JP3511261B2 - Forming form of concrete block having concave portion and method of forming block using the form - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding block for a concrete block and a block molding method using the same, and more particularly to a molding block for a concrete block having a recess and a block molding method using the same. .

[0002]

2. Description of the Related Art In recent years, concrete blocks having recesses as shown in FIGS. 1 (a) and 1 (b) have been developed. Concrete block 1 having such a recess
Is an environmentally friendly structure, for example, by stacking it on the shore as shown in FIG. 1 (b) and allowing the propagation of plants in the recess 2 or allowing the recess 2 to function as a fish reef. It has been done.

By the way, in the concrete block 1 as described above, the concave portion 2 is not simply a flat concave portion, but the concave portion 2 allows the growth of plants and plays a role of a fish reef. It is desirable that the other concave portion 3 be present in 2 (FIG. 1 (b), FIG. 2 (d), (e)).

However, it has not been easy to mold a concrete block in which another concave portion is formed in the concave portion using a mold. In the conventional method, generally, two different molds are used and two such different steps are used to mold such a concrete block having a concave portion 2 having another concave portion 3 therein. Therefore, the manufacturing cost and the manufacturing time are inevitably large.

[0005]

The present invention is based on FIG.
Recessed portion 2 further having another recessed portion 3 therein, as exemplified in (a), (b) and FIGS. 2 (a) to 2 (f).
A mold for use in molding a concrete block 1 having a shape, wherein a concrete block having such a recess having a complicated shape can be easily molded in a single molding step using a single mold. It is an object of the present invention to propose a molding frame for a concrete block having a possible recess and a block molding method using the frame.

[0006]

The present invention is used for forming an outer mold for forming an outer peripheral wall of a concrete block having a recess to be molded, and for forming a first recess in a concrete block having a recess to be molded. A mold form of a concrete block having a recess consisting of a middle mold and a middle mold, the middle mold projecting its peripheral wall plate to form a second recess further formed in the first recess. Then, the protruding state is maintained during the molding process of the concrete block (that is, while the concrete is being put into the molding frame of the concrete block having the concave portion composed of the outer mold and the middle mold and cured). In addition to being able to maintain, the protruding peripheral wall plate can be restored to its original state during the demolding process of the concrete block having the molded recess. Configuring, ie, by returning the wall plate is the projection to the original state,
The above problem is solved by configuring the middle mold so that it can be pulled out from a concrete block having molded first and second recesses.

That is, the mold for forming a concrete block having a concave portion proposed by the present invention is composed of an outer mold and a middle mold, both of which are configured as follows. To do.

First, the outer mold is composed of a wall plate and a plurality of side wall plates whose one end is attached to the peripheral edge of the wall plate. Included is at least one side wall plate that is pivotally attachable to.

On the other hand, the middle die has a plurality of peripheral wall plates formed from a plurality of wall bodies that are erected on the outer die wall plate, and has the following characteristic structure. .

That is, at least one peripheral wall plate in the middle peripheral wall plate is one of the outer peripheral wall plates whose one end side is rotatably attached to the peripheral edge of the wall plate. A movement of rotating at least one side wall plate of the at least one side wall plate so as to bring the other end side centering on one end side rotatably attached to the wall plate peripheral edge so as to approach the middle size, and the other end side Interlocking with the movement of turning away from the medium size, one peripheral edge side of the peripheral wall plate is centered, and the other peripheral edge side opposite to the one peripheral edge side being the center is projected, and It is configured to be rotatable so as to return to the state.

In the above, the middle mold is a mold for forming the recess 2 of the concrete block 1 illustrated in FIG. 1A (this corresponds to the first recess), and the outer mold is the mold. In the concrete block 1 illustrated in FIG. 1 (a), FIG. 2 (a), and (b), for example, the front surface 4,
It is a mold that forms outer peripheral walls such as a bottom surface 9, a right side surface 5, a left side surface 6, and an upper surface 8.

