JP2000120922A - Guide member for piping of conduit pipe and its piping method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a guide member for piping a conduit pipe, delivered in a desired direction, easily laid in a given position by improving the straight advance properties of the conduit pipe when the conduit pipe is piped at the internal part of a concrete wall and to provided a method for piping of a conduit pipe using the guide member. SOLUTION: A guide member G for piping of a conduit pipe comprises a head part 1 provided on the tip side with a climbing over arcuate part 11; a coupling part 2 to a conduit pipe P arranged on the base end side; and a connection part 3 to a rod member R inserted in the conduit pipe P. After the rod member R is coupled and connected the connection part 3 of a guide member G for piping of a conduit pipe, the rod member R is inserted through the tip opening part of the conduit pipe P in a pipe, and simultaneously, the coupling part 2 is coupled to the opening part of the conduit pipe P. With the guide member G forming a tip part, the conduit pipe P is extruded and piped between the upper and lower built-in reinforcing bars Cu and Cd of a reinforced concrete wall before placing of concrete.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible plastic made of synthetic resin as a cable protection tube for conducting wires, telephone lines and other communication lines for concealing piping inside reinforced concrete walls of buildings and structures. The present invention relates to a conduit pipe guide member used when slab piping or a built-in corrugated pipe, commonly known as a resin conduit pipe, is provided, and a conduit pipe piping method.

[0002]

2. Description of the Related Art Corrugated flexible pipes made of synthetic resin are used as conduit pipes for piping inside reinforced concrete walls in such buildings and structures. A method of slab piping such a resin conduit pipe will be described with reference to FIG. 18 schematically illustrating a method of forming a reinforced concrete wall by forming a form Cp that defines the shape of a reinforced concrete wall. Reinforcing bars C are arranged on the installation side, and generally two sets of upper and lower grid-like built-in reinforcing bars Cu and Cb are arranged at predetermined intervals, and the conduit pipe P as the cable protection tube is placed before concrete is cast. In the upper and lower spaces of the upper and lower built-in reinforcing bars Cu and Cb, piping is provided on the lower reinforcing bar Cb through grids at appropriate locations of the upper reinforcing bar Cu.

[0003] At the start of work, a conventional conduit pipe P is constructed such that the tip of the pipe P is directed obliquely downward and the upper and lower rebars Cu are inserted from upper and lower grids at appropriate locations.
u and Cb, and thereafter, the pipe P was moved while inserting the hand from the grid at the next position and sequentially pulling the pipe P in a predetermined direction. The pipe P thus piped at a predetermined position and a predetermined posture
Are bound to the lower reinforcing bar Cb mainly by iron wires w at appropriate intervals, and are fixed so as not to move when concrete is poured.

[0004]

As shown in FIG. 18, since a corrugated conduit pipe made of synthetic resin needs to be long, it is usually wound around a drum like an electric wire or an iron wire. Therefore, even if it is pulled out from the drum, it has a curl that bends in an arc shape, and even if the curl is corrected by hand at the time of piping, when the hand is released, the posture becomes the same as the original. This curl is particularly pronounced at the end of the pipe where no load is applied.

[0005] Therefore, in the conventional piping method, it is necessary to adopt a piping method in which the tip of the pipe P is gripped and a hand is inserted from the lattice of the upper reinforcing bar Cu and sequentially pulled. In such a conventional method, a great deal of time and labor is required for piping work. In addition, there is a problem that the worker must bend down and perform the plumbing work, so that the fatigue of the worker is great.

[0006] As another means, it is possible to insert only the tip of the pipe P between the upper and lower rebars Cu and Cb, and then push the pipe P sequentially from the rear. In this case, even if the pipe is pushed in while being appropriately rotated in the circumferential direction so that the tip of the pipe easily advances straight, the tip of the pipe moves in a direction with a bending habit, and is indicated by a dashed line R ′ in FIG. As described above, since the tip of the pipe is caught by the upper and lower built-in reinforcing bars Cu and Cb and cannot be pushed into the pipe, or cannot be moved in an arcuate shape in the horizontal direction and the pipe cannot be substantially piped in a desired direction, it is difficult to execute the pipe. Means.

