JPH1044128A - Precast plate working formwork - Google Patents

Abstract

(57) [Summary] [Problem] It is extremely troublesome to arrange a reinforcing bar projecting from an end face of a precast plate on a formwork and to remove the precast plate from the formwork. SOLUTION: A frame 1 for molding each end face of a precast plate.
0 are provided on a base for molding one side surface of the precast plate, and these frame bodies 10 have rebar arrangement holes 20 for disposing rebars protruding from the end surfaces of the precast plate. The upper frame 11 and the lower frame 12 are vertically divided into two parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precast plate working form for producing a precast plate having a reinforcing bar protruding from an end face.

[0002]

2. Description of the Related Art Some precast plates having a reinforcing bar incorporated therein are manufactured by projecting a reinforcing bar from an end face. This reinforcing bar protrudes from the end surface, when installing the precast plate on the building structure, increases the bonding strength between adjacent precast plates, or joins the precast plate with the dowel provided on the beam or column It is provided to increase the strength.

FIG. 4 shows an example of such a precast plate.
Shown in The precast plate 1 has a shape in which a reinforcing bar 3 bent in a U-shape from an end surface of a concrete portion 2 having a rectangular shape in a plan view and a uniform thickness has a bent portion protruding from the end surface. Such a precast plate 1 is also shown in FIG.
It is manufactured by the formwork 4 as shown in FIG. This formwork 4
Are rectangular-shaped precast plates 1 formed on a substrate (not shown) and arranged in four directions, and are fixed to the substrate by bolts and nuts. A slit 6 is formed at a position where the reinforcing bar 3 protrudes in a frame 5 for molding an end face of the precast plate 1.

The procedure for manufacturing the precast plate 1 using the formwork 4 is as follows. First, each frame 5 is fixed on a base, and reinforcing bars are arranged inside the frame 5 arranged on all sides. Further, the reinforcing bar 3 is provided so as to protrude from the slit 6 around the reinforcing bar, and concrete is cast so as to bury the reinforcing bar. Here, in the gap between the slit 6 from which the reinforcing bar 3 is protruded and the reinforcing bar 3, as shown in FIG. 5, a padding 7 such as a foam material is provided in order to prevent leakage of concrete. Then, after a sufficient curing period, each frame 5 is removed from the base and the precast plate 1 is released to complete the operation.

[0005]

However, when a precast plate is manufactured using the above-described mold, the following problems are raised. The work of projecting a reinforcing bar from a large number of slits formed in the frame and the work of filling the slit with a foam material or the like are troublesome. It is impossible to completely stop the leakage of concrete from the slit by filling, and concrete leaks out from a slight gap and solidifies while adhering to the rebar,
A problem may occur when the precast plate is joined by wrapping the reinforcing bars. When removing the precast plate, it takes time to remove the frame from the precast plate because the reinforcing bar and the slit rub against each other.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a working mold for a precast plate which can easily and beautifully produce a precast plate having a reinforcing bar protruding from an end face. The purpose is.

[0007]

According to a first aspect of the present invention, there is provided a precast plate forming form for producing a precast plate in which a reinforcing bar is projected from an end face. A plurality of frame bodies to be molded are provided on a substrate for molding one side surface of the precast plate, and the frame body is
It has a rebar arrangement hole for disposing a reinforcing bar protruding from the end face of the precast plate, and has a two-part structure of an upper frame and a lower frame which divide the rebar arrangement hole up and down. In this precast plate working form, when assembling a reinforcing bar, the frame is divided into an upper frame and a lower frame, and the reinforcing-bar arrangement holes are divided so that the reinforcing bar projects from the end face of the precast plate. Can be easily arranged. Furthermore, when removing the precast plate, the frame is divided in the same manner, so that the precast plate can be easily removed without removing the frame from the base.

According to a second aspect of the present invention, there is provided a working mold for manufacturing a precast plate, wherein the upper frame is formed integrally with the lower frame to form a reinforcing-bar arrangement hole, and the reinforcing-frame arrangement hole is separated from the lower frame. Is supported so as to be movable between a position where the image is vertically divided. In the working frame made of a precast plate, the upper frame is supported so as to be movable between two positions, so that the frame can be easily divided and integrated into the original state.

According to a third aspect of the present invention, the working form for manufacturing a precast plate is closely mounted around the reinforcing bar protruding from the end face of the precast plate in the reinforcing bar arranging hole to close a gap between the reinforcing bar and the reinforcing bar arranging hole. The body is installed. In this precast plate working form, by installing the closing body, it is possible to prevent concrete from leaking from the reinforcing bar arrangement hole.

