JP3388302B2 - Recess forming tool for bent piping and bent piping device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recess for forming a recess for bending pipe in a precast concrete wall for bending a pipe in a two-layer structure wall of a precast concrete wall and a cast concrete wall. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forming tool and a bending piping device installed on a precast concrete wall for bending a pipe in a two-layer structure wall including a precast concrete wall and a cast concrete wall.

[0002]

2. Description of the Related Art Conventionally, the walls of buildings such as slabs have not been constructed by placing concrete, but at the factory or on-site, a concrete wall (precast concrete wall) with pipes embedded inside has been prepared in advance. The so-called PC method of assembling this on-site is performed.
This PC construction method does not require the installation of the formwork and the bar arrangement work that is required when pouring and constructing concrete at the site,
In addition, there is no need for work such as fixing concrete embeddings used for piping on the site to the formwork, which has the advantage that construction can be performed easily. On the other hand, however, the PC method has problems that the piping cannot be changed or modified at the site, and that transportation to the site is troublesome.

Therefore, recently, a construction method using a two-layer structure wall of a precast concrete wall and a cast concrete wall has been developed. This construction method is called the half-PC construction method, and as shown in FIG.
A pipe P1 of an appropriate length for the pipe connection port of the concrete buried object B
, And a precast concrete wall PC embedded with concrete is prepared with the end of the pipe P1 exposed. Next, this is installed in a construction site, the skeletal reinforcing bar S is arranged on it, the exposed pipe P1 is bent, and another pipe P2 is connected to this through the connecting tool C and piped. , Spinal rebar S
Further, by constructing a cast concrete wall RC by placing concrete so that the pipes P1 and P2 are embedded inside, a building wall is constructed by a two-layer structure wall of the precast concrete wall PC and the cast concrete wall RC. It is designed to do.

According to such a half-PC method, the precast concrete wall can be used as it is as a formwork, so that the work of installing the formwork is unnecessary, while the advantage of the PC method remains, and further, the change of piping on site or It has the advantage that it can be easily corrected and covers the drawbacks of the PC method.

However, in carrying out such a half-PC construction method, the thickness of the cast concrete wall becomes thin due to the thickness of the precast concrete wall, so that it is largely used when bending a pipe exposed upward from the precast concrete wall. It cannot be bent. For this reason, if the bending diameter of the pipe is reduced, it becomes difficult to carry out the work of passing the wire through the inside of the pipe, and the bent portion will buckle and the wire cannot be passed. On the other hand, if the bending diameter is increased so as to reach the surface of the cast concrete wall, the strength of the skeleton of the cast concrete wall becomes weak, which is not preferable.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object thereof is to provide a pipe in a two-layer structure wall of a precast concrete wall and a cast concrete wall. Without buckling
Also, without reducing the strength of the cast concrete wall,
An object of the present invention is to provide a recess forming tool and a bending piping device capable of bending piping.

[0007]

That is, as a means for solving the above-mentioned problems, the invention according to claim 1 is
"A recess forming tool for forming a recess for bending pipe in a precast concrete wall for bending a pipe in a two-layer structure wall of a precast concrete wall and a cast concrete wall, Rutotomoni formed into a square frame body shaped to be embedded so as to penetrate,
To connect the pipe to the recess that secures the space required for bending the pipe by the partition wall with the communication hole for the pipe
A nut for attaching the pipe connector of the above to the partition wall is accommodated.
The interior is divided into a recess and the space required for bent pipes is provided.
Part or all of the recess to secure it gradually expands
It is formed as a "recess forming tool for a bent pipe".

Further, the invention according to claim 2 is " bending of a pipe.
The recess to secure a space required for piping the recessing tool "according to claim 1, wherein for bending pipes, characterized in that a part thereof is formed by forming an enlarged gradually <br/> Next , Its content.

