JP2599368Y2 - Column rebar lifting jig - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a rebar construction for a reinforced concrete building, in which a single-story column rebar can be pre-assembled on the ground, and the need for assembling a scaffold and working at heights is eliminated. It is related to a jig.

[0002]

2. Description of the Related Art Conventionally, in steel bar construction in a reinforced concrete building, upper and lower column bars are connected by pressing one main bar located in a vertical direction one by one, and then another worker connects the column bars. This is done by wrapping hoop muscles horizontally around the connected main muscles on a scaffolding around them.

[0003] Recently, the main reinforcements at the four corners of the column reinforcement are made threaded joints, and the remaining main reinforcements are made lap joints.
Means for pre-assembly of column reinforcement on the ground are also being considered.

[0004]

However, in the above two prior arts, it is necessary to assemble a scaffold around the column reinforcing bar, and it is necessary to perform dangerous work on the scaffold. Also, in the prior art in which the main reinforcement is a lap joint,
The use of a lap joint causes a problem that the space (space) between the main reinforcing bars is insufficient, and that portion is insufficiently filled with concrete.

[0005] The present invention has been made in view of the above-mentioned problems, and it is possible to pre-assemble column reinforcing bars, to eliminate the need for assembling scaffolds and work at heights, and to provide a sufficient space between main reinforcing bars. An object is to provide a lifting jig.

[0006]

Means for Solving the Problems As means for that,
The present invention comprises a lower jig 1 and an upper jig 2. Lower jig 1
The holding member 4 includes an inner member 5 and an outer member 6 for detachably holding the lower end portion of the pillar reinforcing bar 3 assembled on the ground from inside and outside, and a fastening member 7 formed on the holding member 4 is inserted with play. Loose holes 8 and a plurality of assembling portions formed to assemble lifting sling wires 9 to the holding member 4.
It consisted of 10 and.

The upper jig 2 is provided at the upper end of the column reinforcing bar 3.
An upper body having an insertion portion for detachably attaching to the column reinforcing bar 3
12 and a slinging wire 9 for lifting at the outer end of the upper body 12.
The upper end of the slinging wire 9 assembled to the assembling portion 10 of the lower jig 1 is formed so as to be inserted into the outer end of the upper body 12 and the plurality of engaging portions 13 provided to engage with each other. It comprises a plurality of guide portions 14.

The inner member 5 and the outer member 6 of the lower jig 1 are made of an angle material, the assembling part 10 is made of a hole formed in the angle material, and the upper body 12 of the upper jig 2 is made of a pillar. Reinforcing bar 3
Is constituted by an angle material supporting from the inside, and the loose fitting portion 11 is constituted by projecting a pipe material from the angle material in a loop shape,
The guide portion 14 can be constituted by a space formed by extending the metal member 15 on the angle member, and the engaging portion 13 can be constituted by a shackle.

[0009]

In order to connect the column reinforcing bar 3 to the suspended column reinforcing bar 3 with the jig according to the present invention, first, as shown in FIG. The lower jig 1 is mounted on the upper jig and the upper jig 2 is mounted on the upper end. As shown in FIGS. 3 and 4, the lower jig 1 is assembled by clamping the main reinforcement 17 between the inner member 5 and the outer member 6 from inside and outside, and inserting and tightening the fastening members 7 into the respective loose holes 8. Done by As shown in FIGS. 5 and 6, the upper jig 2 is supported by supporting the upper main body 12 along the upper end of the column reinforcing bar 3. At this time, the main bars 17 are inserted into the respective loose fitting portions 11 to stabilize the support.

After the attachment of the lower jig 1 and the upper jig 2 is completed, a plurality of slinging wires 9 of the hoist are assembled to the plurality of assembling portions 10 of the lower jig 1, respectively. The plurality of slinging wires 9 need to be assembled to the assembling portion 10 through the plurality of guide portions 14 formed at the upper end of the column reinforcing bar 3, respectively.
Further, before and after this, another slinging wire 9 from the hoisting machine is engaged with each engaging portion 13 of the upper jig 2.

