JP2809591B2 - Form for forming cement product and method for forming cement product using the form - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold for molding a cement product and a method for molding a cement product using the mold. In the present specification, a cement product refers to a product made of mortar, concrete, artificial stone, or the like.

[0002]

2. Description of the Related Art Building materials such as columns, floors, beams, walls and the like used on the site after molding in conventional cement products, for example, factories, etc.
The building material such as a foundation which is directly formed on site or is formed by using a plurality of wooden, metal, or wooden long flat formwork.

[0003] That is, for example, columns, beams, and the like used in the PC method or the like are provided in a desired molding die in a factory by arranging a plurality of the wooden or metal molds in parallel. A molding space was formed, concrete or the like was poured into the space, the mold was removed after concrete hardening, and the molded product was released from the mold. Also, when forming a foundation at the site, formwork is juxtaposed at the construction position to form a gap between the formwork and the formwork for forming the desired size of the foundation, and concrete is poured into the gap. After curing, the mold was removed and molding was performed.

[0004]

However, the above-mentioned conventional formwork is heavy and requires labor in handling and transportation, and may be injured if dropped accidentally during handling. This required careful work, resulting in a reduction in work efficiency. In addition, it is bulky, which causes difficulties in storage and transportation.

[0005] The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object the purpose of obtaining the same effect as that of the conventional metal mold, while reducing the weight. An object of the present invention is to provide a mold for molding a cement product which is excellent in handleability and safety and is easy to transport, and to provide a method for molding a cement product using the mold.

[0006]

Means for Solving the Problems In order to achieve the above-mentioned object, a technical means of the present invention is to provide a mold formed of an airtight non-stretchable flexible sheet and provided with an air inlet / outlet. Urethane foam is provided inside the frame body, all the outer surfaces are formed of flat surfaces, and adjacent outer surfaces are in contact with each other at right angles.

Another object of the present invention is to form a non-stretchable flexible cover having the same shape as that of the mold body, and to integrally cover the outer periphery of the mold body with the cover.

In addition, urethane foam is provided in a mold body provided with an air-injecting / discharging portion and formed of an airtight non-stretchable flexible sheet, and all outer surfaces are constituted by flat surfaces. At the same time, the molds whose adjacent outer surfaces are in contact with each other at right angles are expanded via the air injection / discharge unit, and one or more molds are inserted side by side into the mold. The cement product is formed by forming a cavity for molding the cement product with the frame, and then pouring the cement into the cavity, and after hardening the cement, the mold is shrunk and removed via the air injection and discharge portion. Is done.

Also, urethane foam is provided inside a mold body provided with an air injecting / discharging portion and formed of a non-stretchable flexible sheet having airtightness, and all outer surfaces are constituted by flat surfaces. At the same time, the formwork whose adjacent outer surfaces are in contact with each other at right angles is inflated through the air injection / discharge unit, and a plurality of adjacently arranged side by side are formed on the construction surface to form a surrounding space. Cement is poured into the space or outside the space, and after the cement is hardened, the mold is shrunk and removed through an air injection / discharge unit to form a cement product.

[0010]

According to the above technical means, all the surfaces of the mold body are formed as flat surfaces, and the adjacent surfaces are in contact with each other at a right angle, so that the mold body has corners and flatness.
And since it is a formwork which consists of a flexible sheet and urethane foam, it is lightweight and a tactile feeling is soft.

In addition, by providing a non-stretchable flexible cover integrally on the outer periphery of the form body, the flatness is further improved and the strength is also improved.

[0012]

An embodiment of the present invention will be described below.

The form A is composed of a form body 1 and a urethane foam 7, and in this embodiment, the outer periphery of the form body 1 is covered with a cover 9. In this embodiment, the case where the cover 9 is provided will be described. However, the cover 9 may not be provided, and the cover 9 may be provided as needed.

