JPH0222436Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to improvement of concrete formwork.

There are various types of formwork for concrete pouring, including wood and metal, but those made of wood are lightweight,
They have the advantage of being inexpensive and have good adaptability in construction, but they have problems with strength and durability.Furthermore, metal ones have excellent strength and durability, but are heavy and difficult to handle. Due to their high cost, formworks having a structure in which wooden panels such as plywood are bonded to a metal frame body have recently become popular. However, this composite formwork of metal and wood is generally made by attaching a durable metal frame to a wooden panel, so the periphery of the wooden panel gets damaged after being used several times, and the concrete There is a disadvantage that the finish of the pouring surface deteriorates. Therefore, the peripheral edge of the wooden panel is sometimes surrounded by an extending metal frame or other metal members, but even with such formwork, the surrounding metal part and the wooden panel are Gaps and steps are likely to occur between the concrete, and as the frequency of use increases, these gaps will become larger, resulting in the formation of steps, burrs, etc. on the concrete pouring surface.

The formwork of the present invention was developed in view of the above-mentioned drawbacks of the conventional method.The formwork of the present invention was created by forming a stepped part lower than the panel mounting surface on the outer part of the wooden panel receiving part, and standing on the outer end of the stepped part. A frame is formed by forming an upper part and covering the upper surface of the stepped part and the raised part with an elastic body, and a wooden panel is fixed to the frame by attaching its peripheral part to the elastic body. , to protect the periphery of the wooden panel, to tightly connect the frame body and the wooden panel and to formwork each other, to prevent damage to the formwork and to obtain a good concrete pouring surface; The object of the present invention is to provide a concrete formwork that can be firmly adhered to, has high durability and strength, is lightweight, and can be manufactured at low cost.

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, 1 is a metal frame formed in the shape of a rectangular frame in plan view, and the cross section consists of an upright part 2 and a panel receiving part 3 extending horizontally to a predetermined width from its upper end toward the inside of the frame. It is formed into an approximately L shape. The upper surface of the panel receiving part 3 is provided with a large number of unevenness 15, and a step part 4 which is notched low to a predetermined depth is formed in the outer part than the middle part, and the inner edge thereof is It is a sloped hook part 5 with a deep cut toward the side, and a panel receiving part 3.
A screw insertion hole 16 is provided in the. Further, a plate-shaped raised portion 6 extending upward is formed at the connection portion between the upright portion 2 and the panel receiving portion 3, and the lower end portion thereof forms an acute-angled edge 7 toward the inside. and is connected to the outer surface of the upright part 2.

Reference numeral 8 denotes an elastic body that covers the above-mentioned raised portion 6 and stepped portion 4, and is made of synthetic rubber or the like and has a substantially T-shaped cross section. It is provided with a horizontal part 10 which has a thickness corresponding to the notch depth of the part 4 and extends over the upper surface of the step part 4, and a lower end of the part attached to the outside of the vertical part 9 is provided with a part of the frame. A hook part 11 is provided to fit around the acute edge 7 of the upright part 6, and a vertical part 9
The outer surface of the sloping surface 1 tapers downward.
2 is formed, and the inner end edge of the horizontal portion 10 has an engaging protrusion 1 that fits into the inclined catch portion 5 of the stepped portion 4 of the frame body.
It is formed in 3. Furthermore, an air conditioner 14 is provided in the top of the elastic body 8 to further enhance the elasticity. This elastic body 8 is usually formed integrally by pultrusion molding or the like, and is placed over the upright part 6 so that the hooking part 11 is engaged with the acute edge 7 thereof, and the engaging protrusion 13 of the horizontal part 10 is It can be attached by fitting into the inclined locking part 5. At that time, a stronger bond can be achieved by using an adhesive.

In addition, 17 is a wooden panel such as veneer, the lower surface of its peripheral part is placed on the upper surface of the panel receiver 3 and the horizontal part 10 of the elastic body, and is fixed to the frame 1 with screws 18 passed through the screw holes 16. The outer circumferential surface thereof is brought into close contact with the inner surface of the elastic body 8. and,
The wooden panel 17 and the upper surface of the elastic body 8 are arranged to be substantially flush with each other.

In use, the formwork of the present invention constructed as described above is often assembled into a plurality of parts and connected to each other using connecting fittings. In this case, each formwork is shown in Fig. 3. As shown, they are joined via the elastic body 8, and the molds are tightly joined together.

As explained above, the formwork of the present invention forms a stepped portion lower than the panel mounting surface on the outer side of the receiving portion of the wooden panel, and forms an upright portion at the outer end of the stepped portion. The frame body is constructed by covering the upper surface and the upright part with an elastic body, and the wooden panel is fixed to the frame body by attaching its peripheral part to the elastic body, so that the peripheral part of the wooden panel is protected by contact with an elastic body and will not be damaged even during long-term use, significantly improving durability, preventing steps and gaps from forming at joints, and ensuring a smooth concrete pouring surface. Can be formed. In addition, since the covered elastic body has its horizontal part held between the stepped part of the frame and the wooden panel,
The adhesion is reliable and strong, and there is no risk of it falling off. The formwork as a whole has a simple structure, is lightweight, easy to handle, and can be manufactured at low cost. Furthermore, because the covered elastic material allows the formwork to be connected to each other through the elastic material, this connection can be made tightly, preventing concrete slag from flowing out or creating steps. In addition, even when using a so-called plate separator, even if the plate separator is inserted between formworks, the elastic material allows for good conformability, so there is a risk that the formwork may not be tightly bonded to each other and concrete may flow out. Therefore, it is not necessary to form a notch for inserting a plate separator in the mold as in the conventional method, and it has many excellent effects such as having wide adaptability as a mold.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the formwork of the present invention;
FIG. 2 is an enlarged side sectional view of the same, and FIG. 3 is an enlarged side sectional view showing the molds of the present invention joined together. DESCRIPTION OF SYMBOLS 1...Metal frame body, 2...Upright part, 3...Panel receiving part, 4...Notch step part, 6...Standing part, 8...
Elastic body, 9... Vertical part, 10... Horizontal part, 17...
...Wooden panel.

Claims (1)

[Scope of utility model registration request] A step portion is formed in the panel receiving portion of the frame, which is formed into a substantially L-shaped cross section by an upright portion and a horizontal panel receiving portion, at a predetermined depth at a portion outside the intermediate portion thereof. A plate-like raised part extending upward is formed at the outer end, the raised part and the stepped part are covered with an elastic body, and the peripheral part of the wooden panel is attached to the inside of the elastic body to form a panel receiver. Concrete formwork characterized by being fixed in place.