JP2007083533A - Manufacturing method of concrete secondary product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a concrete secondary product by which the concrete secondary product can be easily manufactured even wothout making a metal or plastic mold. <P>SOLUTION: The manufacturing method of the concrete secondary product comprises a step of winding an outer sheet around a mandrel, a step of loading the mandrel to a sand mold after the above step, a step of charging a sand into the sand mold after the above step, a step of removing the mandrel from the sand mold after the above step, a step of removing the outer sheet from the sand mold after the above step, a step of charging a concrete into the sand mold after the above step, and a step of disassembling the sand mold after the above step, and the concrete column with a pattern can be manufactured. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for producing a concrete secondary product, which can easily produce a concrete product without producing a metal or plastic formwork.

  Concrete secondary products such as concrete pillars and rooting blocks have been manufactured by placing concrete in a mold made of metal or plastic and curing the concrete.

As described in Patent Document 1, a core in which reinforcing bars are assembled after a spraying step of spraying cosmetic aggregate on the surface of the inner mold using a mold having an inner mold having an uneven surface on the inner surface. The invention of the manufacturing method of the cylindrical gate pillar with a pattern which casts the concrete thrown into the inside of a formwork while installing and rotating a formwork is also exhibited.
Japanese Patent Laid-Open No. 07-117024

  However, since the invention described in Patent Document 1 uses a metal or plastic mold as a mold, it takes cost and time to manufacture a large number of molds. Moreover, once a mold is manufactured, the shape cannot be easily changed.

  Then, this invention aims at providing the manufacturing method of the concrete secondary product which can manufacture a concrete product easily, without manufacturing metal and a plastic formwork.

  In order to solve the above problems, the present invention includes a step of winding an external sheet around a punching mold, a step of attaching the punching mold to the sand mold after the step, and a step of introducing sand into the sand mold after the step. A step of removing the punching mold from the sand mold after the step, a step of removing an external sheet from the sand mold after the step, a step of pouring concrete into the sand mold after the step, and a step of dismantling the sand mold after the step A concrete secondary product manufacturing method characterized in that a concrete pillar with a pattern can be manufactured, a process of embedding a protruding part punching mold into the sand, and a body punching mold after the process A step of pulling out the protrusion-extruded mold after the step and placing concrete, a step of placing the concrete in the body-extracted mold after the step, and the step Manufacturing a complex-shaped solidification block comprising the steps of installing a leg-extracting mold on the base, a step of placing concrete on the leg-extracting mold after the step, and a step of curing the concrete after the step. It was set as the structure of the manufacturing method of the concrete secondary product characterized by being able to do.

  Since this invention is the above structure, the following effects are acquired. First, since the mold is generated from sand, a secondary concrete product having a complicated shape and pattern can be easily manufactured. In addition, it is possible to easily cope with slight design changes.

  Second, once the mold is formed of sand with the mold, the mold can be removed without waiting for the concrete to harden, so there is no need to prepare many molds. Moreover, since the restraint time of a formwork is short, it can manufacture as many as a day.

  Thirdly, the mold is used to form a mold with sand, and since the sand is only attached to the mold, it can be washed only with water. Moreover, it is not necessary to apply a release agent for preventing adhesion of concrete.

  Fourth, if the air in the concrete does not escape, a fluffy chipped portion is generated on the surface. However, since air escapes from the gaps in the sand, the chipped portion does not occur on the surface. Moreover, it becomes a warm appearance by the material of sand.

  The object of the present invention is to easily manufacture a concrete product without manufacturing a metal or plastic mold, a step of winding an external sheet around the punching mold, and a mounting of the punching mold on the sand mold after the process. A step of throwing sand into the sand mold after the step, a step of extracting the punching mold from the sand mold after the step, a step of removing an external sheet from the sand mold after the step, and a concrete in the sand mold after the step And a step of dismantling the sand mold after the above-mentioned process, and a concrete pillar with a pattern can be manufactured. Embedding in the process, installing the main body punching mold after the process, pulling out the protruding part punching mold after the process, and placing the concrete, A step of placing concrete in the body-extracting mold later, a step of installing a leg-extracting mold after the step, a step of placing concrete in the leg-extracting mold after the step, and a concrete after the step This was realized by a method for producing a secondary concrete product characterized by comprising a curing step and capable of producing a root block with a complicated shape.

  Below, based on an accompanying drawing, the manufacturing method of the concrete secondary product which is the present invention is explained in detail.

