JP2021080963A - Joint for duct - Google Patents

Abstract

To provide a joint for a duct which can connect an exhaust duct to a connection exhaust port of a range hood in a direction at a desired angle.SOLUTION: A joint 1 for a duct of the invention is connected at one end with a cylindrical exhaust duct 240 having a passage therein and connected at the other end with a connection exhaust port 430 of a range hood 420. The joint 1 for the duct comprises: a first cylinder part 100; a first fitting part 110; a second fitting part 210; and a second cylinder part 200. An outer peripheral surface of the first fitting part 110, which is joined to an end part of the first cylinder part 100 and has a semi-spherical shape, and an inner peripheral surface of the second fitting part 210, which is joined to an end part of the facing second cylinder part 200 and has a semi-spherical shape, are pushed to each other to be fitted.SELECTED DRAWING: Figure 1

Description

The present invention relates to a duct joint, and in particular, provides an internal flow path which is arranged in a kitchen or a room in a hotel, a restaurant, or a home and is used for exhausting and ventilating smoke, indoor air, and the like. It is useful as a duct joint applied to a tubular duct having.

Ducts are used to exhaust dirty exhaust from hotels, restaurants or kitchens in the home, or to exhaust air in the living room and introduce fresh air outside the building.

Japanese Unexamined Patent Publication No. 11-148692

The exhaust elbow in the prior art described in Patent Document 1 has a screw insertion hole of a flange portion formed on the lower surface of the mounting with respect to the upper portion where the connection exhaust port of the range hood is opened, and a screw provided on the upper portion of the range hood. It is necessary to screw the holes together.
At that time, there is a problem that it is difficult to convert the connection direction to the exhaust duct using the exhaust elbow to a direction other than 90 ° in either the back direction of the range hood or both side surfaces.

That is, in the prior art described in Patent Document 1, the range hood in which the exhaust duct piped inside the descending ceiling is located in the connection direction such as 45 ° or 60 ° with respect to the connection exhaust port of the range hood. There was a problem that it was difficult to apply other than the installation conditions of.

An object of the present invention is to provide a duct joint in which an exhaust duct can be connected in a direction of a desired angle with respect to a connection exhaust port of a range hood.

The present invention provides the following solutions.

The invention according to the first feature is a duct joint that connects one end to a tubular exhaust duct having a flow path inside and the other end to a connection exhaust port of a range hood, and is a first tubular portion. To face the outer peripheral surface of the hemispherical fitting material, which is composed of a fitting material, a second fitting material, and a second base material and is joined to the end of the first tubular portion. Provided is a duct joint to be fitted by pressing the inner peripheral surface of the hemispherical second fitting member to be joined to the end portion of the second base material against each other.

According to the invention according to the first feature, it is possible to provide a duct joint capable of connecting an exhaust duct in a direction of a desired angle with respect to a connecting exhaust port of a range hood.

The invention according to the second feature is an invention according to the first feature, for a duct in which the fitting member is rotatably fitted to the second fitting member with the center of the sphere as a fulcrum. Provide fittings.

According to the invention according to the second feature, it is possible to provide a duct joint capable of connecting an exhaust duct in a direction of a desired angle with respect to a connecting exhaust port of a range hood.

According to the present invention, it is possible to provide a duct joint in which an exhaust duct can be connected in a direction of a desired angle with respect to a connection exhaust port of a range hood.

