JPH0820100B2 - Thermal fuse for damper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION I. Objectives of the Invention (1) Field of Industrial Application The present invention is designed to keep the blade body of a damper provided in an air conditioning duct in an open lock state at all times and to prevent the blade body from being damaged when a fire occurs. The present invention relates to a damper thermal fuse for unlocking and automatically closing the lock.

(2) Conventional Technology Conventionally, in various buildings, factories, etc., a temperature fuse is provided with a damper in a fireproof compartment position of an air conditioning duct, and a blade body that is spring-biased in a closed state in the casing is installed in the casing. Air is supplied or exhausted at all times while keeping the lock in the open state in cooperation with each other.When a fire occurs, the temperature fuse is activated by the high temperature airflow flowing through the duct to unlock the open state of the blade. By forcibly rotating the blade body by the spring biasing force, the inside of the casing is closed to prevent smoke and fire.

By the way, in the temperature fuse that locks and holds the blade body in an open state, a fuse pin fitted and inserted in a metal cylinder is always spring-biased toward an end portion inside the casing, and one end of the fuse pin is Is protruded from the cap of the cylinder body while resisting the spring biasing force, and a flange member having a flange fixed to the other end of the fuse pin by a fuse metal is detachably fitted and mounted on the cylinder body. While locking the flange of the flange member with a locking tool, the opening and closing lever of the blade body is locked in the open state at one end of the fuse pin protruding from the cap, and protrudes into the damper casing when a fire occurs. The fuse metal thus melted melts at a high temperature, the lock of the blade body by the fuse pin is released, and the inside of the casing is automatically closed by the blade body.

(3) Problems to be Solved by the Invention However, after the thermal fuse once operates,
Since it is impossible to lock the fuse pin with the flange member, the fuse pin must be replaced with a new flange member, which requires expense and trouble.

Further, the conventional thermal fuse has a high heat capacity, and the fuse metal exposed in the duct is not released until the fuse is melted by the high heat of the hot air or smoke flowing in the duct. There were problems such as inferiority.

The present invention has been made in view of the above conventional problems, and an object thereof is to provide a notch opening exposed in an air flow path in a part of a protruding portion of a cylinder body of a temperature fuse protruding into a casing. And a lock mechanism that locks the operation plate of the rotary shaft of the damper blade at one end and locks the protruding portion at the other end of the fuse pin with a lock mechanism, and the lock mechanism is made of a shape memory alloy arranged in the cutout opening. By linking with a lock release mechanism that includes a coil spring, it is possible to easily restore the thermal fuse once it has been activated, and it is not necessary to replace the entire thermal fuse, saving costs and time, and in particular, An object of the present invention is to provide a thermal fuse for a damper, which has excellent reactivity and thermal response when the fuse pin is unlocked.

II. Structure of the Invention (1) Means for Solving the Problems In order to achieve the above-mentioned object, the generation of claim 1 is such that at least part of the protruding portion is provided in the flow path of the damper.
Which is a thermal fuse having a tubular body 26 including the projecting portion 24 having a cap 30 having a fuse pin hole 28 fixed at one end, and a tubular body 26 fitted and inserted into the tubular body 26 to provide the projecting portion. Department
One end 22a, which is constantly biased in the 24 direction and serves as an end on the operating side, projects from the fuse pin hole 28 of the cap 30 and is attached to the operating plate 20 of the rotary shaft 18 of the damper blade 16. And the protruding portion 24 of the fuse pin 22.
A lock mechanism 36 for holding the operating side end portion 22a of the fuse pin 22 in a state of protruding from the cap 30 while resisting the spring biasing force in the direction. It includes a cutout opening 38 exposed in the damper flow path, the cutout opening 38 is provided with a lock release mechanism 42 including a shape memory alloy coil spring 40, and the lock mechanism 36 is a damper flow path side of the fuse pin 22. A roller groove 44 provided in the notch opening 38 of the other end portion 22b and a roller 48 biased and supported so as to be constantly fitted in the roller groove 44, and the lock release mechanism 42, The fuse pin 22 is slidably provided on the damper flow path side 22b along the longitudinal direction of the fuse pin 22, and the roller 48 in the fitted state is guided along with the movement in the longitudinal direction and is released from the fitted state. Beveled notch 54 with slanted surface that engages and disengages Actuating cylinder having
The shape memory alloy coil spring 40 includes a shape memory alloy coil spring 40, and the shape memory alloy coil spring 40 is provided so as to penetrate the fuse pin 22 and is adjacent to the operating cylinder 52, and the ambient temperature rises to a transformation temperature. Changes the length of the fuse pin 22 and slides the operating cylinder 52 in the longitudinal direction of the fuse pin 22 to disengage the roller 48 from the roller groove 44 and unlock the roller 48 so that the urging spring causes the end of the fuse pin 22 to move. The damper temperature fuse 10a is formed by retracting and operating the portion 22a. Further, the invention according to claim 2 is a thermal fuse having at least a projecting portion 24 that is partially projected in the flow path of the damper, and a cap having a fuse pin hole 28.
A cylinder body 26 including the projecting portion 24 having 30 fixed to one end,
One end 22a, which is fitted and inserted in the cylinder main body 26, is always spring-biased in the direction of the projecting portion 24 and serves as an end portion on the operating side, is projected from the fuse pin hole 28 of the cap 30 so that the damper blade 16 Fuse pin 22 that engages with operating plate 20 of rotating shaft 18
And a lock mechanism 36 that holds the operating side end 22a of the fuse pin 22 in a state of protruding from the cap 30 while resisting the spring biasing force of the fuse pin 22 toward the protruding portion 24. The protruding portion 24 includes a cutout opening 38, a part of which is exposed to the damper flow path.
The lock release mechanism includes a shape memory alloy coil spring 40
The lock mechanism 36 includes a small-diameter shaft 58 formed by expanding in a stepped manner at the other end of the fuse pin 22, which is the damper flow path side 22b, and the small-diameter shaft 58 is elastically sandwiched. And a beak body 68 having a conical surface 70 which is provided so as to be pressed and which is formed so as to reduce its diameter toward the tip end direction of the small-diameter shaft 58 on the inner surface side. Provided slidably along the longitudinal direction of the fuse pin 22,
A pressing plate 72 that comes into contact with the conical surface of the beak body 68 at an angle that pushes the beak body open, and a pressing plate 72 that is inserted into the fuse pin 22 and that rises to a transformation temperature so that the pressing plate 72 has a small diameter. Push in the direction of the tip of the shaft 58 and the operating end of the fuse pin 22.
The shape memory alloy coil spring 4 for unlocking 22a.
0 and a damper thermal fuse 10b.

Further, the invention according to claim 3 is a thermal fuse having at least a projecting portion 24 which is partially projected in the flow path of the damper, and the cap 30 having the fuse pin hole 28.
Is a cylinder main body 26 including the protruding portion 24 fixed to one end, and one end 22a which is fitted and inserted into the cylindrical main body 26 and is always spring-biased in the direction of the protruding portion 24 and serves as an operating side end portion. Fuse pin 22 protruding from the fuse pin hole 28 of the cap 30 and engaged with the operating plate 20 of the rotary shaft 18 of the damper blade 16
And a lock mechanism for holding the fuse pin 22 in a state of protruding from the cap 30 while resisting the spring biasing force of the fuse pin 22 in the direction of the projecting portion 24.
36, the protrusion 24 includes a cutout opening 38, a part of which is exposed to the damper flow path, and the cutout opening 38 includes a lock release mechanism 24 including a shape memory alloy coil spring 40.
The lock mechanism 36 includes a support plate 74 protruding from the cylindrical body 26 to the cutout opening 38 of the protruding portion 24, a damper flow path side end 22b of the fuse pin 22, and the support plate. 7
The respective first and second arm rods 78a and 78b are pivotally attached to the tip end side of 4, and the other end portions of the intermediate pivotally attached portion 76c are pivotally attached to each other in a freely bendable manner, The lock release mechanism 42 locks the projecting state of the operating side end portion 22a of the fuse pin 22 in a state where the first and second arm rods 78a and 78b are continuously connected in a straight line. 2 arm rod 78
The a and 78b are rotatably pivotally mounted in the vicinity of the intermediate pivot portion 76c in the linearly connected state, and the first and second arm rods can be in the linearly connected state as they rotate, and A cam body that presses the intermediate pivotal portion to bend both arm rods from the intermediate pivotal portion into a V-shape, and a cam body whose one end is linked to the cam body and which is provided at the transformation temperature and has a length Displacing the cam body 84
By rotating the first and second arm rods 78a, 78b.
The temperature fuse 10 for a damper including the shape memory alloy coil spring 40 for releasing the lock of the operation side end portion 22a of the fuse pin 22 by bending in a shape while pressing
Composed of c.

