JPS6248117B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to the structure of a duct connecting portion.

[Conventional technology and its problems]

Conventionally, in the connecting portion of a duct, a packing made of a long strip made of pine, such as a nonwoven fabric made of inorganic fibers, particularly glass fibers, is sandwiched between opposing flanges.

However, when packing made by cutting cut inorganic fiber pine as described above is used for the duct connection, the cut edge of the pine contains fiber fragments, so these fiber fragments are sucked into the duct when air is blown. The fibers are drawn out and discharged into the room through the duct, which is hazardous to hygiene.

Therefore, an object of the present invention is to prevent the fiber fragments contained in the cut edges of the packing from being drawn out into the duct.

[Means for solving problems]

In order to solve the above problems, this invention
A curable glue is applied over the entire length of at least one side edge end face of a band-shaped packing of the required width obtained by cutting from inorganic fiber mat, and the edge on the glue-applied side is used to connect the duct between both flanges at the joint of the duct. It is located on the inner side of the.

[Effect]

The present invention has the above-mentioned configuration, and the packing interposed in the connecting part of the duct is a band-shaped body of the required width obtained by cutting from inorganic fiber mat, and at least one side edge end face is hardened over its entire length. Since the sizing agent is applied and the edge of the side coated with the sizing agent is positioned on the inner side of the duct joint, the fiber fragments contained in the cut edge of the packing will be absorbed by the hardening of the sizing agent. It is completely fixed to the cut edge and will not come off.

〔Example〕

Next, embodiments of the present invention will be described based on the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a packing (packing material), and this packing is a long belt-like body having a required width and obtained by cutting from a nonwoven glass fiber mat.

In this packing, a curable synthetic resin liquid or other curable glue having adhesive properties is applied to the end face of one side of both cut edges. 2 indicates a hardened adhesive.

The packing shown in the figure has a pressure sensitive adhesive layer 3 on one side.
This adhesive layer is covered with release paper 4.

Figure 2 shows this packing 1 connected to ducts 5a and 5b.
Fig. 3 shows a state in which the packing 1 is interposed between the flanges 6a and 6b at the connecting part, and the edge on the side where the glue 2 is applied is on the inside of the duct. . Also, this packing is cut to match the length of each side of the flange. 7a and 7b indicate bolts that fasten both flanges.

〔effect〕

Since this invention is as described above, even when the blown air flows inside the duct, the fibers included in the cut edge of the packing are pulled out and these fiber fragments are discharged into the room, thereby improving hygiene. This has the effect of effectively preventing things that would cause harm to people.
Further, according to this invention, since the packing interposed at the duct connection part has a hardening adhesive applied to the side edge end face exposed inside the duct, even if the packing is made of fiber cut from an inorganic fiber mat, Regardless of the size, the glue will completely clog the duct and perform its packing function, and there will be no inconvenience that condensed water from the steam flowing inside the duct or evaporated oil droplets from frying will penetrate the packing and flow out of the duct. effective.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of an example of packing to be interposed in the connecting portion of a duct according to the present invention, and FIG.
The figure is a perspective view of a duct connecting part using the same packing, and FIG. 3 is an enlarged vertical sectional view of the main part of the same. 1... Packing, 2... Curing adhesive, 5a,
5b...Duct, 6a, 6b...Flange.

Claims (1)

[Claims] 1 Apply a curable glue to the entire length of at least one side edge end face of a band-shaped packing of the required width obtained by cutting from inorganic fiber mat, and apply the glue-applied edge between both flanges at the joint of the duct. A structure of a duct connecting part characterized by being located on the inner side of the duct.