The formwork body 1 is formed of an airtight non-stretchable flexible sheet, and the body is constituted by flat surfaces on all surfaces and adjacent surfaces contacting at right angles. For example, as an example, a cross section is formed by an airtight and non-stretchable flexible laminated sheet (urethane tarpaulin) 4 in which a woven fabric layer 2 made of a monofilament yarn is sandwiched between upper and lower urethane layers 3 and 3. It is formed in a rectangular rectangular bag, and is configured to be inflatable and contractible.

That is, according to the above specific configuration, the mold body 1 has all the surfaces 1a formed of flat surfaces.
.. Adjacent to each other at a right angle (indicated by x in the figure).

In the figure, reference numeral 5 denotes an air injecting / discharging portion, which is optional, such as an air valve having a normal structure, and is not limited at all. Further, the material of the form body 1 is only an example,
There is no particular limitation as long as the sheet is made of an airtight, non-stretchable, and flexible material, and is a known laminated sheet (tarpaulin) made of synthetic resin, rubber, or other components. May be changed as appropriate.

The size, thickness, and width of the mold body 1 are arbitrary, and can be formed from small to large ones according to the intended use, regardless of the size. The handleability is good because it can be contracted and folded. In addition, the shape is not limited to a rectangular cylindrical bag whose cross section is limited to a rectangular shape, as long as all surfaces are formed of flat surfaces and adjacent surfaces are in contact with corners. In addition, the cross-sectional shape such as a triangular cross-section, a square shape, and a U-shape is arbitrary irrespective of a simple shape, a complicated shape, and the like, and can be freely changed within the scope of the present invention.

The urethane foam 7 is housed in the interior space 1a of the mold body 1, has the same shape as the body 1, has a size to be in contact with the inner surface of the body 1, and its compressive stress and the like are arbitrary. For example, those having 30% compressive stress and 50 gf / cm ² are installed.

The urethane foam 7 is formed by injecting and foaming into the mold body 1 disposed in the mold, or the urethane foam 7 is formed in advance, and the mold body 1 is formed according to the foam 7. Any method may be adopted, and there is no particular limitation as long as all surfaces of the mold body 1 can be configured as flat surfaces and adjacent surfaces can be in contact with corners.

The cover 9 is intended to maintain the flatness of each surface 1a of the form body 1 and to improve the strength thereof, and to use a non-stretchable flexible sheet to expand the form body 1 when expanded. In the present embodiment, the fabric layer 10 is sandwiched between upper and lower vinyl chloride resin (PVC) layers 11 and 11 to form the same shape as that described above and integrally coat the outer periphery of the mold body 1. And an insertion / discharge opening at the same position as the injection / discharge unit 5 provided on the mold body 1, and the front and rear surfaces 9a and 9b thereof are respectively closed. Do it. Further, the material of the cover 9 may be any material as long as it is a non-stretchable flexible sheet, and unlike the mold body 1, airtightness is not required. In this embodiment, the case where the cover 9 is provided will be described, but the cover 9 may not be provided.

The method of closing is not particularly limited and is arbitrary. A well-known method such as a so-called tucker stop or a method of closing with a string can be applied.
A structure in which 9b can be closed in a flat shape is preferable.

In this embodiment, the front face 1 of the form body 1 is
c and rear surface 1d and front surface 9a and rear surface 9b of cover 9
Between the front and rear surfaces 9a and 9b, for example.
Plates 15, 15 made of hard resin such as P (polypropylene)
The flatness of the front and rear surfaces 9a and 9b is obtained by interposing (see FIG. 1). The flatness of the front and rear surfaces 9a and 9b is required to improve the close contact when the front and rear surfaces 9a and 9b are combined with the adjacent formwork A. Also,
The flat plate 15 is not limited to the hard plate made of PP, and may be made of a known hard resin material such as PVC.

Further, as shown in FIG. 6, the rigid resin flat plate 15 may be provided between the form body 1 and the urethane foam 7.