  The method for producing a concrete secondary product includes a step of winding an external sheet around a punching mold, a step of attaching the punching mold to the sand mold after the step, a step of introducing sand into the sand mold after the step, and the step A step of removing the punching mold from the sand mold later, a step of removing the external sheet from the sand mold after the step, a step of pouring concrete into the sand mold after the step, and a step of dismantling the sand mold after the step, A concrete pillar with a pattern can be manufactured.

  In the concrete column manufacturing method 1, the step of winding the outer sheet around the punching mold is the first step, the process of attaching the punching mold to the sand mold is the second process, and the step of putting sand into the sand mold is the third. 4th process, 5th process for removing the outer sheet from the sand mold, 6th process for pouring concrete into the sand mold, 7th process for dismantling the sand mold Let it be a process.

  FIG. 1 is a view showing an example of an instrument used in the method for manufacturing a concrete column according to the present invention, and FIG. 2 is a front view of a punching mold frame used in the method for manufacturing a concrete column according to the present invention.

  In the concrete column manufacturing method 1, the tools of the punching mold 2, the outer sheet 3, and the sand mold 4 are used. The punching mold 2 is provided with two hooking holes 2b in the upper part of a cylindrical inner tube 2a made of plastic or the like.

  The external sheet 3 is a sheet in which a pattern 3b is formed by silicon rubber 3a. The sand mold 4 is obtained by dividing the inside of a bucket-shaped main body 4a, which is a container for containing sand, into two parts by a partition plate 4c, and providing fixing screws 4b at two upper portions of the outer peripheral surface. The partition plate 4c and the fixing screw 4b may not be provided.

  FIG. 3 is a diagram showing a step (first step) of winding an external sheet around a punching mold of the method for manufacturing a concrete pillar according to the present invention.

  In the first step, the outer sheet 3 is wound around the punching mold 2 and the pattern 3 b is attached to the surface of the punching mold 2. In addition, the external sheet 3 is made to be able to be lightly fastened without being bonded to the punching mold 2 and is made removable.

  The punching frame 2 with the outer sheet 3 becomes the shape of the concrete pillar 11. Since the external sheet 3 can be easily generated, various concrete pillars 11 can be manufactured by changing the pattern 3 b of the external sheet 3.

  FIG. 4 is a diagram showing a process of mounting the punching mold frame of the concrete column manufacturing method according to the present invention on a sand mold frame, and FIG. 5 is a diagram illustrating the concrete mold manufacturing method according to the present invention. FIG. 6 is a plan view showing a state in which a punching mold is mounted on a sand mold in the method for manufacturing a concrete pillar according to the present invention.

  In the second step, the punching mold 2 with the external sheet 3 is installed in the sand mold 4. In the case of FIG. 4, since the inside of the sand mold 4 is divided into two, it is possible to install two punching molds 2, but it is also possible to increase the number of sand molds 4 by increasing the size. is there.

  FIG. 7 is a diagram showing a step of putting sand into the sand mold of the concrete column manufacturing method according to the present invention, and FIG. 8 is a diagram showing sand injected into the sand mold in the concrete column manufacturing method of the present invention. It is a figure which shows a state.

  In the third step, the sand 6 is put into the sand mold 4 using the scoop 5 and the sand 6 is filled around the punching mold 2. The shape of the pattern 3 b of the external sheet 3 is transferred to the sand 6 by hardening the sand 6.

  The sand 6 to be added is a mixture of clay such as bentonite, and is less likely to collapse by increasing the water content. Moreover, it becomes easy to form a fine pattern by using a small particle (for example, cinnabar).

  FIG. 9 is a diagram illustrating a process of extracting a punching mold from the sand mold of the concrete pillar manufacturing method according to the present invention, and FIG. 10 is a diagram illustrating a step of removing the punching mold from the sand mold in the concrete pillar manufacturing method according to the present invention. It is a figure which shows the state extracted.

  In the fourth step, only the punching mold 2 is first extracted from the sand mold 4 while leaving the outer sheet 3 in the sand of the sand mold 4. Since the surface of the inner tube 2a of the punching mold 2 is smooth, it can be easily pulled out.

  FIG. 11 is a diagram showing a step of taking out the external sheet from the sand mold of the concrete column manufacturing method according to the present invention, and FIG. 12 is a drawing of the external sheet from the sand mold in the concrete column manufacturing method according to the present invention. It is a figure which shows a state.

  In the fifth step, the outer sheet 3 is gently removed so as not to break the sand 6. The pattern 3b of the outer sheet 3 remains inside the hole 6a generated in the place where the punching mold 2 and the outer sheet 3 were present.

