Reinforcing bar hanging jig

Abstract

To provide a highly versatile reinforcing bar hanging jig (capable of coping with all sites) for moving a reinforcing bar temporarily assembled on the ground in advance by a crane in a construction site of a reinforced concrete structure such as a bridge pier of an expressway.SOLUTION: The reinforcing bar hanging jig for temporarily assembling reinforcing bars on the ground in advance at a construction site of a reinforced concrete structure such as a bridge pier of a highway includes a hanging jig body 20 and a reinforcing bar receiving member 30 for placing the reinforcing bars during temporary assembly, and the hanging jig body 20 has a plurality of through holes 40 bored at predetermined intervals. The reinforcing bar receiving member 30 has a reinforcing bar receiving part 50 for placing the reinforcing bar and a through-hole 60, and has a fixing member for fixing the reinforcing bar receiving member 30 to the suspending tool body 20 and a support pin member inserted into the through-hole 40 of the suspending tool body 20 for supporting the reinforcing bar receiving member 30.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a reinforcing bar lifting jig for use in a crane to move reinforcing bars that have been temporarily assembled on the ground in advance at a construction site for a reinforced concrete structure such as a bridge pier for a highway. [Background technology]

[0002] Prefabrication, in which the rebar portions (mainly the reinforcing bars) of columnar structures (reinforced concrete structures) such as highway bridge piers are temporarily assembled on the ground near the construction site and then transported to the site by crane, is known as an effective means of shortening construction time and improving construction efficiency.The advantages of prefabrication include a significant reduction in on-site assembly time, thereby shortening construction time, and a reduction in the risk of accidents caused by working at height, as more work is done on the ground.

[0003] Patent Document 1 addresses the issue of "obtaining a support device for a rebar temporary assembly jig that is easy to assemble because the support brackets do not get in the way and that reduces costs by shortening the time required for temporary assembly of rebar (Patent Document 1: Abstract)," and discloses a support device for a rebar temporary assembly jig (Patent Document 1: Name of the invention) in which "in a temporary assembly jig comprising a required number of temporary assembly jig bodies to which a plurality of support brackets are pivotally attached, a holding means is provided on at least one of the temporary assembly jig bodies or the support brackets that can be arbitrarily released so that the support brackets can be rotated from a supported state and held in an inverted state (Patent Document 1: Abstract)." [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Utility Model Registration No. 3132735 Summary of the Invention [Problem to be solved by the invention]

[0005] The support receiving device for a rebar temporary assembly jig described in Patent Document 1 (Patent Document 1: name of the invention) is provided with a holding means that can optionally release the holding of at least one of the temporary assembly jig or the support receiving bracket so that the support receiving bracket can be rotated from a supported state and held in an inverted state.When the jig is used to transfer the rebar, the support receiving bracket is inverted by the lifted rebar and held in that inverted state.This means that the upper support receiving bracket does not get in the way during temporary assembly, and even when assembling rebar for earthquake-resistant structures, assembly work can be easily carried out sequentially from the lowest support receiving bracket on the temporary assembly jig.However, if the (vertical) spacing between support receiving brackets is fixed as in the support receiving device for a rebar temporary assembly jig described in Patent Document 1 (Patent Document 1: name of the invention), the vertical spacing of the rebar often varies from site to site, and the support receiving device must be redesigned to change the spacing of the support receiving brackets each time.

[0006] The object of the present invention is to provide a highly versatile rebar lifting jig (suitable for use at any construction site) for use in a crane to move rebars that have been pre-assembled on the ground at construction sites of reinforced concrete structures such as highway bridge piers. [Means for solving the problem]

[0007] In order to solve the above problems, the invention described in claim 1 is a reinforcing bar hoisting jig for moving reinforcing bars that have been temporarily assembled on the ground in advance at a construction site of a reinforced concrete structure such as a bridge pier of a highway, by using a crane, It is equipped with the lifting jig itself and a rebar support member for placing rebars during temporary assembly. The hoisting jig body has a plurality of through holes drilled at predetermined intervals, The reinforcing bar receiving member has a reinforcing bar receiving portion on which a reinforcing bar is placed and a through hole, Furthermore, a fixing member for fixing the reinforcing bar receiving member to the lifting jig body; The reinforcing bar lifting jig is characterized by comprising a support pin member that is inserted into a through hole in the lifting jig body to support the reinforcing bar receiving member.

[0008] The invention described in claim 2 is characterized in that, in the invention described in claim 1, the fixing member and the support pin member are a reinforcing bar hanging jig connected via a wire.

