JP2021032457A - Flexible joint for duct - Google Patents

Abstract

To provide a flexible joint for a duct capable of preventing a canvas from lowering by the self-weight with a simple structure using a belt, and facilitating construction.SOLUTION: A flexible joint 1 for a duct includes a flexible canvas 10, frame-shaped flanges 20 attached to both end portions of the canvas 10 for connection to the duct, a suspension pipe 30 for suspending the canvas 10, brackets 40 respectively provided on the flanges 20 for supporting the suspension pipe 30, and a belt 50 that lifts the canvas 10 from a lower portion and suspending it on the suspension pipe 30. The suspension pipe 30 is supported by each bracket 40, and the canvas 10 is supported by the suspension pipe 30 through the belt 50.SELECTED DRAWING: Figure 1

Description

According to the present invention, when a duct arranged for the purpose of air conditioning, smoke exhaust, kitchen, etc. in a building such as a building receives vibration such as an earthquake, the duct is contained in the duct so as to prevent damage to the duct as much as possible. Concerning flexible joints for ducts to be interposed.

In recent years, the damage caused by the collapse of buildings due to large earthquakes has increased rapidly, and seismic isolation of buildings has become a major issue. Various ducts that are arranged inside buildings such as buildings for the purpose of air conditioning, smoke exhaust, etc. are made by processing steel plates, etc. into pipes with a circular or rectangular cross section, and connecting these continuously to the ceiling of the building. Since it is a rigid structure that is fixed along the wall without loosening, there is no problem if the building and the duct sway in the same direction when receiving a huge tremor caused by an earthquake etc., but with the building If the duct sways in a different direction, a load is applied to the duct, and the connection portion of the duct may be damaged and the original function may be impaired.

Therefore, a canvas having elasticity and flexibility and a hanging rod for suspending the canvas are provided, and brackets for supporting the hanging rod are provided at both ends of the canvas to suspend the canvas from the hanging rod. A deflection for a duct in which a hanging portion is provided at at least one place in the middle portion of the canvas, the hanging portion is a projecting piece provided on the outer peripheral portion of the canvas, and a through hole for loosely inserting a hanging rod is provided in the projecting piece. Joints have been proposed (see, for example, Patent Document 1).

In this way, when installing a seismic isolation canvas or a flexible joint with a long overall length of the canvas in a horizontal state, how to hang it from the heavens in the middle of the canvas so that the intermediate position does not drop downward due to its own weight? Exists. For example, as far as seismic isolation canvas is concerned, the most commonly constructed work is to provide a triangular hanging part mainly on the top of the canvas (see Fig. 5) and weld it to the flanges connected to both ends of the canvas. There is a method that uses a guide to pass a hanging part through a pipe that straddles both ends to prevent the canvas from falling downward due to its own weight.

Japanese Unexamined Patent Publication No. 2006-336892

By the way, in such a method, there are many types in which the hanging part is directly attached to the canvas by sewing or the like, but depending on the canvas, sewing may not be possible. In that case, the hanging part is bonded. However, the weight of the canvas may cause it to peel off and fall off.

The present invention has been made in view of such circumstances, and provides a flexible joint for a duct, which has a simple structure using a belt, can prevent the canvas from lowering due to its own weight, and is easy to construct. The purpose is to do.

In order to solve the above problems and achieve the object, the present invention is configured as follows.

The invention according to claim 1 comprises a flexible canvas and a flexible canvas.
Frame-shaped flanges attached to both ends of the canvas for connection with the duct,
A hanging pipe for hanging the canvas,
Brackets provided on each of the flanges to support the suspension pipe,
Includes a belt for lifting the canvas from below and suspending it from the suspension pipe.
The suspension pipe is supported by each of the brackets.
The canvas is a flexible joint for a duct, characterized in that it is supported by the suspension pipe via the belt.

In the invention according to claim 2, the belt is
Cover both sides from the bottom of the canvas
One end is wrapped around the hanging pipe, folded back, and mounted on the belt at the upper part of one side surface of the canvas via a hook-and-loop fastener.
The flexible joint for a duct according to claim 1, wherein the other end is wound around the suspension pipe, folded back, and mounted on the belt via a hook-and-loop fastener at the upper portion of the other side surface of the canvas. Is.

In the invention according to claim 3, the belt is
Cover both sides from the bottom of the canvas
One end is attached to the other side of the belt at the position of the suspension pipe so as to be overlapped with the belt via a hook-and-loop fastener.
The other side of the belt extends from the position of the suspension pipe to the other side of the canvas.
The flexible joint for a duct according to claim 1, wherein the other end portion is attached to the upper part of the other side surface of the canvas so as to be overlapped with the belt via a hook-and-loop fastener.