The invention according to claim 3 is the " partition wall ".
Is provided with a plurality of communication holes, and along the arrangement direction of the communication holes
The bent portion of the pipe to secure the space required for the pipe.
Portion is gradually expanded and the communication hole can be punched
It is blocked from the knock part and the knock part is punched out.
2. The buckle according to claim 1, wherein
The contents are " recess forming tool for curved piping ".

The invention according to claim 4 is a bending pipe apparatus installed on a precast concrete wall for bending a pipe in a two-layer structure wall of a precast concrete wall and a cast concrete wall, Rutotomoni formed into a square frame body shaped to be embedded so as to pass through the pre-cast concrete walls, partitions communicating hole is formed in the pipe
Attaching to the partition wall a recess that secures the space necessary for bending the pipe by the wall and a pipe connector for connecting the pipe.
The interior is partitioned into a recess that accommodates the nut
A part of the recess that secures the space necessary for bending the pipe
Is a recess forming tool, which is formed by gradually expanding the whole, and a tube.
The bent pipe device ", characterized in that consisting of being received within the recess to secure a space necessary the communication hole to the attached to tube connector for piping bent pipe, and its contents.

Furthermore, the invention according to claim 5 is that " the bending of the pipe is
The recess to secure a space required for music piping claim, characterized in that a part thereof is formed by <br/> gradually expanded 4
The content is "Bent piping device described".

Further, the invention according to claim 6 is that "the partition wall is
Is provided with a plurality of communication holes, along the arrangement direction of the communication holes,
The recess that secures the space required for the bent pipe is gradually expanded.
It is formed as a large size, and the communication hole is a knockable part that can be punched out.
And the knock part is punched out.
The bent pipe device according to claim 4, wherein the bent pipe device is formed.
" Oki " is the content.

In the invention described in claims 1 to 6 , the communication hole for piping is for communicating the piping inside the wall and the piping outside the wall, and is formed as an insertion hole for inserting the pipe. These include a port having a locking claw for locking the pipe, a port formed as a connection port for directly connecting the pipe, and a port formed as an attachment port for mounting the pipe connector. Further, the partition wall forming the communication hole for piping is not limited to the one in which the communication hole for piping has already been formed, and may be one that can be formed by being opened later.
Even if the partition wall is provided integrally inside the recess forming tool,
It may be attached separately.

[0014]

The recess forming tool according to the first aspect of the present invention ,
It is formed in the shape of a rectangular frame, and a part of it gradually expands.
Has been formed. The pipe to be piped has a rectangular frame-shaped recess.
The pipe is bent in the tool. As a result, it is possible to create a precast concrete wall in which sufficient space for bending the pipe is secured, and the partition wall forming the communication hole for the pipe allows the pipe to be directly connected to the communication hole or the pipe connection tool. It is possible to form a cast concrete wall on a precast concrete wall by connecting via a pipe and bending the pipe without reducing the bending diameter. or,
A recess for accommodating the nut is provided in the recess forming tool.
Therefore, conventional piping connections such as connectors and couplings
The various pipe connectors used in the
It is attached to the cut wall.

Further, in the recess forming tool according to the second aspect of the present invention, the recess that secures a space necessary for bending the pipe is
A part is gradually expanded and formed. The pipe to be piped is
The pipe is bent in the recess.

Further, in the recess forming tool according to the third aspect of the present invention, the partition wall is provided with a plurality of communicating holes, and the communicating holes are provided.
Secures the space required for bent pipes along the arrangement direction of
The recess for forming is gradually enlarged and formed. Should be plumbed
The plurality of pipes are bent and piped in the recess. or,
The communication hole for piping is blocked by the knockable knock part.
By punching out the knock part only where it is needed,
Form a communication hole, and connect a pipe directly to this or through a pipe connector.
And connect to bend the pipe without reducing the bend diameter.
Then, place concrete on the precast concrete wall.
It is possible to form a wall.

