JP3188331B2 - Concrete block formwork - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete block formwork.

[0002]

2. Description of the Related Art Conventionally, a T-shaped retaining wall block, for example,
It is formed from a front wall and a butting wall extending rearward from the rear surface of the front wall, and a reinforcing bar insertion hole is formed in the butting wall so as to penetrate vertically, and such a retaining wall block is formed. The formwork is formed from a formwork body for forming the outer shape of the retaining wall block and a core for forming the reinforcing bar insertion hole.

As the core, a vinyl chloride cylinder or a thin iron cylinder is used.
Because it is difficult to extract, it is buried in the buttress,
It is in a so-called fit-kill state.

[0004]

However, in the above-described mold, when a vinyl chloride cylinder is used as the core, the rebar is inserted into the rebar insertion hole formed in the cylinder and the rebar is inserted. Even when mortar or concrete for holding the reinforcing steel is cast, there is a problem that the mortar or concrete slips and does not adhere to the inner surface of the cylinder because the cylindrical body is made of vinyl chloride and the inner surface is smooth.

On the other hand, when an iron cylinder is used as the core, the cylinder is rusted, and also in this case, there is a problem that mortar and concrete have poor adhesion, and it takes time to remove rust. There is a problem.

[0006]

Therefore, according to the present invention, there is provided a formwork body for forming an outer shape of a concrete block and a core for forming a through hole such as a reinforcing bar insertion hole in the concrete block. Equipped with a core, a rubber core, and a foldable core body that is inserted into the rubber core to form and hold the rubber core in the shape of the inner surface of the through hole. And a core assembly holder which is inserted into the core body to hold the core body in an assembled state for forming the inner surface of the through hole.
It is provided with third and fourth core body division forming pieces, and one side edge of each core body division forming piece is connected in series and is rotatably connected to form a through hole inner surface. It can be expanded and contracted between a closed substantially rectangular cylindrical assembly state and a triangular cylindrical folded state, and the core assembly holder is in the internal space of the cylindrical part of the core body folded into a triangular cylindrical shape. The holder body can be inserted into a bottomed cylindrical holder, an air injection valve is attached to one end opening of the holder body, and air is injected into the holder body from the air injection valve. By expanding the main body, the core main body is changed from a triangular cylindrical folded state to a closed quadrilateral cylindrical assembled state, and can be held in the same assembled state. It will not be provided.

Further, according to the present invention, a guide cylinder is inserted into a rubber cylinder, and the rubber cylinder is shaped by the guide cylinder, and the rubber cylinder is guided in the same shape. The core body is inserted into the core insertion hole formed in the mold body via the cylinder, and the core body folded from one end side is inserted into the rubber cylindrical body retained by the guide cylinder, and Another feature is that the guide tube is pushed out from the other end of the rubber tube.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

A shown in FIGS. 1 to 3 is a formwork according to the present invention, and B shown in FIG. 9 is a retaining wall block as a concrete block formed by the formwork A.

First, the retaining wall block B will be described. As shown in FIG. 9, the retaining wall block B has a rectangular plate-like front wall 1 and a rearward side from the left and right sides of the rear surface of the front wall 1. It is formed of a pair of left and right retaining walls 2, 2 formed by extending, and each of the retaining walls 2, 2 is provided with two rebar insertion holes 3, 3 as two through holes in a vertically penetrating state. Has formed.

The reinforcing bar insertion hole 3 has a substantially rectangular shape.
The rebar is inserted into the rebar insertion hole 3 and mortar or concrete is cast.

Next, the mold A according to the present invention for forming the retaining wall block B will be described.

That is, as shown in FIGS. 1 to 3, the mold A includes a mold body 10 for molding the outer shape of the retaining wall block B, and a core 11 for molding the rebar insertion hole 3. And formed from. F is a form mounting surface.