In the invention according to claim 4, the belt is
Cover both sides from the bottom of the canvas
One end and the other end are mounted on the belt at the position of the suspension pipe via a hook-and-loop fastener.
The flexible joint for a duct according to claim 1, wherein the one end portion and the other end portion are each held by a holding member on the belt.

With the above configuration, the present invention has the following effects.

The invention according to claim 1 includes a flexible canvas, a frame-shaped flange, a suspension pipe, brackets provided on each of the flanges, and a belt for suspending the suspension pipe. Is supported by each bracket, and the canvas is supported by the suspension pipe via a belt. With a simple structure using a belt, the canvas can be prevented from falling downward due to its own weight, and Easy to install.

In the invention according to claim 2 to 4, the belt can be easily and securely attached to the belt by covering both side surfaces from the lower part of the canvas and stacking the belt on the belt via a hook-and-loop fastener.

It is a figure which shows the flexible joint for a duct of Embodiment 1. FIG. It is a figure which shows the flexible joint for duct of Embodiment 2. It is a figure which shows the flexible joint for duct of Embodiment 3. It is a figure which shows the bending joint for a conventional duct.

Hereinafter, embodiments of the flexible joint for ducts of the present invention will be described. Embodiments of the present invention represent the most preferred form of the invention, and the invention is not limited thereto.

(Embodiment 1)
The flexible joint for the duct of the first embodiment will be described with reference to FIG. The duct flexor joint 1 of the first embodiment is interposed between metal ducts fixed to a building (not shown), and absorbs the displacement due to the shaking when a shaking such as an earthquake occurs. Avoid the effects of shaking on rigid ducts as much as possible.

The flexible joint 1 for a duct is for suspending a flexible canvas 10 formed in a circular or rectangular cross section, frame-shaped flanges 20 attached to both ends of the canvas 10 for connection with the duct, and the canvas 10. Includes a suspension pipe 30 of the above, brackets 40 provided on each of the flanges 20 for supporting the suspension pipe 30, and a belt 50 for lifting the canvas 10 from below and suspending it from the suspension pipe 30.

The canvas 10 has a flexible structure having elasticity and flexibility. For example, a nonflammable cloth whose surface is heat-resistant such as aluminum foil, or synthetic fibers such as polyester fibers such as vinyl chloride or olefin resin are used. A cloth called tarpaulin coated with rubber or a cloth coated with the same resin or rubber on glass fiber is formed into a tubular shape with a rectangular cross section, and a metal core material for reinforcement is arranged at equal pitches on this cloth. By doing so, it can be expanded and contracted or bent like a bellows.

The flange 20 is a metal member fixed to both ends of the canvas 10 to connect the duct, and a plate-shaped bracket 40 is projected from the center of the upper portion of each flange 20.

In the first embodiment, the suspension pipe 30 is a metal member and is supported by the respective brackets 40, and the canvas 10 is supported by the suspension pipe 30 via the belt 50.

The belt 50 is molded of a heat-resistant resin, and examples of the heat-resistant resin include polyethersulfone (PES), polyphenylene sulfide (PPS), liquid crystal polymer (LCP), polyethernitrile (PEN), and polyimide (PES). In addition to general heat-resistant resins such as PI), polyamideimide (PAI), polyetheretherketone (PEEK) and polyethylene terephthalate (PET), composite materials made of these resins and glass fibers, metals, ceramics, etc. Can be used.

In the configuration in which the canvas 10 of this embodiment is supported by the suspension pipe 30, the belt 50 covers both side surfaces 10b from the lower portion 10a of the canvas 10, and one end portion 50a is wound around the suspension pipe 30 and folded back. At the upper part of one side surface of the canvas 10, it is mounted on the belt 50 via the hook-and-loop fastener 60, the other end 50b is wrapped around the suspension pipe 30 and folded back, and the hook-and-loop fastener 61 is attached at the upper part of the other side surface of the canvas 10. It is mounted on the belt 50 via the above.

In this embodiment, the belt 50 has one end 50a and the other end 50b mounted on the belt 50 by hook-and-loop fasteners 60 and 61 on one side surface upper portion of the canvas 10 and the other side surface upper portion. The surface fasteners 60 and 61 are in a stacked state, and sufficient surface bonding strength can be ensured.

The concentrated load applied to the belt 50 can be reliably received at the position of the suspension pipe 30 and the upper part of the side surface of the canvas 10, and the simple configuration using the belt 50 prevents the canvas 10 from falling downward due to its own weight. can do.

Further, the belt 50 has a structure of being superposed on the belt 50 by the hook-and-loop fasteners 60 and 61, and is used for the hook-and-loop fasteners 60 and 61 installed on the belt 50. For example, it is easy to make fine adjustments in the range where the lower part is lowered by its own weight.

