JPH0638274Y2 - Lifting type telescopic duct device - Google Patents

Description

[Detailed Description of the Invention] Industrial field of application The present invention relates to a lifting type telescopic duct device, and more specifically,
For example, the present invention relates to an elevating type telescopic duct device used for ventilation and the like in a coating facility for a large structure such as an aircraft.

2. Description of the Related Art For example, in an aircraft coating facility, an enclosure that encloses a portion to be coated with a sheet or the like is provided, and in order to perform ventilation by sucking and discharging coating mist or solvent vapor,
The duct is connected.

By the way, since such a duct hinders the movement of the aircraft, it is removed at the time of loading and unloading the aircraft, and it is installed at a predetermined position after the loading of the aircraft, but the removal and installation work of this duct is troublesome. There is a problem.

An object of the present invention is to provide a lifting type telescopic duct device that solves the above problems.

Means for Solving the Problems An elevator type telescopic duct device according to the present invention is a bellows-shaped telescopic duct having an upper end fixedly connected to another upper duct and a lower end removably connected to another lower duct. And a hoisting means arranged above the upper duct, one hoisting cord drawn from the hoisting means and passed through the upper duct to the center of the telescopic duct, and 3 of the lower end of the telescopic duct. Connection rigging that connects more than one point to the lower end of the hoisting rig, and both ends are fixed to the upper end of the upper duct or telescopic duct and the lower end of the telescopic duct to limit expansion of the telescopic duct. And a fixing means for fixing the lower end portion of the expansion duct to the lower duct when the extension duct is connected to the lower duct.

In this specification, the term "rigging" is used to mean all cords such as wires (wire ropes) and chains.

Preferably, the expansion duct has non-combustibility and electrical conductivity,
The hoisting cord and the connecting cord are made of metal, and the expansion duct is grounded through the connecting cord and the hoisting cord.

Further, preferably, the bellows sheet forming the expansion duct is a sheet made of carbon fiber with aluminum vapor-deposited on both sides, and is sewn using a thread made of stainless steel.

By unwinding the hoisting cord of the hoisting means, the telescopic duct extends downward by its own weight, and its lower end is connected to the lower duct. At this time, the extension restriction cord prevents the extension duct from overextending. Then, by fixing the lower end of the telescopic duct to the lower duct by the fixing means, the upper duct and the lower duct are connected by the telescopic duct, and can be used for ventilation or the like.

After the fixing of the lower duct and the telescopic duct by the fixing means is released, the hoisting means winds the hoisting cord, whereby the lower end of the telescopic duct is lifted apart from the lower duct. The telescopic duct is stored under the upper duct in a contracted state. Therefore, a space is created between the expandable duct and the lower duct, and the object to be coated can be moved through this space.

A carbon fiber sheet having aluminum vapor-deposited on both sides and stitched with a stainless steel thread is nonflammable and has electrical conductivity. Therefore, when this is used for the bellows sheet, the expansion duct becomes non-combustible and electrically conductive.

If the non-flammable and electrically conductive telescopic duct is grounded through the metal connecting rigging and hoisting rigging, the telescopic duct is prevented from being electrified and is non-flammable, so it is safe. Becomes higher.

Embodiment An embodiment in which the present invention is applied to an aircraft painting facility will be described below with reference to the drawings.

In Fig. 1 showing a part of a painting facility, an elongate telescopic duct (4) of an elevating telescopic duct device (3) is arranged between an upper duct (1) and a lower duct (2), and an upper end portion thereof is an upper duct. It is fixed to the lower surface of (1). Although illustration is omitted, the upper duct (1) is fixedly arranged on the upper part of the facility by a suitable beam or the like. The lower duct (2)
It is fixedly installed on the floor (5) of the facility. In addition,
The upper and lower ducts (1) and (2), especially the lower duct (2),
It may be mobile. Further, the upper and lower ducts (1) and (2) may be connected to another duct as a connection unit. A beam (6) is arranged above the upper duct (1), and an electric winch (hoisting means) (8) is attached to a column (7) fixed to the beam (6). The winch (8) can be remotely operated from the floor (5), for example, a wireless type operated by a radio transmitter and a receiver at FM frequency. One stainless steel hoist wire (9) for winch (8)
Is hung on a plurality of sheaves (10) (11) attached to the beam (6) and then passed through a wire guide pipe (33) that vertically penetrates the upper duct (1), and then the center of the telescopic duct (4) is reached. , And three or more stainless steel connecting wires (12) connected to the lower end thereof are connected to the lower end of the telescopic duct (4). Then, the winch (8) pays out and winds the hoisting wire (9), whereby the telescopic duct (4) is telescopically expanded. In FIG. 1, the retractable duct (4) in a contracted state is shown by a solid line, and the retractable duct (4) in an expanded state is shown by a chain line.

