JP5254686B2 - Rebar assembly jig - Google Patents

Description

  The present invention relates to a reinforcing bar assembling tool suitable for use in a reinforcing bar assembling method in a reinforcing method for a high structure.

  In order to seismically reinforce existing concrete piers, for example, according to Patent Document 1, at least a pair of longitudinal grooves are formed on opposite surfaces of the existing piers, and both ends of intermediate strip reinforcing bars inserted into through holes formed between the longitudinal grooves are , Fixed to the supporting steel material fixed in the longitudinal groove, multiple reinforcing bar reinforcing bars are arranged on the surface of the existing pier, and several reinforcing bar reinforcing bars are penetrated through the supporting steel material and existing from above the reinforcing axial steel bars A reinforcement structure is known that is wound around the outer periphery of a bridge pier and covered with a mortar coating layer of these reinforcing steel bars and supporting steel materials.

  By the way, as a construction location of a structure having a height of more than 25 m (hereinafter referred to as a high structure), there are many places in mountainous areas, mountains and valleys in coastal areas, and the construction conditions are severe. In the past, in order to seismically strengthen high structures, framework scaffolds were installed along the piers and were constructed using the RC winding method. In addition, it was necessary to lift the steel material with a large crane for assembling the reinforcing bars, and it was necessary to secure a large work yard.

In addition, rebar and formwork assembly work is usually performed using a large crane, but there are many cases where large heavy machinery such as cranes do not enter in mountains and coastal areas, so do not use cranes. There is a need for an efficient construction method.
In the past, rebar / formwork assembly and concrete placement have been carried out with, for example, about 5 m as one cycle. However, many steps are required by assembling and constructing a frame scaffold every cycle.

  In other words, when a seismic reinforcement of a high structure is performed, it takes a lot of days because the scaffold is installed in accordance with the concrete placement height.

  Here, according to Patent Document 2, an elevating scaffold is known, which is composed of one work table that moves up and down along a plurality of support columns, and is provided with a flexible connecting portion that can be bent on the floor plate of the work table. Yes.

Further, according to Patent Document 3, the apparatus main body is composed of four segments that are respectively placed on a scorpion so as to surround the support portion of the pier, and adjacent ones are connected and fixed to each other. A screw mechanism is provided at the tip, and the upper structure is pushed by this screw mechanism to press and fix the device body to the saddle. Each segment is provided with a support bar, and each support bar is electrically operated. 2. Description of the Related Art A suspension device for a bridge pier in which a winch is detachably supported is known.
JP 11-36230 A JP-A-7-197641 JP-A-9-302949

  However, construction work of gibber, axial rebar and strip rebar cannot be performed continuously on a framework scaffold for high structures, requiring a lot of work period. In addition, since it is difficult to secure a work yard at high-structure construction sites, development of a construction method that does not require a large crane has been sought.

  In other words, in a site such as a mountain or a valley, a crane may not be used for operations such as rebar assembly. Therefore, it is necessary to assemble the rebar by lifting it with a hoist. However, in order to suspend with a hoist, since the efficiency of the existing lifting method is low, it is necessary to improve the efficiency by a method that cooperates with, for example, the lifting scaffold of Patent Document 2 and the electric winch or the like of Patent Document 3, for example. .

  The object of the present invention is suitable for rebar assembly in the reinforcement method of high structures, and can set the axial rebars and strip rebars accurately in the design rebar spacing, and can continuously assemble the rebars. It is to provide a jig that can contribute to shortening.

  In order to solve the above problems, the invention described in claim 1 is directed to a feed screw, a stopper fixed to one end of the feed screw, an engagement member engaged with the screw on the feed screw, and the stopper. A plurality of idler members that loosely engage with the engaging member on the feed screw, a reinforcing bar holding portion that is provided on each of the engaging member and the idler member, and holds the reinforcing bars one by one; A link mechanism for sequentially connecting the loose members to the mating member, one end of the link of the link mechanism being coupled to the loose member, and arranged in parallel with the feed screw, the link A reinforcing bar assembling tool including a guide shaft loosely engaged with an intermediate portion of the steel plate is characterized.

  According to a second aspect of the present invention, there is provided a feed screw, a stopper fixed to one end portion of the feed screw, an engaging member engaged with the screw on the feed screw, and between the stopper and the engaging member. A plurality of idler members loosely mated on the feed screw, an engagement member and an idler member, respectively, and a reinforcing bar holding portion for holding one reinforcing bar at a time; And a link mechanism for sequentially connecting the loose members, and a rebar assembly jig formed by joining intermediate portions of the links of the link mechanism to the loose members.

  A third aspect of the present invention is the reinforcing bar assembling jig according to the second aspect, wherein the link is crossed and coupled to the loose member.

