JPH0614968Y2 - Concrete panel pipeline structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a concrete panel duct structure, more specifically, a PC that is manufactured in advance in a factory and constitutes a structural member such as a wall surface or floor surface of a building. In a concrete panel such as a board (prestressed concrete board), the present invention relates to a structure of a conduit used for a conduit for electric wiring and the like.

[Conventional technology]

When constructing a structural member of a building with a concrete panel, it is common practice to embed electrical wiring in the concrete panel. In this case, a conduit for electrical wiring is embedded in the concrete panel beforehand, and after laying the concrete panel, the conduits embedded in each concrete panel are sequentially connected by separately prepared conduits, The pipe network is constructed.

FIG. 7 shows a conduit structure of a conduit in a conventional concrete panel. Inside the concrete panel P, the electric conduit E embedded at the stage of manufacturing the concrete panel P passes. An embedded joint C is attached to the end of the conduit tube P. A plurality of concrete panels P can be provided by connecting the embedded joints C of the concrete panels P that are laid adjacent to each other with another short connecting conduit e.
It is possible to build a conduit for connecting electric wires. In the figure, a cutout recess H is formed at the side end of the concrete panel P at the mounting location of the recessed joint C, and the recessed joint H is installed at the rear end surface of this cutout recess H. The notch recess H is provided to secure a space for connecting the connecting electric wire tube e to the embedded joint C between the concrete panels P.

Since the gap between the concrete panels P is usually filled by pouring concrete or mortar, the notch recess H
Concrete is also buried in the concrete panel P
The connecting conduit e between is embedded in the concrete structure.

In order to manufacture the concrete panel P in which the electric conduit E and the embedded joint c are used, which has been used above, the above-mentioned internal structure is attached to the mold for molding the concrete panel P.

FIG. 8 shows a conventional method for manufacturing a concrete panel P, in which a base member B corresponding to the shape of the cutout recess H and an embedded joint C are attached to the surface of a form M made of steel or the like. The fixed jig J is attached and fixed with a bolt b or the like. The conduit E is connected to the embedded joint C. If concrete is poured into the inside of such a form M and hardened,
Notch recess H at the side end of the molded concrete panel P
Is formed and the embedded joint C is opened in the rear end surface of the recess H, and the conduit E is embedded in the concrete panel P.

[Problems to be solved by the device]

However, in the conventional conduit structure of the concrete panel as described above, there is a problem that it is difficult to attach the connecting electric conduit tube e that connects the concrete panels P to each other.

This is because it is difficult to perform the work of connecting the connecting conduit tube e to the embedded joint C because there are only small gaps between the concrete panels P when they are laid. Therefore, as described above, the cutout recesses H are provided at the side end portions of the concrete panel P in order to secure a space for connection work, but the conventional cutout recesses H do not improve workability so much. After all, it was difficult to work.

If the notch recesses H are made wider, the connecting work becomes relatively easy to perform, but then, after the connection of the connecting electric conduit tube e, the notch recesses H of the concrete panel P will be filled with concrete or mortar cast on site. In addition, a large amount of concrete material is required. Further, if the notch recess H becomes too large, there is a risk of structurally weakening it or affecting the function and quality performance as a structural member, so the notch recess H cannot be made too wide.

Further, in the conventional structure, the connecting conduit tube e made of a steel tube or the like having a length substantially the same as the distance between the embedded joints C on both sides is provided.
Is required to be inserted into the notch recess H to connect both ends of the connecting conduit tube e to the embedded joints C and C, respectively. Since it is difficult to tilt or move in the axial direction, workability was extremely poor.

Next, in the above-described conventional method for manufacturing the concrete panel P, the work of attaching the base member B and the jig J to the form M with the bolt b was troublesome. If the base member B or the jig J moves or deforms when the concrete is poured into the form M, the positions of the conduit E and the embedded joint C are displaced, or the concrete intrudes into the interior through the gap. Therefore, as described above, the base member B and the jig J are attached to the form M.
It had to be firmly attached to the, which was a very time-consuming task. Also, the base member B and the jig J are
When the concrete panel P is molded, it becomes unnecessary, so
Since it was disposable as a consumable item, there was a problem that the manufacturing cost was high.

Furthermore, in the conventional concrete panel, after manufacturing the concrete panel P, during transportation or storage to the construction site, dust, water or other foreign matter enters the conduit tube E through the opening of the embedded joint C, The opening of the embedded joint C is covered with a dustproof cap so as not to hinder the entry work of the electric wiring. It was troublesome to attach the dustproof caps one by one, which was also a cause of increasing the cost.

