JPS6362619B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is for forming a space that can be connected to the outside, a so-called pipe end, in a part corresponding to the end of a pipe for laying electric wires buried in the ceiling or wall surface of a concrete building, etc. It relates to mold materials used for.

Conventionally, when burying pipes for laying electric wires in the ceiling or wall surface, etc., it was necessary to make it easier to draw in the wiring from the end of the pipe after removing the temporary frame for concrete pouring, or to install an extension pipe to the end of the pipe. To facilitate the connection, there are two methods: drilling holes in the temporary frame and pouring concrete with the end of the pipe protruding outside the temporary frame, and using a hollow plate made of sheet metal or resin called a pipe end cover that is fixed to the temporary frame. The method used was to hold the end of the pipe with a similar tool and pour concrete.

However, in the former case, if the diameter of the hole and the diameter of the pipe do not match completely, there is a risk of concrete leaking, and if the pipe is inserted at a certain angle to the temporary frame, the hole should be in the form of a long groove. Because of this necessity, the above-mentioned problem of concrete leakage is serious, and the construction is not only troublesome, but also causes an increase in the number of construction steps, which is not preferable in terms of workability.

In addition, in the latter case, the above-mentioned piping covers are required, and since these tools are disposable, only the number of piping pull-out parts is required.For example, in a building such as a building, this number is quite large, which reduces the number of construction steps. There was a problem in that the amount of money was increasing and the required expenses were also increasing. With such piping covers, it is necessary to take into account the inflow of concrete into the internal space and changes in the cover due to external pressure during concrete placement.In particular, with flexible covers, the pipe may be eccentric and the temporary frame may be damaged. The drawback was that it was difficult to connect extension piping after removal.

The present invention was developed in view of the above circumstances, and is composed of two solid members, one of which is configured to be able to be temporarily fixed in contact with a temporary frame for concrete pouring, and the other is configured to be able to be temporarily fixed in contact with a temporary concrete pouring frame. By forming an insertion hole for accommodating and holding the buried pipe ends and connecting them so that they can be sequentially taken out from the opening, it is possible to easily create a space that can be externally connected to the pipe ends. A pipe end forming material that can be formed reliably, allows easy wiring or connection of extension piping, and can be used multiple times, significantly reducing construction costs compared to conventional disposable covers. It provides:

Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.

1A to 1C show an embodiment of a pipe end forming mold material according to the present invention, and in these figures, the mold material generally designated by the reference numeral 10 is made of a metal material such as aluminum or iron, or a hard material. It is composed of first and second members 11 and 12 that are made of synthetic resin material or the like in a solid shape. The first member 11 has a substantially semicylindrical shape as a whole, and its lower flat surface 11a constitutes a contact surface that comes into contact with the temporary concrete casting frame 20 shown in FIG. 2A,
Further, among the upper curved surface 11b, the upper portions of the leading end side and the rear end side are gently curved surfaces 11c and 11d. A through hole 13 is bored in the first member 11 from the upper curved surface 11b to the lower flat surface 11a, and a fixing fitting such as a nail 14 as shown in FIG. 2A is inserted into the through hole 13. The first member 11 is configured to be temporarily fixed onto the temporary frame 20 by inserting the first member 11 and driving it into the temporary frame 20 with a hammer 21 or the like. Of course, it is possible to use wood screws, bolts, etc. as fixing fittings instead of nails 14, etc., and furthermore, this first member 11 can be temporarily fixed on the temporary frame 20 by other well-known fixing means. Good too.

On the other hand, the second member 12 disposed on the rear end side of the first member 11 has a semicylindrical shape having a slightly smaller outer diameter than the first member 11, and its lower flat surface 12a is as described above. Like the first member 11, it is in contact with the temporary frame 20, and the upper curved surface 12b is formed to be inclined so that the diameter gradually increases from the rear end side to the first member 11 side. There is. An insertion hole 15 is formed from the rear end to the front end of the second member 12 to receive and hold the end of the pipe 22 buried in the concrete {see FIG. 2A}. In this case, according to the present embodiment, the end portion of the pipe 22 is arranged substantially parallel to the temporary frame 20.

Moreover, the connecting side ends of the first and second members 11 and 12 are cut out from the end faces to the lower flat surfaces 11a and 12a, respectively. The first and second members 11 and 12 are connected by a connecting piece 19 that is disposed within these notches 16a and 16b and is pivotally supported on each member 11 and 12 by pins 17 and 18. There is. Therefore, in both of these members 11 and 12, the first member 11 can be rotated independently with respect to the second member 12, so that the first member 11 can be moved to the second member after the temporary frame 20 is removed. It becomes possible to take it out from the concrete 23 prior to the member 12 {see FIG. 2C}.

Shape material 1 for forming a pipe end with the above-described configuration
0 is used as follows. First, Figure 2A
As shown in FIG.
2, and its end 22a is inserted into the insertion hole 15 of the second member 12 in the mold material 10 and held therein, and in this state, the first member 11 is temporarily fixed to the inner surface of the temporary frame 20 with nails 14. do. At this time, the lower flat surface 11a of the first member 11 is placed in contact with the inner surface of the temporary frame 20, and the second member 12 also has its lower flat surface 12a placed on the temporary frame 20, and its tip side end surface is placed on the inner surface of the temporary frame 20. 1 and is placed in contact with the member 11 side of No. 1. In this state, the second member is fixed by the nail 14 and pipe 22 that temporarily fix the first member 11.