[0010] The working form for a precast plate described in claim 4 is characterized in that the closing body is divided so as to be mounted with a reinforcing bar interposed therebetween. In this working frame made of a precast plate, the closing body can be easily attached and detached from the rebar by dividing the closing body.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a working mold for producing a precast plate according to the present invention will be described with reference to FIGS. The formwork (working form made of precast plate) shown in FIG.
Frame 1 for molding each end face of a rectangular precast plate in plan view
. Are mounted on all sides to form a concrete casting space on a base (not shown) for molding one side of the precast plate.

The frame body 10 is arranged perpendicularly to the upper surface of the base, and is a side plate portion 10a for molding the end face of the precast plate.
And a bottom plate 10b disposed perpendicularly to the side plate 10a and fixed to the upper surface of the base plate. The bottom plate 10b has an L-shaped cross section. The side plate 10a has a reinforcing bar projecting from the end face of the precast plate. Rebar arrangement hole 20 for inserting and disposing
Are formed.

Further, the frame 10 has a two-part structure of an upper frame 11 and a lower frame 12 which vertically divide each rebar arrangement hole 20. The upper frame 11 and the lower frame 12 are rotated. They are connected by hinges 13. This rotating hinge 13
As a result, the upper frame 11 is fixed to the lower frame 1 fixed to the base.
A position where each rebar placement hole 20 is formed integrally with 2;
It moves upward and separates from the lower frame 12, and is supported so as to be movable between positions at which the reinforcing bar disposing holes 20 are vertically divided.

The reinforcing bar arrangement holes 20 are arranged at intervals in the length direction of the frame 10 and are perpendicular to the side plate 10a, that is, in a direction parallel to the base.
Is formed in a state penetrating through. In addition, rebar arrangement hole 2
Reinforcing bars protruding from 0 are in a state where a portion bent in a U-shape protrudes outward, and are placed in a state of being laid down in a state parallel to the base, and standing upright in a state perpendicular to the base. The first and second rebar placement holes 20 and 22 are arranged in the rebar placement hole 20 for placing rebar parallel to the base and the rebar placement perpendicular to the base, respectively. Are provided.

The first reinforcing-bar placement hole 21 is formed in a state where two small holes are laterally separated in order to place the reinforcing bars arranged side by side.
A long hole is formed in the longitudinal direction to arrange the reinforcing bars arranged vertically. Among them, the second reinforcing bar disposing hole 22 is provided with a sheath 23 which protrudes toward the outside of the side plate portion 10a. The sheath tube 23 is provided for holding the closing body 30 for closing the gap between the second reinforcing bar arrangement hole 22 and the reinforcing bar to prevent concrete leakage, and the upper frame 11 side and the lower frame body are provided. It can be divided into 12 sides.

The closing body 30 is made of hard rubber, and is of a vertical two-piece type which is closely mounted with the reinforcing bar 3 interposed therebetween as shown in FIG. Opposing contact surfaces 30a of the closure 30;
Holes 31 for accommodating the rebar 3 which are spaced apart from each other are formed on both sides of the sheath 30b.
The inside shape of the sheath tube 23 is such that no gap is formed in close contact with the inside of the sheath tube and the inside of the sheath tube 23 is not pushed out of the sheath tube 23 by the pressure of the poured concrete.

The procedure for manufacturing a precast plate using the mold constructed as described above will be described. First,
The upper frame 11 is moved upward with respect to all the frames 10, and the first and second rebar placement holes 21 and 22 are opened. Then, a reinforcing bar is disposed on the base surrounded by the lower frame 12, and the reinforcing bar 3 that is entangled with the reinforcing bar and protrudes from the end surface of the precast plate is provided on the first frame 12 side.
It is arranged in the second reinforcing bar arrangement holes 21 and 22. At this time, as shown in FIG. 3, a closing body 30 is previously attached to the reinforcing bar arranged in the second reinforcing bar arrangement hole 22. When the rebar has been arranged, the upper frame 11 is moved downward to be integrated with the lower frame 12, and after fixing both, the rebar is buried in the concrete casting space formed by the frame 10. Pouring concrete while doing. After a sufficient curing period, the upper frame 11 is moved upward again to open the first and second reinforcing bar arrangement holes 21 and 22, and the precast plate is pulled upward to be removed from the mold.

As described above, if a precast plate is manufactured using the formwork configured as described above, the frame 10 can be combined with the upper frame 11 and the lower frame 12 By opening the first and second reinforcing bar arrangement holes by dividing the reinforcing bar 3 into the above, the reinforcing bar 3 projecting from the end face of the precast plate can be easily arranged, so that the workability of the reinforcing bar assembling operation can be improved. . Further, when the precast plate is removed from the mold, the frame 10 is similarly divided so that the mold can be removed without removing the frame 10 from the base as in the related art. The time required for the demolding operation and the time required for reassembling the mold when manufacturing a precast plate by repeatedly using the mold can be reduced.

