JPH055152U - Separation Actuator for Fire Damper in Fire Prevention Device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a disconnection actuating tool capable of lifting a large fireproof damper and capable of reliably operating and dropping the fireproof damper in the event of a fire. [Structure] A base portion 3 that can be connected to a hoisting chain 27 for hoisting the fireproof dampers 22a and 22b at the upper end.
, A pair of levers 5, each having a protrusion 4, 4 on its inner edge.
5 are pivoted to the outside so that they can be opened. A thermal fuse 6, which can be blown at a predetermined temperature, is hung on both levers 5 and 5 and fixed. Counterweight 26
The head 7 is provided on the upper end of the connecting rod 8 connected to the base 3, and the head 7 is locked to the upper side of the protrusions 4 and 4 to connect the base 3 and the connecting rod 8. When the thermal fuse 6 is blown by the heat of fire, the levers 5, 5 are opened and the connecting rod 8 drops together with the counterweight 26, and at the same time loses its support.
Also, a and 22b are dropped and the conveyance path 20 is blocked.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The passages installed in the building, such as the transfer passages of the transfer facility and the ducts used for various purposes such as wiring and piping, are placed in each room, floor between floors, inside the ceiling, below the floor, etc. Therefore, once a fire occurs in a building, it becomes a passageway for flames and smoke, which can easily cause the spread of fire. In addition, in the event of a fire, the power supply and power lines are often destroyed.Therefore, in addition to electrically operated fire protection devices, a fire protection device that mechanically operates when a fire occurs is installed in this type of passage. Mandatory by law. In order to prevent the spread of fire through the passage in the event of a fire, the present invention suspends the fire damper with a rope, a chain, etc. during normal times, and drops the fire damper when a fire occurs to open the passage. Related to a fire protection device that is designed to shut off, especially when operated by the heat of a fire, it automatically disconnects from the supporting member that supports the fire protection damper and drops it. Regarding the ingredients.

[0002]

[Prior Art]

 Conventionally, the above-mentioned fire protection device is provided with a temperature fuse attached between the cord fixed to the support member and the fire damper so that the fire damper is cut off from the cord by fusing at a predetermined temperature. There is. However, since this fire protection device has a structure in which the weight of the fire damper is applied to the thermal fuse itself, if a large-sized fire damper with a large diameter passage is to be used, the weight of the fire damper must be the tensile load that the thermal fuse can withstand. It has the drawback that it cannot be used because it exceeds its power. If multiple temperature fuses are used in combination, the tensile strength that can be withstood will increase, but in this case, the one located inside each temperature fuse will take time to transfer heat when a fire occurs. There is a drawback that the operation varies.

Therefore, conventionally, when the fire damper is large, a disconnection actuating tool as shown in FIG. 5 has been used. This disconnecting tool has a through-hole 50 at the front end, is connected to one end of the temperature fuse 51 at the rear end, and has a substantially cylindrical fixing portion 53 provided with an extruding spring 52 on the inner side. The front end has a locking rod 54 that can project to the outside through the through hole 50, and the rear end is connected to the thermal fuse 51, and is separated from the through hole 50 by the pushing spring 52. And an actuating portion 55 disposed inside the fixed portion 53, which is biased in the direction. Then, the actuating portion 55 is pushed toward the tip side of the fixed portion 53 against the push-out panel 52, and when the locking rod 54 projects outward from the through hole 50, the rear end of the fixed portion 53 and the actuating portion. The thermal fuse 51 is connected between the rear ends of the 55. As described above, the disconnection actuating tool is such that the one with the thermal fuse 51 set therein is fixed to the supporting frame of the fireproof damper or the like, and then the engaging rod 54 of the portion projecting outward from the through hole 50, The end of the cord 56 that suspends the fire damper is hooked (FIG. 5 shows this state) and supported. Then, when a fire occurs and the temperature fuse 51 is melted by the heat, the actuating portion 55 is displaced by the urging force of the pushing spring 52, and the locking rod 54 integrated with the actuating portion 55 is retracted inside the fixed portion 53, The cord 56 was disengaged from the locking rod 54, and the fire damper without support was dropped. Since this conventional example does not directly support the weight of the fire damper by the thermal fuse 51, it has an advantage that it can be used for a large fire damper.

[0004]

[Problems to be solved by the device]

 In the conventional example for the large-scale fire-damping damper, when the weight of the fire-proof damper is applied to the locking rod 54 via the rope 56, the pushing force of the pushing spring is generated between the through hole 50 and the locking rod 54. Even if the thermal fuse 51 is blown, a large frictional force is generated, the locking rod 54 does not retract, and the fire damper does not fall. It is an object of the present invention to solve the above problems, and an object of the present invention is to provide a disconnection actuating tool for a fireproof damper in a fireproof device that solves the problem.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention separates the counterweight 26, which is a supporting member for maintaining the suspended state of the fire dampers 22a and 22b, and the lifting chain 27, which is a lifting member, from the fire damper which is dropped by its own weight. 22a and 22b are the disconnection actuating tools 1 in a fire protection device configured to shut off a transport passage 20 which is a passage installed in a building. A pair of levers 5 and 5 provided with protrusions 4 and 4 as locked portions are pivotally supported at predetermined intervals so that the levers 5 and 5 can be pivoted outwardly and opened, respectively, and the above-mentioned both. A thermal fuse 6 that is connected between the levers 5 and 5 and that can be fused at a predetermined temperature to prevent the levers 5 and 5 from opening, and is locked to the upper side of each of the protrusions 4 and 4 of the levers 5 and 5. Possible locking part It has configured by the interlocking member serving interlocking rod 8 of substantially nail-shaped having a section 7. The disconnection operation tool 1 is provided at a predetermined portion of a connection path from the fireproof dampers 22a, 22b to the counterweight 26 via the lifting chain 27, and specifically, is provided on the upper portion of the base portion 3. One end of the lifting chain 27 is connected, the other end is moved up and down in conjunction with each other, and is connected to the fire protection dampers 22a and 22b that can be divided into upper and lower two stages to shut off the passage when descending. The lower end of the connecting rod 8 is connected to the counterweight 26 having a weight substantially equal to that of the fire dampers 22a and 22b. Further, a drive motor 25 for moving the lifting chain 27 is attached in the middle of the lifting chain 27.

[0006]

[Action]

When the driving motor 25 is driven to move the hoisting chain 27 and hoist the fireproof dampers 22a and 22b, the carrier path 20 is opened and a self-propelled wagon (not shown) of the carrier device can be carried. At this time, in the disconnecting operation tool 1, the weights of the two fire protection dampers 22a and 22b are applied to the both projecting portions 4 and 4 through the head portion 7 to open the both levers 5 and 5. Such a force is acting. When a fire occurs with the fire dampers 22a and 22b being lifted in this manner, the temperature fuse 6 is melted by the heat of the fire and the levers 5 and 5 rotate outward to open the legs. Therefore, the distance between the protrusions 4 and 4 increases. Therefore, the head portion 7 passes between the locking projections 4 and 4, and the counter weight 26 drops together with the connecting rod 8, and at the same time, the fire protection dampers 22a and 22b that have lost their support also drop. As shown in FIG. 1, when the fire-proof dampers 22a and 22b are in a suspended state, the thermal fuse 6 is applied with a pulling force of L ₁ / L ₂ of the weight of the counterweight 26 due to the lever principle. .. Here, L ₁ is the length between the center point of the pivot 2 of the base 3 and the portion where the lower side of the head 7 is in contact with the protrusion 4, and L ₂ is the center point of the pivot 2. And the fixed portion of the lever 5 and the thermal fuse 6 are. If the length of the levers 5, 5 is made longer, the value of L ₂ becomes larger, so that the tensile force applied to the thermal fuse 6 can be made even smaller. Therefore, fire protection using a large fire damper is possible. It can be used for equipment.

[0007]

【Example】

 Hereinafter, a preferred embodiment of the present invention applied to a fire protection device provided in a transport path of a transport device will be described in detail with reference to the accompanying drawings. Here, FIG. 1 is a front view of a non-operating state, FIG. 2 is a front view of an operating state, and FIG. 3 is a fire protection device in which a closed state of a conveyance path is shown by a solid line and an opened state is shown by a chain double-dashed line. FIG. 4 is a side view of the fire protection device in which the conveyance path is similarly closed and the open state is similarly indicated by a two-dot chain line.

As shown in FIGS. 2 and 3, the disconnecting operation tool 1 of the present embodiment is provided with a connecting portion for connecting a lifting chain 27, which will be described later, in the vicinity of the upper end thereof, and a pair of them is provided at predetermined intervals. And a substantially inverted U-shaped base portion 3 provided with the pivot shafts 2 and 2, and pivotally supported on the pivot shafts 2 and 2 so that they can be opened to open legs, and the inner edges are provided with locked portions. And a pair of levers 5 and 5 formed with protrusions 4 and 4, and the levers 5 and 5 are fixed by being stretched over between the levers 5 and 5 to prevent the legs of the levers 5 and 5 from being opened. Temperature fuse 6 and a counterweight 26, which will be described later, can be connected to each other, and a head portion 7 that is a locking portion that can be locked while riding on the upper side of each protrusion 4, 4 of both levers 5, 5 is provided. The connecting rod 8 is a nail-shaped connecting member.