  According to a fourth aspect of the present invention, there is provided a feed screw, a stopper fixed to one end portion of the feed screw, an engagement member engaged with the screw on the feed screw, and between the stopper and the engagement member. And a link mechanism that is connected to the engagement member and extends to the opposite side of the engagement member, and the engagement mechanism. A rebar holding part that is provided on each of a plurality of links provided to extend on the opposite side of the link member to the loose member, the rebar holding part that holds rebars one by one, and the feed screw; A guide shaft that is arranged in parallel and loosely engages an intermediate portion of the link of the link mechanism, and connects the one end of the link of the link mechanism to the loose member, and the looseness of the link mechanism A plurality of parts provided to extend on the opposite side of the member Wherein the jig reinforcing bar assembly comprising said reinforcing bar holding portion at one end of the link.

  A fifth aspect of the present invention is the reinforcing bar assembling jig according to the fourth aspect, wherein the guide shaft is at least twice as long as the feed screw.

  The invention according to claim 6 is the reinforcing bar assembling tool according to claim 1 or 4, wherein a second loosening member that loosely engages with the guide shaft is provided at an intermediate portion of the link. Features.

  The invention according to claim 7 is the reinforcing bar assembling tool according to claim 1 or 4, wherein a second stopper for restricting movement of the link is provided at a tip portion of the guide shaft. It is characterized by.

  According to the present invention, in rebar assembly in the reinforcement method for high structures, axial rebars and strip rebars can be set with high accuracy in the design rebar spacing using jigs, and rebar assembly can be performed continuously, greatly shortening the work period. it can.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
FIG. 1 shows the construction of a gibber bar in the seismic reinforcement of a bridge pier as an example of the structure of a seismic reinforcement method for a high structure to which the present invention is applied. 1 is a concrete pier (high structure), 2 is a mast (post). 3 is a work platform (elevating scaffold), 4 is a ceiling rail, 5 is a hoist, and 11 is a dowel.

  As shown in the figure, a work that is an elevating scaffold that moves up and down along two masts 2 on the front and rear sides so as to surround the four front and rear four sides of a concrete pier (hereinafter simply referred to as a pier) 1 that is a high structure. A platform 3 is provided. The work platform 3 is equipped with an electric motor which is a drive source for the lifting operation. In addition, a plurality of hoists 5 each moving along a ceiling rail 4 parallel to the front and rear surfaces of the pier 1 are provided on the upper portion of the pier 1.

  The mast 2 may be one each before and after. Further, in the illustrated example, the work platform 3 is configured such that the work platform 3 that moves up and down along the front and rear masts 2 forms a pair. The ceiling rail 4 is disposed between the pier 1 and the mast 2. The ceiling rail 4 is fixed to the pier 1 or the mast 2. Further, the ceiling rail 4 is also constructed between both ends of the ceiling rail 4.

  The work platform 3 is loaded with the seismic reinforcement material using the hoist 5 provided on the ceiling rail 4. Here, the gibber muscle 11 is loaded and the work platform 3 is raised along the mast 2. Each time the vehicle is stopped, as shown in the figure, the gibber muscles 11 are assembled to the outer surface of the pier 1.

  FIG. 2 shows the construction of the next axial rebar / strand reinforcement, 12 is an axial rebar, and 13 and 14 are rebars.

  That is, the work platform 3 is loaded with the axial rebar 12 surrounding the pier 1 around the hoist 5 of the ceiling rail 4, the straight rebar 13, and the U-shaped rebar 14 in plan view. Each time the work platform 3 is raised or stopped, an axial rebar 12 is assembled around the pier 1 as shown in the figure, and a linear rebar 13 and a U-shaped band in a plan view with respect to the axial rebar 12. The reinforcing bar 14 is assembled.

  FIG. 3 shows the next formwork / concrete placement, in which 15 is the formwork and 16 is the cast concrete.

  That is, the work platform 3 is loaded with a form 15 using the hoist 5 of the ceiling rail 4, and each time the work platform 3 is raised or stopped, the form 15 surrounding the reinforcing bars assembled around the pier 1 is provided. Further, as shown in the figure, after the work platform 3 is raised and stopped, concrete is placed in the mold 15. In the illustrated example, for example, the mold removal from the first stage to the third stage is completed, and the cast concrete 16 appears, which is the fourth-stage mold 15 / concrete placing process.

FIG. 4 shows the next mold release.
As shown in the figure, for example, the mold 15 is removed from the mold after the casting of the fifth stage and the final sixth stage of the mold 15 and concrete.

Next, FIG. 5 shows an axial rebar assembling method in the axial rebar / band rebar construction shown in FIG. 2, and 20 is a rebar assembling jig.
As shown in the figure, the axial rebar 12 is held vertically with a space in the horizontal direction using a pair of upper and lower rebar assembly jigs 20 suspended by cables 6 fed from a pair of hoists 5 of the ceiling rail 4. It is assembled in the state.