A side wall plate whose one end side is rotatably attached to the peripheral edge of the wall plate of the outer mold is rotated so that the other end side approaches the middle mold centering on the one end side. When assembling the at least one side wall plate, at least one of the medium-sized peripheral wall plates is linked to the rotational movement of at least one of the rotating side wall plates. With the center as the center, the other peripheral side opposite to the one peripheral side as the center is projected. The middle-sized peripheral wall plate of the assembled molding frame, the other peripheral side of which protrudes, is the concave portion 3 in the concave portion 2 of the concrete block 1 shown in FIG. (Corresponding to a recess).

Therefore, concrete is filled into the assembled molding frame to mold the block. During the molding process of this concrete block, as described above,
The concave portion 2 (first concave portion) further includes the concave portion 3 (second concave portion).
That is, the protruding state of the middle-sized peripheral wall plate, which has been protruded on the other peripheral edge side in order to form the above, is maintained.

After the concrete is hardened, the side wall plate whose one end side is rotatably attached to the peripheral edge of the wall plate of the outer mold is rotated so that the other end side is separated from the middle mold centering on the one end side. Then, in conjunction with the rotational movement of at least one side wall plate of the rotating side wall plate, the other peripheral edge side of the protruding of at least one peripheral wall plate of the medium-sized peripheral wall plate is , And returns to the original state by rotating around one peripheral edge side of the middle-sized peripheral wall plate. As a result, the peripheral wall plate of the middle size, which has the other peripheral edge side projected to form the further recessed part 3 (second recessed part) in the recessed part 2 (first recessed part), returns to the original state, From the concrete block having the molded first and second recesses.

A series of recessed concrete blocks are then removed by removing the molded block from the middle mold, that is, by removing the middle mold from the molded concrete block having the first and second recesses. The molding is completed.

As described above, according to the molding frame and the molding method of the present invention, a concrete block having a concave portion having another concave portion inside is molded into a single mold consisting of an outer mold and a middle mold. It can be easily carried out in a single molding step by using only. Further, in order to form the second concave portion to be molded in the first concave portion, the movement of the peripheral wall plate protruding and retracting from the first concave portion forming middle die can be freely rotated to the peripheral edge of the outer die wall plate. Since it can be performed in conjunction with the rotational movement of at least one of the side wall plates attached to the, the formwork is constructed by an extremely simple procedure, and the other recesses are provided inside. A concrete block having a recess can be easily molded.

In the above-mentioned concrete block molding mold having a recess according to the present invention, at least one side wall of the side wall plate of the outer mold, one end side of which is rotatably attached to the peripheral edge of the wall plate. Movement of the plate about the one end rotatably attached to the peripheral edge of the wall plate so that the other end approaches the middle mold, and the other end moves away from the middle mold. In association with each movement, one of the peripheral sides is the center, and the other peripheral side opposite to the one peripheral side that is the center is projected and rotated so as to return to the original state. The peripheral wall plate may be configured to perform the rotating operation in conjunction with the rotation of the outer side wall plate at the opposite position.

Further, a plurality of the above-mentioned middle molds in which the peripheral wall plate is formed from a plurality of wall bodies which are erected on the outer mold wall plate can be erected on the outer mold wall plate. In this way, it is possible to mold a concrete block having a recess provided with a plurality of recesses 2 each having another recess 3 formed therein.

[0019]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 3 is a plan view of the molding block 10 of the concrete block having a recess of the present invention in an unassembled state.

As shown in FIG. 4, the middle mold 16 is erected on the wall plate 11 supported on the base 27 (FIGS. 3 and 4). As shown in FIG. 3, a plurality of (four in the embodiment shown in FIG. 3) peripheral wall plates of the middle die 16 are provided upright on the wall plate 11 (four in the embodiment shown in FIG. 3). It is composed of a wall.

The concrete block molding mold 10 of the present invention comprises a middle mold 16 and an outer mold.
The outer mold includes a wall plate 11 and a peripheral edge of the wall plate 11 at one end side (see FIG.
A plurality of side wall panels which embodiments the bottom side of the illustrated) is attached (four in the embodiment of FIG. 3 shown) 12,1
It is composed of 3, 14, and 15. At least one side wall plate among the plurality of side wall plates 12, 13, 14, 15 is rotatably attached to the peripheral edge of the wall plate 11 on one end side (FIG. 3). In the illustrated embodiment , the lower end sides of the four side wall plates 12, 13, 14, and 15 are rotatably attached to the peripheral edge of the wall plate 11.).

