JPH0798331B2 - Concrete spacer manufacturing method and manufacturing apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method and an apparatus for manufacturing a concrete spacer, and in particular, the assembly and disassembly of a frame can be significantly simplified.
In addition, the present invention relates to a method and an apparatus for manufacturing a concrete spacer, which can be performed in a short time and can improve the yield.

(B) Conventional Technology In recent years, as a spacer that supports reinforcing steel bars such as reinforced concrete floor slabs and ceiling slabs at a predetermined height on a dam plate that serves as a mold on the bottom surface of the slab before concrete placement,
So-called concrete spacers made of concrete are being put to practical use.

The size of the concrete spacer is smaller than that of a general concrete block, for example, 50 mm × 50 mm × 40 mm.
There are various types, such as so-called sheep-shaped, heart-shaped, chevron-shaped, and dice-shaped ones. There is one.

It can be said that this concrete spacer is a concrete block in the sense of a lump made of concrete,
In concrete blocks, concrete or mortar with a small amount of water that can be made into dumplings by hand is used as the raw material, whereas concrete spacers are used to obtain homogeneity with the concrete cast on the slab. Commercially available sludge-like raw concrete milk is used as a raw material.

In other words, the concrete spacer is manufactured by filling the formwork with fresh concrete milk transported from the concrete plant at the construction site for the purpose of reducing the transportation cost because it is heavy unlike the spacer made of metal.

The following methods have been proposed as a method for manufacturing this concrete spacer.

Each time, assembling the frame, filling this frame with the concrete compounding material, applying vibration to this to homogenize, then, after drying this, disassemble the frame into pieces and demold, Method of forming a concrete spacer.

Fill the rectangular box in plan view with the concrete mixture material,
Vibration is applied to this to homogenize it, then it is dried to a dry state, then demolded to form a rectangular raw concrete block, and this rectangular raw concrete block is cut with a cutter to form a sheep can A method of forming raw concrete spacers such as dice shapes and finally drying them.

An egg pack-shaped molding frame made of synthetic resin is filled with a concrete compounding material, dried to a dry state, and then inverted and demolded, whereby an inverted truncated cone shape or an inverted truncated pyramid shape is formed. A method of forming a green concrete spacer and then drying it.

As a method for manufacturing a general concrete block, for example, as disclosed in Japanese Utility Model Publication No. 62-144610, a molding frame body having a plurality of inner partitions fixed inside is fixed to a base plate with bolts and nuts. And assemble the formwork,
A method is known in which the mold is filled with a concrete compounding material, and when the outer surface of the concrete compounding material is slightly hardened (in some cases, it may be before hardening), the mold is removed.

However, since this method is a method for forming a canned concrete block, it is considered that there is room for studying whether it can be applied to a concrete spacer.

(C) Problems to be Solved by the Invention As described above, the size of the concrete spacer is
Smaller than general concrete blocks, 50 mm ×
Because there are some 50mm x 40mm or less,
Die cutting is extremely difficult.

That is, in the above method, much time and labor are required for assembling and disassembling the frame body, and at the time of disassembling the formwork, the concrete spacers are liable to be chipped or cracked, resulting in poor yield and high production cost. There is.

According to the method described above, since the mixed material is removed from the mold in a dry state, it is difficult to separate the mixed material from the inner surface of the box body, and when the mold is removed, cracks or cracks in the fresh concrete block are likely to occur, and further, the fresh concrete block is cut with a cutter. Since chips and cracks are likely to occur at times, there is a problem that the yield is low and the production cost is high.

Further, this method has a problem that it requires a skill to cut the fresh concrete block into fresh concrete spacers having a constant size and shape.

In the above method, since the molding concrete frame is inverted and the raw concrete spacer is dropped at the time of demolding, the raw concrete spacer is deformed, chipping or cracking may occur, resulting in poor yield and high production cost. There's a problem.

Further, in this method, since the molding frame is made of synthetic resin, it is fragile, the number of times of repeated use is less than about 5 times, and the frequency of replacement of the molding frame is high.
It is necessary to prepare a large amount of molding frame, and there is a problem such as great dissatisfaction in reducing the production cost.

Therefore, the above method proposed for the purpose of manufacturing a large number of concrete blocks at one time, reducing the time and effort for assembling and disassembling the formwork, and improving the productivity is applied to the manufacturing of concrete spacers. I tried to do this, but this method is such that the outer surface of the concrete mixed material has hardened to some extent, or it is released from the mold in an uncured state, so the amount of water mixed is such that dumplings can be made by hand gripping. It can be applied to the general method for manufacturing concrete blocks using a small amount of concrete or mortar, but it is used for the production of commercially available sludge-like raw concrete containing a large amount of water or concrete spacers made from concrete milk. At the same time, there was a fatal defect that it could not be applied because the shape collapsed.

