JP2001115644A - Connection device for foam body formwork - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a member for tightening, together with a bar with screw, a formwork made of a synthetic resin foam body from both ends so as to fix the synthetic resin foam body. SOLUTION: Plastic parts coming in contact with the surface of the opposed walls of a formwork formed of synthetic resin foam body and having a metallic female screw part at the center thereof in order to hold the shape of the formwork are connected and tightened to each other with a bar-shaped body passing through the female screw parts thereof. The size and shape of at least a part of the plastic parts are 20 cm or more in diameter and vertical and lateral widths. Each of the part of the plastic part items comprises a plurality of radially extending ribs having one side edge always brought into contact with the outside surface of the wall and the other side edge connected integrally with the inside surface of a dome-like or bevel-like portion, a flat part around the plurality of ribs formed by connecting the radial tip ends of the ribs, and a plurality of radially extending ribs connected integrally with the outside of the flat surface and the outside surface of a dome-like or a bevel-like portion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic part having a female female screw portion at the center in contact with the outer surface of an opposite wall of a mold made of synthetic resin foam in order to maintain the shape of the mold. The present invention relates to a device for connecting and tightening together with a rod-shaped body penetrating the female screw portion.

[0002]

2. Description of the Related Art In order to maintain the shape of a formwork, a female screw part made of metal is formed in contact with the outer surface of an opposing wall of a form made of synthetic resin foam or the surface of a board on the outer surface. There is known a form member for connecting and tightening plastic parts having a diameter of about 8 cm with a rod-shaped body penetrating the female screw portion thereof, and a part which is not fixed by concrete can be removed. (See FIG. 9).

[0003]

A plastic part having a diameter of about 8 cm and having a female female screw thread at the center thereof is provided on both the outer form wall and the inner form wall. It is intended to fix the formwork by both parts or to fix the board by placing it on the outside of the formwork.Therefore, it is necessary to set many members to fix the formwork, Because of the small size and the lack of clues due to the small size, it is difficult to construct the top of the construction.On the other hand, when the number is reduced, the space between the unsupported parts increases, and as shown by the dotted line in FIG. The part bulges, and the part becomes buried in the foam due to strong swelling and it becomes difficult to remove it, or the outer peripheral part of the circular plastic part curves and deforms the formwork to finish the concrete. Ri, but there is a problem that becomes worse.

[0004]

Means for Solving the Problems The present inventor has found that the above problems can be solved by the invention having the following structure. 1) In order to maintain the shape of the mold, at least one side is directly or indirectly in contact with the inner and outer surfaces of each of the opposing walls of the mold in which the mold is made of synthetic resin foam. In each of the formwork members that connect and tighten the plastic parts with threaded rods that penetrate at least some of the holes drilled in them, the plastic parts are joined to the threaded rods A metal part having at its center a female thread to be screwed, fixed to the plastic part or rotatable in the plastic part, the part being in contact with the inner and outer surfaces of the wall; The size and shape of at least one of the parts is at least 20 cm in diameter or width, and one edge is always in contact with the outer surface of the wall, and the other edge is a dome or A plurality of radially extending ribs integrally connected to the inner surface of the cap portion; a flat portion surrounding the plurality of rib radial ends; an outer surface of the flat surface and an outer surface of the dome or cap portion; And a plurality of ribs extending in a radial direction that are integrally connected to the mold. 2) In order to maintain the shape of the mold, at least one side of the mold is made of synthetic resin foam. Plastic parts directly or indirectly indirectly through plates or sheets with the respective inner and outer surfaces of the respective opposing walls are connected by threaded rods which penetrate at least some of the holes drilled in them. In each of the formwork members to be tightened, the plastic part is positioned against the outer surface of the wall.
The plastic part in contact with the outer surface of the wall has a diameter or a width of 20 cm or more, which is fastened by the rod-shaped body with a nut provided through a perforated flat plate further outside the plastic part. A plurality of radially extending ribs, one edge of which is always in contact with the outer surface of the wall and the opposite edge is integrally connected to the inner surface of the dome-shaped or shade-shaped portion; A member for a formwork, comprising: a flat portion around the periphery of the body; and a plurality of radially extending ribs integrally connected to the outside of the flat surface and the outside surface of the dome-shaped or shade-shaped portion.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. Drawing 1 shows the front view of one example of component 1 used for the member of the present invention. The part 1 has a cap-shaped portion 2 and a cap-shaped portion 2
Has a plurality of radially extending ribs 3 inside. Rib 3
Has a straight line for contacting the outer surface of the foam wall of the formwork, and the other edge is integrally connected to the hat-shaped portion 2. The edge on the center side of the rib 3 is integrally connected to a wall portion forming the center hole 6. An integrated flat portion 4 is provided around the cap-shaped portion 2. A plurality of ribs 5 connecting the outer surface of the flat portion 4 and the outer surface of the cap-shaped portion 2
Is also provided to prevent the flat portion 4 from warping.

