JPH0251613B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hood with a fireproof shutter that is installed at the opening of a fireproof compartment to prevent the spread of the fire to other residences in the event of a fire.

BACKGROUND ART Conventionally, as shown in FIGS. 1 and 2, a temperature fuse hook 102 is provided on the inside upper part of a hood 101 provided in a fire protection compartment 100, and one end of a temperature fuse set 103 is connected to the temperature fuse hook. 102, and the other end of the temperature fuse set 103 is connected to the fire protection shutter 105 using the fuse set screw 104.
It is fixed at

Problems to be Solved by the Invention However, in such a conventional configuration, since the temperature fuse set 103 is provided inside the upper part of the hood 101, it is natural that the temperature fuse blowout part 10
6 will also be provided at the top, but the hood 10
The upper part of the fuse 106 can only obtain about half the wind speed as compared to the opening 107, and therefore, it takes a long time for the temperature of the thermal fuse blowing part 106 to rise. Therefore, a long time is required to blow out the temperature fuse set 103. Moreover, depending on the case, there may be cases where the melt does not break. In this hood with a fireproof shutter, the fireproof shutter 105 must be completely closed in the event of a fire, and the mounting method and location of the temperature fuse assembly 103 are very important.

The present invention is intended to solve these problems, and an object of the present invention is to provide a fireproof hood with a fireproof shutter that completely closes in the event of a fire.

Means for Solving the Problems In order to solve the problems, the present invention provides a hood with openings on the lower surface and the back surface, a fireproof shutter rotatably provided in the hood for opening and closing the opening on the lower surface, and and a temperature fuse set that pushes up the fire protection shutter from below and holds it in an open state, and the temperature fuse set includes two band-shaped springs, one end of each of which is polymerized and connected via a temperature fuse fusion part, The hood with a fireproof shutter is configured such that the other end of each is fixed to the lower surface of the hood and the fireproof shutter in a curved state.

Effect With this configuration, the temperature fuse fusion part is located at the connection part of the two springs that hold the fire shutter open, so it is located almost in the center of the ventilation path and can reliably detect abnormal temperatures in a fire in a short time. and melt it.
Fire shutters will be completely closed. In addition, the force that is constantly applied to the temperature fuse fusion section is in the direction that separates the overlapping joints of the two springs from each other, so the mechanical strength of the temperature fuse fusion section is maintained for a long period of time. Become.

Embodiment An embodiment of the present invention will be described below with reference to FIG.

A fireproof shutter 3 is provided inside a hood 2, which has an opening 1 whose lower surface is open to the outside, and an opening formed on the back side and which communicates with the interior via a duct or the like, and which opens and closes the opening 1 on the lower surface. ing. The fire shutter 3 is configured such that its lower end is supported by the lower front part within the hood 2 so as to be freely rotatable, and is normally held in a state of being pushed up from below by the temperature fuse set 4. The temperature fuse set 4 is formed by connecting two band-shaped springs by overlapping one end of each through a temperature fuse fusing part 7, and forming a single band-shaped spring with both ends in a curved state. It is fixed to the lower surface of the hood 2 and the fire shutter 3 by set screws 5 and 6. The temperature fuse fusion section 7 is located in the middle of the two springs, so the hood 2
It will be located almost in the center of the internal ventilation passage.

In the above configuration, the fire shutter 3 usually has
The open state is maintained by the temperature fuse set 4, but if the temperature reaches an abnormally high temperature in the event of a fire, the temperature fuse fusion part 7 will melt and the two springs will separate, causing the fire shutter 3 to fall downward under its own weight. to close the opening 1. In this closing operation, since the temperature fuse blowing section 7 is located approximately in the center of the ventilation passage, abnormal temperature is sensed in a short time and the opening is reliably closed by blowing the temperature fuse. This closed state is shown in FIG.

In addition, as another example, the open state and closed state of the fire shutter 3 are shown in FIGS. 4 and 6.
As shown in the figure. The basic structure and operation of this embodiment are the same as those of the embodiment shown in FIGS. 3 and 5 above.

By the way, in any of the above embodiments,
The force applied to the temperature fuse fusion section 7 is in the direction in which the overlapping connection section of the two springs separates from each other.
Temperature fuses that are weak against tension, compression, or bending in the longitudinal direction are strong in this direction, and their mechanical strength is maintained over a long period of time, ensuring the functionality of the hood with a fireproof shutter for a long period of time.

Effects of the Invention As is clear from the description of the embodiments above, according to the present invention, the temperature fuse blowing section senses abnormally high temperature during a fire and blows it out in a short time, thereby reliably closing the fire shutter and functioning properly. can be fully demonstrated.

In addition, the mechanical strength of the thermal fuse fusion section is maintained for a long time, and the function of the hood with a fireproof shutter is ensured for a long time.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a conventional hood with a fireproof shutter, Fig. 2 is a sectional view showing the installation state of a conventional hood with a fireproof shutter, and Fig. 3 is a sectional view of a hood with a fireproof shutter in an embodiment of the present invention. , 4th
The figure is a sectional view showing another embodiment, FIG. 5 is a sectional view of the hood with fireproof shutter shown in FIG. 3 with the opening closed by the shutter, and FIG. 6 is the opening of the same other embodiment. FIG. 1... Opening, 2... Hood, 3... Fire shutter, 4... Temperature fuse set, 7... Temperature fuse fusion section.

Claims (1)

[Claims] 1. A hood with openings on the bottom and back sides, a fire protection shutter rotatably provided in the hood to open and close the opening on the bottom surface, and a temperature fuse assembly that pushes up the fire protection shutter from below and holds it in the open state. The temperature fuse set includes two band-shaped springs, one end of each of which is overlapped and connected via a temperature fuse fusion part, and the other end of each of the springs is connected to the hood and the fire shutter in a curved state. A hood with a fireproof shutter fixed to the underside of the hood.