JPH01210311A - Method and apparatus for manufacturing drain bin - Google Patents

Abstract

PURPOSE:To make it possible to use an inverted mold as many times as the durability of the inverted mold permits by separating the inverted mold from a drain bin by a method wherein molding material is filled by pouring in the space above a drain bin production unit having the specified inverted mold and cured and drawn from the mold and finally said inverted mold is removed from the drain bin. CONSTITUTION:The inverted mold 7 of the drain bin production unit concerned has an external shape, the external peripheral edge 71 of which does not extend beyond the outer peripheral edge 212 of the bearing surface 211 of the bearing part 21 under the condition that the inverted mold 7 is arranged under the predetermined state onto the bearing surface 211 of the bearing part 21 constituting an inner frame 2. When a drain bin is intended to be manufactured, molding material 6 such as concrete or the like is cast as indicated with the arrows (a) from the upper opening face of the outer frame 1 under the state that the inverted mold 7 is put upside down onto the bearing surface 211 of the bearing part 21 and solidified. Though the molding material 6 fills an annular space and above the inverted mold 7, the external peripheral edge 71 of the inverted mold 7 does not be inserted in the interior of the molding material 6, since the external peripheral edge 71 of the inverted mold 7 does snot extend beyond the external peripheral edge 212 of the bearing part 21. Next, the outer frame 1 and the inner frame 2 are removed. Finally, the inverted mold 7 is removed in order to obtain a concrete drain bin.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a method and apparatus for manufacturing a drainage basin such as a sewage basin, in which an inner formwork is arranged inside an outer formwork with an annular space interposed therebetween; A drainage basin manufacturing device is used, in which an invert mold whose outer periphery does not protrude outward from the outer periphery of the receiving surface is placed face down on the receiving surface of the receiving part placed on the upper part of the inner formwork, and the molded material is After injecting, curing, and cutting out the mold, the invert mold is removed to obtain a drainage basin, making it possible to manufacture drainage basins with an invert at the bottom at low cost without wasting materials. This is what I did.

<Prior Art> FIG. 10 is a sectional view of a conventional drainage basin manufacturing apparatus. In the figure, 1 is an outer form made of cylindrical iron or the like that has been subjected to concrete release treatment, and 2 is an inner form. The inner formwork 2 is arranged in a cylindrical shape inside the outer formwork 1 with an annular space 3 serving as a space for injecting a molding material such as concrete between the inner peripheral surface of the outer formwork 1 and the inner peripheral surface of the outer formwork 1. . This inner formwork 2 has an annular space 3 between a receiving part 21 for receiving the invert mold and the inner peripheral surface of the outer formwork 1.
A frame portion 22 forming a frame portion 22 is provided. The receiving part 21 is the frame part 2
Support member 2 such as an angle fixedly provided inside 2
It is supported by 3. 4 is the base.

To manufacture a drainage basin using the above drainage basin manufacturing equipment,
As shown in FIG. 11, an invert mold 5 for a drainage basin made of a synthetic resin molded body is placed face down on the receiving surface 211 of the receiving part 21, and from the upper opening surface of the outer form 1, As shown in (a), concrete or other forming material is poured and solidified. Thereafter, when the outer formwork 1 and the inner formwork 2 are removed, a drainage basin is obtained in which an invert mold 5 made of a synthetic resin molded body is integrally embedded in the bottom part.

As shown in FIG. 12, the invert mold 5 is a synthetic resin molded body having a bottom portion 51 and an outer wall portion 52 raised along its outer periphery. Channel 512.5 descending from surface 511 to a predetermined depth
13, and the ends of the channels 512 and 513 are connected to the openings 514.
．． 515 and 516, respectively.

Figure 13 uses the invert type 5 shown in Figure 12, and
FIG. 14 is a plan view of the drainage basin obtained by the drainage basin manufacturing apparatus shown in FIG.
It has a structure in which an invert mold 5 made of a synthetic resin molded body is embedded integrally. Openings 514 and 515 are used as wastewater inlets, and opening 516 is used as a wastewater outlet.

