JPH0427620Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Fields>> The present invention relates to a box formwork for forming a box using concrete, and particularly relates to the inner frame thereof.

≪Prior art≫ As illustrated in Fig. 5, the formwork of a box consists of an inner frame a and an outer frame b. In the case of outer frame b, it acts outward.

Therefore, in the conventional box formwork, in order to prevent the frame plates c..., e... of the inner frame a and the outer frame b from being bent inward and outward due to concrete pouring pressure, In the inner frame a, as illustrated in Figs. 5 to 7, the frame plates c... are reinforced from the inside by incorporating cross beams d... in the biaxial directions, and in the outer frame b, As illustrated in FIG. 5, the frame plates e are reinforced from the outside by assembling horizontal beams d through vertical beams f.

≪Problem that the invention attempts to solve≫ However, according to the above-mentioned conventional box formwork,
For the outer side d, by having sufficient space on the outer circumferential side, assembly and disassembly can be performed with good work efficiency, but for the inner frame a, in the narrow inside, the frame plate c ..., the cross beam d... must be assembled and disassembled, resulting in poor workability and efficiency.

Conventionally, when the frame plate c of the inner frame a has a flat plate shape, the frame plates c and c are assembled with their end surfaces and inner surfaces butted against each other, as shown in Fig. 5. Or, as shown in Fig. 6, the inner surfaces of the left and right frame plates c, c are brought into contact with the end surfaces of the front and rear frame plates c, c, and the frame plates c, c... are assembled together. I have to.

However, in the case of the former shown in Fig. 5, when disassembling the inner frame a after the concrete hardens, first the cross beam d...
... is removed, and then the frame plates c, c... are removed inwardly, but since the frame plates c, c are overlapped at their ends, the frame plates c,
The current situation is that the removal work of c... is not easy and requires a great deal of effort and time.

On the other hand, in the case shown in Fig. 6, after disassembling and removing the cross beam d..., and removing the front and rear frame plates c, c by tilting them inward as shown by the arrow h in the figure, the left and right frame plates c, c are removed.
will be removed inward, but the left and right frame plates c,
c is receiving the concrete placing pressure inward, and in this state it is crimped against the end faces of the front and rear frame plates c and c, so tilt the front and rear frame plates c and c inward. This is not an easy task, and as a result, a great deal of effort and time is spent on the disassembly work.

In addition, as a conventional example, as shown in FIG. 7, the frame plate c... is approximately L-shaped in plan, and a notch c' is formed at the end thereof in a groove shape. There is also known a device in which the device is removed in the direction of arrow i.

However, in this case, the two perpendicular faces of frame plate c,
Because it is in close contact with hardened concrete,
If the frame plate c is even slightly tilted from its normal position, not only will it be difficult to disassemble it, but the tip of the notch c' must be accurately butted against the end face of the adjacent frame plate c. High assembly accuracy is required, and there are also problems such as poor workability.

In view of the above-mentioned problems with the conventional box formwork, the present invention has been developed to improve the assembly and disassembly of the inner frame.
Easy operation makes it easy to perform and has good workability, and the assembly is made with high precision.
The purpose is to make it possible to create a rigid structure.

≪Means for Solving the Problems≫ In order to achieve the above-mentioned object, the present invention provides a formwork for a box consisting of an inner frame and an outer frame arranged at a required interval, in which the inner frame is A required plurality of frame boards each having a plurality of vertically installed inner crosspieces and having beam holders provided at least on the upper and lower parts thereof, and the ends of each of the frame boards. A projecting piece is provided vertically from the outer corner so as to be sandwiched between the parts and can be freely pulled out inwardly, and beam holders are provided on at least the upper and lower parts of the inner part at an assembly angle between the frame plates. A support beam formed in the form of a frame and formed so that it can be freely connected to and detached from each of the frame plates and the respective beam holders of each corner pillar so that it can be erected on each corner pillar. The idea is to provide a formwork.

