JPH0448422Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a connecting duct that can be used when the duct is installed across two spaces partitioned by partition members such as walls and floors. This relates to a connecting duct for communicating the ducts arranged in both of the spaces.

[Prior art]

Conventionally, the following is known as a construction procedure for duct piping work when, for example, a duct is installed through a wall that partitions both spaces.

First, in the stage of forming the wall, a wooden frame assembled with an outer diameter larger than the outer diameter of the duct is placed at the location where the duct is to be installed, and concrete is poured around this wooden frame to form the wall. Form. Then, a through hole for providing the duct is formed.

After the concrete has dried and hardened, the wooden frame is removed and ducts are installed in both spaces through the through holes. Furthermore, mortar is embedded in the gap between the outer peripheral surface of the duct and the inner peripheral surface of the through hole. As a result, the airtightness between the two spaces is ensured, and fireproofing and soundproofing effects are enhanced.

[Problem that the invention attempts to solve]

However, in the above method, after the concrete hardens, the wooden frame must be removed, and after the duct is installed in the through hole, mortar is placed between the outer peripheral surface of the duct and the inner peripheral surface of the through hole. There is a problem that the duct piping work cannot be carried out efficiently because it has to be buried.

Another problem is that by embedding mortar, the finished surface between the periphery of the duct and the periphery of the through hole becomes uneven, resulting in an unsightly appearance.

Therefore, the present invention was devised in view of the above circumstances, and allows the ducts installed in both spaces to communicate with each other without providing a through hole in the wall that partitions the space and installing the duct through it. The purpose of the present invention is to provide a connecting duct which allows piping work to be carried out efficiently and allows the finished surface between the wall and the duct to be evenly aligned.

[Means for solving problems]

In order to achieve the above object, the main means adopted by the present invention is to communicate with each other ducts that are embedded in a partition member and are respectively arranged in both spaces partitioned by the partition member. This connection duct is constructed by welding together a bent member whose cross section is formed into a U-shape by bending.

[Effect]

The ducts arranged in both spaces are respectively connected to opposing bent pieces of the bent member formed by the bending process. As a result, both the ducts are in communication with each other via the connecting duct.

Furthermore, since the connecting duct is embedded in the partition member in advance and does not need to be removed, no gap is created between the connecting duct and the wall.

Note that by interposing a sealing material between the bent piece and the duct, the sealing effect of the duct can be further improved.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples embodying the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention.
It should be noted that the following example is an example embodying the present invention, and is not intended to limit the technical scope of the present invention.

Here, FIG. 1 is a perspective view of a connection duct according to an embodiment of the present invention, FIG. 2 is a perspective view of a bending member constituting the connection duct, and FIG. 3 is a perspective view of the ducts arranged in both spaces. FIG. 3 is a side cross-sectional view of a state in which the two are connected using the connection duct.

As shown in FIGS. 1 and 2, the connection duct A according to this embodiment is constructed by welding together four bent members 1 each having a U-shaped cross section by bending. ing.

The bending member 1 is formed of a thin iron plate, and a pair of first bending pieces 3, 3 are vertically provided on opposite sides of the bending piece body 2 in the longitudinal direction. The first bent piece 3 is provided with a plurality of through holes 3a into which bolts are inserted.

A second bent piece 4 is vertically erected at one end in the longitudinal direction of the bent piece main body 2, and between this second bent piece 4 and one end of the first bent piece 3. A notch 5 is formed in the. The width T of the notch 5 is set to be equal to the width H of the first bent piece 3.

A framework as shown in FIG. 1 is formed by sequentially fitting the other end of the other bending member 1 into the notch 5 of the bending member 1 having the above-described shape. Then, the connecting duct A is formed by welding the hatched portion in FIG.

In the connecting duct A constructed as described above, as is clear from FIG. 1, an extremely good sealing effect can be obtained by welding only a few places.

