reinforcement arranging position by the lifting means, and the reinforcement receiving implement 60 is removed from the reinforcement to bind the reinforcement to a lower reinforcement. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a jig for building a reinforcing bar arranged in a height direction on a wall, a pillar, or the like, and a method for building the reinforcing bar.

  Conventionally, reinforcing bars for caisson and culvert walls, as well as building walls and pillars, are bundled and lifted and temporarily placed temporarily near the bar arrangement. Reinforcing bars that are arranged along the height direction (hereinafter referred to as longitudinal bars) are erected vertically by human power, aligned with the lower reinforcing bars, and secured a predetermined joint length. The longitudinal bars and the lower reinforcing bars are united. In this way, the bar arrangement work is often performed manually by the workers, and if the vertical bar is thick and long, a great deal of labor is required for the bar arrangement work.

An invention that can save labor for bar arrangement work by suspending a jig that vertically hangs vertical bars at a predetermined bar arrangement interval to a bar arrangement part of a vertical bar with a lifting machine It is disclosed in Document 1 and Patent Document 2. In Patent Document 1, a plurality of chains arranged at predetermined bar arrangement intervals are hung on a jig suspended by a lifting machine, and a jig provided with a metal fitting that can be connected to a vertical bar at the end of the chain. , And an invention relating to a method for constructing a reinforcing bar using the jig is disclosed. Further, Patent Document 2 discloses an invention relating to a jig provided with a groove portion into which a vertical bar having a lock nut attached at an end portion is inserted, and a detachment prevention bar for restricting the vertical bar from coming off.
JP-A-8-218638 JP 2000-345708 A

  However, when the jigs disclosed in Patent Document 1 and Patent Document 2 are used, the work of removing the vertical bars suspended from the jig must be performed on the upper end side of the vertical bars. For this reason, every time the worker removes the vertical bar from the jig, it is necessary to perform work near the upper end of the vertical bar, which causes work at a high place and inefficient bar arrangement work.

  The present invention has been made to solve such a problem, and a reinforcing bar erection jig capable of easily removing a reinforcing bar from the jig at the lower end side of the suspended reinforcing bar, and a suspension. An object of the present invention is to provide a method for constructing a reinforcing bar using a reinforcing bar mounting jig capable of easily removing the reinforcing bar from the jig in the vicinity of the lower end of the reinforcing bar.

  In order to achieve the above object, a reinforcing bar erection jig according to the present invention is held by lifting means via a suspension member, and an opening for restricting horizontal movement of the inserted reinforcing bar is a predetermined interval in the beam longitudinal direction. Reinforcing bar holding beams arranged in line, one end connected to the reinforcing bar holding beam, suspended from the reinforcing bar holding beam, and attached to the other end of the reinforcing bar hanging material to hold the reinforcing bar And a reinforcing bar holding material.

  The arrangement interval of the openings arranged in a row may be set based on the arrangement interval of the reinforcing bars.

  Further, a plurality of opening rows having different opening intervals may be formed in the reinforcing bar holding beam.

  Moreover, you may make it further equip the said opening with the sheath pipe | tube which can penetrate the said reinforcing bar.

  Further, in order to achieve the above object, a reinforcing bar erection method according to the present invention is a reinforcing bar holding beam that is suspended by a lifting means and has openings arranged at predetermined intervals in the longitudinal direction of the beam. The movement is restricted by the opening, the reinforcing bar is held by a reinforcing bar holding member attached to the lower end of a reinforcing bar suspension member suspended from the reinforcing bar holding beam, and the reinforcing bar mounting jig is attached by the lifting means. The reinforcing bar is moved to a bar arrangement position, the reinforcing bar holding material is removed from the reinforcing bar, and the reinforcing bar is bound to the reinforcing bar from below.

  As described above, according to the present invention, it is possible to remove the reinforcing bar from the reinforcing bar mounting jig by removing the reinforcing bar locking member suspended from the reinforcing bar holding beam from the reinforcing bar. This eliminates the need for the worker to work up to the vicinity of the upper end of the reinforcing bar every time the reinforcing bar is removed from the reinforcing bar mounting jig. Thereby, labor can be saved in the bar arrangement work.

  BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out a reinforcing bar mounting jig and a reinforcing bar mounting method according to the present invention will be described below with reference to the drawings. In addition, this embodiment is embodiment regarding the bar arrangement of a vertical line.

  FIG. 1: has shown the perspective view of the jig 10 for reinforcing bar construction which concerns on embodiment of this invention. The reinforcing bar mounting jig 10 is lifted by a lifting machine such as a crane (not shown) and supports the weight of the reinforcing bar 50, and is attached to the reinforcing bar holding beam 20 so as to horizontally move the upper part of the reinforcing bar 50 penetrating therethrough. The limiting sheath pipe 30, the reinforcing bar receiver 60 that holds the lower end of the reinforcing bar 50, and the suspension chain 40 that suspends the reinforcing bar receiver 60 from the reinforcing bar holding beam 20 are provided.

  The reinforcing bar holding beam 20 includes a steel main body beam 21 suspended in a vertical direction during lifting, and two steel reinforcing bar upper end holding beams 22 welded perpendicularly to both surfaces of the main body beam 21. It is configured. Two suspension pieces 13 are welded to one end surface of the main body beam 21 in the longitudinal direction. The suspension piece 13 has a substantially semicircular shape, and a through-hole through which a pin or bolt of the lifting shackle 16 can be inserted is formed at the center thereof. The lifting shackle 16 is attached to the suspension piece 13, and the reinforcing bar building jig 10 is lifted through the suspension cable 14 connected to the lifting shackle 16. Each of the reinforcing bar upper end holding beams 22 is formed with a circular opening at a predetermined interval, and a sheath 30 is fitted and welded to the opening. Further, in the vicinity of the lower end of the vertical surface 21 in the figure, a shackle insertion hole 12 through which a pin or bolt of the shackle 11 for stable beam can be inserted is formed at a position close to each sheath 30. When the number of sheath pipes 30 installed in each reinforcing bar upper end holding beam 22 is different, the shackle insertion hole 12 is formed in accordance with the position of the sheath pipe 30 of the reinforcing bar upper end holding beam 22 with a larger number of sheath pipes 30 installed.

  The sheath tube 30 is a carbon steel pipe for piping (SGP pipe). The inner diameter of the sheath 30 is set to a size obtained by adding a slight allowance to the diameter of the reinforcing bar 50 to be inserted. This facilitates insertion of the rebar 50 into the sheath 30 and prevents excessive swinging of the rebar 50 during lifting of the reinforcing bar mounting jig 10. Further, the installation interval of the sheath tube 30 is determined based on the arrangement interval of the reinforcing bars 50 to be constructed. For example, if the distance between the sheaths 30 installed on one reinforcing bar upper end holding beam 22 is set to 50 mm, the reinforcing bars 50 can be arranged at intervals of 50 mm, 100 mm, 150 mm, etc., which are multiples of 50 mm. That is, when the bar arrangement interval is a multiple of 50 mm, the reinforcing bars 50 can be arranged at the same interval as the bar arrangement interval. If the distance between the sheaths 30 installed on the other reinforcing bar upper end holding beam 22 is set to 60 mm, the reinforcing bars 50 can be arranged at intervals of 60 mm, 120 mm, 180 mm, etc., which are multiples of 60 mm. That is, when the bar arrangement interval is a multiple of 60 mm, the reinforcing bars 50 can be arranged at the same interval as the bar arrangement interval.

  The reinforcing bar receiver 60 is made of synthetic resin, wood, steel, or the like. FIG. 2 is a cross-sectional view of the reinforcing bar mounting jig 10 indicated by arrows II-II in FIG. As shown in the figure, the reinforcing bar receiver 60 is formed with a recess 62 that can accommodate the end of the reinforcing bar 50. The concave portion 62 prevents the reinforcing bar 50 from falling off the reinforcing bar receiver 60. In addition, a shackle 61 for the receiver is fixedly attached to the side surface of the reinforcing bar receiver 60.