The frame body 10 includes a bottom frame 12 for molding the front surface of the retaining wall block B, and a lower end edge which is attached to the front and rear edges of the bottom frame 12 so as to be capable of being turned upside down. Wife plates 13 and 13 for forming upper and lower end surfaces, and right and left outer frame members 14 for forming the left and right side surfaces of the retaining wall block B by attaching the lower end edges to the left and right side edges of the bottom frame body 12 so as to be able to turn over. , 14 and a central outer frame 15 for forming the inner surfaces of the left and right retaining walls 2 and 2 and the center of the rear surface of the front wall 1.
3 has a core insertion hole 1 for forming the rebar insertion holes 3 and 3.
6, 16 are respectively formed on the upper, lower, left and right sides. 1
7, 18 are frame support shafts respectively, 30 is an upright biasing spring, 3
1, 32 and 33 are connection fittings, respectively.

As shown in FIGS. 4 to 8, the core 11 is inserted into the rubber tubular body 20 and the rubber tubular body 20, and the rubber tubular body 20 is inserted into the reinforcing bar insertion hole. A foldable core body 21 that is formed and held in an inner shape, and a core assembly holder 22 that is inserted into the core body 21 and holds the core body 21 in an assembled state for forming an inner surface of a rebar insertion hole. It consists of.

As shown in FIG. 4 to FIG. 8B, the rubber tubular body 20 has an outer diameter which becomes the same shape as the reinforcing bar insertion hole 3 in the expanded state, and a pair of front and rear end plates 13 and 13. The front and rear lengths are slightly longer than the gaps.

As shown in FIGS. 4 to 8C, the core body 21 is formed of first, second, third, and fourth media for forming each side of the substantially rectangular rebar insertion hole 3. As shown in FIG. Child body division forming pieces 21a, 21b, 21
c, 21d, the first core body divided forming piece 21a
Of the second core body divided forming piece 21b is rotatably connected to the other side edge of the second core body divided forming piece 21b and the third core body divided. The one side edge of the molded piece 21c is rotatably connected to the other side edge of the third core body divided forming piece 21c and the one side edge of the fourth core body divided formed piece 21d. The core body 21 is also formed so as to be slightly longer than the interval between the pair of front and rear end plates 13 and 13. 21e, 21f and 21g are connecting parts.

The core body 21 includes the first, second, third, and fourth core body divided forming pieces 21a, 21b, 21c, as described above.
21d, and each core body divided forming piece 21a, 21
One side edge of b, 21c, 21d is connected in series continuously through connecting portions 21e, 21f, 21g to be rotatably connected, and the assembled state for forming the inner surface of the through hole and the triangular cylindrical folding It is made to be able to expand and contract with the state. As shown in FIGS. 4 and 8 (a), when the core body 21 is inserted into the core insertion holes 16, 16 formed in the base plates 13, 13, the rubber cylindrical body 20 is inserted. Is inserted using a guide cylinder 23 for keeping the shape.

As shown in FIGS. 4 to 8D, the core assembly holder 22 has an air injection valve 22b attached to one end opening of a bottomed cylindrical holder body 22a. Air is further injected into the holder body 22a to form the core body 21 so as to be inflatable to an outer diameter that can be held in the assembled state for forming the inner surface of the rebar insertion hole, and a pair of front and rear end plates 13, 13
The front and rear lengths are slightly longer than the gaps.

Next, a method of manufacturing the retaining wall block B using the mold A according to the present invention configured as described above will be described.
This will be partially described with reference to FIG.

Wife plates 13 and 13 and left and right outer frame bodies of the formwork body 10
With the 14 and 14 standing up, the wife plates 13 and 13 and the left and right outer frames
14 and 14 are connected to each other by connecting metal fittings 31 and 32, and the center outer frame 15 is inserted into the center between the front and rear end plates 13 and 13,
The central outer frame body 15 and the end plates 13, 13 are connected to each other by a connection fitting 33.