Furthermore, in this method, it was attempted to remove from the mold after the concrete-blending material became in a dry state, but this molding frame was fixed to the base plate with bolts and nuts, or prior to this fixing. Since it is necessary to reversely rotate the long screw, it takes a lot of time and labor to fix the molding frame, which is disadvantageous in reducing the production cost.

Further, even at the time of demolding, after unscrewing the bolts and nuts, it is necessary to gradually rotate the long screws in order not to tilt the molding frame. It takes much more labor and time than the method of using individual molds, which is a significant disadvantage in reducing the production cost.

In particular, in reality, it takes a lot of time and effort, and
As a result of the molding frame tilting at the time of demolding and the green concrete spacers being distorted or hanging or cracking, the yield is poor and there is a problem of feeling great dissatisfaction in reducing production costs.

In addition, the molding frame used for the method is a special molding frame in which both sides of the partition are tapered and tapered, the outer edge is provided at the upper edge, and long screws are screwed into the four corners of the outer collar. Therefore, the molding frame itself becomes expensive, and highly corrosive alkaline water adheres to the long screw and the screw hole into which it is inserted, and the long screw and this can be screwed in during repeated use. There is also a problem that the frequency of replacement of the molding frame increases, which is further disadvantageous in terms of reducing the production cost, because the screw hole to be corroded becomes unusable.

The present invention has been completed to solve the above technical problems all at once, and it is possible to remarkably easily assemble and disassemble a formwork in a short time, and to significantly improve the yield. An object of the present invention is to provide a method and an apparatus for manufacturing a concrete spacer that is made possible.

(D) Means for Solving Problems In the method for producing a concrete spacer according to the present invention (hereinafter referred to as the present invention method), cement, sand, gravel, water and the like are mixed in order to achieve the above object. And (A) to form a compounded material, and a step (B) of filling the compounded material obtained in the above step (A) into a molding frame that is positioned and placed on a pallet by a plurality of columns. Process (B)
(C) in which the mixed material filled in the molding frame is aged to drain water, and after the water is drained in the step (C), the molding frame is pulled out upward to form a green concrete spacer (D) A step of stacking a plurality of pallets on which the green concrete spacers obtained in the step (D) are placed so as to be separated from each other by a column above the height of the molding frame, and then rapidly drying and solidifying with steam (E ), Is a method characterized by comprising.

Further, a concrete spacer manufacturing apparatus according to the present invention (hereinafter, referred to as an apparatus of the present invention) includes a pallet of a predetermined shape and a pallet placed on the pallet in order to carry out the method of the present invention. A molding frame body having a vertical standing partition plate and forming mold holes of a plurality of green concrete spacers whose upper and lower sides are open, and a pallet which is erected higher than the molding frame body and placed on the pallet. A concrete forming device having at least three columns for positioning a molding frame, a concrete charging device for charging a compounding material in which cement, sand, gravel and water are mixed into the concrete molding device, and a concrete molding device. After filling the compounded material, aging and draining, the molding frame is pulled out upward, and then the columns are separated from each other by the pillars and stacked vertically. Rapid drying by supplying steam to the raw concrete spacer placed on the plurality of pallets, steam supply device to solidify, characterized in that it comprises a.

Hereinafter, the method of the present invention and the apparatus of the present invention will be described in detail.

In the method of the present invention, first, the step (A) of mixing cement, sand, gravel and water to form a compounded material is carried out.

In this step (A), the mixing ratio of these cement, sand, gravel, and water may be in accordance with the mixing ratio at the time of producing a conventional concrete spacer. Specifically, for example, in a concrete plant, so-called green concrete is used. It suffices to follow the mixing ratio at the time of manufacturing, for example, to form this mixing material in a concrete plant in advance and carry it into a construction site with a concrete mixer truck.

In the method of the present invention, next, a step of filling the compounding material obtained in the step (A) into a molding frame body which is positioned and placed on a pallet by a plurality of columns and gives vibrations as necessary (B) is carried out.

In order to carry out the method of this step (B), the apparatus of the present invention comprises a concrete molding apparatus having a pallet, a molding frame and columns, and a compounding material obtained by mixing the concrete molding apparatus with cement, sand, gravel and water. And a concrete input device for inputting.

The pallet of the concrete molding apparatus may be a plate-shaped one on which a molding frame can be placed and supported, and its material is corrosion resistance (alkali resistance) to a highly corrosive aqueous solution contained in fresh concrete. Are preferable, and examples thereof include metals such as iron and nickel, synthetic resins, and tempered glass.

