JPH08299485A - Fire proof damper of smoke exhaust device - Google Patents

Abstract

PURPOSE: To simplify the constitution of an opening and closing mechanism to close a cut-off plate and provide high operational performance by installing a locking member consisting of a distal side half body and proximal part side half body separated from each other according to a set temperature between an apparatus body and gear body and locking a locking part of the distal side half body on a ratchet gear part of a gear body. CONSTITUTION: When a fire breaks out to heat the proximity of a fire-proof damper B to a high set temperature, solder interconnecting the distal side half body 9 and the proximal side half body constituting a locking member 8 is fused. Then, the distal side half body 9 is separated from the proximal side half body 10 and a cut-off plate 1 held by the locking member 8 is released and set from the closing condition to the opened condition instantaneously by a return spring member 4 to instantaneously close a smoke exhaust path. Also, when the locking member 8 is set again after the operation, a fixture 33 is removed to remove the proximal side half body 10 from a support plate 32, and a new locking member interconnecting integrally the distal side half body 9 and the proximal side half body 10 is mounted to the support plate 32 with the fixture 33.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fireproof damper for a smoke exhaust device installed in a smoke exhaust passage of a kitchen or the like.

[0002]

2. Description of the Related Art Conventionally, the applicant of the present application has previously proposed a fireproof damper B as a fireproof damper B for preventing a large fire due to flames flowing around a building through a smoke exhaust passage communicating with the kitchen hood.
No. 166039 has been filed. This real application Sho 55-1
As shown in FIG. 14, No. 66039 is provided with an opening / closing mechanism part A using a heat-sensitive bending element 40 called a bimetal, and when a fire or the like occurs and the vicinity of the kitchen hood approaches an abnormal temperature, the opening / closing mechanism part is opened. Due to the deformation of the heat-sensitive bending element 40 provided in A, the blocking plate 1 in the open state, which is biased to the closing state, is opened and the blocking plate 1 is closed, whereby the smoke exhaust passage 3 is closed. It is like this. Here, in the opening / closing mechanism section A, as shown in FIG. 14B, the heat-sensitive bending element 40 is attached to one end of a substantially U-shaped attachment arm 41, and the spring 42 is attached to the other end of the attachment arm 41. The tip of the lever portion 43, which is connected to the spring 42 and is axially supported near the spring 42, has the heat-sensitive bending element 40.
The ratchet gear 45 is engaged with the pawl 44 at one end of the lever portion 43 which is pivotally supported. By winding a wire around the winding shaft 46 of the ratchet gear 45, each blocking plate 1 is held in an open state via a door interlocking metal fitting to which the wire is connected.
6 is always urged in the direction of closing the blocking plate 1 by the spring force of the torsion spring.

When a flame is blown upward in the event of a fire or the like, the heat-sensitive bending element 40 is warped and deformed in the direction of arrow A in FIG. 14 (b), whereby the lever portion 43 is disengaged from the heat-sensitive bending element 40. , The other end of the lever portion 43 is lowered downward, one end is pulled upward by a spring 42, and the pawl 4 is locked to the ratchet gear 45.
4 is disengaged from the ratchet gear 45 and the take-up shaft 46 is rotated in the direction of loosening the wires, so that the respective blocking plates 1 are closed at the same time. It is designed to prevent smoke and flames from entering.

[0004]

However, in the conventional example as described above, in constructing the opening / closing mechanism portion A, the spring 42 for pulling and biasing one end of the lever portion 43 upward, and the winding shaft. A torsion spring for urging 46 in the return direction, a torsion spring 47 for supporting the lever portion 43, a winding shaft 46 for winding the wire, and a ratchet for holding the wire in the winding shaft 46. There is a problem that a large number of parts such as the gear 45 are required, a large number of parts are required to form the opening / closing mechanism part A, and the cost increases, and the opening / closing mechanism part A has a plurality of operating parts. However, there was a problem in that the installation space became large and required a large installation space. Further, the warp deformation of the heat-sensitive bending element 40 is performed while the lever portion 43 remains locked to the heat-sensitive bending element 40, and the blocking plate 1 is closed in the closing direction only when the lever portion 43 is disengaged from the heat-sensitive bending element 40. Lever part 4 because it can be moved to
3 and the frictional resistance of the engaging portion of the heat-sensitive bending element 40, the operation speed is likely to change, and in order to obtain high operation performance, it has been necessary to perform a delicate adjustment at the time of manufacturing. That is, when the thermosensitive bending element 40 and the lever portion 43 are locked to each other in the state where a strong spring force is applied, a large friction resistance acts on the locking portion, and the thermosensitive bending element 40 becomes difficult to operate. Is.

An object of the present invention is to solve the above problems, and it is possible to obtain a high operating performance while simplifying the structure of the opening / closing mechanism for closing the shutoff plate in the event of a fire. It is intended to provide a fire damper for smoke equipment.

[0006]

In order to achieve the above object, according to the present invention, an equipment body 2 having a blocking plate 1 which is pivotally supported at its central portions at both ends and which can be opened and closed is provided in a smoke exhaust passage 3. And a holding member 5 for holding the blocking plate 1 in the open state against the spring force of the return spring member 4 for urging the blocking plate 1 in the closed state. On the rotation axis of the shutoff plate 1, the gear body 6 is arranged upright so as to be orthogonal to the rotation axis of the shutoff plate 1, and the locking member 8 protruding from the body 2 is provided. The locking member 8 composed of the front half half 9 and the base half half 10 which are separated from each other is erected between the body 2 and the gear body 6, and is provided on the front half half 9. It is characterized in that the stopper 38 is locked to the ratchet gear 6b of the gear body 6.

[0007]

However, when the fire or the like causes the ambient temperature of the installation site to rise to the set abnormal temperature, the locking member 8
The front side half body 9 and the base side half body 10 constituting the above are separated, the connection between the locking member 8 and the blocking plate 1 via the gear body 6 is instantly released, and the locking member 8 When the holding by is released, the blocking plate 1 is closed by the spring force of the return spring member 4 and the smoke exhaust path 3 is blocked,
It is possible to prevent a large fire from being caused by flames flowing around the building through the smoke exhaust passage 3.

[0008]

The present invention will be described below in detail based on the illustrated embodiments. As shown in FIG. 1, the fire damper B according to the present invention includes a plurality of shield plates 1 which can be opened and closed by pivotally moving to a body 2 formed into a rectangular tube shape by a plurality of thin plate members 11. The blocking plate 1 is held in an open state by a holding member 5 provided on the body 2.

Of the plurality of thin plate members 11 constituting the body 2, a pair of thin plate members 11 facing each other are provided with mounting pieces 11a at the edges thereof.
Is provided, and the body 2 can be attached to the smoke exhaust passage 3 through the attachment piece 11a. A partition plate 12 is provided on the inner surface of the body 2 along the inner circumference thereof. Each blocking plate 1 which is attached to the body 2 so as to be rotatable and movable.
Is formed in the shape of a strip plate, and the connecting pieces 13 provided at the center of the ends in the lateral direction can be pivotally moved by axially attaching the connecting pieces 13 to the connecting receiving pieces 14 provided upright on the partition plate 12. You can do it. Here, even if the blocking plates 1 having a large area are used by axially attaching the central portions of both ends to the body 2, the turning radius of each blocking plate 1 can be made small. In addition, the closing movement can be quickly performed while securing the same opening area and closing area as the blocking plate 1 in the conventional example shown in FIG. 15 in which both ends of the blocking plate 1 are pivotally supported. Exhaust channel 3
Can be closed instantly.

Each blocking plate 1 is provided with a step portion along the rotation axis, and the respective half portions 1a and 1b are arranged in a stepped shape. That is, one half portion 1a
The upper surface of the partition plate 12 is located below the lower surface of the partition plate 12, and the lower surface of the other half 1b is the partition plate 12.
Is located above the upper surface of the partition plate 12. As shown in FIGS. 3 and 4, when the blocking plate 1 is closed, the upper surface of one half portion 1a is brought into contact with the lower surface of the partition plate 12, and The lower surface of the half body portion 1b is brought into contact with the upper surface of the partition plate 12 to be in a closed state.

As shown in FIGS. 2 and 4, a connecting protrusion 15 is provided on the back side of each shutoff plate 1, and the connecting protrusion 15 is an interlocking metal member 16 arranged along the partition plate 12.
Each of them is pivotally supported, and the movement of the interlocking metal fitting 16 causes the respective blocking plates 1 to interlock with each other to perform the same movement. A return spring member 4 such as a coil spring is projected from the interlocking metal fitting 16, and the return spring member 4 is connected to a thin plate member 11 that constitutes the body 2. The return spring member 4 is adapted to urge each blocking plate 1 to a closed state when the blocking plate 1 is in an open state. When the blocking plates 1 are opened, the blocking plates 1 are returned. The spring force of the spring member 4 is always biased in the closing direction.

Here, in the case where the rotary shaft is arranged near one end of both ends like the blocking plate 1 in the conventional example shown in FIG. 15, the wind pressure acting on the blocking plate 1 in the closed state is Since both sides are different (reference numeral F ₁ > F _{2 in the} figure), each blocking plate 1 is likely to open due to wind pressure. Therefore, the return spring member used to urge each blocking plate 1 to the closed state is It is necessary to use a strong pulling force, and the opening / closing mechanism that holds the blocking plate 1 in the open state against the strong pulling force of the return spring member uses, for example, a plurality of spring members and has a strong holding force. Although it is necessary to adopt a complicated structure, the blocking plates 1 in this embodiment are closed as shown in FIG. 13 because the central portions of both ends are axially attached to the body 2. Wind acting on the blocking plate 1 in the formed state Forces balance with each other on both sides of the rotation shaft (reference numeral F ₁ = F ₂₎ becomes possible, to hold the airtightness of the closed state of the shield plate 1 while holding the shielding plate 1 in the closed state Even if a return spring member 4 having a small pulling force is adopted as the return spring member 4 used in the above, the return spring member 4 can instantaneously operate each blocking plate 1 to move it to the closed state in an emergency.

Further, as will be described later, while the blocking plate 1 is held in the open state by the locking member 8 via the gear body 6, the holding by the locking member 8 is released to close the blocking plate 1. Is a spring member having a strong returning force as the return spring member 4 because the front half body 9 and the base half body 10 which form the locking member 8 are formed so as to be separated from each other when the set temperature is reached. Even if the engagement between the locking member 8 and the gear body 6 is made strong by using it, the front side half body 9 and the base side half body are irrespective of the locked state of the front side half body 9 and the gear body 6. This is done by separating 10 and 10, there is little difference in the movement to the closed state at the set temperature, and a predetermined sensitivity is obtained without being influenced by the spring force of the return spring member 4. It can be ensured, and even if the strong return spring member 4 is used, the operation performance at the time of release The difference is that does not come out. That is, even if the return spring member 4 to be used has a different spring force, the operation performance of the opening / closing mechanism portion is unlikely to differ.

As shown in FIG. 5, a holding member 5 for holding each blocking plate 1 in an open state is provided so as to project from a gear body 6 provided on the rotation axis of the blocking plate 1 and an equipment frame 2. In addition, the spring member 7 and the locking member 8 are urged toward the gear body 6 side. The gear body 6 is a thin plate-shaped and semi-arcuate base body 6a having a serrated ratchet gear portion 6b on the outer peripheral edge portion.
And a fixing piece 6c connected and fixed by a fixing tool 31 to the outer surface of the blocking plate 1 from the lower end edge of the base 6a.

As shown in FIG. 11, the locking member 8 is formed by soldering a front side half body 9 and a front side half body 9 made of metal such as a copper plate having a U-shaped cross section and having a high thermal conductivity. Are bonded and integrated with each other. The above-mentioned solder is melted at a set temperature, and by melting the solder in this way, the adhesion between the front side half body 9 and the base side half body 10 is released, and the front side half body 9 and the base side half body. 10 and 10 are separated. Here, various kinds of solder can be considered as the solder used to bond the front half 10 and the base half 10, and various solders having different melting temperatures can be used. The set temperature at which the front side half body 9 and the base side half body 10 are separated can be set to an arbitrary temperature. Further, as the locking member 8, in addition to the front side half body 9 and the base side half body 10 made of a metal such as a copper plate, those formed of a heat resistant hard synthetic resin material or the like should be used. It is also possible to use those which are fixed to each other with an adhesive that melts at a predetermined set temperature. That is, it is possible to employ various types in which they are separated from each other at the set temperature.

