JP3317934B2 - Ventilation vent with fire protection plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vent provided with a fire prevention plate.

[0002]

2. Description of the Related Art A cylindrical portion which is attached to a pipe (duct) provided on a wall and which is fitted into the pipe and a ventilation window provided with a ventilation window connected to the front side of the cylindrical portion. Some of the vents provided with a fire prevention mechanism provided with two semi-circular fire prevention plates for closing the ventilation path of the cylindrical portion in the event of a fire.

[0003] In this fire prevention mechanism, a shaft is generally provided inside the cylindrical portion, and two fire prevention plates which are urged by a spring are pivotally mounted on the shaft. The plate is configured so as to close the ventilation path of the cylindrical portion when opened by elasticity of the spring, and to form a ventilation path in the cylindrical portion when closed against the elasticity of the spring. At the edge of the side facing the shaft when the door is closed, a thermal fuse connecting the edges is provided, and this thermal fuse is cut off when the temperature exceeds a predetermined temperature at the time of fire occurrence, and the two thermal fuses are cut off. The connection of the edges of the fire prevention plate is released, and as a result, the two fire prevention plates close the ventilation path.

[0004] There are several types of thermal fuses that are determined by the standard depending on the cutting temperature. That is, for example, in a ventilation opening used under high temperature conditions such as a kitchen, a temperature fuse that is cut at a high temperature such as 120 ° C. is adopted so that the temperature fuse is not blown at a low temperature. For ventilation vents used under relatively low temperature conditions, the temperature fuse cut at the high temperature has a sensitivity problem that the temperature fuse is not easily blown when the temperature rises in the event of a fire. A thermal fuse that is cut at a low temperature is adopted.

[0005] By the way, in the standard of the conventional vent, a vent which is compatible with the vent used under the high temperature condition and the vent used under the low temperature condition is adopted. The shape is also 7
The same is true for 2 ° C.

Therefore, heretofore, when the thermal fuse is cut once and the fire prevention plate is opened, and then the fire prevention plate is closed and the thermal fuse is attached again, the shape is exactly the same for both 120 ° C. and 72 ° C. Therefore, there is a risk that the user will install a thermal fuse of the wrong temperature standard, or that a contractor who installs the ventilation port will install a thermal fuse of the wrong temperature standard.

The present invention has solved the above problems,
With a simple configuration, for example, in a situation where a high-temperature fuse must be used, a low-temperature fuse can be reliably prevented from being used accidentally. is there.

[0008]

The gist of the present invention will be described with reference to the accompanying drawings.

A tubular member 2 attached to a tubular member 1 having a ventilation function and fitted into the tubular member 1 and a ventilation portion 3 connected to the front side of the tubular portion 2 are provided. A shaft 4 is installed, and two fire prevention plates 6 urged by an elastic member 5 are pivotally attached to the shaft 4. When the two fire prevention plates 6 are opened by the elasticity of the elastic member 5, The air passage of the portion 2 is closed, and a ventilation passage is formed in the cylindrical portion 2 when the tube is closed against the elasticity of the elastic member 5, and the shaft when the two fire prevention plates 6 are closed is formed. A fuse 7 is provided on the edge opposite to the edge 4 so as to connect the edges together. When the temperature of the fuse 7 becomes higher than a predetermined temperature, the fuse 7 releases the connection of the edges of the two fire prevention plates 6. And the fuse 7 is provided with locking portions 8a and 8b for locking the edges of the two fire prevention plates 6 respectively. Are, the two of the locking portion 8a · 8b
The distance between them is set to a fixed distance for each of the fuses 7 corresponding to the predetermined temperature. On the other hand, when one or both of the facing surfaces of the two fire prevention plates 6 are closed, the two fire prevention plates 6 are closed. A convex portion 9 that regulates a minimum opposing gap at a portion where the fuse 7 is locked is provided, and the minimum opposing gap is set to be substantially equal to the distance between the locking portions 8a and 8b of the fuse 7. The present invention relates to a ventilation port with a fire prevention plate.

[0010] In the ventilation port with the prevention plate according to the first aspect, a protruding body 10 is provided on the inner surface of the cylindrical portion 2 near the shaft 4 so as to be substantially parallel to the shaft 4. The diameter is set to a diameter that can regulate the minimum facing gap, and relates to a ventilation port with a prevention plate.

Further, in the ventilation port with a fire prevention plate according to any one of claims 1 and 2, the projection 9 has a tool for sliding the two open fire prevention plates 6 in a closed state. The present invention relates to a ventilation port provided with a fire prevention plate, wherein a locking portion 11 for locking a finger or a finger is provided.