The molding frame may be one in which a vertical partition plate is provided in the peripheral frame to form mold holes of a plurality of green concrete spacers whose upper and lower sides are open, and the planar shape of the mold holes is not particularly limited. Alternatively, for example, a partition plate may be provided in a lattice shape to form a planar shape such as a square or a rectangle.

As the material of this molding frame, like the pallet,
Metals such as iron and nickel, synthetic resins, tempered glass, and the like can be used, but they are not necessarily made of the same material as the pallet.

The pillar is erected on the pallet higher than the molding frame, and is arranged so as to position the molding frame placed on the pallet. Further, the number of columns is three or more in order to stably support the pallets stacked on the upper side in the step (E) described later.

The concrete feeding device is not particularly limited as long as it is configured to be able to feed the compounding material into each mold hole of the molding frame positioned and placed on the pallet by a plurality of columns, for example, concrete. A funnel-shaped hopper that stores ready-mixed concrete supplied from a mixer truck,
An example is one that includes a take-out section having a cylinder continuously provided under the hopper and a shutter that opens and closes the cylinder, and an operation unit that operates the shutter of the take-out section.

In this step (B), the compounding material is filled in the molding frame and vibration is applied as necessary. This vibration is to homogenize the compounding material filled in the molding frame. Therefore, here, the vibration is applied while the compounding material is being packed in the molding frame, and the case where the compounding material is packed in the molding frame. After that, the case of applying vibration and the case of applying vibration while filling the molding frame with the compounding material and further applying vibration after continuously charging the compounding material into the molding frame are included.

In this step (B), the ready-mixed concrete with which the molding frame is filled is vibrated and then, if necessary, scraped off on the upper surface of the molding frame.

In the present invention, the step (C) of aging the compounded material filled in the molding frame in the step (B) to drain water is further performed.

In this step (C), aging refers to leaving the molded frame body until it has a shape-retaining property such that the green concrete spacer does not collapse when the molded frame body is pulled out upward after draining. Sufficiently, it will be left for several hours in winter. However, even in winter
This aging time can be shortened to about 1 hour by heating the compounded water to hot water. Also,
If this aging time is too long, the compounded material solidifies and adheres to the molding frame, making it impossible to demold the molding frame.

In this step (C), drainage means that excess water in the blended material has exuded due to aging. The moisture exuded by this water removal is between the green concrete spacer and the molding frame. Due to the presence of the partition plate, even though the mold surface formed by the partition plate is vertical, in the next step (D), the mold frame can be removed by simply lifting the molding frame upward without breaking the mold concrete spacer. You can do it.

In other words, by utilizing the slip due to the water that has exuded by the water draining in this way, it is not necessary to form the inner partition into a taper shape with a thin taper. You can make a molding frame by fixing it,
The material cost and processing cost of the molding frame can be reduced.

In the present invention, subsequently, in the step (C), a step (D) of forming a green concrete spacer by draining the molding frame body after draining is performed.

In this step (D), as described above, the water exuded by the drainage is present between the green concrete spacer and the molding frame, so that the slip between the green concrete spacer and the molding frame is improved. So, without any special skill or skill, you can simply pull up the formwork upwards, pull out the forming frame in a short time, and leave the fresh concrete blocks neatly arranged on the pallet under their own weight. Can be done.

Further, in this step (D), the pillars for positioning the molding frame have a height enough to separate the pallet from the height of the molding frame, as will be described later. The removal of the molding frame will be guided until the frame is completely extracted. This prevents the molding frame from tilting during extraction, and combined with this and the ease of extraction of the molding frame due to water oozing out by draining, the inclination of this molding frame allows the green concrete spacers to be removed. Deformation, chipping, and cracking are prevented, and the yield can be significantly increased.

Here, in the present invention, a mold release agent such as oil may be attached in advance to the mold surface of the molding frame in order to make it easier to extract the molding frame. As a method of attaching the release agent to the molding frame, there are coating, spraying, dipping and the like.

In the present invention, finally, after stacking a plurality of pallets on which the fresh concrete spacers obtained in the above step (D) are placed so as to be separated from each other by a column higher than the height of the molding frame, the pallets are rapidly heated by steam. The step (E) of drying and solidifying is carried out.

In this step (E), by pulling out the molding frame, the pallet with the ready-mixed concrete spacers placed on the pallet in an orderly manner by its own weight is moved up and down so that the upper pallet can be received by the pallet of the lower pallet. Stacked. Here, since the columns are higher than the molding frame, there is a space between the green concrete blocks placed on each pallet and the pallets above it.

By pulling out the molding frame, the front, back, left, right, and four sides of each fresh concrete block and the upper surface are open. Therefore, when steam is supplied to the fresh concrete block placed on each pallet, the steam will be changed to the fresh concrete block. It comes into contact with the 5 surfaces of the above and efficiently and rapidly solidifies the green concrete block and solidifies it.

