JP3757372B2 - Thermal fuse device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
This invention is a double tube comprising an outer tube shown in FIG. 3 and an inner tube that is inserted into the outer tube and forms an outer air passage between the outer tube and itself forms an inner air passage, Fire prevention dampers provided respectively in the ventilation path of a two-pipe duct such as a two-hole pipe that forms two ventilation paths by providing a partition plate in the pipe axis direction inside the pipe shown in FIG. The present invention relates to a thermal fuse device for closing a ventilation passage when the ventilation of the ventilation passage becomes higher than a preset temperature in the ventilation passage.
[0002]
[Prior art]
Japanese Patent Application Laid-Open No. 2000-14819 discloses a fire damper device that independently and simultaneously automatically shuts the internal and external air passages of the internal and external double pipes.
[0003]
[Problems to be solved by the invention]
However, in the conventional fireproof damper device described above, since the heat-sensitive part by the fuse is installed only in one ventilation path, the ventilation temperature of the other ventilation path is higher than the temperature previously set in the ventilation path. However, the damper does not work immediately.
[0004]
An object of the present invention is to provide a thermal fuse device for immediately closing the fire-proof dampers of both ventilation paths when the ventilation of either one of the ventilation paths exceeds a preset temperature in the ventilation path. And
[0005]
[Means for Solving the Problems]
In order to solve the above-described problems, the thermal fuse device of the present invention is provided with a fire damper provided in each of the ventilation paths of the two duct ducts, and the ventilation of either one of the ventilation paths is a temperature set in advance in the ventilation path. A thermal fuse device for simultaneously operating when the above is provided, comprising an upper lid fixed to the upper end of the cylinder and provided with a through hole, and a locking member for closing the lower end of the cylinder, and a second duct duct A cylindrical case provided with a notch opened in the cylindrical wall toward the ventilation path, a cap-shaped pressing portion fitted into the case, and an upper end of the pressing portion fixed to the upper surface of the pressing portion A fuse presser composed of a stopper pin loosely fitted in the through hole, and a pipe-like first heat sensitive part and second heat sensitive part provided with a flange are located in the first and second air passages of the two-pipe duct, respectively. Like each A fuse shaft welded to the outer periphery with a low melting point alloy that melts at the set temperature of the heat sensitive part, and is mounted between the upper lid of the case and the upper surface of the pressing part of the fuse retainer. And a compression coil spring that urges the flange of the first heat sensitive part of the fuse shaft via the pressing part of the fuse presser when the flange of the part is fixed to the lower end of the case.
[0006]
In the thermal fuse device of the present invention, since the heat sensitive part is provided in each ventilation path, the ventilation temperature for closing the damper suitable for the ventilation path can be set in each ventilation path. Moreover, when the ventilation of any one of the ventilation paths becomes equal to or higher than the temperature set in advance in the ventilation path, the fireproof dampers of both ventilation paths can be immediately activated. In addition, since the blockage of the dampers in both ventilation paths can be controlled with a single thermal fuse device, the simultaneous operation mechanism of the dampers in both ventilation paths becomes simple and reliable, and the ventilation resistance of the ventilation paths is minimized. be able to.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described in detail with reference to the drawings. 1A is a longitudinal sectional view of the thermal fuse device of the present invention, and FIG. 1B is a sectional view taken along a plane orthogonal to the section of FIG. 1A.
[0008]
The case 2 of the thermal fuse device 1 has a cylindrical shape, and an upper lid 3 is fixed to the upper end of the cylinder, a through hole 4 is formed in the upper lid 3, and notches 5 are provided on both sides of the lower end of the tube. A U-shaped clip 6 that closes the lower end of the pipe is inserted into the notch 5 as a locking tool. And the notch 7 opened toward the 1st ventilation path 9 in the inner pipe 22 of a double pipe is provided. In addition, a mounting portion 8 for fixing the thermal fuse device 1 to the inner tube 22 is provided on the upper portion of the case 2.
[0009]
A fuse presser 10 including a cap-shaped pressing portion 11 and a stopper pin 12 fixed to the upper surface of the pressing portion 11 is fitted and inserted into the upper portion of the case 1. The distal end portion of the stopper pin 12 is loosely fitted in the through hole 4 of the upper lid 3 and protrudes from the upper lid 3.
[0010]
A fuse shaft 14 is disposed below the inside of the case 2. On the outer periphery of the fuse shaft 14, pipe-shaped first and second heat-sensitive parts 15 and 16 having flanges are provided. Welded with a low melting point alloy 19 that melts at the set temperature of the portions 15 and 16. In addition, the 1st heat sensitive part 15 is in the 1st ventilation path 9 in the inner tube 22 of a double tube, and the 2nd heat sensitive part 16 is in the 2nd ventilation path 17 between the outer tube and the inner tube 22 of a double tube. It arrange | positions so that it may be located.