<Problems to be Solved by the Invention> As described above, in the conventional drainage basin manufacturing apparatus, the invert mold 5 is used as a type of waste mold that is directly incorporated into the basin main body as an invert part of the drainage basin. Invert type 5
As mentioned above, the product is a molded product made of plastic or the like with a complicated shape, and the product cost is high. Therefore, in the conventional technique in which the invert mold 5 is used as a waste mold, there is a problem in that the cost of the drainage basin is increased.

<Means for Solving the Problems> In order to solve the above-mentioned conventional problems, the drainage basin manufacturing method according to the present invention includes an outer mold and an annular space for injecting a molding material inside the outer mold. an inner frame type, which is placed face down on the receiving surface of the receiving section and whose outer periphery extends outward from the outer periphery of the receiving surface when placed in a predetermined state; Using a drainage basin manufacturing apparatus consisting of an invert mold having an external shape that does not protrude, molding material is injected and filled into the annular space of the drainage basin manufacturing apparatus and the upper space of the invert mold, hardened, and then removed from the mold. After carp fishing, the invert mold was removed to obtain a drainage basin.

As described above, in the drainage basin manufacturing method according to the present invention, the invert mold is removed after the molding material is injected and filled, cured, and cut out to obtain the drainage basin. It can be separated and used as many times as durability allows. Therefore, the product cost of the drainage basin becomes low.

Moreover, the invert type has an external shape in which the outer periphery does not protrude from the outer periphery of the receiving surface when placed in a predetermined state on the receiving surface of the receiving part placed at the upper end of the inner formwork. The outer periphery of the mold is not inserted into the molding material. Therefore, it is easy to remove the invert die in the final process, which simplifies the manufacturing process.

<Example> FIGS. 1 and 2 are cross-sectional views showing a drainage basin manufacturing apparatus and a drainage basin manufacturing method using the manufacturing apparatus according to the present invention.

In the figure, the same reference numerals as in FIG. 10 indicate the same components. 7 is an invert type, and 8 is a core. When the invert mold 7 is placed in a predetermined state on the receiving surface 211 of the receiving part 21 constituting the inner form frame 2, the outer peripheral edge 7
1 has an external shape that does not protrude from the outer peripheral edge 212 of the receiving surface 211 of the receiving portion 21. FIG. 3 shows an embodiment of the invert mold 7, in which the surface 7 is overlapped on the receiving surface 211 of the receiving portion 21.
Channels 73, 74 are provided which descend from the channel 2 at a predetermined depth, and the ends of the channels 72, 73 are communicated with the openings 75, 76 and 77, respectively. The ends of the flow paths 72, 73 may be closed without providing the openings 75 to 77.

In order to manufacture a drainage basin using the above-mentioned drainage basin manufacturing apparatus, as shown in FIG. 211
A molding material 6 such as concrete is poured into the outer formwork 1 from the upper opening surface of the outer formwork 1 as shown by the arrow (A) and solidified. As shown in FIG. 2, the molding material 6 is filled into the annular space and onto the invert mold 7, but since the outer peripheral edge 71 of the invert mold 7 does not come out from the outer peripheral edge 212 of the receiving part 21, the invert mold 7 is filled with the molding material 6. The outer peripheral edge 71 of the mold 7 is not inserted into the molded material 6.

Next, when the outer formwork 1 and the inner formwork 2 are removed, a drainage basin having an invert mold 7 made of a synthetic resin molded body at the bottom is obtained, as shown in FIGS. 4 and 5. 65 to 67 are openings obtained by the core 8 (see FIGS. 1 and 2). Furthermore, when the invert type 7 is removed from this drainage basin,
A concrete drainage basin shown in FIGS. 6 and 7 is obtained.

This drainage basin has a bottom part 61 of a basin body 6 made of concrete.
A flow channel 63 that descends from the step surface 62 to a predetermined depth on the inner surface of the
．． 64, and the end of the channel 63.64 is connected to an opening 65.6.
6 and 67, respectively.

When removing the invert mold 7 from the state shown in Figs. 4 and 5 to obtain the drainage basin shown in Figs. 6 and 7, the outer peripheral edge of the invert mold 7 is inserted into the concrete forming material. The invert mold 7 can be easily removed since it is not exposed to any damage.