  FIG. 13 is a diagram showing a process of pouring concrete into the sand mold of the concrete column manufacturing method according to the present invention, and FIG. 14 shows a situation in which the poured concrete is compacted in the concrete column manufacturing method according to the present invention. FIG.

  In the sixth step, the sand mold 4 is covered with a lid 7, and concrete 9 is poured into the holes 6 a of the sand 6 with a scoop 5. The concrete 9 is compacted using a compacting machine 10 so that no air remains in the concrete 9.

  The lid 7 is a disc-shaped lid plate 7a having a circular hole 7b. The holes 7 b are placed in the concrete 9 from the holes 7 b to the holes 6 a of the sand 6 in accordance with the positions of the holes 6 a of the sand 6. In order to hold down the lid 7, a holding plate 8 is used.

  FIG. 15 is a diagram illustrating a step of dismantling the sand mold of the concrete column manufacturing method according to the present invention, and FIG. 16 is a diagram illustrating a concrete column completed by the concrete column manufacturing method according to the present invention.

  In the seventh step, when the concrete 9 is hardened, the fixing screw 4b of the sand mold 4 is removed and dismantled, and the sand 6 is broken and the concrete pillar 11 is taken out. On the surface of the pillar 11 a of the concrete pillar 11, the same pattern 11 b as the pattern 3 b of the outer sheet 3 is formed.

  Usually, it takes about 3 days for the concrete 9 to harden. However, since the punching frame 2 and the outer sheet 3 are removed before pouring the concrete 9, it is possible to manufacture another concrete pillar 11 without waiting for the concrete 9 to harden. Can be used.

  For example, in the past, when 1000 concrete pillars 11 were manufactured in 30 days, 100 molds were required. However, in the present invention, 10 to 10 molds can be manufactured per day. If there is.

  When concrete 9 was poured directly into the mold, it was necessary to wash the concrete 9 adhered to the mold with a wire brush or the like, or to apply a release agent to prevent adhesion. Since it only transfers, washing with water is sufficient.

  When the concrete 9 is compacted, if there is no escape route for the escaped air, a defect portion may be generated on the surface of the concrete column 11. However, since air escapes from the voids of the sand 6, no defect portion is generated on the surface.

  Between the fifth step and the sixth step, by using a cylindrical member that is slightly smaller than the punching mold frame 2, it is arranged at the center of the hole 6a of the sand 6 and filled with the sand 6 and then removed. It is also possible to produce a tubular concrete column 11.

  The method for producing a concrete secondary product includes a step of embedding a protruding portion mold in sand, a step of installing a main body punching mold after the step, and a step of extracting the protruding portion mold after the step and placing concrete. A step, a step of placing concrete in a body punching mold after the step, a step of installing a leg punching mold after the step, and a step of placing concrete in the leg punching mold after the step; It comprises a step of curing the concrete after the step, and it is characterized in that a complex-shaped root block can be manufactured.

  In addition, in the manufacturing method 1a of the root-set block, the step of embedding the protruding portion mold in the sand is the first step, the step of installing the main body punching mold is the second step, and the concrete is punched out of the protruding portion. The third step is the step of placing, the fourth step of placing the concrete in the main body punching mold, the fifth step of placing the leg punching mold, and the step of placing concrete in the leg punching mold Is the sixth step, and the step of curing the concrete is the seventh step.

  FIG. 17 is a diagram showing an example of an instrument used in the method for manufacturing a root block according to the present invention.

  In the manufacturing method 1a of the root-sealing block, a leg-extracting mold frame 12, which is a mold of each part of the root-blocking block, a protrusion-extracting mold frame 13, and a main body-extracting mold frame 14 including an edge member 15 and a frame member 16 Are used in combination.

  The leg-extracting mold 12 has four circular holes in the holding plate 12a, and the holding plate 12c is slightly heightened by a support plate 12c, and a cylindrical tube 12b is passed through each of the four holes. It is a thing.

  The protruding part mold 13 is provided with a tapered part 13b on the upper part of a cylindrical tube 13a. Since the tapered portion 13b is attached so as to be wound around the outer peripheral surface of the cylindrical body 13a, the cylindrical body 13a is present inside the inner peripheral surface of the tapered portion 13b.

  Since the outer peripheral surface of the protruding portion forming frame 13 has the shape of the protruding portion 21a of the block 21, the lower surface is in a state where the hole is closed. Moreover, it is necessary to make it the shape which expands from the bottom so that the sand 17 may not be destroyed.