Further, the invention according to claim 4 is a thermal fuse having at least a projecting portion 24 which is partially projected in the flow path of the damper, and the cap 30 having the fuse pin hole 28.
Is a cylinder main body 26 including the protruding portion 24 fixed to one end, and one end 22a which is fitted and inserted into the cylindrical main body 26 and is always spring-biased in the direction of the protruding portion 24 and serves as an operating side end portion. Fuse pin 22 protruding from the fuse pin hole 28 of the cap 30 and engaged with the operating plate 20 of the rotary shaft 18 of the damper blade 16
And a lock mechanism 36 that holds the operating side end 22a of the fuse pin 22 in a state of protruding from the cap 30 while resisting the spring biasing force of the fuse pin 22 toward the protruding portion 24. The protruding portion 24 includes a cutout opening 38, a part of which is exposed to the damper flow path.
The lock release mechanism includes a shape memory alloy coil spring 40
42, the lock mechanism 36, the roller receiving edge 86 provided at the damper flow path side end 22b of the fuse pin 22 protruding from the cylindrical body 26 to the notch opening 38 of the protruding portion 24,
A roller 48 that engages with the roller receiving edge 86 and locks the fuse pin 22 so as to maintain the projecting state of the operation side end portion 22a of the fuse pin 22, and a support rod 46 that axially supports the roller 46.
The lock release mechanism 42 is pivotally attached to a position near the end of the roller support rod 46 via a mounting tool 88, and holds the state in which the lock release mechanism 42 is engaged with the roller receiving edge 86 of the roller 48. And a cam main body 84 having an arcuate surface capable of sliding the roller 48 from the roller receiving edge 86, the cam body 84 and the cylinder main body 26.
The cam body is interposed between and displaces the length at the transformation temperature.
A temperature fuse 10d for a damper including a coil spring 40 made of a shape memory alloy for rotating the roller 84 to disengage the roller 48 from the roller receiving edge 86.

Further, the invention according to claim 5 is a thermal fuse having at least a projecting portion 24 which is partially projected in the flow path of the damper, and the cap 30 having the fuse pin hole 28.
Is a cylinder main body 26 including the protruding portion 24 fixed to one end, and one end 22a which is fitted and inserted into the cylindrical main body 26 and is always spring-biased in the direction of the protruding portion 24 and serves as an operating side end portion. Fuse pin 22 protruding from the fuse pin hole 28 of the cap 30 and engaged with the operating plate 20 of the rotary shaft 18 of the damper blade 16
And a lock mechanism 36 that holds the operating side end 22a of the fuse pin 22 in a state of protruding from the cap 30 while resisting the spring biasing force of the fuse pin 22 toward the protruding portion 24. The protruding portion 24 includes a cutout opening 38, a part of which is exposed to the damper flow path.
The lock release mechanism includes a shape memory alloy coil spring 40
42, the lock mechanism 36, the roller receiving end 90 provided on the damper flow path side end 22b of the fuse pin 22 protruding from the cylindrical body 26 to the notch opening 38 of the protruding portion 24,
The roller receiving end 90 is detachably arranged, and the roller receiving end 90
Roller 48 that locks and holds the protruding state of the operating side end portion 22a of the fuse pin 22 in the engagement state with the roller 48, and the direction in which the roller 48 is pivotally supported at the end portion and the roller 48 separates from the roller receiving end 90. Roller supporting rod 46 mounted so as to constantly urge the roller supporting rod 46 against the urging force of the roller supporting rod 46 so as to maintain the engagement state of the roller 48 at the roller receiving end 90. And a stop plate 94 connected to 46, the shape memory alloy coil spring 40 is inserted through the notch opening 38 of the fuse pin 22, and the end portion of the shape memory alloy coil spring 40. Is loosely fitted to the damper flow path side 22b of the fuse pin 22 and slidable in the longitudinal direction of the fuse pin 22, and abuts against the stop plate 94 to attach the roller 48 to the roller receiving end 90, Move the fuse pin 22 in the longitudinal direction to remove the contact state with the stop plate 94. And a roller 48 composed of the roller receiving end 90 of the frame body 92 in the width is fixed capable of Datsukakari from comprising damper temperature fuse 10e.

Further, the invention according to claim 6 is a thermal fuse having at least a projecting portion 24 which is partially projected in the flow path of the damper, and the cap 30 having the fuse pin hole 28.
Is a cylinder main body 26 including the protruding portion 24 fixed to one end, and one end 22a which is fitted and inserted into the cylindrical main body 26 and is always spring-biased in the direction of the protruding portion 24 and serves as an operating side end portion. Fuse pin 22 protruding from the fuse pin hole 28 of the cap 30 and engaged with the operating plate 20 of the rotary shaft 18 of the damper blade 16
And a lock mechanism 36 that holds the operating side end 22a of the fuse pin 22 in a state of protruding from the cap 30 while resisting the spring biasing force of the fuse pin 22 toward the protruding portion 24. The protruding portion 24 includes a cutout opening 38, a part of which is exposed to the damper flow path.
The lock release mechanism includes a shape memory alloy coil spring 40
42, the cylinder main body 26 is closed at its end by a closing plate 96, a frame rod 98 is projected from the cylinder main body 26 to the notch opening 38 of the projecting portion 24, the lock mechanism 36, The tube body 26
A plurality of protrusions 100 are provided on the inner side of the fuse pin 22, and a plurality of projections 100 are provided on the peripheral side surface of the fuse pin 22 and a first elongated hole 102a is formed at a central position. A state in which the fuse pin 22 is projected from the cap 30 by receiving a plurality of projections 100 of the linking body 104 against the spring bias of the fuse pin 22 which is provided in the position close to the closed plate 96. And a plurality of receiving pieces 106 for locking the fuse pin so as to hold the fuse pin, and the lock release mechanism 42 has a second elongated hole 102b formed in the closing plate 96.
And is threadedly extended from one end in the direction of the link 104 in a rotating manner at a predetermined angle, and the other end is the link.
The rotary drive elongated plate 108 inserted into the first elongated hole 102a of the frame 104 is interposed between the frame rod 98 and the rotary drive elongated plate 108, and the rotary drive elongated plate 108 is cut out at a predetermined temperature at a predetermined temperature. Rotation drive long plate 10 which rotates along the second long hole 102b while being drawn out.
The damper thermal fuse 10f having a coil spring 40 made of a shape memory alloy for rotating the linking body 104 at 8 to disengage the projection of the linking body 104 from the receiving piece 106 of the cylinder body 26. Composed.

A damper thermal fuse according to the invention of claim 7
In 10g, in order to prevent the roller 48 of the lock mechanism 36 and the operating cylinder 52 of the lock releasing mechanism 42 from being separated from each other, the outer edge groove of the oblique cutout groove 54 of the operating cylinder 52 in which the roller 48 is engaged is not formed. The closing rod 128 may be fixed.

(2) Action The temperature fuse for damper of the present invention is installed in a fireproof damper or the like to unlock the internal vanes while releasing the lock when a fire occurs. A cutout opening exposed in the air flow path is provided in a part of the protruding portion of the main body of the thermal fuse that protrudes into the casing of the damper, and is inserted into the main body of the cylinder to constantly bias the spring toward the protruding portion. The one end of the fuse pin is projected outward from the cylinder body while resisting the spring biasing force to lock the operating plate of the damper blade rotating shaft. In order to hold the operating plate locked by one end of the fuse pin, the other end of the fuse pin is locked by a lock mechanism, and the lock mechanism is made of a shape memory alloy arranged in the cutout opening of the protrusion. It is linked with a lock release mechanism including a coil spring.

Therefore, when a coil spring made of a shape memory alloy is heated by the high heat of hot air or smoke flowing through the casing of the damper in the event of a fire or the like, the coil spring expands and contracts to a memorized shape at a predetermined temperature and the lock release mechanism operates. When activated, the lock of the fuse pin by the lock mechanism is released. One end of the fuse pin is drawn into the cylinder body, and the damper blade rapidly rotates from the open state to close the inside of the casing.Even after the thermal fuse once operates, it can be easily restored. There is no need to replace the flange member of the fuse pin, which saves costs. Further, the shape memory alloy coil spring is appropriately expanded and contracted to unlock the fuse pin, so that the thermal fuse has excellent thermal responsiveness. In particular, the lock release mechanism linked to the shape memory alloy coil spring releases the lock with a slight force to operate the fuse pin in the biasing direction, so the thermal response is good and The certainty of is secured.

(3) Examples Hereinafter, preferred examples of the present invention will be described with reference to the accompanying drawings.

The damper thermal fuse 10 according to the embodiment of the present invention,
As shown in FIGS. 1 and 2, for example, the damper blade 16 axially supported by the casing 14 of the fireproof damper 12 is installed in the vicinity of the rotary shaft 18. Although the damper blades 16 are rotated by being fixed to the rotating shaft 18, the operating plate 20 fixed to the rotating shaft 18 is used.
Is fixed to one end 22a of the fuse pin 22 protruding to the outside of the damper thermal fuse 10, so that the damper blade 1
Hold the open state of 6.

