JPH0318561Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a formwork apparatus for use in constructing concrete slabs or concrete girders, particularly for forming their external surfaces.

[Prior Art] Conventionally, in order to construct a concrete floor slab or a concrete girder, a formwork is made of plywood, square timber, supports, etc. from the inner edge of the upper end of the established wall to the area corresponding to the inner floor surface or the inner surface of the girder. At the same time, construct a formwork using plywood, square timbers, separators, etc. on the outer edge of the upper end of the wall corresponding to the outer surface of the concrete slab or girder, place reinforcing bars in it, and fill it with concrete. After curing and demolishing each formwork, finish mortar is applied or tiles and
The necessary finishing touches were made.

[Problem that the idea aims to solve]

However, in addition to the fact that installing and dismantling the formwork takes time and lengthens the construction period, the formwork is disposable, making it uneconomical, and the construction cost also increases. Furthermore, when applying finishing mortar or laying tiles, the finishing mortar has to be applied or laid after the concrete has hardened, which has the disadvantage that it is likely to peel off. The purpose of the present invention is to eliminate these various conventional drawbacks.

[Means to solve the problem]

The configuration adopted by the present invention to achieve the above object is as follows. It is composed of a frame plate 1, a locking metal fitting 6, and a connecting plate 5'. The frame plate 1 is made of ceramic or fiber-reinforced concrete and has a substantially straight plate shape, and has parallel dovetail grooves 4 and 5 on the left and right edges of the frame plate 1 at two locations on the upper and lower sides of the back side. A locking portion 2 is provided at the lower end portion thereof and projects horizontally at right angles to the back side, and a through hole 3 for screwing is provided in the locking portion 2. The locking fitting 6 connects one end of a locking rod 9, also made of steel, running in a direction perpendicular to the fitting plate 7, which is elongated and made of steel and has the required width to tightly fit into the upper dovetail groove 4, to the fitting plate 7. A steel plate 11 having a through hole 10 for nailing is fixed to the other end of the locking rod 9. The connecting plate 5' is elongated and made of steel and has a required width to tightly fit into the lower dovetail groove 5.

[Effect]

Therefore, according to the present invention, the fitting plate of the locking fitting is fitted into the dovetail groove of the frame plate, and the locking rod is installed at the outer edge of the upper end of the wall, and is connected to the fitting plate. The steel plate at the other end is fixed to a formwork installed at a location corresponding to the inner floor surface or girder inner surface from the inner edge of the upper end of the wall, and the reinforcing bars are placed inside the formwork and concrete is filled. As the concrete hardens, the frame plate can be integrated with the reinforced concrete layer, and the frame plate itself can constitute the outer surface of the concrete slab.