The outer mold is a mold which functions to form an outer peripheral wall of a concrete block molded by using the concrete block molding mold 10 having the concave portion of the present invention.
For example, when the concrete block having a recess to be molded is the concrete block 1 illustrated in FIGS. 1A, 2A, and 2B, depending on the outer mold, the front surface 4, the bottom surface 9, the right side, Outer peripheral walls such as the surface 5, the left side surface 6, and the upper surface 8 are formed. At this time, for example, the wall plate 1
1 forms the front surface 4 of the concrete block 1 shown in FIGS. 1 (a), 2 (a) and 2 (b), the side wall plate 12 forms the bottom surface 9, the side wall plate 13 forms the right side surface 5, and the side wall plate. The left side surface 6 is formed by 15, and the upper surface 8 is formed by the side wall plate 14.

Here, in the case of this embodiment, the side wall plate 1
2 forms a recess 20 (FIG. 2C) on the bottom surface 9 side of the concrete block 1, and the projection 21 on the side wall plate 14 forms a recess 22 on the upper surface 8 side of the concrete block 1 (FIG. 2C). 2 (b) is formed, and the projections 23c on the upper surface 8 side of the concrete block 1 are formed by the recesses 23a and 23b in the side wall plate 14,
23d (FIG. 1A) is formed.

On the other hand, the middle mold 16 functions to form the concave portion 2 of the concrete block 1 illustrated in FIG. 1A, and the protrusion provided on the upper side of the middle mold 16 in FIG. Through holes 18a provided in the back of the recess 2 of the concrete block 1 by 17a and 17b,
18b (FIG. 1 (a), (b), FIG. 2 (d)) is formed.

Side wall plates 12, 13, 1 on the periphery of the wall plate 11
As shown in FIG. 3, for example, the lower end side of the side wall plate 4 is attached to the rotary shaft 25 attached to the distal end side of the arm rod 24 extending from the wall plate 11 side.
It is possible to adopt a configuration in which the tip end side of the arm rod 26 extending from the lower end side of 2, 13, 14, and 15 is rotatably attached.

In this embodiment, since the wall plate 11 having four circumferences is used, the concrete block 1 having a hexagonal concave portion can be molded as shown in FIG. If a wall plate having a five-sided peripheral edge is used, it is possible to mold a concrete block having a concave portion that becomes a heptahedral, and if a wall plate having a six-sided peripheral edge is used, a concrete block having a concave portion that becomes an octahedron can be molded. .

In the molding block 10 for a concrete block having a recess according to the present invention, at least one peripheral wall plate (in the illustrated embodiment, the peripheral wall plate 28) of the peripheral wall plates of the middle mold 16 is Is configured. That is,
The outer side wall plate 12 at a position facing the peripheral wall plate 28 is
Centering on the lower end side attached to the peripheral edge of the wall plate 11,
When the upper end side is rotated in the direction of approaching the middle mold 16 as shown by the arrow 34a, one peripheral side (in the embodiment shown in FIGS. 3 and 4 the upper peripheral side is interlocked with the rotational movement). )
With respect to the other peripheral edge side (in the embodiment shown in FIGS. 3 and 4;
The lower peripheral side) is projected as shown by the arrow 38a.
On the other hand, when the side wall plate 12 of the outer mold rotates about the lower end side attached to the peripheral edge of the wall plate 11 in the direction of moving the upper end side away from the middle mold 16 as indicated by the arrow 34b, the rotational movement thereof is performed. In conjunction with one of the peripheral side (upper peripheral side)
With the center as the center, the other peripheral side (lower peripheral side) facing the one peripheral side that is the center is configured to be returned to the original state as indicated by arrow 38b ( (Fig. 4).

Such a medium-sized peripheral wall plate interlocked with the rotational movement of the outer side wall plate causes one peripheral edge side to be the center of the rotational movement so that the other peripheral edge side projects or returns to its original state. Can be realized as follows, for example.

That is, as shown in FIG. 4, the upper end side of the peripheral wall plate 28 of the middle die 16 is rotatably attached to the rotary shaft 29 fixed to the upper end side in the middle die 16, and the peripheral wall plate 28 is rotated. A rotary shaft 30 is rotatably attached to the lower end side of the. Then, one end side of a link rod 31 is rotatably attached to the rotary shaft 30.
The other end side is rotatably attached to a rotary shaft 32 rotatably attached to the base end side of a support rod 33 whose front end side is fixed to the side wall plate 12.