As shown in FIG. 8A, a rubber cylindrical body is provided.
The guide tube 23 is inserted into the inside 20. The guide tube 23 is inserted into the core insertion holes 16, 16 formed in the front and rear wives 13, 13 so as to penetrate in a transversely penetrating state.

As shown in FIG. 8B, while the core body 21 is inserted into the rubber tubular body 20 held by the guide barrel 23 from one end thereof, the other portion of the rubber tubular body 20 is inserted. Push out only the guide tube 23 from the end side.

At this time, as shown in FIG. 6, the core body 21 is divided into first, second, third, and fourth core body divided forming bodies 21a, 21.
b, 21c, 21d are inserted into the rubber tubular body 20 in a folded state in which the connecting parts 21e, 21f, 21g are bent into a triangular tubular shape, and folded into the rubber tubular body 20. Place in the state.

As shown in FIG. 8C, the core assembly holder 22 is inserted into the core body 21 in the folded state, and FIG.
8 (e), air is injected into the holder main body 22a from the air injection valve 22b as shown in FIG.
By expanding the holder body 22a, the core body 21 is held in the assembled state for forming the inner surface of the rebar insertion hole as shown in FIG.

As shown in FIGS. 1 to 3, concrete is poured from the upper end opening 25 of the formwork A assembled as described above, and after curing the concrete, the mold is subjected to a procedure opposite to the above-mentioned assembling procedure. The frame A is dismantled and the retaining wall block B is released.

At this time, the core assembly holder 22 is easily pulled out of the core body 21 by bleeding the air in the holder body 22a from the air injection valve 22b and contracting the holder body 22a. be able to.

The core body 21 is also provided with a core assembly holder 22.
After being pulled out, it can be pulled out easily from the rubber tubular body 20 in a folded state.

Subsequently, the rubber tubular body 20 can also be easily pulled out by peeling it inward from the inner surface of the reinforcing bar insertion hole 3 of the retaining wall block B after curing.

Thereafter, as shown by the dashed line in FIG.
The connection between the main plates 13 and 13 and the central outer frame 15 is released, the central outer frame 15 is removed, and the main plates 13 and 13 and the left and right outer frames 14 and 1 are removed.
The retaining wall block B can be easily taken out by releasing the connection with 4 and making them fall down outward.

[0031]

According to the present invention, the following effects can be obtained.

In the first aspect of the present invention, the core body includes the first, second, third, and fourth core body divided forming pieces, and one end of each core body divided forming piece. The edges are connected in series and connected rotatably to make it freely expandable and contractible between an assembled state of a closed substantially rectangular tube for forming the inner surface of the through hole and a folded state of a triangular tube. The assembling holder allows the insertion of a bottomed cylindrical holder into the internal space of the tubular part of the core body folded into a triangular cylindrical shape, and injects air into one end opening of the holder main body. A valve is attached, air is injected into the holder body from the air injection valve, and the holder body is expanded, so that the core body is closed from the triangular cylindrical folded state to a substantially square cylindrical assembled state. And can be held in the same assembled state. In this manner, the core assembling operation and the disassembly / removal operation can be easily performed, and the through-hole can be reliably formed. At this time, the core body includes the first, second, third, and fourth core body division forming pieces, and one side edge of each core body division forming piece is continuously connected in series. It is rotatably connected and can be freely expanded and contracted between a closed substantially rectangular cylindrical assembly state for forming the inner surface of the through hole and a triangular cylindrical folded state. In addition to inserting the bottomed cylindrical holder main body into the space, the air is injected into the holder main body from an air injection valve attached to one end opening of the holder main body to expand the holder main body. As a result, the core body can be changed from the triangular cylindrical folded state to the assembled state for forming the inner surface of the through hole, and can be held in the same assembled state. Can be. In addition, in the folding operation of the core body, the triangular cylinder can be easily folded by simply discharging the air from the air injection valve of the holder body and contracting the holder body. Then, the work of inserting and removing the holder main body from the core body in the triangular cylindrical folded state can be easily performed.