As shown in the drawing, the damper thermal fuse 10 is configured by a fuse pin 22 provided in a cylindrical or rectangular tube main body 26 so as to be movable in the longitudinal direction. A part of the thermal fuse 10 for damper is projected and fixed in the casing 14, and includes a projecting portion 24 projecting in the casing 14.
As shown in FIG. 3, a cap 30 is fixed to one end of the same cylinder body 26, and a fuse pin hole 28 is formed in the center of the cap 30. And the fuse pin
One end of 22 is provided so as to be able to move in and out through the fuse pin hole.

A fuse pin 22 having a circular axis or a square axis is fitted and inserted in the cylinder body 26, and a biasing spring 32 is attached to the fuse pin 22. One end of the biasing spring 32 is received by the cap 30, and the other end thereof is received by the receiving plate 34 that is fixed to the fuse pin 22 in a penetrating manner. A spring is constantly biased toward the protruding portion 24 of the cylinder body 26. One end (operating side end) 22a of the fuse pin 22 is projected from a fuse pin hole 28 of the cap 30 while resisting the spring bias of the bias spring 32, and the one end 22a of the projected fuse pin 22 is formed. The operating plate 20 fixed to the rotary shaft 18 of the damper blade 16 is locked to maintain the open state of the damper blade 16.

At a position near the protruding portion 24, the cap 30 of the one end 22a of the fuse pin is resisted against the spring bias of the bias spring 32.
A lock mechanism 36 for holding the protruding state from is provided. Further, the projecting portion 24 includes a notch opening portion 38 which is partially exposed in the damper casing 14, and the notch opening portion 38 includes at least a coil spring 40 made of a shape memory alloy. A lock release mechanism 42 is provided and is linked to the lock mechanism 36.

Then, the coil spring 40 made of a shape memory alloy in the lock release mechanism 42 is heated by the high heat of hot air or smoke due to a fire or the like, and when the coil spring 40 reaches the transformation temperature, the coil spring 40 expands or contracts (or extends) to operate the lock mechanism 36. The fuse pin 22 is unlocked by the
The damper blades 16 are rotated directly to close the inside of the casing 14 by being drawn into the cap 30.

In the damper thermal fuse 10, a coil spring 40 made of a shape memory alloy is used as a lock release mechanism 42 for releasing the lock of the lock mechanism that holds the one end 22a of the fuse pin 22 protruding from the cap 30. Is arranged in the notch opening 38 of the projecting portion 24 of the cylinder body 26, and further, the coil spring 40 and another lock releasing member are combined and linked to each other, so that the thermal responsiveness is increased and the speed of the damper blade is increased. The closing operation is performed.

FIGS. 3 to 6 show a first damper thermal fuse 10a in which one embodiment of the lock mechanism 36 and the lock release mechanism 42 are described in detail.

In the figure, in the first damper thermal fuse 10a, a fuse pin 22 is fitted and inserted into a cylinder body 26 including the protruding portion 24, and a biasing spring 32 is attached to the other end protruding portion 22b of the fuse pin 22. The side (damper flow path side) is provided so as to project into the notch opening 38 of the projecting portion 24.

The lock mechanism 36 includes a roller groove 44 opened at a substantially intermediate position of the other end protruding portion 22b of the fuse pin 22, and the roller groove 44.
And a roller 48 that is biased and supported so as to always be fitted to. A substantially U-shaped roller support rod 46 is attached to the opposing outer peripheral position of the cylinder main body 26 so that the end thereof projects into the wall of the cylinder main body and the other end thereof extends along the longitudinal direction of the fuse pin 22. A roller 48 engaged with the roller groove 44 is pivotally supported at the end of the roller support rod 46.

The roller support rod 46 is an urging protrusion fixed at an end position of the cylinder body 26 with a gap from a mounting position on the cylinder body 26.
The end of the roller support rod 46 is always urged toward the roller groove 44 by being locked to the fuse pin 22.
Of the roller groove 44 when one end 22a of the
The roller 48 engages with the fuse pin 22 and is locked.

The lock release mechanism 42 has an operating cylinder 52 slidably fitted in a position near the end of the other end protruding portion 22b of the fuse pin 22 in the cutout opening 38. As shown in FIG. 5, the actuating cylinder 52 is provided with oblique cutout grooves 54 that engage with both ends of the roller 48 engaged with the roller groove 44.
The oblique cutout groove 54 has a groove bottom reaching the groove depth of the roller groove 44 as shown in the figure, and is continuously opened obliquely toward the damper flow path side of the fuse pin from the groove bottom to extend from the roller groove. It has an inclined surface connected to a height enough to be removed, and when the operating cylinder 52 slides in the longitudinal direction of the fuse pin, it guides the roller 48 in the fitted state and disengages it from the fitted state. The roller 48 is removed from the groove.

As the operating cylinder 52 slides in the longitudinal direction of the cylinder main body 26, the inclined surface of the oblique cutout groove 54 pushes the roller 48 outward to disengage it from the roller groove 44.

Further, the stop pin 56 of the operating cylinder 52 is fixed to the end of the other end projecting portion 22b of the fuse pin.

A fuse pin is provided in the gap between the operating cylinder 52 and the cylinder body 26.
A coil spring 4 made of a shape memory alloy on the other end protruding portion 22b of 22.
0 is fitted, and both ends of this coil spring 40 are actuating cylinders 52
And the cylinder body 26.

When the coil spring 40 is heated to, for example, 72 ° C. or higher when a fire or the like occurs, the coil spring 40 contracts as a shape memory alloy at a predetermined temperature. Then, as shown in the partial views of FIG. 5 and abc, the operating cylinder 52 slides while being retracted by the coil spring 40, and the oblique cutout groove 54 of the operating cylinder 52 causes the roller 48 to pass the fuse pin 22.
The other end of the protruding portion 22b is pushed out from the roller groove 44 and released to disengage, so that the fuse pin 22 is unlocked, and the fuse pin 22 is slid toward the protruding portion 24 of the cylinder body 26 by the spring biasing force of the biasing spring 32. The fuse pin 22 has one end 22a attached to the cap 30
Is drawn in. As a result, the engagement lock state between the operating plate 20 and the fuse pin 22 is released, and the damper blade 16 is rotated in the urging direction of the urged rotating shaft to cause the casing 14 to move.
The inner flow path is closed.

When the other end protruding portion 22b of the fuse pin 22 is pushed toward the cylinder body 26 with the fuse pin 22 unlocked, the roller 48 is engaged with the roller groove 44 and the operating cylinder 52 also returns to the coil spring 40. By the extension, the slant notch groove 54 is engaged with the roller 48 by sliding to the original position, and the fuse pin 22 is locked again.

Therefore, in the first damper temperature fuse 10a, the coil spring 40 made of the shape memory alloy of the lock release mechanism 42 is disposed in the notch opening 38 of the protrusion 24 of the cylinder body 26 and is exposed in the damper. , When the fire occurs, the thermal response of the coil spring 40 to the hot air and the high heat of smoke flowing through the damper is fast, the fuse pin 22 can be unlocked promptly, and the flange pin can be replaced easily after the operation. Such trouble and cost will be saved.

Further, when the shape memory alloy coil spring 40 is contracted, the roller 48 slides or rolls on the inclined surface of the oblique cutout groove 54 so that the roller 48 slides out of the roller groove 44. It operates even if the operating force is small, and therefore the reaction is fast, and as a result, an expensive shape memory alloy coil spring can be configured with a thin wire diameter, resulting in low cost and excellent practicability.

Further, the structure is simple, there is no failure, and no malfunction occurs. Further, since the configuration is simply using two springs, the spring force can be easily set.

Further, as shown in FIG. 6, the coil spring 40 made of a shape memory alloy has the other end protruding portion 22 of the fuse pin 22 in the gap between the end portion of the other end protruding portion 22b of the fuse pin 22 and the operating cylinder 52.
May be mounted on the b side. At this time, the coil spring 40 is made of a shape memory alloy having a property of expanding at a predetermined temperature. As a shape memory alloy, it is difficult to ionize compared to conventional metal fuses by soldering.For example, by selecting Cu-Zn-Al or Ti-Ni system, rust and corrosion are prevented to prevent malfunction and malfunction of fuse. Never occur.

Next, FIGS. 7 to 9 show a second damper-like thermal fuse 10b having a lock mechanism 36 and an unlock mechanism 42 of another embodiment.

In the figure, in the second damper thermal fuse 10b, the fuse pin 22 is fitted and inserted into the cylinder body 26 including the protruding portion 24, and the biasing spring 32 is attached. It is provided so as to project into the notch opening 38 of the projecting portion 24.