Therefore, the outer side wall plate 12 is centered on the front end side of the arm rod 26 rotatably attached to the front end side of the arm rod 24 extending from the wall plate 11 side (that is, the side wall). If the lower end side of the plate 12 is used as the center of the rotational movement and its upper end side is moved closer to the middle die 16 as indicated by the arrow 34a, the link rod 31 moves in the arrow 39a direction. Along with this, the lower end side of the peripheral wall plate 28 of the middle die 16 whose upper end side is rotatably attached to the rotary shaft 29 fixed to the upper end side in the middle die 16 is indicated by an arrow 38a.
Project like.

On the other hand, the outer side wall plate 12 is pivoted about the lower end side thereof (that is, the distal end side of the arm rod 24 extending from the wall plate 11 side so that the upper end side thereof is separated from the middle mold 16). When the arm rod 26 which is freely attached is rotated about the tip end side of the arm rod 26) as indicated by an arrow 34b, the link rod 31 moves in the direction indicated by an arrow 39b, and the peripheral wall plate 28 of the middle die 16 is indicated by an arrow. 38b, the rotary shaft 29 fixed to the upper end side in the middle die 16 is rotated to return to the original state shown by the chain line 28 in FIG. 4, that is, the state shown in FIG. To do.

The peripheral wall plate 28 of the middle die 16 is shown in FIG.
Which serves to form the concave portion 3 in the concave portion 2 of the concrete block 1 shown in FIG. 2, and by the wall portions 28 a and 28 b extending downward in the peripheral wall plate 28,
Each of the walls 3 in the recess 3 of the concrete block 1
a and 3b (FIG. 2D) will be formed.

Hereinafter, a method of molding a concrete block having a concave portion according to the present invention, which uses the above-mentioned mold, will be described.

Side wall plates 12 and 1 each having a lower end rotatably attached to each of four circumferences of a wall plate 11 using a mold 10 for a concrete block having a recess according to the present invention.
Assembling the molding form by rotating 3, 14, 15 upwardly of the wall plate 11 as indicated by arrows 34a, 35a, 36a, 37a around the lower end side thereof.

At this time, as described above, the peripheral wall plate 28 of the middle die 16 projects as shown by the arrow 38a in conjunction with the rotational movement of the side wall plate 12 in the direction of the arrow 34a.

The upper end side of the assembled molding frame is fixed by a fixture 40 or the like, concrete 41 is filled in the assembled molding frame and hardened to mold the block (FIG. 4).

In the step of molding the concrete block 1, the peripheral wall plate 28 of the middle mold 16 protruding as shown in FIG. 4 is formed by the above-mentioned link mechanism and the fixture 40 at the upper end side of the assembled molding frame. By being fixed, the protruding state is maintained.

The concrete block molded in this way is composed of the above-mentioned wall plate 11, side wall plates 12, 13, 14, and 1.
5, the middle mold 16 and the peripheral wall plate 28 of the middle mold 16 play according to their respective roles during concrete block molding, as shown in FIG. 1A, the front surface 4, the right side surface 5, the left side surface 6, the top surface 8, the bottom surface 9 In addition to the above, the front surface 4 is formed with the concave portion 2 and the concave portion 2 is further formed with the concave portion 3. In addition, in this embodiment, the back surface 7 (FIG. 2B) of the concrete block 1 is on the upper side of the molding frame 10 assembled as described above, and the concrete 41 is filled in the molding frame 10. It is formed in the direction of coming.

When the concrete is hardened as described above and the concrete block 1 is molded, the peripheral wall plate 28 of the middle mold 16 projects as shown by the solid line in FIG. The molded concrete block 1 cannot be lifted upward in FIG. 4 and pulled out from the middle mold 16.

However, in the concrete block molding form 10 of the present invention, the peripheral wall plate 28 of the middle mold 16 is interlocked with the rotational movement of the outer side wall plate 12 in the direction of the arrow 34b (FIG. 4). The original state shown in FIG. 3 can be restored.

