JPH0518482A - Joint for duct - Google Patents

Abstract

PURPOSE:To transport and store duct joints effectively by performing easily the fitting and removing works of a joint to/from ducts. CONSTITUTION:One end of No.1 cylindrical joint body 16 is fixed to the connecting end of one of the ducts 11 to be connected together, while one end of No.2 cylindrical joint body 16 is fixed to the connecting end of the other duct 11 in such an arrangement that a gap for absorbing dislocation of ducts is formed between the other ends of these two joint bodies 16. A connection band 18 is enwrapped on the two joint bodies 16 in such a way as straddling over them. A clamp 19 is fitted removably on each outside edge of the connection band 18. A protection band 21 having a width enough to cover the gap for absorbing dislocation is attached to the center of the connection band 18 inner surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint used for connecting ducts of air conditioning and ventilation equipment.

[0002]

2. Description of the Related Art As a joint of this kind, as shown in FIG. 9, a tubular body (33) with flanges (32) at both ends interposed between two ducts (31) to be connected is used. It is known that (33) is formed of canvas cloth in a bellows shape and has a piano wire (34) embedded therein.

[0003]

The above-mentioned joint has the following problems. First, since the cylindrical body (33) is integrally molded and cannot be divided, it is difficult to mount and dismount, and since it is bulky, it requires a large space for transportation and storage, which is not efficient. Second, if the two ducts (31) to be connected are misaligned, it is difficult to mount. Also,
In such a case, the tubular body (33) is often forcibly attached to the duct (31), which causes leakage or the tubular body (33) is easily broken. Third, since the shape of the cylindrical body (33) is not slim, turbulence is likely to occur.

An object of the present invention is to provide a duct joint that solves the above problems.

[0005]

A duct joint according to the present invention has one end of a first tubular joint main body attached to the connecting end of one duct to be connected and the connecting end of the other duct to be connected. One end of the second tubular joint main body is attached so as to form a gap for absorbing the displacement of the duct between the other ends of both joint main bodies, and a connecting band is wound around the outer surfaces of both joint main bodies so as to straddle them. Clamps are detachably fitted to both edges of the outer surface of the band, and a protective band having a width capable of covering the duct position deviation absorbing gap is attached to the central part of the inner surface of the connection band.

[0006]

In the duct joint according to the present invention, one end of the first tubular joint body is attached to the connecting end of one duct to be connected, and the second tubular joint body is connected to the connecting end of the other duct to be connected. Since one end of the joint body is installed so as to form a gap for absorbing the displacement of the duct between the other ends of both joint bodies, even if the duct is displaced, the joint body of both joint bodies to be connected should be connected. There is no problem in mounting.

Further, the connection band is wound on the outer surfaces of both joint bodies so as to extend over them, and the clamps are detachably fitted to both edges of the outer surface of the connection band. If you rewind, the joint body,
All parts of the connecting strips and clamps fall apart.

Further, since the protective band having a width capable of covering the duct position deviation absorbing gap is attached to the central portion of the inner surface of the connecting band, the connecting band does not come into contact with the end of the joint body.

[0009]

Embodiments of the present invention will be described below with reference to FIGS.

The joint according to the present invention includes one for negative pressure and one for positive pressure. First, the joint for negative pressure will be described.

Referring to FIG. 2, left and right negative pressure ducts (11) to be connected are aligned in a straight line with their connecting ends facing each other and spaced from each other.

Referring to FIGS. 1 and 2, both ducts (1
The first connection ring (13) with left and right flanges (12) is attached to the outer surface of the connection end of 1). Both first connecting rings (13) have second connecting rings (15) with left and right flanges (14)
Are installed respectively. The base parts of the left and right tubular joint bodies (16) are fitted into the second connecting rings (15) and are fixed by rivets (17). Both joint bodies (1
A gap for absorbing the displacement of the duct is formed between the tips of 6). The base of both joint bodies (16) has a bent engagement flange (16a).
Are formed respectively. On the outer surface of both joint bodies (16),
A connecting band (18) is wound so as to extend over these. Clamps (19) are detachably attached to both outer edges of the connection band (18). A protective band (21) is attached to the center of the inner surface of the connection band (18).

The flanges (1) of the second connecting rings (15)
A set bolt (22) is attached to 4), but this is removed after setting.