An opening 9a serving as a locking portion 38 is provided at the front portion of the front side half body 9, and the ratchet gear portion 6b of the gear body 6 is inserted and locked in the opening 9a. It has become. Here, the opened state of each blocking plate 1 can be arbitrarily adjusted by appropriately setting the position of the ratchet gear portion 6b inserted and locked in the opening 9a. The locking member 8 is formed by fixing the base side half body 10 to the fixture 3
By being connected to the support plate 32 at 3, it is installed so as to project from the support plate 32 toward the gear body 6 side.

An end portion of the support plate 32 is axially attached to a mounting substrate 34 fixed to the inner surface of the body 2, and the support plate 32 is rotated from the support plate 32 with the axial attachment portion of the end portion as a fulcrum. An operation piece 35 for operation is provided at one end. Here, the front half body 9 and the gear body 6 are the ratchet gear portion 6b.
Since they are engaged with each other in a state in which they are prevented from coming off, one hand holds the operation piece 35 and the other hand does not rotate the blocking plate 1 further in the opening direction than the locked position. The engagement between the front side half body 9 and the gear body 6 is not released, and when the holding by the locking member 8 is manually released, the operator's finger is caught between the respective blocking plates 1. It is designed to prevent dripping and improve safety.

A pair of connecting rings 36 are provided at the end edges of the mounting substrate 34 so as to be separated from each other, and a connecting ring 36 is also provided at the end of the support plate 32.
By arranging the connecting rings 36 adjacent to each other and connecting the connecting rings 36 with the connecting pins 37, the support plate 32 is pivotally mounted so as to be rotatable with respect to the mounting substrate 34. A spring member 7 such as a torsion spring is attached between a pair of connecting rings 36 provided on the attachment substrate 34, and the support plate 32 is constantly urged downward in FIG. 1 by the spring member 7. There is. In the illustrated embodiment, the spring member 7 is provided to urge the locking member 8 together with the support plate 32 toward the gear body 6 side, but the spring member 7 may be omitted. It's good.

As shown in FIGS. 7 and 11, the fire-proof damper B constructed as described above is provided with a filter 25 which is detachably attached to the side opening of the housing, and the inner upper and lower blinds of the grease filter device 26 are formed. The grease filter device 26 is attached to the opening of the plate by the attachment piece 11a at the peripheral portion, so that the grease filter device 26 can be attached to the inside of the smoke exhaust passage 3 continuous to the fan 28 via the duct 27. Then, the oil smoke generated on the kitchen equipment 29 or the like is sucked into the grease filter device 26 while the oil is separated and collected by the filter 25 by the suction force of the fan 28, and is sucked by the fan 28 from the ventilation opening of the damper through the duct 27. It is supposed to be discharged.

However, when a fire occurs in the kitchen and the temperature near the fire damper B becomes high and approaches the set temperature, the front half body 9 and the base half body 10 forming the locking member 8 are bonded. The solder being melted melts and the front half body 9 is separated from the base half body 10 from the open state shown in FIGS. 1, 2 and 5, and the holding of the blocking plate 1 by the locking member 8 is released. As shown in FIGS. 3, 4, and 6, the return spring member 4 instantly brings the shutoff plates 1 into the closed state, and the smoke exhaust passage 3 is instantly closed. Here, FIGS. 3, 4, and 6 show a state in which the front-side half body 9 is separated from the base-side half body 10.

When the locking member 8 is set again after the operation, the fastener 33 is removed and the base side half body 10 is removed from the support plate 32 so that the front side half body 9 and the base side half body 10 are separated from each other. The new locking member 8 which is connected and integrated is attached to the support plate 32 by the fastener 33.