In order to carry out the method of this step (E), the device of the present invention is
A steam supply device is provided for supplying steam to the green concrete spacers placed on a plurality of pallets vertically stacked and separated from each other by the columns to rapidly dry and solidify.

In carrying out the method of the present invention, it is possible to attach a release agent such as oil to the molding frame, and in this case, it is easier to pull out the molding frame upward in the step (D). become.

Examples of the method of attaching the release agent to the molding frame include various methods such as coating the release agent on the molding frame, spraying the release agent onto the molding frame, and immersing the molding frame in the release agent. To be

Further, in the device of the present invention, in order to facilitate the carrying of the molding frame, the placement on the pallet and the die-cutting, the molding frame can be provided with a grip portion, and further, the pallets can be carried, stacked and unloaded. A grip may be provided on the pallet to facilitate the operation.

(E) Action According to the method of the present invention, the mold frame, that is, the concrete molding device is assembled by simply positioning and placing the molding frame on the pallet by the columns, and the molding frame is palletized by the bolts, nuts and the like. Compared with the case of fixing, the mold can be assembled in a remarkably simple manner and in a short time.

Also, by aging and draining water, moisture can be made to seep between the molding frame and the green concrete spacers, and this moisture improves the slippage between the molding frame and the green concrete spacers. Without requiring special skill or skill, the mold frame can be removed by simply pulling up the mold frame upwards, and the concrete blocks can be left on the pallet by their own weight while being neatly arranged.

In other words, compared to fixing the molding frame to the pallet with bolts, nuts, etc., the molding frame can be disassembled from the pallet extremely easily and in a short time, and the molding frame can be fixed with four long screws. Compared with pushing up from a pallet, the molding frame can be demolded in a significantly easier time.

Furthermore, after pulling out the molding frame, stack the pallets with the green concrete spacers on top and bottom and supply steam to rapidly dry and solidify, so it is possible to dry and solidify a large amount of green concrete spacers at once in a short time. You can

Moreover, after removing the molding frame, the upper and lower pallets are separated by columns to be higher than the height of the molding frame to supply the steam, so that the supplied steam is uniformly distributed on the five surfaces except the bottom surface of the green concrete spacer. , Or contact them almost uniformly,
It can be dried and solidified more efficiently in a short time.

According to the device of the present invention, since the molding frame body is provided with a partition plate which is vertically erected in the peripheral frame to form the mold holes of a plurality of green concrete spacers which are opened at the top and bottom, the mold frame, that is, The concrete forming apparatus has a simple structure and can be easily and inexpensively implemented.

In addition, the pillar of the concrete molding device has three functions of positioning the molding frame, guiding when the molding frame is pulled out, and maintaining the interval when stacking the pallets. As compared with the case where the guide means at the time of die cutting of the molding frame and the interval holding at the time of stacking the pallets are provided, the configuration of the concrete molding device is further simplified,
It is possible to reduce the number of parts and reduce costs.

Furthermore, according to the device of the present invention, after the molding frame is placed by positioning with the columns on the pallet of the concrete molding device,
A concrete forming device can be filled with a compounding material formed by mixing cement, sand, gravel, and water with a concrete input device.

That is, assembling of the concrete forming device is completed simply by positioning and placing the forming frame on the pallet on the pallet, which is significantly easier than fixing the forming frame to the pallet with bolts and nuts. In addition, the mold can be assembled in a short time.

Water can be exuded between the green concrete spacer and the molding frame by aging and draining after filling the concrete molding device with the mixing material with the concrete feeding device.

The water that oozes out between the raw concrete spacer and the molding frame improves the sliding between the raw concrete spacer and the molding frame, and simply pulls up the mold without requiring special skill or skill. Just die-cut the molding frame,
The raw concrete blocks can be left on the pallet by their own weight while being lined up in an orderly manner.

In other words, compared to fixing the molding frame to the pallet with bolts, nuts, etc., the molding frame can be disassembled from the pallet extremely easily and in a short time, and the molding frame can be fixed with four long screws. Compared with pushing up from a pallet, the molding frame can be demolded in a significantly easier time.

In addition, since the pillar for positioning the molding frame is higher than the molding frame, this pillar guides the withdrawal of the molding frame, and the molding frame is prevented from tilting during the withdrawal. It is possible to prevent deformation, chipping, cracking, etc. of the green concrete block due to the inclination of the molding frame at the time of demolding, and it is possible to dramatically improve the yield.

After pulling out the molding frame, the pallets on which the fresh concrete block is placed are stacked by the above-mentioned pillars so as to be separated from each other at a height higher than the height of the molding frame, and a large amount of fresh concrete is supplied by supplying steam with a steam supply device. The block can be rapidly dried and solidified with steam all at once. In addition, since the columns are higher than the molding frame, the supplied steam can be contacted with 5 surfaces other than the bottom surface of the green concrete spacer to further improve the efficiency. Good and can be dried and solidified in a short time.