[0009] The invention described in claim 3 is a reinforcing bar hanging jig according to the invention described in claim 1 or claim 2, characterized in that when the reinforcing bar receiving members are installed on the hanging jig body, adjacent reinforcing bar receiving members in the vertical direction are installed on different sides of the hanging jig body. [Effects of the Invention]

[0010] The present invention provides a rebar lifting jig for transporting rebars that have been temporarily assembled on the ground by crane at construction sites for reinforced concrete structures such as highway bridge piers. The jig includes a lifting jig body and a rebar receiving member on which the rebars are placed during temporary assembly. The lifting jig body has a plurality of through holes drilled at predetermined intervals, and the rebar receiving member has a rebar receiving portion on which the rebars are placed and a through hole. Therefore, when fastening the rebar receiving member to the lifting jig body, it is possible to select from the through holes drilled at predetermined intervals for each site. Therefore, when installing the rebar receiving member on the lifting jig body, the spacing between the rebar receiving members can be freely selected to suit the site.

[0011] When installing the rebar support members on the main body of the lifting jig, adjacent rebar support members in the vertical direction are installed so that they are on different sides of the main body of the lifting jig, so that when (at a construction site for reinforced concrete structures such as highway bridge piers) the rebar that has been temporarily assembled on the ground is moved by crane and the temporarily assembled rebar (mainly the reinforcing bars) is removed from the rebar lifting jig, the fixing members (bolts and nuts) that secure the rebar support members are loosened, and then the support pin members are removed from the through holes (in the rebar support members) and the rebar support member is rotated downwards (using the fixing members as the axis of rotation), there is no interference between adjacent rebar support members in the downward direction. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 2 is an exploded view of the reinforcing bar suspending jig according to the present invention. [Figure 2] FIG. 1 is an overall view of a reinforcing bar lifting jig. [Figure 3] This is a diagram showing the state in which a rebar hoisting jig is installed on a temporarily assembled rebar. DETAILED DESCRIPTION OF THE INVENTION

[0013] <Structure of rebar lifting jig> An embodiment of a reinforcing bar suspension jig 10 according to the present invention will be described in detail below with reference to Figures 1 to 3. Figure 1 is an exploded view of a reinforcing bar suspension jig 10 according to the present invention.

[0014] The reinforcing bar hoisting jig 10 according to the present invention is a reinforcing bar hoisting jig used to move reinforcing bars that have been pre-assembled on the ground by crane at a construction site for a reinforced concrete columnar structure such as a highway bridge pier. As shown in Fig. 1, the reinforcing bar hoisting jig 10 is composed of a hoisting jig main body 20 and a reinforcing bar receiving member 30 on which the reinforcing bar is placed during pre-assembly (see Fig. 1: exploded view).

[0015] The hoisting jig body 20 is made of steel plate (SS400) with a total length of approximately 1100 mm, a width of approximately 120 mm, and a thickness of approximately 12 mm, and has a plurality of through holes 40 (Φ12 mm (for fixing members 70) or Φ11 mm (for support pin members 80) drilled at predetermined intervals (25 mm intervals). To describe the through holes 40 in more detail, the through holes 40 are drilled in two rows along the vertical direction of the hoisting jig body 20. One of the vertical rows is the through holes 40 for the fixing members 70, and the other vertical row is the through holes 40 for the support pin members 80.

[0016] The reinforcing bar receiving member 30 is a steel plate (SS400) measuring 150 mm wide x 70 mm long and approximately 6 mm thick, and is provided with a reinforcing bar receiving portion 50 (recess width approximately 40 mm, recess curvature R approximately 20 mm) on which the reinforcing bar is placed, and a through hole 60 (Φ12 mm (for the fixing member 70)).

[0017] Furthermore, the reinforcing bar hoisting jig 10 is equipped with a fixing member 70 for fixing the reinforcing bar receiving member 30 to the hoisting jig body 20, and a support pin member 80 that is inserted into the through hole 40 of the hoisting jig body 20 to support the reinforcing bar receiving member 30. Note that the fixing member 70 and the support pin member 80 are connected to each other by wire (such as stainless steel wire) in consideration of workability.

[0018] 2 is an overall view of the reinforcing bar hoisting jig 10. When the reinforcing bar receiving members 30 are installed on the hoisting jig body 20, the reinforcing bar receiving members 30 that are adjacent in the vertical direction are installed on different sides of the hoisting jig body 20. By placing adjacent reinforcing bar receiving members 30 in the vertical direction on different surfaces (front and back) of the lifting jig body 20, when the temporarily assembled reinforcing bars (mainly the reinforcing bars) are removed from the reinforcing bar lifting jig 10 after being moved by crane on the ground, the fixing members 70 (bolts and nuts) that fix the reinforcing bar receiving members 30 are loosened, the support pin members 80 are removed from the through holes (of the reinforcing bar receiving members), and the reinforcing bar receiving members 30 are rotated downward (around the fixing members 70 as the axis of rotation) (the support pin members 80 can also be removed from the through holes (of the reinforcing bar receiving members) and the fixing members 70 (bolts and nuts) that fix the reinforcing bar receiving members 30 can be loosened). This prevents interference between adjacent reinforcing bar receiving members 30 in the downward direction.