Therefore, an object of the present invention is to solve the problems of the conventional piping system, and to improve the straightness of a conduit pipe having a bending habit by improving the straightness thereof. The tip of the pipe can be directed in a desired direction, and between the upper and lower built-in reinforcing bars Cu and Cb, the tip of the pipe P advances in a substantially straight direction while sequentially passing over the lower built-in reinforcing bar Cb, and moves the conduit pipe in a predetermined direction. It is an object of the present invention to provide a piping guide member that can be easily pushed into a directional position for piping, and a conduit pipe piping method using the guide member.

[0008]

Means for Solving the Problems The structure of the conduit pipe piping guide member according to the present invention, which has been adopted to achieve the object, will be described with reference to the reference numerals used in the embodiments. And a connecting portion 2 for connecting to a conduit pipe P on the base end side.
And a connection portion 3 for connecting to a rod member R inserted into the conduit pipe P.

A conduit pipe piping method for embedding and concealing a conduit pipe in a reinforced concrete wall using this piping guide member comprises a head portion 1 having a rising arc-shaped portion 11 on the distal end side. Prepared,
In a conduit pipe piping guide member G having a connecting portion 2 for connecting to a conduit pipe P and a connecting portion 3 for a rod member at a base end side, a rod member R of a rod is connected to the connecting portion 3 of the rod member. After the connection and connection, the rod member R is inserted into the pipe through the opening at the distal end of the conduit pipe P for piping, and at the same time, the connecting portion 2 is connected to the opening of the conduit pipe P. At the top, the conduit pipe P is pushed in while being sequentially fed into the space of the built-in reinforcing steel Cu arranged at the position where the reinforced concrete wall is to be formed before the concrete is cast.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In implementing the above-mentioned guide member for conduit pipe piping, a reinforcing steel C to be passed over the shape of a rising arc-shaped portion 11 formed on a head portion 1 at a tip portion is added to the conduit pipe. It is preferable to have the tangent angle or the inclination angle with respect to the traveling direction within a range that can be overcome by only the propulsion force. This part has a spindle shape or an elliptical shape made of an elastic wire with low frictional resistance, such as steel wire or piano wire with a diameter of 1 mm to several mm, and is combined in a right angle direction with a common longitudinal main axis. Can be implemented. Further, the head portion 1 is not limited to a metal-made one, and may be a molded product formed into a spindle shape or an oblong shape by a synthetic resin material.
This part can be implemented as a part integrally formed with a connecting part 2 to a conduit pipe P described later.

The connecting portion 2 for connecting to the conduit pipe P is roughly divided into a portion having an insertion body which is internally fitted into the opening at the distal end of the conduit pipe P, and a portion having a rear opening hole which is externally fitted to the pipe. Can be divided into In the case of the former having a plug body to be fitted inside the opening of the pipe P, for example, the size of the head portion 1 side is larger than the inner diameter of the conduit pipe P and the side away from the head portion 1 is the pipe P It is preferable that the inner diameter of the pipe is large enough to be press-fitted into the open end of the pipe. The insert as the connecting portion 2 may be any one that can be fitted to only one type of conduit pipe 1 having a predetermined inner diameter, but is fitted with a plurality of types, for example, two or three types of conduit pipes having different inner diameters. By making them compatible, they can be used conveniently.
The shape of the connecting portion 2 can be entirely formed by a stepless frustoconical body, and can be individually connected to a plurality of types of conduit pipes having different inner diameters.
a, 2b... may be provided. Further, even in the case of the latter having a rear opening hole into which a pipe is fitted, the hole is not limited to the one in which only one type of conduit pipe P is inserted, and a plurality of types of pipes are inserted and connected. It is preferable that it can be used in terms of versatility.

