JP6522217B1 - Rebar arrangement method for wall rebar, lifting aid device for reinforcing bar material and lifting device - Google Patents

Abstract

An object of the present invention is to provide a method of arranging wall reinforcing bars capable of easily arranging wall reinforcing bars, and a lifting aid device and lifting apparatus for reinforcing bars used in the method of arranging wall reinforcing bars.
In a reinforcing bar arranging method of a wall reinforcing bar, a plurality of reinforcing bars 11 arranged such that longitudinal directions are parallel to each other, and a spacing maintaining line 12 connecting adjacent reinforcing bars 11 at a predetermined interval. The reinforcing bar unit 1 provided with and along the wall base 2 of the construction site is used as a wall reinforcing bar. Reinforcement method of the wall rebar, hook the reinforcement 11 of the outer end side of the rebar unit 1 to the lifting part 42 of the forklift 4 which is a lifting device, and support the lifting core of rebar for the winding core side of the rebar 1 The outer end side of the reinforcing bar unit 1 is lifted along the wall foundation 2 by relatively raising the lifting portion 42 of the forklift 4 while keeping the reinforcing bar unit 1 in a wound state by applying to the device 3 It raises relatively from the auxiliary | assistance apparatus 3, rotates the reinforcement unit 1 to the circumferential direction, and expand | deploys.
[Selected figure] Figure 5

Description

  The present invention relates to a method of arranging wall reinforcing bars in order to make a reinforcing bar unit in which a plurality of reinforcing bars are arranged in an interdigitated manner along a wall foundation as a wall reinforcing bar, a reinforcing bar used in the method of arranging wall reinforcing bars The present invention relates to a lifting assistance device and a lifting device.

  In a reinforced concrete structure, walls, floors, etc. are constructed by a large number of reinforcing bars and concrete which are assembled in vertical and horizontal directions. A large number of reinforcing bars are arranged in concrete. There is provided a reinforcing bar unit (roll-up type reinforcing bar bundle) capable of rationally arranging a large number of reinforcing bars (see, for example, Patent Document 1).

  The reinforcing bar unit (winding-type reinforcing bar bundle) is composed of a large number of reinforcing bars (rebars) arranged in parallel, and a large number of small diameter spacing lines (iron wires) arranged in the direction orthogonal to the reinforcing bars. , And the reinforcing material and the spacing line are connected. The reinforcing bar unit is wound around a cylindrical core in a manufacturing plant, wound into a roll, and transported to a construction site.

  When making a reinforcing bar unit wound in a roll shape, it is placed on a floor foundation where concrete is not placed, and when the outer end side is fixed, push the winding core side in a state where the outer end side is fixed. Deployed horizontally. Reinforcing bars are laid at predetermined intervals by tensioning the spacing lines. Rebar units are expanded in two sets so that rebar materials are orthogonal to each other. Intersecting reinforcing steel materials are bound by a binding member.

Japanese Patent Application Laid-Open No. 6-316986

  The reinforcing bar unit (roll-up type reinforcing bar bundle) described in Patent Document 1 can be rationally deployed in the work of laying reinforcement on the floor. However, the reinforcing bar unit (roll-up type reinforcing bar bundle) described in Patent Document 1 can not be easily arranged on the wall by developing along the wall foundation.

  That is, the reinforcing bar unit wound in a roll shape and placed on the floor or floor base near the wall base, when the outer end side is simply pulled up, the winding core side expands in the direction away from the wall base, and the spacing maintenance line A large number of reinforcing bars connected to the will rise in the diagonal direction. Raising a large number of reinforcing bars in a diagonal direction requires a greater lift than raising them directly above.

  Furthermore, as the outer end of the rolled rebar unit is pulled up to arrange the reinforcement on the wall foundation, the lower rebar material suspended from the rebar material on the upper end side increases, and all rebar materials In the arranged state, the loads of all the lower reinforcements act on the reinforcement on the upper end side. Therefore, in order to deploy the rolled rebar unit along the wall foundation, a large-scale device has to be used, which is a troublesome operation.

  The present invention provides a wall reinforcing bar arranging method that enables wall reinforcing bars to be easily arranged, a reinforcement assisting device and a lifting equipment for reinforcing bars used in the wall reinforcing bar arranging method. With the goal.

The reinforcement method of wall rebar according to the present invention is
A rebar unit comprising a plurality of rebar members arranged so that the longitudinal directions are parallel to each other and spacing maintaining lines connecting adjacent rebar members at a predetermined distance are used as a wall foundation of a construction site This is a method of arranging wall reinforcing bars to be wall reinforcing bars along
Lifting assist device installation process of installing a lifting assist device of reinforcing material near the wall base of the construction site,
Lifting device deployment process for deploying a lifting device equipped with a lifting unit at a construction site;
A rebar unit installation step of installing the rebar unit in the lifting assist device in a state of being wound into a roll;
A state in which the reinforcing bar unit is wound by hooking the reinforcing bar material on the outer end side of the reinforcing bar unit to the elevating part of the lifting device and applying the winding core side of the reinforcing bar unit to the lifting assist device By relatively raising the elevating part of the lifting device, the outer end side of the reinforcing bar unit is relatively lifted from the lifting assist device along the wall foundation, and the reinforcing bar Rebar unit expansion process which rotates and expands the unit in the circumferential direction,
including.

The reinforcement method of wall rebar according to the present invention is:
In the reinforcing bar unit developing step, the two reinforcing bars on the outer end side of the reinforcing bar unit wound in a roll may be hooked to the elevating part.