After the engagement between the lower jig 1 and the upper jig 2 and the slinging wire 9 is completed, the slinging wire 9 is lifted by a hoist as shown in FIG. This lifting is achieved by the interaction between the lower jig 1 and the upper jig 2. That is, the lifting force acts on the lower end of the column reinforcing bar 3 via the lower jig 1, and the column reinforcing bar 3 is lifted. At this time, since the upper part of the slinging wire 9 engaged with the lower jig 1 is inserted through the guide portion 14 formed at the outer end of the upper jig 2, the slinging wire 9 is moved to the upper end of the column rebar 3. It becomes a state of being lifted while supporting the outer end of the portion, and thus the column rebar 3 can be lifted in a stable posture. Since the upper jig 2 is in a loosely fitted state with the column reinforcing bar 3, it does not transmit a lifting force to the column reinforcing bar 3.

The slinging wire 9 is sufficiently lifted, and the column reinforcing bar 3
Is moved to a position just above the lower column rebar 3 (see FIG. 2). In this state, the main reinforcing bars 17 are aligned with the upper end surfaces of the lower main reinforcing bars 17 corresponding to the main reinforcing bars 17, and a worker presses the upper reinforcing bar 17 to connect the upper and lower column reinforcing bars 3. If the upper main bar 17 and the lower main bar 17 are displaced and do not coincide with each other, the fastening member 7 is loosened and the main bar 17 is moved right and left to match. However, in this case, the main bar 17 may hit the fastening member 7. However, in the present invention, since the hole through which the fastening member 7 is inserted is formed as the loose hole 8, the fastening member 7 can escape to the left and right, so that the main reinforcing bars 17 can be surely and accurately matched.

When the connection of the upper and lower column reinforcing bars 3 is completed or completed to some extent, the slinging wire 9 is detached from the holding member 4, and the fastening member 7 holding the holding member 4 is removed to remove the holding member 4 from the column reinforcing bar 3. remove. Next, the lifting machine is operated to lift the slinging wire 9. On this occasion,
The upper jig 2 is engaged with another slinging wire 9, and thus the upper jig 2 is detached from the column reinforcing bar 3 by being lifted up. Since the column reinforcing bar 3 is simply loosely fitted to the loose fitting portion 11 of the upper jig 2, the column reinforcing bar 3 is easily separated from the column reinforcing bar 3 by lifting the slinging wire 9.

[0014]

3 to 6 show an embodiment of the present invention. The lower jig 1 (FIGS. 3 and 4) according to the present embodiment is a flat quadrangular shape corresponding to a quadrangular columnar rebar 3 assembled by winding a hoop bar 18 around the outer periphery of a main bar 17, and four pairs of holding members 4 are provided. Loose holes (elongated holes) 8 through which fastening members 7 (bolts) are inserted
And an assembling portion 10 for achieving engagement with the hook of the lifting machine. The holding member 4 includes an inner member 5 for holding the main bar 17 from the inside and an outer member 6 for holding the main bar 17 from the outside. Each of the inner member 5 and the outer member 6 is formed of an angle material. Assembling part 10
Is formed by forming a hole in which the hook is engaged with two pairs of the lower holding members 4 of the four pairs of the holding members 4.

The upper jig 2 in this embodiment is provided with a guide portion 14, a loose fitting portion 11 and an engaging portion 13 on an upper body 12 which is formed of an angled material in a plane square shape corresponding to the shape of the column reinforcing bar 3. The outer end surface is set so as to contact the inner surface of the main bar 17. The guide portion 14 is formed of a space formed by suspending a metal material (round steel) 15 inside the four corners of the upper main body 12. Loose fitting
Reference numeral 11 denotes a configuration in which a round pipe is protrudingly provided in a U-shape outside the four corners of the upper body 12. Further, the engaging portion 13 is formed by standing upside-down U-shaped shackles on the upper surface of the four corners of the upper body 12.