  As shown in an enlarged view in FIG. 6, the reinforcing bar assembly jig 20 adjusts the intervals between the plurality of reinforcing bar holding parts 21 that hold a plurality of reinforcing bars one by one, and the plurality of reinforcing bar holding parts 21. An interval adjusting unit 30. The reinforcing bar holding portion 21 is of a type that is fixed to a pipe-shaped holding fitting 22 with a part cut away by tightening a bolt 23 through a reinforcing bar (axial reinforcing bar 12 in the drawing).

  The interval adjusting unit 30 includes a feed screw 31 whose axis is in the horizontal direction, an engagement member 32 using a nut that is screw-engaged with the feed screw 31, and a plurality of sheath members that are engaged with the feed screw 31. A member 33 (see FIG. 10) and links 34 and 35 for interlocking the plurality of loose members 33 with the engaging member 32 when the feed screw 31 is rotated. In the illustrated example, a set of two links 34 and a link 35 are rotatably connected between adjacent engaging members 32 and idler members 33, and fixed to one end portion of the feed screw 31 so as to be rotatable. A set of two links 34 is rotatably mounted between the plate 36 and the adjacent idler member 33.

Here, corresponding to the positions of the engaging member 32 and the loose member 33, the holding metal fitting 22 of the reinforcing bar holding portion 21 is attached to one side surface of the rotation connecting portion of the links 34 and 35.
As described above, the distance adjusting unit 30 moves with the engagement member 32 at the end opposite to the fixing plate 36 in conjunction with the relative rotation with the feed screw 31, thereby causing the links 34 and 35 to expand and contract therebetween. The interval between the loose members 33 is changed while maintaining an equal interval.

  FIG. 7A shows the reinforcing bar holding by the reinforcing bar assembly jig 20 described above. In the illustrated example, a link 35 and a fixing member 37 are provided in place of the fixing plate 36 described above. The fixing member 37 is rotatably assembled to one end portion of the feed screw 31, and the holding member 22 of the reinforcing bar holding portion 21 is provided on the fixing member 37. In the illustrated example, the axial reinforcing bars 12 are held by other reinforcing bar holding parts 21 except for the reinforcing bar holding part 21 of the fixing member 37.

FIG. 7B shows the contraction adjustment of the interval adjusting unit 30, and FIG. 7C shows the fixing to the pre-existing rebar 12 </ b> A in the contracted state and the reinforcement interval adjustment with arrows, As illustrated, the reinforcing bar holding part 21 of the fixing member 37 is fixed to the preceding existing reinforcing bar 12A at the end.
In this way, by fixing the reinforcing bar holding part 21 of the fixing member 37 to the preceding existing reinforcing bar 12A while shrinking and adjusting the interval adjusting part 30 to be compact, the rebar assembling jig 20 can be secured without being dangled.
Thereafter, as shown by the arrows, the distance adjusting unit 30 is stretched and adjusted.

  FIG. 7D shows the pressure welding of the axial rebar 12 to the lower preceding existing rebar 12B, and the axial rebar 12 held by a pair of upper and lower rebar assembling jigs 20 simplified by phantom lines. Are fastened and pressed against the preceding existing reinforcing bar 12B.

The assembly flow of the above axial rebar 12 is as follows.
1. The axial rebar 12 is attached to the rebar assembly jig 20.
2. Shrinkage adjustment of the space | interval adjustment part 30 of the rebar assembly jig 20 is carried out.
3. The reinforcing bar assembly jig 20 is suspended in the work platform 3 by a small crane (not shown).
4). The work platform 3 is raised to the work location.
5. The rebar assembly jig 20 is lifted by the hoist 5.
6). The reinforcing bar assembly jig 20 is fixed to the preceding existing reinforcing bar 12A at the end.
7. The distance adjusting unit 30 of the reinforcing bar assembling jig 20 is stretched and adjusted.
8). The axial rebar 12 of the reinforcing bar assembling tool 20 is tightly bonded and pressed to the lower preceding existing reinforcing bar 12B.

  Next, FIG. 8 shows a method for assembling the band rebar in the axial rebar / band rebar construction shown in FIG. 2. As shown in the figure, the band rebars 13 and 14 are fed out from a pair of hoists 5 of the ceiling rail 4. The rebar assembling jig 20 suspended by the cable 6 is assembled using a pair of left and right or a pair of front and rear in a state of being held horizontally with a space in the vertical direction.

  Here, FIG. 9A shows the arrangement of the rebars 13 and 14. The axial rebar 12 is surrounded around the pier 1 so that the parallel straight rebars 13 are opposed to each other as shown in the figure. A band rebar 14 having a U-shape in plan view is assembled.