  The edge member 15 of the body punching mold 14 includes a plate-like edge plate 15a having a rectangular hole in the center, an end 15b attached along the rectangular hole, and a gripping part 15c attached to the corner of the rectangular hole. , A presser bar 15d mounted on the edge plate 15a, and a corner 15e provided at a corner of the rectangular hole.

  The frame member 16 of the body punching mold frame 14 includes a rectangular frame plate 16a that hangs down from a rectangular hole of the edge member 15, and a curved portion 16b in which the four corners of the frame plate 16a are rounded. The inside of the frame plate 16a is the shape of the main body 21b of the root block 21.

  FIG. 18 is a diagram showing a process of embedding a protruding portion punching mold of the rooting block manufacturing method according to the present invention in sand, and FIG. 19 is a protruding portion punching die in the rooting block manufacturing method according to the present invention. It is a figure which shows the state which embedded the frame in sand.

  In the first step, the protruding portion mold 13 is embedded in the sand 17 so that the tapered portion 13b is on the upper side. Although it is not necessary to use the sand mold 4 as in the first embodiment, a sand ground capable of embedding the protruding part mold 13 is prepared.

  FIG. 20 is a diagram showing a process of installing a main body punching mold of the manufacturing method of the rooting block according to the present invention.

  In the second step, the main body punching mold 14 is placed on the sand 17 so that the protruding part punching mold 13 is in the center, and the sand 17 is thrown into the outside of the frame member 16. The sand 17 is not put inside the frame member 16 but is buried in the sand 17 up to the bottom of the edge member 15.

  FIG. 21 is a diagram showing a step of drawing concrete from a protruding portion punching frame in the method for manufacturing a root-set block according to the present invention.

  In the third step, the protruding part punching mold 13 is pulled out of the sand 17 and the concrete 18 is poured into the place where the protruding part punching mold 13 was present. The protrusion-extracted mold 13 that has been pulled out can be used for the manufacture of the next root block 21.

  FIG. 22 is a diagram showing a process of placing concrete in a main body punching mold of the manufacturing method of the rooting block according to the present invention, and FIG. 23 is a main body punching die in the manufacturing method of the rooting block according to the present invention. It is a figure which shows the state which pulled out the frame.

  In the fourth step, concrete 18 is poured into the inside of the frame member 16 of the main body punching mold 14. When the concrete 18 is placed, the body punching mold 14 is pulled out by holding the gripping portions 15 c at the four corners of the edge member 15.

  FIG. 24 is a diagram showing a step of installing a leg part punching mold in the manufacturing method of the rooting block according to the present invention.

  In the fifth step, the leg-extracted mold 12 is installed on the concrete 18. The four cylinders 12b pass through the holes 12d of the pressing plate 12a and are disposed on the concrete 18. Sand 17 is filled between the concrete 18 and the pressing plate 12a, and the outer periphery of the cylindrical body 12b is covered with the sand 17.

  FIG. 25 is a diagram showing a step of placing concrete in a leg-extracting mold of the manufacturing method of the rooting block according to the present invention.

  In the sixth step, only the cylindrical body 12b of the leg part mold 12 is pulled out, and the concrete 18 is poured into the hole 12d. When the concrete 18 is placed in the four holes 12d, the holding plate 19 is held and the holding plate 12a is removed.

  FIG. 26 is a diagram showing a process of curing concrete in the manufacturing method of the root-solidifying block according to the present invention, and FIG. 27 is a diagram showing the root-solidifying block completed by the manufacturing method of the root-solidifying block according to the present invention. is there.

  In the seventh step, the sand 17 is sprinkled on the concrete 18 exposed on the sand 17 by using a sieve 20 so that the concrete 18 is sufficiently cured. When the concrete 18 is hardened, the root block 21 is taken out from the sand 17.

  By molding the concrete 18 through the steps of the protrusion 21a, the main body 21b, and the leg 21d, it is easy even with a complex-shaped rooting block 21, such as providing a taper on the protrusion 21a and a corner 21c on the main body 21b. Can be manufactured.

  FIG. 28 is a flowchart showing the manufacturing process of the manufacturing method of the root block according to the present invention. The manufacturing method 1b of the root hardening block includes a leveling step 22, a projecting portion excavation step 23, a main body formwork embedding step 24, a first raw component placement step 25, a leg portion formwork placement step 26, and a second raw component placement step 27. Consists of.