The lock mechanism 36 includes a small diameter shaft 58 provided at the end of the other end protruding portion 22b of the fuse pin 22 in the cutout opening 38, and the cap at one end of the fuse pin 22 by pinching the small diameter shaft 58. And a beak body 68 for locking the fuse pin 22 while keeping the protruding state from 30.

In the figure, a small-diameter shaft 58 is formed in a stepped shape at the other end portion 22b of the fuse pin 22 on the damper flow path side.
Is provided.

On the other hand, as shown in FIGS. 8 and 9, it is formed in a semi-circular plate shape including the cutout opening 38, and is pivotally attached to the cylinder body 26 to provide a pair of open / close plates 62, 62. This open / close plate 62,
In order to keep the opening / closing plates 62 and 62 normally closed, one end is U-shaped bent 64, 64 on the inner surface of the opening / closing plates 62, 62 to be locked to the cylinder body 26 and fixed to the opening / closing plates 62, 62. The spring rods 66, 66 of the spring rods 66, 66 are provided.
8 and 68 are fixedly supported.

The opening / closing plates 62, 62, the spring rods 66, 66, and the beak bodies 68, 68 constitute an opening / closing beak body 60.

The beak bodies 68, 68 have a semi-cylindrical shape, and the inner surface has the opening / closing plate.
The conical surfaces 70, 70 are formed so that the diameter thereof is reduced from one end facing the 62, 62 toward the tip end portion of the small diameter shaft 58.

The beak bodies 68, 68 are closed by the spring urging force of the spring rods 66, 66, and the beak bodies 68, 68 are pinched and locked so as to elastically pinch the small diameter shaft 58, and one end 22a of the fuse pin 22. The cap 3
It retains the protruding state from 0.

The unlocking mechanism 42 is slidably fitted to the other end protruding portion 22b (end portion on the damper flow path) of the fuse pin 22, and is fitted to the conical surfaces 70, 70 of the pair of beak bodies 68, 68. Body 6
The pressing plates 72 that are in contact with each other at an angle that pushes and opens 8 and 68 and the other end protruding portion 22b of the fuse pin 22 are attached to the conical surfaces 70 and 70 while sliding the pressing plates 72 at a predetermined temperature. And a coil spring 40 made of a shape memory alloy for pressing to open the beak bodies 68, 68, and both ends of the coil spring 40 are locked to the end portion of the cylinder body and the pressing plate 72. . In the embodiment, as shown in FIG. 9, the pressing plate 72 is formed in a disk shape, penetrates the fuse pin 22, and is provided so as to be substantially orthogonal to the longitudinal direction thereof. Therefore, when this pressure plate moves along the fuse pin, the small diameter shaft 58
The conical surface 70 whose diameter is reduced in the direction is pushed open as shown by the arrow. In the embodiment, the inner surface side of the beak body 68 is formed as a conical surface, but it is not planar and may be provided at intervals and may be composed of a frame plate, legs, etc. along such a conical surface. It is sufficient that the beak body 68 is pushed open from the inside with respect to the linear movement of the pressing plate 72.

When a fire occurs, the coil spring 40 of the lock release mechanism 42
When heated with high heat, the pressing plate expands at a predetermined temperature.
72 slides toward the end of the other end projecting portion 22b of the fuse pin, and the pressing plate 72 presses the inner conical surfaces 70, 70 of the beak bodies 68, 68 to open the fuse pins 68, Edge protrusion
The lock of 22b is released, the fuse pin 22 slides toward the protruding portion 24, and one end 22a of the fuse pin 22 has the cylinder body 2
6 is pulled into the cap 30. The fuse pin 22
When the beak bodies 68, 68 with which the pressing plate 72 is in contact are further opened when the is locked again, the pressing plate 72 slides to the original position while the coil spring 40 returns to the contracted state, and the beak bodies 68, 68 are returned. Is closed by the spring rods 66, 66, the other end projecting portion 22b of the fuse pin 22 is pressed toward the tubular body 26, and the small diameter shaft 58 is pushed into the beak bodies 68, 6
Lock with 8 and lock the fuse pin 22.

Therefore, also in the second damper thermal fuse 10b, the coil spring 40 made of the shape memory alloy of the lock release mechanism 42 is arranged in the notch opening 38 of the projecting portion 24 of the cylinder body 26 and is exposed in the damper. Therefore, when a fire occurs, the thermal response of the coil spring 40 to the hot air and smoke that flows through the damper is fast, the fuse pin 22 can be unlocked quickly, and the flange member can be easily restored after operation. This saves the trouble of replacing and the cost.

In particular, when the shape memory alloy coil spring 40 is extended, it engages with the conical surface that has been reduced in diameter in the small-diameter axial direction at an angle that pushes the beak body open. It is highly likely. Further, a thin type shape memory alloy coil spring operates reliably, and the manufacturing cost is low. In addition, since the structure is basically composed of a beak body that holds the small-diameter shaft 58 in an open / closed manner and a shape memory alloy coil spring, the structure is relatively simple and easy to manufacture. Since it is sufficient to set the force by the two springs, the operating point can be easily set.

Next, FIGS. 10 to 12 show a locking mechanism of another embodiment.
A third damper thermal fuse 10c including a lock release mechanism 42 and a lock release mechanism 42 is shown.

In the figure, in the third damper thermal fuse 10c, the fuse pin 22 is fitted and inserted into the cylinder body 26 including the projecting portion 24, and the biasing spring 32 is attached, and the other end protruding portion 22b of the fuse pin 22 is shown. Are partially projected to the notch opening 38 of the projecting portion 24.

The lock mechanism 36 includes a pair of support plates 74, 74 protruding from the cylinder body 26 to the cutout opening 38, and the support plate 7
The first end of which one end is pivotally attached 76a to a shaft connected to the ends of 4, 74
An arm rod 78a and a second arm rod 78b, one end of which is pivotally attached to the end of the other end projecting portion 22b of the fuse pin, are provided.
The ends of the second arm rods 78a and 78b that are directly opposed to each other are pivotally attached to each other.
At the position below the line connecting a and 76b, the intermediate pivot portion 76
The fuse pin 22 is pivotally attached as c and is locked so as to maintain the protruding state from the cap 30 by the linear connection of the first and second arm rods 78a and 78b. This intermediate pivot portion 76c is the first,
The second arm rods 78a, 78b are connected in a link rod-like manner,
The other end portions of the intermediate pivot portion are pivotally attached to each other in a V-shape. Since the intermediate pivot portion 76c is located below the line connecting the pivot joints 76a and 76b,
The second arm rods 78a and 78b are bent downward by the spring biasing force of the fuse pin 22. And the receiving plate 80 that prevents this
Are fixed to the lower surfaces of the support plates 74, 74.

In this embodiment, the lock release mechanism 42 includes the first and second lock release mechanisms.
A cam body 84 which is axially supported by a shaft 82 provided on the support plates 74, 74 and abuts the first and second arm rods 78a, 78b at a position in the vicinity of a lower portion of the intermediate pivoting portion 76c of the arm rods 78a, 78b; To rotate the cam body 84, the cam body 84 and the coil spring 40 made of a shape memory alloy are provided between the cylinder body 26 and the support plate 74.

The cam body 84 can keep the first and second arm rods in a linearly connected state as the cam body 84 rotates in association with the coil spring 40, and presses the intermediate pivotally connecting portion to move the intermediate pivotally connecting portion from both sides. Arm rod
78a and 78b are bent into a shape.

In the present embodiment, due to a fire or the like, the coil spring 40
Is heated to a predetermined temperature and contracts, the cam body 84 pivotally supported by the shaft 82 rotates about 30 degrees to pivot the intermediate pivot portion 76c.
The first and second arm rods 7 are pressed in order to push upwards the line connecting 76b.
As shown in FIG. 12, 8a and 78b are bent into a mold shape, and the fuse pin 22 is unlocked. When returning the lock, the first and second arm rods 78a, 78b bent in the shape of a die are pressed downward to return straightly, and the pivot point 6c is moved below the line connecting the pivot points 76a, 76b. Displace and lock the fuse pin 22.

Therefore, also in the third damper thermal fuse 10c, the coil spring 40 made of the shape memory alloy of the lock release mechanism 42 is arranged in the notch opening 38 of the projecting portion 24 of the cylinder body 26 and is exposed in the damper. Therefore, when a fire occurs, the thermal response of the coil spring 40 to the hot air and smoke that flows through the damper is fast, the fuse pin 22 can be unlocked quickly, and the flange member can be easily restored after operation. The same effects as described above can be obtained, such as the time and effort required for replacement and the cost savings. In particular, since a booster such as the cam body 84 is used to break the link with a little force to instantly activate the biasing spring, the thermal response of the fuse is extremely good, and the reaction is quick, The operation is reliable, and low-cost manufacturing and mass production are possible. Further, the structure is simple, there is no failure, the operation is reliable, and the spring force can be easily set.