  The suspension chain 40 connects the stable beam shackle 11 attached to the shackle insertion hole 12 formed in the main body beam 21 and the receiver shackle 61 attached to the reinforcing bar receiver 60. The suspension chain 40 suspends the reinforcing bar receiver 60 on which the weight of the reinforcing bar 50 acts, and transmits the tension to the reinforcing bar holding beam 20 via the stable beam shackle 11. The length of the suspension chain 40 is set to a length that gives a slight margin to the distance between the connecting shackle 11 for stabilizing beam and the shackle 61 for receiving tool.

  Next, a method of building a reinforcing bar using the reinforcing bar building jig 10 will be described with reference to FIGS.

  First, as shown in FIG. 3, a reinforcing bar 50 is installed on the reinforcing bar erection jig 10. In order to arrange the reinforcing bars 50 at a predetermined interval, the reinforcing bar mounting jig 10 in which the sheaths 30 are arranged at the same or almost the same as the vertical bar arrangement interval is selected. The selected reinforcing bar mounting jig 10 is placed on the assembly yard so that the sheath 30 faces the horizontal direction. Then, the floor plate 70 is laid in parallel with the placed reinforcing bar laying jig 10. By laying the floor plate 70, the reinforcing bars 50 are supported at multiple points to suppress the bending of the reinforcing bars 50, and the reinforcing bars 50 are prevented from directly contacting the ground. Next, one end of the suspension chain 40 is connected to the stabilizing beam shackle 11 and the other end is connected to the receiving shackle 61. The distance between the stable beam shackle 11 and the receiving shackle 61 is set so that a part of the reinforcing bar 50 is positioned in the sheath tube 30 when the tip of the reinforcing bar 50 is accommodated in the recess 62 (FIG. 2). . Next, the reinforcing bar 50 is inserted into the sheath pipe 30 (the sheath pipe installed on the lower reinforcing bar upper end holding beam in the drawing), and the tip of the reinforcing bar 50 is accommodated in the recess 62 formed in the reinforcing bar receiving part 60.

  When all the reinforcing bars 50 are held by the reinforcing bar mounting jig 10, the suspension cable 14 with the lifting shackle 16 attached to the end is connected to the crane hook 15 as shown in FIG. 4. Next, the lifting shackle 16 is attached to the suspension piece 13, and the rebar building jig 10 is built up by a crane (not shown). Then, the reinforcing bar building jig 10 is lifted with a crane, and the reinforcing bar building jig 10 is suspended up to the reinforcing bar 50. A lower reinforcing bar 80 that binds to the reinforcing bar 50 rises from the top of the concrete of the structure 85 at the reinforcing bar 50. Then, as shown by the arrows in the figure, the reinforcing bar mounting jig 10 is lowered to bring the reinforcing bar 50 and the lower reinforcing bar 80 close to each other.

  When the reinforcing bar 50 and the lower reinforcing bar 80 come close to each other, the reinforcing bar 50 is lifted in the direction of the arrow in FIG. 5 by human power, and the reinforcing bar 50 is removed from the reinforcing bar receiver 60. Then, after finely adjusting the position of the reinforcing bar 50 so that the reinforcing bar 50 and the lower reinforcing bar 80 have a predetermined positional relationship, a predetermined joint length is secured and the reinforcing bar 50 and the lower reinforcing bar 80 are bound. At this time, since the upper part of the reinforcing bar 50 is located in the sheath 30, the horizontal shake of the upper part of the reinforcing bar 50 is limited. Therefore, alignment of the reinforcing bar 50 and the lower reinforcing bar 80 can be easily performed.

  When all the reinforcing bars 50 and the lower reinforcing bars 80 are bound, as shown by the arrows in FIG. 6, the reinforcing bar mounting jig 10 is lifted by a crane, and the upper part of the reinforcing bars 50 is extracted from the sheath tube 30. Then, the reinforcing bar mounting jig 10 is moved and placed on the assembly yard.