[0011]
A compression coil spring 18 is mounted around the stopper pin 12 between the upper lid 3 of the case 2 and the upper surface of the pressing portion 11 of the fuse presser 10. When the flange of the second heat sensitive part 16 of the fuse shaft 14 is fixed to the lower end of the case 2 by the U-shaped clip 6 inserted into the notch 5 at the lower end of the case 2, the biasing force of the compression coil spring 18 causes The pressing part 11 of the fuse presser 10 presses the flange of the first heat sensitive part 15 downward. At this time, the tip end portion of the stopper pin 12 protrudes from the upper lid 3 to prevent movement of the lever 20 that operates a fireproof damper (not shown).
[0012]
FIG. 2A is a cross-sectional view of the thermal fuse device 1 showing a state where the ventilation temperature of the first ventilation path 9 is equal to or higher than the set temperature and the low melting point alloy 19 of the first heat sensitive part 15 is melted, and FIG. FIG. 3 is a cross-sectional view of the thermal fuse device 1 showing a state where the ventilation temperature of the second ventilation path 17 is equal to or higher than a set temperature and the low melting point alloy 19 of the second heat sensitive part 16 is melted.
[0013]
In any case, when the ventilation of any one of the ventilation paths reaches or exceeds the temperature set in advance in the ventilation path, the low melting point alloy of the ventilation path is melted, and the heat sensitive part of the ventilation path, the fuse shaft 14, Is released, the tip of the stopper pin 12 is buried in the case 2 by the urging force of the compression coil spring 18, allowing the lever 20 to move, and the fire damper is activated to simultaneously shut off both ventilation paths. .
[0014]
FIG. 3 shows a double pipe 23 comprising an outer pipe 21 and an inner pipe 22 which is inserted into the outer pipe 21 and forms the outer ventilation path 17 between the outer pipe 21 and itself forms the inner ventilation path 9. It is sectional drawing which shows the state which attached the thermal fuse apparatus 1 of this invention to the comprised 2 duct duct.
[0015]
FIG. 4 shows a state in which the thermal fuse device 1 of the present invention is attached to a two-pipe duct composed of a two-hole pipe 27 that forms two ventilation paths 25 and 26 by providing a partition plate 24 in the pipe axis direction inside the pipe. It is sectional drawing shown.
[0016]
In any two duct ducts, both the heat sensitive parts 15 and 16 of the thermal fuse device 1 are located in both ventilation paths, and the movement of a lever of a fireproof damper (not shown) protrudes from the cover plate 3 of the case 2. It is blocked by the tip of the stopper pin 12.
[0017]
FIG. 5 is a cross-sectional view of a double pipe vent cap 30 with a fire-proof damper for explaining an example in which the thermal fuse device 1 of the present invention is installed. The first damper plate 31 and the second damper plate 32 are opened. Indicates the state.
[0018]
Next, the structure of the fireproof damper will be described. When the first damper plate 31 rotates in the direction of the arrow 35 by the action of a torsion coil spring (not shown) provided on the rotary shaft 33 with the rotary shaft 33 as an axis, the first ventilation path 9 in the inner pipe 22 of the double pipe 23 is used. Closed. The second ventilation path 17 between the outer tube 21 and the inner tube 22 has a second damper plate 32 having a circular cutout in the direction of the arrow 36 along the outer periphery of the inner tube 22 around the shaft 34. When rotated, it is closed at the end of the outer tube 21.
[0019]
And since the 1st link 37 fixed to the upper end of the rotating shaft 33 of the 1st damper board 31 is engaged with the upper end of the stopper pin 12 of the thermal fuse apparatus 1 by the lever 20, attachment of the said torsion coil spring is carried out. Rotation due to power is restricted. The first link 37 is connected to the second damper plate 32 by the second link 38.
[0020]
Therefore, when the temperature of the ventilation of the first ventilation path 9 or the second ventilation path 17 becomes equal to or higher than the set temperature and the upper end of the stopper pin 12 of the thermal fuse device 1 is buried in the upper lid 3, the restriction by the lever 20 is released. The first link 37 and the rotating shaft 33 are rotated by the urging force of the torsion coil spring to close the first ventilation path 9 with the first damper plate 31 and are simultaneously connected to the first link 37. The second damper plate 32 is also rotated by the movement of 38 to close the second ventilation path 17.
[0021]
In the above-described embodiment, the case where the thermal fuse device is attached to the two-pipe duct composed of the outer tube and the inner tube is shown fixed to the inner tube, but may be fixed to the outer tube. A first ventilation path is formed between the inner pipe and the inner pipe, and a second ventilation path is formed within the inner pipe.