FIG. 2 is a sectional view of FIG. 1 (AA ′ of FIG. 3),
FIG. 3 is a plan view of FIG.

In the embodiment of FIG. 4, the component 1 has a female threaded portion 8 embedded and fixed at the outer end of the center hole 6, whereby the component 1 'is screwed onto the male threaded connecting rod 10. The outer surface of the formwork wall can be clamped and clamped. As shown in this embodiment, the plastic part 1 can be contacted via the plate 7 without directly contacting the foam wall. A sheet of another material can be used instead of the plate 7. In the specific example of FIG. 5, an elongated nut 1 with a head in the center hole is used instead of the female screw portion being fixed at the center of the component 1 ″.
One has been dropped. On the other hand, in the embodiment of FIG. 6, the plastic part 1 ″ ′ is pressed against the outer surface of the wall by tightening the nut 13 on the threaded rod through the perforated plate 12. In this case plastic part 1 '''
Since they do not need to be rotated, they are easy to tighten and remove. The shape of the flat plate may be a square, a clover shape, or the like, but is preferably a shape giving any sufficient pressing area.

FIG. 5 illustrates a case where the shape of the plastic part is a dome shape. If the plastic component does not have sufficient rigidity, it may be better to have a dome shape (partially circular) than a trapezoidal shape when viewed from the side.

The embodiment shown in FIGS. 1 and 6 digs into the foam because the plastic part and the foam do not need to slide because they can slide between the plastic part and the outer flat plate. Make it easier to remove plastic parts. On the other hand, in a mode in which the flat plate is fixed to the plastic component, there is no need to combine the two components, the plastic component and the flat plate, so that the handling of the component is easy. Furthermore, if the flat plate is rotatably mounted on a plastic part (the mechanism of which may be obvious to one skilled in the art), both of the above two advantages can be obtained even if the shape becomes less simple. .

Generally, a round plastic part is preferable in terms of strength, but it is hardly obstructive when the form is fixed by a bolt-shaped iron pipe, and the length and width of the area covered by the plastic part can be easily understood. From a practical point of view, it may be preferable to use a square plastic part instead of a round shape, but FIG. 7 shows such a square plastic part.

Example of Assembly Procedure The foam form material is placed on opposing walls and a threaded rod with a small deformable plastic similar to FIG. 9 is passed through the hole in the foam inside each wall. The plastic part of FIG. 1 is screwed on the outside of each wall to fix the position of the foam.

[0012]

The member of the present invention can maintain the shape of the mold with a small number of uses for the mold, greatly reducing the trouble in construction.

By providing the ribs extending radially integrally with the inside of the cap-shaped portion, the structural strength of the ribs is increased, the distortion of the parts is prevented, and the finish of the concrete is improved. That is, since the structure has a rational structure in terms of strength, distortion due to concrete pressure can be prevented, and the finish of the concrete formed in the formwork becomes beautiful.

