JP2005280001A - Method for producing decorative plate pointing precast concrete plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the slag of poured concrete from seeping on the surface of a decorative plate when a decorative plate pointing precast concrete plate is produced. <P>SOLUTION: The decorative plates 5 made of rectangular plates are placed in a form while the end surfaces on the side of the long sides and the end surfaces on the side of the short sides are contacted with each other. The joining part H on the side of the long sides or the joining part V on the side of the short sides is sealed by a viscous liquid adhesive 8 from its back side, and the joining part on the side of the long sides or the other joining part on the side of the short sides is sealed by an adhesive tape 7. After the curing of the viscous liquid adhesive, concrete is poured to cover the decorative plate and cured to obtain the precast concrete plate with the decorative plate and the concrete integrated. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for manufacturing a precast concrete board in which a decorative board such as a tile is integrally attached to a surface, and in particular, a decorative board-advanced precast in which the decorative board is integrally attached when the precast concrete board is formed. The present invention relates to a method for producing a concrete board.

  In general, in precast concrete boards (hereinafter abbreviated as PC boards) such as precast concrete walls used for the outer walls of buildings, for example, on the surface for the purpose of enhancing design effects and waterproofing A decorative board is provided.

And as a manufacturing method of this PC board, after laying a large number of decorative boards in a mold used for molding a PC board, concrete is placed in the mold so as to cover these decorative boards and hardened. By doing so, a so-called decorative plate attaching method, in which the cast concrete and the decorative plate are integrated, has been implemented.
The decorative board is generally formed of a rectangular plate material, and is attached to the PC board in a state where a predetermined interval (that is, a joint) is provided between end faces of adjacent decorative boards. In such a PC board, the joints are provided in a grid pattern.

  By the way, according to such a method of manufacturing a PC board, the concrete paste placed in the mold oozes out from the joint portion to the surface side of the decorative board, and stains the surface of these decorative boards. Therefore, it is necessary to clean the surface of the PC board after demolding to remove the stick attached to the surface of the decorative board.

On the other hand, in order to eliminate such problems, the following techniques have been proposed.
That is, a belt-like sealing member is disposed on the back side of the joint formed between the decorative plates so as to cover the joint, and both side edges of the belt-like sealing member are joined to the back surface of the decorative plate. After being fixed by the above, concrete is placed in the mold to be hardened (see Patent Document 1).
By this technique, the concrete to be placed and the joint can be shielded by a belt-like sealing member, and bleeding of noro from the joint can be suppressed.

JP 2000-289011 A

  However, the above-described conventional technique still has the following problems to be improved.

That is, in the above-described conventional technology, the grid-like joints provided between the decorative plates are sealed with a belt-like sealing member, but are arranged so as to cover the joints at the intersections of the joints. The belt-like sealing members to be made are crossed so as to overlap each other.
Here, since the strip-shaped sealing member has a thickness, the strip-shaped sealing member disposed above the surface of the cross-section floats at both side edges of the strip-shaped sealing member below,
A gap is formed between the upper and lower belt-like sealing members or between the upper belt-like sealing member and the decorative plate.
Such a defect is easily promoted by variations in the pasting work of the belt-like sealing member.

  Such a phenomenon occurs in all of the intersections of the joints, causing noro to ooze out from the gaps to the surface of the decorative board and contaminate the decorative board surface. Further improvement is required from the viewpoint of preventing contamination.

The present invention has been made as a solution to the above-described problems remaining in the prior art, and the method for manufacturing a pre-cast concrete board with a decorative board according to claim 1 comprises a rectangular plate material in the formwork. The decorative board is spread by bringing the end faces on the long side and the end faces on the short side into contact with each other, and either the long side joint or the short side joint is mucous from the back side. And seal the other of the long side joint or the short side joint with an adhesive tape, and after curing the viscous adhesive, cover the decorative plate with concrete. By casting and curing, a precast concrete board in which the decorative board and concrete are integrated is obtained.
The manufacturing method of the decorative board pre-attached precast concrete board according to claim 2 is characterized in that the decorative board according to claim 1 has either one of a joint part on the long side or a joint part on the short side. It is characterized in that it is continuous in a straight line and is spread so that the other joint is located in the middle of the one joint.
According to a third aspect of the present invention, there is provided a method for producing a pre-cast concrete board with a decorative plate, wherein a short side joint portion of the decorative board according to any one of the first and second aspects is sealed with a viscous adhesive. The side joint is sealed with an adhesive tape.
According to a fourth aspect of the present invention, there is provided a method for producing a pre-cast concrete board with a decorative plate, wherein a long-side joint portion of the decorative board according to any one of the first and second aspects is sealed with a viscous adhesive. The side joint is sealed with an adhesive tape.

