JP6914813B2 - Formwork lifting bracket - Google Patents

Description

The present invention relates to a formwork lifting metal fitting for lifting a formwork for placing concrete.

At construction sites such as condominiums and hospitals with large buildings, large formwork is used for concrete placement. When installing such a large formwork, the formwork is lifted by a wire rope and moved. Conventionally, when the formwork is lifted, a wire rope is directly wound around the thick horizontal end material constituting the formwork to lift the formwork. However, even if the wire rope is tightly wound around the thick material at the horizontal end, there is a risk that the formwork will be shaken from side to side during lifting and the wire rope will move, and the balance of the formwork will not be maintained. Therefore, the following prior art is disclosed regarding the metal fittings for lifting the formwork.

The hanging jig for building a formwork of Patent Document 1 is a technique in which a hook is provided with a hook piece, a thick horizontal end member is engaged with the hook piece, and a rope is passed through a plurality of arranged pipes. However, in this technique, since the hook pieces are engaged with each of the thick horizontal end members, the jig itself is large and heavy, resulting in poor workability.

The formwork hanging bracket of Patent Document 2 has an inverted U shape and is composed of a retaining rod having a stopper on the opening side, and is attached to a hanging hole at a required position away from the top end of the formwork. It is a technique to lift with a rope or the like. However, in this technique, since the metal fittings are attached to the holes made in the formwork, the load may act directly on the formwork to damage the formwork. If the formwork is damaged, the formwork cannot be reused.

Jitsufuku No. 6-7172 Japanese Unexamined Patent Publication No. 11-13573

The present invention has been made in view of the above-mentioned conventional problems, and while being relatively lightweight, the form can be safely lifted and can be easily attached to the form. The purpose is to provide metal fittings for lifting the formwork.

In order to achieve this purpose, it is a metal fitting that is attached between the weir plate and the horizontal end thick material to lift the formwork, and has the same width as the vertical end thick material attached to the weir plate. It is characterized in that it includes a shaped portion and a fixing portion for fixing the formwork binding metal fitting in the width direction of the plate-shaped portion, and a hooking portion for attaching a wire rope is formed on the upper portion of the plate-shaped portion. , Formwork lifting brackets are provided.

In this formwork lifting metal fitting, the plate-shaped portion may have a length that allows the horizontal end thick member to be received above and below the fixing portion. Further, a pair of the plate-shaped portions may be provided, and the fixing portion may be provided between the plate-shaped portions. In that case, the lower ends of the pair of plate-shaped portions may be connected to each other. Further, the fixing portion may have a tubular shape through which the bolts of the formwork fastening metal fittings are passed.

The formwork lifting metal fitting of the present invention is composed of a plate-shaped portion and a fixing part, and although it is relatively lightweight, it can be reliably lifted by using the formwork binding metal fitting. In addition, the formwork lifting metal fittings can be more firmly fixed by the plate-shaped portion having the same width as the vertical end thick lumber. It also prevents excessive tightening of the formwork binding bracket. Moreover, by providing a fixing portion for fixing the formwork binding metal fittings, the load load is distributed to other metal fittings via the thick horizontal end material, so that an excessive load is avoided on the formwork and the formwork is prevented. The formwork can be reused, and the formwork can be held securely by firmly fixing it to the formwork binding bracket with the fixing part, and the position of the wire rope does not shift during lifting. , You can work safely.

It is a perspective view of the metal fitting for lifting a formwork which concerns on embodiment of this invention. It is a front view of the formwork binding metal fittings. It is explanatory drawing of the state in which the formwork was lifted by using the formwork lifting metal fitting which concerns on embodiment of this invention. It is explanatory drawing which shows the state which attached the formwork binding metal fitting to a formwork. It is explanatory drawing which shows the state which fixed the formwork lifting metal fitting which concerns on embodiment of this invention to a formwork binding metal fitting, and the state which attached the wire rope to the formwork lifting metal fitting. It is a side view of the formwork lifting metal fitting which concerns on another embodiment of this invention. It is a side view of the formwork lifting metal fitting which concerns on another embodiment of this invention.

Hereinafter, the formwork lifting metal fitting 1 according to the embodiment of the present invention will be described with reference to the drawings. In the present specification and the drawings, elements having substantially the same functional configuration are designated by the same reference numerals, so that duplicate description will be omitted.