The reinforcement method of wall rebar according to the present invention is:
Installing a hook on an existing rebar material already laid on the wall foundation;
Locking the reinforcing bar material relatively lifted from the lifting assist device at the outer end side of the reinforcing bar unit to the hook;
May be included.

The lifting assist device for reinforcing bars according to the present invention is
It is a lifting assist device for reinforcing material used in the method of arranging wall rebar according to the present invention,
The accommodation part which installs the above-mentioned reinforcement material is provided so that the winding core side of the above-mentioned reinforcement unit wound in the shape of a roll may rotate in the circumferential direction easily.

In the lifting assist device for reinforcing bars according to the present invention,
The accommodating portion includes a plurality of rollers arranged in parallel.

The lifting load assisting device for rebar according to the present invention,
You may provide a pair of end board arrange | positioned on the outer side of each end of the said accommodating part so that rocking | fluctuation is possible.

The lifting apparatus according to the present invention is
It is a lifting apparatus provided with the raising / lowering part used in the method of arranging wall reinforcing bars according to the present invention,
The elevating unit includes a fork on which the reinforcing material is to be placed, and a retaining member which is attachable to and detachable from an end of the fork.

The lifting apparatus according to the present invention is
It is a lifting apparatus provided with the raising / lowering part used in the method of arranging wall reinforcing bars according to the present invention,
The elevating unit includes a groove-shaped mounting portion for mounting the reinforcing material over the entire length or substantially the entire length, and a cutout portion for extending the spacing holding line from the inside of the mounting portion to the outside of the mounting portion. And.

  According to the present invention, it is possible to provide a method of arranging wall reinforcing bars, a lifting aid assisting device for reinforcing bars, and a lifting apparatus capable of easily arranging wall reinforcing bars.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows one Embodiment of the lifting assistance apparatus of the reinforcement material of this invention. It is a perspective view which shows an example of the reinforcing bar unit used in the rebar arrangement method of the wall rebar of this invention. It is a perspective view showing a wall foundation which is arranged by a reinforcing bar unit in a method of arranging a wall rebar of the present invention. It is an embodiment of the rebar arrangement method of the wall rebar of the present invention, and is a perspective view showing the first process. It is a perspective view which is one embodiment of the rebar arrangement method of the wall rebar of this invention, and shows an intermediate process. It is one embodiment of the wall reinforcing bar arrangement method of the present invention, and is a perspective view showing the last process. FIG. 6 is a perspective view showing a reinforcing bar unit arranged on a wall foundation according to an embodiment of a method for arranging wall reinforcing bars of the present invention. It is a perspective view which shows the principal part of one modification of the lifting apparatus of this invention. It is a perspective view which shows other embodiment of the lifting apparatus of this invention. It is a perspective view which shows other embodiment of the lifting apparatus of this invention. It is a perspective view which shows the middle process which is arranging the reinforcement unit by the lifting apparatus of other embodiment of this invention. It is one Embodiment of the fastener used in the rebar method of wall rebar of this invention, Comprising: It is a perspective view which shows the state which installed the fastener on the existing rebar material. It is one embodiment of the fastener used in the rebar method of wall rebar of the present invention, and is a perspective view showing the state where the rebar material of the rebar unit is hooked on the fastener. It is a perspective view which shows other embodiment of the fastener used in the rebar arrangement method of the wall rebar of this invention.

  One embodiment of a method of arranging reinforcing bars of the present invention, a lifting aid for reinforcing bars and a lifting apparatus will be described with reference to FIGS. 1 to 7. FIG. 1 is a perspective view showing an embodiment of a lifting aid for reinforcing steel of the present invention. FIG. 2 is a perspective view showing an example of a reinforcing bar unit used in the method of arranging wall reinforcing bars of the present invention. FIG. 3 is a perspective view showing a wall foundation arranged by the reinforcing bar unit in the wall reinforcing bar arranging method of the present invention. FIG. 4 is a perspective view showing an embodiment of a method of arranging reinforcing bars of the present invention, which is the first step. FIG. 5 is a perspective view showing an intermediate step of one embodiment of a method of arranging wall reinforcing bars of the present invention. FIG. 6 is a perspective view showing an embodiment of a method for arranging wall reinforcing bars of the present invention and the final steps. FIG. 7 is a perspective view showing a reinforcing bar unit arranged on a wall foundation according to an embodiment of the method of arranging wall reinforcing bars of the present invention.

  According to the method of arranging reinforcing bars of the present invention, a reinforcing bar unit 1 as shown in FIG. 2 is made to be a wall reinforcing along a wall foundation 2 as shown in FIG. As shown in FIG. 2, the reinforcing bar unit 1 has a plurality of reinforcing bars 11 arranged such that the longitudinal directions are parallel to each other, and a spacing maintenance line 12 connecting adjacent reinforcing bars 11 at a predetermined interval. And have.

  The reinforcing bar 11 is formed with a large number of nodes (not shown). In the state in which the reinforcing bar unit 1 is developed along the wall foundation 2, the spacing maintaining line 12 has a strength that does not cut even when the load (tensile force) of a large number of reinforcing bars 11 is applied. The reinforcing bar unit 1 is wound in a roll at a manufacturing plant with a spiral reinforcing bar, a cylindrical frame or the like as a core material. The rebar unit 1 wound in a roll is conveyed to the construction site.