[0012]

The minimum opposing gap between the two fire prevention plates 6 when the two fire prevention plates 6 are closed is determined by the projection 9 interposed between the two fire prevention plates 6.

Accordingly, the amount of protrusion of the projection 9, that is, the minimum gap between the two fire prevention plates 6 (including the thickness of the prevention plate 6).
To the two locking portions 8a and 8 of the high-temperature fuse 7, for example.
By making the distance between them substantially equal to each other, it becomes impossible to mount the fuse 7 having a distance between the locking portions 8a and 8b smaller than this distance. Of course, the fuse 7 having the distance between the locking portions 8a and 8b larger than the distance of the minimum facing gap can be theoretically attached, but the fuse 7 is loosened and detached from the fire prevention plate, and is substantially removed. Cannot be used.

Therefore, by setting the distance between the two locking portions 8a and 8b of the fuse 7 and the amount of protrusion of the convex portion 9 for 120 ° C. and 72 ° C., for example, It will be possible to provide a ventilation opening A in which a different fuse 7 cannot be used.

Since the present invention is configured as described above, it is possible to use a simple configuration to reliably prevent a low-temperature fuse from being erroneously used, for example, when a high-temperature fuse must be used. It becomes a ventilation port with a fire prevention plate excellent in.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings illustrate embodiments of the present invention and are described below.

In this embodiment, a tubular member 2 attached to a tubular member 1 having a ventilation function and fitted into the tubular member 1 and a ventilating portion 3 formed with a ventilation window 3a connected to the front side of the tubular portion 2 are formed. A shaft 4 is erected inside the cylindrical portion 2, and two fire-preventing plates 6 urged by a spring are pivotally mounted on the shaft 4. The two fire-preventing plates 6 are 5 when opened by elasticity
Is closed so as to form a ventilation path in the cylindrical portion 2 when closed against the elasticity of the ridge 5, and faces the shaft 4 when the two fire prevention plates 6 are closed. A fuse 7 connecting the edges is provided on the side edge, and the fuse 7 is set so as to release the connection of the edges of the two fire prevention plates 6 when the temperature of the fuse 7 exceeds a predetermined temperature. Ventilation port A with fire protection plate 6
It is related to.

As shown in FIGS. 3 and 4, the fuse 7 is formed by a bonding agent (for example, a low melting point metal) in which the two L-shaped metal members 7a and 7b are melted at the predetermined temperature. The fuse 7 has a configuration in which one piece of 7b is superimposed and the other piece is joined so that the other piece faces each other.

Further, the fuse 7 has a temperature at which the bonding agent is melted by appropriately selecting a material of the bonding agent, and a temperature at which the two metal members 7a and 7b are separated from each other.
That is, the temperature at which the fuse 7 is cut is appropriately selected such as, for example, a high temperature of 120 ° C. and a low temperature of 72 ° C.
Therefore, depending on the setting of the material of the bonding agent, the fuse 7 is cut at a different predetermined temperature.

Further, the other pieces of the L-shaped metal members 7a and 7b are set so as to become locking portions 8a and 8b which are locked to the tips of the two fire prevention plates 6, respectively. The distance between the two locking portions 8a and 8b is set to the above-mentioned predetermined distance depending on the bonding agent used. Therefore, when the temperature of the fuse 7 becomes equal to or higher than a predetermined temperature, the bonding agent is melted to separate the two metal members 7a and 7b.
Is released from the action of connecting the two fire prevention plates 6,
The two fire prevention plates 6 block the ventilation path in the cylindrical portion 2.

In this embodiment, the type of fuse 7 having a small distance between the locking portions 8a and 8b shown in FIG. 3 is used for high temperature, and the distance between the locking portions 8a and 8b shown in FIG. The following description will be made on the assumption that the type fuse 7 is used for a low temperature.

On the other hand, near the region where the locking portion 8 of the fuse 7 is locked on the edge of the two fire prevention plates 6 on the side facing the shaft 4, the one fire prevention plate 6 is connected to the other. A protrusion 9 protruding toward the fire prevention plate 6 is provided.

The amount of protrusion of the projection 9 is set substantially equal to the distance between the locking portions 8a and 8b of the fuse 7 to be used (the actual amount of protrusion is the thickness of the two fire prevention plates 6). About a minute).

