JP2002364170A - Form device and form construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability by easily removing a form without taking time, using the own weight of a beam form device, without needing to mechanically rotate the beam side outward for widening when removing the form. SOLUTION: A beam bottom form 9 is fixed onto a cross beam 4 at the upper part of beam form timbering 2 with a support type expansion post 1 built therein, and a beam side form 10 slidable outward on the cross beam 4 is fixed into a prescribed position by a wedge-shaped stop member 21. After placing concrete, the wedge-shaped stop member 21 is removed to slide the beam side form 10 outward on the cross beam 4, and the expansion post 1 is contracted to lower the cross beam 4. The beam bottom form 9 and beam side form 10 are lowered and removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a formwork device and a formwork method for constructing a reinforced concrete beam in a building having a rigid frame structure.

[0002]

2. Description of the Related Art Conventionally, when constructing a reinforced concrete beam, it is often the case that a reinforcing bar of the beam is first assembled and a beam formwork is assembled so as to surround the outer periphery thereof. This is because, as a beam form, a beam bottom form is supported by a shoring and a beam side form is tightly bound by a separator. According to this, after the beam form is formed, Since the separator is protruding, the reinforcing cage cannot be dropped into the formwork, and the work of tightening the separator is troublesome. Further work is difficult when tightening the separator after the reinforcing cage is arranged. At the same time, there are problems such as difficulty in dismantling the formwork.

On the other hand, conventionally, for example, a formwork apparatus as shown in FIG. 7 has been proposed, which is installed on tops of a pair of telescopic columns 31 and has a horizontal U-shape. A temporary beam 32 on which a receiving portion 35 is formed, a beam bottom formwork 36 is installed on the bottom 33 of the receiving portion 35, and a beam-side formwork 37 is hinged on both sides of the beam bottom formwork 36 by a hinge or the like. .

An elastic stopper such as a turnbuckle 38 is provided between the upper part of the beam-side formwork 37 and the side of the receiving part 35, and the upper part on both sides of the temporary beam 32 is provided with a thick material through the floor. Formwork 39 is installed. An auxiliary iron plate 40 is erected on the beam-side formwork 37 and the floor formwork 39.

In order to assemble the beam formwork, first, the column 31 is set below the beam construction position with the column 31 contracted, and the turnbuckle is set.
By operating 38, the beam-side formwork 37 is set at a predetermined position. Next, the column 31 is extended to set the formwork device to a predetermined height.

Further, an auxiliary iron plate 40 is attached to form a beam-side formwork.
The gap between 37 and the floor formwork 39 is closed, and then reinforcement is laid, and concrete for the floor and beams is cast. After the concrete is hardened, the turnbuckle 38 is operated to open the beam-side formwork 37, peel off and remove the mold, lower the support column 31, lower the formwork apparatus below the beam, and reposition the concrete.

According to the beam formwork apparatus shown in FIG. 7, the beam bottom formwork 36 and the beam-side formwork 37 are restrained from the outside by the bottom of the receiving portion 35 and the turnbuckle 38. Is unnecessary, and the reinforcing cage for beam arrangement can be inserted into the formwork even after the formwork is installed, and the formwork can be easily assembled and removed.

[0008]

In the conventional example shown in FIG. 7, in order to open and remove the beam-side formwork 37, the turnbuckle 38 is operated as described above to mechanically turn the beam side outward. It had to be rotated and spread out, which was troublesome and the workability was not good.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned disadvantages of the prior art, and it is not necessary to mechanically rotate the beam side outward to expand it when removing the mold. An object of the present invention is to provide a formwork apparatus and a formwork method which can be easily removed from the mold without the need for the method and can improve workability.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides, as an apparatus, firstly, a beam bottom formwork on a horizontal beam above a beam formwork support incorporating a support type telescopic strut. And fixing the beam-side formwork on the horizontal beam so as to be slidable outward, and fixing the beam-side formwork on the horizontal beam at a predetermined position with a detachable wedge-shaped stopper. Is what you do.

Second, the beam-side formwork is supported by a cross member that slides on the cross beam and a vertical member that is combined with the cross member. Is spanned between the horizontal member and the vertical member, and the vertical member is axially attached to the horizontal member so that the mounting angle can be freely adjusted.

Third, as a construction method, a beam bottom formwork is fixed on a horizontal beam above a beam formwork supporting structure incorporating a support type telescopic column, and a beam slidable outward on the horizontal beam. The side formwork is fixed at a predetermined position with a wedge-shaped stop member, and after concrete casting, the wedge-shaped stop member is removed, the beam-side formwork is slid outward on the horizontal beam, and the telescopic struts are contracted. The gist of the present invention is to lower the lateral beam and lower the beam bottom formwork and the beam side formwork to remove the form.