  As shown in FIG. 3, in the wall base 2, a large number of longitudinal rebars (existing longitudinal bars) 21 and a plurality of lateral rebars (existing transverse bars) 22 are arranged. It is done. The existing longitudinal bars 21 are longitudinally arranged between the ceiling and the floor (not numbered together). The existing horizontal bars 22 are bridged over a large number of existing vertical bars 21 near the ceiling. The existing vertical bars 21 and the existing horizontal bars 22 are bound by a binding line (not shown). A large number of nodes (not shown) are also formed on the existing vertical bars 21 and the existing horizontal bars 22. The existing longitudinal streaks 21 and the existing horizontal streaks 22 are engaged with each other so as not to be misaligned.

  As illustrated, in the case where the construction site is underground, the back side of the existing vertical bars 21 and the existing horizontal bars 22 is a temporary wall (e.g., a retaining wall) 23 in which the soil is impregnated with cement milk and solidified. Is being built. In the description of the present specification and the claims, the wall including the existing rebar members 21 and 22 disposed on the front side of the temporary wall 23 is referred to as “the wall foundation 2”.

  As shown in FIG. 4, on the floor near the wall base 2 of the construction site, a lifting assist device 3 for a plurality of reinforcing bars (3 in the drawing) is installed, and at least one lifting device is Be deployed. The lifting assistance device 3 may be installed on the floor foundation on which concrete is not placed, and the lifting equipment may be deployed. However, in this embodiment, a floor will be described. The reinforcing bar unit 1 wound in a roll is installed on the lifting assist device 3.

  A forklift 4 is used as a lifting device. As shown in FIGS. 4 to 6, the forklift 4 includes a mast 41, an elevating unit 42, and the like. The mast 41 is in a vertical posture, and has a role of raising and lowering the elevation unit 42. The elevator unit 42 includes a horizontally oriented fork (nail) 421 that is elevated and lowered by the mast 41. At the tip of the fork 421, the reinforcing bar 11 on the outer end side of the rolled reinforcing bar unit 1 is hooked in two places.

  As shown in FIG. 1, the lifting aid device 3 includes a pair of end plates 31 arranged at intervals, and a housing portion 32 provided between the both end plates 31. The housing portion 32 includes a plurality of rods 321 and a plurality of rollers 322. The end plate 31 is a rod-like member formed in an arc shape. The end plate 31 is placed on the floor so that the bulging outer side can swing. The end plate 31 is formed with a plurality of small holes (not shown) in two rows of outside and inside with different radiuses of curvature. The outer small holes are formed less unevenly with a wide pitch. The inner small holes are often formed with a uniform and narrow pitch.

  Each end of the rod 321 passes through any of the small holes. That is, the rods 321 are bridged in parallel on the pair of end plates 31. An external thread is formed at least at the tip of the rod 321. The tip of the rod 321 protrudes from each end plate 31 and a cap nut 323 is tightened. At each end of each rod 321 which is bridged in the small hole on the outer peripheral side of the end plate 31, a collar (not shown) is formed which contacts the opposite surface of the end plate 31. The opposing surface of the end plate 31 abuts on the ridge portion of the rod 321, and the cap nut 323 is tightened, whereby the distance between the pair of end plates 31 is maintained slightly longer than the length of the roller 322.

  The rollers 322 are externally fitted with the respective rods 321 extended in the small holes on the inner peripheral side. That is, the rod 321 penetrates the inside of the roller 322. The plurality of rollers 322 are arranged in parallel and form a wedge shape as a whole. The roller 322 is slightly shorter than the distance between the pair of end plates 31 and can be smoothly rotated in the circumferential direction.

  Here, with reference to FIGS. 4 to 7, a method of arranging wall reinforcing bars will be described. As shown in FIG. 4, the lifting assist device 3 is installed on the floor near the wall base 2 of the construction site (lift assisting device installation step). The three lifting assist devices 3 are arranged in series along the foundation wall so that the rollers 322 are parallel to the wall foundation 2.

  A forklift 4 is disposed at the construction site (lifting device deployment step). The forklift 4 is stopped at a retracted position so as not to overlap with a line connecting the lifting rollers 322 in which the forks 421 are arranged. It should be noted that either the lifting assist device installation step or the lifting device deployment step may be the first step, and the other may be the later step.

  Next, the reinforcing bar unit 1 wound in a roll shape is installed on the roller 322 which is the housing portion 32 of the lifting assist device 3 (rebar unit installation step). The reinforcing bar unit installation process may be a process before the lifting device installation process. The fork 421 of the forklift 4 is lowered to the position below the mast 41. However, the fork 421 of the forklift 4 is located slightly above the top surface of the rebar unit 1 installed.

  The rolled rebar unit 1 is oriented parallel or substantially parallel to the wall substrate 2. The reinforcing material 11 on the outer end side of the rolled rebar unit 1 is parallel or almost parallel to the wall foundation 2. Since the reinforcing bars 11 on the lower side of the outer periphery of the reinforcing bar unit 1 are in a bundled state, they do not enter between the rollers 322 and the rollers 322, and are in line contact or point contact.

  As shown in FIG. 4, the forklift 4 advances so that the tip of the fork 421 is positioned above the installed reinforcing bar unit 1. In the case of shifting to the lifting device deployment step after the reinforcing bar unit installation step, the tip end portion of the fork 421 may be positioned above the reinforcing bar unit 1 installed in the lifting device deployment step.

  Next, the operator slightly raises the two reinforcing bars 11 on the outer end side of the reinforcing bar unit 1 so as to slightly lift them, and hooks them to the tip of the fork 421 of the forklift 4. The fork 421 of the forklift 4 is located below the mast 41 of the forklift 4. Therefore, the worker can latch on the fork 421 only by slightly lifting the two reinforcing bars 11. The outermost rebar 11 is hooked to the tip of the fork 421 so that it can be raised from the tip of the fork 421 without being disturbed by the second rebar 11 from the outermost end.