  The leveling step 22 is a step of preparing to bury the formwork of the root block 28 by shaping the sand ground flat. Note that sand 38 is used as a mold of the root hardening block 28, and the mold is used for forming a mold on the sand 38.

  The protruding portion excavation step 23 is a step of installing the mold of the protruding portion 29 of the root block 28 while digging sand. Since the root block 28 is manufactured in a downward direction, the mold of the protrusion 29 is formed first.

  The main body mold embedding step 24 is a step in which the mold of the main body 30 of the root block 28 is placed on the sand and the surroundings are filled with sand 38. Since the protrusion 29 is already installed and the main body 30 is large in size, the mold is formed by filling instead of digging.

  The first raw concrete placing process 25 is a process in which the ready-mixed concrete 39 is poured into the mold frame of the projection 29 of the root block 28 and the mold frame of the main body 30. Since the lower projection 29 has a smaller area than the main body 30, it can be driven simultaneously.

  The leg formwork installation step 26 is a step of installing the formwork of the leg 31 of the root block 28 on the main body 30. Since the leg part 31 has a smaller area than the main body 30, the mold of the leg part 31 is formed after the concrete of the main body 30 is cast.

  The second raw concrete placing step 27 is a step of pouring the ready-mixed concrete 39 into the inside of the mold of the leg portion 31 of the root hardening block 28. By covering the whole with sand 38 and curing the concrete, the root block 28 is completed.

  FIG. 29 is a diagram showing a root block manufactured by the method for manufacturing a root block according to the present invention. The upper diagram is a front view of the root block 28, and the lower diagram is a perspective view of the root block 28.

  The root block 28 includes a protrusion 29, a main body 30, and a leg 31. One protrusion 29 is a cylindrical member, and one protrusion 29 is attached to the center of the upper surface of the main body 30. The leg portions 31 are columnar members and are attached to the lower side of the main body 30.

  The main body 30 is a substantially rectangular parallelepiped member. Although the plane is substantially square, the design can be changed, and the shape can be complicated by rounding corners, conversely rounding, or partly concave sides.

  By arranging the four leg portions 31 evenly, the entire root block 28 can be supported. Moreover, it is also possible to pile up up and down by inserting the projection part 29 of another root hardening block 28 between the leg parts 31. FIG.

  FIG. 30 is a diagram showing a cylindrical frame used in the method for manufacturing a root block according to the present invention. The upper figure is a cylindrical mold 32, and the lower figure is a projection protection plate 33, which is used for forming the mold of the projection 29.

  The cylindrical mold 32 is a cylindrical mold 32a having a through hole 32b therein. The protrusion protection plate 33 is a square protection plate 33a having a hole 33b having the same size as the cylindrical frame 32 in the center.

  After the cylindrical frame 32 is installed in the sand 38, the protruding portion protection plate 33 is placed on the upper side of the cylindrical frame 32 so that the hole 33b of the protruding portion protection plate 33 fits the through hole 32b of the cylindrical frame 32. This prevents the corner sand 38 from collapsing.

  FIG. 31 is a diagram showing a main body mold used in the manufacturing method of the root block according to the present invention. In addition, the upper figure is the main body formwork 34, and the lower figure is the main body protection plate 35, which is used for forming the mold of the main body 30.

  The main body mold 34 is a mold 34a having a through hole 34b therein. In addition, a curved portion 34d that is rounded and recessed is provided at the corner of the mold 34a, and a concave portion 34c that is partially recessed is provided on the side of the mold 34a.

  The main body protection plate 35 is a protection plate 35a having a hole 35b of the same size as the main body mold 34 in the center. As with the main body mold 34, a concave portion 35c is provided at the corner of the main body protection plate 35, and a curved portion 35d is provided at the side.

  After the main body mold 34 is installed and filled with sand 38, the main body protection plate 35 is placed on the upper side of the main body mold 34 so that the hole 35b of the main body protection plate 35 fits the through hole 34b of the main body mold 34. This prevents the corner sand 38 from collapsing.

  FIG. 32 is a diagram showing a leg mold used in the manufacturing method of the root block according to the present invention. In addition, the upper figure is the leg part formwork 36, and the lower figure is the leg part protection plate 37, which is used for forming the mold of the leg part 31.

  The leg mold 36 is a cylindrical mold 36a having a through hole 36b therein. A grip portion 36c for holding by hand is attached to the inner upper portion, and a lid 36d for closing the upper surface is also provided.

  The leg protection plate 37 is a protection plate 37a having a hole 37b of the same size as the leg mold 36 in the center. The same number of leg protection plates 37 as the leg molds 36 are prepared. Since four leg molds 36 are used, four leg protection plates 37 are also provided.