A connecting portion 3 for connecting a rod member R to be described later.
May be any as long as the rod member R can be connected and connected in the axially extended posture. As one of the means, a connecting hole 31 for inserting the distal end of the rod member R at the rear end of the connecting portion 2 can be provided. In this case, the connection hole 31 may be a female screw hole, the distal end of the rod member R may be a male screw R1, and the connection hole 31 and the male screw R1 may be screwed and connected. Further, the connecting portion 3 and the rod member R can be connected using a connecting sleeve. Further, in the case of the above-described one having a rear opening hole for externally fitting the connecting portion 2 to the distal end portion of the conduit pipe P, a connection hole for the rod member R is formed on the inner bottom surface of the hole. The distal end of the rod member may be screw-connected to the support member 33 by projecting a support rod 33 from the bottom of the hole toward the rear.
A structure in which the rod member R is connected with the set screw 32 via the pin 4 can also be adopted. In any case, the connection hole is simply a cylindrical hole, the distal end of the rod member R is inserted, a screw screw, a bolt screw, a wing bolt, or the like is provided on the outer periphery of the connection hole, and the connection portion 2 is fixed with the set screw 32. It may have a structure.
In the case where the male screw R1 is provided on the rod member R, it is preferable to form a flat portion for engaging a wrench or a hand-held rotating portion for facilitating the screwing and rotating operation of the rod member R. .

The rod member R is used by being inserted into the inside of the conduit pipe P from the opening at the time of piping, and at least a predetermined length portion on the distal end side of the conduit pipe P is bent and deformed due to a curl. And a substantially linear posture is maintained. Therefore, it is preferably a substantially linear shape, having a suitable rigidity and a suitable flexibility, for example, having a diameter of 4 to 15 mm.
A suitable wire is a steel wire, a piano wire, an FRP wire, a polyolefin-based hard resin wire, and the like, particularly about 5 to 10 mm. The length of the rod member R is such that at least two to three or more reinforcing bars C intersecting at an unspecified angle with respect to the pipe direction of the conduit pipe P, in particular, the lower built-in reinforcing bar Cb can be straddled. If the length is too long, the work of inserting between the upper reinforcing bar Cu and the lower reinforcing bar Cb becomes longer, so that a length of about 2 to 4 m is appropriate. Incidentally, the rod member R can be manufactured as an integrally molded product together with the head portion 1 and the connecting portion 2.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, FIG. 1 is a perspective view showing a first embodiment of a conduit pipe piping guide member of the present invention together with a main part at the time of piping work, FIGS. 2 to 4 are front views of the same embodiment,
It is a side view and a rear view. FIG. 5 is a perspective view of a modification of the first embodiment, and FIG. 6 is a second view of a conduit pipe piping guide member.
FIG. 7 is a perspective view of the third embodiment, FIG. 8 is a perspective view of a modification of the third embodiment, and FIG. 9 is a perspective view of the fourth embodiment.

In the perspective view shown in FIG. 1, the upper and lower built-in reinforcing bars Cu and Cb showing the peripheral state of the conduit pipe P at the time of piping are indicated by dashed lines for reference. In the first embodiment, the riding arc-shaped portion 11 formed in the head portion 1 has a structure in which a piano wire having an outer diameter of about 3 mm is formed into an elliptical shape and combined at right angles with a common longitudinal main axis. . The connecting portion 2 has a three-stage structure of a large diameter portion 2a, a medium diameter portion 2b, and a small diameter portion 2c corresponding to three types of conduit pipes having different inner diameters. The outer shape of each of the steps 2a, 2b, 2c is such that the outer diameter at the front end side is slightly larger than the inner diameter of the conduit pipe P, and the outer diameter at the rear end side is easy to insert into the conduit pipe. It has a tapered shape slightly smaller than the inner diameter.

A rod member R is connected to the connecting portion 2 by a connecting portion 3.
And a screw hole 31 'is formed in the small diameter portion 2c, and the rod member R
A rod screw R1 is applied to the end of the screw hole 31 and the rod screw R1.
Are screwed together. The diameter of the connecting portion 2 of the present embodiment is adjusted to the inner diameter of the conduit pipe, and the large-diameter portion 2a has an inner diameter of 22 mm and the middle-diameter portion 2b has an inner diameter of 1 mm.
The 6 mm diameter and the small diameter portion 2c are set for the 14 mm inner diameter, but it is needless to say that these numerical values should be appropriately set as necessary.