[0022]
In the two-pipe duct of the present invention, in addition to the case where one ventilation path is used for exhaust and the other is used for intake, one is used for exhaust for a fire use room such as a kitchen, and the other is used for a bathroom or a toilet. It is also used for exhausting general rooms. In the latter case, the set temperature of the heat sensitive part for operating the fire damper is, for example, 120 ° for the fire chamber and 90 ° for the general chamber.
[0023]
Moreover, although the example which uses the U-shaped clip 6 as a locking tool which obstruct | occludes the cylinder lower end of case 2 was shown, although there is a clearance gap between the pipe part of the 2nd heat sensitive part 16 at a cylinder lower end, it can support a flange part A cap provided with a through hole of any diameter may be screwed as a locking tool.
[0024]
In the above-described embodiment of the present invention, the case where the case of the thermal fuse device is cylindrical has been described. However, the present invention can be implemented even in the case of a rectangular tube.
[0025]
【The invention's effect】
Since the thermal fuse device of the present invention is configured as described above, the following effects can be obtained. A heat-sensitive part is provided in each ventilation path, and the ventilation temperature at which the damper is blocked can be set for each ventilation path, so that unnecessary damper blockage is prevented, and the damper is quickly installed at an appropriate ventilation temperature. It becomes possible to occlude.
[0026]
In addition, when the ventilation of one of the ventilation paths exceeds the temperature set in advance, the fire dampers of both ventilation paths can be activated immediately, preventing the fire from spreading and spreading at an early stage. be able to.
[0027]
Furthermore, since the blockage of the dampers of the two ventilation paths can be controlled by a single thermal fuse device, the simultaneous operation mechanism of each damper can be simplified and ensured, and the ventilation resistance of the ventilation paths can be minimized. In addition, since the thermal fuse device can be disassembled and assembled by attaching and detaching the locking tool, maintenance and inspection are facilitated.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a thermal fuse device of the present invention.
FIG. 2 is a cross-sectional view of a thermal fuse device showing a state where a low melting point alloy is melted.
FIG. 3 is a cross-sectional view showing a state in which the thermal fuse device of the present invention is attached to a two-pipe duct composed of a double pipe.
FIG. 4 is a cross-sectional view showing a state where the thermal fuse device of the present invention is attached to a two-pipe duct composed of a two-hole pipe.
FIG. 5 is a cross-sectional view of a double tube vent cap with a fireproof damper for explaining an example in which the thermal fuse device of the present invention is installed.
[Explanation of symbols]
1 is a thermal fuse device, 2 is a case, 3 is an upper lid, 4 is a through hole, 5 is a notch, 6 is a U-shaped clip, 7 is a notch, 8 is a mounting portion, 9 is a first ventilation path, and 10 is a fuse retainer , 11 is a pressing part, 12 is a stopper pin, 14 is a fuse shaft, 15 is a first heat sensitive part, 16 is a second heat sensitive part, 17 is a second ventilation path, 18 is a compression coil spring, 19 is a low melting point alloy, 20 Is a lever, 21 is an outer pipe, 22 is an inner pipe, 23 is a double pipe, 24 is a partition plate, 25 is a ventilation path, 26 is a ventilation path, 27 is a two-hole pipe, 30 is a double pipe duct vent cap, Reference numeral 31 denotes a first damper plate, 32 denotes a second damper plate, 33 denotes a rotation shaft, 34 denotes a shaft, 35 denotes an arrow, 36 denotes an arrow, 37 denotes a first link, and 38 denotes a second link.

Claims (1)

It is a thermal fuse device for operating fireproof dampers provided in the ventilation ducts of the two duct ducts at the same time when the ventilation of either ventilation duct exceeds the preset temperature in the ventilation duct. And
(A) An upper lid fixed to the upper end of the cylinder and provided with a through hole, and a locking member for closing the lower end of the cylinder, and a notch opened toward the first ventilation path of the two-line duct is formed on the cylinder wall A cylindrical case,
(B) a fuse presser comprising a cap-shaped pressing portion inserted into the case, and a stopper pin fixed to the upper surface of the pressing portion and having a tip portion loosely fitted in the through hole of the upper lid;
(C) The pipe-shaped first and second heat-sensitive parts provided with flanges are set at the set temperatures of the respective heat-sensitive parts such that the pipe-like first and second heat-sensitive parts are located in the first and second ventilation paths of the two duct ducts, respectively. A fuse shaft welded to the outer periphery with a melting low melting alloy,
(D) When the flange of the second heat sensitive part of the fuse shaft is fixed to the lower end of the case by being attached between the upper lid of the case and the upper surface of the pressing part of the fuse presser, A compression coil spring that urges the flange of the first heat sensitive part of the fuse shaft through the pressing part of the fuse presser;
And a thermal fuse device.

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