  FIG. 33 is a diagram showing a protrusion excavation step of the method for manufacturing a root block according to the present invention. In addition, the upper figure is excavation 23a, and the lower figure is shaping 23b. Prior to the protrusion excavation step 23, the sand is flattened in advance by the leveling step 22.

  Sand 38 of sand is a mixture of small particles such as dredged sand and clay such as bentonite. The mold of the root block 28 is formed by utilizing the fact that it becomes difficult to collapse when the water content is increased.

  The excavation 23 a is configured by installing a cylindrical frame 32 on the leveled sand 38 and a projection protection plate 33 so as to surround the cylindrical frame 32, and pushing down the cylindrical frame 32 into the sand 38. A hole is dug by removing the sand 38 inside the cylindrical mold 32.

  When the shaping 23b is embedded until the upper end of the cylindrical frame 32 comes to the position of the protruding portion protection plate 33, the bottom surface of the placing portion 38a formed by removing the sand 38 in the cylindrical frame 32, that is, the protruding portion. The part which becomes the front-end | tip of 29 is made flat using the shaping tool 23c.

  FIG. 34 is a diagram showing a main body form embedment process of the manufacturing method of the rooting block according to the present invention. The upper figure is the mold installation 24a, and the lower figure is the burying 24b. The main body mold embedding step 24 is performed after the protrusion excavation step 23.

  The formwork installation 24 a places the main body formwork 34 on the outer sand 38 on which the cylindrical formwork 32 and the protrusion protection plate 33 are installed. In addition, the inside of the cylindrical mold 32 and the main body mold 34 is a concrete placement place 38a.

  The burying 24 b fills the outer periphery of the main body mold 34 placed on the sand 38 with the sand 38 up to the upper end of the main body mold 34. After the main body mold 34 is filled, the main body protection plate 35 is installed so as to surround the upper edge of the main body mold 34.

  FIG. 35 is a diagram showing a first raw component placing step of the manufacturing method of the root block according to the present invention. In addition, the upper figure is the protrusion placement 25a, and the lower figure is the main body placement 25b. The first live concrete placing process 25 is performed after the projecting part excavation process 23 and the main body mold embedding process 24.

  The protruding portion placement 25a pours the ready-mixed concrete 39 into a portion that hits the protruding portion 29 in the placement portion 38a. The cylindrical frame 32 may be pulled out before flowing the ready-mixed concrete 39, or may be pulled out while compacting the poured concrete.

  The main body placement 25b removes the projection protection plate 33 when the projection 29 is placed, and pours the ready-mixed concrete 39 into a portion of the placement portion 38a that contacts the main body 30. The main body form 34 is pulled out before flowing the ready-mixed concrete 39 or while compacting the concrete.

  For compacting the ready-mixed concrete 39, a device such as a concrete vibrator 25c is used. When the surface of the sand 38 is placed, the ready-mixed concrete 39 is leveled along the main body protection plate 35, and then the main body protection plate 35 is removed.

  FIG. 36 is a diagram showing a leg formwork installation step of the manufacturing method of the rooting block according to the present invention. In addition, the upper figure is the formwork installation 26a, and the lower figure is the embedding 26b. The leg formwork installation step 26 is performed after the first raw component placement step 25.

  In the mold installation 26a, four leg molds 36 are placed on the main body 30 on which the ready-mixed concrete 39 is placed, and the upper surface is covered with a lid 36d. This is to prevent the sand 38 from spreading around the leg mold 36.

  The embedding 26 b scatters sand 38 around the leg formwork 36 to fill the leg formwork 36. When the sand 38 is filled around the leg mold 36, the lid 36 d is removed, and the leg protection plate 37 is installed so as to surround the upper edge of the leg mold 36.

  A sieve 26c is used for spreading the sand 38. This is because the ready-mixed concrete 39 is not yet completely hardened and is thus uniformly distributed so that the ready-mixed concrete 39 is not recessed. When the surface is covered, the upper end of the leg mold 36 is filled with sand 38 using a scoop or the like.

  Moreover, water is sprinkled on the spread sand 38 using watering. This is because the backfilled sand 38 is prevented from being compressed by filling water between the particles of the sand 38. A place where the sand 38 is not filled with the leg mold 36 becomes a placement place 38a.

  FIG. 37 is a diagram showing a second raw component placing step of the method for manufacturing a root-set block according to the present invention. In addition, the upper figure is the placement 27a, and the lower figure is the curing 27b. The second raw component placing process 27 is performed after the leg formwork installation process 26.