In addition, the above-mentioned problem is also a problem in the conduit structure of the concrete panel in which various conduits other than the conduit for passing the electrical wiring are embedded.

Therefore, the problem of the present invention is to solve the problems in the conventional pipeline structure of the concrete panel as described above, and the connection work of the pipeline between the concrete panels can be easily and surely performed, and the whole construction at the construction site can be performed. (EN) It is intended to provide a conduit structure for a concrete panel, which not only enhances workability but also facilitates manufacturing of the concrete panel and reduces manufacturing and construction costs.

[Means for Solving the Problems]

A conduit structure for a concrete panel according to the present invention, which solves the above-mentioned problems, is an embedded joint that is connected to a conduit member embedded in a concrete panel and opens at an end face of the concrete panel, and an embedded joint for a different concrete panel. In a conduit structure of a concrete panel having a connecting pipe for connecting between, the connecting pipe is a flexible connecting pipe having elasticity and flexibility, and is provided with a mounting cap capable of closing the opening of the embedded joint. , The embedded joint is provided with a connection portion capable of selectively connecting both the mounting cap and the flexible connecting pipe, and the mounting cap is connected to the embedded joint and the embedded joint. It is equipped with a tubular part that can be inserted into the inside of the pipe line member and that can be fitted with a mounting pin that is mounted on the concrete panel manufacturing formwork, and the tubular part of the mounting cap is fitted to the mounting pin. , With the embedded joint connected to the mounting cap and the conduit member connected to the embedded joint, the mounting pin can be pressed into the conduit member through the tubular portion of the mounting cap. There is.

The basic shape and structure of the concrete panel are the same as those used for ordinary building concrete panels. As the duct member, a rigid pipe such as a steel pipe, a conduit such as a flexible conduit, or a conduit member embedded in an ordinary concrete panel can be used.

The embedded joint is made of synthetic resin, metal, or the like, and has a connecting structure such as a fitting hole for a conduit member that is connectable to the conduit member at one end, and the connecting portion provided at the other end is made of concrete. It has a structure that can be connected with either a flexible connecting pipe that connects between panels or a mounting cap. That is, either the flexible connecting tube or the mounting cap can be selectively attached to the embedded joint as required. The specific structure of the connecting portion is such that the connecting piece is connected and fixed only by fitting or pressing with each other by a locking piece or a locking projection that operates elastically, or that is fixed by rotating after fitting. , The connection structure in the ordinary pipe joint can be used freely.

The embedded joint is arranged so as to open to the side end surface of the concrete panel, but it is not necessary to provide a notched recess in the concrete panel and to arrange the embedded joint on the back end surface as in the conventional case, and it is not necessary to use a thick plate. The embedded joint may be opened directly on the side end surface of the concrete panel.

The flexible connecting tube is made of a synthetic resin molded product or a combination of a large number of small metal pieces and is connected to the flexible connecting tube. Part of it can be expanded or contracted, or it can be bent and bent. Specifically, a known structure of a bellows tube or a flexible electric wire tube is used. Both ends of the flexible connecting tube are provided with connecting portions for connecting to the embedded joint.
The structure of the connection part is determined according to the structure of the connection part of the embedded joint.

The mounting cap is made of flexible or elastically deformable synthetic resin, rubber, or the like, has a shape capable of closing the opening of the embedded joint, and is provided with a connection portion for connecting to the connection portion of the embedded joint. ing. The connecting portion of the mounting cap may have the same structure as the connecting portion of the flexible connecting tube described above. However, the connecting portions of the flexible connecting tube and the mounting cap may have different structures as long as they can be connected to the connecting portions of the embedded joint.

The mounting cap includes a tubular portion that can be inserted into the inner surface of the conduit member connected to the embedded joint. The outer diameter of the tubular portion is set to the same extent as the inner diameter of the conduit member. The inner shape of the tubular part, that is, the hole shape on the back of the tubular part that is recessed when viewed from the side opposite to the connection part to the embedded joint, can be fitted with the mounting pin installed on the concrete panel manufacturing formwork It has become.