According to the second aspect of the present invention, the guide cylinder is inserted into the rubber cylinder, and the rubber cylinder is shaped by the guide cylinder. The body is inserted into the core insertion hole formed in the mold body via the guide cylinder, and the core body folded from one end side is inserted into the rubber cylindrical body retained by the guide cylinder. Meanwhile, the guide cylinder is pushed out from the other end side of the rubber cylindrical body.
In this way, since the rubber tubular body is retained by the guide cylinder, the rubber tubular body can be easily inserted into the core insertion hole of the mold body, and the core can be inserted. The core main body folded in a triangular cylindrical shape can be easily inserted from one end side into the rubber cylindrical body held by the guide cylinder in the hole. At this time, the guide cylinder holding the rubber tubular body, as the core body folded into a triangular tubular shape is inserted from one end side of the rubber tubular body, is inserted into the rubber tubular body. Can be pushed out from the other end of the rubber tubular body, and the work of replacing the guide cylinder in the rubber tubular body with the core body folded into a triangular tubular shape can be performed smoothly. It can be performed reliably.

[Brief description of the drawings]

FIG. 1 is an explanatory front view of a mold according to the present invention.

FIG. 2 is an explanatory plan view of the same mold frame.

FIG. 3 is an explanatory side view of the same formwork.

FIG. 4 is a diagram illustrating the configuration of a core.

FIG. 5 is an explanatory perspective view of a core.

FIG. 6 is a front view of the core body in a folded and inserted state.

FIG. 7 is an explanatory cross-sectional view showing a state in which a core is attached.

FIG. 8 is an explanatory view of assembling a core.

FIG. 9 is a perspective view of a retaining wall block formed by the mold according to the present invention.

[Explanation of symbols]

 A Formwork B Retaining wall block 1 Front wall 2 Buttwall 3 Reinforcement insertion hole 10 Formwork body 11 Core 20 Rubber tubular body 21 Core body 22 Core assembly holder

Claims (2)

(57) [Claims] And 1. A mold body for forming the outer shape of the concrete blocks (10), and a core for forming the through-holes, such as steel bar insertion holes in the concrete blocks (11) equipped
Then, the core (11) is a rubber tubular body (20) and the rubber tubular body (20).
Foldable core body (21), which is inserted into and holds the rubber tubular body (20) in the shape of the inner surface of the through hole, and the core body (21)
And inserted into, the core assembly retainer (22) for holding the core body (21) in the assembled condition of the through hole inner surface forming a concentrated having a
In the form of the reed block, the core body (21) is divided into first , second , third, and fourth core body divided forms.
Each of the core bodies has a piece (21a, 21b, 21c, 21d).
One side edge of the divided forming pieces (21a, 21b, 21c, 21d) is connected in series.
And connected rotatably to form the inner surface of the through hole.
Assembled state of closed substantially quadrangular cylinder and folded state of triangular cylinder
The core assembly holder (22) is a core body (2
In the internal space of the cylindrical part of (1), a cylindrical holder with a bottom (2
2a) can be inserted, and one end opening of the holder body (22a)
Attach the air injection valve (22b) to the
b) Inject air into the holder body (22a) from
By expanding the main body (22a), the core body (21) is
The assembled state of a substantially square cylindrical shape closed from the folded state of the square cylindrical shape
A concrete block formwork characterized in that the concrete block can be held in the same assembled state . 2. A guide cylinder (23) is inserted into a rubber cylinder (20).
And the rubber cylindrical body (20) is shaped by the guide cylinder (23).
Then, in the same shape-retained state, the rubber tubular body (20)
Through the core insertion hole (16) formed in the formwork body (10)
And the rubber tubular body (20) retained by the same guide barrel (23)
Insert the folded core body (21) from one end
While the other end of the rubber tubular body (20), the guide barrel (23)
The concrete block formwork according to claim 1, wherein the concrete block is extruded .