FIG. 1 shows a vertical cross-sectional view of a duct joint according to the present embodiment. FIG. 2 shows a cross-sectional view of the duct joint according to the present embodiment. FIG. 3 shows another vertical cross-sectional view of the duct joint according to the present embodiment. FIG. 4 shows a plan view when the duct joint according to the present embodiment is connected to the connection exhaust port of the exhaust duct and the range hood. FIG. 5 shows a cross-sectional view when the duct joint according to the present embodiment is connected to the connection exhaust port of the exhaust duct and the range hood. FIG. 6 shows a comparison of vertical cross-sectional views when the connection directions of the duct joints according to the present embodiment are exchanged. FIG. 7 shows a comparison of vertical cross-sectional views when the duct joint according to the present embodiment is covered with a heat insulating material.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. It should be noted that this is only an example, and the technical scope of the present invention is not limited to this.
[Composition of duct joint]
FIG. 1 shows a vertical cross-sectional view of the duct joint 1 according to the present embodiment.
FIG. 2 shows a cross-sectional view of the duct joint 1 according to the present embodiment.
FIG. 3 shows another vertical cross-sectional view of the duct joint 1 according to the present embodiment.
FIG. 4 shows a plan view when the duct joint 1 according to the present embodiment is connected to the connection exhaust port 430 of the exhaust duct 240 and the range hood 420.
FIG. 5 shows a cross-sectional view when the duct joint 1 according to the present embodiment is connected to the connection exhaust port 430 of the exhaust duct 240 and the range hood 420.
FIG. 6 shows a comparison of vertical cross-sectional views when the connection directions of the duct joint 1 according to the present embodiment are exchanged.
FIG. 7 shows a comparison of vertical cross-sectional views when the duct joint 1 according to the present embodiment is covered with a heat insulating material.
Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 7.

As shown in FIGS. 1 to 5, the duct joint 1 has a first joint portion 10 having one end connected to the connection exhaust port 430 of the range hood 420 and the other end connecting to the second joint portion 20. It is composed of a second joint portion 20 having one end side connected to the first joint portion 10 and the other end side connected to the exhaust duct 240.

The first joint portion 10 includes a first tubular portion 100 and a first fitting portion 110.

The second joint portion 20 includes a second tubular portion 200 and a second fitting portion 210.

The first tubular portion 100 and the first fitting portion 110 are integrally molded. Further, the diameter of the first tubular portion 100 is smaller than the diameter of the first fitting portion 110.

The second tubular portion 200 and the second fitting portion 210 are integrally molded. Further, the diameter of the second tubular portion 200 is smaller than the diameter of the second fitting portion 210.

Further, as shown in FIG. 1, the maximum diameter of the first fitting portion 110 is configured to be slightly smaller (0.1 mm to 10 mm) than the maximum diameter of the second fitting portion 210. Then, the first joint portion 10 and the second joint portion 20 are connected to each other with the second fitting portion 210 covering the first fitting portion 110.

As shown in FIGS. 4 and 5, the duct joint 1 is used by connecting one end side (the first cylinder portion 100 side) to the connection exhaust port 430 of the range hood 420. Further, the other end side (second tubular portion 200 side) of the duct joint 1 is connected to the exhaust duct 240. The exhaust duct 240 and the connection exhaust port 430 of the range hood 420 are tubular ducts having a flow path inside.

The first tubular portion 100 and the second tubular portion 200 are portions that serve as the main body of the duct joint 1, and are made of a metal such as a galvanized iron plate having a thickness of 0.5 mm to 10 mm. The first tubular portion 100 and the second tubular portion 200 are cylinders having a diameter of 150 mm and a height of 60 to 100 mm. The diameter, height, and thickness of the first tubular portion 100 and the second tubular portion 200 are not particularly limited.

The first fitting portion 110 is integrally molded with the first tubular portion 100. The shape of the first fitting portion 110 is a shape hollowed out by two surfaces of a sphere having a radius of 89 mm, which face each other in parallel with the center of the sphere. That is, the first fitting portion 110 has two surfaces as openings that face each other in parallel with the center of the sphere. The radius of the first fitting portion 110 is not particularly limited to 89 mm, and may be, for example, 70 mm to 100 mm.

One end of the first fitting portion 110 is integrally joined with one end of the first tubular portion 100 by welding or the like. Further, the central axis of the first tubular portion 100 (the axis passing through the center of the cross section of the first tubular portion 100) and the central axis of the first fitting portion 110 (the cross section of the first fitting portion 110). Axis passing through the center of) coincides. That is, the first tubular portion 100 and the first fitting portion 110 share one central axis 120. The first joint portion 10 may be integrally molded with the mold.