(F) Examples Hereinafter, examples of the present invention will be described in detail with reference to the drawings, but the present invention is not limited thereto.

First, a manufacturing apparatus preferably used for the method for manufacturing a concrete spacer of the present invention will be described in detail.

Referring to FIG. 1, a concrete spacer manufacturing apparatus 1 according to an embodiment of the present invention includes a concrete charging apparatus 2, a concrete molding apparatus capable of molding a plurality of green concrete spacers, and a steam supply apparatus for rapidly drying the green concrete spacers. (Not shown), and the concrete forming apparatus 3 is placed on a base.

The concrete injection device 2 is not particularly limited as long as it is configured to store fresh concrete and to take out the concrete as needed. Here, for example, the fresh concrete transported by a concrete mixer truck is received. A hopper 2a for storing and a take-out section 2b having a shutter for opening and closing an internal fresh concrete take-out path, which is continuously provided below the funnel-shaped lower part of the hopper 2a, and a shutter for this take-out section 2b. It has a lever 2c for opening and closing.

As shown in FIGS. 1 and 2, the concrete molding apparatus 3 includes a plate-shaped pallet 4 having a rectangular shape in plan view, a molding frame 5 placed on the pallet 4, and a molding frame on the upper surface of the pallet 4. It is composed of four pillars 6 which are erected higher than the body 5 and position the molding frame body 5 placed on the pallet 4 at a predetermined position.

The molding frame body 5 is a lattice member 5b that partitions the interior of the peripheral frame 5a into a lattice shape by combining the peripheral frame 5a and a vertically standing plate member.
Further, a pair of handle-like gripping portions are provided on the outer peripheral surface of the peripheral frame 5 for facilitating carrying of the molding frame body 5, mounting on the pallet 4, and demolding.

The material of the pallet 4 and the molding frame 5 is not particularly limited, and examples thereof include metals such as iron and nickel, synthetic resins, tempered glass, and the like. It is preferable to use a material that is not corroded as much as possible with respect to water. However, it is not essential to the present invention that the pallet 4 and the molding frame 5 are made of the same material.

By the way, in one embodiment of the method of the present invention, so-called ready-mixed concrete or concrete milk is formed in the step (A) of previously mixing cement, sand, gravel, water and the like to form a mixed material. This step (A) may be carried out at a construction site, but in order to reduce the installation area of equipment at the construction site, entrust this step (A) to a ready-mixed concrete manufacturer commonly called a ready-mixed concrete supplier. Is wise, for example, fresh concrete formed by a ready-mixed concrete supplier is transported by a concrete mixer truck and received and stored in the hopper 2a of the concrete feeding device 2.

Next, after setting the concrete molding device 3 on the pallet 4, the lever 2c of the concrete feeding device 2 arranged above these is operated to load the green concrete on the molding frame 5 as shown in FIG. The step (B) of dropping and homogenizing the inner concrete dropped in the molding frame 5 by vibrating the base is carried out as necessary.

For example, as shown in FIG. 1, the set of the concrete molding apparatus 3 is such that the pallet 4 is placed at a predetermined position on the base, and then the molding frame 5 is positioned on the pallet 4 by the columns 6. The procedure is carried out such that the pallet 4 is placed or the pallet 4 which is placed by previously positioning the molding frame 5 with the columns 6 is placed at a predetermined position on the base.

That is, the work of assembling the pallet 4 and the molding frame 5 is simply performed by positioning the molding frame 5 with the support columns 6 and placing it on the pallet 4, and using the bolts and nuts, the pallet 4 and the molding frame 5 are assembled. Compared with the case where 5 is fixed, the work of aligning the bolt insertion hole, inserting the bolt, screwing the nut and tightening the screw can be omitted, so that the molding frame 5 can be remarkably easily and quickly placed on the pallet 4. The pallet 4 and the molding frame 5 can be positioned and assembled, and the manufacturing time can be significantly shortened.

In one embodiment of the method of the present invention, ready-mixed concrete is dropped on the forming frame 5 and, if necessary, as shown in FIG. A step (C) of carrying out draining to separate excess water from fresh concrete is carried out by leaving it for a while and aging, and then, as shown in FIG. Concrete spacer 7a
The step (D) of forming is performed.

Without sufficient aging, if the molding frame 5 is pulled out in a state where the surface of the fresh concrete is simply hardened or in an uncured state, the raw concrete spacer 7a loses its shape, which is not preferable or excessive. When the fresh concrete is aged and dried, it is not preferable because the fresh concrete spacer 7a adheres to the molding frame 5 and it becomes difficult to remove the mold.