Therefore, after the concrete has hardened and the concrete block 1 has been molded, the fixtures 40 and the like are removed, and the side wall plates 12, 13, 14, 15 are indicated by the upper ends of the side walls 12, 13, 14, 15 respectively. 34b, 35b, 3
6b and 37b (FIG. 3), the side wall plate 1 is rotated.
2, the peripheral wall plate 28 of the middle die 16 is simultaneously shown in the original state shown in FIG. 3 as indicated by the arrow 38b, that is, indicated by the one-dot chain line 28 in FIG. To return to the existing state.

As a result, the concave portion 2 on the front surface 4 is further depressed in the concave portion 3.
Since it is possible to pull out the concrete block 1 in which the molding is performed from the middle mold 16, the concrete block 1 in which the molding is performed is removed from the middle mold 16 and the concrete block 1 having the desired recesses 2 and 3 is formed. It can be molded in a single molding step using a single mold.

The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to such embodiments, and within the technical scope grasped from the description of the claims. It can be changed into various forms.

For example, a concrete block having a recess 2 having a further recess 3 therein is shown in FIG.
Not limited to the configurations illustrated in (a), (b), and FIGS. 2 (a) to 2 (f), one outer wall surface (outer peripheral wall) is provided with a recess, and the recess Any concrete block having another recess therein can be molded by the molding frame of the present invention and the block molding method using the same.

In addition, in the above-described embodiments, the attachment of one end side (for example, the lower end side) of a plurality of side wall plates to the peripheral edge of the outer type wall plate is rotatable, but it is molded. If the concrete block can be demolded, some of the plurality of side wall plates can be fixedly attached to the peripheral edge of the wall plate at one end side thereof. When assembling the mold 10 and when removing the mold 10 for demolding the concrete block, one end side of the side wall plate of the outer mold which is rotatably attached to the peripheral wall plate of the outer mold is At least one outer wall is formed so that any one of the middle-sized peripheral wall plates appears and disappears in conjunction with the rotational movement around the center of rotation so that the second recess is further formed in the first recess. It is desirable that one end of the side wall plate of the mold is rotatably attached to the peripheral edge of the wall plate of the outer mold. That is, as described above, if the molded concrete block can be released from the mold, all of the plurality of side wall plates attached to the peripheral edge of the outer mold wall plate can be freely rotated to the peripheral edge of the outer mold wall plate. No need to attach to.

Further, the arrows 34a, 34b of the side wall plate 12 and the like are shown.
The number of peripheral wall plates of the middle-sized mold 16 that appears and disappears in the direction of approaching the side wall plate 12 and the like in association with the rotational movement indicated by, etc. is only one surface as in the above-described embodiment. It is not necessary to set
It is also possible to adopt a configuration in which, in association with the rotational movement of the outer side wall plates facing each other, the outer side wall plates move in a direction approaching the side wall plate and so as to return to the original state. For example, as described above, the peripheral wall plate 28 of the middle die 16 is replaced by the arrow mark 3 of the side wall plate 12.
4a and 34b are interlocked with the rotary movement, and the arrow 38
In addition to appearing and disappearing like a and 38b, the peripheral wall plate 28a (FIG. 4) of the middle mold 16 also interlocks with the rotational movement of the side wall plate 14 of the outer mold that faces the side wall plate 14 and approaches the side wall plate 14 again. It is also possible to adopt a configuration in which the members appear and disappear so as to return to the state of.

In addition, the peripheral wall plate of the middle die 16 which appears in and out in this manner does not interlock with the rotational motion of the side wall plate of the outer mold which opposes, but interlocks with the rotational motion of the side wall plate of the outer mold which does not oppose. It can also be configured. For example, the inward and outward movements indicated by the arrows 38a and 38b of the peripheral wall plate 28 of the middle die 16 do not correspond to the arrows 36a and 3a of the outer die side wall plate 14 which are not opposed to each other.
It can be configured to interlock with the rotational movement shown at 6b. In this case, the link mechanism including the link rod 31 and the like is provided on the lower end side of the outer side wall plate 14,
It is formed between the middle wall 16 and the lower end of the peripheral wall plate 28.