Therefore, in the above-mentioned state, FIG.
As shown in FIG. 2C, if concrete 23 is poured and the temporary frame 20 is removed after the concrete 23 has hardened, the first member 11 is formed by its flat portion 11a, as shown in FIG. 2C. opening 24
It can be taken out from At this time, since the first member 11 is fixed to the temporary frame 20 with nails 14, when the temporary frame 20 is removed, the concrete 2
3, but if the nail 14 is not pulled out sufficiently, the tip of the nail 14 may be pinched with a jig such as pliers and removed.

Next, as shown in FIG. 2C, the second member 12 is hammered out into the space 25 side formed in the concrete 23 by the first member 11 using a hammer 21 and removed from the pipe end 22a. , opening 2
4, as shown in FIG.
will be exposed. Further, the work of passing the electric wire 27 etc. from the pipe end 22a and the work of connecting to the extension wiring 29 using the connecting member 28 can be easily and reliably performed.

That is, the points to be careful of when using the mold 10 that holds the pipe end 22a buried in the concrete 23 and forms the spaces 25 and 26 in the concrete 23 are that when the mold 10 is taken out from the concrete 23, The pipe end portion 22a is configured so that the shape material 10 is pulled out in the insertion direction of the pipe 22.
It is necessary to ensure that no compensation is given to According to the present invention, in order to satisfy the above-mentioned requirements, the shape material 10 is divided into two solid members 1 and 1.
This has been achieved by a simple structure in which both members 11 and 12 are connected so that they can be taken out from the concrete 23 one after the other.

Therefore, according to the mold material 10 having such a configuration, the space portions 25, 26 facing the pipe end portion 22a are smaller than when a conventional pipe cover is used.
It can be easily and reliably formed, and since it is easy to handle, it simplifies the construction process of underground piping work and reduces the required costs.Furthermore, it can be used any number of times, so it can be used for a large number of pipes. For construction work that requires a drawer, construction costs can be significantly reduced compared to conventional disposable covers.

In addition, in the above-mentioned embodiment, the concrete 23
Although the case has been described in which the insertion direction of the pipe end portion 22a buried therein into the mold material 10 is approximately parallel to the temporary frame 20, the present invention is not limited to this, and may be configured as shown in FIGS. 3A and 3B. By doing,
It is also possible to deal with the case where the pipe 22 is guided at a predetermined angle with respect to the temporary frame 20. That is, the second member 12 may be formed to extend in the insertion direction of the pipe 22, and the insertion hole 15 may be formed accordingly.

Further, in the above-described embodiment, the first and second members 11 and 12 constituting the mold material 10 are formed in a solid shape, but it is free to form the inside by hollowing out the inside as appropriate. As shown in FIGS. 3A and 3B, a pull-out groove 30 for pulling out the first member 11 may be formed, and the groove may be pulled out using pliers or the like.

Furthermore, in the above embodiment, the first and second members 11 and 12 are rotatably connected by the pins 17 and 18 and the connecting piece 19, but
The present invention is not limited to this, but for example, as shown in FIG.
It may also be configured to connect by fitting into 2. In this case, the connecting rod 31 needs to be formed by extending the first member 11 in the direction in which it is pulled out from the opening after the temporary frame 20 is removed. According to such a configuration, after the first member 11 is taken out from the concrete 23, the second member 12 can be taken out using the space.

As explained above, according to the pipe end forming material according to the present invention, the first member is brought into contact with and temporarily fixed on the temporary frame, and the insertion hole that accommodates and holds the pipe end buried in concrete. and a second member having a hole, and these two members are connected so that they can be taken out sequentially from the first member side, so despite the simple structure, the space facing the end of the pipe can be easily removed from the concrete. It can be easily and reliably formed into pipes, and not only is the construction work simple, but it can also be used many times, which significantly reduces construction costs for construction projects that require a large number of pipe pull-out sections of this type. It has excellent effects such as:

[Brief explanation of drawings]

1A to 1C are a front view, a bottom view, and a side view showing an embodiment of the pipe end forming material according to the present invention, and FIGS. 2A to 2D are process diagrams for explaining the construction order. 3A and 3B are a front view and a bottom view showing another embodiment of the present invention, and FIG. 4 is a sectional view showing another embodiment of the present invention during construction. DESCRIPTION OF SYMBOLS 10... Shape material for pipe end formation, 11... First member, 11a... Flat surface (contact surface), 12...
...Second member, 13...Through hole (fixing means), 1
4... Nail (fixing metal fittings), 15... Pipe insertion hole,
19... Connecting piece, 20... Temporary frame for concrete placement, 22... Pipe, 22a... Pipe end, 2
3...Concrete, 24...Opening, 25,2
6...Space part, 27...Electric wire, 28...Connection member, 29...Extension piping, 31...Connection rod.

Claims (1)

[Claims] 1 A shape material for forming a pipe end that is open to the outer surface of the concrete and forms a space where the end of the pipe buried in the concrete can be viewed and connected to the outside, and this shape material is attached to the temporary frame forming the outer surface of the concrete. A first having a contact surface that contacts to form an opening and a fixing means for temporarily fixing to the temporary frame.
and a second member formed with an insertion hole for accommodating and holding the end of the pipe, and both of these members are arranged so that the first member can be taken out from the opening before the second member. A pipe end forming material characterized by being connected to.