  The placing 27 a pours the ready-mixed concrete 39 into the placing places 38 a that become the four leg portions 31. The leg mold 36 is pulled out before flowing the ready-mixed concrete 39 or while compacting the concrete.

  The curing 27b protects the concrete until it hardens by spraying the curing sand 38b using the sieve 26c and filling the whole when the concrete is placed up to the legs 31. This is to block the outside air and prevent freezing in winter, and can be expected to keep warm.

  As described above, the method for producing a concrete secondary product according to the present invention generates a mold from sand, and therefore can easily produce a concrete secondary product having a complicated shape or pattern. In addition, it is possible to easily cope with slight design changes.

  Once the mold is formed with sand, the mold can be removed without waiting for the concrete to harden, so there is no need to prepare many molds. Moreover, since the restraint time of a formwork is short, it can manufacture as many as a day.

  The mold is used to form a mold with sand, and since the sand is only attached to the mold, it can be washed only with water. Moreover, it is not necessary to apply a release agent for preventing adhesion of concrete.

  If the air in the concrete does not escape, a flawed defect portion is generated on the surface. However, since the air escapes from the gap between the sand, the defect portion does not occur on the surface. Moreover, it becomes a warm appearance by the material of sand.

It is a figure which shows the example of an instrument used in the manufacturing method of the concrete pillar which is this invention. It is a front view of the punching die frame used in the manufacturing method of the concrete pillar which is the present invention. It is a figure which shows the process of winding an external sheet | seat on the punching die frame of the manufacturing method of the concrete pillar which is this invention. It is a figure which shows the process of mounting | wearing the sand mold with the punching mold of the manufacturing method of the concrete pillar which is this invention. It is a front view which shows the state which mounted | wore the sand mold with the punching mold in the manufacturing method of the concrete pillar which is this invention. It is a top view which shows the state which attached the punching mold to the sand mold in the manufacturing method of the concrete pillar which is this invention. It is a figure which shows the process of throwing sand into the sand mold of the manufacturing method of the concrete pillar which is this invention. It is a figure which shows the state into which sand was thrown into the sand mold in the manufacturing method of the concrete pillar which is this invention. It is a figure which shows the process of extracting a punching mold from the sand mold of the manufacturing method of the concrete pillar which is this invention. It is a figure which shows the state which extracted the punching mold from the sand mold in the manufacturing method of the concrete pillar which is this invention. It is a figure which shows the process of taking out an external sheet from the sand mold of the manufacturing method of the concrete pillar which is this invention. It is a figure which shows the state which took out the external sheet from the sand mold in the manufacturing method of the concrete pillar which is this invention. It is a figure which shows the process of pouring concrete into the sand mold of the manufacturing method of the concrete pillar which is this invention. It is a figure which shows the condition which compacts the poured concrete in the manufacturing method of the concrete pillar which is this invention. It is a figure which shows the process of demolishing the sand mold of the manufacturing method of the concrete pillar which is this invention. It is a figure which shows the concrete pillar completed with the manufacturing method of the concrete pillar which is this invention. It is a figure which shows the example of an instrument used in the manufacturing method of the root hardening block which is this invention. It is a figure which shows the process of embedding the protrusion part punching mold frame of the manufacturing method of the root hardening block which is this invention in sand. It is a figure which shows the state which embed | projected the projection part extraction formwork in the sand in the manufacturing method of the root-blocking block which is this invention. It is a figure which shows the process of installing the main body extraction | molding form of the manufacturing method of the root hardening block which is this invention. It is a figure which shows the process of drawing out the protrusion part extraction formwork of the manufacturing method of the rooting block which is this invention, and placing concrete. It is a figure which shows the process of placing concrete in the main body extraction formwork of the manufacturing method of the rooting block which is this invention. It is a figure which shows the state which extracted the main body punching mold in the manufacturing method of the root hardening block which is this invention. It is a figure which shows the process of installing the leg part extraction formwork of the manufacturing method of the root hardening block which is this invention. It is a figure which shows the process of placing concrete in the leg part extraction form of the manufacturing method of the root-blocking block which is this invention. It is a figure which shows the process of curing concrete of the manufacturing method of the root hardening block which is this invention. It is a figure which shows the root hardening block completed by the manufacturing method of the root hardening block which is this invention. It is a flowchart which shows the manufacturing process of the manufacturing method of the root hardening block which is this invention. It is a figure which shows the root hardening block manufactured with the manufacturing method of the root hardening block which is this invention. It is a figure which shows the cylindrical form frame used with the manufacturing method of the root hardening block which is this invention. It is a figure which shows the main body formwork used with the manufacturing method of the root hardening block which is this invention. It is a figure which shows the leg part formwork used with the manufacturing method of the root hardening block which is this invention. It is a figure which shows the protrusion part excavation process of the manufacturing method of the root hardening block which is this invention. It is a figure which shows the main body mold embedding process of the manufacturing method of the rooting block which is this invention. It is a figure which shows the 1st raw concrete placement process of the manufacturing method of the root hardening block which is this invention. It is a figure which shows the leg part frame installation process of the manufacturing method of the rooting block which is this invention. It is a figure which shows the 2nd raw concrete placement process of the manufacturing method of the root hardening block which is this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Manufacturing method of concrete pillar 1a Manufacturing method of root hardening block 1b Manufacturing method of root hardening block 2 Die-type frame 2a Inner pipe 2b Hole 3 External sheet 3a Silicon rubber 3b Pattern 4 Sand mold frame 4a Main body 4b Fixing screw 4c Partition plate 5 Scoop 6 sand 6a hole 7 lid 7a lid plate 7b hole 8 holding plate 9 concrete 10 compacting machine 11 concrete column 11a column 11b pattern 12 leg part punching frame 12a pressing plate 12b cylindrical body 12c support plate 12d hole 13 protruding portion punching frame 13a Tubular body 13b Tapered portion 13c Circumferential surface 14 Main body punching frame 15 Edge member 15a Edge plate 15b End portion 15c Holding portion 15d Grasping wood 15e Corner portion 16 Frame member 16a Frame plate 16b Curved portion 17 Sand 18 Concrete 18a Hole 19 Press Wood 20 Sieve 21 Root-set block 21a Part 21b Main body 21c Corner part 21d Leg part 22 Leveling process 23 Projection part excavation process 23a Excavation 23b Shaping 23c Shaping tool 24 Main body formwork embedding process 24a Formwork installation 24b Embedding 25 First raw component placing process 25a Projection part placing 25b Main body Placing 25c Concrete vibrator 26 Leg formwork installation process 26a Formwork installation 26b Embedding 26c Sieve 27 Second raw concrete placing process 27a Placing 27b Curing 28 Rooting block 29 Projection part 30 Main body 31 Leg part 32 Cylindrical formwork 32a type Frame 32b Through-hole 33 Protrusion protection plate 33a Protection plate 33b Hole 34 Body mold 34a Mold 34b Through-hole 34c Recess 34d Bending portion 35 Body protection plate 35a Protection plate 35b Hole 35c Recess 35d Bending portion 36 Leg mold 36a type Frame 36b Through hole 36c Grip portion 36d Lid 37 Leg protection plate 37a Protection plate 37b Hole 38 Sand 38a Placed place 38b Curing sand 39 Ready-mixed concrete