  As shown in FIG. 5, when the fork 421 of the forklift 4 rises, the outermost rebar member 11 and the second rebar member 11 from the outermost end are lifted upward, and two of the outer end side The reinforcing bar 11 on the winding core side connected to the reinforcing bar 11 by the spacing holding line 12 is lifted. That is, the reinforcing bar unit 1 wound in a roll shape is gradually developed along the wall foundation 2 (rebar unit expanding step).

  In the reinforcing bar unit expansion process, when the reinforcing bar 11 wound on the outer end side of the reinforcing bar unit 1 is pulled up without the reinforcing bar unit 1 wound in a roll shape being installed in the accommodation portion 32 of the lifting assist device 3, winding of the reinforcing bar unit 1 Since it becomes difficult for the core side to rotate in the circumferential direction, a large tensile force acts on the spacing holding line in the state in which the reinforcing bars are connected. Therefore, the reinforcing bar unit 1 has a tensile strength of the spacing maintaining line 12 greater than when simply downward load is applied by a plurality of reinforcing bars 11, or is provided with a large number of spacing maintaining lines 12. Thus, the wall rebar can be deployed along the wall in such a way that the spacing line 12 does not break.

  However, in the reinforcing bar unit developing step, the winding core side of the reinforcing bar unit 1 wound in a roll shape is rolled in a roll shape because it is placed in the bowl-shaped housing portion 32 and hits the lifting assist device 3 It rotates in the circumferential direction while maintaining the state. At this time, the roller 322 provided in the housing portion 32 of the lifting assist device 3 is rotated. The reinforcing member 11 of the reinforcing rod unit 1 which rotates in the circumferential direction does not generate a large frictional force due to line contact or point contact with the roller 322.

  However, when the rebar member 11 of the rebar unit 1 is lifted, the winding core sways like a pendulum with a short period. Due to this swing, a tensile force tends to act on the spacing line 12. However, the lifting assist device 3 is installed on the floor portion at the outer peripheral side of the end plate 31 formed in an arc shape, and can be swung. Even if a tensile force is generated in the spacing wire 12, the tension on the spacing wire 12 is relaxed by the end plate 31 becoming slightly floated.

  From these things, when the rebar member 11 at the outermost end is pulled up and the rebar unit 1 is developed, a strong tensile force does not act on the spacing maintaining line 12. Therefore, the reinforcing bar unit 1 wound in a roll shape is smoothly deployed by the elevation of the fork 421 of the forklift 4.

  As shown in FIG. 6, when the fork 421 of the forklift 4 ascends to the upper part of the mast 41 of the forklift 4, the outermost rebar 11 anchored at the tip of the fork 421 is distributed to the wall foundation 2 Along the existing horizontal bar 22. The rebar 11 at the innermost end on the winding core side approaches near the floor. Since adjacent reinforcing steel members 11 are connected by the spacing line 12, the reinforcing steel unit 1 in a completely developed state is along the wall foundation 2 lower than the existing horizontal rebar 22.

  The outermost rebar 11 is raised up along the lowermost existing horizontal rebar 22 while the second rebar 11 from the outermost end is hooked to the tip of the forklift 4. Since the second reinforcing material 11 from the outermost end is hooked to the tip of the forklift 4, the load of the lower reinforcing material 11 being deployed is suspended from the tip of the forklift 4 . Therefore, the erected outermost end reinforcing material 11 is not pulled by the lower reinforcing material 11, and is bound to the existing horizontal reinforcement 22 at a plurality of locations by a binding line (not shown).

  After the outermost rebar 11 is bound to the existing cross bar 22 by the binding line, the forklift 4 retracts. Each reinforcing bar material 11 of the reinforcing bar unit 1 in a state of being developed along the wall foundation 2 is bound by the existing longitudinal bars 21 and a binding line.

  As shown in FIG. 7, thereby, the existing longitudinal bars 21 and the existing horizontal bars 22 and the reinforcing bars 11 in the horizontal direction of the reinforcing bar unit 1 are arranged on the entire surface of the wall base 2. Work to arrange is finished. After that, a formwork (not shown) is installed so as to cover the existing rebar members 21 and 22 and the rebar member 11 of the rebar unit 1 arranged, and concrete is cast to construct a reinforced concrete wall. Be done.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the structure as described in said embodiment, The thing considered in the range of the matter described in the claim is considered. The embodiments and modifications of the invention are also included. Further, various modifications and combinations of the above embodiments may be made without departing from the scope of the present invention.

  In the above embodiment, the reinforcing material 11 at the outer end side of the reinforcing bar unit 1 wound around the fork 421 of the forklift 4 in a roll shape is latched. As shown in FIG. 8, the elevating part 42 of the forklift 4 may be provided with a block-like retaining member 422 attachable to and detachable from the tip of the fork 421. Since the fork 421 of the forklift 4 is made of steel, the retaining member 422 is, for example, a block made of a magnet. The magnet holding member 422 can be easily attached to and detached from the fork 421.

  The block-like retaining member 422 may have a tapered surface on one end side and an upright surface on the other end side. By attaching the reinforcing material 11 to the fork 421 along the tapered surface, the reinforcing material 11 can be hooked to the fork 421 by attaching the tapered surface to the fork 421 so that the tapered surface faces the tip side of the fork 421.

