JPH06306933A - Burying form - Google Patents

Abstract

PURPOSE:To increase workability, by dividing a burying form into corner forms and flat forms and making it possible to assemble them by providing mutually engaging means which can fit the above forms. CONSTITUTION:A burying for 2 for a column is shaped to form a square- cylinder composed of four L-shaped corner forms 3 and four flat forms 4 connected to both corner forms 3, 3. A burying form 1 for a beam is divided to L-shaped corner forms 5, forms 6, 7 for the beam bottom and beam sides. These are assembled to form a deep U-shaped ditch. And a pair of column forms 2 are erected at every specified interval and the beam form 1 is longitudinally divided to three constituents 1A thereof. The divided points are chosen to nearly correspond to the turning points of the bending load and the tensile stress. And the longest middle part is set in length so as to be optimum for haulage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precast buried formwork for constructing columns, beams and the like.

[0002]

2. Description of the Related Art According to the construction means using the above-mentioned buried formwork, there is no waste of resources as compared with the construction using a wooden concrete panel which is thrown away once or several times, and a precast formwork is used. Since the construction period can be shortened by leaving it exposed, embedded formwork tends to be widely used in the construction of columns and beam walls.

By the way, as shown in FIG. 8, a conventional buried formwork used for constructing a beam, for example, has a shallow U-shaped groove shape for a beam bottom in which formwork parts 11 for corners are continuously provided on both sides in the width direction. 9 and the two form members 13 in the form of flat plates that are butted and joined to the corner form parts 11 thereof. As shown in FIG. 5, a pair of shallow U-shaped groove-shaped frame members 15 in which corner frame portions 14 are similarly provided on both sides in the width direction,
It is composed of two flat plate-shaped frame members 16 that are butted and joined to the corner frame portion 14.

By taking the division structure in this way,
As shown in FIG. 10 for an embedded formwork for a pillar, these formwork materials 15 and 16 are not bulky by stacking them, so that the storage space is small and it is also suitable in terms of transportation. In addition, the light weight of the single item makes it excellent in terms of handling.

[0005]

However, in the above-mentioned structure, the U-shaped groove-shaped mold members 12 and 15 integrally connect the corner mold parts 11 and 14 on both sides in the width direction. Therefore, it cannot be diverted to beams and columns with different width dimensions, and it is only for columns and beams of a certain size, and it has poor versatility, and it can support columns and beams of various sizes. In order to achieve, the U-shaped groove form material 1 having different width dimensions
It was necessary to prepare a large number of 2, 15 and there was a problem that led to cost increase.

Further, when storing and transporting, as shown in FIG. 10, even if the mold frame members 15 are overlapped with each other so that the corner mold parts 14 are engaged with each other, depending on the height of the corner mold parts 14, The whole is bulky, and the mold members 15 are easily displaced from each other at the meshing surface portion of the corner mold portion 14 and the back mating surface of the flat plate surface portion.
There were some difficulties in terms of packing work and handling when storing and transporting.

It is an object of the present invention to provide a buried formwork for construction, which is capable of eliminating the above-mentioned disadvantages by a very simple and rational improvement.

[0008]

In order to achieve the above-mentioned object, in the present invention, a precast embedded formwork for constructing columns, beams, etc. is provided with an L-shaped formwork for corners. It is composed of a flat plate-shaped frame member that is butt-joined to a corner frame member. In addition, it is preferable to provide a concavo-convex portion that meshes with each other at the joint portion of both mold materials for the reason described later.

[0009]

According to the above characteristic structure, for example, one side of the corner form material is butt-joined to both sides of the flat form material, and the other side of the corner form material is flat. By embedding and joining a rectangular mold material, an embedded mold for a beam having a U shape as a whole is formed. Alternatively, an embedded formwork for a pillar is formed by abutting and joining flat plate-like formwork materials over four corner formwork materials so as to have a rectangular tube shape.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embedded formwork 1 for precast beams,
The embedded formwork 1 for beams is installed across a pair of precast column-made embedded formworks 2 and 2 which are vertically arranged at a predetermined interval.

The embedded formwork 2 for pillars is in the shape of a rectangular tube as shown in FIGS. 2 and 3, and has eight formwork members 3 in the circumferential direction with the division line near the corner. Divided into 4 parts, more specifically, 4 L-shaped corner mold members 3
, And four flat plate-shaped frame members 4 located between these frame members 3 and 3 to be butt-joined to each other. b is formed, and a reinforcing rib rib c is formed on the inner surface of the flat plate-shaped frame member 4 over the entire length in the longitudinal direction. , B are butted and meshed to be integrated. The rib c has a substantially inverted trapezoidal cross section as shown in an enlarged view of a part of FIG. 3 in order to enhance the adhesive force with the cast-in-place concrete.

An embedded formwork 1 for a beam is, as shown in FIG.
It is divided into three formwork structures 1A in the longitudinal direction of the beam, and the dividing point is in the vicinity of the switching point between bending stress and tensile stress when a bending load is applied to the beam, and at the most The length of the formwork structure 1A in the long middle portion is set to be a length suitable for transportation.

