JPS6137720Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a formwork device for constructing concrete structures such as cloth foundations and slope frames.

The formwork apparatus used for constructing this type of concrete structure has disadvantages in that it requires many members, has a complicated structure, and requires a lot of effort to assemble and dismantle the formwork. There has been a demand for simplification of the structure and handling, and as part of this effort, paperboard with water and pressure resistance has come to be used for formwork boards so that they can be disposable. The device cannot stably hold a paperboard form board, which is not strong, and this results in a problem in that the finished product of constructing a cloth foundation or the like deteriorates. In order to solve this problem, a formwork device as shown in Japanese Utility Model Publication No. 59-29078 has been proposed. However, when assembling this proposed conventional device, the transverse reinforcement and the formwork board are engaged, the horizontally long end pieces are positioned along the formwork board, and the wedge is inserted into the end piece. Since it has to be inserted into the through hole of the material and the hooked part of the transverse reinforcement, it is necessary to position and tighten while handling many unstable parts, which has the disadvantage that the work is troublesome and inefficient. be. Another drawback is that the hooked portions of the transverse reinforcement remain protruding from the outside of the concrete structure. Furthermore, with conventional equipment,
As assembly is troublesome as mentioned above, it is necessary to use a single arrangement of horizontally thick timbers.
Therefore, if the structure to be lathed becomes taller, the lower half of the form plate without side thick members will not be able to resist the lateral pressure of the concrete. Therefore, it cannot be applied unless the height of the lathe structure is a little high.

The present invention was proposed to solve the above-mentioned drawbacks of the conventional device, and has a notch groove on the contact surface side through which the horizontal thick material is passed, using a horizontal strip with a hook-shaped part and a receiving part at the end. To form a frame stably and firmly even if the formwork board is made of paperboard or the like by bringing a thick vertical member provided with a cutout groove and a thick horizontal member inserted horizontally into the notch groove into contact with the formwork board. To provide a formwork device which does not require the use of separators, has an extremely simple structure, can be assembled and dismantled in a short time, and has low turning costs.

Hereinafter, the present invention will be specifically explained based on embodiments shown in the drawings.

In Figures 1 and 2, 1 is a form board made by joining together the ends of water- and pressure-resistant paperboard, etc., in order to reduce weight and make it disposable. A hole 2 is provided.
Reference numeral 3 denotes a horizontal reinforcement to be buried in the concrete of the structure to be constructed, and at both ends there is a hook-shaped portion 4 formed by bending the horizontal reinforcement 3 and an inner end of the hook-shaped portion. A receiving portion 5 of the formwork plate 1 is formed by bending the frame plate 1, and the width between the left and right receiving portions 5 is designed to match the width of the fabric foundation to be constructed. In order to make the hook-shaped portion 4 of the horizontal reinforcement 3 that protrudes from the concrete wall surface after construction easy to break, a flat folded portion 6 is formed at the root of the hook-shaped portion 4. ing.

Note that the horizontal strips 3 may be independent horizontal strips as shown in FIG. The center portions of the horizontal stripes 3, 3 arranged above and below may be connected by a vertical strip 7 to form a set of two horizontal strips as shown in FIG. 3A.

3 is a thick vertical member made of a hollow member having a square cross section smaller than the hook-shaped portion 4 of the horizontal strip 3;
As shown in the figure, cutout grooves 9 are provided on the contact surface side of the formwork plate 1 at predetermined intervals, through which horizontal thick members 10 (to be described later) are passed upwardly and downwardly. The horizontal thick member 10 is formed of a hollow member having a rectangular cross section, and is inserted into a notched groove 9 provided in the vertical thick member 8 to be horizontally suspended.

Therefore, the vertical thick material 8 is inserted into the hook-shaped part 4 of the horizontal strip 3 which is projected outward from the through hole 2 of the form board 1, and the horizontal end is inserted into the notch groove 9 of the vertical thick material 8. If the thick timber 10 is inserted and hung horizontally, and the wedge 11 is driven into the hook-shaped part 4 on the back of the vertical thick timber 8, the inner surface of the formwork board 1 will have horizontal stripes 3.
are received by the receiving portions 5 to maintain a predetermined interval, and the thick vertical members 8 and the thick horizontal members 10 are brought into contact with the outer surface of the formwork plate 1 to form a formwork.

In addition, when the interval between the vertical thick pieces 8 and the vertical thick pieces 8 is long, in order to prevent the form plate 1 from warping, a through hole 12 is also provided on the side surface of the middle part of the form plate 1. , using a transverse strip 3' having a hook-shaped portion 4' shorter than the protruding length of the hook-shaped portion 4 of the transverse strip 3 shown in FIG. The formwork may be fixed by driving a wedge 11 into the hooked portion 4'. In addition, 13 in the figure is a holding fitting for fixing the upper edge of both formwork plates 1, 1 as necessary in order to prevent the upper end of the formwork plate 1 from deforming inwardly or outwardly. The upper edge of the form plate 1 is inserted between the clamping pieces 14 provided on the lower surface, and can be fixed with one touch.

FIG. 5 shows an example of a formwork device for constructing a cloth foundation. On the foundation surface 16 of the waste concrete 15 for constructing the cloth foundation, a formwork is placed in advance along the position where the formwork board 1 is to be installed. A clamping piece 17 that clamps the lower edge of the plate 1
A fixing metal fitting 18 provided with is fixed with nails 19, making it possible to easily position and assemble the form board 1. In addition, if there is a risk that the vertical thick material 8 may tilt due to the lateral pressure of the concrete 20 placed between the formwork plates 1 and 1, a pin 21 should be inserted into the upper side surface of the vertical thick material 8. The reinforcing portion 22 may be attached and reinforced.

Once the concrete 20 poured into the formwork is fixed, the wedge 11 is removed and the horizontal thick material 10 is pulled out from the notch groove 9 of the vertical thick material 8. The form plate 1 can be removed by pulling it out from inside the hook-shaped part 4.

FIG. 6 shows a sectional view of the fabric foundation constructed after removing the form board 1 in this manner.
The hooked part 4 of the horizontal reinforcement 3 exposed from the wall surface of the concrete 20 of the cloth foundation is broken off at the folding part 6 shown in FIG. Once this is removed, the cloth foundation will be completed as shown in Figure 7. In this case, on the wall surface of the concrete 20 of the cloth foundation, there are the receiving parts 5 of the horizontal reinforcements 3 and the fixing metal fittings 1.
There is a slight depression 23 where the clamping piece 17 of No. 8 was removed.
This may occur, so apply a final coat to this area if necessary.

In this embodiment, two cutout grooves 9 are provided above and below the abutting surface of the thick vertical material 8, but if the height of the formwork board 1 is high, the abutment surface of the thick vertical material 3 is Notch grooves 9 may be added to the contact surface, and horizontal thick members 10 may be additionally inserted into each of the notch grooves 9 as needed to allow horizontal suspension.
Furthermore, the folded portion 6 provided on the horizontal strip 3 is not limited to a flat shape; it may be made with a notch or a groove so that it can be easily cut off by bending it by hand or hitting it with a hammer. good. Furthermore, when the form board 1 is made of paperboard having water and pressure resistance, the paperboard is folded to form two layers, and only the connected ends are made into one sheet, and the connected ends of both paperboards are combined alternately. The connecting portion is made into two pieces, a through hole 2 is provided in the connecting portion, the hook-shaped portion 4 of the horizontal strip 3 is made to protrude outward, and a wedge 11 is used to connect the receiving portion 5 of the horizontal strip 3 and the thick vertical portion 8 of the horizontal strip 3. If the connecting portions are clamped, the connections can be made without gluing the connecting ends of the paperboard or connecting them via separate connecting fittings, etc., which is extremely convenient for assembling and dismantling the formwork.