As shown in FIG. 1, the formwork lifting metal fitting 1 according to the embodiment of the present invention has a pair of plate-shaped portions 10 and 10 arranged in parallel at predetermined intervals. The plate-shaped portions 10 and 10 are formed by, for example, bending a steel plate in a V shape, and the lower ends of the plate-shaped portions 10 and 10 are connected by the bent portion 11.

The width L of the plate-shaped portions 10 and 10 is set to the same size as the vertical end thick lumber 31 attached to the weir plate 30 of the formwork 3. A hooking portion 12 for attaching the wire rope 5 is formed on the upper portions of the plate-shaped portions 10 and 10. In this embodiment, the hooking portion 12 has a round hole shape for passing the pin 52 of the shackle 51.

A fixing portion 15 for fixing the formwork fastening metal fitting 2 is provided between the plate-shaped portions 10 and 10. The fixing portion 15 has a tubular shape through which the bolt 21 of the formwork binding metal fitting 2 is passed. The fixing portion 15 is attached to the plate-shaped portions 10 and 10 by welding or the like. Notches 16 are formed on the side edges of the plate-shaped portions 10 and 10 at positions corresponding to the fixing portions 15.

As shown in FIG. 2, the formwork fastening metal fitting 2 has a bolt 21 having a brim portion 20 formed at its tip, a washer 22 through which the bolt 21 is passed, and a nut that holds the washer 22 by screwing to the bolt 21. It has 23. By screwing the nut 23, the washer 22 can be pressed toward the tip end side of the bolt 21 (in the direction approaching the brim portion 20). The washer 22 is formed with a recess 24 for receiving the lateral end thick member 32 when it is attached to the mold 3.

As shown in FIGS. It has an attached configuration. The width M of the vertical end thick member 31 (the length in the direction perpendicular to the formwork 3 and the length in the left-right direction in FIG. 4) is equal to the width L of the plate-shaped portion 10 of the formwork lifting metal fitting 1. .. As shown in FIG. 3, in this embodiment, formwork 3 in which four vertical end thick timbers 31 are attached in parallel to the back side of the weir plate 30 is combined in 6 rows horizontally, and each of them is vertically arranged. One large formwork 3'is formed by connecting the end thick timbers 31 with each other with nails or the like. Further, these six formwork 3s are more firmly connected to the horizontal end thick member 32 arranged on the back side of the vertical end thick member 31 by the formwork binding metal fitting 2.

The horizontal end thick lumber 32 is made of a pipe member made of steel, resin, etc., and is configured to have a length sufficient for connecting the six formwork 3 by arranging a plurality of horizontal end thick lumber 32s. .. As shown in FIG. 3, on the back side of the six formwork 3 arranged side by side, the horizontal end thick material 32 is arranged orthogonal to the vertical end thick material 31, and a plurality of formwork binding metal fittings 2 are attached. , The horizontal end thick material 32 is pressed against the back side of the vertical end thick material 31.

As shown in FIG. 4, a screw 36 is mounted inside the formwork bearing 35 arranged on the front side (the area side where concrete is placed) of the weir plate 30, and the tip of the screw 36 is It is passed through a through hole formed in the weir plate 30 and screwed into the tip surface of the bolt 21 of the formwork binding metal fitting 2 arranged on the back side of the weir plate 30. A screw hole for screwing the tip of the screw 36 is provided on the tip surface of the bolt 21 of the formwork fastening metal fitting 2. By tightening the screw 36, the weir plate 30 is firmly sandwiched between the brim 20 at the tip of the bolt 21 and the formwork support 35, and the bolt 21 of the formwork binding bracket 2 is placed on the back side of the formwork plate 30. It is installed vertically.

Then, the washer 22 is passed through the bolt 21 of the formwork binding metal fitting 2 so as to be pressed from above the horizontal end thick material 32 arranged on the back side of the vertical end thick material 31 (the back side of the form 3). Further, the nut 23 is attached to the bolt 21 from above (the back side of the mold 3). By tightening the nut 23, the horizontal end thick material 32 is pressed against the back side of the vertical end thick material 31 via the washer 22, and the vertical end thick material 31 and the horizontal end thick material 32 are assembled in a grid pattern. Is held at. Further, in the state where the vertical end thick material 31 and the horizontal end thick material 32 are assembled in a grid pattern in this way, the horizontal end thick material 32 is received by the recess 24 formed in the washer 22, and the horizontal end thick material 32 is received. Misalignment is prevented. In this embodiment, a total of 16 horizontal end thick materials 32 are used at 8 locations of 2 each, and 12 horizontal end thick materials 32 of 2 each (total 12 × 8 = 96 pieces) are molded. A large formwork 3'is configured by fixing with the frame binding bracket 2.

The formwork lifting metal fitting 1 according to the embodiment of the present invention is a large formwork 3'composed by horizontally connecting six formwork 3s by a horizontal end thick material 32 and a formwork binding metal fitting 2. It is attached to the upper two places of the large formwork 3'so that it can be lifted integrally. The two formwork lifting metal fittings 1 are attached to target positions near both upper sides of the large formwork 3'so that the large formwork 3'can be lifted in a well-balanced manner.

As shown in FIG. 3, the attachment of the formwork lifting metal fitting 1 to the large formwork 3'is an arbitrary pair of formwork binding metal fittings 2 attached to target positions near both upper sides of the large formwork 3'. It is done using. In this embodiment, the formwork lifting metal fittings 1 are attached to the second formwork binding metal fittings 2 from both outer sides of the 12 formwork binding metal fittings 2 arranged in the top row. There is.

That is, in the second formwork binding bracket 2 from both outer sides of the top row of the large formwork 3', as shown in FIG. 5, the bolts 21 vertically attached to the back side of the weir plate 30 Is passed through the fixing portion 15 of the formwork lifting metal fitting 1, so that the width direction of the plate-shaped portion 10 of the formwork lifting metal fitting 1 is perpendicular to the back surface of the weir plate 30 of the formwork 3. Has been done. Then, the plate-shaped portion 10 of the formwork lifting metal fitting 1 is sandwiched between the weir plate 30 and the horizontal end thick member 32, and the horizontal end thick member 32 is a washer 22 attached to the bolt 21 of the formwork binding metal fitting 2. Is held down by the nut 23. Then, by tightening the nut 23, the plate-shaped portion 10 of the formwork lifting metal fitting 1 is firmly held between the weir plate 30 and the lateral end thick member 32. Similarly, at the mounting position of the formwork lifting metal fitting 1, the lateral end thick member 32 is received by the recess 24 formed in the washer 22 to prevent the lateral end thick member 32 from being displaced.

A wire rope 5 is attached to each of the formwork lifting metal fittings 1 attached to the vicinity of both upper sides of the large formwork 3'. As shown in FIG. 5, a shackle 51 is attached to a loop portion 50 provided at the lower end of the wire rope 5, and a pin 52 of the shackle 51 is provided above the plate-shaped portion 10 of the formwork lifting metal fitting 1. The wire rope 5 is connected to the formwork lifting metal fitting 1 by passing it through the hooking portion 12 (round hole shape) and fixing it.

In this way, the vicinity of both upper sides of the large formwork 3'is lifted by the wire rope 5, and the large formwork 3'is moved to a designated place by a lifting machine such as a crane or a hoist to complete the concrete formwork. Then, the building is constructed by placing concrete in the concrete formwork. Further, after curing the concrete, the large formwork 3'is lifted again by the wire rope 5 and moved to, for example, a formwork installation location on the upper floor.

In the formwork lifting metal fitting 1 according to this embodiment, since the width L of the plate-shaped portions 10 and 10 is set to be equal to the width M of the vertical end thick material 31, the formwork lifting metal fitting 1 is attached at the mounting location. Also, the distance between the weir plate 30 and the horizontal end thick material 32 becomes equal to the width M of the vertical end thick material 31, and the distance between the weir plate 30 and the horizontal end thick material 32 extends over the entire length of the horizontal end thick material 32. Since they are kept equal, the formwork lifting metal fitting 1 can be fixed more firmly. Further, at the attachment location of the formwork lifting metal fitting 1, excessive tightening by the bolt 21 is avoided, damage to the formwork 3 (3') is prevented, and the formwork 3 (3') can be reused. Will be.