  As described above, according to the reinforcing bar mounting jig and the reinforcing bar mounting method according to the embodiment of the present invention, the tip (lower end in the figure) of the reinforcing bar 50 is removed from the recess 62 formed in the reinforcing bar receiver 60. Thus, the reinforcing bar 50 can be removed from the reinforcing bar mounting jig 10. This eliminates the need for the worker to work up to the vicinity of the upper end of the reinforcing bar every time the reinforcing bar is removed from the reinforcing bar mounting jig. As a result, it is possible to eliminate work at high places and to save labor in the work of bar arrangement.

  In addition, since the horizontal movement of the upper part of the reinforcing bar 50 is restricted by the sheath tube 30, it is possible to prevent the reinforcing bar 50 from excessively swinging when the reinforcing bar mounting jig 10 is lifted. Further, when the reinforcing bar 50 is bound to the lower reinforcing bar 80, the reinforcing bar 50 can be lifted and the lower reinforcing bar 80 can be finely adjusted to align the reinforcing bar 50 and the lower reinforcing bar 80. For this reason, it is possible to save labor for positioning the reinforcing bars and for holding the reinforcing bars 50. Further, when the length of the sheath tube 30 is increased, the posture of the reinforcing bar 50 can be more stabilized. However, when there is no room for the opening formed in the reinforcing bar upper end holding beam 22 with respect to the diameter of the reinforcing bar 50, The sheath tube 30 is not necessarily installed.

  Moreover, since the reinforcing bar mounting jig 10 according to the above-described embodiment includes two arrays in which the sheaths 30 are installed at different intervals, various reinforcing bar mounting intervals can be achieved with a small number of reinforcing bar mounting jigs 10. It becomes easy to cope with. For this reason, the number of rebar laying jigs 10 manufactured can be reduced as compared with the prior art, and the jig manufacturing cost can be reduced. In addition, by expanding the above-described reinforcing bar upper end holding beam 22 and increasing the arrangement of the sheaths 30, the reinforcing bar laying jig 10 having more installation intervals of the sheaths 30 can be obtained.

  In the above-described embodiment, the reinforcing bar mounting jig 10 including the linear reinforcing bar holding beam 20 has been described, but the shape of the reinforcing bar holding beam 20 is not particularly limited. FIG. 7 shows another embodiment of the reinforcing bar building jig 10, and is a plan view seen from above the reinforcing bar building jig 10 when suspended. As shown in the drawing, two reinforcing bar upper end holding beams 22 each having a predetermined arc are welded to both surfaces of a main body beam 21 having a predetermined curvature. The sheath tube 30 is arranged on a predetermined radius of curvature. Thereby, it is possible to arrange the reinforcing bars 50 on a predetermined curve. Therefore, it can be used when a vertical streak is built on a wall having a curve or a column whose cross section forms a cylinder. Further, the reinforcing bar holding beam 20 may be formed in a ring shape, and the sheath tube 30 may be arranged on the circumference. Further, the linear reinforcing bar holding beams 20 may be connected to each other and assembled into a triangle or a quadrangle.

  In the above-described embodiment, the method of housing the lower end portion of the reinforcing bar 50 in the recess 62 and suspending the reinforcing bar 50 from the reinforcing bar holding beam 20 has been described. However, the method of suspending the reinforcing bar 50 is not limited. FIG. 8 is a perspective view showing another embodiment of the reinforcing bar erection jig 10. As shown in the figure, a reinforcing bar receiving clamp 90 capable of gripping a reinforcing bar may be attached to one end of the suspension chain, and the reinforcing bar 50 may be suspended by holding the reinforcing bar with the reinforcing bar receiving clamp 90. At this time, if the reinforcing bar receiving clamp 90 is displaced from the binding position (lap joint portion or the like) with the lower reinforcing bar 80 shown in FIG. 6, the binding work is performed while the reinforcing bar 50 is held by the reinforcing bar building jig 10. Can be implemented.