≪Operation≫ To assemble the inner frame, first set up the square columns at predetermined intervals with their beam holders facing inward, then insert the ends of each frame plate into each square column. It is overlapped with the outer surface, and its end face is brought into contact with the protruding piece of the prism.

Next, the plurality of support beams are engaged with the beam brackets of each of the frame plates and the square columns, and if necessary, the support beams are bolted to the beam brackets of the square columns. Assembly is complete.

The outer frame is assembled by conventional means so as to maintain a predetermined spacing around the inner frame.

Concrete is poured between the inner and outer frames assembled in this manner, and once the concrete has hardened, the formwork can be disassembled as follows.

For the inner frame, first, when the beam brackets of the square columns and the support beams are bolted together, they are unfastened and the support beams are removed from the beam brackets of the square columns and the frame plate.

Next, when each square column is pulled inward, the square column is located inside the frame plate and is not in particular contact with the concrete, and the protruding pieces of the square column can easily be pulled out from between the ends of the frame plate. can be removed.

In this way, when each prism is removed, each frame plate is released from its inner support, and each frame plate is pulled inward without interfering with each other at its ends. By applying an external force such as tilting it inward, each frame plate can be easily removed, and the inner frame can be disassembled and removed.

On the other hand, the outer frame can be disassembled by known means.

<<Examples>> The present invention will be described below with reference to embodiments of the drawings.

As shown in Figures 1 to 4, the inner frame A consists of four frame plates 1, 1', 1'', 1, and four square pillars 2,
2', 2'', 2, and one support frame 7 as main members.

As shown in Figures 1 to 4, the four frame plates 1, 1', 1'', 1 are made of, for example, metal plates, wood, plastic plates, etc., and have predetermined dimensions such as the same length and width. Japanese middle crosspieces 1b, 1b made of square timbers made of metal, wood, plastic, etc. are erected with nails, screws, etc. at predetermined intervals in the width direction of the board 1a, approximately in the center of the inner surface of the board 1a, which has been formed. It is formed by a mounting plate.

Moreover, each of the frame plates 1 to 1 has its respective inner crosspiece 1b,
At the top and bottom of 1b, beam brackets 1c, 1c each having a substantially L-shaped side surface are fixed with nails, screws, etc. at one side bent upward or downward from the base as shown in the example. has been done.

On both left and right end surfaces of each plate material 1a in each of the frame plates 1 to 1, there are inclined surfaces 1 that are inclined from the inner surface to the outer surface.
d and 1d are formed.

The four square pillars 2, 2', 2'', 2 are made of solid material such as metal, wood, and plastic, or hollow material, and have a square cross section, and have a length of
It is formed substantially the same as that of each of the frame plates 1 to 1 described above.

Each of the square columns 2 to 2 is connected to the frame plate 1 from the protruding corner where the two adjacent outer surfaces 2a and 2b intersect.
A protruding piece 2c for forming an inside corner of a box (not shown) by which the inclined surfaces 1b of 1 to 1 are abutted against each other,
It is installed vertically so as to protrude on the extension of the diagonal line of the square.

The tip of this protruding piece 2c is formed at a right angle in the illustrated example, but if the inside corner of the box is to be formed into a curved surface, the tip may be formed into an arbitrary curved surface.

Moreover, each of the above-mentioned square columns 2 to 2 has beam holder fittings 3, 3 provided at the upper and lower portions of the two adjacent inner surfaces 2d, 2e, respectively.

Each of the beam brackets 3, 3 has two mounting portions 3a, 3a which are curved upward or downward as shown in the figure and arranged perpendicular to the plane, and two fitting parts 3a, which are also arranged perpendicular to the plane. The mounting portions 3b, 3b are formed into a substantially cross shape in plan view, and the mounting portions 3a,
The side plates 3c, 3c of 3a are fixed to the inner surfaces 2d, 2e of the prisms 2-2 by screws 4...or welding, etc., and attached to each prism 2-2.

