JPH048504A - Concrete shuttering device for fixing of hook - Google Patents

Abstract

PURPOSE:To make positioning of a hook precise by enabling formation of a circumferential space of a hook part on a top side of a concrete plate, by a method wherein the title device is provided with a concrete shuttering plate where the side is arranged vertically to a base plate, space shaping parts which formed a space and a press member which fills into a spaital part and posotions the hook. CONSTITUTION:A concrete shuttering plate 32 is fitted to a base 31 by standing up and a space shaping parts 33 are fitted to the surface of the inside of the concrete shuttering plate 32. An opening part 337 is opened between a lower wall 331 and fitting wall 332 of the space shaping parts 33, a hook 37 is, for example, U-shaped and a bent head part is positioned at the opening part 337. The hook 37 is pressed by a press member 38 and the press member 38 is constituted into a form filling into a space X of the space shaping parts 33. Simultaneously with this the press member 38 is formed of synthetic resin having flexibility so that the same coincides with a form of the hook. When the press member 38 is fitted to the space X, the same is stuck to the inside of the space shaping parts 33 and the hook 37 can be positioned by holding the hook 37. Then at the time of placemenet of the concrete, concrete milk is prevented from entering into the space of the space shaping parts 33.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a formwork device for manufacturing a concrete plate (plate), and particularly to a formwork device for forming a hook portion of a concrete plate. The present invention relates to a formwork device for hook fixing that is effective for.

(Prior Art) In recent years, many buildings are assembled using secondary concrete products. Secondary concrete products include wall boards, floor boards, and flat roof boards. These concrete plates are usually manufactured at a factory or construction site by placing a formwork on top of a base plate and pouring concrete inside the formwork.

By the way, since concrete plates are heavy (at least 1 or more), a crane is used for demolding, moving, transporting, etc. For this purpose, the concrete plate is
Usually, a metal hook is attached so that the hook of the crane can be locked. In order to integrally fix the hooks to the concrete plate, the shape of the formwork is devised, but this may cause damage to the concrete plate when demolding the concrete, or the hooks may not be positioned accurately. First, after commercialization, a problem arises in that it cannot be engaged with a crane hook.

FIG. 5 is an explanatory diagram of a conventional formwork apparatus for shaping a concrete plate having hooks. First, the same figure (A)
As shown in FIG. 2, a form plate 12 is attached to the upper surface of the base 11 with its side surfaces vertically erected. Form board 1
A box 13 for forming a space is arranged on the inner surface side of the box 2 . This box 13 is in contact with the formwork board 12 and the base 11, and hooks 1 are provided on the wall opposite to the formwork board 12.
An opening 14 for arranging the holder 5 is formed.

The hook 15 is U-shaped and its curved head is connected to the opening 1
4 and placed inside the pock 13, with the feet located outside.

In the above state, a part of the opening 14, that is, the hook 1
The space between the legs of the box 13 is closed by a plug member to prevent concrete milk from entering the inside of the box 13.

FIG. 5(B) shows the state in which concrete has been poured. Here, the foot portion of the hook 15 will be buried inside the concrete. When concrete 16 or more hardens,
Form board 12 is removed.

At the same time, a box 13 fixed to the formwork board 12
Payment is made. In this demolding operation, the removal direction of the form plate 12 is limited, and it is necessary to remove it horizontally in the direction of the head of the hook 15.

FIG. 5(C) shows the concrete plate 16 after being demolded,
This is the state seen after the turning operation has been performed, and FIG. 5(D) is a view of the hook 15 seen from the head side. That is, hook 1
The space in section 5 is in a state facing upward, and if it is not kept in this state, the hook of the crane will be locked to the hook 15,
It cannot be transported or moved.

(Problems to be Solved by the Invention) According to the above-described conventional formwork device, the fixing location of the hook 14 is limited to the lower side as shown in FIGS. 5(A) and 5(B). For this reason, after demolding, when transporting or moving the mold, it is necessary to turn it over and direct the hook 15 portion upward, as shown in FIGS. However, this work is time-consuming and labor-intensive because the weight of the concrete plate is very large. Furthermore, since the strength of the concrete plate immediately after demolding is low, considerable care is required in order to turn it over and move the plate to a storage location without damage, as damage often occurs.