FIG. 9B shows a holding position of the U-shaped band rebar 14 in plan view by the reinforcing bar assembly jig 20, and the U-shaped band rebar 14 in plan view has a reinforcing bar at the center as shown in the figure. It is held by the holding part 21, and both sides are held at the corresponding points P by the cable 6 fed out from the pair of hoists 5 of the ceiling rail 4.
In this way, both sides of the U-shaped band reinforcing bar 14 in plan view are lifted and assembled by the hoist 5 at a predetermined height.

  FIG. 9 (c) shows a holding position of the linear band reinforcing bar 13 by the reinforcing bar assembly jig 20, and the linear band reinforcing bar 13 is held by the reinforcing bar holding part 21 at both ends as shown in the figure. Is done.

  FIG. 10 is an enlarged view of the reinforcing bar assembly jig 20 shown in FIG. 8B. Basically, the feed screw 31 of the reinforcing bar assembly jig 20 is directed in the vertical direction, and the engaging member 32 holds the reinforcing bar. The holding metal fitting 22 of the part 21 is provided.

FIG. 11 shows a holding method different from the holding method of the reinforcing bar holding part 21 of FIG. 10, and FIG. 11 (a) shows a rotary reinforcing bar holding part 24. As shown in the figure, for example, a ring having a notch part. It is a rotary type that attaches and detaches the strip reinforcing bars 13 and 14 by combining the holding brackets 25 and 26 in the shape of a ring.
FIG. 11B shows a one-touch type reinforcing bar holding portion 27. As shown in the figure, for example, the hook-type holding bracket 28 is combined with a stopper pin 29 to attach and detach the band reinforcing bars 13 and 14. is there.

FIG. 12 shows a reinforcing bar take-in guide 40 on the work platform 3. As shown in the figure, on the floor surface of the work platform 3, a pair of left and right inclined guide plates 41 and a curved guide plate 42 continuous above the left and right inclined guide plates 41. A reinforcing bar take-in guide 40 is installed.
As shown in the figure, a pair of rebar assembling jigs 20 holding the rebar 13 is provided with a fixing plate 36 as shown in the figure on the side of the pier 1 on a predetermined floor surface on the work platform 3 by a small crane (not shown). Set down. At this time, the band reinforcing bar 13 held by the reinforcing bar assembling jig 20 is in the vicinity of the inclined guide plate 41 of the pair of reinforcing bar take-in guides 40.

  Then, after connecting the cable 6 fed from the pair of hoists 5 of the ceiling rail 4 to the pair of rebar assembly jigs 20 and then lifting the rebar assembly jig 20 by the hoists 5, the rebar assembly jig 20 holds the rebar assembly jig 20. The band reinforcing bar 13 is raised while being guided by the inclined guide plate 41 of the pair of reinforcing bar take-in guides 40 and is lifted by being hung to the pier 1 side by the curved guide plate 42 on the upper part thereof.

  FIG. 13 shows the fixing to the pre-existing reinforcing bars 13A and 14A by the reinforcing bar assembly jig 20. Except for the lowermost reinforcing bar holding part 21, the reinforcing bar holding part 13 (or the band reinforcing bar 14) is connected to the other reinforcing bar holding parts 21. ) Is held. Thereafter, as shown in the drawing, the lowermost reinforcing bar holding portion 21 is fixed to the lower preceding existing reinforcing bar 13A (or the preceding existing reinforcing bar 14A).

  The assembly flow of the band rebars 13 and 14 is the same as the assembly flow of the axial rebar 12 described above.

  According to the construction method described above, when the seismic reinforcement is performed on the pier 1 by the work platform 3, the construction of the gibber reinforcement 11, the axial reinforcement 12, and the strip reinforcements 13 and 14 can be continuously performed, so the construction period is greatly shortened. it can.

In the above description, the bridge pier is seismic strengthened, but the target of seismic strengthening may be a high structure such as a tower.
Further, the structure of the lifting scaffold is arbitrary, and it is needless to say that other specific detailed structures can be appropriately changed.

(Embodiment 1)
14 to 16 show the configuration of the first embodiment of the reinforcing bar assembly jig 20 to which the present invention is applied, when the axial reinforcing bar 12 is suspended and when the reinforcing bar is installed (when the maximum interval is adjusted). As in the embodiment, 6 is a cable, 20 is a reinforcing bar assembly jig, 21 is a reinforcing bar holding part, 31 is a feed screw, 32 is an engaging member, 33 is a loose member, 34 and 35 are links, and 39 is a stopper. , 51 is a guide shaft, 52 is a second idler member, and 53 is a second stopper.