The mounting pins are made of metal or synthetic resin, and are attached so that they project from the surface of the mold used to mold and manufacture concrete panels toward the inside of the mold, and when pouring concrete into the mold. Then, the mounting cap, the embedded joint, and the conduit member are mounted and fixed to the mounting pin. To fix the mounting pin to the form,
Bolts, welds and other conventional attachment means for structural parts are used. The mounting pins may be fixed to the formwork, or may be detachable from the formwork and attached to the mounting caps, embedded joints, and conduit members arranged on the surface of the formwork. Insert the mounting pin from the back side of the through the through hole penetratingly installed in the form, fit the mounting pin to the tubular part of the mounting cap, and fix the mounting cap etc. to the mounting pin. You may stay.

The outer diameter of the mounting pin is thicker than the inner diameter of the tubular portion of the mounting cap. When the tubular portion of the mounting cap is fitted into the mounting pin, the outer diameter of the tubular portion of the mounting cap becomes larger. Is transformed into. Therefore, in the state where the embedded joint is connected to the mounting cap and the conduit member is connected to the embedded joint, the mounting cap deformed by a larger amount than the inner diameter of the conduit member is pressed against the inner surface of the conduit member. That is, the mounting pin is press-fitted into the conduit member via the tubular portion of the mounting cap.

[Action]

First, a concrete panel manufacturing process will be described.

When the conduit member is connected to one end of the embedded joint and the mounting cap is connected to the connecting portion of the other end, the tubular portion of the mounting cap is inserted deep into the embedded joint and inserted into the conduit member. .
The embedded joint and the mounting cap are also attached to the other end of the conduit member. In this state, dust and the like cannot enter the inside of the pipe member or the embedded joint, so that the inside of the pipe member can be well sealed during the manufacturing process of the concrete panel.
However, the adhesion between the connecting portion of the pipe member and the embedded joint is not perfect, and if pressure is applied when the concrete is poured, the concrete may invade inside.

When the mounting cap is fitted and attached to the mounting pin protruding to the surface of the form, the mounting pin is pressed into the inside of the conduit member through the tubular portion of the mounting cap, so the conduit member is pressed toward the embedded joint side. It will be strongly adhered. As a result, when concrete is poured, the problem that concrete invades into the interior from the connecting portion between the pipe member and the embedded joint is solved.

The molded concrete panel is completed as a product through a curing process, a mold releasing process, a finishing process, etc. after molding. In the mold removing step, the molded concrete panel is removed from the mold, and the mounting pin is pulled out from the tubular portion of the mounting cap. Then, the pressing action of the mounting pin on the embedded joint of the pipeline member disappears, but at this stage, since concrete is already solidified, concrete is not filled inside the pipeline member through the gap between the pipeline member and the embedded joint. There is no need to worry about intrusion.

Finished concrete panel products are either shipped for temporary construction or stored temporarily. During this time, since the opening of the embedded joint is closed by the mounting cap, it is possible to reliably prevent dust and foreign matter from entering the inside of the conduit member from the outside.

To construct a concrete panel at a construction site, lay the concrete panel in place, remove the mounting cap that closes the opening of the embedded joint, and then connect the embedded joints of the adjacent concrete panels to each other with flexibility. Connect with a connecting pipe. The flexible connecting pipe may be connected to the connecting part of the embedded joint at its connecting portion, and at the time of connection work, if necessary, the flexible connecting pipe may be expanded or contracted or bent to bend. Even if the gap between the concrete panels is narrow, the connection work can be done easily. Specifically, once the flexible connecting tube is once compressed, it is inserted between the facing embedded joints, and then extended until both ends reach the connection position with the embedded joint, so that the flexible connecting tube can be installed very easily. It can be done easily. In addition, if the concrete panel is temporarily placed with a wide gap and the flexible connecting pipe is extended and connected to the embedded joints on both sides, it is possible to lay the concrete panel in place. The flexible connecting tube is contracted and placed in the gap between the concrete panels, which facilitates connection work of the flexible connecting tube. Even if the parallelism of the concrete panels on both sides is poor or the position of the embedded joint is misaligned,
Since it can be absorbed by expansion and contraction or bending of the flexible connecting tube, there will be no connection failure or inability to connect. Even embedded joints oriented in directions orthogonal to each other can be connected by bending the flexible connecting pipe into a quadrant shape.

〔Example〕

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

1 and 2 show the manufacturing process of the concrete panel,
The pipe structure portion is shown.

As shown in FIG. 1, one end of a conduit member 10 to be embedded in a concrete panel is fitted and connected to a fitting connection portion 22 provided at one end of a generally cylindrical embedded joint 20 made of a synthetic resin molded product. It A flange portion 21 extending to the outer periphery is provided at the other end of the embedded joint 20, and a locking portion 24 protruding toward the center is formed on the inner end surface of the flange portion 21.