According to the first and third aspects of the present invention, the telescopic strut is extended and set at a predetermined height position, and the beam-side form is slid on the horizontal beam and set at a predetermined position. When the wedge-shaped stopper is attached, the beam bottom formwork and the beam-side formwork are arranged at predetermined positions. Then, when removing the mold, simply removing the wedge-shaped stopper member and removing the pressure on the beam side, if the telescopic strut is contracted and the horizontal beam is lowered, the entire beam form device is lowered by its own weight. .

According to the second aspect of the present invention, in addition to the above operation, the angle of attachment of the vertical member can be arbitrarily adjusted by operating a retractable stopper such as a turnbuckle. When setting, the angle can be easily adjusted.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view of a beam formwork apparatus according to an embodiment of the present invention before casting concrete, and FIG. 2 is a side view of the same after concrete placement. The beam formwork apparatus of the present invention is a support-type telescopic strut. 1 is supported by a beam form support 2 incorporating 1.

The telescopic strut 1 is composed of a combination of upper and lower sheath pipes, and one of the sheath tubes is slidably inserted into the other sheath tube. The sheath tube is made of, for example, a round steel pipe and will be constructed. Are arranged in parallel at intervals slightly wider than the width of the beam, and a plurality of beams are erected at appropriate intervals in the length direction of the beam.

A horizontal beam 4 made of a joist is disposed on the upper part of the telescopic strut 1 via a large-scale pull 3 at an appropriate interval in a direction perpendicular to the length direction of the beam to be constructed. FIG.
As shown also in FIG. 5, the large beam 3 and the horizontal beam 4 are combined in a direction orthogonal to each other. Fixed. In this case, a pair of the large pullers 3 and the lateral beams 4 are arranged in parallel with a space as long as a screw portion of the bolt can be inserted, and the T bolt 6 is also disposed between the two large pullers 3 and 3. The tip is screwed into the horizontal beam 4 through the gap.

Then, on the beam 4 made of joist,
The beam bottom formwork 9 is fixed with a countersunk bolt 8 via a crosspiece 7 extending in a direction orthogonal to this. The beam bottom formwork 9 is formed of, for example, a control panel.

A beam-side formwork 10 made of a control panel is arranged on both left and right sides of the beam-bottom formwork 9. The beam-side formwork 10 has a plurality of vertical members 13 formed by square pipes fixed at appropriate intervals by flathead bolts 12 via horizontal flap members 11 which are vertically parallel to the outside thereof.
Is rotatably connected to a horizontal member 15 slidable on the horizontal beam 4 by a connecting hardware 14.

The cross member 15 is fastened and fixed on the cross beam 4 with bolts 16. The bolt 16 is attached to a nut 17 fixed to the upper portion of the cross member 15 by welding, from the lower side of the cross beam 4. It was inserted into the gap between the pair of transverse beams 4 and 4. In the figure
Numeral 18 denotes a corner saw for fixing the bolt 16. This allows
The vertical member 13, the horizontal member 15, and the beam-side form 10 fixed to the vertical member 13 are movably mounted on the horizontal beam 4.

An angle member 19 is fixed to the outer end of the horizontal member 15 with bolts, and the upper outer end of the horizontal beam 4 is an angle member having a rectangular cross section which serves as a receiving portion for a wedge-shaped stopper 21 described later. Fix 20 with bolts. And angle wood 1
A wedge-shaped stop member 21 for fixing the beam-side formwork 10 at a predetermined position is removably inserted into the gap between 9 and 20.

Further, as shown in the plan view of FIG. 5, a stretchable stopper 22 such as a turnbuckle is obliquely stretched between the horizontal member 15 and the vertical member 13 so that the vertical member 13 is connected to the horizontal member. Further fixed to 15. In this case, as shown in FIG. 3, if the stopper 22 is attached using an attachment 23 such as a hinge, the vertical member 13 can be axially attached to the horizontal member 15 so that the mounting angle can be freely adjusted. The adjustable angle is about 10 degrees.

Next, a formwork method using such a formwork apparatus will be described. As shown in FIG.
The formwork apparatus of the present invention is set therebetween, and the floor half PC board 25 is laid. When installing the formwork device, the telescopic strut 1 is set to a position below the beam construction position in a contracted state, and then the telescopic strut 1 is extended to set the beam bottom formwork 9 to a predetermined height.

In this state, a fastener using a turnbuckle
Operate 22 to adjust the angle according to the beam-side formwork 10. Since the stopper 22 is attached by the attachment 23 such as a hinge, the vertical member 13 can be freely rotated through the connection 14, thereby enabling the angle adjustment. At the same time, the beam-side fixing bolt 16 is tightened, and at the same time, a wedge-shaped stopper 21 is inserted into the gap between the angle members 19 and 20 to fix the beam-side formwork 10 at a predetermined position.