Claims (3)

  A step of winding an external sheet around the punching mold, a step of attaching the punching mold to the sand mold after the step, a step of throwing sand into the sand mold after the step, and extracting the punching mold from the sand mold after the step A concrete pillar with a pattern is manufactured by a step, a step of removing an external sheet from the sand mold after the step, a step of pouring concrete into the sand mold after the step, and a step of dismantling the sand mold after the step. A method for producing a concrete secondary product, characterized in that   A step of embedding the protruding portion mold in the sand, a step of installing the main body punching mold after the step, a step of drawing the protruding portion punching mold and placing concrete after the step, and a main body punching die after the step A step of placing concrete in the frame, a step of installing a leg-extracting mold after the step, a step of placing concrete in the leg-extracting mold after the step, and a step of curing the concrete after the step, A method for producing a concrete secondary product, characterized in that a complex-shaped solidified block can be produced. A leveling process for shaping sand flatly, a protrusion excavation process for excavating sand after the leveling process to install a cylindrical mold frame, and a main body mold for installing and embedding a main body mold after the protrusion excavation process A burying step, a first raw concrete placing step for pouring fresh concrete into the protrusion and the main body after the main body formwork is buried, and a leg type in which four leg molds are installed and buried after the first raw concrete placement step It consists of a frame installation process and a second raw concrete placing process in which raw concrete is poured into the four legs after the leg formwork installation process and is cured, and the complex shape of the projecting part, the main body and the leg part is consolidated. A method for producing a concrete secondary product, characterized in that a block can be produced.

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