JP3623865B2 - Method for producing precast concrete board driven by stone board - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for producing a pre-cast concrete board that is suitable for use when, for example, a surface such as a retaining wall is formed of natural stone.
[0002]
[Prior art]
Conventionally, a precast concrete plate (hereinafter abbreviated as “PC”) with a plate-like stone plate only on the surface is used to industrialize the retaining wall that has been constructed by stacking massive natural stones. In recent years, construction methods have been developed and put into practical use.
[0003]
In order to manufacture such a stone board driving PC board, as shown in FIG. 5, first, a stone board 2 is set in the mold 1, and this stone board 2 is a front surface (lower side in the figure). Since there are irregularities like natural stone, the fixing material 3 made of sand, paraffin or the like is arranged on the bottom surface of the mold 1. And after fixing the stone plate 2 substantially horizontally with this fixing material 3, the concrete 4 was placed in the mold 1. Thereafter, after the concrete 4 is hardened, the mold 1 is disassembled and demolded to form a stone plate driving PC plate 5 in which the stone plate 2 is driven on the surface.
[0004]
[Problems to be solved by the invention]
However, in the manufacturing method of the conventional stone plate driving PC plate as described above, the fixing material 3 such as sand or paraffin is used to fix the uneven stone plate 2 horizontally. When sand is used, there is a problem that it takes time to process the sand after demolding. In addition, when paraffin is used as the fixing material 3, since the paraffin is solid at room temperature, the paraffin must be heated and melted when the stone plate 2 is set. There is a problem that paraffin adheres to the stone plate 2 and it takes time to remove it.
The present invention has been made in consideration of the above points, and an object of the present invention is to provide a method for producing a stone cast-in precast concrete board capable of simplifying work.
[0005]
[Means for Solving the Problems]
The invention according to claim 1 is a method of manufacturing a precast concrete board in which a stone board is driven into the surface, and first, a plurality of columnar spacers made of polystyrene foam are attached to the surface of the stone board to be driven, and the plurality of spacers are attached. After cutting with heat rays and aligning the height, the stone plate is set in the mold so that the spacer is on the lower side, and the outer periphery of the stone plate and another stone plate or the side surface of the mold The gap is closed with a filler, and then concrete is placed on the stone plate and the upper surface side of the filler. After the concrete is hardened, the mold is removed and the filler is removed.
[0006]
The invention according to claim 2 is the method for producing a stone plate precast concrete plate according to claim 1, wherein when the stone plate is set in the mold, the filler is filled in the bottom of the mold. A sponge is attached, and the outer periphery of the stone plate is placed on the sponge.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment of a method for producing a slab driven precast concrete board according to the present invention will be described with reference to FIGS. 1 to 4. In the following description, the same reference numerals are given to portions common to FIG. 5 shown as the conventional example.
[0008]
As shown in FIG. 1 (a), the stone plate 2 to be driven has a surface 2a side that is uneven like a natural stone, and a back surface 2b side that is shaped flat. Moreover, the outer peripheral shape is also left unshaped like a natural stone. A plurality of spacers 10 are attached to the surface 2a of the stone plate 2 with an adhesive. Each spacer 10 is made of polystyrene foam and has a columnar shape having a certain height. At this time, since the surface 2a of the stone plate 2 has irregularities like natural stone, the height of the attached spacers 10, 10,...
[0009]
Next, as shown in FIG. 1B, the heights of the spacers 10, 10,. The hot wire device 11 includes rails 12 and 12 for moving the stone plate 2 in the horizontal direction, and has a configuration in which a hot wire 13 is installed at a predetermined height above the rails 12 and 12. The stone plate 2 is placed on the rails 12 and 12 of the heat ray device 11 such that the surface 2a side is on the upper side, and this is moved in the horizontal direction. Then, the spacers 10, 10,... Are cut by the hot wire 13 heated to a predetermined temperature or higher, and the heights of all the spacers 10 are aligned and parallel to the back surface 2b of the stone plate 2.