The laying of the floor half PC board 25 is performed by placing the floor half PC board 25 on the beam-side formwork 10 as shown in FIG. At this time, as shown in FIG. 4, the main rope support 26 can be inserted into the upper part of the vertical member 13 made of a square pipe, and a handrail 27 made of a round steel pipe can be stretched between the main rope supports 26 to ensure safety. The floor half PC board 25 can be used as a work scaffold thereafter.

Next, the reinforcing bars are arranged and concrete for the floor and beams is cast. After concrete hardening, to remove the beam formwork device, first, as shown in FIG. 2, the wedge-shaped stopper member 21 is removed, and then the fixing bolt 16 on the beam side is loosened to remove the beam on the cross beam 4. If the horizontal member 15 is slid outward and the beam-side formwork 10 is moved to remove the pressure on the beam-side and the telescopic strut 1 is contracted, the beam-side formwork 10 and the beam-bottom formwork 9 by the control panel are under their own weight. It descends following the contraction of the telescopic strut 1. In this case, since the beam-side formwork 10 is formed of a control panel, the surface is smooth, and if the pressure on the beam side is removed, it is easily separated from the concrete.

Therefore, as shown in FIG. 6, when the entire formwork apparatus is lowered to a level at which the formwork apparatus comes off from the beam, a root bar 28 made of a round steel pipe is attached between the telescopic columns 1, and the entire formwork apparatus is moved to the next position. Move to the point of use.

[0028]

As described above, according to the formwork apparatus and the formwork method of the present invention, it is not necessary to mechanically rotate the beam side outward when expanding the form, and the wedge-shaped stopper member is removed. This makes it possible to easily remove the mold using the own weight of the beam formwork device, and to improve the operability without the need for labor.

[Brief description of the drawings]

FIG. 1 is a side view of a formwork apparatus and a formwork method according to an embodiment of the present invention before concrete casting.

FIG. 2 is a side view after concrete casting showing an embodiment of the formwork apparatus and the formwork method of the present invention.

FIG. 3 is a side view of a formwork apparatus and a formwork method according to an embodiment of the present invention before concrete is cast when a stop member is attached so as to be adjustable in angle.

FIG. 4 is a front view showing an embodiment of the formwork apparatus and the formwork method of the present invention.

FIG. 5 is a plan view showing an embodiment of the formwork apparatus and the formwork method of the present invention.

FIG. 6 is a front view of the form device according to the embodiment of the present invention in a state in which the form device is lowered.

FIG. 7 is a side view of a conventional mold device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Telescopic strut 2 ... Beam form support 3 ... Large pulling 4 ... Side beam 5 ... Plate metal plate 6 ... T bolt 7 ... Pier 8 ... Plate head bolt 9 ... Beam bottom form 10 ... Beam side form 11 ... Horizontal flap material 12… Counterhead bolt 13… Vertical material 14… Connecting hardware 15… Horizontal material 16… Bolt 17… Nut 18… Square edge 19… Angle material 20… Angle material 21… Stopping member 22… Stopping member 23… Mounting bracket 24 ... Pillar 25 ... Floor half PC board 26 ... Prop rope support 27 ... Handrail 28 ... Roots 31 ... Prop 32 ... Temporary beam 33 ... Bottom 34 ... Side 35 ... Receiving part 36 ... Beam bottom form 37 ... Beam side Formwork 38 ... Turnbuckle 39 ... Floor formwork 40 ... Auxiliary iron plate

Claims (3)

[Claims] 1. A beam bottom formwork is fixed on a horizontal beam on an upper part of a beam formwork support incorporating a telescopic support column of a support type, and a beam side formwork is slidably set outward on the horizontal beam. A beam forming apparatus characterized in that the beam-side frame is fixed to a predetermined position on a horizontal beam with a detachable wedge-shaped stopper. 2. The beam-side formwork is supported by a cross member that slides on a cross beam and a vertical member combined with the cross member, and a stretchable stop fitting such as a turnbuckle is attached to the fitting by a hinge or the like. 2. The formwork device according to claim 1, wherein the form member is spanned between a cross member and a vertical member, and the vertical member is axially attached to the cross member so as to be adjustable in mounting angle. 3. A beam bottom formwork fixed on a horizontal beam above a beam formwork support incorporating a support type telescopic strut, and a wedge-shaped beam side formwork slidable outward on the horizontal beam. After the concrete is cast, the wedge-shaped stop member is removed and the beam-side formwork is slid outward on the horizontal beam, and the telescopic struts are contracted to lower the horizontal beam. A formwork method characterized by lowering the beam bottom formwork and the beam side formwork and demolding.