Next, FIGS. 13 to 15 show a fourth damper thermal fuse 10d having a locking mechanism 36 and an unlocking mechanism 42 of another embodiment.

In the figure, in the fourth damper temperature fuse 10d, the fuse pin 22 is fitted and inserted into the cylinder body 26 including the protruding portion 24, and the biasing spring 32 is attached, and the other end protruding portion 22b of the fuse pin is It is provided so as to project into the notch opening 38 of the projecting portion 24.

The lock mechanism 36 is a damper flow path side end portion of a fuse pin projecting from the cylinder body 26 to the cutout opening 38 of the projecting portion 24.
A roller receiving edge 86 provided on 22b and a substantially U-shaped roller supporting rod fixed to the cylinder body 26 along the fuse pin 22.
46 and a roller 48 which is axially supported by the end of the roller support rod 46 and which is engaged with the roller receiving edge 86 and holds the fuse pin 22 in a protruding state from the cap 30.

The lock release mechanism 42 is a pair of substantially U-shaped fixtures that are fixed so as to face the positions near the ends of the roller support rods 46.
The other end of the fuse pin is pivotally attached to the gap 88, 88
It has a cam body 84 in contact with 22b. In the figure, the cam body 84 has an arcuate surface that can hold the state of being engaged with the roller receiving edge 86 of the roller 48 and can slide the roller 48 off the roller receiving edge 86. A coil spring 40 made of a shape memory alloy is interposed between the cam body 84 and the cylinder body 26. Then, while the coil spring 40 is contracted at a predetermined temperature, the cam body 84 is rotated to press the other end protruding portion 22b of the fuse pin while pressing the roller support rod 46 and the roller 48 together. More disengaged.

Therefore, also in the fourth damper thermal fuse 10d, the lock mechanism 36 and the lock release mechanism 42 are also provided in the cutout opening 38 of the projecting portion 24 of the cylinder body 26, so that the interior of the damper is protected when a fire occurs. When the coil spring 40 of the lock release mechanism 42 is directly heated by the high heat of the hot air and smoke flowing therethrough, the coil spring 40 contracts at a predetermined temperature and the cam body 84 rotates while the roller support rod 46 and the roller 48 are rotated. And the roller receiving edge
The fuse pin 22 is released from 86 to unlock the fuse pin 22. Accordingly, when the fuse pin 22 is unlocked, the thermal response is fast and appropriate, and when the fuse pin 22 is returned from the unlocked state and locked again, the end of the other end protruding portion 22b of the fuse pin is The fuse pin 22 can be easily locked by pressing in the direction of the cylinder main body 26 and engaging the roller 48 with the roller receiving edge 86 at the end portion, and the fuse pin 22 can be easily restored after the operation and the flange member can be replaced. This saves time and money. In particular, since the cam body 84 and the shape memory alloy coil spring are directly connected and the arc surface of the cam body separates the roller from the roller receiving edge, it reliably responds to heat even if the operating force is small. To do. Moreover, the structure is simple and the spring force can be easily set.

Next, FIGS. 16 and 17 show a locking mechanism of another embodiment.
36 and a fifth damper thermal fuse 10e having an unlocking mechanism 42 is shown.

In the figure, in the fifth damper thermal fuse 10e, the fuse pin 22 is fitted and inserted into the cylinder body 26 including the protruding portion 24, and the biasing spring 32 is attached, and the other end protruding portion 22b of the fuse pin is It is provided so as to project into the notch opening 38 of the projecting portion 24.

The lock mechanism 36 has a protruding portion at the other end of the fuse pin.
A roller receiving end 90 that is grooved at the end position of 22b, and a substantially U-shaped roller support rod 46 that is engaged with the cylinder main body 26 and projects from the other end protruding portion 22b of the fuse pin. The roller support rod 46 has an end portion, and the fuse pin 2 is engaged with the roller receiving end 90 at the end portion of the other end protruding portion 22b of the fuse pin.
The roller 4 for holding the protruding state of 2 from the cap 30
8 are suspended.

Further, the roller support rod 46 is received by a biasing projection 50 fixed at an end position of the cylinder body 26 with a gap from a locking position with respect to the cylinder body 26, and the other end projecting portion of the fuse pin is received. It is always urged in the direction to leave from 22b. Due to this biasing force, the roller body rod 46 is slid from the other end projecting portion 22b of the fuse pin so that the top body 92 slides to a position from the end of the other projecting portion 22b of the fuse pin. A stop plate 94, which is freely loosely fitted and fixed at a position from the end of the roller support rod 46, is brought into contact with the top body 92 to lock the fuse pin 22. That is, this frame body 92
Is loosely fitted on the damper channel side of the fuse pin and slidable in the longitudinal direction of the fuse pin, and abuts against the stop plate 94 to engage the roller with the roller receiving end and move in the longitudinal direction of the fuse pin. Then, the contact state with the stop plate 94 is released, and the roller 48 is formed in a width and a size that allow the roller 48 to be disengaged from the roller receiving end 90.

As the unlocking mechanism 42, the frame body 92 and the cylinder body
In the gap with the end of 26, the other end protrusion of the fuse pin
A coil spring 40 made of a shape memory alloy is fitted to 22b,
Both ends of the coil spring 40 are locked to the top body 92 and the end of the tube body 26.

When the coil spring 40 is heated to a predetermined temperature in the event of a fire or the like, the coil spring 40 contracts and the top body 92 slides along the other end projecting portion 22b of the fuse pin, and the roller supporting rod. 46 moves in the biasing direction, the roller 48 is disengaged from the roller receiving end 90 of the other end projecting portion 22b of the fuse pin, and the fuse pin 22 is unlocked.

When the fuse pin 22 is to be locked again after the lock is released, the other end protruding portion 22b of the fuse pin is pushed in the direction of the cylinder main body 26, and the roller 46 is moved to the roller receiving end 90.
The fuse pin 22 is fixed to the cam body 92 by sliding the top body 92 together with the coil spring 40, which is extended back, toward the end of the other end protruding portion 22b of the fuse pin. Locked. Therefore, also in the fifth damper temperature fuse 10e, the lock mechanism 36 and the lock release mechanism 42 are the same as the cutout opening portion of the projecting portion 24 of the cylinder body 26.
Since it is installed in 38, the coil spring of the unlocking mechanism 42 due to the high heat of the hot air and smoke flowing through the damper in the event of a fire
The 40 is directly heated to operate promptly, and the thermal response at the time of unlocking the fuse pin 22 operates quickly and accurately. It is easy to return the fuse pin 22 from the locked or unlocked state and then relock it, and the labor and cost of replacing the flange member after the operation is once saved. In particular, in the embodiment, the top body 92 stops the movement of the stop plate 94 which holds the engagement state at the roller receiving end of the roller,
The roller support rod 46 moves in the urging direction to disengage the roller from the roller receiving end simply by moving the top body 92 linearly in accordance with the contraction or extension of the coil spring. It reacts sensitively to the displacement at and also ensures the operation of the damper blades. The structure is simple and practical, and the spring force can be set easily.

Next, FIGS. 18 to 22 show a sixth damper thermal fuse 10f having a lock mechanism 36 and an unlock mechanism 42 according to another embodiment.

In the figure, the sixth damper temperature fuse 10f is closed by fixing a closing plate 96 to the end of the cylinder body 26,
A frame rod 98 is projectingly provided in the notch opening 38 of the projecting portion 24 of the cylinder body 26.

The fuse pin 22 is fitted and inserted in the cylinder body 26 including the projecting portion 24, and the biasing spring 32 is attached. One end 22a of the fuse pin 22 is abutted against the spring bias of the biasing spring 32. It is projected from the cap 30 of the cylinder body 26.

In this embodiment, the lock mechanism 36 is provided continuously with the fuse pin 22 in the cylinder body 26, and has a plurality of protrusions 100 protruding at least on the peripheral side surface thereof and at the center position thereof.
It has a linking body 104 in which the long hole 102a is opened. In the embodiment, the linking body 104 is formed of a hollow cylindrical body that is closed on the connection side with the fuse pin 22 and that can receive a rotation drive long plate described later, and the other end side is formed with the first long hole 102a. It is closed by the punched receiving plate. The linking body 104 may be a wall body such as a plate having the first elongated hole 102a into which the rotation-driving elongated plate can be loosely fitted. Further, in order to receive the plurality of projections 100 of the linking body 104 against the spring bias of the biasing spring 32 of the fuse pin 22, at the inner surface position near the closing plate 96 at the end of the cylinder body 26. The receiving piece 106 of the fuse pin 2 is fixed, whereby the fuse pin 2
The one end 22a of 2 is locked while the protruding state from the cap 30 is maintained. The unlocking mechanism 42
Is inserted into the second elongated hole 102b formed in the closing plate 96 at the end portion of the tube body 26, and about 4 mm from one end portion toward the linking body 104.
The other end, which is twisted and extended about 5 degrees, is connected to the link member 104.
A rotary drive elongated plate 108 fitted into the first elongated hole 102a of
A coil spring 40 made of a shape memory alloy is interposed between the rotary drive long plate 108 and the frame rod 98.