[0010]
Subsequently, as shown in FIGS. 2 and 3, when a predetermined number of stone plates 2 are set on the bottom slab 14a of the plan view-shaped mold 14 assembled to a predetermined size, the stone plates 2 and 2 are adjacent to each other. Sponge 15 is attached to the joint.
[0011]
Next, as shown in FIG. 4, a stone plate 2 on which a medicine 16 for preventing white bloom is applied on the back surface 2 b side and a fixing metal 17 is further attached is placed so that the front surface 2 a is on the lower side. Set in frame 14. Then, as shown in FIGS. 2 to 4, each stone plate 2 is set with the spacers 10, 10,... Standing on the bottom slab 14 a of the mold 14, and the back surface 2 b thereof being in a horizontal state. Further, as shown in FIGS. 2 and 3, the outer peripheral end of the stone plate 2 on the surface 2a side is located on the sponge 15 previously attached, and the sponge 15 is deformed to deform the surface 2a. It will be in the state which adhered to.
[0012]
After a predetermined number of stone plates 2 are set in the mold 14 in this way, sand (filler) 18 is filled on the sponge 15 between the stone plates 2 and 2 adjacent to each other. The joint depth between the stone plates 2 and 2 is adjusted by adjusting the filling amount of the sand 18.
Further, as shown in FIGS. 2 and 4, the stone plate 2 in contact with the side plate 14b of the formwork 14 is provided on the back surface 2b in order to prevent the concrete C to be placed thereafter from wrapping around the surface 2a of the stone plate 2. The joint sealing material 19 is set in
[0013]
Thereafter, concrete C such as high fluidity concrete is placed in the mold 14 to a predetermined level.
Then, after the placed concrete C is hardened and exhibits a predetermined strength, the mold 14 is disassembled and demolded, so that the stone plate-injected PC plate 20 having the stone plates 2, 2,. Is formed. In this state, since the spacers 10 are still adhered to the surfaces of the stone plates 2, the spacers 10 are removed before using the stone plate driving PC plates 20.
[0014]
As described above, in the manufacturing method of the stone plate driving PC plate 20, a plurality of polystyrene foam spacers 10 are bonded to the surface of the stone plate 2, the spacers 10 are cut with the hot wire 13, and the height is aligned. The stone plate 2 is set therein, and then the concrete C is placed therein, whereby the stone plate driving PC plate 20 is manufactured. By attaching the columnar spacer 10 to the stone plate 2 in this way, it is possible to easily set the stone plate 2 in the mold 14 as compared with the case where sand or paraffin is used as in the prior art. It becomes possible. Therefore, it is possible to simplify the manufacture of the stone board driving PC board 20. And since this spacer 10 is a product made from a polystyrene foam, even if it is the stone board 2 whose surface is uneven | corrugated, height can be equalized easily by cut | disconnecting the spacer 10 with the hot wire 13. FIG.
[0015]
In order to form joints, the sponge 15 is set on the bottom plate 14 a in the mold 14, the outer periphery of the stone plate 2 is placed on the sponge 15, and the sand 18 is filled. Thereby, since the sponge 15 adheres to the surface of the uneven stone plate 2 due to the deformation, the sand 18 can be prevented from leaking downward, and joints can be easily formed.
[0016]
In addition to this, if the spacer 10 is attached to the stone plate 2 and the height thereof is aligned, the surface of the stone plate 2 is damaged even when the stone plate driving PC plate 20 is stored. It is also possible to pile up the stone plates 2. Further, even after the stone plate driving PC plate 20 is manufactured, if the spacer 10 is left attached and removed immediately before the construction, the surface of the stone plate 2 may be damaged during transportation or handling. Can be prevented.
[0017]
In the above-described embodiment, the outer peripheral shape of the stone plate 2 to be driven is irregularly shaped like natural stone. However, even when a polygonal shaped one is used, it can be applied in the same manner as described above. It is.