The second fitting portion 210 is integrally molded with the second tubular portion 200. The shape of the second fitting portion 210 is a shape hollowed out by two surfaces of a sphere having a radius of 90 mm, which face each other in parallel with the center of the sphere. That is, the second fitting portion 210 has two surfaces as openings that face each other in parallel with the center of the sphere. The radius of the second fitting portion 210 is not particularly limited to 90 mm, but is slightly larger than the radius of the first fitting portion 110 (for example, 0.1 mm to 10 mm). The second joint portion 20 may be integrally molded with the mold. For example, the radius of the second fitting portion 210 may be 70 mm to 100 mm.

One end of the second fitting portion 210 is integrally joined with one end of the second tubular portion 200 by welding or the like. Further, the central axis of the second tubular portion 200 (the axis passing through the center of the cross section of the second tubular portion 200) and the central axis of the second fitting portion 210 (the cross section of the second fitting portion 210). Axis passing through the center of) coincides. That is, the second tubular portion 200 and the second fitting portion 210 share one central axis 220.

In the example shown in FIG. 1, the orthogonal axis 130 passing through the center of the sphere forming the shape of the first fitting portion 110 and orthogonal to the central axis 120 is the sphere forming the shape of the second fitting portion 210. It coincides with the orthogonal axis 230 that passes through the center and is orthogonal to the central axis 120.

As shown in FIG. 2, the first fitting portion 110 has a spherical shape that is extremely slightly smaller (for example, 0.1 mm to 10 mm) than the second fitting portion 210. Then, the first fitting portion 110 is inserted inside the second fitting portion 210. More specifically, the duct joint 1 has an end portion of a second tubular portion 210 facing the outer peripheral surface of the hemispherical first fitting portion 110 joined to the end portion of the first tubular portion 100. The hemispherical second fitting portion 210 to be joined to the inner peripheral surface of the second fitting portion 210 is pressed against each other to be fitted.

Further, the first fitting portion 110 is not fixedly joined to the second fitting portion 210. That is, the first fitting portion 110 is rotatably fitted to the second fitting portion 210 with the center of the sphere as a fulcrum.

As shown in FIG. 3, the first tubular portion 100 includes the central shaft 120 of the first tubular portion 100 and the first fitting portion 110, and the second tubular portion 200 and the second fitting portion 210. It can rotate until it has an inclination of an angle θ with and from the central axis 220 of the. The rotatable angle θ is, for example, 1 ° or more and 15 ° or less, but is not particularly limited and may be 1 ° or more and 30 ° or less.

In this way, by allowing the first tubular portion 100 to rotate by the angle θ with respect to the central axis 220 of the second tubular portion 200, the duct joint 1 becomes the second tubular portion 200. The connected exhaust duct 240 can be connected to the connection exhaust port 430 of the range hood 420 connected to the first tubular portion 100 in a direction of a desired angle θ.
[Composition of duct joint and range hood]
As shown in FIG. 4, the exhaust duct 240 is provided with a wall clearance 410 from the wall surface 400. The wall clearance 410 is determined to be an arbitrary value in consideration of the Fire Service Act and the circumstances of architectural design. At this time, since the position of the exhaust duct 240 is determined, the position to be joined with the connection exhaust port 430 of the range hood 420 is also determined within a predetermined range.

However, if the duct joint 1 is not rotatable, the exhaust duct 240 is joined to the connection exhaust port 430 by combining a well-known 90 ° elbow or a duct joint such as a 45 ° elbow. That is, it becomes necessary to arrange a large number of duct joints (45 ° elbow, 90 ° elbow, etc.), or to change the value of the wall clearance 410.