The means for fixing and integrating the cover 9 and the frame body 1 is not limited at all, and any well-known means can be applied as appropriate. In this embodiment, a nut is provided in a concave shape on the outer peripheral surface 1 'of the air body 1. Are provided (welder welding or the like), insertion holes 13 are provided at positions on the outer periphery 9 'of the cover 9 corresponding to the nuts 12, and set screws 14 are attached from above to make the two integral. Since the mold A of the present invention is a flat surface on all surfaces 1a, it is preferable to adopt a well-known device so that the welded portion of the nut 12 and the head 14a of the set screw 14 do not protrude.

Next, a method of molding a cement product using the above-described mold A will be described with reference to FIG.

First, FIGS. 3A and 3B show a case where beams, columns and the like used in the so-called PC method are formed in a factory or the like. Air is injected from the discharge part 5 to be expanded respectively.

Next, the expanded mold 1 is inserted into the mold B, and a gap C for molding a cement product is formed and adjusted between the mold B and the mold A. A desired amount of cement (mortar, concrete, artificial stone, etc.) is poured into the formed and adjusted space C. In addition, since the mold A is lightweight, the gap C can be adjusted even after the cement is poured.

When the cement has hardened after a predetermined time has elapsed, the injection / discharge unit 5 is opened to discharge the air in the mold A. By the discharging action, the urethane foam 7 and the cover 9 are attached to the mold A together with the cover 9. The contraction operation is started, and the operation releases the mold product from the surface d of the cement product D. Therefore, there is no need to break the product after molding (in the case of a wooden formwork) unlike the conventional mold.

Then, when the product is released from the mold B, a desired cement product (beam, column, etc.) D is formed.

Next, the embodiment shown in FIG. 4 will be described.

FIG. 4 shows a method of molding using a mold A instead of a conventional mold when forming a foundation formed at a construction site or the like, for example. A required number of front and rear surfaces 9a and 9b are brought into contact with each other and arranged in a predetermined position, and a desired surrounding space E is formed by each of the molds A, and cement (mortar, concrete, artificial stone, etc.) is formed in the space E. Pour the desired amount.

When the cement has hardened after a predetermined period of time, the injection / discharge section 5 is opened in the same manner as described above, and each mold A
When the air inside is discharged, the form A
When the urethane foam 7 starts a contraction operation together with the cover 9 and the mold is released from the surface d of the foundation D by the operation, the foundation D is completed. Therefore, it is not necessary to break the product after molding (in the case of a wooden form) as in the case of the conventional mold as in the above case. In the above example, an example in which the cement is poured into the surrounding space E to form the foundation D has been described. However, the same applies to the case where the cement is poured outside the surrounding space E to form a floor material having a pillar standing space. (Not shown).

FIG. 5 shows another embodiment in which cement is flown out of the surrounding space E to form a floor material having a pillar standing space. In this embodiment, a mold A is formed in a planar U-shape, and the molds A, A having the same shape are joined to each other by projecting pieces a, a and a, a into each other.
To form The structures of the mold body 1, the urethane foam 7 and the cover 9 have the same material and the same compressive stress as that of the urethane foam except for the shape of the U-shape, and thus need not be particularly described.

Although not particularly limited,
As shown in FIG. 7, the connection holding structure between the adjacent molds A may be connected to each other by providing hook-and-loop fasteners 17 on the peripheral edges of the respective contact surfaces 16. The fastener 17 may be provided on the entire surface of the contact surface 16 and is not limited to any particular mounting structure. Further, a snap having a well-known shape may be provided in place of the hook-and-loop fastener 17, and may be connected by a locking action of the snap. Structure,
It can be appropriately changed to a conventionally known connection structure.

[0035]

According to the present invention, urethane foam is formed in a mold body provided with an air injecting / discharging portion and formed of a non-stretchable flexible sheet having airtightness, and all outer surfaces are flat. And a new configuration in which the adjacent outer surfaces are in contact with each other at right angles, and the formwork body has corners and flatness to achieve the same use effect as conventional metal or wooden formwork. As a result, it is lightweight, has excellent handleability and safety, and can reduce work labor. In addition, it can be expanded only during use, and can be compactly folded and folded during storage and transportation, thereby improving storage and transportability. Therefore,
The efficiency of the entire cement product molding operation can be improved as compared with a conventional mold frame for cement product molding.

