JPH07290431A - Forming method of concrete block - Google Patents

Abstract

PURPOSE:To form a concrete block in a desired position, an internally threaded member and other fittings of which are provided, without making and closing mounting holes on the casting surface of a concrete form. CONSTITUTION:A permanent magnet 16 is attractively fixed to the casting surface 14 of a concrete form 12. At the same time, an internally threaded member 18 is fixingly held on the casting surface 14 by utilizing a magnetic force of the permanent magnet 16. Under the condition just mentioned above, concrete 20 is cast in the form 12. When the form 12 is opened after the curing of the concrete 20, the permanent magnet 16 remains on the casting face 14 side, while the internally threaded member 18 separates from the permanent magnet 16, resulting in allowing to obtain a concrete panel equipped with the internally threaded member 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a concrete block having a female screw member and other metal fittings, or having a through hole or a recess.

[0002]

2. Description of the Related Art Conventionally, as a method for forming a concrete block provided with a female screw member such as a nut, as shown in FIG. 12, for example, as shown in FIG. Mounting hole at position 6
In the state where the male screw member 7 such as a bolt is inserted from the outside of the mounting hole 6 and the female screw member 8 is attached and fixed from the inside of the mold frame 5 to the tip end side of the male screw member 7, A general method is to form concrete by pouring and curing the concrete, and when the concrete is hardened, the male screw member 7 is removed and the mold 5 is opened.

By the way, when changing the size, dimensions, etc. of the concrete block 9 to be formed, it is desirable to manufacture a new form 5 and form the concrete block 9 in the above-described manner, but the manufacturing cost is high. In some cases, the same concrete formwork 5 may have to be shared.
In such a case, after closing the mounting hole 6 previously opened on the molding surface of the mold frame 5, a new mounting hole 6 is opened at another position on the molding surface, and from the outside of the mounting hole 6. The male screw member 7 was inserted and the same work as the above work was performed.

However, when the work of opening and closing the mounting hole 6 on the molding surface of the concrete form 5 is repeated as described above, the form 5 is distorted and only a concrete block having poor dimensional accuracy can be obtained. At last, there was a problem that it would be impossible to produce.

The present invention has been made in order to solve the above-mentioned problems, and an object thereof is to provide a female screw at a desired position without opening or closing a mounting hole on a molding surface of a concrete formwork. It is an object of the present invention to provide a concrete block forming method capable of forming a concrete block provided with members and other metal fittings.

Another object of the present invention is to form a concrete block having a through hole or a recess at a desired position without opening or closing a mounting hole on a molding surface of a concrete formwork. A method of forming a concrete block is provided.

[0007]

The method for forming a concrete block according to the present invention has the following constitution in order to achieve the above object. That is, a magnet is attracted and fixed to the molding surface of the concrete mold, and the magnetic force of the magnet is used to fix and hold the female screw member and other metal fittings on the molding surface, and in the mold. Concrete is poured, and when the concrete is hardened, the mold is opened and the concrete block provided with the female screw member and other metal fittings is demolded. Here, the metal fittings are not limited to female thread members such as nuts, but collectively refer to various metal fittings including male thread members such as bolts. It does not have to be made of a magnetic metal such as iron, but may be made of a part of a magnetic metal such as iron, or even a magnetic metal powder such as iron powder adhered to the surface of a material different from iron. Good.

When the mold is opened, the magnet is
It is desirable to remove the concrete block provided with the female screw member and other metal fittings so that it does not adhere to the concrete side and remains on the molding surface side.

It is desirable that the female screw member and other metal fittings be fixedly held on the molding surface by being inserted into a hole or a recess provided in the magnet.

Further, it is desirable that a draft is formed on the thickness surface of the magnet to facilitate the escape from the hardened concrete.

Further, it is preferable that an edging material is attached to the outer periphery of the magnet for facilitating edging between the magnet and concrete poured into the mold.

Further, a magnet is attracted and fixed to the molding surface of the concrete formwork, and the magnetic force of the magnet is used to fix and hold the forming mold for forming the through hole or the concave portion on the molding surface. Further, concrete is poured into the mold, and when the concrete is hardened, the mold is opened to obtain a concrete block having the through hole or the recess.