  In addition, the reinforcing bar 11 held by the fork 421 contacts the upright surface of the retaining member 422, so that the fork can be moved to the tip while the fork 421 is moving up, even if the two reinforcing bars 11 move to the tip side. It is possible not to drop out of 421. It is preferable to make the two reinforcing bars 11 more proximal than the tip end of the fork 421 to which the retaining member 422 is attached. However, the two reinforcing bars 11 may be hooked to the fork 421 such that the hooking member 422 is interposed therebetween.

  However, the retaining member 422 having a tapered surface may be attached with the tapered surface facing the proximal side and the upright surface facing outward. Further, the retaining member 422 may have a rectangular parallelepiped shape without a tapered surface. In any retaining member 422, the reinforcing bar 11 can be prevented from falling off the fork 421.

  In the above embodiment, the lifting device is the forklift 4. However, the lifting device may be a small indoor crane 40 as shown in FIGS. 9 to 11. FIG. 9 is a perspective view showing another embodiment of the lifting apparatus of the present invention. FIG. 10 is a perspective view showing another embodiment of the lifting apparatus of the present invention. FIG. 11 is a perspective view showing an intermediate process in which the reinforcing bar unit 1 is arranged by the lifting device according to another embodiment of the present invention.

  As shown in FIGS. 9 to 11, the crane 40 used as a lifting device moves up and down along the elevator unit 42 on which the reinforcing bar 11 of the reinforcing bar unit 1 is placed, the mast 43 in the vertical posture, and the mast 43 An arm 44 protruding forward, a hook 45 provided at the tip of the arm 44, and a wire rope 46 hooked to the hook 45 and suspending the elevating unit 42 in a horizontal posture are provided.

  The elevating part 42 is shaped like a deformed H-shaped steel having a ridge, and mounts the two reinforcing members 11 on the outer end side of the rebar unit 1 wound in a roll shape over the entire length or substantially the entire length A mounting portion 425 and notches 426 formed at a plurality of locations of the ridges are provided. The two reinforcing bars 11 on the outer end side of the reinforcing bar unit 1 placed on the mounting portion 425 do not fall off due to the ridges. The notched portion 426 extends the spacing maintaining line 12 connecting the adjacent reinforcing material 11 from the inside of the mounting portion 425 to the outside of the mounting portion 425. Therefore, the distance between the notches 426 is the same as the distance between the plurality of distance holding lines 12.

  Here, a method of arranging wall reinforcing bars using a crane 40 provided with such a lifting unit 42 will be described. In the lifting assist device deployment step, the elevation unit 42 is installed on the floor near the wall foundation 2 which is the construction site. The lifting assistance device 3 is installed on the floor portion of the construction site in the lifting assistance device installation process as described in the above-described embodiment.

  In the reinforcing bar unit installation step as described in the above embodiment, the reinforcing bar unit 1 wound in a roll shape is installed in the housing portion 32 of the lifting assist device 3. The two reinforcing bars 11 on the outer end side of the reinforcing bar unit 1 are placed on the mounting portion 425 of the elevating unit 42. The spacing line 12 connecting the adjacent reinforcing steel members 11 extends from the inside of the mounting portion 425 to the outside of the mounting portion 425 at the notch portion 426.

  The mounting portion 425 on which the reinforcing material 11 is placed is lifted by the elevation of the arm 44, whereby the reinforcing bar unit 1 installed in the housing portion 32 is expanded (rebar unit expanding step). At this time, as described in the above embodiment, the winding core side of the rebar unit 1 is installed in the bowl-shaped housing portion 32, and thus the lifting support device 3 is maintained, so the rolled state is maintained. While rotating in the circumferential direction, a large tensile force does not act on the spacing line 12 connecting the plurality of reinforcing bars 11.

  In the reinforcing bar unit 1 developed along the wall foundation 2, each reinforcing bar material 11 is bound by the existing longitudinal bars 21 and a binding line (not shown). As a result, the existing vertical bars 21 and the existing horizontal bars 22 and the reinforcing bars 11 in the horizontal direction of the reinforcing bar unit 1 are arranged on the entire surface of the wall base 2, and the work of arranging the wall bars on the wall base 2 is completed. . After that, a formwork (not shown) is installed so as to cover the existing rebar members 21 and 22 and the rebar member 11 of the rebar unit 1 arranged, and concrete is cast to construct a reinforced concrete wall. Be done.

  In the above-described embodiment, the reinforcing bar 11 at the outermost end of the expanded reinforcing bar unit 1 is bound to the existing cross bar 22 by a binding line. In the pre-process of tying the outermost rebar member 11 and the existing cross bar 22 by the binding line, a hook 51 as shown in FIGS. 12 and 13 may be used.

  FIG. 12 is a perspective view showing an embodiment of the hooking tool 51 used in the method of arranging wall reinforcing bars according to the present invention, in which the hooking tool 51 is installed on the existing crossbar 22 which is a reinforcing bar material. is there. FIG. 13 is a perspective view showing an embodiment of the hooking tool 51 used in the method of arranging wall reinforcing bars according to the present invention, in which the hooking bar 51 is engaged with the reinforcing bar 11 of the reinforcing bar unit 1. is there.

  The hook 51 includes first and second U-bolts 511a and 511b, first and second connection plates 512a and 512b, four nuts 513, and one support rod 514. ing. Male threads are formed at both ends of the two U-bolts 511a and 511b. Each connecting plate 512a, 512b has a rectangular shape, and a through hole through which the tip of the U-bolt 511a, 511b passes is formed near the end. The support rod 514 hooks the reinforcement 11 at the outermost end of the reinforcement unit 1. A large number of nodes similar to the reinforcing material 11 are formed on the support rod 514 at equal intervals.