Further, in the recess forming tool according to the invention as defined in claim 4, the recess forming tool can secure a sufficient space for bending the pipe in the precast concrete wall, and further the recess can be formed. By connecting the pipe to the pipe connection port of the pipe connector that is housed in the facility and attached to the communication hole for piping, the pipe is bent without reducing the bending diameter, and it is struck on the precast concrete wall. A concrete wall can be formed. In this bent pipe apparatus, the pipe connection hole can be left as it is, and pipes of different diameters can be made to correspond to pipe connection ports.

The bent pipe apparatus according to the invention of claim 5 is the bent pipe apparatus according to claim 4.
The recess that secures the space required for the bent pipe is
A part is gradually expanded and formed. The pipe to be piped is
The pipe is bent in the recess.

Further, in the invention according to claim 6, the contract
In the bent piping device according to claim 4, a plurality of partition walls are provided.
A pipe is provided with a communication hole, and the pipe is bent along the arrangement direction of the communication hole.
The recess to secure the space required for piping gradually expanded
It is formed. Plural pipes to be piped should be placed in the recess.
It is bent and piped. Also, the communication hole for piping can be punched out.
Due to the configuration that is closed by a simple knock part,
The knock part is punched out to form a communication hole, and the pipe is
Connection or via a pipe fitting to reduce the bending diameter
Without bending the pipe without precast concrete
It has become possible to form a cast concrete wall on the
There is.

By using the recess forming tool and the bent pipe device, the bent portion of the pipe will not buckle and the work of passing the wire into the pipe will not be hindered. Bending piping can be performed without reducing the core strength.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the drawings. 1 to 3 show an embodiment of a recess forming tool according to the present invention, FIG. 1 is a perspective view thereof, FIG. 2 is a plan view thereof, and FIG. 3 is a pipe connecting device mounted to produce a precast concrete wall. It is sectional drawing which shows a state.

As shown in FIGS. 1 and 2, this recess forming tool 1 is made by combining bent thin steel plates and joining them to each other. A partition wall 13 is formed in a frame shape surrounded by 11, and has a recess and a partition wall 13 having a plurality of communication holes 14 for piping therein. The peripheral wall 11 of the recess forming tool 1 has a flange 12 for fixing the recess forming tool 1 to a formwork at the time of producing a precast concrete wall in the lower part thereof, and as shown in FIG. A boundary wall is formed to prevent the poured concrete from entering the inside of the recess forming tool 1 when the wall PC is manufactured. In addition, in order to cope with the case where the wall thickness of the precast concrete wall PC is different, it is preferable that the height of the peripheral wall 11 is formed to match the wall thickness of the thickest precast concrete wall. As a result, it can be commonly used for producing precast concrete walls having different wall thicknesses. The recess forming tool 1 may be manufactured by synthetic resin molding.

Inside the recess forming tool 1, a pipe connecting tool 2 which is attached to a communication hole 14 for piping provided in a partition wall 13 is accommodated, and is gradually expanded toward the opening at the upper part. The formed recess is formed. As shown in FIG. 10, this recess is for bending the pipe P connected to the pipe connection port 21 of the pipe connector 2 in the two-layer structure wall of the precast concrete wall PC and the cast concrete wall RC. Forms the space needed for. In addition, in the recess forming tool 1 of this embodiment, a part of the recess is formed so as to gradually expand toward the upper opening as a form for ensuring the space required for the bent pipe to a minimum. In the present invention, the recess is not limited to the one that is formed so as to be gradually expanded as long as it is a recess that secures a space necessary for bending the pipe.

Partition wall 1 provided inside the recess forming tool 1
3 is necessary as a partition for preventing the concrete from flowing out when the concrete is cast on site and the cast concrete wall RC (FIG. 10) is produced. or,
The partition wall 13 is formed with a communicating hole 14 for piping for communicating the pipe inside the wall and the pipe outside the wall. As in this embodiment, the pipe connecting tool 2 is held by using the communicating hole 14. A partition wall 13 is used to place the sheet. Such a partition wall 13
May be integrally formed with the peripheral wall 11 or may be attached separately.