The upper frame 11 and the lower frame 12 are connected by a rotating hinge 13, and the upper frame 11 is separated from the lower frame 12 at a position where it is integrated with the lower frame 12 fixed to the base. Since the first and second rebar placement holes 21 and 22 are vertically divided and can be moved between open positions, the frame 10 can be easily divided and integrated into the original state. It is possible to improve the workability of the work of removing the precast plate and the work of reassembling the formwork.

In addition, by installing a closing member 30 for closing the gap with the reinforcing bar in the second reinforcing-bar disposing hole 22, it is possible to prevent concrete from leaking from the gap and to prevent extra concrete from adhering to the reinforcing bar 3. Prevention can make the precast plate beautiful.

Moreover, the closing body 30 is of a two-part type that is closely mounted with the reinforcing bar 3 interposed therebetween, and can be easily mounted on and removed from the reinforcing bar.

In this embodiment, the case where a rectangular precast plate is manufactured has been described. However, in the formwork of the present invention, a precast plate having a completely different shape is manufactured by changing the arrangement of the frame. It is possible.

[0023]

As described above, according to the working frame for producing a precast plate according to the first aspect, the frame for molding each end surface of the precast plate has the reinforcing bar projecting from the end surface of the precast plate. And has a two-part structure of an upper frame and a lower frame that divide the rebar arrangement hole up and down.When assembling the rebar, this frame is referred to as an upper frame. By dividing the rebar arrangement hole into the lower frame and the rebar arrangement hole, the arrangement of the rebar projecting from the end face of the precast plate can be easily performed, so that the workability of the rebar arrangement work can be improved. Furthermore, when removing the precast plate, the frame can be separated without removing the frame from the base as in the past by dividing the frame in the same way, so it is necessary for the removal work of the precast plate The time and time required for reassembling the form when manufacturing the precast plate by repeatedly using the form can be reduced, and the productivity of the precast plate can be improved.

According to the preform plate forming form described in the second aspect, the upper frame is formed integrally with the lower frame to form the reinforcing-bar arrangement hole, and the reinforcing bar is separated from the lower frame to form the reinforcing bar. It is supported so that it can move between the position where the arrangement hole is divided vertically and the frame can be easily divided and integrated into the original state, so that the precast plate is removed from the mold and the mold is reassembled. Workability of work can be improved.

According to the working form for producing a precast plate according to the third aspect of the present invention, the closing body that is closely mounted around the reinforcing bar projecting from the end face of the precast plate and closes the gap between the reinforcing bar and the reinforcing-bar arrangement hole is provided by the reinforcing bar. By installing in the placement hole, it is possible to prevent leakage of concrete from the reinforcement placement hole, prevent unnecessary concrete from adhering to the reinforcement, and finish the precast plate beautifully.

According to the working form for manufacturing a precast plate according to the fourth aspect of the present invention,
By making the closing body a split type, the closing body can be easily attached and detached, and the workability of arranging the reinforcing bar on the formwork and removing the precast plate is further improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a working mold for manufacturing a precast plate according to the present invention.

FIG. 2 is a perspective view showing a closing body.

FIG. 3 is an explanatory view showing a state where the closing body shown in FIG. 2 is attached to a reinforcing bar and used for manufacturing a precast plate.

FIG. 4 is a perspective view showing a precast plate to be manufactured by the mold of the present invention and a mold conventionally used to manufacture the precast plate.

FIG. 5 is an explanatory view showing a state of end face processing when a precast plate is manufactured using the mold shown in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Frame 11 Upper frame 12 Lower frame 13 Rotating hinge 20 Rebar arrangement hole 30 Closure

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasushi Fujita 2-15-3 Kiba, Koto-ku, Tokyo Inside SSC Precon Corporation (72) Inventor Takayuki Hatanaka 2-153 Kiba, Koto-ku, Tokyo SSC Precon Corporation

Claims (4)

[Claims] 1. A formwork for producing a precast plate in which a reinforcing bar is projected from an end face, wherein a plurality of frames for molding each end face of the precast plate are provided on a base for molding one side face of the precast plate. The frame has a reinforcing bar arrangement hole for disposing a reinforcing bar protruding from the end face of the precast plate, and has a two-part structure of an upper frame and a lower frame that divide the reinforcing bar arrangement hole up and down. A working form made of a precast plate. 2. The working form for a precast plate according to claim 1, wherein the upper frame is separated from a position where the upper frame is formed integrally with the lower frame to form the rebar arrangement hole. A working form made of a precast plate, wherein the working form is supported so as to be movable between a position where the reinforcing bar arrangement hole is vertically divided. 3. The working form for a precast plate according to claim 1, wherein the reinforcing bar is closely mounted around the reinforcing bar protruding from an end face of the precast plate, and the reinforcing bar and the reinforcing bar mounting hole. A working form made of a precast plate, characterized in that a closing body for closing a gap is provided. 4. The precast plate forming form according to claim 3, wherein the closing body is divided so as to be mounted with the reinforcing bar interposed therebetween. Formwork.