A mounting cap 30 is connected to the end surface of the embedded joint 20. The mounting cap 30, as shown in detail in FIG.
On one surface of the disk-shaped flange portion 38, the cylindrical outer peripheral tube 34
And a peripheral locking protrusion 36 is provided on the outer surface of the outer peripheral tube 34. At the center of the outer peripheral tube 34, a cylindrical portion 32 having a bottomed cylindrical shape higher than the outer peripheral tube 34 is formed. In the mounting cap 30 inserted into one end of the embedded joint 20, the tubular portion 32 is inserted into the inside of the conduit member 10, and the outer peripheral tube 34
Is inserted inside the flange portion 21, and the locking projection 36 is engaged with the locking portion 24 of the embedded joint 20 to be connected and fixed to the embedded joint 20.

The rear surface of the flange portion 38 of the mounting cap 30 is arranged so as to abut against the inner surface of the mold 50 for manufacturing a concrete panel, and the mounting pin 40 inserted from the rear surface of the mold 50 through the through hole 52 of the mold 50. Tapered tip 42 of
Is inserted into the hole 33 formed on the back side of the tubular portion 32 of the mounting cap 30. The mounting pin 40 has a tip portion 42 formed to be thicker than the inner diameter of the hole 33, and by operating a shaft portion 44 projecting to the rear surface side of the mold 50, the mounting pin 40 is inserted into the hole 33 of the cylindrical portion 32 of the mounting cap 30. It can be removed and inserted. When the tip portion 42 of the mounting pin 40 is inserted into the hole 33 of the tubular portion 32 of the mounting cap 30, the tip portion 42 having a diameter larger than the diameter of the hole 33 pushes the tubular portion 3 of the mounting cap 30.
2 tends to swell toward the outer peripheral side, and the pipe member 10 in which the tubular portion 32 is inserted is strongly pressed against the inner surface of the fitting connection portion 22 of the embedded joint 20.

A concrete material is poured into the mold 50 set in the above state to form a concrete panel. Once the concrete panel is molded, the formwork 50 and mounting pins 40 are removed.

As shown in FIG. 2, a molded concrete panel 6
In FIG. 0, the conduit tube 10 is embedded inside, the embedded joint 20 is arranged on the end surface of the concrete panel 60, and the opening of the embedded joint 20 is closed by the mounting cap 30. In this state, a finishing process of the concrete panel 60 and other post-processes are performed to complete the concrete panel 60 product. Also, the completed concrete panel 60 is transported and stored.

When constructing a concrete panel 60 on a construction site,
As shown in FIG. 3, from the embedded joint 20 to the mounting cap 3
Remove 0. The mounting cap 30 can be removed from the embedded joint 20 by elastically deforming the hole 32 and the flange portion 38 on the back surface of the tubular portion 32. The mounting cap 30 may be removed after the concrete panel 60 has been laid on a predetermined construction site, and even if the gap between the concrete panels 60 is narrow, it can be easily taken out by elastically deforming the mounting cap 30. it can.

Next, as shown in FIG. 4, in a state where the embedded joints 20, 20 of the adjacent concrete panels 60, 60 face each other, the flexible connecting pipe 70 is inserted in the middle. The flexible connecting tube 70 has a bellows portion 7 having elasticity and flexibility in the center.
2, a hollow disk-shaped flange portion 74 is provided at both ends of the bellows portion 72, and a tip end of the flange portion 74 is provided with a locking portion 76 that protrudes in a wedge shape and is circumferentially arranged. . The flexible connecting tube 70 is inserted between the left and right embedded joints 20 in a state where the bellows portion 72 is contracted.

As shown in FIG. 5, when the locking portion 76 of the flexible connecting tube 70 is elastically deformed and is inserted into the locking portion 24 disposed in the opening of the embedded joint 20, the flange portion can be formed. 74 abuts the flange portion 21 of the embedded joint 20, and the locking portion 24 and the locking portion 76 engage with each other, so that the flexible connecting pipe 70 is attached to the embedded joint 20.
Are connected and fixed. The flexible connecting tube 70 has both ends connected and fixed to the embedded joint 20. At this time, the contracted bellows portion 72 may be extended so that the locking portions 76, 76 at both ends reach the respective embedded joints 20, 20. Therefore, when connecting the embedded joints 20, 20 of the adjacent concrete panels 60, 60 with the flexible connecting pipe 70, the bellows part 7 is provided between the concrete panels 60, 60.
It suffices if there is a gap into which the flexible connecting tube 70 in the contracted state of 2 can be inserted.

