JPH0694727B2 - Pre-assembled jig for rebar - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a pre-assembly jig for reinforcing bars used in RC laminating method, etc. The present invention relates to a pre-assembly jig suitable for carrying on to an existing reinforcing bar site that should be firmly held and replenished without breaking.

[Prior Art] In the RC lamination method and the like, a work is performed in which new reinforcing bars are added and welded to a plurality of rising reinforcing bars that are vertically installed and fixed at appropriate intervals. In this case, the new rebars to be added are pre-assembled in the rebar pre-assembled yard in advance, carried in and suspended on the rising rebars, and the pre-assembled rebars are welded to each of the rising rebars. It is desirable to adopt a method from the viewpoint of efficiency and safety of the work.

[Problems to be Solved by the Invention]

However, in the conventional technology, an appropriate jig for pre-assembly has not been devised, so that it is one of the technical problems in the RC lamination method in which a large number of reinforcing bars are added and laminated.

As a means for solving such a technical problem, the present invention can efficiently pre-assemble a plurality of existing rebars with rebars to be replenished in a rebar preassembly yard, and at the same time during transportation and during replenishment work. It is an object of the present invention to provide a pre-assembly jig for reinforcing bars, which can prevent the shape of the steel from being deformed, can perform stable replenishment work in a relatively short time, and can greatly improve the work efficiency.

[Means for Solving the Problems]

In order to achieve the above object, the present invention has developed a pre-assembled jig having the following configuration as a jig for pre-assembling a plurality of reinforcing bars. First, a plurality of rebars to be assembled first are assembled by assembling an upper jig and a lower jig near the upper end and the lower end, respectively. The upper jig is composed of a horizontal outer frame composed of four outer frame members joined in a cross beam shape so as to be disassembled, and a plurality of reinforcing bar aligning members are hung in the horizontal outer frame at regular intervals. Removably attached to the left and right outer frame members that form the horizontal outer frame, and at the opposite ends of the two outer frame members, holding metal fittings for reinforcing bars are attached. A plurality of notches were provided at regular intervals.

The reinforcing bar aligning member is also provided with a plurality of notches for positioning the reinforcing bars at regular intervals.

Next, the lower jig is a horizontal fixing frame composed of four rod-shaped clamp members, which are equipped with a plurality of clamp fittings for fastening rebars at regular intervals, and are configured to be disassembled by connecting them in a grid pattern. A plurality of the rod-shaped clamp members are hung in a fixed frame and are detachably attached at regular intervals.

Further, the clamp metal fitting in the rod-shaped clamp member is
The present invention is characterized in that it is configured as a so-called interlocking rod-shaped clamp member in which the respective clamp fittings are simultaneously operated in conjunction.

[Action]

INDUSTRIAL APPLICABILITY The present invention provides a jig for preassembling a plurality of rebars as described above, including an upper jig to be assembled near the upper end of the rebars to be preassembled and a lower jig to be assembled near the lower end. In addition, the upper jig and the lower jig are configured to incorporate the notch part that has the positioning function of the reinforcing bars and the clamp metal fitting that has the gripping function as described above. It can be carried to the site without being distorted. In addition, it is easy to adjust the butt against the existing standing-up reinforcing bars. Further, in order to clarify this point, the outline of the pre-assembly procedure of the reinforcing bars by the upper jig and the lower jig will be described.

First, a horizontal girder-shaped outer frame is assembled with four outer frame members constituting the upper jig. Since two outer frame members out of the four outer frame members are equipped with grip fittings for gripping rebars, the grip fittings are located at the four corners of the horizontal outer frame. Therefore, the reinforcing bars to be assembled in advance are added to the grips at the four corners. Ie 4
The pre-assembled rebars of the book are held in the holding metal fittings at the four corners of the horizontal outer frame, and the horizontal outer frame itself is fixed near the upper ends of the four rebars while keeping the horizontal state.

Next, the four rod-shaped clamp members constituting the lower jig are arranged along the vicinity of the lower ends of the four rebars held at the four corners of the horizontal outer frame, and the clamps at both ends of each rod-shaped clamp member are provided. The four rebars are respectively passed through the metal fittings, and then the four rod-shaped clamp members are joined in a cross beam shape to form a horizontal fixing frame. Then, the four horizontal reinforcing bars that are to be assembled first are temporarily assembled with the horizontal girder-shaped outer frame forming the upper jig and the horizontal girder-shaped horizontal fixing frame forming the lower jig.