Both the engaging portions 3b, 3b are connected to a support beam 7, which will be described later.
The bottom plate 3d and the left and right side plates 3e, 3e are formed into a substantially U-shaped cross section so that the respective corners of the bottom plate 3d and the left and right side plates 3e, 3e can be engaged with each other.
A bolt 6 for tightening, into which a wing screw 5 or the like is screwed, is erected at the portion where d and 3d are connected.

The support beam 7 is formed into a frame shape such as a rectangular plane made of metal, wood, plastic, etc., for example.

This support beam 7 has a width that allows it to be releasably engaged with each of the beam holder fittings 1c... and the beam holder 3, and each of the frame plates 1-1 and each of the square columns 2-
It is formed to a desired thickness so as to have sufficient strength to support the bolt 6 from the inside, and each corner 7a has a bolt hole 7b through which the bolt 6 is inserted. It passes through in the vertical direction.

Further, each of the prisms 2 to 2 has a locking piece 2f, as shown in FIG.
It is also possible to project horizontally with 2f facing outward.

These locking pieces 2f, 2f are arranged so that when the inner frame A is assembled, the lower ends of each frame plate 1-1 are placed on the locking pieces 2f, 2f, so that each frame plate 1-1 is This is useful for vertical positioning with respect to the prisms 2 to 2, and the inner frame A can be framed with high accuracy.

In FIG. 3, B indicates a known outer frame, which is formed by frame plates, vertical bars, horizontal beams, and the like.

≪Effects of the invention≫ Since the present invention is constructed as explained above, each corner pillar is built up at the required intervals, each frame board is superimposed on the outer surface of each corner pillar, and each beam is The simple operation of dropping the support beam into the bracket and tightening the bolts between the square column beam bracket and the support beam as necessary makes it possible to assemble the inner frame easily and efficiently. The frame plate and each corner column have a rigid structure that is integrally supported from the inside by support beams, so the frame plate will not bend inward due to concrete pouring pressure or the entire frame may be twisted. A highly accurate assembled state can be maintained vertically without deformation.

In addition, since the tips of the protruding pieces of each square column only make slight contact with the poured concrete, they can be easily removed by simply pulling each square column inward after disassembling and removing the support beam. After the prism is removed, a gap is formed between the ends of the frame plates by the protruding pieces, so the frame plates do not interfere with each other, and therefore the frame plates can be easily removed, making it easy to disassemble the inner frame. This can be done easily and quickly, and since each prism can be used for circular frames of various required sizes, overall costs can be reduced.

[Brief explanation of the drawing]

Figures 1a, b, and c are perspective views of a frame board, a square column, and a support beam, respectively, according to an embodiment of the formwork for a box according to the present invention;
Figure 2 is an enlarged plan view of the corner showing the assembled state of the frame plate, square pillars, and support beams; Figure 3 is an explanatory plan view of the entire assembly showing the assembled state; and Figure 4 is the support beam and one support beam. Top view of the same as above showing the state with the prism removed, No. 5
The figures are a plan view showing the formwork of a conventional box, Figures 6 and 7.
The figure is a corner plan view of a different example showing only the inner frame of a conventional box form. A...Inner frame, B...Outer frame, 1-1...Frame board,
1b...Middle beam, 1c, 3...Beam bracket, 2-2
...Prismatic column, 2c...Protruding piece, 7...Support beam.

Claims (1)

[Scope of utility model registration request] In the formwork of a box consisting of an inner frame and an outer frame arranged at a required spacing, the inner frame is provided with a plurality of vertically arranged inner frames, and the inner frame is placed inside the inner frame. a plurality of frame plates each having a beam holder on at least the upper and lower parts thereof, and a piece protruding from an outer corner so as to be sandwiched between the ends of each of the frame plates and to be able to be pulled out inwardly. The required plurality of square columns are installed vertically, and the frame plates are assembled at an angle to each other, and beam holders are provided on at least the upper and lower parts of the inside. A formwork for a box consisting of support beams that are formed so that they can be freely connected to and detached from respective beam holders and installed on each corner column.