FIG. 5 shows the appearance of a modification of the first embodiment.
In this modified example, annular unevenness 2f is formed on the outer surface of each step portion such as large diameter portion 2a, middle diameter portion 2b, small diameter portion 2c, etc. of connecting portion 2, and the two are tightly coupled by being inserted into the annular unevenness of the conduit pipe. This is the structure to be tried.

FIG. 6 shows the appearance of the second embodiment. This second
The embodiment has a structure in which the connecting portion 2 is a stepless tapered portion 2d in order to correspond to a plurality of types of conduit pipes having different inner diameters. The structures of the head portion 1 and the connecting portion 3 of the rod member R are the same as in the first embodiment. Also in the second embodiment, the annular unevenness 2f can be formed on the outer surface of the stepless tapered portion 2d as shown by the dashed line.

FIG. 7 shows the appearance of the third embodiment. This third
In this embodiment, the connecting portion 2 is of an external fitting type with respect to the conduit pipe P, and has a cylindrical shape whose inner surface is a conical surface portion 2e, which is dimensioned to be externally fitted to the opening at the tip end of the conduit pipe P. The large-diameter conduit pipe P is
The small-diameter conduit pipe P is gripped at a position near the bottom of the conical surface 2e.
The head portion 1 has a shape similar to that of each of the above-described embodiments, but is integrally formed with the connecting portion 2 by using reinforced plastic.
The connecting portion 3 with the rod member R of this embodiment has a structure in which a support rod 33 is integrally formed at the bottom of the conical surface portion 2e, and the rod member R is connected to the support rod 33 via a joint 34. Things. The distal end of the rod member R is inserted into the connection hole 31 of the joint 34 and fixed with a set screw 32. The set screw 32 has a structure in which the head does not protrude from the side surface of the joint 35 so that the head screw does not get caught on the steel bar material of the rebar Cu during piping work.

FIG. 8 is a perspective view of a modification of the third embodiment. In this modified example, a screw hole is formed as a connection hole 31 at the bottom of the connecting portion 2 of the external fitting type, and the connection hole 31 and the rod screw R1 are connected to each other by using the tip of the rod member R as a rod screw R1. Are connected by screwing.

FIG. 9 shows the appearance of the fourth embodiment. This fourth
The embodiment has a structure in which the head portion 1, the connecting portion 2, and the rod member R are integrally formed of synthetic resin. This is a structure for providing the conduit pipe piping guide member at the lowest cost. The head portion 1 has a basic outer shape similar to that of the other embodiments, but has a complete spindle shape by utilizing the features of the synthetic resin molded product. An elongated hole 12 is formed in the main shaft position for use in hanging for storage, rope tying, and the like. As the material, a reinforced plastic filled with inorganic fibers is used.

FIG. 10 shows the appearance of the fifth embodiment. For the purpose of further simplification, the fifth embodiment is an embodiment in the case of a shape corresponding to a plurality of types of conduit pipes.
The head part 1 and the connecting part 2 are continuously formed integrally by using a wire material such as a piano wire, the tip part is in a spindle shape, and the connecting part is in a parallel shape in a rod shape. The connecting portion 3 with the rod member R is a joint 34 having the same structure as that of the third embodiment.
Is attached to the end of the connecting portion 2, the distal end of the rod member R is inserted into the connection hole 31 of the joint 34, and the set screw 3
It is fixed at 2.

FIGS. 11 to 13 show a plan view, a side view, and a plan view in a used state of the sixth embodiment. This sixth
For the purpose of further simplification, the embodiment is an example of a structure corresponding to a plurality of types of conduit pipes P.
The connecting portion 2 is formed by continuously and integrally forming the distal end portion and the connecting portion into a long spindle shape by using a spring member such as a piano wire having elasticity. As shown in FIG.
In use, a part of the spindle shape of the connecting portion 2 is deformed and inserted into the conduit pipe P, and is connected to the conduit pipe P by a resilient force.