Furthermore, when removing the formwork, work efficiency is poor because the direction in which the formwork plate 12 can be removed is limited as described above at the hook portion.

Next, as shown in FIG. 5(A), the hooks 15 are arranged and concrete is poured, and the structure is such that the hooks can be easily moved during concrete pouring.

In other words, the part that holds the hook 15 is located at the opening 14 and has a small contact area with the hook 15, so the hook 15 may move due to vibrations, etc., and when you look at the finished concrete plate, the hook 15 will be in the predetermined position. There are cases where it is not. The reality is that it takes time and effort to engage the hook of the crane.

Therefore, with this invention, the space around the hook part can be formed on the upper surface side of the concrete plate, the work of removing the formwork plate is easy, and the positioning of the hook can be accurately achieved by engaging with the holding plate. The purpose of the present invention is to provide a formwork device for fixing hooks.

[Structure of the Invention (Means for Solving the Problems) This invention provides a formwork board for producing a concrete board whose side surfaces are arranged perpendicularly to a base board, a lower wall, A space shaping component forming a space in a portion surrounded by a wall that stands up from the lower wall and is attached to the formwork board, and a side wall that has left, right, and back sides that are attached to the attachment wall, and the mounting of the space shaping component. The space shaping component is placed on the concrete pouring side of the formwork plate so that the upper side of the wall coincides with the upper side of the formwork plate, and the lower side of the lower wall forms a gap with the base plate. means for attaching to a side surface of the space shaping component; an opening provided between the lower wall and the mounting wall through which the head of the hook member can be inserted; and a generally U-shaped hook head inserted through the opening; and a pressing member that is arranged to fill the space and positions the hook when the hook is inserted from the space.

(Function) When the formwork is removed by the above means, the hook part will
Appears on the top surface of the concrete plate. Therefore, the hook of the crane can be immediately locked to the hook.

In addition, since the holding members and space shaping parts are attached from the top side, there is a degree of freedom in the removal direction when demolding, allowing smooth demolding work without damaging the concrete plate. can. Furthermore, the holding member is disposed in close contact with the inside of the space shaping component, and a large contact area with the foot of the hook can be obtained, thereby stabilizing the positioning of the hook.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

31 is a base, to which a form plate 32 is attached in an upright manner. The frame plate 32 has, for example, a U-shaped cross section. One of the U-shaped leg pieces is used for fixing to the base 31. A space shaping component 33 is attached to the inner surface (concrete pouring side) of the form board 32.

This space shaping component 33 is attached to a lower wall 331 and a wall 33 that stands up from the lower wall 331 and faces the formwork board 31.
2, this installation is done on the left and right sides of the wall 332 and the lower wall 331.
The lower wall 331 has left and right side walls 334 and 335 connected to each other, and a space X is formed in a portion surrounded by the lower wall 331, the mounting wall 332, and the left and right side walls. Further, for installation, for example, bolts 336 are fixed to the wall 332 so as to protrude from a plurality of places, and holes 321 are formed at a plurality of places in the opposing form board 32.
It corresponds to

Therefore, when attaching or fixing the space shaping part 33 to the frame plate 32, it can be fixed by inserting the bolts 336 into the corresponding holes 32 and tightening them with nuts.

In this case, the height position of the space shaping part 33 is such that the upper side of the wall 332 coincides with the upper side of the frame plate 32, and the lower side of the lower wall 331 is relative to the base 31. It is set to form a gap.

Furthermore, the lower wall 331 of the space shaping component 33 and the mounting are attached to the wall 3.
32, there is an opening 337 through which the head of the hook 37 can be inserted. Figure 2 (A) and Figure 2 (C
) shows the space shaping component 33 taken out.

The hook 37 is, for example, U-shaped, and its curved head is positioned in the opening 337 as shown in FIG. 2(B). Moreover, the foot portion of the hook 37 comes into close contact with the upper surface of the lower wall 331 of the space shaping component 33 due to its own weight.

As shown in FIG. 2, with the hook 37 placed,
This hook 37 is held down by a holding member 38. This pressing member 38 is configured to fill the space X of the space shaping component 33, and is also made of synthetic resin such as rubber or styrene foam with some flexibility to match the shape of the hook. There is. Therefore, when this pressing member 38 is installed in the space X, it comes into close contact with the inside of the space shaping component 33, and the hook 37 can be stably held and positioned. Further, when concrete is placed in the formwork device, concrete milk can be prevented from entering the space of the space shaping member 33.