When the water is drained with appropriate aging, the water separated from the fresh concrete by the water drainage is interposed between the green concrete spacer 7a and the molding frame 5, and slippage between the green concrete and the molding frame 5 occurs. To improve the grid member
Although the mold surface of 5a is vertical, as shown in FIG.
It is possible to pull out the molding frame 5 upward without leaving cracks and to leave the fresh concrete spacers 7a in orderly arranged on the pallet 4 by its own weight.

In disassembling the molding frame 5 and the pallet 4 in this way, it is sufficient to simply pull out the molding frame 5 upward without screwing the bolts and nuts. The mold frame 5 can be easily and quickly disassembled and the molding frame 5 can be demolded.

Further, as compared with the method of gradually lifting the molding frame 5 from the pallet with long screws screwed in the four corners in the longitudinal direction, the molding frame 5 can be removed from the pallet 4 of the molding frame 5 in a much shorter time. It can be disassembled and die-cut.

In addition, since the pillar 6 is formed higher than the molding frame body 5, when the molding frame body 5 is pulled out upward,
By performing the role of guiding the molding frame 5, it is possible to effectively prevent the green concrete spacer 7a from being deformed, chipped, or cracked due to the tilting of the molding frame 5, and the yield can be dramatically increased. .

In this embodiment, in order to make it easier to remove the molding frame 5, a release agent such as oil is attached to the inner surface of the molding frame 5 before placing the molding frame 5 on the pallet 4. I am letting you. The method for attaching the release agent to the inner surface of the molding frame 5 is not particularly limited, and for example, a method such as coating, spraying or dipping can be adopted.

In the method of the present invention, next, the plurality of pallets 4 on which the green concrete spacers 7a obtained in the step (D) are placed are stacked by the pillars 6 so as to be separated from each other at a height higher than the height of the molding frame 5. After that, a step (E) of rapidly drying and solidifying with steam is performed.

A method of stacking a plurality of pallets on which a plurality of green concrete spacers 7a are placed while being separated from each other by a height higher than the height of the molding frame is not particularly limited, and, for example,
After forming the plurality of green concrete spacers 7a on the plurality of pallets 4 as described above, for example, as shown in FIG.
It is possible to adopt a method of stacking the pallets 4 on which the 7a are placed on the base in any order.

However, after forming a plurality of green concrete spacers 7a having a predetermined size and shape as described above on the pallet 4 of the first stage, the pallet 4 of the next stage is formed.
And the molding frame 5 are placed on the columns 6 of the first-stage pallet 4, and are stacked higher than the height of the molding frame 5 with each other. The green concrete spacer 7a is formed, and such a procedure is repeated one after another, for example, as shown in FIG. 5 (b),
By adopting a method of stacking a plurality of pallets 4 on which a plurality of green concrete spacers 7a are placed so as to be separated from each other at a height higher than the height of the molding frame 5, the work area flat area can be reduced.

The pallet 4 is provided with a pair of grips 8 in order to facilitate the carrying and unloading of the pallet 4.

Next, a plurality of pallets on which the green concrete spacers 7a obtained in the above step (D) are placed are stacked by the pillars so as to be separated from each other at a height higher than the height of the molding frame, and then rapidly dried and solidified by steam. Step (E) is carried out.

That is, in this step (E), after stacking the plurality of pallets 4 on which the plurality of green concrete spacers 7a are placed in this manner with the pillars 6 separated from each other at a height higher than the height of the molding frame, Steam is supplied to the green concrete spacers 7a on each pallet 4 by using the steam supply device, and is rapidly dried and solidified to obtain the concrete spacers 7.

In this case, the green concrete spacer 7a can be removed by removing the molding frame 5.
5 surfaces of the green concrete spacer 7a other than the lower surface of the green concrete spacer 7a can be brought into contact with steam by stacking the pallets 4 apart from each other at a height higher than the height of the molding frame 5. Therefore, as compared with the case where steam is supplied without removing the molding frame 5, the green concrete spacer 7a is further rapidly dried and solidified to obtain the concrete spacer 7.

The steam supply device used in this step (E) is a known device configured to supply steam to a plurality of green concrete spacers 7a placed on a plurality of pallets 4 stacked in a plurality of stages as described above. The temperature, vapor pressure, etc. of the supplied steam can be controlled easily and accurately by a known method, and the quality of the concrete spacer 7 as a product can be controlled by controlling the vapor temperature and vapor pressure. The management becomes easy and the uniformity can be improved.