On the other hand, since the duct joint 1 has a rotatable structure, the exhaust duct 240 is joined to the connection exhaust port 430 without combining a well-known duct joint such as a 90 ° elbow or a 45 ° elbow. That is, by rotating the first fitting portion 110 of the duct joint 1 by a desired angle θ, the exhaust duct 240 and the connection exhaust port 430 can be directly joined, and the duct joint (45 ° elbow, 90 °) can be directly joined. There is no need to place an elbow, etc.), and there is no need to change the value of the wall clearance 410.

As shown in FIG. 5, the exhaust duct 240 is provided with a ceiling clearance 510 from the beam lower surface 500. The ceiling clearance 510 is determined to be an arbitrary value in consideration of the Fire Service Act and the circumstances of architectural design. At this time, since the position of the exhaust duct 240 is determined, the position to be joined with the connection exhaust port 430 of the range hood 420 is also determined within a predetermined range.

However, if the duct joint 1 is not rotatable, the exhaust duct 240 is joined to the connection exhaust port 430 by combining a well-known 90 ° elbow or a duct joint such as a 45 ° elbow. That is, it becomes necessary to arrange a large number of duct joints (45 ° elbow, 90 ° elbow, etc.), or to change the value of the ceiling clearance 510.

On the other hand, since the duct joint 1 has a rotatable structure, the exhaust duct 240 is joined to the connection exhaust port 430 without combining a well-known duct joint such as a 90 ° elbow or a 45 ° elbow. That is, by rotating the first fitting portion 110 of the duct joint 1 by a desired angle θ, the exhaust duct 240 and the connection exhaust port 430 can be directly joined, and the joint duct joint (45 ° elbow, 90) can be directly joined. There is no need to place a ° elbow, etc.), and there is no need to change the value of the ceiling clearance 510.
[Duct fitting connection direction]
FIG. 6 shows a comparison of vertical cross-sectional views when the connection directions of the duct joint 1 according to the present embodiment are exchanged.

Since the first joint portion 10 is connected to the connection exhaust port 430 of the range hood 420, the exhaust 610 is the first joint portion 10, that is, the first tubular portion, as shown in FIG. 6 (a). It is discharged from 100 through the first fitting member 110, through the second joint portion 20, that is, from the second fitting member 210 through the second tubular portion 200, in the direction of the exhaust duct 240.

By the way, in the joint 1, the first fitting member 110 is smaller than the second fitting member 210 in the crimping portion due to the fitting of the first fitting member 110 and the second fitting member 210. An internal step 600 is generated by the thickness of the first fitting member 110.

As shown in FIG. 6A, the exhaust 610 is discharged in the direction in which the diameter increases at the portion of the internal step 600, so that the exhaust 610 is not affected by the resistance due to the internal step 600.

On the other hand, if, as shown in FIG. 6B, the second joint portion 20 is connected to the connection exhaust port 430 of the range hood 420, the exhaust 620 is the second joint portion 20, that is, the second joint portion 20, that is, the second joint portion 20. From the tubular portion 200 to the second fitting member 210, and from the first joint portion 10, that is, from the first fitting member 110 to the first tubular portion 100, the exhaust gas is discharged in the direction of the exhaust duct 240. ..

At this time, as shown in FIG. 6B, the exhaust 620 is discharged in the direction in which the diameter is narrowed at the portion of the internal step 600, and therefore receives resistance due to the internal step 600. That is, the exhaust 620 may change the flow of exhaust gas due to the internal step 600, or may enter the gap between the first fitting member 110 and the second fitting member 210 and leak to the outside of the joint 1. is there.

Therefore, as shown in FIG. 6A, the first joint portion 10 is connected to the connection exhaust port 430 of the range hood 420, and the first joint portion 10, that is, the first tubular portion 100 to the first The exhaust 610 is discharged from the second fitting member 20, that is, the second fitting member 210, through the second tubular portion 200, and through the fitting member 110, to the exhaust duct 240, whereby the joint 1 is formed. , Exhaust from the range hood 420 can be performed without resistance or external leakage.
[When covered with heat insulating material]
FIG. 7 shows a comparison of vertical cross-sectional views when the duct joint 1 according to the present embodiment is covered with a heat insulating material.