Each of the formwork components 1A has the shape of a deep U-shaped groove as shown in FIGS. 2 and 4, and is divided into five parts in the circumferential direction with the parting line near the corners. Formed by dividing into form materials 5 to 7, more specifically, two L-shaped corner form materials 5 and 5 and abutting on one side between the form materials 5 and 5. A plate-shaped beam bottom mold member 6 to be joined, and two flat plate-shaped beam side mold members 7 that are raised and joined to the other side of the corner mold member 5;
7 to form concavo-convex portions d and e that mesh with each other on the joint surfaces of the abutting joints, and on the inner surface side of the beam bottom frame member 6 and the beam side frame member 7, reinforcing protrusions are formed. The ribs f are formed over the entire length in the longitudinal direction, and the concave and convex portions d and e at the ends are abutted and meshed with each other via an adhesive to be integrated.

As for the formwork constructs 1A on both sides in the longitudinal direction, one end side thereof is, as shown in FIG. 2, at the end of the beam side formwork member 7, the corner formwork member of the pillar embedded formwork 2. The concave and convex portions 7a and 7b which mesh with the concave and convex portions a and b of 3 are formed (similar concave and convex portions are formed at the end portions of the corner mold material 5 as well,
Not explicitly shown in the drawing. )is doing. The rib f also has a substantially inverted trapezoidal cross section as shown in a partially enlarged view of FIG. 4 in order to enhance the adhesive force with the cast-in-place concrete.

According to the above construction, in the embedded formwork 1 for a beam, the corner formwork material 5 thereof is used as it is,
Formwork materials 6 and 7 with different width dimensions for beam bottom and beam side
By preparing the above, the embedded formwork 1 for beams having different width dimensions or height dimensions can be configured, and similarly in the embedded formwork 2 for pillars, the formwork material 3 for the corners of the embedded formwork 3 is directly used. By using the mold materials 4 having different width dimensions, the embedded mold 2 for columns having different width dimensions can be configured. That is, by making the corner mold members 3 and 5 versatile, the embedded molds 1 and 2 corresponding to columns and beams of various sizes can be constructed at low cost.

In addition, a component corresponding to a conventional U-shaped groove-shaped frame member in which corner frame parts are continuously provided on both sides in the width direction is used as L-shaped corner frame members 3 and 5. Since it is divided into the flat plate-shaped frame members 4 and 6, as shown in FIGS. 5 and 6, by superposing these individually, the storage space of these frame members 3 to 6 is significantly narrowed. Moreover, since the corner mold members 3 and 5 mesh with each other, no positional deviation occurs, which facilitates packing work and handling during storage and transportation.

The embedded formwork 2 for pillars constructed in this manner is erected at a predetermined position, the embedded formwork 1 for beams is erected on this, and the beam rebar is placed in the embedded formwork 1 for beams. Also, by arranging the column rebars in the buried formwork 2 for columns, and by placing concrete in each formwork 1, 2,
Beams and columns that are integrated with each other are constructed.

Incidentally, in the present invention, the concavo-convex portion of the joint portion of the two mold members that engages with each other is not only the concave-convex shape shown in FIGS. 3 and 4 but also the convex-concave shape shown in FIG. As shown in FIG. 7, it is also meant to include a form of phase cutout and a form in which a gasket G is fitted between the recesses facing each other as shown in FIG. is there.

[0019]

As described above, according to the present invention, a precast embedded formwork for constructing columns, beams, etc. is butted against an L-shaped corner formwork material and this corner formwork material. Divided into a flat plate form material to be joined, and the corner form material in this has versatility so that it can be used for construction of beams and columns with different width dimensions It is possible to provide an embedded formwork corresponding to the pillars and beams of the above at low cost.

Moreover, by stacking these form members individually, the storage space can be made much narrower than in the conventional case. Especially, the form members for corners are kept in a stacked state. Since they mesh with each other, there is no positional deviation, and packaging and handling during storage and transportation are extremely easy.

According to the second aspect, at the joint portion of each form material,
Since the concavo-convex portions that mesh with each other are provided, it is possible to surely prevent the positional deviation between the formwork materials and the leakage of concrete from the joint portion, and to firmly integrate the embedded formwork.

[Brief description of drawings]

FIG. 1 is a side view in which an embedded formwork for a beam is installed on an embedded formwork for a pillar.

FIG. 2 is a perspective view showing an erected portion of a beam embedded mold with respect to a column embedded mold.

FIG. 3 is an exploded end view of an embedded formwork for a pillar.

FIG. 4 is an exploded end view of an embedded formwork for a beam.

FIG. 5 is a schematic view showing a superposed state of pillar form materials.

FIG. 6 is a schematic diagram showing a superposed state of beam form members.

FIG. 7 is a cross-sectional view of a main part showing another example of the concavo-convex portions provided at the joints of the column frame member and the beam frame member that mesh with each other.

FIG. 8 is an exploded end view of a conventional buried mold for a beam.

FIG. 9 is an exploded end view of a conventional buried mold for a pillar.

FIG. 10 is a schematic view showing a state where the pillar frame members of the conventional example are superposed.

[Explanation of symbols]

3, 5 ... Corner form material, 4, 6, 7 ... Flat form material, a, d ... Recessed portion, b, e ... Convex portion.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Masashi Uozumi 32-32-1, Shiba, Minato-ku, Tokyo Haseko Corporation

Claims (2)

[Claims] 1. An embedded formwork made of precast for constructing a pillar, a beam, etc., which is an L-shaped corner formwork material and a flat plate-shaped mold butted and joined to the corner formwork material. An embedded formwork comprising a frame material. 2. A precast buried formwork for constructing pillars, beams, etc., which is an L-shaped corner formwork member and a flat plate-type mold that is butt-joined to the corner formwork member. An embedded formwork, which comprises a frame material, and is provided with a concavo-convex portion that meshes with each other at a joint portion of both formwork materials.