[0019] <How to use the rebar lifting jig> Figure 3 is a diagram showing the state in which reinforcing bar hoisting jig 10 is installed on temporarily assembled reinforcing bars. That is, it is a diagram for explaining how to use reinforcing bar hoisting jig 10. As shown in Figure 3, multiple reinforcing bar hoisting jigs 10 are attached to reinforcing bars (mainly arranged reinforcing bars) that have been temporarily assembled on the ground, and the tips of the multiple reinforcing bar hoisting jigs 10 are secured (using hooks attached to a crane) and the temporarily assembled reinforcing bars (mainly arranged reinforcing bars) are lifted together with the multiple reinforcing bar hoisting jigs 10 and moved to the construction site (see Figure 3).

[0020] After the reinforcing bars that have been temporarily assembled on the ground are moved to the construction site by a crane, and after the installation of the reinforcing bars (mainly reinforcing bar arrangement) is completed at the construction site, the fixing members 70 (bolts and nuts) that fix the reinforcing bar receiving member 30 are loosened, the support pin members 80 are removed from the through holes 60 (of the reinforcing bar receiving member), and the reinforcing bar receiving member 30 is rotated downward (with the fixing members 70 acting as the axis of rotation) (it is also possible to remove the support pin members 80 from the through holes 60 (of the reinforcing bar receiving member) and then loosen the fixing members 70 (bolts and nuts) that fix the reinforcing bar receiving member 30), thereby removing the (plurality of) reinforcing bar lifting jigs 10 from the temporarily assembled reinforcing bars (moved to the construction site by a crane).

[0021] <Effect of rebar lifting jig> The reinforcing bar lifting jig 10 has through holes 40 drilled at predetermined intervals in the lifting jig body 20, allowing the installation interval of the reinforcing bar receiving members 30 to be freely selected.Therefore, when fixing the reinforcing bar receiving members 30 to the lifting jig body 20, by selecting through holes 40 (drilled at predetermined intervals (25 mm)) for each site, when installing the reinforcing bar receiving members 30 on the lifting jig body 20, the spacing between the reinforcing bar receiving members 30 can be freely selected to suit the site.

[0022] When the reinforcing bar receiving members 30 are installed on the lifting jig main body 20, adjacent reinforcing bar receiving members 30 in the vertical direction are installed so that they are on different sides (front and back) of the lifting jig main body 20. Therefore, when temporarily assembled reinforcing bars are moved on the ground by crane (at a construction site of a reinforced concrete structure such as a highway bridge pier) and the temporarily assembled reinforcing bars (mainly the reinforcing bars) are removed from the reinforcing bar lifting jig 10, the fixing members 70 (bolts and nuts) that fix the reinforcing bar receiving members 30 are loosened, and then the support pin members 80 are removed from the through holes 60 (of the reinforcing bar receiving members 30) and the reinforcing bar receiving members 30 are rotated downward (with the fixing members 70 as the rotation axis), the reinforcing bar receiving members 30 that are adjacent in the downward direction will not interfere with each other.

[0023] <Example of changing rebar lifting jig> The reinforcing bar lifting jig of the present invention is not limited to the aspects of the above-mentioned embodiments, and the configurations of the lifting jig body, reinforcing bar receiving member, through hole (lifting jig body), reinforcing bar receiving portion, through hole (reinforcing bar receiving member), fixing member, support pin member, etc. can be appropriately modified as needed within the scope of the intent of the present invention. [Industrial Applicability]

[0024] Since the reinforcing bar lifting jig of the present invention has the excellent effects as described above, it can be suitably used as a reinforcing bar lifting jig for moving reinforcing bars that have been pre-assembled on the ground by crane at construction sites of reinforced concrete structures such as highway bridge piers. [Explanation of symbols]

[0025] 10. Rebar lifting jig 20··Hanging jig body 30 Reinforcement bar support member 40··Through hole (hanging jig body) 50··Reinforcing bar support 60··Through hole (reinforced bar support member) 70 Fixing member 80··Support pin member

Claims

1. A rebar lifting jig for crane movement of rebars that have been pre-assembled on the ground at construction sites of reinforced concrete structures such as highway bridge piers, It is equipped with the lifting jig itself and a rebar support member for placing rebars during temporary assembly. The hoisting jig body has a plurality of through holes drilled at predetermined intervals, The reinforcing bar receiving member has a reinforcing bar receiving portion on which a reinforcing bar is placed and a through hole, Furthermore, a fixing member for fixing the reinforcing bar receiving member to the lifting jig body; A reinforcing bar lifting jig characterized by comprising a support pin member that is inserted into a through hole in the lifting jig body to support the reinforcing bar receiving member.

2. The reinforcing bar suspending jig according to claim 1, wherein the fixing member and the support pin member are connected via a wire.

3. A reinforcing bar suspension jig as described in claim 1 or claim 2, characterized in that when the reinforcing bar receiving members are installed on the suspension jig body, adjacent reinforcing bar receiving members in the vertical direction are installed so that they are on different sides of the suspension jig body.

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