As shown in FIG. 2, FIG. 4, FIG. 6 and FIG. 7, a short cylindrical portion (2a) perpendicular to the upper surface of the lower duct (2) is formed, and a flange (13a) is formed around the upper end opening. The connecting ring (13) having the above () is fixed. Positioning holes (14) are formed in, for example, two places that equally divide the flange (13a) of the connecting ring (13) in the circumferential direction. Further, magnet attraction plates (15) are fixed via support brackets (16) at, for example, three locations that equally divide the outer peripheral edge of the flange (13a) in the circumferential direction.

As shown in FIG. 2, FIG. 3, FIG. 5, FIG. 6, and FIG. 7, the flanges (18a) (inside the upper and lower ends of the bellows sheet (17) constituting the expansion duct (4) ( The connecting ring (18) (19) with 19a) is fitted and the bellows sheet (17)
It is fixed by a fixing band (20) (21) wound from the outside and a screw (not shown). The upper coupling ring (18) is fixed around the opening on the lower surface of the upper duct (1) via the conductive sheet (34). The wire fixing fittings (22) are fixed to, for example, six positions that equally divide the flange (18a) of the upper connecting ring (18) in the circumferential direction. Also on the flange (19a) of the lower connecting ring (19),
The same number of wire fixing fittings (23) corresponding to these are fixed. Flange (19a) of lower connecting ring (19)
In addition, a magnet mounting plate (24) is fixed in an outwardly protruding shape corresponding to the magnet attraction plate (15) of the connecting ring (13) of the lower duct (2). For example, a fixing device (fixing means) (25) using a magnet base that is switched between an attracting state and a non-attracting state by turning a switch on and off is attached. The lower surface of the flange (19a) of the lower connecting ring (19) is provided with a positioning projection (26) corresponding to the positioning hole (14) of the connecting ring (13) of the lower duct (2). In addition, the wire fixing metal fittings (27) are fixed to, for example, three places that equally divide the inner surface of the lower connecting ring (19) in the circumferential direction, and one end of each of the metal fittings (27) is fixed to the connecting wire (12). The other end is connected to the lower end (9a) of the hoisting wire (9).

The bellows sheet (17) of the expansion duct (4) is nonflammable and has electrical conductivity. As such a sheet, for example, a sheet in which aluminum is vapor-deposited on both sides of a carbon fiber sheet and which is sewn using a thread made of stainless steel is used. Note that this sheet can also be used as the above-mentioned conductive sheet (34). As shown in FIGS. 2, 5, and 6, a plurality of upper and lower intermediate rings (28) are fixed in the bellows sheet (17) at equal intervals. To reduce the weight, these intermediate rings (28) are made of, for example, a drawn aluminum pipe, and are fixed by a fixing band (29) wound from the outside of the bellows sheet (17) and a plurality of screws (30). Each fixed band (29)
The wire insertion metal fittings (31) corresponding to the wire fixing metal fittings (22) (23) of the upper and lower connecting rings (18) (19) are fixed to the outer peripheral surface of the, and both ends of the upper and lower connecting rings (18) (19) are fixed. ) Corresponding to the wire fixing metal fittings (22) and (23), the middle portions of the six extension limiting wires (32) are passed through the corresponding wire insertion metal fittings (31), whereby the telescopic duct (4) ) Growth is limited. Although not shown, the expandable duct (4) is grounded through the hoisting wire (9) and the connecting wire (12) and the conductive sheet (34).

Winch (8) if telescopic duct (4) is not used
The hoisting wire (9) is wound up. In this way, as shown by the solid line in FIG. 1, the lower end of the telescopic duct (4) is lifted away from the lower duct (2), and the telescopic duct (4) contracts below the upper duct. Stored as state. When the expansion duct (4) is not used for a long period of time, it is preferable to fix the expansion duct (4) to the upper duct (1) in a contracted state. Telescopic duct (4)
Since the expansion limiting wire (32) is loosened when is contracted, the expansion duct (4) can be fixed by utilizing this. When the telescopic duct (4) is contracted in this manner, a space is created between the telescopic duct (4) and the lower duct (2), and the object to be coated can be moved through this space.