Next, in this state, a reinforcing bar aligning member is hung in the horizontal outer frame forming the upper jig, and a rod-shaped clamp member is hung in the horizontal fixing frame forming the lower jig.

Then, the rebars to be pre-assembled are vertically attached to the positioning notch of the rebars provided in the rebar aligning member of the upper jig and the corresponding clamp metal fittings of the rebars of the rod-shaped clamp member of the lower jig corresponding thereto. Follow.

Following the above procedure, the reinforcing bar aligning member and the rod-shaped clamp member are hung at a fixed interval in the horizontal outer frame of the upper jig and the horizontal fixing frame of the lower jig, respectively, and the reinforcing bars of the reinforcing bar aligning member are positioned. Reinforcing bars to be pre-assembled are provided vertically along the notch and the clamp fitting of the rod-shaped clamp member. After that, the rebars along the vertical direction are fastened and fixed by the clamp fittings in the rod-shaped clamp member, and the preassembly of a plurality of rebars is completed. As a result, the plurality of reinforcing bars are preliminarily and firmly assembled by the upper jig and the lower jig at a constant interval.

It should be noted that the outer frame member and the reinforcing bar aligning member constituting the upper jig are provided with grips for the reinforcing bars and the intervals of the notches for positioning the reinforcing bars, the intervals between the reinforcing bar aligning members, and the lower jig. The intervals of the clamps, etc., provided on the rod-shaped clamp members that make up the above shall be dimensioned so as to correspond to the axes of the existing rebars to be added when the upper jig and lower jig are assembled in advance. Of course, it is designed to be regulated.

〔Example〕

Next, the configuration of the pre-assembled jig according to the present invention and the procedure for assembling the jig will be specifically described based on the embodiments shown in the drawings.

FIG. 1 is a plan view showing an upper jig A as a pre-assembled jig, and FIG. 2 is a similar plan view of a lower jig B.

First, the upper jig A is composed of three main members shown in FIGS. 3 (1), (2), and (3).

The members shown in FIGS. 3 (1) and 3 (2) correspond to the first
In the outer frame members 1 and 2 shown in the figure, the four sides of the upper jig A are formed in a cross beam shape, and the member shown in (3) is the outer frame member 1.
It is a reinforcing bar alignment member which is hung and fixed inside the horizontal outer frame 4 in the shape of a girder constituted by 2 and 2.

First, the first outer frame member 1 is, as shown in FIG. 3 (1),
Equipped with gripping metal fittings 1a, 1a of the reinforcing bar 101 having a U-shaped cross section at both ends, and between the gripping metal fittings 1a, 1a, a semi-circular cutout portion 1b used for positioning the reinforcing bar 101 to be assembled first, 1b ... are provided at regular intervals. A lock bolt 1c for gripping and fixing the reinforcing bar 101 is attached to the grip metal fitting 1a, and further on the opposite side of the grip metal fittings 1a, 1a, that is, near both ends of the outer frame member 1, as shown in FIG. U-shaped groove 1d used when connecting with the outer frame member 2 which is the second member shown in
The connecting pieces 1e and 1e provided with are attached.

Next, the second outer frame member 2 is, as shown in FIG. 3 (2), a reinforcing bar to be pre-assembled at regular intervals in the longitudinal direction.
The semi-circular cutouts 2a, 2a ... Used for positioning 101 are provided, and the mounting holes 2b, 2b ... of the reinforcing bar aligning member 3 which is the third member shown in FIG. Has been drilled.

As shown in FIG. 3C, the reinforcing bar aligning member 3, which is the third member, is provided with semicircular cutouts 3a, 3a ... Used for positioning the reinforcing bar 101 in the longitudinal direction at regular intervals. ,
A connecting piece having U-shaped grooves 3d used at the time of attaching the reinforcing bar aligning member 3 itself to the outer frame member 2 near both ends.
It is equipped with 3c and 3c.

Next, the structure of the lower jig B (see FIG. 2) will be described.

The lower jig B is composed of two main members, a rod-shaped clamp member 21 and a coupling metal fitting 22 shown in FIGS. 4 (1) and (2). As shown in FIG. 4 (1), the rod-shaped clamp member 21 is configured by equipping the rod-shaped main body 21a made of a square pipe with clamp metal fittings 21b, 21b, ...