Furthermore, the shape of the space X of the space shaping component 33 is
As shown in Figure (B), when the presser member 38 is inserted, the rear width is narrowed so that it does not retreat. For this reason, even if there is vibration during the formwork erection work with the presser member 38 in place, the fixing effect of the presser member 38 is stable, and the position of the hook 37 will not go out of order. Note that various embodiments are possible in terms of means and shapes for attaching the frame plate 32 and the space shaping component 33, and the attachment is not limited to what is shown in the drawings.

The space shaping component 33 and the holding member 38 are integrated, for example, by a fixing plate 40, so that the holding member 38 does not come off during concrete pouring. The fixing plate 40 has a plurality of holes, and bolts are inserted through the holes and tightened into the screw holes of the space shaping component 33 and the holding member 38, thereby integrating the two.

FIG. 3 shows a state in which concrete plates 51 and 52 having hook portions as described above are arranged. When arranging the concrete plates 51, 52, their edges must be in close contact with each other. In this case, it is necessary to attach the hook so that it does not get in the way. Therefore, the head of the hook is positioned as also shown in FIG. 2(B) and set so that it does not protrude from the end of the concrete plate. Furthermore, the hook portions 53 and 54 have a cross-sectional shape, but this will occur if the concrete plates 51 and 52 are arranged as shown in Fig. 3 and mortar for adhesion is filled at the joints. This is to prevent leakage of 53 and 54.

Furthermore, the hook portion 53.54 is connected to the concrete plate 51.5.
This is to prevent it from being seen from the lower side of 2 (which will become the ceiling if assembled at the construction site).

FIG. 4 shows a cross section of the space shaping component 33 attached to the formwork plate 33. Here, the lower wall 331 of the space shaping component 33 faces the base 31 with a distance M therebetween. However, in order to facilitate concrete placement and demolding, this distance M increases as the distance from the formwork plate 33 increases. In other words, the Ml shown in the diagram
It increases from M2 to M2. Ml is set to ensure a distance from the hook 37. This is because if this distance is not sufficiently secured, the crane hook will not be able to pass through when engaging the crane hook.

Furthermore, it is better to locate the hook 37 at the center of the thickness of the concrete plate in terms of balance during lifting.

Originally, reinforcing bars are preferable in order to maintain the strength of being buried under the concrete plate. For this reason, if the hook 37 is placed too far on the lower surface side, the above-mentioned opening cannot be secured.

However, if L is maintained as a whole, the concrete thickness becomes thinner and the strength becomes smaller.

Therefore, by setting the thickness like Ml and M2,
The hooks can be easily engaged and the strength of concrete can be achieved.

[Effects of the Invention] As explained above, according to the present invention, when manufacturing and handling heavy concrete plates, the space around the hook portion can be formed on the upper surface side of the concrete plate, making handling easier. Moreover, the work of removing the formwork plate is easy, and the positioning of the hook can be made accurate.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing an embodiment of the present invention, Fig. 2 is a view showing the space shaping parts of Fig. 1, Fig. 3 is a view showing an example of assembling concrete plates, and Fig. 4 is a view of the invention. FIG. 5 is an explanatory view showing an example of a conventional formwork device. 32... Form board, 33... Space shaping parts, 37...
Hook, 38...pressing member. Applicant's agent Patent attorney Takehiko Suzue (A) Figures (C) (D)

Claims (1)

[Scope of Claims] A formwork plate for producing a concrete plate, the side surface of which is arranged perpendicular to the base plate; a lower wall; a space shaping component that forms a space in a portion surrounded by a wall to be mounted and a side wall having left, right and rear sides attached to the mounting wall; and means for attaching the space shaping component to the side surface of the formwork plate on the concrete pouring side so that the lower surface side of the lower wall forms a gap with the base plate; an opening provided between the lower wall and the mounting wall through which the head of the hook member can be inserted; and the head of the approximately U-shaped hook inserted from the space through the opening; 1. A formwork device for fixing a hook, comprising: a pressing member disposed so as to fill the area of the hook and positioning the hook.