When the coil spring 40 is heated to a predetermined temperature in the event of a fire or the like, the coil spring 40 contracts to pull out the rotary drive elongated plate 108 toward the frame rod 98, and the second elongated hole 102b of the closing plate 96. The rotation driving long plate 108 fitted with the rotation automatically rotates, and the linking body 104 linked to the rotation driving long plate 108 is also rotated at the same time through the first elongated hole 102a, and the protrusion 10 on the peripheral side surface of the linkage 104.
0 is disengaged from the receiving piece 106, and the linking body 104 has the closing plate 9
The fuse pin 22 is unlocked by being pushed out to 6.

In order to re-lock the unlocked fuse pin 22, a key-shaped elongated hole 110 as shown in FIG. 22 is opened in the cylinder body 26, and the lock pin 12 fixed to the link body 104 is The key-shaped elongated hole 112 is projected to the outside. The lock pin 112 engages with the key portion of the key-shaped elongated hole 110 when the link body 104 rotates, and is parallel to the barrel body 26 of the key-shaped elongated hole 110 when the link body 104 moves toward the barrel body 26. Engage with a long hole. Therefore, when the fuse pin 22 is locked, when the lock pin 112 is gripped and the link body 104 is moved and rotated along the key-shaped slot 112, the projection 100 of the link body 104 causes the receiving piece 1 to move.
One end 22a of the fuse pin 22 attached to 06 is locked by being projected from the cap 30.

Therefore, also in the sixth damper temperature fuse 10f, since the lock mechanism 36 and the lock release mechanism 42 are also provided in the cutout opening 38 of the projecting portion 24 of the cylinder body 26, the interior of the damper is protected when a fire occurs. The coil spring 40 of the lock release mechanism 42 is directly heated by the high heat of the hot air and smoke flowing therethrough and operates promptly, and the thermal response at the time of the lock release of the fuse pin 22 operates quickly and accurately. It is also easy to restore the fuse pin 22 from the state after the lock is released and lock it again, and the labor and cost of replacing the flange member after the operation once is saved. The operation is reliable because it is operated by the rotational movement of the rotary drive long plate.

Next, FIGS. 23 to 27 show a seventh damper thermal fuse 10g including a lock mechanism 36 and an unlock mechanism 42 of another embodiment.

In the figure, the seventh damper thermal fuse 10g has a fuse main body 26 including the projecting portion 24 in which a fuse pin 22 is fitted and an urging spring 32 is attached. While resisting, one end (operating side end) 22a of the fuse pin 22
Is protruded from the fuse pin hole 28 of the cap 30 of the cylinder body 26, and the other end protruding portion (damper flow path side) 22b of the fuse pin 22 is projected to the notch opening 38 of the protruding portion 24.

As shown in FIGS. 26, 24, and 25, the lock mechanism 36 is provided with a roller groove 44 opened at a substantially intermediate position of the other end protruding portion 22b of the fuse pin 22, and along the fuse pin 22. A substantially U-shaped roller support rod 46 that is engaged with the cylinder body 26 and is urged so that its end portion contacts the fuse pin 22, and the roller groove 44 axially supported by the end portion of the roller support rod 46. It has a roller 48 that engages with the. When one end (operation side end) 22a of the fuse pin 22 is projected from the cap 30, the roller 48 is engaged with the roller groove 44 and the fuse pin 22 is locked.

The lock release mechanism 42 is slidably fitted in a position close to the end of the other end protruding portion (damper flow path side) 22b of the fuse pin 22 protruding from the cylinder body 26 in the cutout opening 38. The operating cylinder 52, and the biasing spring 114 fitted to the fuse pin 22 in the interval between the operating cylinder 52 and the cylinder body 26.
And have.

As shown in FIGS. 24 to 26, the operating cylinder 52 is formed with oblique cutout grooves 54 which are engaged with both ends of the roller 48 engaged with the roller groove 44 from the peripheral side surface. 52 outer end surface 116
A plurality of support rods 118 are provided so as to project on the peripheral edge of the. A small diameter shaft 122 is projected from the inside of the operation cylinder 52 to the fuse pin 22 via a step portion 120 so as to correspond to the plurality of support rods 118, and a seat 124 is loosely fitted to the small diameter shaft 122. A receiving plate 126 that is in contact with the supporting rod 118 of the operating cylinder 52 is fixed to the tip.

At the interval between the receiving plate 126 and the receiving seat 124, the coil spring 40 made of a shape memory alloy that expands at high temperature is attached to the small-diameter shaft 12.
Fitted in 2.

The characteristic feature of the seventh thermal fuse 10g for damper is that the roller 44 of the roller support rod 46 is closed at the outer edge open groove of the oblique cutout groove 54 so as not to be separated from the oblique cutout groove 54 of the operating cylinder 52. 128 is fixed.

As a result, even when the lock is released, the roller is always held in the oblique cutout groove of the actuating cylinder.
Unlike the lock mechanism and the unlock mechanism as shown in the figure, only the fuse pin is used without pressing the fuse pin toward the cylinder main body while fitting the roller in the oblique cutout groove of the operating cylinder and performing the return operation. The return lock after unlocking can be easily performed only by the pressing operation of.

Then, as shown in FIG. 26, when the fuse pin 22 is locked, the roller 48 axially supported by the end portion of the roller support rod 46 and held in the oblique cutout groove 54 of the operating cylinder 52.
Is locked in the roller groove 44 of the other end protruding portion 22a of the fuse pin 22, and the fuse pin 22 is locked.
The receiving plate 126 at the tip of the small-diameter shaft 122 of 22 is a support rod 118 of the operating cylinder 52.
The coil spring 40 made of a shape memory alloy is contracted so that both ends thereof are received by the receiving plate 126 and the receiving seat 124.

Therefore, when a fire occurs, the hot air flowing through the damper,
Due to the high heat of smoke, the coil spring 40 made of the shape memory alloy of the lock release mechanism 42 is directly heated and expanded, and the actuating cylinder 52 moves toward the cylinder body 26 direction via the seat 124 against the elastic force of the biasing spring 114. While being pressed and slid, the slant notch groove 54 moves the roller 48 into the roller groove.
When the fuse pin 22 is detached from the cylinder 44, the lock is released and the fuse pin 22 is projected from the cylinder body 26 as shown in FIG.

Next, when the fuse pin 22 is restored from the state after unlocking and is locked again, as shown in FIG. 27,
The roller 48 is blocked by the closing rod 128 and the oblique cutout groove 5 of the operating cylinder 52
Fuse pin 22 because roller 48 is retained in
The roller 48 can be engaged with the roller groove 44 and the fuse pin 22 can be easily locked as shown in Fig. 26 by simply pressing the end of the fuse in the direction opposite to the arrow. Also, in this case, the labor and cost of replacing the flange member after the operation is once saved.

Further, when the shape memory alloy coil spring 40 is extended at the transformation temperature, the roller 48 slides or moves on the inclined surface of the oblique cutout groove 54 so that the roller 48 slides out of the roller groove 44. It is possible to provide a damper that operates even if the operating force of the coil spring 40 is small, and therefore has a quick reaction, is low in cost, and is extremely practical.

III. Effect of the Invention As described above, according to the thermal fuses of claims 1 to 7, the biasing spring that constantly biases the fuse pin in the flow path of the damper is arranged in the cylinder body.
A lock mechanism that locks and holds a part of the cap of the cylinder main body against the urging force of the urging spring is provided, and further exposed to the damper flow path at the protruding portion of the damper temperature fuse. A cutout opening is provided, a coil spring made of a shape memory alloy is arranged in the cutout opening to form a part of the lock release mechanism, and this coil spring is combined with a sloped surface, a tapered surface, a cam, etc. It is possible to sensitively react with the operating force to release the lock and perform the closing operation of the damper blade. Also,
Even a thin shape memory alloy coil spring works reliably,
Not only is the material cost low, but the reaction to heat is rather sharp. Further, the structure is simple, the manufacturing efficiency is good, there are few failures, and no malfunction occurs.

In the damper thermal fuse according to claim 1, when the shape memory alloy coil spring is contracted, the roller slides or rolls on the inclined surface of the oblique cutout groove so that the roller slides out of the roller groove. Therefore, the coil spring operates even if the operating force is small, and therefore the reaction is fast, and the expensive shape memory alloy coil spring can be configured with a thin wire diameter, resulting in low cost and excellent practicality. Play. Moreover, the structure is simple, and no malfunction occurs.