As described above, the embedded joints 20 and 20 are connected to the flexible connecting pipe 7.
After connecting with 0, if a mortar or the like is placed in the gap between the concrete panels 60, and the flexible connecting pipe 70 is embedded, a pipe line structure is built in the building structure.

The flexible connecting pipe 70 used in the above embodiment is the embedded joint 20,
The bellows of the flexible connecting tube 70 not only when the 20 are arranged facing each other, but also when the embedded joints 20 and 20 are oriented in directions orthogonal to each other as shown in FIG. It is possible to make the connection by bending the portion 72 in an arc shape.

[Effect of device]

According to the conduit structure of the concrete panel according to the present invention described above, the flexible connecting pipe having elasticity and flexibility is used as the connecting pipe for connecting the embedded joints to each other. The work of connecting the pipelines is extremely easy. That is, if the flexible connecting tube is inserted into the gap of the concrete panel in a contracted state, it can be easily inserted into a narrow gap, and even if the position or posture of the embedded joint is displaced, it is absorbed by the deformation of the flexible connecting tube. For example, the flexible connecting pipe can be freely expanded and contracted or bent to bend the connecting pipe easily and efficiently.

Next, the provision of the mounting cap connectable to the recessed joint facilitates the molding and production of the concrete panel. That is, in the manufacturing process of the concrete panel, with the tubular portion of the mounting cap inserted into the inside of the conduit member connected to the embedded joint, the mounting pin attached to the formwork is attached to the tubular portion of the mounting cap. If inserted, the mounting pin is press-fitted into the conduit member via the mounting cap, and the conduit member can be brought into close contact with the embedded joint. as a result,
Even if pressure is applied during concrete injection, concrete does not enter the interior through the gap between the pipe member and the embedded joint. Further, since mounting and removal of the embedded joint and the like on the formwork are performed only by inserting and removing the mounting pins, the work of assembling the formwork or removing the form of the manufactured concrete panel becomes extremely simple. Since the mounting pin does not come into direct contact with the concrete material, it can be repeatedly used as it is, and the manufacturing cost can be reduced.

Furthermore, the mounting cap can also function as a dustproof cap when transporting and storing the concrete panel, and can reliably prevent dust and foreign matter from entering the inside of the conduit member. That is, the mounting cap fulfills both functions of the above-mentioned member for producing a concrete panel and the dustproof cap, so that it is not necessary to attach the dustproof cap each time, and the manufacturing cost can be reduced.

[Brief description of drawings]

1 and 3 are cross-sectional views sequentially showing the manufacturing process of a concrete reed panel having a concrete panel conduit structure according to an embodiment of the present invention, and FIGS. 3 to 5 are conduits between concrete panels. And FIG. 6 is a sectional view showing another state of use, FIG. 7 is a perspective view showing a conventional pipe line structure, and FIG. 8 is an exploded perspective view showing a structure of a mold. Is. 10 ... Pipe member, 20 ... Embedded joint, 22 ... Fitting connection part, 24 ... Locking part, 30 ... Mounting cap, 32 ...
… Cylindrical part, 36 …… Locking protrusion, 40 …… Mounting pin, 50
...... Formwork, 60 …… Concrete panel, 70 …… Flexible connecting pipe, 76 …… Locking part

Claims (1)

[Scope of utility model registration request] 1. A concrete panel having an embedded joint connected to a conduit member embedded in the concrete panel and opening at an end face of the concrete panel, and a connecting pipe for connecting the embedded joints of different concrete panels. In the pipe line structure, the connecting pipe is a flexible connecting pipe that has elasticity and flexibility, and is equipped with a mounting cap that can close the opening of the embedded joint. It has a connection part that can selectively connect both of the pipes, and the mounting cap can be inserted into the connection part that can be connected to the embedded joint and the conduit member connected to the embedded joint, and the concrete panel It is equipped with a cylindrical part that can fit the mounting pin to be attached to the manufacturing form of, the cylindrical part of the mounting cap is fitted to the mounting pin, the embedded joint is connected to the mounting cap, and it is embedded. Pipe member for joint In the connected state, the pipe structure of concrete panels, characterized in that the mounting pins are adapted to be pressed into the interior of the conduit member through the tubular portion of the mounting cap.