According to the first aspect of the present invention, a plurality of decorative plates are laid in the formwork in a state in which the end surfaces on the long side and the end surfaces on the short side are in contact with each other, and one of these joints Is sealed with a viscous adhesive, so that the gap between the joints is sealed as much as possible, so even when sealing with a viscous adhesive, the viscous adhesive is Since it does not sag into the joint part and a sufficient area of adhesion with the decorative plates on both sides can be secured, the joint part can be easily and reliably sealed to prevent generation of a gap as much as possible.
Further, even when the other joint is sealed with the adhesive tape, since both the decorative plates are in contact with each other, it is possible to suppress the occurrence of bending in the adhesive tape to be applied. It is possible to reliably adhere the adhesive tape to the decorative plate and prevent the occurrence of gaps at these joints as much as possible.
Furthermore, even if there is a gap between the pressure-sensitive adhesive tape and the decorative board at the portion where the seal portion with the adhesive tape and the seal portion with the viscous adhesive intersect, The viscous adhesive enters into the gap due to its viscosity, or the viscous adhesive is pushed in by the pressing force during the sealing operation, thereby closing the gap.
Therefore, due to these synergistic effects, the generation of gaps at the joints of multiple decorative plates can be reduced as much as possible. When concrete is placed on the back side of the decorative plate, Noro seeps out on the decorative plate surface. It can be greatly suppressed.
Along with this, it is possible to reduce the surface cleaning work after removing the PC plate.
Further, as in the invention described in claim 2, the decorative plate includes a long-side joint or a short-side joint that is joined in a straight line, and the other joint is Even when it is laid down so as to be located in the middle of the one joint (in other words, when the decorative board is laid in a staggered manner), the gap in these joints is efficiently blocked by the action of the first aspect. be able to.
Therefore, the freedom degree of the arrangement | sequence form of a decorative board can be raised, suppressing the bleeding of Noro.
And the use place of a viscous adhesive agent or an adhesive tape can be suitably selected as described in Claim 3 or Claim 4.
In particular, by using an adhesive tape at the joint part that is continuous in a straight line, it is possible to simplify the work by reducing the number of times this adhesive tape is cut, and it is less expensive than a viscous adhesive. It is possible to increase the usage ratio of the adhesive tape and suppress the material cost for the seal.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of a house H constructed using a part of the PC board 1 (1a, 1b, 1c) manufactured according to this embodiment.

The PC board 1a constitutes the wife side wall of the first floor part of the house H, the PC board 1b constitutes the wife side wall of the second floor part, and the PC board 1c is the wife of the veranda part. It constitutes a handrail on the side.
Other PC boards have the same configuration except for the shape.

As shown in FIG. 2 (b), the PC board 1a used for the first floor portion is formed with a window opening 2 and a discharge port 3, 3 so that the PC board used for the second floor portion. Two window openings 2 are formed in 1b.
Each of these PC plates 1a to 1b is constructed by integrating a large number of decorative plates 5 made of rectangular tiles on the surface of concrete C to be placed as described later.
The decorative board 5 is attached by stacking a plurality of tile groups in the height direction of the PC board 1 as a group of tile groups arranged linearly in the width direction of the PC board 1. The decorative board 5 of the group located in the lower group of the decorative boards 5 is installed by being shifted by a half pitch (half the length of the decorative board 5) in the width direction of the PC board 1 as a whole. Arranged in a shape.
In addition, each of the decorative plates 5 is in contact with the end surfaces of the adjacent decorative plates 5.

  Next, an embodiment of the method for manufacturing the PC board 1 according to the present invention will be described using the handrail PC board 1c.

  First, as shown in FIG. 3, a rectangular mold 6 for forming the PC plate 1 c is assembled on a base (not shown), and a large number of decorative boards 5 are staggered in the mold 6. Further, the two decorative plates 5 are laid closely so that the end surfaces of the adjacent decorative plates 5 come into contact with each other.

  In this state, the decorative board 5 arranged in the width direction of the PC board 1c is continuously arranged in a straight line. F) is a continuous straight line, and a joint V (referred to as a joint on the short side) V with another decorative board 5 disposed on the side is a joint F on the long side. Further, they are abutted at the intermediate position of the long side of the decorative board 5.

  And in this embodiment, as explained in full detail in FIG. 4, the adhesive tape 7 is affixed over the full length so as to cover the long side joint F, and the short side joint V is covered. The adhesive adhesive 8 is applied over the entire length so as to cover all the joints F and V, and the adjacent decorative plates 5 are joined to each other.