  Here, a method of installing such a hook 51 on the existing longitudinal bar 21 will be described. The turn sides of the two U-bolts 511 a and 511 b are horizontally oriented so as to sandwich the lower end portion of the existing vertical bar 21. The tip portions of the two U-bolts 511a and 511b are arranged in the same direction, and are vertically disposed to sandwich the support bar 514. The support rods 514 project from the temporary wall 23 in the vertical direction toward the near side.

  The two connection plates 512a and 512b are vertically applied to the support rods 514. One end of each of the first and second U-bolts 511a and 511b penetrates through each through hole of the first connection plate 512a. The other ends of the first and second U-bolts 511a and 511b pass through the through holes of the second connection plate 512b. A nut 513 is fastened to the tip of each of the first and second U-bolts 511a and 511b. Thus, the support rods 514 are fixed (installed) at the existing longitudinal bars 21 at a plurality of locations. The node of the support rod 514 and the node of the longitudinal muscle 21 are in a state of meshing.

  The reinforcing bar 11 at the outermost end of the reinforcing bar unit 1 raised in the reinforcing bar unit expanding step is hooked on the support rods 514 in the state of projecting to the front side from the existing longitudinal bars 21. As a result, the expanded reinforcing bar unit 1 is suspended by the supporting bar 514, and the lifting bar 42 of the forklift 4 or the crane 40 retains the reinforcing bar hooked to the supporting bar 514 even if it is retracted from the vicinity of the wall base 2. The material 11 and the existing cross bar 22 can be bound by a binding line. The reinforcing bar 11 and the support bar 514 which are hooked to the support bar 514 may also be bound by a binding wire.

  The hook may be configured as shown in FIG. FIG. 14 is a perspective view showing another embodiment (modification) of the hook 52 used in the method of arranging wall reinforcing bars of the present invention.

  The hooking tool 52 of the modified example is configured like a C-shaped hook and has a pair of U-shaped turn portions 521a and 521b and an I-shaped straight portion 522, and both of the turn portions 521a and 521b. The inner side faces each other, and the opposing end portions of the two turn portions 521 a and 521 b are integrally connected by the straight portion 522. The inner dimensions of each of the turn portions 521a and 521b are slightly larger than the outer diameters of the existing transverse bars 22 and the reinforcing bars 11. The length of the straight portion 522 is equal to or substantially the same as the distance between the reinforcing bars 11.

  The hooking tool 52 of this modification is provided in the reinforcing bar unit expanding step in a state in which one of the turn portions 521a is hooked (installed) on the existing cross bar 22, and the other turn portion 521b is suspended. The respective end portions of both the turn portions 521 a and 521 b of the hooking tool 52 are on the front side of the existing horizontal rebar 22. After the rebar member 11 on the outer end side of the rebar unit 1 wound in a roll shape ascends in the rebar unit expanding step, the outermost rebar member 11 is hooked to the other turn portion 521b of the hook 52 .

  As a result, the expanded reinforcing bar unit 1 is suspended by the hooking tool 52. Thereafter, the elevator 4 of the forklift 4 and the crane 40 retracts from the vicinity of the wall base 2, and the outermost rebar 11 of the suspended rebar unit 1 and the existing horizontal rebar 22 are bound by a binding line. Both the anchored outermost reinforcement 11 and the fastener 52 may be bound by a binding wire.

  The modified fastener 52 is not limited to the C-shaped hook, but may be configured as an S-shaped hook. The lower end of the S-shaped hook can be turned to the near side, so that the raised outermost end reinforcing material 11 can be easily hooked.

  In the above embodiment, the lifting aid device 3 includes the pair of arc-shaped end plates 31 and the accommodation portion 32 in which the plurality of rollers 322 are arranged in parallel. However, although not shown, the lifting aid device 3 may further include a removable or non-removable pedestal outside the lower end side of the arc-shaped end plate 31. The lift assisting device 3 provided with the pedestal does not swing in the state installed on the floor.

  Although not shown, the housing portion 32 of the lifting assist device 3 may be replaced with the roller 322, and may be provided with a large number of balls which are exposed and rotated only partially, or may be formed in a corrugated uneven shape. Alternatively, the housing portion 32 of the lifting assist device 3 may be in the form of a smooth surface with no or little frictional resistance. Alternatively, the housing portion 32 of the lifting assist device 3 may be shaped like a U-shaped groove or a V-shaped groove.

  Furthermore, the housing portion 32 of the lifting assist device 3 is provided so as to sandwich the rebar unit 1 in a roll shape with two blocks such as a prismatic column or a triangular prism as a lying posture. May be Alternatively, the block may be placed such that the reinforcing bar unit 1 in a rolled state is placed between it and the wall base 2.

  In the method of arranging wall reinforcing bars in the above embodiment, the lifting assist device 3 is installed on the floor, and the reinforcing bar 11 on the outer end side of the rolled reinforcing bar unit 1 is raised. However, the method of arranging wall reinforcing bars fixes a wide plate (not shown) on the forks 421 of the forklift 4 which is a lifting device, or the wire rope 46 of the crane 40 is a wide plate (not shown) ) May be suspended and installed on the lifting assist device 3 on this plate.