In the disconnecting operation tool 1, when the head 7 is locked on the upper sides of the protrusions 4 and 4, the weight of the counterweight 26 causes the levers 5 and 5 to move outwardly. It acts so as to open the leg by rotating it, while a tensile force acts on the thermal fuse 6 which blocks the opening. That is, as shown in FIG. 1, a tensile force of L ₁ / L ₂ of the weight of the counterweight 26 is applied to the thermal fuse 6 on the principle of leverage. Here, L ₁ is the length between the center point of the pivot 2 of the base 3 and the portion where the lower side of the head 7 contacts the protrusion, and L ₂ is the center of the pivot 2 and the lever 5 And the length between the thermal fuse 6 and the fixed portion. Therefore, if the lengths of the levers 5 and 5 are made longer, the value of L ₂ can be made larger, so that the tensile force applied to the thermal fuse 6 can be made arbitrarily small. As described above, even when both the fire protection dampers 22a and 22b, which will be described later, are large, heavy and large, the tensile force applied to the thermal fuse 6 should be small enough not to impose a mechanically unreasonable load on the thermal fuse 6. Is possible. When heat of a predetermined value or more is applied to the temperature fuse 6 in a state where the connecting rod 8 is connected to the base portion 3 in this way, the thermal fuse 6 is melted and the levers 5 and 5 are respectively rotated outward. The legs are moved to open the state, the gap between the protrusions 4 and 4 is widened, the head portion 7 passes through between the protrusions 4 and 4, and the counterweight 26 is cut off to disconnect the connection.

As shown in FIGS. 3 and 4, the fire prevention device in which the disconnection implement 1 is used is provided at a position corresponding to the boundary of the fire prevention section in the building on the conveyance path 20. This fire protection device is vertically guided by guide rails 21 and 21 on both sides of the fire protection damper support frame, which are erected on both sides of the conveyance path 20, and is vertically two-stepped so that the conveyance path 20 can be blocked when descending. The fire dampers 22a and 22b and one end thereof are fixed to the upper side of the fire damper support frame, and the other end is provided above the lifting sprocket 23 and the fire damper support frame provided on the front surface of the upper fire damper 22a. A lifting chain 27, which is a lifting member fixed to the separating operation tool 1 via a guide sprocket 24 and a drive motor 25, is provided. Further, both of the fire protection dampers 22a and 22b have one end fixed to the lower fire protection damper 22b, and a fixing frame 29 which can be fixed to the wall of the building through the interlocking sprocket 28 attached to the upper portion of the upper fire protection damper 22a. They are connected by an interlocking chain 30 having fixed ends. Further, a limit switch 31 for confirming that the fire protection dampers 22a, 22b are lifted and the transport path 20 is opened and fire protection dampers 22a, 22b are provided at the upper and lower positions of the one guide rail 21. A limit switch 32 is provided for confirming that the transport path 20 has been lowered and is closed. Each of the limit switches 31 and 32 is turned on by a striker (not shown) provided on the lower fire protection damper 22b, and an electric switch is connected to a switch (not shown) of the drive motor 25 so as to stop the drive motor 25. Connected to each other. Then, when the upper fire damper 22a is pulled up by the drive motor 25 through the hoisting chain 27, the lower fire damper 22b moves up to twice the distance of the upper fire damper 22a, and the one-dot chain line in FIG. Then, the drive motor 25 is stopped and the conveyance path 20 is opened. The counterweight 26 has a weight substantially equal to the combined weight of the two fireproof dampers 22a and 22b, and the state is maintained after the drive motor 25 is stopped.

When a fire occurs in the state where the above-mentioned fire-proof damper is lifted, the above-described disconnecting operation tool 1 attached between the end of the lifting chain 27 and the counterweight 26 operates to disconnect the counterweight 26, The fire dampers 21 and 22 are dropped by their own weight. 3 and 4, reference numeral 33 is a weight guide that guides the counterweight 26 from falling, and reference numeral 34 is a rail on which a self-propelled wagon of the transportation facility travels.