Further, in the above-described embodiment, the peripheral wall plate 28 of the middle die 16 is moved around the upper end thereof in the direction of approaching the opposing side wall plate 12 and in the direction of returning to the original state. It is also possible for the peripheral wall plate 28 to move about the lower end side thereof.

Further, the lower wall side of the side wall plate 12 and the like is rotatably attached to the wall plate 11, and the peripheral wall plate of the middle die 16 is interlocked with the rotational movement of the outer side wall plate 12 and the like. The configuration of moving in the direction of approaching to and returning to the original state is not limited to the one described in the above embodiment, and a known configuration capable of exhibiting the same function can be adopted.

[0051]

According to the present invention, as shown in FIG.
(B) A molding form used for molding a concrete block having a recess 2 having another recess 3 therein, as exemplified in FIGS. 2 (a) to 2 (f). , A concrete block molding mold with a concave part that can easily mold a concrete block having such a complicated concave part in a single molding process, It is possible to provide a method for molding the existing block.

[Brief description of drawings]

FIG. 1 is an example of a concrete block having a recess formed by the molding frame of the present invention and a block molding method using the same, in which (a) is a perspective view and (b) is used in a stack. Sectional drawing seen from the side direction explaining the state where it is.

FIG. 2 is an example of a concrete block having a recess formed by a molding frame of the present invention and a block molding method using the same, in which (a) is a plan view, (b) is a right side view, 2C is a sectional view taken along the line AA in FIG. 2A, FIG. 2D is a sectional view taken along the line BB in FIG. 2A, and FIG.
FIG. 2F is a sectional view taken along the line C-D in FIG. 2A.

FIG. 3 is a plan view of the molding frame of the present invention in an unassembled state.

FIG. 4 is a sectional view taken along the line EE in FIG. 3 for explaining the operation of the molding frame of the present invention during assembly.

[Explanation of symbols]

1 Concrete block with recess 2 Concrete block recess (first recess) 3 Concrete block recess (second recess) 11 wall boards 16 Medium 12, 13, 14, 15 Side wall plate 28, 28a Medium size 16 peripheral wall plate 10 Concrete Block Formwork

─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP2000-87435 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B28B 1 / 00-23 / 22

Claims (7)