In the above embodiment, the molding frame 5 includes the peripheral frame 5a and the lattice member 5b.
Since, as shown in FIG. 5 (b), a dice-shaped green concrete spacer 7 is formed. For example, as shown in FIG. 6 (a), a continuous grid is provided in the peripheral frame 5a. In the case of providing the lattice member in a shape, a canister-shaped concrete spacer 7 as shown in FIG. 6 (b) is formed, or a heart-shaped mold cavity is formed as shown in FIG. 7 (a), for example. When the special grid member 5b to be formed is provided in the peripheral frame 5a,
It is also possible to form a heart-shaped concrete spacer 7 as shown in FIG. 7 (b).

(G) Effect of the Invention As described above, according to the method of the present invention, the mold, that is, the concrete molding apparatus is assembled by simply positioning the molding frame on the pallet with the support pillars and mounting the molding frame. Compared with the case where the molding frame is fixed to the pallet with nuts or the like, it is possible to assemble the mold remarkably easily and in a short time.

Also, compared with the case where the long screws on the vertical axis are screwed into the four corners of the molding frame, the long screws are rotated backward before placing the molding frame on the pallet, and The work of arranging it higher is not required, and the mold can be assembled in a significantly shorter time in a much easier manner.

Furthermore, according to the method of the present invention, by aging and draining water, water can be ooze out between the molding frame and the green concrete spacer, and the water can be used between the molding frame and the green concrete spacer. Even if the molding surface of the molding frame is vertical, the molding frame can be demolded by simply pulling the molding frame upward without requiring special skill or skill, and the concrete block Can be left on the pallet by their own weight while being neatly arranged.

In other words, in forming the lattice member and the peripheral frame of the molding frame when molding a can-shaped or dice-shaped concrete spacer, by cutting the flat plate material to an appropriate length and fixing it by welding or the like, The material cost and processing cost of the molding frame can be significantly reduced.

In addition, the removal of the molding frame is much easier and the molding frame can be disassembled from the pallet in a shorter time than when the molding frame is fixed to the pallet with bolts, nuts, etc. Compared with the case where the molding frame is pushed up from the pallet with long screws, the molding frame can be demolded much more easily and in a shorter time.

Moreover, when pulling out the molding frame, the molding frame is pulled out by using the pillars that guide the pallets that are stacked above and below the height of the molding frame as a guide, so that the molding frame tilts and the green concrete spacers are removed. As a result of being effectively prevented from being deformed, chipped or cracked, the yield can be dramatically increased.

Furthermore, after pulling out the molding frame, stack the pallets with the green concrete spacers on top and bottom and supply steam to rapidly dry and solidify, so it is possible to dry and solidify a large amount of green concrete spacers at once in a short time. You can

Moreover, after removing the molding frame, the upper and lower pallets are separated by columns to be higher than the height of the molding frame to supply the steam, so that the supplied steam is contacted with the five surfaces except the bottom surface of the green concrete spacer. Therefore, it is possible to dry and solidify more efficiently in a short time.

Then, shortening of the above-mentioned mold assembly time, shortening of the molding frame withdrawing time by setting the timing of withdrawing the molding frame after draining, and rapid drying by steam, shortening of the drying time by adoption of solidification are remarkably combined. The manufacturing time can be shortened.

Further, according to the device of the present invention, since the molding frame is provided with a partition plate which is vertically erected in the peripheral frame to form the mold holes of the plurality of green concrete spacers which are opened at the top and bottom, That is, the structure of the concrete molding device is simple,
It can be implemented easily and inexpensively.

In particular, in the case of a molding frame for molding a concrete spacer such as a sheep-shaped or dice-shaped one, slippage between the molding frame and the green concrete spacer is caused by the water leached on the surface of the raw concrete spacer by draining. Since it will be improved, the material cost and processing of the molding frame will be performed by cutting the strip plate member to an appropriate length and fixing it by welding etc. when forming the peripheral frame and the lattice member that constitute the molding frame. The cost can be significantly reduced and the molding frame can be easily formed.

Further, the pillar of the concrete molding device has three functions of positioning the molding frame, guiding the molding frame from the die, and maintaining the interval when the pallets are stacked, and is placed on the pallet. Positioning means for positioning the molding frame,
Guide means for guiding the molding frame when the molding frame is demolded,
Compared with the case of providing a space holding means for holding the space between the pallets at the time of stacking the pallets, the structure of the concrete forming apparatus becomes simpler, the number of parts can be reduced, and the cost can be reduced.

Further, by the apparatus of the present invention, after positioning the molding frame body by positioning it with the columns on the pallet of the concrete molding apparatus, the mixed material formed by mixing cement, sand, gravel and water is mixed with this concrete by the concrete feeding apparatus. Can be filled into molding equipment.