FIG. 8 shows another embodiment of the drainage basin manufacturing apparatus according to the present invention. In the figure, the same reference numerals as in FIGS. 1 and 2 indicate the same components, and three screw holes 9 are provided at a position facing the support member 23 of the receiving part 21, for example, at an interval of 120 degrees. is provided through the receiving part 2 in the thickness direction.
Screw the bolts 10 into each screw hole 9 from the top side of 1,
The tip of the bolt 10 is brought into contact with the support member 23, and the receiving part 2
A tilt angle varying means for varying the tilt angle with respect to the horizontal plane is configured.

In the above configuration, when the bolt 10 is rotated using an appropriate jig, the receiving part 21 is rotated by the supporting member according to the amount and direction of rotation of the bolt 10 due to the threaded connection between the bolt 10 and the screw hole 9. It goes up and down with respect to 23. As a result,
The pedestal 21 is rotated depending on the amount and direction of rotation of the bolt 10.
The position changes from the position shown by the solid line (B) in FIG. 8 to the position shown by the dotted line (C), and is tilted at a certain angle with respect to the horizontal.

FIG. 9 shows a drainage basin manufactured using an aqueous phase manufacturing apparatus not shown in FIG. A drainage basin set to a value corresponding to the slope of the receiving portion 21 is obtained. Therefore, even if the external piping connection positions are different for the inlet and outlet,
Piping connections can be easily made.

<Effects of the Invention> As described above, according to the present invention, after injecting and filling the molding material, curing it, and further cutting out the mold, the invert mold is removed to obtain a drainage basin. It can be used as many times as durability allows. Therefore, the product cost of the drainage basin becomes cheaper.

Moreover, the invert mold has an external shape that does not protrude from the outer periphery of the receiving surface when placed in a predetermined state on the receiving surface of the receiving part placed at the upper end of the inner formwork. The outer edge of the mold is not inserted into the molding material. Therefore, it is easy to remove the invert die in the final process, and the manufacturing process is facilitated.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views showing a drainage basin manufacturing apparatus according to the present invention and a manufacturing method using the same, FIG. 3 is a perspective view of an invert type constituting the drainage basin manufacturing apparatus according to the present invention, and FIG. 4
The figure is a partial sectional plan view of a drainage basin manufactured by the drainage basin manufacturing method according to the present invention before removing the impact mold, Figure 5 is a sectional view taken along line A2-A2 in Figure 4, and Figure 6 is the invention FIG. 7 is a cross-sectional view taken along line A3-A3 in FIG. 6, and FIG. 8 is another embodiment of the drainage basin manufacturing apparatus according to the present invention. FIG. 9 is a sectional view of a drainage basin obtained using the drainage basin manufacturing apparatus shown in FIG. 8, FIG. 10 is a sectional view of a conventional drainage basin manufacturing apparatus, and FIG. Figure 12 is a perspective view of an inverted type, and Figure 13 is a plan view of a drainage basin obtained by a conventional drainage basin manufacturing apparatus.
FIG. 4 is a sectional view taken along the A+A+ edge line in FIG. 13. 1... Outer formwork 2... Inner formwork 21... Receiving part 22... Frame part 7... Invert type Fig. 1 Fig. 2 Fig. 4 Fig. 6 Fig. 7 Fig. 12 Figure 13 54 4; 1°

Claims (2)

[Claims] (1) An outer frame, an inner frame which is arranged inside the outer frame with an annular space for injecting the molding material and has a receiving part at its upper end; and an inverted type having an outer shape in which the outer peripheral edge does not protrude outside from the outer peripheral edge of the receiving surface when arranged in a predetermined state. A method for manufacturing a drainage basin, comprising injecting and filling a molding material into the space and the upper space of the invert mold, curing the molding material, and removing the mold, and then removing the invert mold to obtain a drainage basin. (2) an outer frame, an inner frame which is arranged inside the outer frame with an annular space for injecting the molding material and has a receiving part at its upper end; and an inverted type having an outer shape in which the outer peripheral edge does not protrude outside from the outer peripheral edge of the receiving surface when arranged and arranged in a predetermined state.