JPS6039420Y2 - Smoke exhaust opening/closing device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a smoke outlet opening/closing device provided on a ceiling or wall to exhaust smoke generated by a fire or the like to the outdoors.

In general, a smoke exhaust opening/closing device normally supplies compressed air to a cylinder device to close the smoke exhaust vent cover (when there is no fire), and when smoke is generated due to a fire, compressed air is released from the cylinder device based on smoke detection or heat detection. The structure is such that when the smoke is discharged, the pressure of the spring opens the smoke exhaust port cover.

In addition, when the smoke exhaust port is made larger, the force required to open and close the smoke exhaust port is correspondingly large. Multiple standard-sized cylinder devices and springs are used depending on the area of the smoke port.

A conventional example of this type of smoke exhaust opening/closing device is shown in FIG.

In FIG. 1, 1 is a smoke exhaust port body, and between the main body 1 and the smoke exhaust port cover 2 are springs 3a and 3b for opening the smoke exhaust port.
, 3c are interposed, and cylinder devices 4a, 4b, 4c are installed in the springs 3a, 3b, 3C, respectively.

That is, cylinders 5a, 5b, and 5c are attached to the main body 1, and piston rods 6a, 6b, and 6c are connected to the lid 2.

In addition, 7 is a gasket that the end of the lid 2 comes into contact with, and 1
0 is a smoke exhaust duct, and 11 is a ceiling board.

In this conventional device, a spring 3 for opening the smoke exhaust port 2
The downward pressing force (hereinafter referred to as opening force) of a=3 b, 3 c is, of course, an upward force due to the negative pressure inside the duct generated by the operation of the smoke evacuation device (not shown) installed in the smoke evacuation duct 10. It is set taking into account the power of

Further, in this conventional device, the springs 3a, 3b, and 3c are configured to always apply a downward pressing force to the smoke exhaust port cover 2, and in the smoke exhaust port closed state shown in FIG. , 4b, and 4c all act on the smoke exhaust port cover 2 upwardly or on the main body 1 downwardly.

However, the upward pressing force (hereinafter referred to as closing force) of the cylinder device that originally closes the smoke exhaust vent cover is the downward force due to the weight of the smoke exhaust vent cover, and the tightening of the smoke exhaust vent cover to the gasket takes into account the force, etc. The upward pressing force of all the cylinder devices 4av4b, 4c as shown in FIG. 1 is not necessary.

That is, in the conventional device described above, all of the cylinder devices are connected to the smoke exhaust vent cover, and the closing force is an upward pressing force for all of the cylinder devices, so that more force than necessary is applied to the constituent members such as the smoke exhaust vent cover. Therefore, the strength of the structural members such as the smoke exhaust vent must be increased, which poses a problem that the device becomes heavy and expensive.

The present invention was devised in view of the above problems, and while it has the necessary smoke exhaust port closing force and smoke exhaust opening opening force, the strength of the structural members such as the smoke exhaust port cover is low, and the device is lightweight.・
The purpose is to provide an inexpensive smoke exhaust opening/closing device, and its features include a first spring that always acts in the direction of opening the WF smoke opening, and a first spring that acts against the first spring when compressed air is supplied. a first cylinder device that closes the lid; a second spring that acts in the direction of opening the lid only when the smoke exhaust port is open; and a second spring that releases the action of the second spring when compressed air is supplied to close the lid when the smoke exhaust port is closed. and a second cylinder device separated from each other.

The present invention will be explained below based on an embodiment shown in FIGS. 2 to 4.

2 is a front view of the smoke exhaust port opening/closing device according to the present invention, FIG. 3 is a view taken along the line A-A in FIG. 2, and FIG. 4 is a view taken along the line B-B in FIG. 2.

1 is the smoke outlet main body that forms the smoke exhaust port 0; 2 is the smoke outlet lid that opens and closes the smoke exhaust port 0; 7 is the smoke exhaust cover that is provided at the lower end of the smoke exhaust port body 1 and is in the smoke exhaust port closed state. 2 is a gasket that contacts, 10 is a smoke exhaust duct that communicates with the smoke exhaust port 0, and 11 is a ceiling plate. A mounting member 22 is provided at one end, and mounting members 21 are provided on both sides thereof.

A first cylinder device 31 is attached to the attachment member 21, and a second cylinder device 32 is attached to the attachment member 22.

The second cylinder device 32, as shown in detail in FIG. 44, and a receiving member 62 provided on the head side of the cylinder 52. 2 springs 72 are attached.

Further, the receiving member 62 is loosely fitted into a concave guide member 80 provided on the upper surface of the lid 2.

Like the second cylinder device, the first cylinder device 31 includes a piston rod 4 whose tip end is fixed to the mounting member 21.
1, the cylinder 51, and the receiving member 61, and a first spring 71 is installed between the outer periphery of the cylinder device 51, that is, between the receiving member 61 and the mounting member 21.

Further, both ends of the receiving member 61 are connected to the guide member 80 by pins 90.

In the figure, 12 is a locking member provided on the guide member 80 to prevent the cylinder 52 from twisting or rotating during its ascent, and 95 is a locking member connected to each supply/discharge hole of the piston rod 41, 42. This is a compressed air supply and exhaust pipe.

Further, the pressing force of the springs 71 and 72 is set in consideration of the negative pressure during operation of the smoke evacuation device, as in the conventional case.

Next, the operation of the smoke exhaust opening/closing device having the above configuration will be described.

Under normal conditions (no fire occurring), the supply/discharge pipe 9
Compressed air is supplied from 5.

When the compressed air passes through the supply and discharge holes of the piston rods 41 and 42 and reaches each rod-side cylinder chamber of the cylinder device 31, 32, the cylinder 51 rises against the first spring 71, and the cylinder 52 rises against the second spring. 72 and rises.

The lid 2 connected to the cylinder 51 rises together with the cylinder 51, and its end comes into contact with the gasket 7 and stops, thereby closing the smoke exhaust port 0.

At this time, the lower end of the cylinder 52 (receiving member 62)
As shown in the figure, it is separated from the lid 2 (guide member 80).

That is, in the normal state, the smoke exhaust port is closed by the upward pressing force of the first cylinder device 31, and in this smoke exhaust port closed state, the second cylinder device 32 does not apply upward pressing force to the lid 2.

In this state, if a fire occurs, the compressed air in each rod-side cylinder chamber of the cylinder device 31, 32 is discharged based on smoke detection.

Due to this discharge of compressed air, the upward pressing force of the cylinder devices 31 and 32 is released, so that the cylinder 51 is lowered by the downward pressing force of the first spring 71, and the cylinder 5
2 is lowered by the downward pressing force of the second spring 72 and comes into contact with the guide member 80, thereby pressing the lid 2 downward and opening the smoke exhaust port 0.

That is, when smoke is generated due to a fire, the downward pressing force of the first spring 71 and the second spring 72 opens the smoke exhaust port 0.

It should be noted that the present invention is not limited to the above embodiment, and for example, the first spring 71. The second spring 72 is connected to the cylinder 51.5.
2, or each spring.

The number of each cylinder device may be changed as appropriate depending on the smoke exhaust port installation conditions.

As is clear from the above description, the smoke exhaust opening/closing device according to the present invention has a first spring that always acts in the direction of opening the smoke exhaust opening, and a first spring that acts in the direction of opening the smoke exhaust opening only when the smoke exhaust opening is opened. a second spring, a first cylinder device that closes the υI smoke vent against the first spring, and a second cylinder device that releases the action of the second spring and separates from the smoke vent in the smoke vent closed state. According to the present invention, the first spring and the second spring
The spring can provide the necessary opening force for the smoke exhaust port, and the closing force for the smoke exhaust port can be made smaller compared to conventional devices in which the upward pressing force of all the cylinder devices used is used as the closing force for the smoke exhaust port. These structural members are lightweight and have low strength.

That is, according to the present invention, it is possible to obtain a smoke exhaust opening/closing device that has exactly the same performance as the conventional device, and is lightweight and inexpensive.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a conventional smoke exhaust opening/closing device, Figure 2 is a front view showing an embodiment of the smoke exhaust opening/closing device of the present invention, and Figure 3 is a sectional view of a conventional smoke exhaust opening/closing device.
The figure is a view taken along the line A-A in FIG. 2, and FIG. 4 is a view taken along the line B-B in FIG. 2. 1...Smoke exhaust port body, 2...Smoke exhaust port cover,
31...First cylinder device, 32...
Second cylinder device, 71...First spring, 72.
...The second thing is.

Claims (1)

[Scope of utility model registration request] a first spring that always acts in the direction of opening the smoke exhaust vent; one end of the spring is connected to the smoke exhaust vent body and the other end is connected to the lid, and the lid is moved against the first spring when compressed air is supplied; a first cylinder device that closes; a second cylinder device having one end connected to the main body and the other end being a free end and having a free end separated from the lid when compressed air is supplied to the smoke exhaust port; a second spring that acts in the direction of opening the lid only when compressed air is discharged from the device; supplying compressed air to both cylinder devices and closing the smoke exhaust port with the first cylinder device; A smoke exhaust opening/closing device characterized in that the smoke exhaust opening is configured to discharge compressed air from both cylinder devices and open the smoke exhaust opening by means of both springs.