FIGS. 14 and 15 show the cross-sectional structure and appearance of the seventh embodiment. This embodiment has a structure for easily and quickly attaching and detaching the rod R. The rod R having the annular groove formed in the vicinity of the tip is connected to the connection hole of the connection portion 3 of the guide member G. , The hook 35 provided in the cut portion of the connection portion 3 enters the annular groove while being rotated around the shaft 38 by the elasticity of the spring 36 and is clamped. Attached to To release the rod after the operation, pressing the lever 37 causes the lever and the hook to rotate around the shaft 38 in the opposite direction, the hook 35 comes off the annular groove, and the rod R can be pulled out.

Although not shown in the figures, a conduit pipe piping guide member of a type in which a conduit pipe is fitted inside has an annular unevenness on the outer peripheral surface of the connecting portion 2 in addition to the modification of the first embodiment shown in FIG. There is a modified example in which the above is applied. Further, it goes without saying that there is also a modified example in which an annular concave and convex portion is formed on the inner peripheral surface of the tapered hole of the connecting portion 2 for the guide member for the conduit pipe of the external fitting type.

FIGS. 1, 16 and 17 show an outline of a method of piping a conduit pipe during operation. FIG. 1 shows the connected state of the conduit pipe P and the guide member G for conduit pipe piping and the initial state of pushing between the upper and lower rebars Cu and Cb, and FIG. 16 shows the overall working state of the same state in a wide area. . Specifically, after connecting and connecting the rod-shaped rod member R to the connecting portion 3 of the conduit pipe piping guide member G,
The rod member R is inserted into the pipe from the distal end opening of the conduit pipe P for piping, and at the same time, the connecting portion 2 is connected to the opening of the conduit pipe P. Thereafter, the guide pipe G is used as the distal end with the guide member G as the distal end. Reinforcement Cu above and below the reinforced concrete wall before casting concrete,
It is sent between Cb and piped to a predetermined position. At this time, since the rod member R has flexibility at the beginning of the operation, the distal end portion of the conduit pipe P into which the rod member R is inserted is slightly bent so that the rod member R can be easily placed between the reinforcing bars Cu and Cb from the outside. After the insertion, the conduit pipe P becomes straight due to the rigidity of the rod member R, and as it is extruded, the conduit pipe P smoothly passes over the lower reinforcing bar Cb over the bar of the reinforcing bar, and the influence of the reinforcing bar Cb is reduced. Go straight in the direction you originally set without receiving it.

FIG. 16 shows an example in which a horizontal wall is connected to a vertical wall, and FIG. 17 shows an example in which a concrete box CB (electric wire connection box) for connecting electric wires is installed on the horizontal wall. In this case as well, before and after the concrete box CB, the conduit pipe P is bound by the iron wire w so that the conduit pipe P does not move at the time of placing the concrete. In addition, when the position of the connection portion with the concrete box CB is different from the laying position of the conduit pipe P and does not coincide with the laying position of the conduit pipe P, it is necessary to use a bent pipe called S-bend especially when a metal pipe is used as in the past. However, by using a flexible conduit pipe as in the present invention, it is possible to directly and freely connect as it is.

Although the embodiments and modifications which are considered to be representative of the present invention have been described above, the present invention is not necessarily limited to only the structures of the embodiments, but includes the above-mentioned constituent elements of the present invention. In addition, the present invention achieves the object of the present invention, and can be implemented with appropriate modifications within a range having the following effects.

[0029]

As is clear from the above description, the guide member for conduit pipe piping according to the present invention has a flexible structure between the upper and lower rebars formed in the upper and lower two layers before the concrete is cast. It is used for pipe work of a conduit pipe having a head portion provided with a rising arc-shaped portion on the distal end side, a connecting portion to the conduit pipe on the rear end side, a rod member inserted into the conduit pipe and And the connecting pipe 3 is pushed out substantially in the horizontal direction from the distal end side of the conduit pipe, so that the rising arc-shaped part of the head part at the distal end moves forward over the reinforcing bar, and the conduit connected to the rear side Conduit with a bending habit, the tip side of the pipe being advanced while maintaining a substantially straight posture by the internal insertion rod member Even if it is a pipe, it is possible to improve its straightness, and it is possible to pipe while pushing the conduit pipe between the upper and lower built-in rebars from the rear while turning the tip of the pipe in a desired direction. It was.