As shown in FIG. 7A, when the first tubular portion 100 is coated with the general general heat insulating material 700, the diameter of the first tubular portion 100 is 150 mm, and the thickness of the general heat insulating material 700 is large. For example, since it is 20 mm, the diameter of the first tubular portion 100 covered is 190 mm. In this case, the diameter of the connection exhaust port 430 or the exhaust duct 240 is 150 mm, which is a general diameter.

That is, since the diameter of the first tubular portion 100 covered is 190 mm, it can be connected to a general connection exhaust port 430 or an exhaust duct 240 coated with a general heat insulating material 700 without a step.

As shown in FIG. 7B, when the first fitting material 110, the second tubular portion 200, and the second fitting material 210 are coated with the special heat insulating material 710, the first fitting material 110 Alternatively, since the maximum diameter of the second fitting material 210 is 180 mm, the diameter of the second tubular portion 200 is 150 mm, and the thickness of the special heat insulating material 710 is 5 mm, the first fitting material coated is covered. The diameter of the maximum portion of the 110, the second tubular portion 200, and the second fitting member 210 is 190 mm.

That is, since the diameter of the maximum portion of the coated first fitting member 110, the second tubular portion 200, and the second fitting member 210 is 190 mm, it is generally used in a general connection exhaust port 430 or an exhaust duct 240. It can be connected to the one coated with the heat insulating material 700 without a step.

Therefore, the diameters of the maximum portions of the general connection exhaust port 430 or the exhaust duct 240 coated with the general heat insulating material 700 and the joint 1 coated with the special heat insulating material 710 are the same, and the joint 1 is general. Since it can be connected to the connection exhaust port 430 and the exhaust duct 240 without a step, the joint 1 can easily finely adjust the exhaust path on the ceiling or the wall.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments described above. In addition, the effects described in the embodiments of the present invention merely list the most preferable effects arising from the present invention, and the effects according to the present invention are limited to those described in the embodiments of the present invention. is not it.

Further, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations. Further, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. .. In addition, other configurations may be added, deleted, or replaced with respect to a part of the configurations of each embodiment.

1 Duct joint 10 First joint part 20 Second joint part 100 First cylinder part 110 First fitting material 120 Center axis 130 Orthogonal axis 200 Second cylinder part 210 Second fitting material 220 Center Axis 230 Orthogonal Axis 240 Exhaust Duct 400 Wall 410 Wall Clearance 420 Range Hood 430 Connection Exhaust Port 500 Beam Bottom 510 Ceiling Clearance 600 Internal Step 610 Exhaust 620 Exhaust 700 General Insulation 710 Special Insulation

Claims (4)

A duct joint that connects one end to a tubular exhaust duct that has a flow path inside and the other end to the connection exhaust port of the range hood.
It consists of a first tubular portion, a first fitting material, a second tubular portion, and a second fitting material.
The hemispherical outer peripheral surface of the first fitting member joined to the end portion of the first tubular portion and the hemispherical second tubular portion joined to the end portion of the second tubular portion facing the outer peripheral surface. It is fitted by pressing the inner peripheral surfaces of the fitting material against each other.
Duct fittings. The first fitting material is rotatably fitted to the second fitting material with the center of the sphere as a fulcrum.
The duct joint according to claim 1. One end of the first tubular portion is connected to the connection exhaust port of the range hood, the other end of the first tubular portion is connected to the first fitting material, and one end of the second tubular portion exhausts. It is connected to the duct, and the other end of the second tubular portion is connected to the second fitting material.
The duct joint according to claim 1. A heat insulating material having a maximum diameter of 180 mm and a diameter of the first tubular portion or the second tubular portion of 150 mm and a thickness of 5 mm. The diameter of the maximum portion of the first fitting material and the second fitting material coated with the above is 190 mm.
The duct joint according to claim 1.

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