Explaining the operation of the above embodiment, the drive motor 25 is driven to move the hoisting chain 27, and the fire protection dampers 22a and 22b are hoisted to open the transportation path 20 so that the transportation equipment can be used. To do. At this time, in the disconnecting operation tool 1, the weight of the counterweight 26, which is almost equal to that of the fire dampers 22a and 22b, is applied to the protrusions 4 and 4 through the head portion 7, and the levers 5 and , 5 is applied to open the legs. By the way, the tensile force of L ₁ / L ₂ of the weight of the counterweight 26 is applied to the thermal fuse 6, but since L ₂ is considerably longer than L ₁ , the tensile force applied to the thermal fuse 6 is 6 is smaller than 6 so that the load is not mechanically unreasonable (see Fig. 1). When a fire occurs in such a state, the thermal fuse 6 is melted by the heat of the fire, the levers 5 and 5 are opened, the gap between the protrusions 4 and 4 is widened, and the head 7 is After passing between the protrusions 4 and 4 (see FIG. 2), the counterweight 26 is separated and falls. When the counterweight 26 is separated from the hoisting chain 27, the fireproof dampers 22a and 22b that have lost the supporting force for maintaining the hoisting state fall and the transport path 20 is closed.

The present invention is not limited to the above-described embodiment, and for example, the disconnecting operation tool 1 may be used upside down as compared with the case of the embodiment. Further, the part to which the disconnection actuating tool 1 is attached may be a predetermined part of the connection path from the upper fire-prevention damper 22a to the counterweight 26 serving as a supporting member through the hoisting chain 27 serving as a hoisting member. It may be between the damper 22a and the lifting chain 27 or at an intermediate portion of the lifting chain 27. Further, as the support member, a separate support member may be attached to the wall of the building without using the counter weight 26, and the connecting member or the base portion 3 may be fixed to this support member. Further, the hoisting member may be changed to another object such as a rope instead of the hoisting chain 27. In addition, the connecting rod 8 serving as the connecting member does not have to be the nail-shaped one as in the above embodiment, and the head 7 as the locking portion is not the nail head shape as in the above embodiment. However, another one may be used as long as it has a shape that can be locked to the protrusions 4 and 4 which are the locked parts. In addition, the protrusions 4 and 4 do not have to have the shapes shown in the drawings of the above embodiment.

[0014]

[Effect of the device]

 As described above, according to the present invention, since the tensile force applied to the thermal fuse is smaller than the weight of the fire damper when the fire damper is in a suspended state, the fire damper can be used even if it is large and heavy, and the fuse does not melt. When this is done, a large frictional force, etc. that prevents the separation operation is not generated anywhere, so the separation operation is reliable.

[0015]

[Brief description of drawings]

FIG. 1 is a front view of a disconnection actuating tool in a suspended state.

FIG. 2 is a front view of the disconnection actuating tool showing a state during operation when a fire occurs.

FIG. 3 is a front view of the fire protection device, in which a closed state of the transport path is shown by a solid line, and a similarly opened state is shown by a chain double-dashed line.

FIG. 4 is a side view of the fire protection device, in which the transport path is closed and the open state is indicated by a chain double-dashed line.

FIG. 5 is a vertical sectional front view of a conventional example.

[Explanation of symbols]

 1 Separation Actuator 2 Axis Part 3 Base Part 4 Projection Part 5 Lever 6 Temperature Fuse 7 Head 8 Connecting Rod 20 Conveyance Path 21 Guide Rails 22a, 22b Fire Damper 25 Drive Motor 26 Counterweight 27 Lifting Chain

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Naofumi Osaki 1-12-3 Yushima, Bunkyo-ku, Tokyo Within Japan Shutter Co., Ltd.

Claims (1)

[Claims for utility model registration] Claims: 1. A fire damper capable of moving up and down for blocking a passage, a lifting member for lifting the fire damper, and a lifting member for keeping the fire damper in a suspended state. A support member for supporting the member; and a disconnection actuating member provided at a predetermined portion of a connection path from the fireproof damper to the support member via the lifting member and separating the connection path to drop the fireproof damper. In the disconnection actuating tool of the fire protection device, a pair of levers each provided with a locked portion at an inner edge thereof are pivotally supported at predetermined intervals so as to be able to rotate outward, respectively. Side or a support member side, a temperature fuse that is connected between the two levers to prevent the levers from rotating and that can be blown at a predetermined temperature, Having a locking portion which can engage in each of the engaging portions of the levers, the separating operation device of fire dampers in fire protection apparatus constructed from a cooperative member for connecting to the support member side or fire dampers side of said path.