The joint body (16) is made of zinc-plated steel sheet having a thickness of about 1 mm. The connecting band (18) is made of nylon tarpaulin, i.e. canvas with waterproof treatment on both sides.
It has a length slightly longer than the outer peripheral length of (16). Connection band (1
The engaging side of the hook-and-loop fastener (23) is attached to one inner surface of both ends of 8), and the engaged side of the hook-and-loop fastener (24) is attached to the other outer surface. The clamp (19) is of the winding type,
Prevent the connection band (18) from falling off. The protective band (21) has a thickness of 0.
It is made of a stainless steel plate of about 5 mm and formed in a flat plate shape. The length of the protection band (21) is almost equal to that of the connection band (18), and the width of the protection band (21) is narrower than that of the connection band (18), but the duct position deviation absorbing gap is covered with a margin. It is possible size. As shown in detail in FIG. 3, a stainless steel cover plate (25) is arranged at a proper position in the center of the outer surface of the connection band (18), and a protection band (21) is fixed to these with a rivet (26). Thus, the protection band (21) is attached to the connection band (18).

When transporting and storing the joint, especially the connection band (18)
As shown in FIG. 8, it is convenient not to make it bulky by winding it in a coil with the protective band (21) attached.

FIG. 3 is an enlarged view of a part of FIG. 2. In this case, the operation of the air conditioning equipment is stopped,
The duct (11) is not under negative pressure. Therefore, the connection band (1
8) bulges slightly outward. When the operation of the air conditioning equipment is started and the inside of the duct (11) becomes a negative pressure, the connecting band (18) is sucked and superposed on the protective band (21) as shown in FIG.

Next, referring to FIGS. 5 to 7, the positive pressure joint will be described.
One thin film sheet-like sealing member (27) is added. The two seal members (27) are arranged on both sides of the protective band (21), the tip of each seal member (27) is the outer surface of the joint body (16), and the middle part is the edge of the protective band (21). The base end portion of each seal member (27) is fixed to the inner surface of the connection band (18) in a state of being brought into contact with the respective portions. FIGS. 6 and 7 correspond to FIGS. 3 and 4, and show the operation stop and the operation of the air conditioning equipment, respectively.

[0018]

According to the present invention, even if the ducts are misaligned, there is no problem in attaching the joint body to both ducts to be connected, so that no excessive force acts on the joint body. There is no risk of leakage between the duct and the joint body.

Further, when the clamp is removed and the connection band is rewound, all the members of the joint body, the connection band and the clamp are separated, so that the fitting and removal work of the joint to the duct can be easily carried out. The joint can be efficiently transported and stored.

Further, since the connecting band does not come into contact with the end portion of the joint body, there is no fear of breaking the connecting band.

[Brief description of drawings]

1 is an exploded perspective view of an apparatus according to the present invention.

FIG. 2 is a vertical longitudinal sectional view of the same device.

FIG. 3 is a cross-sectional view showing a part of FIG. 2 in an enlarged manner, showing a state when the operation of the air conditioning equipment is stopped.

FIG. 4 is a cross-sectional view showing the same portion as FIG. 3 and shows a state during operation of the air conditioning equipment.

FIG. 5 is a cross-sectional view corresponding to FIG. 1 showing another embodiment.

FIG. 6 is a cross-sectional view showing a part of FIG. 5 in an enlarged manner, showing a state when the operation of the air conditioning equipment is stopped.

FIG. 7 is a cross-sectional view showing the same portion as FIG. 6, showing a state during operation of the air conditioning equipment.

FIG. 8 is a perspective view of a connection band and a protection band.

FIG. 9 is a vertical longitudinal sectional view showing a conventional zero.

[Explanation of symbols]

 11 Duct 16 Fitting body 18 Connection band 19 Clamp 21 Protective band

Claims (1)

Claims: 1. One end of a first tubular joint body (16) is attached to a connecting end of one duct (11) to be connected,
One end of the second tubular joint main body (16) is attached to the connection end of the other duct (11) to be connected so as to form a duct position deviation absorbing gap between the other ends of both joint main bodies (16). The connection band (18) is wound around the outer surfaces of both joint bodies (16) so as to straddle them, and the clamps (19) are detachably fixed to the outer edges of the connection band (18). A duct joint in which a protective band (21) having a width capable of covering the gap for absorbing the displacement of the duct is attached to the center of the inner surface of (18).