In FIG. 5, the clamp-shaped metal fittings 21b, 21b, ...
FIG. 3 is a cross-sectional view illustrating a mechanism configured to have 1b ... As shown in FIG. 4 (1) and FIG. 5, the clamp fittings 21b, 21b ... Are provided on the side surface of the rod-shaped body 21a and the fixing claws 21c, 21c. It has movable claws 21e, 21e ... Projected from the window holes 21d, 21d.

The movable claws 21e, 21e ... Are fixed to the operating shaft 21f housed inside the rod-shaped body 21a as shown in FIG. 5, and the operating shaft 21f is provided with an operating rod 21g made of a screw shaft. By inserting and rotating this operating rod 21g, the operating shaft 21f is moved left and right in the longitudinal direction, and in conjunction with this, the movable claws 21e, 21e ... Are moved closer to or away from the fixed claws 21c, 21c. So-called interlocking type clamp metal fittings 21b,
21b ... Reference numeral 21h is a mounting hole for inserting and mounting an operation handle (not shown) when rotating the operation rod 21g.

Next, FIG. 4 (2) shows a coupling fitting 22 used when the rod-shaped clamp member 21 is coupled. This fitting 22
Is a rod-shaped clamp member 21 that intersects at right angles as shown.
The connecting holes 22a and 22b into which the rod-shaped main body 21a is inserted are provided, and lock bolts 22c and 22c for locking the inserted rod-shaped main body 21a are provided on the side surfaces of the connecting holes 22a and 22b.

The above are the members constituting the upper jig A and the lower jig B.
Next, the upper jig A and the lower jig B using the above members
An example of the assembling procedure will be described with reference to the pre-assembly work of the reinforcing bar 101.

First, the horizontal outer frame 4 corresponding to the four sides of the upper jig A is assembled in a cross shape with two outer frame members 1 and two outer frame members 2.

That is, as shown in FIG. 1, the outer frame members 1 and 1 are placed on the left and right outer frame members 2 and 2 so that the plane has a cross beam shape. Then, using the connecting pieces 1e and 1e provided near both ends of the outer frame member 1 shown in FIG. 3 (1), the both are connected to form the horizontal outer frame 4.

FIG. 6 is a side view showing the connecting portion, in which the connecting piece 1e of the outer frame member 1 placed on the outer frame member 2 is attached to the connecting bolt and nut 5.
Tighten and combine. The connecting piece 1e has a U-shaped groove 1d.
Since it is provided, it is possible to adjust the dimensions at the time of coupling. Incidentally, FIG. 7 is a plan view of FIG.

As shown in FIG. 1, the gripping metal fittings 1a, 1a, 1a, 1a are arranged at the four corners of the horizontal girder-shaped horizontal outer frame 4 assembled in the above manner. While being held in this state, the reinforcing bars 101 to be pre-assembled are passed through the holding metal fittings 1a, 1a, 1a, 1a at the four corners, and the reinforcing bars 101 are fixed by the lock bolts 1c of the holding metal fitting 1a. In that case, the horizontal outer frame 4 is fixed near the upper end of the reinforcing bar.

Next, the four rod-shaped clamp members 21 constituting the lower jig B are placed near the lower ends of the four rebars 101 held by the horizontal outer frame 4 in the upper jig A, and the rod-shaped clamp members 21 are also provided. The reinforcing bars 101 are passed through the clamp metal fittings 21a, 21a ... In order to assemble a horizontal fixing frame 23 in the shape of a cross girder that forms the outer circumference of the lower jig B shown in FIG.

At this time, the rod-shaped clamp members 21 are joined together by using the fittings 22 shown in FIG. 4 (2).

That is, the coupling fitting 22 includes a rod-shaped body of the rod-shaped clamp member 21.
Since the connecting holes 22a and 22b are provided so that the connecting portions 21a can be connected orthogonally to each other, when the rod-shaped clamp members 21 are respectively inserted and connected to the connecting holes 22a and 22b, the outer circumference of the lower jig B shown in FIG. A horizontal girder-shaped horizontal fixed frame 23 is formed. FIG. 8 is a perspective view showing a connecting portion of the rod-shaped clamp member 21 by the connecting metal fitting 22. The rod-shaped main bodies 21a and 21a of the rod-shaped clamp member 21 are inserted into the connecting holes 22a and 22b of the connecting metal fitting 22 which are orthogonal to each other. Tighten the lock bolts 22c, 22c to connect them.