That is, in the reinforcing bar assembly jig 20 of the first embodiment, as shown in the drawing, a stopper 39 by a nut is fixed to one end portion of the feed screw 31, and the feed screw 31 is placed between the stopper 39 and the engaging member 32. A plurality of (five in the illustrated example) idler members 33 are provided. Then, one end portions of the links 34 and 35 are connected to the loose member 33, and the guide shaft 51 arranged in parallel with the feed screw 31 is loosely engaged with the intermediate portion of the links 34 and 35.
Specifically, the engaging member 32 and the loose member 33 on the feed screw 31 are rotatably assembled between one end portions of the paired links 34 and 35, respectively, and the paired links 34 and 35 are also formed. The second idler member 52 made of a sheath material that engages on the guide shaft 51 is rotatably assembled between the intermediate portions of the intermediate shafts. Moreover, the 2nd stopper 53 by a nut is fixed to the both ends of the guide shaft 51, respectively.

  In the above, after fixing the reinforcing bar holding part 21 on the stopper 39 side at the left end of the figure to the preceding existing reinforcing bar 12A, the interval between the axial reinforcing bars 12 held by the other reinforcing bar holding parts 21 is set as in the above-described embodiment. Adjust the stretch. The adjustment is performed by rotating the engaging member 32 using a nut with a ratchet (not shown). In addition, after adjusting the space | interval of the axial direction reinforcing bar 12 on a work floor, you may lift with the cable 6 extended | stretched from a pair of hoist 5 of the ceiling rail 4 mentioned above.

FIGS. 17 to 19 show the time when the reinforcing bars 13 and 14 are suspended and when the reinforcing bars are installed (when the maximum interval is adjusted).
In this case, after fixing the reinforcing bar holding part 21 on the stopper 39 side at the lower end of the figure to the preceding existing reinforcing bar 13A (or the preceding existing reinforcing bar 14A), the band reinforcing bar 13 (or the band reinforcing bar 14 held by the other reinforcing bar holding part 21). ). The adjustment is performed by a ratchet. In addition, after performing the space | interval adjustment of the belt reinforcement 13 (14) on a work floor, you may lift.

  As described above, according to the reinforcing bar assembling jig 20 of the first embodiment, the guide shaft 51 arranged in parallel with the feed screw 31 is idled at the intermediate part of the links 34 and 35 having one end connected to the loose coupling member 33. As a result, the engaging member 32 at the end opposite to the stopper 39 moves in conjunction with the rotation of the feed screw 31 so that the expansion and contraction operation along the guide shaft 51 at the intermediate portion of the links 34 and 35 therebetween is performed. Along with this, the interval between the loose members 33 is changed while maintaining an equal interval.

  Therefore, in rebar assembly in the reinforcement method for high structures, the axial rebar 12 and the strip rebars 13 and 14 can be set to the designed rebar spacing with the jig 20 with high accuracy and the rebar assembly can be performed continuously. It can be shortened.

(Embodiment 2)
20 to 25 show the configuration of the second embodiment of the reinforcing bar assembly jig to which the present invention is applied, when the axial reinforcing bar is suspended and when the reinforcing bar is installed (when the maximum interval is adjusted). Similarly, 6 is a cable, 20 is a reinforcing bar assembly jig, 21 is a reinforcing bar holding part, 31 is a feed screw, 32 is an engaging member, 33 is a loose member, 34 and 35 are links, and 39 is a stopper. .

  That is, the reinforcing bar assembly jig 20 according to the second embodiment fixes a stopper 39 with a nut to one end of the feed screw 31 as shown in the drawing, and the feed screw 31 is placed between the stopper 39 and the engaging member 32. A plurality of (five in the illustrated example) idler members 33 are provided. Then, one end of the shorter link 34 is connected to the engaging member 32 and the loose member 33 on the stopper 39 side, and the middle portion of the longer link 35 is crossed with respect to the other loose member 33. Are connected. Therefore, it is a full type pantograph type link mechanism.

  In the above, similarly to the first embodiment described above, after the reinforcing bar holding part 21 on the left end stopper 39 side in FIGS. 20 and 21 is fixed to the preceding existing reinforcing bar 12A, the shaft held by the other reinforcing bar holding part 21 The distance between the directional reinforcing bars 12 is adjusted. The adjustment is performed by a ratchet. In addition, after performing the space | interval adjustment of the belt reinforcement 13 (14) on a work floor, you may lift.

FIG. 26 to FIG. 31 show the time when the reinforcing bars 13 and 14 are suspended and when the reinforcing bars are installed (when the maximum interval is adjusted).
In this case, after fixing the reinforcing bar holding part 21 on the stopper 39 side at the lower end of the figure to the preceding existing reinforcing bar 13A (or the preceding existing reinforcing bar 14A), the band reinforcing bar 13 (or the band reinforcing bar 14 held by the other reinforcing bar holding part 21). ). The adjustment is performed by a ratchet. In addition, after performing the space | interval adjustment of the belt reinforcement 13 (14) on a work floor, you may lift.