In the thermal fuse for damper according to claim 2, when the shape memory alloy coil spring is extended, the conical surface contracted in the small diameter axial direction is brought into contact with and engaged at an angle such that the beak body is pushed open. Therefore, the operating force of the coil spring is small. Also works and has high thermal response.
Further, a thin type shape memory alloy coil spring operates reliably, and the manufacturing cost is low.

In the thermal fuse for damper according to the third aspect of the present invention, a booster such as a cam body is used, and the link is broken with a small force to instantly activate the biasing spring. Therefore, the thermal response of the fuse is extremely high. Good, quick reaction, reliable operation, and low cost production and mass production are possible.

In the damper thermal fuse of claim 4, since the cam body and the coil spring made of a shape memory alloy are directly connected and the arc surface of the cam body separates the roller from the roller receiving edge, even if the operating force is small. Responsive to heat.

In the damper thermal fuse according to claim 5, the top body stops the movement of the stop plate that holds the engagement state at the roller receiving end of the roller, and the top body linearly follows the contraction or extension of the coil spring. Since the roller support rod moves in the urging direction and disengages the roller from the roller receiving end only by moving in a circular shape, it sensitively reacts to the displacement at the transformation temperature of the coil spring and ensures the operation of the damper blade.

In the damper thermal fuse according to claim 6, the coil spring contracts at the transformation temperature, and the rotation-driving elongated plate, which is extended by screwing, is rotated along the elongated hole to unlock the fuse pin. It can be easily unlocked and driven by the force of the coil spring.

In the damper thermal fuse according to claim 7, since the outer edge open groove of the oblique cutout groove of the operating cylinder is closed by the closing rod, the return lock after unlocking can be easily performed only by pressing the fuse pin. It is possible to perform the returning operation easily, and the members can be easily stored and managed.

[Brief description of drawings]

FIG. 1 is a front view of a fire protection damper having a damper thermal fuse according to an embodiment of the present invention, and FIG.
FIG. 3 is a front view in which a part of the thermal damper for the first damper according to the embodiment of the present invention is cut away, and FIG. 4 is a view in the direction of line BB of FIG. 5 and 5 are partial explanatory views showing the operation of the lock release mechanism of the first temperature fuse for the damper, FIG. 6 is an explanatory view of another example of mounting the coil spring of the lock release mechanism, and FIG. FIG. 8 is a front view in which a part of a second damper thermal fuse according to another embodiment of the present invention is cut out, FIG. 8 is an enlarged perspective view showing a lock mechanism thereof, FIG. 9 is FIG. FIG. 10 is a cross-sectional view taken along line C, FIG. 10 is a front view in which a part of a third damper temperature fuse according to another embodiment of the present invention is cut out, FIG. 11 is a partial plan view thereof, and FIG.
FIG. 13 is an explanatory view of an unlocked state, FIG. 13 is a front view in which a part of a fourth damper temperature fuse according to another embodiment of the present invention is cut out, and FIG. 14 is a view taken along the line DD of FIG. Figure 15 shows
13 is a view taken along the line EE in FIG. 16, FIG. 16 is a front view in which a part of the thermal fuse for the fifth damper according to another embodiment of the present invention is partially cut, and FIG. FIG. 18 is a vertical sectional view of a sixth thermal fuse for damper according to another embodiment of the present invention, FIG. 19 is a sectional view taken along the line GG, and FIG. A line sectional view, FIG. 21 is an explanatory view of an unlocked state,
FIG. 22 is a partial front view of the cylinder body showing the lock pin and the key-shaped elongated hole, and FIG. 23 is a seventh view according to another embodiment of the present invention.
No. 24 front view of the thermal fuse for damper
FIG. 25 is a partially enlarged front view showing the lock mechanism and the lock release mechanism. FIG. 25 is a partially enlarged bottom view of the lock mechanism.
25 is a sectional view taken along the line II of FIG. 25, and FIG. 27 is a sectional view showing the unlocked state in FIG. 10 …… Temperature fuse for damper, 22 …… Fuse pin,
24 …… Projection part, 26 …… Cylinder body, 30 …… Cap, 32 ……
Biasing spring, 36 ... Lock mechanism, 38 ... Notch opening, 40 ...
… Shape memory alloy coil spring, 42 …… Lock release mechanism,
44 …… Roller groove, 46 …… Roller support rod, 48 …… Roller,
52 …… Operating cylinder, 54 …… Slanted notch, 58 …… Small diameter shaft, 60 ……
Opening and closing beak body, 62 …… Opening and closing plate, 66 …… Spring rod, 68 …… Beak body,
70: conical surface, 72: pressing plate, 74: supporting plate, 76a, 76
b, 76c ... pivotal connection, 78a, 78b ... first and second arm rods, 84 ...
Cam body, 86 …… Roller edge, 92 …… Frame body, 94 …… Stop plate, 96 …… Close plate, 98 …… Frame rod, 100 …… Projection, 102a, 1
02b ... first and second elongated holes, 104 ... coupling body, 106 ... receiving piece, 108 ... rotational drive long plate, 128 ... closed rod

Continuation of the front page (56) References JP-A-61-211582 (JP, A) Actual opening 61-133746 (JP, U) Actual opening 61-14054 (JP, U) Actual opening 61-118353 (JP , U)

Claims (7)