  In this case, the reinforcing bar unit 1 wound in a roll shape is installed in the housing portion 32 of the lifting assist device 3, and the reinforcing bar unit 1 is aligned with the existing horizontal bars 22 by raising the plate. Then, after the rebar member 11 on the outer end side of the rebar unit 1 is bound to the existing rebar member 11, the plate is lowered to expand the rebar unit 1. The lowering of the plate results in the relative lifting of the lifting portion 42 of the lifting device. In order to prevent the falling plate from shaking so as to be separated from the wall base 2, the plate may be provided with a lifting assist device 3 which is prevented from swinging.

  In the method of arranging wall reinforcing bars in the above embodiment, the construction site is underground. However, the present invention can also be practiced on the ground including upper floors not shown. When the construction site is on the ground, of course the temporary wall 23 is not constructed, and after many vertical bars 21 and many horizontal bars 22 arranged from the ceiling to the floor are arranged, A mold is installed so as to sandwich the longitudinal muscle 21 and the lateral muscle 22.

Summarizing the above, the wall reinforcing bar arranging method to which the present invention is applied is
A construction site of a reinforcing bar unit 1 provided with a plurality of reinforcing bars 11 arranged so that the longitudinal directions are parallel to each other and a spacing maintenance line 12 connecting the adjacent reinforcing bars 11 with a predetermined spacing Method of arranging wall reinforcing bars to be wall reinforcing bars along the wall base 2 of
A lifting assist device installation step of installing the lifting assist device 3 for the reinforcing bar 11 near the wall base 2 of the construction site,
A lifting device deployment step of deploying a lifting assistance device (forklift 4 or crane 40) having a lifting unit 42 at a construction site;
A reinforcing bar unit installation step of installing the reinforcing bar unit 1 in the lifting assist device 3 in a state of being wound in a roll shape;
The reinforcing bar material 11 on the outer end side of the reinforcing bar unit 1 is hooked to the elevating part 42 of the lifting assist device (forklift 4 or crane 40), and the winding core side of the reinforcing bar unit 1 is the lifting assist device Of the reinforcing bar unit 1 by relatively raising the elevation portion 42 of the lifting assist device (forklift 4 or crane 40) while maintaining the reinforcing bar unit 1 in a wound state by applying A reinforcing bar unit 1 developing step of relatively raising the outer end side from the lifting assist device 3 along the wall foundation 2 and rotating the reinforcing bar unit 1 in the circumferential direction to expand;
including.

  The reinforcement method of this wall rebar is developed by using the lifting assist device 3 and the lifting assist device (forklift 4 or crane 40) to develop the rebar unit 1 wound in a roll shape, and as a wall rebar It can be easily arranged. That is, the reinforcing bar unit 1 in a rolled state is installed in the lifting assist device 3, and the outer end side of the reinforcing bar unit 1 is relatively lifted by the lifting assist device (forklift 4 or crane 40) , Rebar unit 1 is rotated and expanded. The reinforcing bar unit 1 hits the lifting assist device 3 and rotates so that the reinforcing bar material 11 is relatively lifted in the upward direction. The spacing maintaining line 12 connecting the reinforcing bars 11 exerts a smaller tensile force than when the reinforcing bars 11 rise in an oblique direction, and even if it is not multiple spacing maintaining lines 12 or a large tensile force Even if the spacing line 12 can not stand, it can be deployed without being cut off.

The reinforcement method of wall rebar according to the present invention is:
In the reinforcing bar unit developing step, the two reinforcing bars 11 on the outer end side of the reinforcing bar unit 1 in a state of being wound in a roll shape are hooked to the elevation unit 42.

  In this wall reinforcing bar arranging method, the second reinforcing bar 11 from the outermost end is moved to the lifting and lowering section 42 at a relatively raised position by the two reinforcing bars 11 being hooked to the lifting and lowering section 42. The single reinforcing material 11 at the outermost end can be easily aligned with the existing reinforcing material (existing horizontal rebar 22) and tied while being retained.

The reinforcement method of wall rebar according to the present invention is:
Installing the hooking tools 51 and 52 on the existing rebar material (the existing cross bar 22) already laid on the wall base 2;
A step of hooking the reinforcing bar member 11 relatively lifted from the lifting assist device 3 at the outer end side of the reinforcing bar unit 1 to the hooking tools 51, 52;
including.

  The method of arranging the reinforcing bars of this wall is by hooking the reinforcing bar 11 relatively lifted from the lifting assist device 3 to the hooks 51 and 52 installed on the existing reinforcing bars (the existing horizontal bars 22) The raised reinforcing material 11 can be easily bound to the existing reinforcing material (existing lateral reinforcement 22).

The lifting assist device 3 for reinforcing bars according to the present invention is
A lifting aid 3 for reinforcing material used in the method of arranging wall reinforcing bars according to the present invention, which is:
The accommodation part 32 which installs the said reinforcement material 11 is provided so that the winding core side of the said reinforcement unit 1 rolled in roll shape may rotate to a circumferential direction easily.

  The lifting assist device 3 for reinforcing reinforcing material relatively raises the outer end side of the rebar unit 1 wound in a roll shape by providing the accommodation portion 32 in which the reinforcing bar unit 1 wound in a roll shape is installed. In this case, the accommodating portion 32 can easily rotate the winding core side of the reinforcing bar unit 1 so that a large tension can not be applied to the interval maintaining line 12 connecting the adjacent reinforcing bars 11.

In the lifting assist device 3 for reinforcing bars according to the present invention,
The housing portion 32 includes a plurality of rollers 322 arranged in parallel.

  A plurality of rollers 322 are arranged in parallel in the housing portion 32 and the reinforcing bar 11 wound in a roll shape smoothly rotates in the circumferential direction by rotating the circumferential direction. It can be enabled.