(57) [Claims] And 1. A outer mold used to form the outer peripheral wall of concrete blocks having a concave portion to be molded, a middle- Toka Lana Ru recess used for forming the first recess in the concrete block having a recess molded A molding form of a concrete block having, (1) the middle mold has a peripheral wall plate for forming a second recess further formed in the first recess, (2) the peripheral wall The plate has one end that can be rotated by a rotating shaft.
Installed in the middle mold, the other end is one end of the link mechanism
(3) Rotate the other end of the link mechanism to the side wall plate of the outer mold.
Be mounted freely moving, (4) a peripheral wall plate coupled to the link mechanism, a state of the projecting is protruded peripheral wall plate, during the molding process of the concrete blocks having a concave portion, it is possible to maintain, molding It is configured such that the protruding peripheral wall plate can be returned to the original state during the demolding process of the concrete block having the recessed portion . A concrete block molding form having a concave portion characterized by the above. 2. A mold for concrete block molding having a concave portion composed of an outer mold and a middle mold, wherein: (1) the outer mold has a wall plate and a plurality of one ends attached to the peripheral edge of the wall plate. Like is composed of a side wall plate, in the side wall plate, sidewall plate attached to the wall plate peripheral edge of its one end is pivotable is contained at least one, (2) In the middle mold, a plurality of peripheral wall plates are formed from a plurality of wall bodies that are erected on the outer mold wall plate, and (3) " at least one peripheral wall plate " in the middle mold peripheral wall plate. Is a medium-sized product whose one end is rotatable by a rotary shaft.
Installed inside and rotate the other end to one end of the link mechanism
Mounted for (4) the other end of the link mechanism, in the outer mold sidewall plate, "at least one in the side wall plate whose one end is rotatably mounted on the peripheral edge of the wall plate Attached to one side wall plate "
Only, (5) the "at least one of the peripheral wall board", and around the front SL one end side of said "at least one of the side walls"
Then, interlocking with the movement of rotating the other end side so as to approach the middle mold and the movement of rotating the other end side away from the middle mold, centering on one peripheral edge side of the peripheral wall plate. The other peripheral side, which faces the one peripheral side that is the center, is projected and is rotatable so as to return to the original state . A concrete block molding form having a concave portion characterized by the above. 3. An outer mold rotatably attached to the peripheral edge of the wall plate of at least one of the side wall plates whose one end side is rotatably attached to the peripheral edge of the wall plate. With one end side being the center, the other end side is rotated so as to approach the middle mold and the other end side is rotated so as to be away from the middle mold. The outer peripheral side wall plate at the opposite position is the middle type peripheral wall plate that protrudes and rotates the other peripheral side opposite to the one peripheral side that is the center and returns to the original state. The mold for molding a concrete block having a recess according to claim 2, wherein the rotating operation is performed in association with the rotation of the. 4. An outer mold and a middle mold for forming the first recess.
For forming a concrete block having a concave section consisting of
Which is characterized by being configured as follows.
Formwork for cleat block molding. (1) The compound that constitutes the outer mold is formed on the periphery of the wall plate placed on the base.
Install several side wall boards. (2) The middle mold is erected on the wall plate and the middle mold is constructed.
Of the peripheral wall plate formed, a second recess is formed in the first recess.
Form the "at least one peripheral wall plate" on the upper side
It is rotatably attached to the rotating shaft fixed to the upper end side in the middle mold.
wear. Link to the lower end of "at least one peripheral wall plate"
Mount one end of the rod rotatably. (3) Among the side wall plates, the "at least one peripheral wall"
In a position opposite to the plate, "" at least one side wall plate "
Is rotatably attached to the wall plate. (4) Support at the lower end side of the "at least one side wall plate"
The tip side of the rod is fixed, and the link is attached to the base end side of the supporting rod.
Attach the other end of the rod rotatably. (5) The link rod is configured to operate as follows.
It was (a) The upper end of the “at least one side wall plate” is the middle size
When rotating in the direction of getting closer to the
Rotate at least one peripheral wall plate around the rotation axis on the upper end side.
To the protruding position. (b) The upper end of the “at least one side wall plate” is the middle size
When turning in a direction away from the
Rotate at least one peripheral wall plate around the upper end rotation axis
And return it to its original position. 5. A plurality of the middle dies in which a peripheral wall plate is formed from a plurality of wall bodies erected on the outer mold wall plate are erected on the outer mold wall plate. 2 through claim to
A molding form of a concrete block having a recess according to 4 . 6. The concrete block using the molding block for a concrete block having a recess according to claim 1, wherein concrete is put into the molding frame of the concrete block having a recess composed of the outer mold and the middle mold and cured to harden the concrete block. While performing the molding of, while maintaining the projecting state of the peripheral wall plate of the middle-sized, which is projected to form the second recess further formed in the first recess, After molding a concrete block having a concave portion, the projecting peripheral wall plate is rotated by a rotary shaft to return to the original state, and the concrete block having the first and second concave portions formed by molding the middle mold. A method for molding a concrete block having a concave portion, characterized in that the mold is removed from the mold. 7. A side wall plate, one end of which is rotatably attached to a peripheral edge of a wall plate of an outer mold, using the mold for molding a concrete block having a recess according to any one of claims 2 to 5. Is rotated about the one end side so as to bring the other end side closer to the middle mold to assemble the molding form, the rotational movement of at least one side wall plate in the rotating side wall plates by linking, at least one in the wall plate of the medium-sized, one peripheral side of the peripheral wall plate, by rotating the rotary shaft as <br/> center, periphery of one surface is generated using the center The other peripheral side facing the edge is projected to assemble a concrete block molding form, then concrete is filled into the assembled molding form to mold the block, and then the outer mold wall plate One end side is attached to the periphery of The side wall plate that is rotating so as to move the other end side away from the middle mold with the one end side as a center, and is interlocked with the rotational movement of at least one side wall plate among the rotating side wall plates. , The at least one peripheral wall plate of the middle-sized peripheral wall plate, the other protruding side of the peripheral wall plate is rotated about an axis of rotation of one peripheral side of the middle-sized peripheral wall plate to the original state. A method of molding a concrete block having a recess, wherein the molded block is restored and then the molded block is extracted from the middle mold.