When the above work is completed, the four pre-assembled rebars 101
Is temporarily assembled in such a manner that the horizontal outer frame 4 of the upper jig A is held near its upper end and the horizontal fixed frame 23 of the lower jig B is held near its lower end.

Next, in this state, as shown in FIG. 1, the reinforcing bar aligning member 3 is hung inside the horizontal outer frame 4 constituting the upper jig A, and is fixed and attached at a constant interval.

That is, the reinforcing bar aligning member 3 is attached to the left and right outer frame members 2, 2 of the horizontal outer frame 4 by using the connecting pieces 3c, 3c provided near both ends of the reinforcing bar aligning member 3 shown in FIG. 3 (3). Install.

FIG. 9 is a side view showing a mounting joint portion between the reinforcing bar aligning member 3 and the outer frame member 2, and the reinforcing bar aligning member 3 is provided on the outer frame member 2.
Then, the connecting piece 3c of the reinforcing bar aligning member 3 is fastened and connected with the connecting bolt nut 6. Note that FIG. 10 is a plan view of FIG.

When the attaching work of the reinforcing bar aligning member 3 in the upper jig A is completed, the rod-shaped clamp members 21 are then hooked inside the horizontal fixing frame 23 in the lower jig B at a constant interval as shown in FIG. Combine and fix. In this case, the coupling and fixing is performed using the coupling metal fitting 22 of the lower jig B (see FIG. 8).

When the assembling of the reinforcing bar aligning member 3 and the rod-shaped clamp member 21 in the upper jig A and the lower jig B is completed as described above, the reinforcing bar aligning member 3 has a semi-circular shape for positioning the reinforcing bars 101 to be pre-assembled at regular intervals. Since the notches 3a, 3a ... And the clamp fittings 21b, 21b ... of the pre-assembled rebar 101 are similarly attached to the rod-shaped clamp member 21 at regular intervals,
The reinforcing bars 101 to be preassembled are sequentially aligned and arranged in the notched portions 3a and the clamp fittings 21b corresponding to the upper and lower sides. Then, the notches 1b, 2a, 3a of all members constituting the upper jig A and the lower jig B
When the bar arrangement to the clamp metal fittings 21b provided on the rod-shaped clamp part that composes the above is completed, the mounting hole 2 provided on the outer side of the operating rod 21g of the rod-shaped clamp member 21 having the clamp metal fittings 21b is provided.
Insert the operation handle into 1h and rotate it. Then, the clamp metal fittings 21b of the rod-shaped clamp members 21 interlock with each other to simultaneously fasten and fix the pre-assembled rebar 101 to the respective clamp metal fittings 21b, 21b. In this manner, the pre-assembly is completed by fastening all the reinforcing bars 101 with the clamp fittings 21b of all the rod-shaped clamp members 21 in this manner.

Note that FIG. 11 shows a state in which a plurality of rebars 101 are preassembled by the upper jig A and the lower jig B according to the present invention, carried in above an existing rising rebar 101a to be replenished, and suspended. Is.

As described above, the outer frame members 1 and 2 constituting the upper jig A have the intervals between the gripping metal fittings 1a at both ends, and the semicircular cutouts 1b, 1b ..., 2a formed for positioning the reinforcing bars. 2a
… Similarly, semicircular cutouts 3a, 3a in the reinforcing bar alignment member 3
The intervals between the ..., and the intervals between the clamp fittings 21b, 21b of the rod-shaped clamp member 21 in the lower jig B, when assembled as jigs, are different from those of the prefabricated rebars 101a in the pre-assembly. It is natural that the reinforcing bars 101 are designed so that the axes of the reinforcing bars 101 coincide with each other.

〔The invention's effect〕

As described above, the prefabricated jig of the reinforcing bars according to the present invention can preassemble a plurality of reinforcing bars corresponding to a plurality of established rebars by using the upper jig and the lower jig that can be assembled and disassembled. Therefore, the following effects are expected.

(1) Since both the upper jig and the lower jig are assembled and disassembled, it is possible to increase the number of pre-assembled rebars in accordance with the assembly order of the jigs and preassemble all the rebars. As a result, the pre-assembly work is efficiently performed.