  Moreover, in the said embodiment, although the reinforcing bar installation jig | tool 10 which installed the sheath pipe | tube 30 in the reinforcing bar holding beam 20 formed by the steel plate assembled in the cross shape was demonstrated, as shown in FIG. The beam 20 may be made of H-shaped steel, and the reinforcing bar through hole 51 may be formed in the upper and lower flanges of the reinforcing bar holding beam 20 to penetrate the reinforcing bar 50. A shackle insertion hole 12 is formed in the lower flange of the reinforcing bar holding beam 20, and the suspension chain 50 is connected to the reinforcing bar holding beam 22 via the stable beam shackle 11 attached to the shackle insertion hole 12. Thereby, the horizontal movement of the upper part of the reinforcing bar 50 can be restricted by the reinforcing bar through-holes 51 formed at a predetermined interval (web height), and when the reinforcing bar mounting jig 10 is lifted. Further, the swinging of the reinforcing bars 50 can be prevented and the positioning of the reinforcing bars 50 can be easily performed. Further, in order to facilitate the insertion of the reinforcing bar 50 into the reinforcing bar through hole 51 formed in the upper and lower flanges, a sheath tube may be installed to guide the insertion of the reinforcing bar 50.

The perspective view of the jig for reinforcing bar construction concerning the embodiment of the present invention. Sectional drawing of the jig for reinforcing bar installation shown by arrow II-II in FIG. Explanatory drawing which showed the construction method of the reinforcing bar according to the procedure. Explanatory drawing which showed the construction method of the reinforcing bar according to the procedure. Explanatory drawing which showed the construction method of the reinforcing bar according to the procedure. Explanatory drawing which showed the construction method of the reinforcing bar according to the procedure. The top view which showed other embodiment of the jig for reinforcing bar construction. The perspective view which showed other embodiment of the jig for reinforcing bar construction. The perspective view which showed other embodiment of the jig for reinforcing bar construction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Rebar erection jig 11 Stable beam shackle 12 Shackle insertion hole 13 Suspension piece 14 Suspension cable 15 Crane hook 16 Lifting shackle 20 Reinforcement retaining beam 21 Body beam 22 Rebar upper end retaining beam 30 Sheath tube 40 Suspension chain 50 Rebar ( Longitudinal)
51 Reinforcing Bar Through Hole 60 Reinforcing Bar Receptor 61 Shackle 62 for Receiving Recessor Recess 70 Laying Plate 80 Lower Reinforcing Bar 85 Structure 90 Clamp

Claims (5)

Reinforcing bar holding beams that are held by lifting means via suspension members, and openings that limit horizontal movement of the inserted reinforcing bars are arranged at predetermined intervals in the beam longitudinal direction;
One end of the reinforcing bar holding beam is connected to the reinforcing bar holding beam.
Reinforcing bar holding material that is attached to the other end of the reinforcing bar suspension and holds the reinforcing bar,
Reinforcing bar construction jig characterized by comprising.   The reinforcing bar mounting jig according to claim 1, wherein an arrangement interval of the openings arranged in a row is set based on an arrangement interval of the reinforcing bars.   3. The reinforcing bar building jig according to claim 1, wherein a plurality of opening rows having different arrangement intervals of the openings are formed in the reinforcing bar holding beam.   The rebar building jig according to any one of claims 1 to 3, wherein a sheath that allows the rebar to be inserted is attached to the opening. A rebar holding beam suspended by lifting means and having openings arranged at predetermined intervals in the longitudinal direction of the beam, the horizontal movement of the rebar is restricted by the opening, and the rebar suspension suspended from the rebar holding beam Hold the rebar with a rebar retainer attached to the lower end of the material,
The reinforcing bar laying jig is moved to a bar arrangement position by the lifting means, the reinforcing bar holding material is removed from the reinforcing bar, and the reinforcing bar is bound to a reinforcing bar from below. Construction method.

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