Using the jig of the present invention in such a configuration, as shown in FIGS. 1 and 2, the column reinforcing bar 3 pre-assembled on the ground is lifted by the lifting machine as described in the operation section. If there is a possibility that the column reinforcing bar 3 will bend due to its own weight at the stage of the above, the auxiliary wire 16 from another lifting machine is engaged slightly below the intermediate portion of the column reinforcing bar 3 and lifted to lift the column reinforcing bar 3. After being suspended in the air, it is preferable to be in an upright posture (see FIG. 2).

In this embodiment, the upper body 12 of the upper jig 2 and the holding member 4 of the lower jig 1 are made of an angle material.
It is not limited to angle materials. Also, the engaging portion 13 and the assembling portion 10 need only be configured so that the hook can be engaged, and are not limited to holes or shackles. Similarly, the guide portion 14, the loose fitting portion 11, and the fastening member 7 are not limited to the configuration shown in this embodiment.

[0018]

[Effects of the Invention] The jig for lifting column reinforcement according to the present invention lifts the assembled column reinforcement while maintaining its shape and enables connection with the lower column reinforcement. In addition to this, since it is not necessary to perform a high-place work by assembling a scaffold as in the related art, it is possible to improve work efficiency and promote safe work. Such an effect is more remarkable as the floor height is higher, and the construction period can be significantly shortened with a decrease in the number of steps.

Further, unlike the conventional lap joint, there is no problem that the space is reduced and the concrete is not sufficiently filled.

[Brief description of the drawings]

FIG. 1 is a use example showing a state in which a column rebar is lifted by a jig according to the present invention.

FIG. 2 is a use example showing a state in which a column rebar is lifted by a jig according to the present invention.

FIG. 3 is a plan view showing a lower jig in one embodiment of the present invention.

FIG. 4 is a side view of the lower jig shown in FIG. 3;

FIG. 5 is a plan view showing the upper jig in one embodiment of the present invention.

FIG. 6 is a side view of the upper jig shown in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower jig 2 Upper jig 3 Column rebar 4 Holding member 5 Inner member 6 Outer member 7 Fastening member 8 Loose hole 9 Sling wire 10 Assembling part 11 Free fitting part 12 Upper body 13 Engaging part 14 Guide part 15 Metal material 16 Auxiliary wire 17 Main bar 18 Hoop bar

Continuing on the front page (72) Inventor Michiaki Muranaka 13 Takashima, Noyoro-cho, Iwakura-shi, Aichi Meisho Kogyo Co., Ltd. (58) Field surveyed (Int.Cl. ⁶ , DB name) E04G 21/16

Claims (2)

(57) [Scope of request for utility model registration] An inner member (5) and an outer member for detachably holding a lower end portion of a column reinforcing bar (3) pre-assembled on the ground from inside and outside.
(6) and a loose hole (8) through which a fastening member (7) formed on the holding member (4) is inserted with play.
And a slinging wire (9) for lifting the holding member (4).
A lower jig (1) composed of a plurality of assembling portions (10) formed so as to be assembled, and a loose fitting in which the column reinforcing bar (3) is loosely fitted to the upper end of the column reinforcing bar (3). An upper body (12) having a fitting portion (11), and a plurality of engaging portions (13) provided to engage a slinging wire (9) for lifting at an outer end of the upper body (12). , A sling wire attached to an attachment portion (10) of the lower jig (1) at an outer end of the upper body (12).
A plurality of guides (14) formed so that the upper end of (9) is inserted therethrough
An upper jig (2) composed of: and a column rebar lifting jig composed of: 2. An inner member (5) and an outer member (6) of a lower jig (1) are formed of an angle material, and an assembling portion (10) is formed of a hole formed in the angle material. The upper body (12) of the tool (2) is composed of an angle material that supports the column reinforcing bar (3) from the inside, and the loose fitting portion (11) is configured by projecting a pipe material from the angle material in a loop shape, and guiding The jig according to claim 1, wherein the portion (14) is constituted by a space formed by extending a metal material (15) on the angle member, and the engaging portion (13) is constituted by a shackle.