(2) The upper jig and the lower jig are equipped with semi-circular cutouts and interlocking clamp fittings that have the function of positioning the pre-assembled rebar. At this point, the shaft center of each of the pre-assembled rebars accurately matches the shaft center of the existing rising rebars to be added, so that the next work, that is, the weld joint work can be efficiently performed.

(3) In particular, since the lower jig is configured to fasten and fix the vicinity of the lower end of the pre-assembled rebar using the clamp fittings, each rebar is firmly restrained in the horizontal plane and the vertical plane. There is no need to worry about misalignment of the array dimensions during delivery to the site.

(4) To remove the jig after the joint welding,
As described in (1), both the upper jig and the lower jig are of the assembled and disassembled type, so that it can be performed extremely easily.

As a result, the work of assembling the reinforcing bars in the RC laminated construction method, which is performed by adding a plurality of reinforcing bars, is significantly more efficient than the conventional work, and can greatly contribute to the improvement of the work.

[Brief description of drawings]

The drawings show an embodiment of a pre-assembled jig according to the present invention. FIG. 1 is a plan view of an upper jig constituting the pre-assembled jig, and FIG. 2 is a plan view of the lower jig. Figure 3 (1) (2)
(3) is a perspective view of the outer frame member and the reinforcing bar aligning member of the main members that make up the upper jig, and FIGS. 4 (1) and (2) are the bar-shaped clamp members and connecting fittings of the main members that make up the lower jig. It is a perspective view. FIG. 5 is a sectional view showing the mechanism of the rod-shaped clamp member shown in FIG. 4, FIG. 6 is a side view showing a joint portion between outer frame members in an upper jig, and FIG. 7 is a plan view thereof. . FIG. 8 is a perspective view showing a connecting portion of the rod-shaped clamp member by the connecting fitting shown in FIG. 4 (2), and FIG. 9 is a side view showing a connecting portion of the outer frame member and the reinforcing bar aligning member in the upper jig. FIG. 10 is a plan view thereof, and FIG. 11 is a side view showing a state in which a reinforcing bar preassembled by the assembling jig of the present invention is suspended in order to add it to an existing standing reinforcing bar. A ... Upper jig, B ... Lower jig 1 ... Outer frame member, 1a ... Grip fitting 1b ... Notch part, 1c ... Lock bolt 1d ... U-shaped groove, 1e ... Connection piece 2 ... Outer frame member, 2a ... Notch part 2b ... Mounting hole, 3 ... Reinforcing bar aligning member 3a ... Notch, 3b ... U-shaped groove 3c ... Coupling piece, 4 ... Horizontal outer frame 5,6 ... Bolt nut for connection 21 ... Rod-shaped clamp member 21a ... Rod-shaped main body, 21b ... Clamping metal fitting 21c… Fixing claw, 21d… Window hole 21e… Moveable claw, 21f… Operating shaft 21g… Operating rod 21h… Operating handle mounting hole 22… Coupling metal fitting 22a, 22b… Coupling hole 22c… Lock bolt, 23… Horizontal fixing frame 101 ... Rebar

Claims (2)

[Claims] 1. A pre-assembled jig in which an upper jig and a lower jig are assembled near the upper end and the lower end of a reinforcing bar, and a plurality of reinforcing bars are preassembled corresponding to existing reinforcing bars to be replenished. In the above, the upper jig is a horizontal outer frame that is constructed by connecting four outer frame members in the shape of a girder and can be disassembled, and a plurality of reinforcing bar aligning members can be attached and detached inside this horizontal outer frame at regular intervals. The left and right outer frame members of the horizontal outer frame are provided with grips for reinforcing bars at both ends, and the notches for positioning the reinforcing bars are also provided between the grips. A plurality of notches for positioning the rebars are also provided at a constant interval in the rebar aligning member, and the lower jig tightens the rebars. A rod-shaped clamp with multiple clamp fittings to be worn at regular intervals A horizontal fixing frame configured by connecting four of them in a cross beam shape so that they can be disassembled, and a plurality of the rod-shaped clamp members are detachably fixed at regular intervals in the horizontal fixing frame. Characteristic rebar pre-assembly jig. 2. The reinforcing bar according to claim 1, wherein the rod-shaped clamp member provided with a plurality of clamp metal fittings in the lower jig is an interlocking rod-shaped clamp member in which the respective clamp metal fittings operate simultaneously. Assembled jigs.