Further, when the mold is opened, the concrete block having the through holes or recesses is removed so that the forming mold does not adhere to the concrete side and remains on the molding surface side. Is desirable.

Further, it is preferable that a draft surface is formed on the thickness surface of the forming die for forming the through hole portion or the concave portion so as to facilitate the escape from the hardened concrete.

[0015]

With the magnet fixed to the molding surface of the concrete form, the female screw member and other metal fittings are fixedly held on the molding surface by utilizing the magnetic force of the magnet.
Then, pour the concrete into the mold, and when the concrete hardens, when the mold is opened,
A concrete block provided with the female screw member and other metal fittings can be obtained.

Further, when the mold is opened, the magnet is
Since the concrete block provided with the female screw member and other metal fittings is demolded so that it does not adhere to the concrete side and remains on the molding surface side, it is not necessary to remove the magnet from the concrete side after demolding.

Further, when the concrete is poured into the mold, the female screw member and other metal fittings are inserted into the holes or the recesses provided in the magnet, so that the poured concrete is the female screw member and other metal fittings. Even if it hits against other objects, the female screw member and other metal fittings are supported by the holes or the depressions, so that there is no risk of misalignment.

When the mold is opened to separate the concrete form from the hardened concrete, the magnet is
Due to the draft formed on the thickness surface, it is possible to easily separate from the hardened concrete side.

When the mold is opened and the concrete form and the hardened concrete are separated, the magnet is
The edging material attached to its outer circumference allows for easy separation from the hardened concrete side.

Further, by utilizing the magnetic force of the magnet while the magnet is adsorbed and fixed to the molding surface of the concrete form,
A forming die for forming the through hole portion or the concave portion is fixedly held on the molding surface. Then, pour the concrete into the formwork, and when the concrete hardens,
When the mold is opened, a concrete block having the through hole or the recess is obtained.

When the mold is opened, the concrete block having the through holes or recesses is removed so that the forming mold does not adhere to the concrete side and remains on the molding surface side. , It is not necessary to remove the forming mold from the concrete side after demolding.

Further, when the mold is opened and the concrete mold and the hardened concrete are separated from each other, the forming mold for forming the through hole or the recess is formed on the thickness surface of the mold. The gradient allows easy separation from the hardened concrete side.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a concrete block forming method according to the present invention will be described below with reference to the drawings.

First, an embodiment in which a female screw member and other metal fittings are attached to a concrete block will be described. As an example of this concrete block, the concrete formwork 12 forming a concrete panel or the like is
For example, a common formwork that can form concrete panels of different sizes or dimensions with a single formwork, and molds it according to the size and dimensions of the concrete panel to be formed. A permanent magnet 16 as a magnet is attracted and fixed to a predetermined position on the surface 14 (see FIG. 1). Then, by utilizing the magnetic force of the permanent magnet 16, the female screw member 18 is fixedly held on the molding surface 14, and the concrete 20 is poured into the mold 12, and when the concrete 20 is hardened, When the frame 12 is opened, the concrete panel 22 having the female screw member 18 as shown in FIG. 2 can be removed from the mold.

Specifically, the concrete formwork 12 is, for example, a flat casting formwork in which the concrete 20 is poured from the upper side, and the forming surface 14 on the bottom side of the formwork 12 is used.
It is made of a material such as iron so that the permanent magnet 16 can be attracted and fixed at a predetermined position. As shown in FIG. 3, the permanent magnet 16 has, for example, a disk shape having a hexagonal hole 24, and the hole 24 has, for example, a hexagonal tubular female thread. Member 18
Can be inserted.

In this case, a slight play 25 is preferably formed between the outer surface side of the female screw member 18 and the inner surface side of the hole 24 (see FIG. 1). And this play 2
In order to prevent the poured concrete 20 from penetrating and hardening, it is desirable that the rim 5 contains an edging agent made of, for example, grease mixed with a retarder. Further, it is preferable that the edge of the permanent magnet 16 on the concrete 20 side is also coated with an edging agent such as the grease so that the poured concrete 20 does not come into contact with the permanent magnet 16 and harden.