Further, by forming a non-stretchable flexible cover having the same shape as the form body when inflated and integrally covering the outer periphery of the form body with the cover, the flatness can be further improved. In addition, since the cover and the main body have a double structure, the strength is improved. In addition, when the bag body or the cover is damaged by replacing the bag body with the double structure, the cost can be reduced by replacing only the bag body or the cover.

Further, the mold is expanded and inserted one or more in parallel into the mold, and a gap for forming a cement product is formed between the mold and the mold. Injecting cement into the voids, and if the molding method is to shrink and remove the mold after cement hardening, compared to the case of using a conventional mold for cement product molding, the mold and the mold and It is easy to adjust the gap for molding the cement product formed between them.

Further, the above-mentioned molding method or a plurality of inflated molds are arranged side by side on the construction surface to form a surrounding space, and then cement is poured into or out of the space. If the molding method is to shrink and remove the above mold after curing, in the case of a conventional cement product molding mold (in the case of wood), the mold must be destroyed after cement hardening and the product removed. However, according to the molding method of the present invention, if the mold is shrunk after the cement is hardened, only the mold can be removed from the cement product surface by the shrinkage action. Is also effective.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing one embodiment of a mold of the present invention.

FIG. 2 is an overall perspective view.

FIG. 3 is a use state diagram.

FIG. 4 is another use state diagram.

FIG. 5 is another use state diagram.

FIG. 6 is a perspective view showing another embodiment.

FIG. 7 is a longitudinal sectional view showing a connected state of the molds.

[Explanation of symbols]

A: Formwork 1: Formwork body 1a: Surface 1b: Inner surface 4: Flexible sheet 7: Urethane foam 8: Through hole 9: Cover 9a: Front surface 9b: Rear surface 15: Flat plate x: Square B: Molding die C: Void D : Cement products

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04G 9/08

Claims (4)

(57) [Claims] An urethane foam is provided inside a mold body provided with an air injecting / discharging portion and formed of a non-stretchable flexible sheet having airtightness, and all outer surfaces are constituted by flat surfaces. A mold for molding a cement product, wherein adjacent outer surfaces are in contact with each other at right angles. 2. A urethane foam is provided in a mold body which is formed of an airtight non-stretchable flexible sheet and provided with an air injecting / discharging portion, and all outer surfaces are constituted by flat surfaces. At the same time, adjacent outer surfaces are in contact with each other at a right angle, and a non-stretchable flexible cover having the same shape as the form body when inflated is formed, and the cover integrally covers the outer periphery of the form body. A mold for molding a cement product, comprising: 3. A urethane foam is provided inside a mold body provided with an air injecting / discharging portion and formed of a non-stretchable flexible sheet having airtightness, and all outer surfaces are constituted by flat surfaces. At the same time, the molds whose adjacent outer surfaces are in contact with each other at right angles are expanded via the air injection / discharge unit, and one or more molds are inserted side by side into the mold. Forming a cavity for forming a cement product between the frame and the cement, and then pouring the cement into the cavity, and after hardening the cement, shrinking and removing the mold via an air injection / discharge unit. Product molding method. 4. A urethane foam is provided in a mold body provided with an air injecting / discharging portion and formed of a non-stretchable flexible sheet having airtightness, and all outer surfaces are constituted by flat surfaces. At the same time, the formwork in which the adjacent outer surfaces are in contact at right angles is inflated via the air injection and discharge portion, and a plurality of adjacently arranged side by side are formed on the construction surface to form a surrounding space. A method for molding a cement product, wherein cement is poured into or out of a space, and after the cement is hardened, the mold is shrunk and removed via an air injection / discharge unit.