Further, when the fire prevention plate 6 in a state where the ventilation path of the cylindrical portion 2 is shielded by cutting the fuse 7 so as to close again, the tool 9 or the finger is pressed from the ventilation portion 3 side. A ring-shaped locking portion 11 is provided for inserting and locking the tool, finger, or the like to cause the fire prevention plate 6.

When the elasticity of the fire-preventing plate 6 itself may cause the fire-preventing plate 6 to bend, particularly when the distance between the two fire-preventing plates 6 in a closed state is large, the bending of the fire-preventing plate 6 is prevented. Therefore, the locking between the fire prevention plate 6 and the locking portion 8 of the fuse 7 may be released.

Therefore, in order to prevent the deflection of the fire prevention plate 6, in this embodiment, as shown in FIGS.
A protruding body 10 having a columnar shape or the like is provided parallel to the shaft 4 near the shaft 4 on the inner surface of the shaft. Therefore, the fuse 7
When the locking portions 8a and 8b are locked to the two fire prevention plates 6, the minimum opposing gap between the two fire prevention plates 6 is restricted by the protrusions 10, and the closed state of the two fire prevention plates 6 , The two fire prevention plates 6
The closed state is maintained by the protrusion 9 located at the edge of the shaft and the protrusion 10 located at the side of the shaft 4, so that the deflection of the fire prevention plate 6 is favorably prevented.

The projection 10 is conventionally provided as a rotation restricting member for the fire prevention plate 6 pivotally attached to the shaft 4 (when the projection 10 is not provided, the fire prevention plate 6 is not connected to the shaft). 4
, And partially block the ventilation path of the cylindrical portion 2. In this embodiment, the function of maintaining the minimum opposing gap between the two fire prevention plates 6 in a state where the fire prevention plates are closed is provided by setting the diameter of the protrusions 10 to a predetermined size.

In the figure, reference numeral 12 denotes a wall, 13 denotes a ventilation window member, 14 denotes a fastening member to be removed when the ventilation window member 13 is removed from the ventilation unit 3, and 15 denotes a tube member 2 for preventing the tube member 2 from coming out of the tube 1. This is a retaining member.

Since the present embodiment is constructed as described above, when the two fire prevention plates 6 are closed, the minimum facing gap between the two fire prevention plates 6 is interposed between the two fire prevention plates 6. Since the projection 9 is limited by the contact of the fire prevention plate 6 with the projection 9, the projection 9 cannot be smaller than the projection of the projection 9.
That is, by setting the minimum facing gap between the two fire prevention plates 6 to be substantially equal to the distance of the fuse 7 in which the distance between the two locking portions 8a and 8b is constant by a different standard of a predetermined temperature, for example, It becomes impossible to attach the high-temperature fuse 7 in which the distance between the two locking portions 8a and 8b is small to the low-temperature ventilation port A in which the protruding amount of the portion 9 is large. By setting the distance between the two locking portions 8a and 8b of the fuse 7 and the amount of protrusion of the convex portion 9 in accordance with a predetermined temperature standard at which the fuse 7 is blown, such as ℃, Thus, a ventilation port excellent in practicality that can provide an incompatible ventilation port A is provided.

It should be noted that attaching the low-temperature fuse 7 having a large distance between the two locking portions 8a and 8b to the high-temperature ventilation port A having a small protrusion amount of the projection 9 requires two fire prevention plates. 6 is always urged by the spring 5 and the distance between the two fire-prevention plates 6 is always increasing, so that the two engagement portions 8a and 8b of the two fire-prevention plates 6 and the fuse 7 are provided. Can be locked, and it is possible for the time being. However, in this case, since the facing gap between the two fire prevention plates 6 is not the minimum value, the two fire prevention plates 6 rattle due to vibration applied to the ventilation port a at the time of manufacture or transportation, and the two fire prevention plates 6 are rattled. The opposing gap of the fire prevention plate 6 varies to the same value as the amount of protrusion of the projection 9 and becomes narrow. Therefore, at the moment when the facing gap between the two fire prevention plates 6 becomes narrow, the engagement between the two fire prevention plates 6 and the two locking portions 8a and 8b of the fuse 7 is released, and the two fuses 7 are released. The fire protection plate 6 is separated from the two fire prevention plates 6, and the fire prevention plate 6 blocks the ventilation path of the cylindrical portion 2. Therefore, such a ventilation port A cannot be used, and the user, the contractor, the manufacturing worker, or the like can immediately notice that the fuse 7 of a different standard is installed, and correct it according to the standard. can do.