On the outer periphery of the permanent magnet 16, in order to facilitate edging between the permanent magnet 16 and the concrete 20 poured into the mold 12, for example, an edging material made of a synthetic resin material. It is preferable that the edging ring 26 is attached. Further, the female screw member 18 is
The screw hole 18a is provided so that the screw shaft 28a of the male screw member 28 such as a bolt shown in FIG.
One side of the screw hole 18a, that is, the mold 12 side, covers the screw hole 18a so that the concrete 20 poured into the mold 12 does not enter the screw hole 18a. A thin material 28 such as a sheet, thin paper or thin cloth is attached.

On the other side of the screw hole 18a, that is, on the side opposite to the form 12 side, the poured concrete 2
In order to prevent 0 from entering the screw hole 18a, the screw hole 18a is closed, and when the concrete 20 is hardened, it is fixed to the concrete 20 and the female screw member 18 is prevented from coming off. Has been done.

Then, the female screw member 18 to which the retaining member 30 is fixed is inserted into the hole 24 of the permanent magnet 16 adsorbed and fixed at a predetermined position of the molding surface 14 of the mold 12, and the permanent magnet 16 is used. In a state where the concrete 20 is fixedly held, the concrete 20 is poured into the mold 12 by the thickness L of the concrete panel 22. At this time, even if the poured concrete 20 hits the female screw member 18, since the lower portion of the female screw member 18 is supported by the hole 24 of the permanent magnet 16, there is no risk of displacement.

When the concrete 20 poured into the mold 12 is hardened, the mold 12 is opened, and the concrete mold 12 and the hardened concrete 2
When 0 is separated, the concrete panel 22 can be taken out from the concrete form 12. At that time, the female screw member 18 leaves the permanent magnet 16 and remains on the hardened concrete 20 side together with the edging ring 26,
It will adhere to the concrete panel 22.

On the other hand, the permanent magnet 16 includes an edge cutting ring 26.
Due to the edging action such as the above, it does not adhere to the concrete 20 side and remains on the molding surface 14 side. In this way, the permanent magnet 16
It is desirable that the permanent magnet 1 remains on the molding surface 14 side.
When 6 is on the hardened concrete 20 side, the operator needs to remove the permanent magnet 16 from the concrete 20 side, but if it can be easily removed, the permanent magnet 16 will adhere to the concrete 20 side. It doesn't matter.

In this embodiment, for example,
As shown in FIG. 4, the four corners of the upper, lower, left and right, and
A concrete panel 22 to which the female screw member 18 is attached is formed at the upper center and the lower center. For example, as shown in FIG. 5, the concrete panels 22 are staggered in a staggered manner so that the mutual panels 22 are displaced from each other in the width direction by a length of about half. To the pair of female screw members 18 on one side of the concrete panel 22, the pair of female screw members 18 on the opposite side of the other concrete panel 22a, and the female screw members 18 at the center of the lower concrete panel 22a. The plurality of concrete panels 22 can be connected to each other by screwing the screw shafts 28a of the male screw members 28 through the holes (not shown).

The shape of the permanent magnet 16 may be changed as follows, for example. That is, the thickness surface 32a of the permanent magnet 32 shown in FIG. 6 may be formed with a draft for facilitating the escape from the hardened concrete 20, and in this case, the aspect of the above-described embodiment. Similarly, the permanent magnet 32 can be used (see FIG. 7). Then, due to the draft of the thickness surface 32a,
When the concrete mold 12 is opened to separate the mold 12 and the hardened concrete 20, the permanent magnet 32 is used.
Can be easily separated from the hardened concrete 20 side. Therefore, in the above-described embodiment, the edge cutting ring 26, which was necessary on the outer peripheral side of the permanent magnet 16, is
It is unnecessary in this embodiment. The draft of the thickness surface 32a does not necessarily have to be constant, and the permanent magnet 3 is not necessary.
It can be variously changed according to the shape of No. 2 and the like.

The shape of the permanent magnet 34 may be, for example, a ring shape as shown in FIG. 8, and the central hole 34a thereof has a hexagonal shape along the outer shape of the female screw member 18. A fitting member 36 having a hole 36a and made of, for example, a synthetic resin material may be fitted therein. However, the permanent magnets 16, 32, and 34 are not necessarily limited to the illustrated shapes, and may have other shapes such as a U-shape. Further, the external shape of the female screw member 18 does not necessarily have to be a hexagonal tubular shape, and may have various other shapes such as a cylindrical shape. Corresponding to the shape, or The hole 2 does not necessarily correspond to the shape.
The shapes of 4, 36a may also be various shapes.
Further, the permanent magnets 16, 32, 34 may have recesses instead of the holes 24, 36a, or may not have these holes 24, 36a or recesses. Good.