That is, assembling the concrete molding device is completed simply by positioning and placing the molding frame on the pallet with the columns,
Compared with the case where the molding frame is fixed to the pallet with bolts, nuts, etc., it is possible to assemble the mold remarkably easily and in a short time.

Water can be exuded between the green concrete spacer and the molding frame by aging and draining after filling the concrete molding device with the mixing material with the concrete feeding device.

The water that oozes out between the raw concrete spacer and the molding frame improves the slippage between the raw concrete spacer and the molding frame, and does not require any special skill or skill. You can remove the molding frame by simply pulling it up to leave the concrete blocks on the pallet in an orderly manner by their own weight.

In other words, compared to fixing the molding frame to the pallet with bolts, nuts, etc., the molding frame can be disassembled from the pallet extremely easily and in a short time, and the molding frame can be fixed with four long screws. Compared with the case of pushing up from the pallet, the molding frame can be removed from the mold in a significantly easier manner and in a shorter time.

In addition, since the pillar for positioning the molding frame is made higher than the molding frame, the pillar guides the withdrawal of the molding frame, and the molding frame is prevented from tilting at the time of withdrawal, Deformation, chipping, and cracking of the green concrete block due to the inclination of the molding frame during demolding are less likely to occur.

After pulling out the molding frame, the pallets on which the fresh concrete block is placed are stacked by the above-mentioned pillars so as to be separated from each other at a height higher than the height of the molding frame, and a large amount of fresh concrete is supplied by supplying steam with a steam supply device. The block can be rapidly dried and solidified with water vapor to obtain a concrete spacer. Moreover, since the columns are higher than the molding frame, the supplied water vapor can be removed from the raw concrete spacer exposed by removing the molding frame. By contacting all five surfaces except the lower surface, it is possible to dry and solidify more efficiently in a short time.

Then, by using the device of the present invention, by carrying out the method of the present invention, shortening the above-mentioned mold assembly time, shortening the molding frame withdrawing time by setting the drawing timing of the molding frame after draining, and steam. The rapid drying due to the above and the shortening of the drying time due to the adoption of the solidification can significantly reduce the manufacturing time.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the device of the present invention, FIG. 2 is a perspective view of the concrete forming device, and FIGS.
FIG. 5A is a cross-sectional view showing the usage thereof, FIG. 5B is a perspective view of a concrete spacer formed by the concrete molding apparatus shown in FIG. 2, and FIG.
Is a perspective view showing another example of the molding frame, and FIG.
FIG. 7A is a perspective view of a concrete spacer formed by the molding frame body shown in FIG. 7A, FIG. 7A is a perspective view showing another example of the molding frame body, and FIG. It is a perspective view of the concrete spacer formed of the molding frame shown in a). 1 ... Concrete spacer manufacturing equipment, 2 ... Concrete feeding equipment, 3 ... Concrete molding equipment, 4 ...
... Pallet, 5 ... Molding frame, 6 ... Post, 7 ... Concrete spacer, 7a ... Green concrete spacer, 8 ... Gripping part.

Claims (6)

[Claims] 1. A step (A) of mixing cement, sand, gravel, water and the like to form a blended material, and positioning the blended material obtained in the above step (A) on a pallet by a plurality of columns. A step (B) of filling the placed molding frame, a step (C) of aging the compounded material filled in the molding frame in the step (B) to drain water, and a step of draining water in the step (C) , A step (D) of forming a green concrete spacer by pulling out the green frame upward, and a plurality of pallets on which the green concrete spacer obtained in the above step (D) is placed are separated from the height of the green frame by the pillars. A method for producing a concrete spacer, which comprises a step (E) of rapidly drying and solidifying with water vapor after stacking them at a high distance. 2. The method for producing a concrete spacer according to claim 1, wherein a peeling agent is attached to the molding frame. 3. A molding frame in which a pallet having a predetermined shape and a partition plate placed on the pallet and standing upright in a peripheral frame are provided to form mold holes of a plurality of green concrete spacers opened at the top and bottom. A concrete molding apparatus having a body and at least three columns that are erected higher than the molding frame on the pallet and position the molding frame placed on the pallet; cement, sand , Concrete injection device for injecting mixed material in which gravel and water are mixed, and concrete molding device are filled with the mixture material, aged and drained, and then the molding frame is extracted upward, and then the above-mentioned pillar To supply steam to the green concrete spacers placed on multiple pallets that are separated from each other and stacked on top of each other. Apparatus, the manufacturing apparatus of the concrete spacer, characterized in that it comprises a. 4. The concrete spacer manufacturing apparatus according to claim 3, wherein a release agent is attached to the molding frame. 5. The concrete spacer manufacturing apparatus according to claim 3, wherein the pallet is provided with a grip portion. 6. The concrete spacer manufacturing apparatus according to claim 3, wherein the molding frame is provided with a grip portion.