As shown in FIG. 9, the communication hole 14 is closed by connecting the pipe P directly or through the pipe connecting tool 2 before the concrete wall for casting is formed. As shown in FIGS. 4 and 5, the communication hole 14 may be pre-closed by the knockable knock portion 15, so that the knock portion 15 may be punched only at a necessary portion and an opening may be formed later.

Since the precast concrete wall in which the recess forming tool 1 is embedded is manufactured according to the design in advance, the recess forming tool 1 also has various forms (FIGS. 12 to 23) to correspond to the design. ) Is used. Therefore, although it is premised that all communication holes for piping are used, there may be cases where communication holes that are not used are generated due to design changes. In such a case, the design change can be easily dealt with by using the recess forming tool 1 having the configuration shown in FIGS. 4 and 5. In addition, as shown in FIG. 5, the knock portion 15 has a notch formed at the peripheral edge of the communication hole 14,
It adopts a structure in which a part or all is joined by thin wall, and can be easily punched by a driver or the like.

To prepare a precast concrete wall using the recess forming tool 1 shown in FIG.
1. The flange 12 formed in the lower part is brought into contact with a formwork for producing a precast concrete wall, and fixed by tightening with bolts and nuts, nailing, or tape bonding. Then, concrete is poured and solidified, and then, as shown in FIG.
A precast concrete wall PC is prepared as shown in FIG. The pipe connector 2 is housed inside the recess forming tool 1 and is attached to the communication hole 14 provided in the partition wall 13. For mounting, the pipe connection port 21 provided at one end of the pipe connection tool 2 is turned up, the male screw portion 23 provided at the other end of the pipe connection tool 2 is inserted into the communication hole 14, and the nut 24 is attached to the male screw portion 23. It is attached by screwing and tightening. This makes it possible to produce a precast concrete wall PC for forming a cast concrete wall on site. The pipe connector 2 may be attached to the communication hole 14 when the recess forming tool 1 is fixed to the mold.

The recess forming tool of the present invention is not limited to the one in which the communication hole 14 for piping is formed as a mounting port for mounting the pipe connecting tool 2 as in the embodiment, but an insertion hole for inserting a pipe. It may be formed as, or may be formed as a connection port for directly connecting the pipe by forming a receiving port provided with a locking claw for locking the pipe. In the case of such a recess forming tool, as shown in FIG.
Is not attached, and there is no need for a space for accommodating the pipe connector 2 inside.

Further, the recess forming tool of the present invention is formed in the shape of a frame embedded to penetrate a precast concrete wall, and its shape is not limited to a rectangular parallelepiped or a rectangular parallelepiped.
It may be formed in a cylindrical shape, or may have another shape. Further, it is not limited to the form having an opening at the top as in the embodiment shown in FIG. 1, but may be one whose upper surface is closed by a closing body 16 as shown in FIG. 24, for example. This occlusion body 16 is removable,
It may be configured with a cap body by fitting, or may be configured with a plug such as styrofoam or cork,
Further, it may be formed integrally with the peripheral wall 11 and can be removed by punching. By providing such a closing body 16, as shown in FIG. 24, it is possible to reliably prevent the concrete from entering the inside of the recess forming tool 1 during the production of the precast concrete wall.

Further, the recess forming tool of the present invention may have a structure whose height can be adjusted. For example, as shown in FIG. 25, a movable part formed by forming a fixed-side forming tool 1 a formed by forming a female screw portion 17 on the inner surface of a recess formed in a cylindrical shape and a male screw portion 18 screwed to the female screw portion 17. The recess forming tool 1 including the side forming tool 1b may be configured so that the overall height can be adjusted by rotating the movable side forming tool 1a. With such a configuration, it is possible to easily cope with the production of precast concrete walls with different wall thicknesses.
The product can be made compact. The height is not limited to the screwed structure shown in the figure, and the structure may be such that the height can be adjusted by sliding, and the height can be adjusted by changing the distance between the fixed-side forming tool 1a and the movable-side forming tool 1b by screwing a screw. Good structure.