  As described above, according to the reinforcing bar assembling jig 20 of the second embodiment, since the longer link 35 intersects the loose coupling member 33 and the intermediate portion is joined, the stopper structure is used. Since the engaging member 32 at the end opposite to 39 moves in conjunction with the rotation of the feed screw 31, the gap between the loose members 33 is equalized with the expansion and contraction of the pantograph-type links 34 and 35 therebetween. It is changed while keeping the interval.

  Therefore, as in the first embodiment, in the rebar assembly in the reinforcement method for a high structure, the axial rebar 12 and the strip rebars 13 and 14 are accurately set to the designed rebar interval by the jig 20 so that the rebar assembly is continuous. Therefore, the construction period can be greatly shortened.

(Embodiment 3)
FIGS. 32 to 34 show the configuration of the third embodiment of the reinforcing bar assembly jig 20 to which the present invention is applied when the axial reinforcing bar is suspended and when the reinforcing bar is installed (when the maximum interval is adjusted). Similar to 1, 6 is a cable, 20 is a reinforcing bar assembly jig, 21 is a reinforcing bar holding part, 31 is a feed screw, 32 is an engaging member, 33 is a loose member, 34 and 35 are links, 39 is a stopper, 51 is A guide shaft, 52 is a second idler member, and 53 is a second stopper.

That is, in the reinforcing bar assembly jig 20 of the third embodiment, as shown in the drawing, a stopper 39 by a nut is fixed to one end portion of a feed screw 31 having a short length, and between the stopper 39 and the engaging member 32. One loose member 33 that engages on the feed screw 31 is provided. One end of a pair of links 34 and 35 is connected to the loose member 33 and the engaging member 32. Further, links 34 and 35 are provided on the opposite side of the engaging member 33 with respect to the engaging member 32.
Corresponding to the positions of the engaging member 32 and the loose member 33 described above, the holding metal fitting 22 of the reinforcing bar holding part 21 is provided on one side surface of the rotation connecting part of the links 34 and 35 corresponding to the position on the extension line. It is attached.

  Then, the guide shaft 51 disposed in parallel with the feed screw 31 is loosely engaged with the intermediate portion of the links 34 and 35. Specifically, the engaging member 32 and the idler member 33 on the feed screw 31 are rotatably assembled between one end portions of the pair of links 34 and 35 forming a pair on the stopper 39 side. Between the intermediate portions of the links 34 and 35 forming the pair, second loose members 52 made of a sheath material loosely mated on the guide shaft 51 are respectively assembled rotatably. Moreover, the 2nd stopper 53 by a nut is fixed to the both ends of the guide shaft 51, respectively. Here, in the illustrated example, the guide shaft 51 has a length five times or more that of the feed screw 31.

  In the above, after the reinforcing bar holding part 21 on the second stopper 53 side at the left end in the figure is fixed to the preceding existing reinforcing bar 12A, the axial reinforcing bar held by the other reinforcing bar holding part 21 is the same as in the first embodiment. 12 is extended and adjusted. The adjustment is performed by rotating the engaging member 32 using a nut with a ratchet (not shown).

That is, when the engaging member 32 moves on the feed screw 31, the links 34 and 35 to and from the idler member 33 expand and contract, and at the same time, the links 34 and 35 extended to the other extend and retract. Accordingly, the intervals of the reinforcing bar holding portions 21 of the rotation connecting portions of the links 34 and 35 corresponding to the positions of the engaging member 32 and the loosely engaging member 33 and corresponding to the positions on the extension line are kept constant. Be changed.
In addition, after adjusting the space | interval of the axial direction reinforcing bar 12 on a work floor, you may lift with the cable 6 extended | stretched from a pair of hoist 5 of the ceiling rail 4 mentioned above.

FIGS. 35 to 37 show the time when the rebars 13 and 14 are suspended and when the reinforcing bars are installed (when the maximum interval is adjusted).
In this case, after fixing the reinforcing bar holding part 21 on the stopper 39 side at the lower end of the figure to the preceding existing reinforcing bar 13A (or the preceding existing reinforcing bar 14A), the band reinforcing bar 13 (or the band reinforcing bar 14 held by the other reinforcing bar holding part 21). ). The adjustment is performed by a ratchet. In addition, after performing the space | interval adjustment of the belt reinforcement 13 (14) on a work floor, you may lift.

  As described above, according to the reinforcing bar assembling jig 20 of the third embodiment, one end is connected to the loose member 33 and the engagement member 32, and opposite to the loose member 33 with respect to the engagement member 32. Since the guide shaft 51 arranged in parallel with the feed screw 31 is engaged with the intermediate portion of the links 34 and 35 provided extending to the side, the engaging member 32 moves in conjunction with the rotation of the feed screw 31. The space | interval of the reinforcement holding | maintenance part 21 provided in the rotation connection part is changed with the expansion-contraction operation | movement along the guide shaft 51 of the intermediate part of link 34 * 35, maintaining an equal interval.