【Example】

The illustrated embodiment will be described in more detail below. 1 is a ceramic frame board with a width of 154 mm and a height
It is approximately straight plate-shaped, 300 mm long and 23 mm thick, with the upper end bent diagonally to the back side, and the lower end part bent at right angles to the back side, with a locking part 2 protruding horizontally, and in the center thereof. While forming a through hole 3 for screwing,
Dovetail grooves 4 and 5 are formed in two places on the top and bottom of the back side, extending parallel to each other across the left and right edges. Reference numeral 6 denotes locking fittings for connecting four frame plates 1 at a time and fixing them to the formwork. This locking fitting 6 is constructed by welding a short steel plate 8 with a through hole formed on one side of a long and narrow steel fitting plate 7, and attaching one end of a steel locking rod 9 bent at right angles to the through hole. In addition to fitting and welding, a through hole 1 for nailing is provided at the other end of the locking rod 9.
A steel plate 11 on which 0's are arranged in a row is welded. The fitting plate 7 and the locking rod 9 are arranged in a substantially T-shape, with the fitting plate 7 being vertical and the steel plate 11 being horizontal. 4, and the locking rod 9 is slightly longer than the thickness of the ceramic block 12 constituting the wall. 5' has a width that fits tightly into the dovetail groove 5 and a length approximately three times that of the dovetail groove 5. Using this connecting plate 5', the frame plate 1 and the locking metal fittings 6, the ceramic block can be assembled. The case where a concrete floor slab is formed on the masonry wall 13 of the building constructed in step 12 will be described. First, plywood 14, 15 and square lumber 16 are placed in the area corresponding to the floor surface on the inside from the inner edge of the upper end of the wall 13.
A formwork 18 is provided by supports 17 and 17 . The plywood 14 stands up along the inner edge of the upper end of the wall 13 and has a height approximately equal to one ceramic block 12. Furthermore, the plywood 15 is horizontally stretched with its edge superimposed and fixed to the upper end of the plywood 14. Next, the frame plates 1 are arranged in rows on the outer edge of the upper end of the wall body 13 and framed by the formwork 18. To do this, the two frame plates 1, 1 are arranged with a joint interval, and the fitting plates 7 of the locking fittings 6 are tightly fitted into the dovetail grooves 4, 4, so that both side parts protrude left and right. These frame plates 1, 1 are placed on the outer edge of the upper end of the wall 13, and the bolts 19, which have been set in advance on the outer edge of the upper end of the wall 13, are inserted into the through holes 3, 3 of the locking parts 2, 2, and the nuts are tightened. At the same time, the steel plate 11 is applied to the plywood 15 of the formwork 18 and fixed by driving nails through the through holes 10. Then, on both sides of the frame plates 1, 1 established at the outer edge of the upper end of the wall body 13, another frame plate 1, 1 is installed.
When the dovetail grooves 4, 4 are fitted into the protruding portions of the fitting plate 7 and placed, and the nut 20 is tightened onto the bolt 19 inserted into the through hole 3 of the locking part 2. , by fitting the connecting plate 5' into each dovetail groove 5,
These four frame plates 1 are connected to the locking fitting 6 and the connecting plate 5'.
are connected to each other and fixed to the formwork 18. Further, in the same manner as in the case of the four frame plates 1 described above, a required number of rows of frame plates 1 are installed at the outer edge of the upper end of the wall body 13 facing the formwork 18 to form a frame. Note that a joint interval is provided between each of the frame plates 1, and a foamed plastic gasket (not shown) is fitted into the joint interval. Required reinforcing bars 21 are placed inside the framework and tightened at key points to the vertical bars 22 of the wall body 13 with wire, and at the same time, the upper end portions of each frame board 1 arranged in a row are provided with a substantially inversely concave cross section. Elongated metal restraining rods 23 are fitted and concrete is filled, and as the concrete hardens, each frame board 1 is integrated with a reinforced concrete layer (not shown), and after hardening, the formwork 18 is dismantled and the restraint is completed. Remove the rod 23 and packing and apply joint mortar. The outer surface of the concrete slab constructed in this way is a frame plate 1 integrated with the reinforced concrete layer.
The fitting plates 7 of the locking fittings 6 are tightly fitted into the dovetail grooves 4 of each frame plate 1, and the connecting plates 5' are tightly fitted into the dovetail grooves 5, so that four pieces are connected one after another. , and the voids remaining on the opening surfaces of the dovetail grooves 4 and 5, that is, the outer surfaces of the fitting plate 7 and the connecting plate 5' that are tightly fitted into the dovetail grooves 4 and 5, are filled with concrete and solidified. As a result, each frame plate 1 is firmly bonded to the reinforced concrete layer. In addition, in the above embodiment, a case was explained in which a concrete floor slab was constructed using a ceramic frame board, but the floor slab is not limited to ceramic and may be formed of fiber-reinforced concrete, and is not limited to a concrete slab. May be used to construct. In addition, although a case has been described in which the locking rod of the locking fitting is attached to the fitting plate through a steel plate, and this fitting plate is made long enough to connect four frame plates, the locking rod is not limited to this. may be attached directly to the mating plate, and the length of the mating plate is not limited to the four mentioned above.The length of the mating plate may be 1 to 3 or 5 or more, depending on the size and weight of the frame plate. If necessary, a plurality of locking rods may be attached to one fitting plate. As is clear from the above description, according to the present invention, a frame plate having a dovetail groove formed on the back surface, a locking fitting having a locking rod attached to a fitting plate that tightly fits into the dovetail groove, and a connecting plate are provided. Because of the simple structure, these frame plates and locking fittings are easy to manufacture and suitable for mass production. In addition, the locking rod can be attached to the frame plate by a simple operation of tightly fitting the fitting plate into the dovetail groove, and
There is no need to apply adhesives or screws for installation, making it highly efficient and economical. Since the locking metal fittings are fixed to the formwork, the frame plates that have already been set will not accidentally shift or fall during the work of setting it up, and they will also be safe when filling with concrete. Workability is good because the frame plate does not shift or fall. Furthermore, the outer surface of the constructed concrete slab or girder is constructed from the frame plate itself, which is consolidated and integrated with the reinforced concrete layer. Since it does not need to be demolished after curing, there is no need to do demolition work, and there is no need to separately perform finishing work such as laying tiles on the outside surface or applying finishing mortar, making it economical and short in construction time. Can be shortened. Furthermore, each frame plate has high durability because the fitting plate of the locking metal fitting is tightly fitted into the dovetail groove, and the concrete is filled and solidified to be firmly adhered to the reinforced concrete layer.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention.
The figure is a front view and a side view of the ceramic frame plate, and Figure 3 is 2
FIG. 4 is a perspective view showing a state in which a locking metal fitting is attached to the back side of a single frame plate, and FIG. . 1...Frame plate, 2...Locking portion, 3...Through hole,
4, 5... Dovetail groove, 5'... Connection plate, 6... Locking metal fitting, 7... Fitting plate, 9... Locking rod, 10... Through hole, 11... Steel plate.

Claims (1)

[Scope of utility model registration request] It is composed of a frame plate, locking metal fittings, and a connecting plate.The frame plate is made of ceramic or fiber-reinforced concrete and has an almost straight plate shape. A dovetail groove with an open end is dug in parallel, a locking part is provided at the lower end that projects horizontally at right angles to the back side, and a through hole for screwing is opened in the locking part, The locking fitting connects one end of the locking rod, which is also made of steel and runs perpendicularly to the elongated steel fitting plate with the required width to tightly fit into the upper dovetail groove, and A steel plate with a through hole for nailing is fixed to the other end of the stopper, and the connecting plate is an elongated steel plate having the required width to tightly fit into the lower dovetail groove. A formwork device for forming the external surface of a concrete slab or girder, characterized in that: