JPH11200722A - Door with ventilation function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door having a draft function, by which draft and ventilation from an entrance are carried out while bearing constant fire preventive performance. SOLUTION: An airflow path 6 communicating the indoor side and the outdoor side is formed to the door 2 of a door 1A installed to an outdoor entrance, and a blind 7 is mounted on the outdoor side of the airflow path 6 while a damper 8A capable of closing the airflow path 6 is set up on the indoor side of the airflow path 6 in a freely opening-closing manner. An airflow-path closing means 81 sensing heat or smoke at the time of a fire and being started and automatically closing the damper 8A is fitted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilated door mainly provided at an outdoor entrance of a building.

[0002]

2. Description of the Related Art Doors provided at entrances of buildings and other outdoor entrances and exits must be robust, fire-proof and crime-proof for safety. Also, in the Building Standards Law,
It is stipulated that a fire door having a predetermined fire protection performance must be installed in a portion where there is a risk of fire spreading under certain conditions.

For this reason, doors using metal fittings such as iron or stainless steel, or doors using netted glass or heat-resistant glass have been generally provided at the entrances and exits of buildings.

[0004]

As described above, a door installed with an emphasis on fire prevention performance usually normally closes an entrance. That is, when the door is closed, it is not possible to obtain ventilation or ventilation from the doorway, and thus there is a problem that the indoor habitability is impaired.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a door with a ventilation function which allows ventilation and ventilation from an entrance while ensuring a certain level of fire prevention performance. I have.

[0006]

In order to achieve the above object, a door with a ventilation function according to claim 1 of the present invention comprises a door frame, a door frame which can be opened and closed in the door frame and which is closed when closed. A door provided so as to ensure airtightness between the door, a ventilation passage communicating between the indoor side and the outdoor side of the door is formed in the door, and a blindfold is provided on the outdoor side of the ventilation path. On the indoor side of the ventilation path, a damper capable of closing the ventilation path is attached to be openable and closable, and in the event of a fire, heat or smoke is detected to activate and close the ventilation path automatically. Means are provided.

[0007] In the door with the ventilation function according to claim 2, the damper of the door with the ventilation function according to claim 1 is provided.
The door is rotatably attached to the door so as to open and close.

According to a third aspect of the present invention, there is provided a door with a ventilation function, wherein the damper of the door with the ventilation function according to the first aspect comprises:
It is slidably attached to a door and opened and closed.

Further, the door with the ventilation function according to claim 4 is characterized in that the damper of the door with ventilation function according to claim 1 is:
It is mounted on a door frame on the indoor side so as to be rotatable and opens and closes.

[0010]

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

FIG. 1 shows a door 1 having a ventilation function according to the present invention.
2A and 3B show the indoor and outdoor elevations of the door with ventilation function 1A, respectively.

The door 1A with the ventilation function is of a single-opening type in which the door 2 opens toward the outside. The door 2 is suspended from the door frame 4 by hinges 3 attached to three suspension points. When the door 2 is closed, airtightness is ensured between the door 2 and the door frame 4.
A door check 5 is attached near the upper part of the door 2 on the indoor side.

The main body of the door 2 is an iron vertical frame 2.
1, 22 and side frames 23, 24, and a meshed glass 25 fitted inside thereof. The vertical frame 21 on the hanging side is made wider than the vertical frame 22 on the opening side, and the vertical frame 21 on the hanging side is formed with a ventilation path 6 for communicating between the indoor side and the outdoor side of the door 2. I have.

The ventilation passage 6 is a rectangular opening which is vertically elongated. A louver 7 is attached to the outdoor side of the ventilation path 6 as a blindfold for preventing peeping from the outdoor side and introduction of foreign matter. The louver 7 is formed by assembling thin blades 71 and 72 in a lattice shape. The louver 7 inclines the horizontal blades 72 outward to provide a shielding angle, thereby blocking a line of sight from the outdoor side.

On the other hand, on the indoor side of the ventilation passage 6, a damper 8A capable of closing the ventilation passage 6 is mounted. The damper 8A is a member made of an iron plate formed to have a size that closes the entire opening surface of the ventilation passage 6, and having no opening portion. The damper 8A is attached to the indoor surface of the door 2 at the edge opposite to the hanging base of the door 2, and is configured to open and close by rotating in a single-opening manner toward the indoor side.

A hinge type opening / closing device 81 having a built-in temperature fuse (not shown) is used at a portion where the damper 8A is attached to the door 2. The opening / closing device 81 can open or close the ventilation path 6 arbitrarily by rotating and opening / closing the damper 8A by a manual operation in normal times. In the event of a fire, the built-in thermal fuse blows at a predetermined temperature, and a biasing force such as a spring acts on the damper 8A to automatically close the damper 8A and close the ventilation path 6. Thus, the damper 8A serves as a so-called air volume damper and a fire damper. Reference numeral 82
Indicates a handle for opening and closing the damper 8A.