Further, what is fixedly held on the molding surface 14 of the mold 12 by utilizing the magnetic force of the permanent magnets 16, 32, 34 is not necessarily limited to the female screw member 18, and, for example, a bolt. And other metal fittings used for connecting the panel 22 to other objects, or other metal fittings, and these metal fittings are not necessarily entirely made of a magnetic material such as iron. It does not have to be made of a metal, and may be made of a part of a magnetic metal such as iron, or may be made of a material different from iron to which magnetic metal powder such as iron powder is attached. Further, the shape of the edging material is not necessarily limited to the ring shape, and can be variously changed according to the shape of the permanent magnets 16, 32, 34 and the like.

Next, another embodiment of the present invention for forming a concrete block having a through hole or a recess will be described.

As an example of this concrete block, the concrete formwork 42 forming a U-shaped concrete gutter can be formed with concrete gutters of different sizes or dimensions by one formwork, respectively. It is a shared formwork, and the permanent magnets 46a, 46 as magnets are provided at predetermined positions on the molding surface 44 thereof in accordance with the size and size of the concrete gutters to be formed.
b is attracted and fixed respectively, and the permanent magnet 4
A forming die 48 for forming a through hole portion is fixedly held on the molding surface 44 by using the magnetic force of 6a, and a concave portion is formed by using the magnetic force of the permanent magnet 46b. The mold 50 is fixedly held on the molding surface 44 (see FIGS. 9 and 10). Then, concrete 52 is poured into the mold 42, and when the concrete 52 is hardened, the mold 42 is opened, and a U-shaped mold having a through hole 54 or a recess 56 as shown in FIG. The concrete gutter 58 can be demolded.

Concretely, the concrete formwork 42 made of iron or the like is provided with hinges H on the front and rear and left and right sides of the base 42a.
A side plate 42b (only the side plate on the left side is shown) that can be opened and closed with the rotation fulcrum as a fulcrum is provided, and a middle die 42c is provided above the base 42a. Then, the through hole portion 54
The forming die 48 for forming the concave plate 56 is fixedly held on the molding surface 44 of the side plate 42b via the permanent magnet 46a attached to the bottom plate 48b, and the forming die 50 for forming the concave portion 56 is formed. , Is fixedly held on the molding surface 44 of the side plate 42b via a permanent magnet 46b attached to the inner surface thereof.

Further, the thickness surface 48 of the forming molds 48 and 50.
Since a and 50a have a draft for facilitating the escape from the hardened concrete 52,
When the mold 42 is opened and the concrete mold 42 and the hardened concrete 52 are separated, the forming molds 48 and 50 for forming the through holes 54 or the recesses 56 are
It can be easily separated from the side of the hardened concrete 52. However, the draft of the thickness surfaces 48a and 50a is
It may not necessarily be constant, can be variously changed according to the shape of the forming dies 48, 50, etc. Further, if not necessary, the draft may not be provided.

It is desirable that a mold release agent, which is an oil for molds, is applied to the surface sides of the forming molds 48 and 50 so that the poured concrete 52 does not stick. Then, on the molding surface 44 of the side plate 42b of the mold 42,
The permanent magnets 46a and 46b are attracted and fixed, and the forming magnets 48 and 5 are formed by utilizing the magnetic force of the permanent magnets 46a and 46b.
0 is fixedly held on the molding surface 44 of the side plate 42b, concrete 52 is poured into the mold 42, and when the concrete 52 is hardened, the mold 42
Open the mold. At that time, the forming molds 48 and 50 are fixedly held on the molding surface 44 by the permanent magnets 46a and 46b, and the concrete 52 cured together with the side plate 42b.
Because of the further separation, a U-shaped concrete gutter 58 having the through hole 54 and the recess 56 can be obtained.