Moreover, although the sand 18 was used as a filler, other materials may be used as long as the concrete C is prevented from entering and the processing at the time of demolding is easy.
Further, the sponge 15 is not intended to limit the material as long as it is in close contact with the surface of the stone plate 2 by deformation thereof, and may be, for example, sponge or urethane foam.
In addition, a joint sealing material 19 is set on the stone plate 2 in contact with the side plate 14b of the formwork 14 to prevent the concrete C from wrapping around the surface 2a of the stone plate 2. Sand 18 may be used.
In addition to this, as long as it does not depart from the gist of the present invention, there is no question about the outer diameter shape of the stone plate driving PC plate 20, the material of the stone plate 2 or the concrete C, etc. You may make it use what was done.
[0018]
【The invention's effect】
As described above, according to the method for manufacturing a stone board-driving PC board according to claim 1, after mounting a plurality of columnar spacers made of foamed polystyrene on the surface of the stone board, and cutting the spacers with heat rays to align the heights Set the stone plate in the mold so that the spacer is on the lower side, close the gap between the outer periphery of the stone plate and the side of the mold or other stone plate with a filler such as sand, and then place concrete By doing so, it is configured to produce a stone board driving PC board. By attaching the columnar spacers to the stone plate in this way, it is possible to easily set the stone plate into the mold as compared with the case where sand or paraffin is used as in the past. And since this spacer is a product made from a styrene foam, even if it is a stone plate with the surface unevenness | corrugation, height can be arrange | equalized easily by cut | disconnecting a spacer with a heat ray. In this way, it is possible to simplify the manufacture of the stone board driving PC board.
In addition to this, if a spacer is attached to the stone plate and the height is aligned, even if the stone plate is stored until it is used, the stone plate surface is prevented from being scratched and the stone plate is stacked. Is also possible. Further, even after the stone plate driving PC plate is manufactured, if the spacer is left attached, the surface of the stone plate can be similarly prevented from being damaged.
[0019]
According to the method for manufacturing a stone board driving PC board according to claim 2, a sponge is set on the bottom surface in the mold, and the outer periphery of the stone board is placed on the sponge.
As a result, even if there is unevenness on the surface of the stone plate, the sponge deforms and adheres closely to the surface of the stone plate, so that fillers such as sand for forming joints do not leak downward, making it easy to form joints Can be done.
[Brief description of the drawings]
FIG. 1 is a view showing an example of a method for producing a stone board driving PC board according to the present invention, and is an elevational sectional view showing a process of attaching a spacer to a stone board and aligning the height thereof.
FIG. 2 is an elevational sectional view showing a state in which a stone plate attached with a spacer is set on a mold.
FIG. 3 is an enlarged vertical sectional view showing a part of FIG. 2;
4 is an enlarged vertical sectional view showing another part of FIG. 2; FIG.
FIG. 5 is an elevational sectional view showing an example of a conventional method for producing a stone board driving PC board.
[Explanation of symbols]
2 Stone board 10 Spacer 13 Heat wire 14 Form 15 Sponge 18 Sand (filler)
20 Stone board driving PC board C Concrete

Claims (2)

A method for producing a precast concrete board in which a stone plate is driven into a surface, first, a plurality of columnar spacers made of polystyrene foam are attached to the surface of the stone plate to be driven, and the height of the plurality of spacers is cut by heat rays. After aligning
Set the stone plate in the mold so that the spacer is on the lower side, close the gap between the outer periphery of the stone plate and the other stone plate or the side surface of the mold with a filler,
After this, the concrete is placed on the upper surface side of the stone plate and filler,
A method for producing a precast concrete board driven by stone, wherein the mold is removed after the concrete is hardened and the filler is removed. 2. The method for producing a precast concrete board according to claim 1, wherein when the stone board is set in the mold, a sponge is attached to a position where the filler is filled on the bottom surface of the mold, A method for producing a precast concrete board driven by stone board, wherein the outer periphery of the stone board is placed thereon.

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