Furthermore, when framing the folding member 1, the other end of the folding member 1 can be fitted along the second folding piece 4 that stands perpendicularly to the folding piece main body 2, so that precision can be achieved. A good connection duct A can be easily assembled.

Moreover, as mentioned above, this connection duct A is
Since it is made of a thin iron plate, it is relatively light in weight and easy to handle, allowing for efficient duct piping work.

In addition, in the connection duct A, as shown by the two-dot chain line in FIG.
By forming the collar 3b at the upper end of the first bent piece 3 by bending, the strength of the first bent piece 3 can be improved.

Next, referring to FIG. 3, a construction procedure will be described in which the connecting duct A is used to connect the ducts 7 and 8 respectively arranged in both spaces partitioned by the wall 6 (partition member).

First, when forming the wall 6, the duct A is placed at the position where the ducts 7 and 8 are to be provided, and concrete is poured around it.

After the concrete dries and hardens, the duct 7 is placed on one side of the first bent piece 3 of the bending member 1 constituting the connection duct A with a sealing material 9 interposed therebetween. The duct 7 is connected to the connecting duct A by connecting the duct 7 and the first bent piece 3 with the bolt 10 and nut 11.

On the other hand, when connecting the duct 8 to the connecting duct A, first the auxiliary duct 13 is attached to the other first bent piece 3 of the bent member 1 with a sealing material 9 interposed therebetween. This auxiliary duct 13
The auxiliary duct 13 is provided with third bent pieces 13a facing outward at both ends thereof to facilitate the installation work of the bolts 10 and nuts 11. ing.

Then, the duct 8 is attached to the other third bent piece 13a side of the auxiliary duct 13 with a sealing material 9 interposed therebetween by bolts 10 and nuts 11.

Incidentally, by performing a burning process on the other first bent piece 3 of the above-mentioned bending member 1 to carve a female thread, or by using a bolt with a hook-shaped tip, it is possible to eliminate the use of the above-mentioned auxiliary duct 13. It is also possible to connect the duct 8 directly to the connecting duct A.

Furthermore, by providing glass wool 14, which is used as a heat insulating material, for example, in the recess inside the connecting duct A, the inner circumferential surface of the connecting duct A can be made smooth with respect to the inner circumferential surfaces of the ducts 7 and 8. It is also possible to configure it so that

In the connection duct A used as described above, since the connection duct A is buried in advance when forming the wall 6, there is no gap between the wall 6 and the connection duct A. , the sealing effect is extremely high. Therefore, the work of embedding mortar, which was required in the conventional duct piping work, is no longer necessary.

[Effect of idea]

As described above, the present invention is a connecting duct which is embedded in a partition member and is for communicating with each other ducts arranged in both spaces partitioned by the partition member, and which has a cross section that is shaped by bending. Since the connection duct is characterized by being formed by welding together a bent member formed in the shape of a square, if the duct is to be piped across both spaces, a through hole may be provided in the partition member. Even if the duct is not installed through the duct, by using the above connection duct, there is no need to install or remove a wooden frame to secure the duct through hole, which is required in conventional piping work, and the duct There is also no need to embed mortar between the outer peripheral surface and the inner peripheral surface of the through hole.

As a result, the duct piping work can be performed efficiently.

Furthermore, since the mortar embedding work described above is not required, the finished surfaces between the partition member and the duct can be evenly aligned.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a connecting duct according to an embodiment of the present invention, Fig. 2 is a perspective view of a bending member constituting the above-mentioned connecting duct, and Fig. 3 shows the above-mentioned connection of the ducts arranged in both spaces. FIG. 3 is a side cross-sectional view in a state where the devices are connected using a duct. Explanation of symbols: 1...Bending member, 6...Wall (partition member), 7, 8...Duct, A...Connection duct.

Claims (1)

[Scope of utility model registration request] A connecting duct that is embedded in a partition member and is used to interconnect ducts arranged in both spaces partitioned by the partition member, and is a bending member whose cross section is formed into a U-shape by bending. A connecting duct characterized in that it is framed by welding.