Winch (8) when using telescopic duct (4)
The hoisting wire (9) is gradually fed out. As a result, the telescopic duct (4) extends downward by its own weight, and the protrusion (26) of the lower connecting ring (19) fits into the hole (14) of the connecting ring (13) of the lower duct (2), and these Are connected. When the lower connecting ring (19) of the expandable duct (4) is connected to the connecting ring (13) of the lower duct (2), this is detected by a limit switch (not shown), and the winding wire (9) is unwound. Stop. In addition, the elongation-restricted wire (3
By stretching 2), the extension duct (4) is prevented from overextending, and the bellows sheet (17) constituting the extension duct (4) is not damaged by its own weight or other pulling force. Until the lower connecting ring (19) of the telescopic duct (4) is connected to the connecting ring (13) of the lower duct (2), the fixing device (25) is switched off. Turn this switch on. As a result, the suction plate (1) of the connecting ring (13) of the lower duct (2) is
5) is attracted to the magnet of the fixing device (25) and fixed. At this time, since the projections (26) of the lower connecting ring (19) of the telescopic duct (4) are fitted in the holes (14) of the connecting ring (13) of the lower duct (2), they are displaced in the horizontal direction. Never. Then, by fixing the lower end of the expansion duct (4) to the lower duct (2) in this way, the upper duct (1) and the lower duct (2) are connected by the expansion duct (4) and this is ventilated. It can be used for such purposes. Further, since the telescopic duct (4) is electrically conductive and is grounded as described above, the telescopic duct (4) is prevented from being charged, and is highly safe in combination with being non-flammable. However, when there is no risk of fire or explosion, the expansion duct (4) does not necessarily have to be nonflammable and electrically conductive.

When retracting the telescopic duct (4), first, the fixing device (25) is turned off to release the fixation between the lower duct (2) and the telescopic duct (4), and the winch (8) hoists it. The wire (9) is wound up and the telescopic duct (4) is contracted upward as described above. When the telescopic duct (4) is sufficiently contracted, this is detected by a limit switch (not shown), and the winding of the hoisting wire (9) is stopped.

The structure of each part of the expandable duct device (3) is not limited to that of the above-mentioned embodiment, but can be changed appropriately within the scope of the present invention.
For example, in the above embodiment, the middle portion of the elongation limiting wire (32) is only passed through the metal fitting (31) of the expansion duct (4) and is not fixed, but an appropriate portion in the middle of the elongation limiting wire. May be fixed at an appropriate position in the middle of the expansion duct.

Effect of the Invention According to the elevating type telescopic duct device of the present invention, as described above, it is possible to easily install and remove the duct simply by extending and retracting the hoisting cord by the hoisting means to extend and retract the telescopic duct. Can be done, and troublesome work is unnecessary.

By using a carbon fiber sheet with aluminum vapor-deposited on both sides and stitching it with stainless steel threads, the stretchable duct becomes non-flammable and electrically conductive. In the case where the flexible and electrically conductive telescopic duct is grounded through the metallic connecting cord and the hoisting cord, it is possible to prevent the telescopic duct from being charged and improve safety.

[Brief description of drawings]

FIG. 1 is a side view of a lifting type telescopic duct device showing one embodiment of the present invention, and FIG. 2 is a side view of the telescopic duct with a part notched,
FIG. 3 is a bottom view of the telescopic duct, FIG. 4 is a plan view of the lower duct, FIG. 5 is an enlarged sectional view of an essential part of FIG. 2, and FIG.
FIG. 7 is an enlarged sectional view of another main part of the figure, and FIG. 7 is an enlarged sectional view taken along the line VII-VII of FIG. (1) ... upper duct, (2) ... lower duct, (3) ... elevating type telescopic duct device, (4) ... telescopic duct, (8) ... electric winch, (9) ... hoisting wire, (12) ... Connecting wire, (17) ... Bellows sheet, (25) ... Fixing device (fixing means), (32) ... Extension limiting wire.

Claims (3)

[Scope of utility model registration request] 1. A bellows-shaped telescopic duct having an upper end fixedly connected to another upper duct and a lower end removably connected to another lower duct, and a hoisting unit arranged above the upper duct. Means, one hoisting rig fed from the hoisting means and passed through the center of the telescopic duct through the upper duct, and three or more points on the lower end of the telescopic duct and the lower end of the hoisting rig A connecting cord for connecting to and, an extension-restricting cord whose both ends are fixed to the upper end of the upper duct or telescopic duct and the lower end of the telescopic duct to limit the extension of the telescopic duct, and the lower end of the telescopic duct. Lifting type telescopic duct device, which includes a fixing means for fixing these when they are connected to the lower duct. 2. The expandable duct is nonflammable and electrically conductive,
The elevating type telescopic duct device according to claim 1, wherein the hoisting cord and the connecting cord are made of metal, and the telescopic duct is grounded through the connecting cord and the hoisting cord. 3. The elevating / lowering according to claim 2, wherein the bellows sheet constituting the expansion duct is a carbon fiber sheet with aluminum vapor-deposited on both sides, and is sewn using a thread made of stainless steel. Telescopic duct device.