As described above, the forming molds 48 and 50 together with the side plate 42b harden the concrete 52 when the molds are opened.
It is desirable that the molds 48 and 50 are separated from each other, that is, they do not adhere to the concrete 52 side.
When the mold is opened, it may be left on the side of the hardened concrete 52 apart from the permanent magnets 46a and 46b or together with the permanent magnets 46a and 46b. However, the operator needs to perform the work of removing the forming molds 48 and 50 from the concrete 52 side after the mold releasing.

The U-shaped concrete gutter 58 does not necessarily have to have both the through hole 54 and the recess 56, and may have either the through hole 54 or the recess 56. . Further, the shape of the through hole portion 54 or the recessed portion 56 is not necessarily limited to the shape of the illustrated embodiment, and may be another shape such as a circular shape.

The method of forming a concrete block according to the present invention is not limited to the case of forming a concrete panel, a U-shaped concrete gutter or the like as described above, and other gutters such as variable gutters can be used. In addition to the blocks, it can be carried out when forming other concrete blocks such as a retaining wall block such as an L-shaped retaining wall block and a box culvert.

Further, the concrete formwork 12, 42 used in the method for forming a concrete block according to the present invention does not necessarily have to be a common formwork as described above, and concrete of a specific size, size, shape, etc. It may be a dedicated form forming only blocks.

[0045]

As is clear from the above description, the concrete block forming method according to the present invention has the following effects.

According to the method for forming a concrete block described in claim 1, on the molding surface of the concrete formwork,
While adsorbing and fixing the magnet, by utilizing the magnetic force of the magnet, the female screw member and other metal fittings are fixed and held on the molding surface, and concrete is poured into the mold, and the concrete is hardened. , The mold is opened, and the female block member and the concrete block provided with the other metal fittings are demolded. Therefore, unlike the conventional method, in order to attach the female screw member and the other metal fittings,
It is not necessary to open the mounting hole in the concrete formwork.
Therefore, it is possible to easily form a concrete block provided with a female screw member and other metal fittings at a desired position without opening or closing the mounting hole in the molding surface of the concrete form. Also, when using a common concrete formwork, it is possible to freely change the size and dimensions of the concrete block to be formed without opening or closing the mounting hole in the molding surface, and the desired position. It is possible to easily form a concrete block including a female screw member and other metal fittings.

Further, according to the method for forming a concrete block described in claim 2, when the mold is opened, the magnet does not adhere to the concrete side and remains on the molding surface side. Since the concrete block provided with the female screw member and other metal fittings is removed from the mold, there is no trouble of removing the magnet from the concrete side after the mold is removed.

Further, according to the method of forming a concrete block described in claim 3, the female screw member and other metal fittings are inserted into the holes or the recesses formed in the magnet so that the molding surface is formed. Since it is fixedly held, even if it hits the female screw member and other metal fittings when concrete is poured into the formwork, the female screw member and other metal fittings are supported by the holes or depressions,
There is no risk of misalignment, and the fitting position of the metal fittings will not be misaligned.

Further, according to the method of forming a concrete block described in claim 4, since the draft surface for facilitating the escape from the hardened concrete is formed on the thickness surface of the magnet, When opening the formwork and separating the concrete formwork and the hardened concrete,
The magnet can be easily separated from the hardened concrete side.

Further, according to the method of forming a concrete block described in claim 5, an edge cutting for facilitating the edge cutting between the magnet and the concrete poured into the mold is provided on the outer circumference of the magnet. The material is attached so that when the mold is opened to separate the concrete form from the hardened concrete, the magnets can easily separate from the hardened concrete side.

Further, according to the method of forming a concrete block described in claim 6, a magnet is attracted and fixed to the molding surface of the concrete form, and the magnetic force of the magnet is utilized to form a through hole or a recess. To form
The forming mold is fixedly held on the molding surface, and concrete is poured into the mold, and when the concrete is hardened, the mold is opened and the concrete block provided with the through hole or the recess is removed. Since it is molded, it is not necessary to open a mounting hole in the concrete formwork in order to attach the forming mold to the concrete formwork. Therefore, it is possible to easily form a concrete block having a through hole or a recess at a desired position without opening or closing the mounting hole in the molding surface of the concrete form. Also, when using a common concrete formwork, it is possible to freely change the size and dimensions of the concrete block to be formed without opening or closing the mounting hole in the molding surface, and the desired position. It is possible to easily form a concrete block having a through hole portion or a concave portion therein.