According to the door 1A with the ventilation function, in a normal state, by opening the damper 8A with the door 2 closed, the outside air can be taken into the room or ventilated indoors through the ventilation path 6. Therefore, even when the airtightness of the building is high, it is possible to secure ventilation and improve indoor habitability. Further, in the event of a fire, the damper 8A is automatically closed by the operation of the opening / closing device 81 to close the ventilation path 6, so that the diffusion and spread of smoke can be prevented. Therefore, the door 1A with the ventilation function can effectively function as a fire door specified in the Building Standards Act.

Next, another embodiment of a door with a ventilation function according to the present invention will be described with reference to FIGS. Note that the same reference numerals are used for the same parts as those in the above-described embodiment.

FIG. 4 shows a cross section of the door 1B with a ventilation function. The damper to be mounted on the indoor side of the door 2 is a sliding damper, not a rotary type as in the above embodiment.
B. The upper and lower portions of the damper 8B are supported and guided by guide rails 83 attached to the upper and lower portions of the door 2, so that the damper 8B slides right and left along the indoor surface of the door 2 to open and close. It has been done. In this way, the damper 8B can be opened and closed in normal times, and an opening / closing device (not shown) having a built-in temperature fuse is attached to the guide rail 83.
B is closed so as to close the ventilation passage 6.

A door 1C having a ventilation function whose cross section is shown in FIG. 5 is such that a damper is attached not to the door 2 but to a vertical frame portion of the door frame 4 on the indoor side to form a damper 8C.
The damper 8C is formed into a shape that just closes the opening on the indoor side of the ventilation path 6 at the position where the door 2 is closed, and turns one-sided in the indoor direction with the part attached to the door frame 4 as a fulcrum. It moves and opens and closes. A hinge-type opening / closing device 84 having a built-in thermal fuse is also used in this mounting portion, so that the damper 8C can be freely opened and closed in a normal state, and the damper 8C is automatically closed and the ventilation path 6 is closed in a fire. It has been done.

In each of the above-described embodiments, the opening / closing device having a built-in temperature fuse is used as the ventilation path closing means for starting up in the event of a fire and automatically closing the damper. Is not limited thereto, and may be a device using a shape memory alloy, or a device that is electrically operated in conjunction with a smoke sensor or a hot smoke combined type sensor installed on a ceiling or the like. What is necessary is just to select suitably from the means using various types of devices of the type or smoke-sensing type, which suits the conditions of the structure of the building and the laws and regulations.

Further, the size of the opening surface of the ventilation path formed in the door may be enlarged or reduced in consideration of the required amount of ventilation and the fire prevention performance to be provided in the door. Further, the shape of the opening surface of the ventilation path may not be vertically long as in the above-described embodiment, and the ventilation path may be formed in a horizontal frame portion of a door or the like as a horizontally long one. Further, the ventilation path formed in one door may not be provided at one place but may be provided in a plurality of parts.

As a countermeasure against insects in the opening, it is also preferable to attach a wire mesh inside the ventilation passage.

[0024]

According to the door with a ventilation function of the present invention, a ventilation path is formed in the door at the entrance, and a damper is attached to the ventilation path so that it can be opened and closed at normal times, so that the door can be closed even when the door is closed. It can take in outside air indoors and provide indoor ventilation. Therefore, even when the airtightness of the building is high, it is possible to secure ventilation and improve indoor habitability.

Further, the ventilation path is provided with ventilation path closing means for detecting the heat or smoke in the event of a fire and automatically closing the damper, so that the ventilation path is automatically closed in the event of a fire to prevent the spread of fire. Is done. In this way, the fire prevention performance required for the door of the entrance is also ensured.

Further, since a blind such as a louver is attached to the ventilation path, it is possible to prevent peeping from outside and entry of foreign substances when the ventilation path is opened.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a door with a ventilation function according to the present invention.

FIG. 2 is an elevational view of the indoor side door with the ventilation function.

FIG. 3 is an outdoor elevation view of the door with a ventilation function.

FIG. 4 is a cross-sectional view showing another embodiment of a door with a ventilation function according to the present invention.

FIG. 5 is a cross-sectional view showing still another embodiment of a door with a ventilation function according to the present invention.

[Explanation of symbols]

 1A, 1B, 1C Door with ventilation function 2 Door 4 Door frame 6 Ventilation path 7 Blindfold (louver) 8A, 8B, 8C Damper 81, 84 Ventilation path closing means (opening / closing device)

Claims (4)

[Claims] 1. A door comprising: a door frame; and a door provided in the door frame so as to be openable and closable and, when closed, provided with airtightness between the door frame and the door. A ventilation path communicating between the indoor side and the outdoor side is formed, and a blindfold is mounted on the outdoor side of the ventilation path, and a damper capable of closing the ventilation path is mounted on the indoor side of the ventilation path so as to be openable and closable. And a ventilating door provided with ventilating passage closing means for detecting the heat or smoke in the event of a fire and automatically closing the damper. 2. The door with a ventilation function according to claim 1, wherein the damper is rotatably attached to the door to open and close. 3. The door with a ventilation function according to claim 1, wherein the damper is slidably attached to the door to open and close. 4. The door with a ventilation function according to claim 1, wherein the damper is rotatably attached to a door frame on the indoor side to open and close.