JPS602897Y2 - Inner formwork for forming a cavity in a long concrete body - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a forming frame for forming a cavity in a long concrete body mainly used for a pretension type single hollow plate bridge girder.

Traditionally, long concrete bodies for civil engineering and construction, such as bridge girder materials, floor materials, and column materials, were made by using bulky non-processable wooden planks such as veneer and forming internal formwork on-site to make them lightweight structures. This was fabricated and buried inside a long concrete body to form a cavity inside it.

Such a wooden inner form has drawbacks in terms of workability and mass production, as well as high manufacturing costs.

This invention is intended to solve the above-mentioned drawbacks, and its purpose is to create a corrugated acid core plate with a plurality of slots on the outer periphery, a corrugated acid core plate that can be wound around the outer periphery of the core plate, and It consists of an outer winding board made of corrugated cardboard with insertion slots arranged at regular intervals in the longitudinal direction of both ends, and includes the above-mentioned core board and an outer winding board, and each of the various insertion slots in the outer winding board has a core. The ends of the outer winding plate are fitted into the grooves of the core plate in a meshing manner with the grooves of the plate, and both ends of the structure are sealed with a lid plate. By covering the outer periphery with a corrugated cardboard acid coating plate that has been treated with anti-water treatment, it is lightweight and convenient to handle, and is also extremely suitable for mass production. To provide a paper box with a cavity formed in an inexpensive concrete elongated body in which the capacity of the cavity of the elongated body can be arbitrarily changed.

This invention will be explained below with reference to the accompanying drawings.

1 is a core board made of strong paper like cardboard, and this core board 1
The outer shape is similar to a home base used in baseball.

Horizontal slots 3, 3 are provided in the center of both sides 2°2 of the core plate 1.
, and a slot 3' extending straight upward is formed in the center of the lower side 4.

The elongated outer winding plate 5 wound outwardly along the outer periphery of the core plate 1 is composed of a pair of left and right lower winding plates 5a, 5a and an upper outer winding plate 5b.

Each of the lower outer winding plates 5a, 5 has insertion slots 6 arranged in rows at regular intervals along the longitudinal direction at both ends 14 thereof.

The slots 3, 3 of the core plate 1 are fitted into the insertion slots 6, 6 of the lower outer winding plate 5a, respectively, in a meshing manner, and the core is inserted into the pair of left and right lower outer winding plates 5a, 5a. The upper outer winding plate 5b has both ends 15 inserted into the horizontal slots 3, 3 provided in the core plate 1 to form a long outer winding plate 5 that integrates the core plate 1 and the long outer winding plate 5. It is a shaku structure.

As mentioned above, the horizontal slots 3, 3 and the straight slots 3' formed in the core plate 1 each have a groove width that allows the ends of two long outer winding plates 5 to be inserted therein.

The core plate 1 and the long outer winding plate 5 that constitute the long structure are water resistant
When using waterproof reinforced cardboard, core plate 1
is used so that the cardboard mediums 7 run in columns, and the long outer winding plate 5 is used so that the mediums 7 run in horizontal rows.

8 is a crease formed in the longitudinal direction so that the long outer winding plate 5 can be easily bent.

Further, both ends of the elongated structure A formed by wrapping the elongated outer winding plate 5 around the outer periphery of the core plate 1 are sealed with lids 13, 13, and reinforced cardboard impregnated with a proofing agent such as wax. By adhering and covering the outer periphery of the elongated structure A with a covering plate 9 made of strong paper such as ``Long Structure A'', the intervals between the filaments in the longitudinal direction of the elongated structure A are sealed, and This is to reinforce A.

In addition, 10 is used as an inner formwork for concrete by covering the cover plate and then pasting the ends with tape or the like.

When a plurality of elongated structures A are arranged without interruption in rows Ia and their outer peripheries are to be covered with a plurality of covering plates 9,
If the end of the covering plate 9 and the end of the elongated structure A do not coincide with each other, the strengths of the elongated structure A and the covering plate 9 will act complementary to each other.

When a cavity is to be formed in the elongated concrete body 11, the elongated structure A covered with the covering plate 9 is used as the outer formwork 12.
By supporting the elongated concrete body 11 in a hollow shape and filling its outer periphery with ready-mixed concrete, a desired cavity is formed inside the elongated concrete body 11.

In addition, although the shape of the core plate is similar to a home base in the above embodiment diagram, it is not limited to this.

As mentioned above, this idea consists of a core plate made of corrugated cardboard with a plurality of slots formed on its outer periphery, a core plate that can be wound outwardly along the outer periphery of the core plate, and slots inserted at regular intervals in the longitudinal direction of both ends. and an outer winding board made of corrugated cardboard, which includes the core board and the outer winding board, and each insertion slot of the outer winding board is fitted with a slot in the core board in a mating manner. A corrugated board made of a structure in which the ends of the outer winding plate are fitted into the grooves of the core plate, and both ends of the structure are sealed with lids, and the outer periphery of the structure is treated with a blank. Since the outer wrapping plate and the covering plate only need to be rectangular in shape, processing of strong paper such as cardboard is minimized, and there is very little loss of material, so it is less expensive. can be provided to

Moreover, the structure is held by the core plate and kept in a constant shape, and its strength is further strengthened by the cover plate, so that it can sufficiently withstand the pressure when it is filled with concrete.

Since the material is cardboard and most of the inside of the inner form is empty, it is lightweight and inexpensive.

Moreover, since it can be assembled freely, it does not take up much space during transportation or storage.

Furthermore, the paper pattern is suitable for mass production by die-cutting, and can be easily assembled in a short time.

[Brief explanation of drawings]

The drawings show an embodiment of this invention; Fig. 1 is a partially cutaway plan view of the core plate, Fig. 2 is a partially cutaway plan view of the lower outer winding plate, and Fig. 3 is a partially cutaway plan view of the core plate. The upper outer winding plate is shown with a part cut away, Figure 4 is a cover plate shown with a part cut away, Figure 5 is a sectional view showing the inner formwork assembled, and Figure 6 is the assembled state. FIG. 7 is a sectional view showing a state buried in concrete, and FIG. 8 is a partially enlarged sectional view showing a state in use. 1... Core plate, 3, 3... Slot, 5... Outer winding plate, 6
...Insertion slot, 8...Lid plate, 9...Covering plate.

Claims (3)

[Scope of utility model registration request] (1) A corrugated acid core plate 1 having a plurality of slots 3, 3' on its outer periphery, and insertion grooves that can be wound outwardly along the outer periphery of the core plate 1 and are provided at regular intervals in the longitudinal direction of both ends. An outer winding plate 5 of corrugated cardboard having holes 6 arranged in a row includes the core plate 1 and the outer winding plate 5, and each insertion slot 6 of the outer winding plate 5 has a groove in the core plate 1. Both ends of the structure A are formed by fitting the holes 3 and 3' in an interlocking manner and fitting the ends of the outer winding plate 5 into the slots 3°3' of the core plate 1. A cavity shape forming frame for a long concrete body, characterized in that it is sealed with a lid plate 13 and its outer periphery is covered with a corrugated acid covering plate 9 which is subjected to proofing treatment. (2) The core plate 1 and the outer winding plate 5 are made of corrugated cardboard that has been subjected to a proofing process, and the cavity shape of the elongated concrete body according to claim 1 of the above-mentioned utility model registration claim is characterized in that frame. (3) The outer winding plate 5 includes an upper outer winding plate 5b and a lower outer winding plate 5a.
A cavity shape forming frame for a long concrete body as set forth in claim 1 of the above-mentioned utility model registration claim, characterized in that the frame comprises: