JPS5826671Y2 - Fire damper actuation device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a damper operating device that automatically closes a damper installed in a duct in the event of an emergency such as a fire to prevent fire smoke from spreading to other areas.

As such an operating device, one using a temperature fuse that is activated when the ambient temperature rises to a predetermined temperature is known, but the present invention closes the damper by accurately operating the temperature fuse. It is an object of the present invention to provide a damper actuation device that can be operated reliably.

Hereinafter, the present invention will be explained based on the accompanying drawings.

In FIG. 1, reference numeral 1 indicates a duct, and this duct 1 has a blade indicated by reference numeral 2, which is rotatable by its rotation shaft 3, and furthermore, so as to open and close the duct 1, it is always in the closed direction. It is attached with a force applied to it.

The above-mentioned rotation shaft 3 projects out of the duct 1, and one end of an arm designated by reference numeral 4 is fixed to this projecting portion.

Reference numeral 5 indicates a piston 6 that is advanced by air pressure.
shows a pneumatic cylinder fitted with a pneumatic cylinder 5, which is pivotally connected to the duct 1.

The piston 6 of the pneumatic cylinder 5 is pivotally connected at its tip to the other end of the arm 4.

The member designated by reference numeral 7 converts compressed air into a compressor (
One end of the tube is connected to the compressor, and the other end is connected to the cylinder 5.

A switching valve designated by the reference numeral 8 is disposed in the middle of the pipe body 7, and a pressing member designated by the reference numeral 9 is pivotally connected to the switching valve 8.

A member designated by reference numeral 10 is a retaining member having one end attached to the pressing member 9 so as to be able to slide in substantially the same direction as the rotating direction of the pressing member 9. The other end is a locking rod 1 of a temperature fuse type locking mechanism 11, which will be described later.
It is designed to engage in a direction that intersects the two.

A resilient member 13 whose ends are respectively locked to the pressing member 9 and the engaging member 10 is arranged on the engaging member 10.

In FIGS. 2 and 3, reference numeral 14 indicates a switching actuating piece, one end of which is rotatably pivoted to the switching valve 8, and a rotating body indicated by reference numeral 15 at the other end. It is installed.

When the switching operation piece 14 is rotated toward the switching valve 8, it presses a terminal, indicated by reference numeral 16, protruding from the switching valve 8, thereby causing the switching valve 8 to perform a switching operation.

The temperature fuse type locking mechanism 11 described above has a well-known structure,
Internal temperature fuse (not shown) that melts at a predetermined temperature
is provided, and when the temperature fuse is blown, the locking rod sinks into or retreats into the main body.

Here, the pressing member 9 during normal operation. Engagement member 10. The relationship between the temperature fuse type locking mechanism 119, the resilient member 13, and the switching actuation piece 14 will be explained.

As shown in FIG. 2, the locking rod 12 of the temperature fuse type locking mechanism 11 is projected and the end of the engaging member 10 is engaged with the locking rod 12, so that the engaging member 10 is pressed. The resilient member 13 is located in a compressed position relative to the member 9.

The compressed elastic member 13 rotates the pressing member 9 with respect to the switching valve 8 by its return force, and as a result of this rotation, the rotating body 15 in contact with the pressing member 9 moves toward the switching valve 8 side. be done.

The switching operation piece 14 is rotated toward the switching valve 8 by this movement of the rotating body 15, thereby pressing the terminal 16 toward the switching valve 8.

When the respective components are positioned as described above, the air path in the switching valve 8 becomes an air path that flows from the compressor side to the pneumatic cylinder 5, as shown by the arrow in the figure.

Next, the relationship between the above-mentioned constituent members in the event of an emergency will be explained.

As shown in FIG. 3, when the locking rod 12 is inserted into the temperature fuse locking mechanism 11, the locking member 10 is engaged with the locking member 10, so that the pressing member 9 is also free to rotate. At the same time as the pressing force on the switching actuation piece 14 is released, the terminal 16 is placed in the lowered position.

At this point, the air path in the switching valve 8 is changed, the supply of air from the compressor side is cut off as shown by the arrow in the figure, and at the same time, the air flow on the pneumatic cylinder 5 side is made free.

Next, the operation of the device of the present invention will be explained.

Under normal conditions, the locking rod 12 of the temperature fuse type locking mechanism 11 is projected, and the engaging member 10 is engaged with the locking rod 12, so that compressed air is transferred to the pneumatic cylinder 5 as shown in FIG. is being supplied to.

The blade 2 is normally biased in the closing direction, but since the piston 6 is advanced by the supply of compressed air to the pneumatic cylinder 5 as described above, the arm 4 pivoted to the screws 1 to 6 is moved forward. is rotated against the biasing force to open the opening.

(Indicated by the broken line in Figure 1.) In the event of an emergency such as a fire,
When the ambient temperature rises and reaches a predetermined temperature, the temperature fuse is fused and the locking rod 12 is inserted into the temperature fuse type locking mechanism 11, and the engaging member 10 is released.

This allows the pressing member 9 to rotate freely.
The switching actuation piece 14 and the terminal 16 are lowered, and as shown in FIG. 3, the air supply from the compressor side is cut off, and at the same time, the air flow from the pneumatic cylinder 5 side is made free.

When air flows freely on the cylinder 5 side, the backward movement of the piston 6 is not restricted, so the blade 2 is rotated in the closing direction by the force, and the duct 1 is closed.

(Indicated by a chain line in FIG. 1.

) According to the present invention, the switching valve is normally held by the pressing member pivotally connected to the switching valve, the engaging member slidably attached to the pressing member, and the engagement member. Since the locking rod is engaged in a direction transverse to the member, there is no force that changes the characteristics of the temperature fuse.
For example, it is possible to prevent the application of tensile force or the like.

This eliminates the problem of unstable operation due to changes in the melting temperature of the temperature fuse, and allows operation at a predetermined temperature at all times.

Furthermore, even if it is necessary to increase the downward force of the terminal to ensure reliable switching of the switching valve, the force of the downward force is not directly transmitted to the temperature fuse, so the strength of the temperature fuse is weak. You can choose relatively freely.

Therefore, the effect of reliably operating the switching valve and rotating the blade in the closing direction due to this operation can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the device of the present invention, and FIGS. 2 and 3 are enlarged views of the main parts. 1...Duct, 2...Blade, 3...
...Rotation axis, 5...Pneumatic cylinder, 7.
... Pipe body, 8 ... Switching valve, 9 ...
・Press member, 10...Engagement member, 11...
... Temperature fuse type locking mechanism, 12 ... Locking rod, 13 ... Resilient member, 14 ... Switching operation piece.

Claims (1)

[Scope of utility model registration request] a duct, a blade rotatably attached to the duct to open and close the duct and always biased in the closing direction, and a blade connected to the rotating shaft of the blade to resist the biasing force and keep the blade open. a pneumatic cylinder, a switching valve disposed in the middle of an air path to the pneumatic cylinder for switching the air path, and a switching valve rotatably pivoted to the switching valve to control the rotation of a switching actuating piece of the switching valve. a holding member whose one end is attached to the pressing member so as to be able to slide in substantially the same direction as the rotating direction of the pressing member; a temperature fuse type locking mechanism having a locking rod that can be engaged, one end of which is locked with the engaging member and the other end with the pressing member; A fire protection damper operating device comprising a resilient member that is compressed when engaged.