The lifting load assisting device 3 for reinforcing bars according to the present invention,
A pair of end plates 31 disposed on the outside of each end of the accommodating portion 32 is provided so as to be swingable.

  After the outer end side of the reinforcing bar unit 1 wound in a roll shape is installed in the accommodation portion 32, the lifting assist device 3 for reinforcing bar material is paired with the reinforcing bar unit 1 even if the reinforcing bar unit 1 shakes. By swinging the end plate 31 so as to be interlocked, it is possible to make it difficult for the spacing holding line 12 to be subjected to a tensile force.

The lifting device (forklift 4) according to the present invention is
It is a lifting apparatus (forklift truck 4) provided with the raising / lowering part 42 used in the method of arranging wall reinforcing bars according to the present invention,
The elevating unit 42 includes a fork 421 on which the reinforcing material 11 is placed, and a retaining member 422 attachable to and detachable from the tip of the fork 421.

  In this lifting apparatus (forklift truck 4), the reinforcing material 11 is placed in a direction orthogonal to the direction of the fork 421, but the reinforcing material 11 relatively lifted by the movement of the fork 421 moves toward the tip of the fork 421 Even so, by hitting the retaining member 422, it is possible to prevent it from falling off from the tip of the fork 421.

The lifting apparatus (crane 40) according to the present invention is
It is a lifting apparatus (crane 40) provided with the raising / lowering part 42 used in the method of arranging wall reinforcing bars according to the present invention,
The elevation unit 42 extends a groove-shaped placement portion 425 for placing the reinforcing bar 11 over the entire length or substantially the entire length, and extends the spacing holding line 12 from the inside of the placement portion 425 to the outside of the placement portion 425 And a notch 426 for coming out.

  In this lifting apparatus (crane 40), the mounting portion 425 having a ridge is relatively raised in a stable state by placing the reinforcing member 11 over the entire length or almost the entire length. It can be done. In this lifting device (crane 40), even if the mounting portion 425 has a grooved shape having a ridge, the gap holding line 12 can be held in the mounting portion 425 by being provided with a cutout portion 426 without the ridge. The reinforcing material 11 can be suspended from the mounting portion 425 so as not to be bent by the ridges of the mounting portion 425.

DESCRIPTION OF SYMBOLS 1 ... Reinforcement unit 11 ... Reinforcement material 12 ... Spacing line 2 ... Wall foundation 21 ... Existing reinforcement material (existing vertical bar)
22 ... existing rebar (existing horizontal bar)
3 Lifting auxiliary device 31 End plate 32 Housing part 322 Roller 4 Forklift (lifting device)
40 ... crane (lifting device)
42 Lifting portion 421 Fork 422 Retaining member 425 Mounting portion 426 Notch 51 Retaining tool 52 Retaining tool

Claims (8)

A rebar unit comprising a plurality of rebar members arranged so that the longitudinal directions are parallel to each other and spacing maintaining lines connecting adjacent rebar members at a predetermined distance are used as a wall foundation of a construction site This is a method of arranging wall reinforcing bars to be wall reinforcing bars along
Lifting assist device installation process of installing a lifting assist device of reinforcing material near the wall base of the construction site,
Lifting device deployment process for deploying a lifting device equipped with a lifting unit at a construction site;
A rebar unit installation step of installing the rebar unit in the lifting assist device in a state of being wound into a roll;
A state in which the reinforcing bar unit is wound by hooking the reinforcing bar material on the outer end side of the reinforcing bar unit to the elevating part of the lifting device and applying the winding core side of the reinforcing bar unit to the lifting assist device By relatively raising the elevating part of the lifting device, the outer end side of the reinforcing bar unit is relatively lifted from the lifting assist device along the wall foundation, and the reinforcing bar Rebar unit expansion process which rotates and expands the unit in the circumferential direction,
including,
Reinforcement method of wall rebar. In the reinforcing bar unit expanding step, the two reinforcing bars on the outer end side of the reinforcing bar unit wound in a roll shape are hooked to the elevating unit,
A method of arranging wall reinforcing bars according to claim 1. Installing a hook on an existing rebar material already laid on the wall foundation;
Locking the reinforcing bar material relatively lifted from the lifting assist device at the outer end side of the reinforcing bar unit to the hook;
including,
A method of arranging wall reinforcing bars according to claim 1 or 2. A lifting aid device for reinforcing material used in the method of arranging wall rebars according to any one of claims 1 to 3, comprising:
The container is provided with a storage portion for installing the reinforcing material so that the winding core side of the rebar unit wound in a roll shape can be easily rotated in the circumferential direction.
Reinforcement lifting equipment. The housing portion includes a plurality of rollers arranged in parallel.
The lifting-up assistance apparatus of the reinforcement material of Claim 4. And a pair of end plates disposed on the outside of each end of the receiving portion so as to be swingable.
The lifting assistance apparatus of the reinforcement material of Claim 4 or 5. A lifting apparatus comprising a lifting unit used in the method of arranging wall reinforcing bars according to any one of claims 1 to 3, comprising:
The elevating unit includes a fork on which the reinforcing material is placed, and a retaining member detachably attachable to a tip end of the fork.
Lifting device. A lifting apparatus comprising a lifting unit used in the method of arranging wall reinforcing bars according to any one of claims 1 to 3, comprising:
The elevating unit includes a groove-shaped mounting portion for mounting the reinforcing material over the entire length or substantially the entire length, and a cutout portion for extending the spacing holding line from the inside of the mounting portion to the outside of the mounting portion. Is equipped with
Lifting device.

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