Further, the formwork lifting metal fitting 1 is firmly fixed in a state where the bolt 21 of the formwork binding metal fitting 2 is passed through the fixing portion 15 and the plate-shaped portion 10 is sandwiched between the weir plate 30 and the horizontal end thick member 32. Therefore, the formwork 3 (3') can be reliably held, and the position of the wire rope 5 does not shift during lifting, so that the work can be performed safely. Further, since the load load is distributed to other metal fittings via the horizontal end thick member 32, damage to the formwork 3 (3') is prevented, and the formwork 3 (3') can be reused. When the plate-shaped portion 10 of the formwork lifting metal fitting 1 is sandwiched between the weir plate 30 and the horizontal end thick lumber 32, as shown in FIG. 4, the brim portion 20 at the tip of the bolt 21 is a plate-shaped portion. It is received by the notch 16 provided on the side edge of 10. Therefore, the brim portion 20 does not protrude from the side edge of the plate-shaped portion 10, and the entire side edge of the plate-shaped portion 10 can be brought into close contact with the back surface of the weir plate 30 without a gap. As a result, by tightening the nut 23, the formwork lifting metal fitting 1 is firmly held, and the formwork 3 (3') can be stably lifted.

Further, since the formwork lifting metal fitting 1 according to this embodiment has a pair of plate-shaped portions 10 and 10 arranged in parallel at predetermined intervals, a bolt passed through the fixing portion 15 is provided. On both sides of 21, the pressing force from the washer 22 can be evenly received by the pair of plate-shaped portions 10 and 10, and the formwork lifting metal fitting 1 is stably fixed. Further, if the pair of plate-shaped portions 10 and 10 are formed in a V shape, the fixing portion 15 attached by welding or the like does not fall downward, and the load of the mold 3 (3') is surely applied. Can support. As shown in FIG. 5, in order to be able to evenly receive the pressing force from the horizontal end thick members 32 arranged two by two at the top and bottom of the bolt 21 passed through the fixing portion 15, as shown in FIG. It is desirable that the plate-shaped portions 10 and 10 have a length above and below the fixing portion 15 to a position where the lateral end thick member 32 can be received.

Although the formwork lifting metal fitting 1 according to the embodiment of the present invention has been described above as an example, the present invention is not limited to such an example. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the ideas described in the claims, which naturally belong to the technical scope of the present invention. It is understood as a thing.

In the formwork lifting metal fitting 1'shown in FIG. 6, the pair of plate-shaped portions 10 and 10 are separate members from each other, and the pair of plate-shaped portions 10 and 10 are fixed by the fixing portions 15 arranged between them. Has been done. Further, the formwork lifting metal fitting 1 ”shown in FIG. 7 is configured by a pair of plate-shaped portions 10 and 10 bending a steel plate or the like in a V shape, similarly to the formwork lifting metal fitting 1 shown in FIG. However, a gate member 55 is attached above the bent portion 11, and a fixing portion 15 through which the bolt 21 is passed is formed between the gate member 55 and the bent portion 11. The formwork shown in FIG. The lifting metal fittings 1'and the formwork lifting metal fittings 1'shown in FIG. 7 also belong to the technical scope of the present invention. Further, the number of plate-shaped portions 10 does not necessarily have to be one pair, and only one plate-shaped portion 10 may be provided.

The formwork lifting metal fitting of the present invention can be suitably used when suspending a formwork for placing concrete, and is particularly useful at a construction site such as a condominium or a hospital having a large building scale.

1 Formwork lifting bracket 2 Formwork binding bracket 3 Formwork 3'Large formwork 5 Wire rope 10 Plate-shaped part 11 Bent part 12 Hooking part 16 Notch 20 Brim part 21 Bolt 22 Washer 23 Nut 24 Recess 30 Weir Plate 31 Vertical end thick material 32 Horizontal end thick material 35 Formwork support 36 Screws 50 Loop part 51 Shackle 52 Pin 55 Gate member

Claims (5)

It is a metal fitting that is attached between the weir plate and the thick lumber at the horizontal end to lift the formwork.
It is provided with a plate-shaped portion having the same width as the vertical end thick lumber attached to the weir plate, and a fixing portion for fixing the formwork binding bracket in the width direction of the plate-shaped portion.
A metal fitting for lifting a formwork, characterized in that a hooking portion for attaching a wire rope is formed on the upper portion of the plate-shaped portion. The formwork lifting metal fitting according to claim 1, wherein the plate-shaped portion has a length capable of receiving a thick horizontal end member above and below the fixing portion. The metal fitting for lifting a formwork according to claim 1 or 2, wherein the pair of plate-shaped portions is provided, and the fixing portion is provided between the plate-shaped portions. The formwork lifting metal fitting according to claim 3, wherein the lower ends of the pair of plate-shaped portions are connected to each other. The formwork lifting metal fitting according to any one of claims 1 to 4, wherein the fixing portion has a tubular shape through which a bolt of the formwork binding metal fitting is passed.

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