  Therefore, in rebar assembly in the reinforcement method for high structures, the axial rebar 12 and the strip rebars 13 and 14 can be set to the designed rebar spacing with the jig 20 with high accuracy and the rebar assembly can be performed continuously. It can be shortened.

  Next, FIG. 38 shows the feeding action by the short feed screw 31 of the third embodiment. As shown in the figure, the thread groove pitch of the feed screw 31 is 5 mm, and the entire links 34 and 35 are 250 mm in 10 rotations. When it shrinks, the reinforcing bar interval by the reinforcing bar holding part 51 provided at one end of the links 34 and 35 is reduced by 50 mm in 10 rotations.

On the other hand, FIG. 39 shows the feeding action by the long feed screw of the second embodiment. As shown in the drawing, the thread groove pitch of the feed screw 31 is 5 mm, and the entire links 34 and 35 are rotated 50 times. If it is reduced by 250 mm, the reinforcing bar interval by the reinforcing bar holding part 51 provided in the intermediate part of the links 34 and 35 is reduced by 50 mm at 50 rotations.
The same applies to the feeding action of the long feed screw of the first embodiment.

  In addition to the above-described embodiments, the shape and number of each component are arbitrary, and it is needless to say that specific detailed structures can be appropriately changed.

The structure of an example of the seismic reinforcement method of a high structure is shown, The schematic side view (a) and the same front view (b) which showed the construction of the gibber reinforcement in the seismic reinforcement of a bridge pier are shown. It is the schematic side view (a) and the same front view (b) which showed the axial direction reinforcement and the band reinforcement construction following the construction of FIG. It is the schematic side view (a) and the same front view (b) which showed the formwork and concrete placement following the construction of FIG. It is the schematic side view (a) and the same front view (b) which showed the mold form demolding following construction of FIG. It is the schematic side view (a) and the same front view (b) which showed the axial direction reinforcing bar assembly method in the axial direction reinforcing bar and belt reinforcing bar construction of FIG. It is an expansion perspective view of the jig part of FIG. FIG. 6A is a perspective view showing the reinforcement holding by the jig of FIG. 6A, and FIG. 6B is a diagram showing the shrinkage adjustment of the jig; FIG. c) It is the figure (d) which showed the press contact of the axial direction reinforcement to the preceding existing reinforcement. It is the schematic side view (a) and the same front view (b) which showed the band reinforcement assembly method in the axial direction reinforcing bar and band reinforcement construction of FIG. A plan view (a) showing the arrangement of the band reinforcing bars, a diagram (b) showing the U-shaped band reinforcing bar jig holding position in a plan view, and a diagram showing the holding position of the linear band reinforcing bar jig ( c). It is an expansion perspective view of the jig part of FIG.8 (b). It is the figure (a) and (b) which showed the holding system different from the holding system of FIG. It is the perspective view which showed the reinforcing bar taking-in guide on a raising / lowering scaffold. It is the perspective view which showed fixation to the prior | preceding existing reinforcement by the jig of FIG. 1 shows a configuration of a first embodiment of a reinforcing bar assembling tool to which the present invention is applied, and shows a front view (a) showing when an axial reinforcing bar is suspended and a time when the reinforcing bar is installed (when a maximum interval is adjusted). It is a front view (b). It is an enlarged view (a) (b) of the jig part for a reinforcing bar assembly of FIG. It is the vertical side view (a) and top view (b) of the jig part for reinforcing bar assembly of FIG. It is the front view (a) which showed the time of suspension of a belt reinforcement, and the front view (b) which showed the time of the reinforcement installation (at the time of maximum space adjustment). It is an enlarged view (a) (b) of the jig part for reinforcing bar assembly of FIG. It is the vertical side view (a) and top view (b) of the jig part for a reinforcing bar assembly of FIG. The structure of Embodiment 2 of the reinforcing bar assembling tool to which the present invention is applied is shown, and a front view (a) showing when the axial reinforcing bar is suspended and a time when the reinforcing bar is installed (when the maximum interval is adjusted) are shown. It is a front view (b). It is an enlarged view (a) (b) of the jig part for reinforcing bar assembly of FIG. It is the vertical side view (a) and top view (b) of the jig part for a reinforcing bar assembly of FIG. It is a perspective view of FIG.20 (b). It is the perspective view (a) (b) seen from the front and back direction of FIG.21 (b). It is an edge part enlarged view (a) (b) of FIG. It is the front view (a) which showed the time of suspension of a belt reinforcement, and the front view (b) which showed the time of the reinforcement installation (at the time of maximum space adjustment). It is an enlarged view (a) (b) of the jig part for a reinforcing bar assembly of FIG. It is the vertical side view (a) and top view (b) of the jig part for reinforcing bar assembly of FIG. FIG. 27 is a perspective view of FIG. It is the perspective view (a) (b) seen from the front and back direction of FIG.27 (b). It is an edge part enlarged view (a) (b) of FIG. The structure of Embodiment 3 of the reinforcing bar assembling tool to which the present invention is applied is shown, and a front view (a) showing when the axial reinforcing bar is suspended and the reinforcing bar installation (when the maximum interval is adjusted) are shown. It is a front view (b). It is an enlarged view (a) (b) of the jig part for reinforcing bar assembly of FIG. It is the vertical side view (a) and top view (b) of the jig part for a reinforcing bar assembly of FIG. It is the front view (a) which showed the time of suspension of a belt reinforcement, and the front view (b) which showed the time of the reinforcement installation (at the time of maximum space adjustment). It is an enlarged view (a) (b) of the jig part for reinforcing bar assembly of FIG. FIG. 37 is a longitudinal sectional side view (a) and a plan view (b) of the reinforcing bar assembling jig part of FIG. 36. It is the diagram which showed the feed effect | action by the short feed screw of Embodiment 3. FIG. It is the diagram which showed the feed effect | action by the long feed screw of Embodiment 2. FIG.