(Embodiment 2)
The flexible joint for the duct of the second embodiment will be described with reference to FIG. The duct flexure joint 1 of the second embodiment has the same configuration as that of the first embodiment and has the same reference numerals, and the description thereof will be omitted.

In the configuration in which the canvas 10 of this embodiment is supported by the suspension pipe 30, the belt 50 covers both side surfaces 10b from the lower portion 10a of the canvas 10, and one end 50a is placed at the position of the suspension pipe 30. Attached to the other side by overlapping with the belt 50 via the hook-and-loop fastener 62, the other side of the belt extends from the position of the suspension pipe 30 to the other side of the canvas 10, and the other end 50b is attached to the upper portion of the other side surface of the canvas 10. , It is mounted on the belt 50 via the hook-and-loop fastener 63.

In this embodiment, the belt 50 has one end 50a at the position of the suspension pipe 30 and the other end 50b at the upper part of the other side surface of the canvas 10 via hook-and-loop fasteners 62 and 63. The surface fasteners 62 and 63 are stacked on top of each other, and sufficient surface bonding strength can be ensured.

The concentrated load applied to the belt 50 can be reliably received at the position of the suspension pipe 30 and the upper part of the side surface of the canvas 10, and the simple configuration using the belt 50 prevents the canvas 10 from being lowered by its own weight. be able to.

(Embodiment 3)
The flexible joint for the duct of the third embodiment will be described with reference to FIG. The duct flexure joint 1 of the second embodiment has the same configuration as that of the first embodiment and has the same reference numerals, and the description thereof will be omitted.

In the configuration in which the canvas 10 of this embodiment is supported by the suspension pipe 30, the belt 50 covers both side surfaces 10b from the lower portion 10a of the canvas 10 and suspends one end 50a and the other end 50b. At the position of the pipe 30, it is mounted on the belt 50 via the hook-and-loop fastener 64, and one end 50a and the other end 50b are held by the holding members 71 and 72 on the belt 50, respectively.

The holding members 71 and 72 function to more reliably hold one end 50a and the other end 50b to the belt 50 by using, for example, a clip or a belt, and the surface fasteners 64 are overlapped with each other. Yes, sufficient surface bonding strength can be secured.

In this embodiment, the belt 50 has one end 50a and the other end 50b superposed on the belt 50 via the hook-and-loop fastener 64 at the position of the suspension pipe 30, and the hook-and-loop fastener 64 is superposed. It is in a state of being in a state of being in a state of being able to secure sufficient surface bonding strength.

The concentrated load applied to the belt 50 can be reliably received at the position of the suspension pipe 30, and the simple configuration using the belt 50 can prevent the canvas 10 from being lowered by its own weight.

According to the present invention, when a duct arranged for the purpose of air conditioning, smoke exhaust, kitchen, etc. in a building such as a building receives vibration such as an earthquake, the duct is contained in the duct so as to prevent damage to the duct as much as possible. It is applied to the flexible joint for the duct to be interposed, and with a simple configuration using a belt, it is possible to prevent the canvas from falling downward due to its own weight, and the construction is easy.

1 Flexible joint for duct 10 Canvas 10a Lower part of canvas 10 10b Both sides of canvas 10 20 Flange 30 Suspended pipe 40 Bracket 50 Belt 50a One end 50b The other end 60, 61, 62, 63, 64 Hook-and-loop fastener 71, 72 Holding member

Claims (4)

With a flexible canvas
Frame-shaped flanges attached to both ends of the canvas for connection with the duct,
A hanging pipe for hanging the canvas,
Brackets provided on each of the flanges to support the suspension pipe,
Includes a belt for lifting the canvas from below and suspending it from the suspension pipe.
The suspension pipe is supported by each of the brackets.
The flexible joint for a duct is characterized in that the canvas is supported by the suspension pipe via the belt. The belt is
Cover both sides from the bottom of the canvas
One end is wrapped around the hanging pipe, folded back, and mounted on the belt at the upper part of one side surface of the canvas via a hook-and-loop fastener.
The flexible joint for a duct according to claim 1, wherein the other end is wound around the suspension pipe, folded back, and mounted on the belt via a hook-and-loop fastener at the upper portion of the other side surface of the canvas. .. The belt is
Cover both sides from the bottom of the canvas
One end is attached to the other side of the belt at the position of the suspension pipe so as to be overlapped with the belt via a hook-and-loop fastener.
The other side of the belt extends from the position of the suspension pipe to the other side of the canvas.
The flexible joint for a duct according to claim 1, wherein the other end portion is attached to the upper part of the other side surface of the canvas so as to be overlapped with the belt via a hook-and-loop fastener. The belt is
Cover both sides from the bottom of the canvas
One end and the other end are mounted on the belt at the position of the suspension pipe via a hook-and-loop fastener.
The flexible joint for a duct according to claim 1, wherein the one end portion and the other end portion are each held by a holding member on the belt.