The peripheral part has a flat part 4, in the inner part of which one edge of the rib is always in contact with the foam wall or the surface of the plate or sheet thereon, so that it is supported over the whole part. Points can be secured, and the outer rib prevents the flat portion 4 from bending.

[0015] Such outer ribs and holes formed in the dome-shaped or shade-shaped portion of the plastic part serve as clues for turning and tightening the plastic part. Improve.

In the embodiment shown in FIG. 6, since the plastic part and the foam can be slid between the plastic part and the outer flat plate, the plastic part and the foam need not slide. To make it easier to remove.

[Brief description of the drawings]

FIG. 1 is a front view of a specific example of a plastic part used in a member of the present invention.

FIG. 2 is a sectional view of one specific example of FIG. 1;

FIG. 3 is a plan view of one specific example of FIG. 1 as viewed from the inside;

FIG. 4 is a cross-sectional view of an example of a plastic component having a metal female screw portion fixed to the center in a state of being attached to a mold.

FIG. 5 has a hole in the center, attached to the formwork;
FIG. 4 is a cross-sectional view showing a dome-shaped plastic part in which a metal female screw portion is non-rotatably inserted into the hole.

FIG. 6 is a cross-sectional view of a specific example of a plastic component which has no metal female screw portion at the center and is fastened with a nut via a flat plate in a state of being attached to a mold.

FIG. 7 is a plan view of a plastic part having a square plan view as viewed from the outside.

FIG. 8 is an explanatory view showing a state in which a synthetic resin foam mold held by a mold fixing member expands outward, and the mold fixing member bites into the foam.

FIG. 9 is an explanatory view showing fixing of a mold by a conventional plastic part having a small diameter.

Claims (2)

[Claims] 1. In order to maintain the shape of the form, at least one side of the form is made of synthetic resin foam, and directly or indirectly through a plate or sheet with each of the inner and outer surfaces of the opposing walls of the form. Using plastic parts that contact
By connecting and tightening at least one partly threaded rod at least one part permeating into at least one part of the hole drilled in the part, each foam is formed at one point of the formwork. In a form-fixing member for a form including or fixed to a wall-shaped fixing means made of the plastic part, wherein the plastic part is screwed into a rod-shaped body on both sides of the body part, A metal part having a female thread fixed to the plastic part or rotatable in the plastic part for being screwed into the torsion bar, the metal part having a central part, and an inner surface of the wall And the size and shape of at least one of the parts that are in contact with the outer surface have a diameter or a vertical and horizontal width of 2
0 cm or more, a plurality of ribs extending in a radial direction, one edge of which is always in contact with the outer surface of the wall, and the other edge is integrally connected to the inner surface of the dome-shaped or shade-shaped portion; A member for a formwork, comprising: a flat portion surrounding a front end in a direction, and a plurality of radially extending ribs integrally connected to the outside of the flat surface and the outside surface of the dome-shaped or shade-shaped portion. 2. In order to maintain the shape of the form, at least one side of the form is made of synthetic resin foam, directly or indirectly through a plate or sheet with the respective inner and outer surfaces of the opposing walls of the form. In each of the formwork members, the plastic parts are connected and fastened by threaded rods which penetrate at least some of the holes drilled in them, the plastic parts being the outer surface of the wall On the other hand, the nut is provided on the outside of the plastic part through a perforated flat plate and is fastened by the rod-shaped body. The size and shape of the plastic part in contact with the outer surface of the wall have a diameter or a vertical and horizontal width. 20 cm or more, with one edge always in contact with the outer surface of the wall and the other edge extending in a radial direction that is integrally connected to the inner surface of the dome or shade A plurality of ribs, a flat portion surrounding the plurality of rib radial tips, and a plurality of radially extending ribs integrally connected to the outside of the flat surface and the outside surface of the dome-shaped or cap-shaped portion. And a member for a formwork.