  When the viscous adhesive 8 is applied, the adjoining decorative plates 5 are brought into contact with each other, and the gap between the joints V on the short side is extremely narrow, whereby the viscous liquid to be applied is applied. The adhesive 8 does not sag into the short side joint V, and a sufficient bonding area with the decorative plate 5 on both sides is secured. Therefore, the gap between the short side joints V is ensured. Can be easily and reliably closed.

Moreover, when adhering the adhesive tape 7, as described above, the adjoining decorative plates 5 are brought into contact with each other, and the joining portion F on the long side is extremely narrow, so that the adhesive tape 7 is affixed. There is almost no bending of the adhesive tape 7, and it sticks uniformly on the back surface of the decorative board 5 on both sides of the joint F on the long side.
Therefore, it is possible to easily and reliably close the gap between the long side joints F.
On the other hand, in the present embodiment, the long-side joint portion F is formed as a continuous straight line over the entire length in the width direction of the PC plate 1c. Since the pasting operation to the joint F on the long side can be performed by one continuous operation, the operation is simple.

Further, the adhesive tape 7 and the viscous adhesive 8 overlap each other at the intersection of the short side joint V and the long side joint F.
Here, even if the adhesive tape 7 is lifted, the viscous adhesive 8 enters the gap formed by the lifting due to its own viscosity or due to the pressing force applied by the operator. Can close this gap.

  Next, as described above, all the joint portions F and V are sealed, and after the viscous adhesive 8 is cured, the mold 6 is assembled into a predetermined shape as shown in FIG. The reinforcing reinforcing bars 9 are inserted and installed at predetermined positions using spacers or the like as necessary.

  Thus, as shown in FIGS. 6 and 7, concrete C is placed in the mold 6 and curing is performed until a predetermined strength is developed in the concrete.

  Here, all of the joint portions F and V of the decorative board 5 spread on the lower surface of the placed concrete are almost completely blocked by the viscous adhesive 8 and the adhesive tape 7. For this reason, it is possible to prevent the stick in the concrete C from oozing out to the surface side of the decorative board 5.

After the concrete C exhibits a predetermined strength, the concrete C can be removed from the mold 6 to obtain the PC plate 1c. The surface state is shown in FIG.
Here, for comparison, a PC plate is formed without performing the sealing process according to the present embodiment, and the surface state thereof is shown in FIG.
As is clear from these figures, in the comparative example shown in FIG. 9, dirt M is generated on most of the surface of the PC board 20, but in the PC board 1 c according to the present embodiment, there are several places. Only a little dirt M is seen.

It is a side view of the house constructed using the precast concrete board manufactured by one embodiment of the present invention in part. It is a front view which shows the precast concrete board manufactured by one Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view illustrating a state in which a decorative board is laid in a mold, showing an embodiment of the present invention. 1 shows an embodiment of the present invention and is an enlarged view of a main part showing a sealing structure on the back surface of a decorative board. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view illustrating a state in which reinforcing bars are disposed in a mold according to an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a state in which concrete is placed in a mold, showing an embodiment of the present invention. FIG. 1, showing an embodiment of the present invention, is a longitudinal sectional view showing a state in which concrete is placed in a mold. It is a front view of the precast concrete board manufactured by one Embodiment of this invention. It is a front view of the precast concrete board manufactured by the conventional method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 PC board 1a PC board 1b PC board 1c PC board 2 Window opening 3 Sweep opening 5 Decorative board 6 Formwork 7 Adhesive tape 8 Viscous adhesive 9 Reinforcing bar C Concrete M Dirt F (long side) joining Part V (Short side) Junction H House

Claims (4)

In the formwork, a decorative plate made of a rectangular plate material is laid down by bringing the end surfaces on the long side and the end surfaces on the short side into contact with each other, and the long side joint or the short side joint Is sealed from the back side with a viscous adhesive, and the other of the long side joint or the short side joint is sealed with an adhesive tape to cure the viscous adhesive. A method for producing a precast concrete board with a decorative plate in advance, wherein a precast concrete board in which the decorative board and the concrete are integrated is obtained by placing and curing the concrete so as to cover the decorative board. The decorative plate is arranged such that either one of the long side joint or the short side joint is continuous in a straight line, and the other joint is located in the middle of the one joint. The method for producing a pre-cast concrete board with a decorative board according to claim 1, characterized in that it is spread. The short side joint portion of the decorative board is sealed with a viscous adhesive, and the long side joint portion is sealed with an adhesive tape. A method for producing a precast concrete board with a decorative panel. The long-side joining portion of the decorative board is sealed with a viscous adhesive, and the short-side joining portion is sealed with an adhesive tape. A method for producing a precast concrete board with a decorative panel.

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