FIG. 6 and FIG. 7 show an embodiment of a bent piping device comprising a recess forming tool 1 and a tube connecting tool 2. The pipe connector 2 used here is the same as that shown in FIG. 3, and has a pipe connection port 21 at one end and a male screw portion 23 into which a nut 24 is screwed at the other end. The nut 24 is screwed into the male screw portion 23 inserted through the communication hole, and is tightened to be attached to the recess forming tool 1. A large number of locking claws 22 (FIG. 6) are provided in the tube connection port 21 for locking the tube inserted therein.
Is provided. In this bent piping device, the pipe connecting holes can be connected to pipes having different diameters while the pipe communicating holes are left unchanged.

The pipe connector 2 is not limited to the one that is attached to the recess forming tool 1 by screwing the nut 24 into the male screw portion 23 that is inserted into the communication hole and tightening it. It may be screwed with a screw or a screw.

Further, the recess forming tool 1 used in the bent pipe apparatus is formed such that the recess gradually expands toward the upper opening, and a space for ensuring the space required for the bent pipe is minimized. However, the present invention is not limited to this, as long as it has a recess that secures a space necessary for the bent pipe. Further, the recess forming tool 1 may be embodied with a structure in which the upper surface is closed by the closing body 16 as shown in FIG. 24 or a structure in which the height can be adjusted as shown in FIG.

As the pipe connector used in the recess forming tool and the bent pipe device of the present invention, various pipe connectors used for conventional pipe connections such as connectors and couplings can be used.

Next, an example of piping by the half PC method using a precast concrete wall using the recess forming tool 1 shown in FIG. 1 will be specifically described. First, as shown in FIG. 8, in a factory or the like, the pipe forming tool 2 is attached to the recess forming tool 1.
A precast concrete wall PC equipped with is prepared. Next, as shown in FIG. 9, at the site, a precast concrete wall PC is installed, and a skeletal reinforcing bar S is laid at a place where a concrete wall for casting is formed, while one end of a pipe P for bending piping is recessed. Pipe connector 2 attached to forming tool 1
It is connected to the pipe connection port 21 of. Then, the pipe P is bent using the space formed on the pipe connection port 21 by the recess forming tool 1. Next, as shown in FIG. 10, concrete is poured to form a cast concrete wall RC on the precast concrete wall PC. This makes it possible to embed a bent pipe in a desired state in a two-layer structure wall including a precast concrete wall and a cast concrete wall.

The pipe P used for the bent pipe is not limited to the corrugated pipe having flexibility, and as shown in FIG. 11, the strength against the pouring of concrete when forming the concrete wall RC for pouring is high. A pre-bent hard tube Pa having flexibility may be used.

[0037]

As described above, according to the present invention configured as described above, in the pipe construction method using the two-layer structure wall of the precast concrete wall and the cast concrete wall, the inside of the two-layer structure wall is The pipe can be bent in a desired state. Therefore, it is difficult to carry out the wiring work into the pipe, and the problem that the bent part buckles and the wire cannot be passed, and the bending part is embedded in the surface of the cast concrete wall, and It has the effect of not causing problems such as weakening.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a recess forming tool according to the present invention.

2 is a plan view of the recess forming tool shown in FIG. 1. FIG.

FIG. 3 is a cross-sectional view showing a state in which a precast concrete wall is produced using the recess forming tool shown in FIG.

FIG. 4 is a plan view showing another embodiment of the recess forming tool according to the present invention.

5 is a cross-sectional view taken along the line AA of FIG.

FIG. 6 is a plan view showing an embodiment of a bent piping device according to the present invention.

7 is a cross-sectional view of the device shown in FIG.

8 is a cross-sectional view showing a step in a piping construction example using the recess forming tool shown in FIG. 1. FIG.

9 is a cross-sectional view showing a step in a piping construction example using the recess forming tool shown in FIG. 1. FIG.

FIG. 10 is a cross-sectional view showing a step in a piping construction example using the recess forming tool shown in FIG. 1.

FIG. 11 is a sectional view showing a step of another piping construction example using the recess forming tool shown in FIG.