Further, since the protrusions 10 for limiting the minimum opposing distance between the two fire prevention plates 6 are also provided on the shaft 4 side of the two fire prevention plates 6, the two fire prevention plates 6 may be vibrated. As a result, the minimum distance between the two fire-prevention plates 6 is reliably maintained at a predetermined distance, and the two engagement portions 8a of the two fire-prevention plates 6 and the fuse 7 are unexpectedly prevented. It becomes a ventilation port which is more practical than the lock with 8b is not released.

Further, since the convex portion 9 is provided with a ring-shaped engaging portion 11 for engaging a tool, a finger, or the like to cause the fire prevention plate 6, the fuse 7 is cut off and two fire prevention plates are cut. Board 6
The operation of recovering after the ventilation path of the cylindrical portion 2 is shut off is performed by removing the fastening member 14 from the ventilation portion 3, removing the ventilation window member 13 from the ventilation portion 3, and then attaching the tool to the locking portion 11. The two fire-prevention plates 6 are attached to the two fire-prevention plates 6 by locking the two fire-prevention plates 6 and the fingers.
By locking the locking portions 8a and 8b of the fuse 7 to the end of the fuse and connecting the two fire prevention plates 6 again, the ventilation opening A with the fire prevention plate 6 can be easily used again. It becomes a ventilation port excellent in practicality and workability.

The projection 9 may be provided on only one of the two fire prevention plates 6.

The protrusions 10 may be provided either at two positions on the inner surface of the cylindrical portion 2 near the shaft 4 or may be provided at only one position. Further, the protruding body 10 need not be cylindrical, but may be, for example, prismatic. In this case, the diameter of the protruding body 10 referred to in the claims is the distance between the surfaces that come into contact with the two fire prevention plates 6.

[Brief description of the drawings]

FIG. 1 is an explanatory front view of the present embodiment.

FIG. 2 is an explanatory perspective view of the present embodiment.

FIG. 3 is an explanatory perspective view of a high-temperature fuse 7 of the present embodiment.

FIG. 4 is an explanatory perspective view of a low-temperature fuse 7 of the present embodiment.

FIG. 5 is an explanatory plan sectional view of a high-temperature ventilation port A of the present embodiment.

FIG. 6 is an explanatory plan sectional view of a high-temperature ventilation port A of the present embodiment.

FIG. 7 is an explanatory plan sectional view of a ventilation port A for low temperature according to the present embodiment.

FIG. 8 is an explanatory sectional perspective view of a main part of the present embodiment.

[Explanation of symbols]

 A Ventilation port 1 Tube material 2 Cylindrical part 3 Ventilation part 4 Shaft 5 Elastic member 6 Fire protection plate 7 Fuse 8a, 8b Locking part 9 Convex part 10 Projecting part 11 Locking part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F24F 13/14 A62C 3/00

Claims (3)

(57) [Claims] 1. A tubular member which is attached to a tubular member having a ventilation function and is fitted into the tubular member, and comprises a ventilating portion connected to the front side of the tubular portion, and a shaft is provided inside the tubular portion. On the shaft, two fire prevention plates which are elastically urged by an elastic member are pivotally attached. When the two fire prevention plates are opened by the elasticity of the elastic member, they block the ventilation path of the cylindrical portion, It is configured to form a ventilation path in the cylindrical portion when closed against the elasticity of the member,
A fuse is provided on an edge of the side facing the shaft when the two fire prevention plates are closed, and a fuse is provided so as to connect the edges together. A vent provided with a fire-preventing plate set to release the continuous connection of the edges of the fuses, wherein the fuse is provided with locking portions for locking the edges of the two fire-preventing plates, respectively. The distance between the parts is set to a fixed distance for each of the fuses corresponding to the predetermined temperature, while the fuse when the two fire prevention plates are closed is provided on one or both of the opposing surfaces of the two fire prevention plates. A protrusion for regulating a minimum opposing gap at a portion where the fuse is locked, wherein the minimum opposing gap is set substantially equal to the distance between the locking portions of the fuse. mouth. 2. The ventilation port with a prevention plate according to claim 1, wherein a protruding body is provided on the inner surface of the cylindrical portion in the vicinity of the shaft so as to be substantially parallel to the shaft, and the diameter of the protruding body is the minimum opposition. A vent with a prevention plate, which is set to have a diameter capable of regulating a gap. 3. The ventilation port with a fire prevention plate according to claim 1, wherein the projecting portion has a tool or a finger for sliding the two open fire prevention plates in a closed state. A vent provided with a fire prevention plate, characterized by being provided with a locking portion for locking.