Explanation of symbols

1 Concrete pier (high structure)
2 Mast
3 Work platform (elevating scaffold)
4 Ceiling rail 5 Hoist 6 Cable 11 Givel bar 12 Axial reinforcing bar 12A Pre-existing reinforcing bar 12B Pre-existing reinforcing bar 13 Linear strip reinforcing bar 13A Pre-existing reinforcing bar 14 U-shaped strip reinforcing bar 14A Pre-existing reinforcing bar 15 Formwork 16 Concrete 20 Reinforcing bar assembly jig 21 Reinforcing bar holding part 22 Holding metal part 23 Bolt 24 Reinforcing bar holding part 25 Holding metal part 26 Retaining metal part 27 Reinforcing bar holding part 28 Holding metal part 29 Stopper pin 30 Spacing adjustment part 31 Feed screw 32 Engaging member 33 Free play Member 34 Link 35 Link 36 Fixing plate 37 Fixing member 39 Stopper 40 Reinforcing bar take-in guide 41 Inclined guide plate 42 Curved guide plate 51 Guide shaft 52 Second play member 53 Second stopper

Claims (7)

A lead screw;
A stopper fixed to one end of the feed screw;
An engagement member that engages with the screw on the feed screw;
A plurality of idler members loosely engaged on the feed screw between the stopper and the engaging member;
Reinforcing bar holding portions that are respectively provided on the engaging member and the loose member and hold the reinforcing bars one by one;
A link mechanism for sequentially connecting the loose members to the engaging members;
Connecting one end of the link of the link mechanism to the loose member;
A rebar assembly jig comprising a guide shaft arranged in parallel with the feed screw and loosely engaged with an intermediate portion of the link. A lead screw;
A stopper fixed to one end of the feed screw;
An engagement member that engages with the screw on the feed screw;
A plurality of idler members loosely engaged on the feed screw between the stopper and the engaging member;
Reinforcing bar holding portions that are respectively provided on the engaging member and the loose member and hold the reinforcing bars one by one;
A link mechanism for sequentially connecting the loose members to the engaging members;
A reinforcing bar assembling jig, wherein an intermediate portion of a link of the link mechanism is coupled to the loose member.   The reinforcing bar assembling jig according to claim 2, wherein the link is crossed and coupled to the loose member. A lead screw;
A stopper fixed to one end of the feed screw;
An engagement member that engages with the screw on the feed screw;
An idler member loosely engaged on the feed screw between the stopper and the engaging member;
A link mechanism that connects the engaging member to the engaging member and extends to the opposite side of the engaging member;
Reinforcing bar holding portions that are respectively provided on a plurality of links provided to extend on the side opposite to the loosening member of the link mechanism, and that hold the reinforcing bars one by one;
A guide shaft that is arranged in parallel with the feed screw and loosely engages an intermediate portion of the link of the link mechanism,
Connecting one end of the link of the link mechanism to the loose member;
A reinforcing bar assembling jig comprising the reinforcing bar holding portion at one end of a plurality of links provided to extend to the opposite side of the loose coupling member of the link mechanism.   The rebar assembly jig according to claim 4, wherein the guide shaft is at least twice as long as the feed screw.   The reinforcing bar assembling tool according to claim 1 or 4, further comprising a second loose member that loosely engages with the guide shaft at an intermediate portion of the link.   The reinforcing bar assembling jig according to claim 1 or 4, wherein a second stopper for restricting movement of the link is provided at a distal end portion of the guide shaft.

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