FIG. 12 is a perspective view showing another embodiment of the recess forming tool according to the present invention.

13 is a plan view of the recess forming tool shown in FIG. 12. FIG.

FIG. 14 is a perspective view showing another embodiment of the recess forming tool according to the present invention.

15 is a plan view of the recess forming tool shown in FIG. 14. FIG.

FIG. 16 is a perspective view showing another embodiment of the recess forming tool according to the present invention.

17 is a plan view of the recess forming tool shown in FIG. 16. FIG.

FIG. 18 is a perspective view showing another embodiment of the recess forming tool according to the present invention.

FIG. 19 is a plan view of the recess forming tool shown in FIG. 18.

FIG. 20 is a perspective view showing another embodiment of the recess forming tool according to the present invention.

FIG. 21 is a plan view of the recess forming tool shown in FIG. 20.

FIG. 22 is a perspective view showing another embodiment of the recess forming tool according to the present invention.

23 is a plan view of the recess forming tool shown in FIG. 22. FIG.

FIG. 24 is a cross-sectional view showing another example of the recess forming tool according to the present invention and showing a state in which a precast concrete wall is produced.

FIG. 25 is a sectional view showing another embodiment of the recess forming tool according to the present invention.

[Fig. 26] Fig. 26 is a cross-sectional view showing a conventional piping construction state by a two-layer structure wall of a precast concrete wall and a cast concrete wall.

[Explanation of symbols]

1 Recess forming tool 2 pipe connection 11 Perimeter wall 13 partition walls 14 Communication hole for piping 15 knock part PC precast concrete wall RC cast concrete wall P tube

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Claims (6)

(57) [Claims] 1. A recess forming tool for forming a recess for bending pipe in a precast concrete wall for bending a pipe in a two-layer structure wall of a precast concrete wall and a cast concrete wall, Those who buried so as to penetrate the precast concrete wall
It is formed in the shape frame body shaped Rutotomoni, communication hole is formed for the pipe
The partition wall is provided with a recess that secures a space necessary for bending the pipe by the formed partition wall, and a pipe connector for connecting the pipe.
The interior is partitioned into a recess that accommodates the nut to be attached to
The recess that secures the space required for the bent pipe is
A part or the whole of the above is gradually enlarged to form a recess forming tool for a bent pipe. 2. Before securing a space required for bent pipes
Serial recess, recess formers for bending pipes according to claim 1 Symbol mounting, characterized in that a part thereof is formed by formed by gradually expanding. 3. The partition wall is provided with a plurality of communication holes,
Space required for bending pipes along the direction of communication holes
The recess for ensuring the
When the communication hole is closed by a knockable knock part
In both cases, the knock portion is formed by punching.
The recess forming tool for a bent pipe according to claim 1, which is a characteristic. 4. A bending pipe apparatus installed on a precast concrete wall for bending a pipe in a two-layer structure wall consisting of a precast concrete wall and a cast concrete wall, which is embedded to penetrate the precast concrete wall. If that
It is formed in the shape frame body shaped Rutotomoni, communication hole is formed for the pipe
The partition wall is provided with a recess that secures a space necessary for bending the pipe by the formed partition wall, and a pipe connector for connecting the pipe.
The interior is partitioned into a recess that accommodates the nut to be attached to
The recess that secures the space required for the bent pipe is
Recessed part formed by gradually expanding part or all of
Ingredients and, bent pipe apparatus characterized by comprising a said communication hole to the attached to tube connector for piping is accommodated in the recess to secure a space required for bending the pipe of the tube. 5. Before securing a space required for bent pipes
Serial recess, bent pipe according to claim 4, wherein the part thereof is formed by gradually expanding. 6. The partition wall is provided with a plurality of communication holes,
Necessary for bending the pipe along the direction of the communication hole.
The recess that secures the space is formed by gradually expanding,
The hole is closed by a knockable knock part,
The knocking portion is formed by punching.
The bent piping device according to claim 4.