[Claims] 1. A thermal fuse having at least a projecting part (24) projecting partly in a flow path of a damper, wherein a cap (30) having a fuse pin hole (28) is provided. A cylinder body (26) including the projecting portion (24) fixed to one end, and a tube body (26) fitted and inserted into the tube body (26) and constantly biased toward the projecting portion (24) and operated. One end (22
a) is protruded from the fuse pin hole (28) of the cap (30) so that the working plate (20) of the damper blade rotating shaft (18)
The fuse pin (22) engaged with the cap pin (22) while resisting the spring biasing force of the fuse pin (22) toward the protruding portion (24). A lock mechanism (36) for holding the protruding portion (24) in a state of being projected from the damper channel, and the protruding portion (24) includes a notch opening portion (38) partially exposed to the damper flow path. The opening (38) is provided with a lock release mechanism (42) including a shape memory alloy coil spring (40), and the lock mechanism (36) has the other end (the other end of the fuse pin (22) on the damper flow path side. 22b) notch opening (38)
A roller groove (44) provided in the roller groove (44) and a roller (48) biased and supported so as to be constantly fitted in the roller groove (44), and the lock release mechanism (42) includes the fuse pin. (twenty two)
Is provided slidably along the longitudinal direction of the fuse pin (22) on the damper flow path side of the fuse pin, and is disengaged from the fitted state while guiding the fitted roller (48) along with the movement in the longitudinal direction. The shape memory alloy coil spring (40) is provided so as to penetrate the fuse pin (22), and The shape of the coil spring (40) made of a shape memory alloy is arranged close to the operating cylinder (52) so that the ambient temperature rises to the transformation temperature and the length of the operating cylinder (52) is changed to the length of the fuse pin (22). The temperature fuse for the damper, which slides in the direction to disengage the roller (48) from the roller groove (44), unlocks it, and pulls the actuating end of the fuse pin (22) by the biasing spring to actuate it. (Ten
a). 2. A thermal fuse having at least a projecting portion (24) projecting partly in a flow path of a damper, wherein a cap (30) having a fuse pin hole (28) is provided. A cylinder body (26) including the projecting portion (24) fixed to one end, and a tube body (26) fitted and inserted into the tube body (26) and constantly biased toward the projecting portion (24) and operated. One end (22
a) is protruded from the fuse pin hole (28) of the cap (30) so that the working plate (20) of the damper blade rotating shaft (18)
The fuse pin (22) engaged with the cap pin (22) while resisting the spring biasing force of the fuse pin (22) toward the protruding portion (24). A lock mechanism (36) for holding the protruding portion (24) in a state of being projected from the damper channel, and the protruding portion (24) includes a notch opening portion (38) partially exposed to the damper flow path. The opening (38) is provided with a lock release mechanism (42) including a shape memory alloy coil spring (40), and the lock mechanism (36) serves as a damper flow path side (22b) of the fuse pin (22). A small-diameter shaft (58) formed by expanding in a stepped manner at the end and a small-diameter shaft (58) are provided so as to elastically clamp the small-diameter shaft (58), and the small-diameter shaft (5
8) and a beak body (68) having a conical surface (70) formed so as to reduce its diameter toward the tip end direction, and the lock release mechanism (42) includes the fuse pin (22).
A pressing plate (72) slidably provided along the longitudinal direction of the pressing member and abutting on the conical surface (70) of the beak body (68) at an angle such that the beak body (68) is pushed open. The fuse pin (22) is inserted in the fuse pin (22), and when the temperature rises to the transformation temperature, the pressing plate (72) is pressed toward the tip end of the small diameter shaft (58), and the operating side end portion (22) of the fuse pin (22).
A thermal fuse (10) for a damper comprising the shape memory alloy coil spring (40) for unlocking a).
b). 3. A thermal fuse having at least a projecting part (24) projecting partly in a flow path of a damper, wherein a cap (30) having a fuse pin hole (28) is provided. A cylinder body (26) including the projecting portion (24) fixed to one end, and a tube body (26) fitted and inserted into the tube body (26) and constantly biased toward the projecting portion (24) and operated. One end (22
a) is protruded from the fuse pin hole (28) of the cap (30) so that the working plate (20) of the damper blade rotating shaft (18)
The fuse pin (22) engaged with the cap pin (22) while resisting the spring biasing force of the fuse pin (22) toward the protruding portion (24). A lock mechanism (36) for holding the protruding portion (24) in a state of being projected from the damper channel, and the protruding portion (24) includes a notch opening portion (38) partially exposed to the damper flow path. The opening (38) is provided with a lock release mechanism (42) including a shape memory alloy coil spring (40), and the lock mechanism (36) is a cutout of the protruding portion (24) from the cylinder body (26). Support plate (7) protruding from the opening (38)
4) and the end (22b) of the fuse pin (22) on the damper flow path side
And a first end in which the respective end portions are pivotally attached to the tip end side of the support plate (74), and the other end portions are pivotally attached to each other in the intermediate pivot attachment portion (76c). A second arm rod (78a, 78b), and the operating state end (22a) of the fuse pin (22) in a projecting state when the first and second arm rods (78a, 78b) are directly connected to each other. The lock release mechanism (42) locks the first and second arm rods (78
a, 78b) is rotatably pivotally mounted in the vicinity of the intermediate pivot portion (76c) in the linear connection state, and the first and second arm rods (78a, 78b) are linearly connected as they rotate. A cam body (84) that can be placed in the installed state, and that can press the intermediate pivotal portion (76c) to bend the arm rods (78a, 78b) from the intermediate pivotal portion (76c) into a mold shape. And one end of which is provided in the cylinder main body (26) while being linked to the cam body (84), the length is displaced at the transformation temperature to rotate the cam body (84) to operate the fuse pin (22). The shape memory alloy coil spring (4) that unlocks the side end (22a).
0) A thermal fuse for dampers (10c). 4. A thermal fuse having at least a projecting portion (24) projecting partly in a flow path of a damper, wherein a cap (30) having a fuse pin hole (28) is provided. A cylinder body (26) including the projecting portion (24) fixed to one end, and a tube body (26) fitted and inserted into the tube body (26) and constantly biased toward the projecting portion (24) and operated. One end (22
a) is protruded from the fuse pin hole (28) of the cap (30) so that the working plate (20) of the damper blade rotating shaft (18)
The fuse pin (22) engaged with the cap pin (22) while resisting the spring biasing force of the fuse pin (22) toward the protruding portion (24). A lock mechanism (36) for holding the protruding portion (24) in a state of being projected from the damper channel, and the protruding portion (24) includes a notch opening portion (38) partially exposed to the damper flow path. The opening (38) is provided with a lock release mechanism (42) including a shape memory alloy coil spring (40), and the lock mechanism (36) is a cutout of the protruding portion (24) from the cylinder body (26). A roller receiving edge (86) provided at the damper flow path side end (22b) of the fuse pin (22) projecting into the opening (38) and the fuse pin engaging with the roller receiving edge (86). A roller (48) for locking the fuse pin (22) so as to maintain the protruding state of the operation side end (22a) of (22); A roller support rod (46) pivotally supporting the roller (48), and the lock release mechanism (42) includes the roller support rod (46).
The roller (48) can be held in a state of being engaged with the roller receiving edge (86) of the roller (48) by being pivotally attached to a position near the end of the roller via a mounting tool (88), and the roller (48) can be supported by the roller receiving edge. (86)
A cam body (84) having an arcuate surface that can slide off from the cam body (84), and the cam body (84) is interposed between the cam body (84) and the cylinder body (26), and the length is displaced at the transformation temperature to move the cam body (84). A temperature fuse (10d) for a damper, comprising: a coil spring (40) made of a shape memory alloy, which is rotated to disengage the roller (48) from the roller receiving edge (86). 5. A thermal fuse having at least a projecting portion (24) projecting partly in a flow path of a damper, wherein a cap (30) having a fuse pin hole (28) is provided. A cylinder body (26) including the projecting portion (24) fixed to one end, and a tube body (26) fitted and inserted into the tube body (26) and constantly biased toward the projecting portion (24) and operated. One end (22
a) is protruded from the fuse pin hole (28) of the cap (30) so that the working plate (20) of the damper blade rotating shaft (18)
The fuse pin (22) engaged with the cap pin (22) while resisting the spring biasing force of the fuse pin (22) toward the protruding portion (24). A lock mechanism (36) for holding the protruding portion (24) in a state of being projected from the damper channel, and the protruding portion (24) includes a notch opening portion (38) partially exposed to the damper flow path. The opening (38) is provided with a lock release mechanism (42) including a shape memory alloy coil spring (40), and the lock mechanism (36) is a cutout of the protruding portion (24) from the cylinder body (26). The roller receiving end (90) provided at the damper flow path side end (22b) of the fuse pin (22) protruding from the opening (38) and the roller receiving end (90) are detachably arranged. , Locks and holds the projecting state of the operation side end portion (22a) of the fuse pin (22) while being engaged with the roller receiving end (90). Roller (4
8) and a roller support rod (46) attached to the end of the roller (48) so as to constantly urge the roller (48) in a direction to separate from the roller receiving end (90). , A stop provided continuously to the roller support rod (46) so as to maintain the engagement state of the roller (48) at the roller receiving end (90) against the biasing force of the roller support rod (46). Board (94)
The shape memory alloy coil spring (40) is inserted into the cutout opening (38) of the fuse pin (22), and the end portion of the shape memory alloy coil spring (40) is further provided. Is loosely fitted to the damper flow path side (22b) of the fuse pin (22) and slidable in the longitudinal direction of the fuse pin (22), and comes into contact with the stop plate (94) to secure the roller (48). It is attached to the roller receiving end (90) and moved in the longitudinal direction of the fuse pin (22) to release the contact state with the stop plate (94), and the roller (48) is attached to the roller receiving end (90). ) A thermal fuse (10e) for a damper, in which a top body (92) having a width that can be detached from the main body is fixed. 6. A thermal fuse having at least a projecting portion (24) projecting a part thereof in a flow path of a damper, wherein a cap (30) having a fuse pin hole (28) is provided. A cylinder body (26) including the projecting portion (24) fixed to one end, and a tube body (26) fitted and inserted into the tube body (26) and constantly biased toward the projecting portion (24) and operated. One end (22
a) is protruded from the fuse pin hole (28) of the cap (30) so that the working plate (20) of the damper blade rotating shaft (18)
The fuse pin (22) engaged with the cap pin (22) while resisting the spring biasing force of the fuse pin (22) toward the protruding portion (24). A lock mechanism (36) for holding the protruding portion (24) in a state of being projected from the damper channel, and the protruding portion (24) includes a notch opening portion (38) partially exposed to the damper flow path. The opening (38) is provided with a lock release mechanism (42) including a shape memory alloy coil spring (40), and the tube body (26) is closed at its end by a closing plate (96), and the tube body (26). ), A frame rod (98) is projectingly provided in the notch opening (38) of the projecting portion (24), and the lock mechanism (36) is provided with the fuse pin (22) in the tube body (26). A plurality of protrusions (100) are provided on at least the peripheral side surface and a first elongated hole (102a) is formed at the center position. The linking body (104) and the linking body projecting at an inner surface position close to the closing plate (96) fixed to the end of the tube body (26), against the spring bias of the fuse pin (22). A plurality of receiving pieces for locking the fuse pins (22) so as to receive the plurality of protrusions (100) of the (104) and maintain the protruding state of the fuse pins (22) from the cap (30). The lock release mechanism (42) is inserted into the second elongated hole (102b) opened in the closing plate (96), and the lock release mechanism (42) extends from the one end toward the link body (104). To the first elongated hole (102) of the linking body (104).
a rotary drive long plate (108) fitted in a) and the frame rod (9
8) and the rotation driving long plate (108), and the rotation driving long plate (108) is pulled out into the notch opening (38) at a predetermined temperature and along the second long hole (102b). The linked body (104) is rotated by a rotating rotary driving long plate to rotate the linked body (1).
A thermal fuse (10f) for a damper, comprising a coil spring (40) made of a shape memory alloy for disengaging the protrusion (04) from the receiving piece (106) of the cylinder body (26). 7. The operating cylinder (48) engaged with the roller (48) so that the roller (48) of the lock mechanism (36) and the operating cylinder (52) of the unlocking mechanism (42) are not separated. The damper thermal fuse (10) according to claim 1, wherein a closing rod (128) is fixed to the outer edge open groove of the oblique notch groove (54) of the 52).
g).