Further, according to the method for forming a concrete block described in claim 7, when the mold is opened, the forming die does not adhere to the concrete side and remains on the forming surface side. Since the concrete block having the through-holes or recesses is removed from the mold, there is no trouble of removing the forming mold from the concrete side after the mold is removed.

Further, according to the method of forming a concrete block described in claim 8, in order to facilitate the escape from the hardened concrete on the thickness surface of the forming die for forming the through hole portion or the concave portion. Since the draft is formed, when the mold is opened and the concrete form and the hardened concrete are separated, the forming mold for forming the through hole or the recess is the hardened concrete. You can easily leave the side.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a method for forming a concrete block according to the present invention, showing a state in which a female screw member is attached to the concrete block.

FIG. 2 is a perspective view of a main part of a concrete block including the female screw member.

FIG. 3 is a front view of a permanent magnet that fixes and holds the female screw member.

FIG. 4 is an overall front view of a concrete block including the female screw member.

FIG. 5 is a diagram illustrating a state in which a plurality of concrete blocks are arranged and connected to each other.

FIG. 6 is a perspective view showing another example of a permanent magnet.

FIG. 7 is a view corresponding to FIG. 1 using a permanent magnet of another example.

FIG. 8 is a perspective view showing another example of a permanent magnet.

FIG. 9 is a cross-sectional view showing another embodiment of the method for forming a concrete block according to the present invention, showing a state in which a through hole is formed in the concrete block.

FIG. 10 is a sectional view showing a state in which a concave portion is formed in the concrete block, which is the same as another embodiment.

FIG. 11 is a perspective view of a concrete block including the through hole and a recess.

FIG. 12 is a cross-sectional view showing a conventional method of forming a concrete block, showing a state in which a female screw member is attached to the concrete block.

[Explanation of symbols]

12 42 Concrete formwork 14 44 Forming surface 16 32 34 34a 46b Permanent magnet (magnet) 18 Female screw member 20 52 Concrete
24 36a hole 22 concrete panel (concrete block)
32a Thickness surface 26 Edge cutting ring (edge cutting material) 48 Forming die for forming through hole 50 Forming die for forming recess 48a 50a
Thickness surface 54 Through hole portion 56 Recessed portion 58 U-shaped concrete gutter (concrete block)

Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location B28B 23/00

Claims (8)

[Claims] 1. A magnet is attracted and fixed to a molding surface of a concrete formwork, and the magnetic force of the magnet is used to fix and hold a female screw member and other metal fittings on the molding surface. A method for forming a concrete block, in which concrete is poured into a frame, and when the concrete hardens, the mold is opened and the concrete block provided with the female screw member and other metal fittings is demolded. 2. The magnet, when the mold is opened,
The method for forming a concrete block according to claim 1, wherein the concrete block provided with the female screw member and other metal fittings is demolded so that it does not adhere to the concrete side and remains on the molding surface side. 3. The concrete according to claim 1, wherein the female screw member and other metal fittings are fixedly held on the molding surface by being inserted into a hole or a recess provided in the magnet. Block formation method. 4. The formation of the concrete block according to claim 1, wherein a draft is formed on a thickness surface of the magnet for facilitating the escape from the hardened concrete. Method. 5. The edging material is attached to the outer periphery of the magnet for facilitating edging between the magnet and concrete poured into the mold. The method for forming a concrete block described in 1. 6. A molding die for adsorbing and fixing a magnet on a molding surface of a concrete formwork, and using the magnetic force of the magnet to fix and hold a forming die for forming a through hole or a concave portion on the molding surface. And a method for forming a concrete block, in which concrete is poured into the mold, and when the concrete is hardened, the mold is opened and the concrete block having the through hole or the recess is demolded. 7. The concrete block having the through-hole portion or the concave portion is demolded so that when the mold is opened, the forming mold does not adhere to the concrete side and remains on the molding surface side. The method for forming a concrete block according to claim 6. 8. The method for forming a concrete block according to claim 6, wherein a draft is formed on the thickness surface of the forming mold to facilitate the escape from the hardened concrete.