As specifically explained above, the present invention forms a hook-shaped part and a receiving part and a folded part of the formwork board at the end of the horizontal reinforcement to be buried in concrete, and A vertical end that protrudes outward from the through hole provided in the plate to receive the inner surface of the formwork plate by a receiving part, and is placed in a hook-shaped part that protrudes outward of the formwork plate to abut against the formwork plate. Insert the thick material, and insert the horizontal thick material that contacts the formwork board into the notch grooves that are provided at vertical intervals on the contact surface of the vertical thick material and suspend it horizontally. Since the formwork plates can be fixed by driving a wedge into the hook-shaped part on the back of the formwork plate, (1) the gap between the formwork plates can be positioned to a specified dimension by the receiving part of the horizontal reinforcement embedded in the concrete. Therefore, there is no need to use a separate separator as in the conventional method, and the number of frame members can be reduced.

(2) When assembling the formwork device, the formwork can be erected at the beginning of the work by simply inserting the vertical thick material into the hook-shaped part of the horizontal reinforcement inserted into the through hole of the formwork plate, and then the formwork can be erected at the beginning of the work. It is possible to fix by inserting a thick horizontal material, placing it horizontally, and driving a wedge.In particular, it is extremely easy to install and remove the thick horizontal material, and the fixation of the formwork can be released by simply removing the wedge. , the formwork can be assembled and dismantled easily and in a short time.

(3) Since the formwork board is integrally abutted by vertical thick timbers framed vertically and horizontally and a plurality of horizontal thick timbers spaced vertically and horizontally, it is not possible to use stiff paperboard for the formwork board. Also, the formwork plate can be stably held, and a strong formwork can be created even when turning a tall structure, and the range of application as a simple formwork can be expanded.

(4) The structure of the formwork is extremely simple, each member can be manufactured at low cost, and the number of parts is small, making it extremely easy to handle.

It is possible to provide a practically excellent formwork device that has many advantages such as, and can be widely applied not only to constructing cloth foundations but also to various types of structures.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a formwork for a cloth foundation assembled using the formwork device of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a perspective view of horizontal reinforcement, and Fig. 4 is a vertical end thickness. A perspective view of the material, FIG. 5 is a sectional view showing the procedure for constructing a cloth foundation using the formwork device of the present invention, and FIG. 6 is a sectional view of the constructed cloth foundation after removing the formwork board. Figure 7 is a cross-sectional view of the completed cloth foundation. 1...Form board, 2...Through hole, 3, 3'...Horizontal strip, 4, 4'...Hooked part, 5...Receiving part, 6...Folded part, 7...Vertical strip, 8 ... Thick vertical material, 9... Notch groove, 10... Thick horizontal material, 11... Wedge, 12... Through hole, 13... Holding fitting, 14... Clamping piece, 15
...Discarded concrete, 16... Foundation surface, 17... Clamping piece,
18...Fixing metal fittings, 19...Nails, 20...Concrete, 21...Pins, 22...Reinforcement members, 23
...a hollow.

Claims (1)

[Scope of utility model registration request] A formwork plate having through-holes provided at predetermined intervals on its side surface, a hook-shaped part projecting from the through-hole of the formwork plate at an end, a receiving part that comes into contact with the inner surface of the formwork plate, and a hook-like part. A horizontal strip formed with a folded part for breaking the frame plate, and a plurality of horizontal strips with a square cross section to be inserted into the hook-shaped part protruding from the through hole of the form plate and to pass the thick horizontal end material on the side of the contact surface with the form plate. A vertical thick piece of wood having notch grooves spaced vertically apart from each other, a horizontal thick piece of wood having a rectangular cross section that is inserted into the notch grooves of the thick vertical piece and horizontally suspended, and a hook-shaped part of the horizontal strip and a vertical piece A formwork device characterized by a wedge that is driven between end pieces of lumber.