Further, the piping method according to the present invention can provide a substantially straight posture at least at a predetermined length of the distal end portion of a conduit pipe having a bending habit. By using the pipe guide member provided with a head portion on which the rebar can easily pass over the distal end side by connecting it to the distal end portion of the conduit pipe to be piped, the straightness of the conduit pipe is improved, and the conduit pipe is improved. It is possible to advance in a substantially straight direction while sequentially climbing over the lower built-in rebar from the tip end side, and the conduit pipe can be easily pushed into the predetermined direction position and piped, so the pipe of the conduit pipe is extremely easy This has a remarkable effect that piping can be performed quickly and reliably in a short time.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention together with a peripheral portion during work.

FIG. 2 is a front view of the first embodiment.

FIG. 3 is a partially cutaway side view of the first embodiment.

FIG. 4 is a rear view of the first embodiment.

FIG. 5 is a perspective view of a modification of the first embodiment.

FIG. 6 is a perspective view of a second embodiment.

FIG. 7 is a perspective view of a third embodiment.

FIG. 8 is a perspective view of a modification of the third embodiment.

FIG. 9 is a perspective view of a fourth embodiment.

FIG. 10 is a perspective view of a fifth embodiment.

FIG. 11 is a partially cutaway plan view of the sixth embodiment.

FIG. 12 is a side view of the sixth embodiment.

FIG. 13 is a plan view showing a use state of the sixth embodiment.

FIG. 14 is a longitudinal sectional side view showing a seventh embodiment.

FIG. 15 is an external perspective view of a seventh embodiment.

FIG. 16 is an explanatory view showing a conduit pipe piping method.

FIG. 17 is an explanatory view showing a pipe state of a conduit pipe.

FIG. 18 is an explanatory view showing a conventional piping method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head part 11 Riding-on arc part 2 Connecting part 2a Large diameter part 2b Medium diameter part 2c Small diameter part 2d Stepless taper part 2e Conical surface 2f Annular unevenness 3 Connection part 31 Connection hole 32 Set screw G Guide member for conduit pipe R rod Member R1 Male screw Cu Upper reinforcing bar Cb Lower reinforcing bar Cp Formwork CB Concrete box w Iron wire

Claims (6)

[Claims] 1. A head part (1) having a rising arc-shaped part (11) at a distal end side, a connecting part (2) to a conduit pipe (P) at a proximal end side, and a head part (1) inside a conduit pipe (P). A conduit pipe piping guide member including a connecting portion (3) with a rod member (R) to be inserted. 2. A connecting part (2) to the conduit pipe (P).
The conduit member according to claim 1, further comprising a plurality of types of steps (2a), (2b), ... which can be connected to a plurality of types of conduit pipes having different inner diameters. 3. A connecting part (2) to the conduit pipe (P).
Is formed in a stepless tapered portion (2d) connectable to a plurality of types of conduit pipes having different inner diameters.
2. The guide member for conduit pipe piping according to item 1. 4. A connecting part (2) to the conduit pipe (P).
The cylindrical body having an inner surface formed as a conical surface (2e) having a size that is fitted to the distal end openings of a plurality of types of conduit pipes P having different outer diameters. Guide member for conduit pipe piping. 5. The connecting part (3) of the rod member (R) has a connecting hole (31) for inserting a tip part of the rod member (R). A guide member for conduit pipe piping according to any of the claims. 6. A piping method for a synthetic resin conduit pipe for concealing piping in a reinforced concrete wall, comprising: a head portion (1) having a rising arc-shaped portion (11) at a front end side; and a conduit at a base end side. In a conduit pipe piping guide member (G) including a connecting portion (2) to a pipe (P) and a connecting portion (3) of a rod member, a rod is connected to a connecting portion (3) of the rod member. After connecting and connecting the rod member (R), the rod member (R) is inserted into the pipe from the distal end opening of the conduit pipe (P) for piping, and at the same time, the connecting part (2) is connected to the conduit pipe (P). It is connected to the opening, and thereafter, the conduit pipe (P) with the guide member (G) at the top, in the space of the built-in reinforcing bar (Cu) arranged at the reinforced concrete wall formation planned position before concrete casting. Of conduit pipes to be pushed in while sequentially feeding Tube method.