[0022]

According to the present invention, a body having a blocking plate whose central portions are pivotally supported so that it can be opened and closed is disposed in the smoke exhaust passage, and the return plate biases the blocking plate to the closed state. A holding member for holding the blocking plate in an open state against the spring force of the spring member is provided on the body, and the holding member is erected so as to be orthogonal to the rotation axis of the blocking plate on the rotation axis of the blocking plate. The gear body and the gear are provided with a locking member composed of a gear body arranged and a locking member protruding from the body, which is composed of a front half body and a base half body which are separated at a set temperature. It is installed between the body and the ratchet gear part of the gear body, and the locking part provided on the front half is locked to the abnormal temperature that the ambient temperature of the installation site is set in case of fire etc. By ascending, the front half and the base half forming the locking member are separated, and the locking member and the blocking plate are connected via the gear body. When the holding member is released, the blocking member is closed by the spring force of the return spring member to instantly shut off the smoke exhaust path. Since the opening-and-closing mechanism part is operated by separating the front half and the half on the base side, which constitute the above, it depends on the engagement state of the gear body and the locking member. It is possible to operate the opening / closing mechanism without using it, and to obtain high operating performance while simplifying the structure of the opening / closing mechanism that prevents flames from turning to the building and causing a large fire through the smoke exhaust path. Is something that can be done. Further, even if the engagement portion provided on the front half is engaged with the ratchet gear portion provided on the gear body so that the engagement between the engagement member and the gear body is not easily disengaged, the opening / closing mechanism There is no hindrance to the operating performance of the parts, and thus the engagement between the locking member and the gear body can be made difficult to disengage, so that the locking member and the gear body can be disengaged by an external force such as vibration. Can be prevented
It is possible to eliminate a malfunction such that the blocking plate is unexpectedly closed by an external force.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention with a blocking plate opened.

FIG. 2 is a perspective view seen from another direction with the blocking plate open.

FIG. 3 is a perspective view showing a state in which a blocking plate is closed.

FIG. 4 is a perspective view seen from another direction with the blocking plate closed.

FIG. 5 is a partially enlarged perspective view of a state in which a blocking plate is opened.

FIG. 6 is a partially enlarged perspective view of a state in which a blocking plate is closed.

FIG. 7 shows the installation site of the fire protection duct,
(A) is a schematic block diagram and (b) is an enlarged view.

FIG. 8 is a cross-sectional view showing an arrangement state of a holding member and a state before the locking member is locked to the gear body.

FIG. 9 is a plan view of the above with a part thereof omitted.

FIG. 10 is a side view with the same part omitted.

FIG. 11 is a view showing a locking member, (a) is a plan view and (b) is a front view.

FIG. 12 is a schematic configuration diagram showing an installation site of a fire protection duct viewed from another direction.

FIG. 13 is an explanatory diagram illustrating a wind pressure acting on a blocking plate.

FIG. 14 shows a conventional example, (a) is a perspective view,
(B) is a front view of the opening / closing mechanism part.

FIG. 15 is an explanatory diagram illustrating a wind pressure acting on a blocking plate in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blocking plate 2 Body 3 Smoke exhaust path 4 Return spring member 5 Holding member 6 Gear body 6b Ratchet gear part 8 Locking member 9 Front side half body 10 Base side half body 38 Locking part

Claims (1)

[Claims] 1. A spring of a return spring member for arranging, in a smoke exhaust passage, a body having a blocking plate whose central portions are pivotally supported so that it can be opened and closed, and biases the blocking plate to a closed state. A gear member that is provided with a holding member for holding the blocking plate in an open state against the force on the body and is vertically arranged so as to be orthogonal to the rotation axis of the blocking plate on the rotation axis of the blocking plate. A body and a locking member protruding from the body, and a locking member composed of a front half and a base half that separate at a set temperature is provided between the body and the gear body. A fire-damping device for a smoke exhaust device, which is constructed by being installed on a front half of the gear body, and having a locking portion provided on a front half thereof locked to a ratchet gear portion of a gear body.