JPS62259025A - Tape-like heat sensitive sensor - Google Patents

Abstract

PURPOSE:To obtain a heat sensitive sensor which permits a consideration reduction of the cost of a fire detector by juxtaposing plural slender metallic foil tapes having heat conductivity to a base tape consisting of a heat shrinkable stock. CONSTITUTION:The plural slender sensor tapes 2 formed of the stock of the conductive foil, for example, aluminum foil, copper foil or stainless steel foil are stuck in parallel except prescribed spaces (g) onto the surface of the base tape 1 formed of the insulating stock which has a self-extinguishing characteristic and is heat-shrinkable at a specified ratio by a prescribed temp. elevation, for example, a polyvinylidene chloride into a film tape shape. A self-adhesive agent 3 such as both-sides self-adhesive tape or adhesive agent 4 for fixing such as prescribed adhesive agent is preliminarily coated over the entire rear surface of the base tape 1. The sensor tape 5 is stuck to the prescribed length within a fire monitoring area and is connected to a detecting part in the case of using the heat sensitive sensor tape 5. Since the base tape 1 and the sensor tape 2 are extremely low in cost, the cost of the fire detection is considerably reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention is a sensor for detecting general fire, comprising:
This relates to a type of tape-shaped heat-sensitive sensor that detects high heat associated with fire.

(Technical Background of the Invention) Fire detectors that detect general fires that occur in buildings, etc. include smoke detectors that detect smoke, heat detectors that detect heat, flickering flames, etc. There are types of devices that can detect this, but smoke detectors and heat detectors are generally used.

There are two types of smoke detectors: photoelectric type and ion type.

That is, a photoelectric sensor has a dark box part inside its main body that is shielded from light from the outside, and a point light source of constant brightness, such as a light emitting diode, and a photoelectric conversion element are arranged in the dark box part. When smoke generated by a fire enters the dark box, the light from the point light source becomes scattered light due to the particles of the smoke, and the entire inside of the dark box becomes bright. When this brightness reaches a predetermined value, an electromotive voltage is generated at the output end of the photoelectric conversion element, and this is amplified to drive an alarm or the like.

In addition, the ion type sensor has an americium element (atomic number 95) and an ionizing electrode arranged inside the sensor body, and the air between the electrodes to which a constant voltage is constantly applied is exposed to alpha rays emitted from the americium. to form a predetermined amount of ions. When smoke enters the sensor body under this condition, the above ions are reduced by the smoke particles, which are carbon elements, resulting in a change in the bridge opening current value, which can be used to drive alarms, etc. .

However, the smoke particles generated in general fires vary depending on the type and temperature of the burning material, so for example, new building materials and petroleum chemicals such as polyurethane, which burn at high temperatures, have small and large smoke particles. The ion type is more sensitive because it generates smoke, whereas the photoelectric type is more suitable when the smoke particles are relatively large and the smoke concentration is low, such as when cigarettes or general wood are burned. ing.

On the other hand, when the air in the closed pressure-sensitive V-ram installed inside the heat sensor expands due to the heat of the fire, the heat sensor measures the expansion rate and the air flow through the through holes drilled in the drum. A differential type that operates when the coefficient of expansion is high by taking advantage of the difference in thermal expansion coefficient, and a bimetal to which multiple metals with different coefficients of thermal expansion are attached are used to bend a predetermined amount at a preset temperature. There is a constant temperature type that closes the contact. This heat detector does not operate unless the temperature at the site of the fire reaches a high temperature, so it cannot be detected in the early stages of smoldering.

In addition, there are other methods that detect the flickering of a fire using a photoelectric conversion element, and others that use an infrared sensor to detect heat rays from a fire source. Difficult to identify with equipment.

In this way, the fire detectors currently in use have advantages and disadvantages when considered individually, and it is difficult to achieve sufficient effectiveness when used alone. Therefore, in places where the installation of fire detectors is mandatory, smoke detectors Both are equipped with heat detectors. In addition, for a wide area monitoring area, a distributed differential type is used in which a heat-sensitive hollow steel thin tube is stretched on the ceiling and the end thereof is connected to the pressure-sensitive chamber of the differential type heat sensor.

(Problems with the background technology) Although each of the above fire detectors is effective against individual fires, it is difficult to detect complex combustion conditions such as general fires. This is the reality.

Additionally, as is well known, if the sensitivity is set too high, problems may occur due to malfunction, and it may be difficult to set the activation timing after a fire occurs.
In fact, some users even turn off the power switch of their fire alarm system.

All the sensors on the ship, except for the distributed differential type, are spot sensors, so the wider the monitoring area, the more they must be scattered, and the installation work requires a lot of work to install different types of sensors. It took a lot of time and effort, and the maintenance was also a big burden.

Even in the case of the distributed differential type, this requires a great deal of effort, such as laying heat-sensitive pipes on the ceiling and connecting them to the sensitive chambers at regular intervals.

In general, fire alarm systems are expensive in proportion to their effectiveness, as the detectors themselves are expensive, many of them must be used, their construction costs are enormous, and maintenance costs are also a huge burden. This has become a major obstacle to its widespread use.

(Purpose of the Invention) The present invention was developed in view of the performance, workability, and cost problems of conventional fire detectors such as diagonal fire detectors. It is extremely easy to install and can be completed by simply pasting a predetermined length in any location, and is much cheaper than conventional sensors due to its simple configuration. The object of the present invention is to provide a tape-shaped heat-sensitive sensor that can be used in various ways.

That is, in order to achieve the purpose of tilting, the tape-shaped heat-sensitive sensor according to the present invention includes a plurality of narrow metal foil tapes having a predetermined thermal conductivity on a base tape formed into a tape shape from a heat-shrinkable material. The metal foil tapes are arranged in parallel with a certain distance left between them, and are stretched anywhere in the monitoring area, such as on the ceiling, floor, or wall, so that in the event of a fire, the metal foil tapes will come into contact with each other due to the heat shrinkage of the base tape. Since a short circuit occurs, this is used as a fire detection signal to drive a desired alarm or the like.

(Embodiments of the Invention) Examples of the present invention will be described below with reference to FIG. 1 and the following figures.

First, the basic structure of the present invention, as shown in FIG.
On the surface of the base tape 10, which is formed into a film tape shape with a shrinkage rate of 50% at around 100°C, a plurality of thin strips made of a material such as conductive metal foil, for example aluminum foil, copper foil, or stainless steel foil, are formed. The width sensor tapes 2 are pasted in parallel with a predetermined interval <i> left.

As for this pasting means, the sensor tape 2 is adhered to the adhesive tape 1 using a well-known adhesive 3 capable of adhering the above-mentioned adhesive. , W, > W, and both sensor tapes 2 are in a free state without adhesion in the gap <i).

Furthermore, on the back side of the base tape 1, a fixing adhesive 4 such as a double-sided adhesive tape or a predetermined adhesive is applied to the entire surface in advance. It is necessary to select the adhesive force or adhesion force of the adhesive to be smaller.

Of course, in order to more easily satisfy such conditions, the fixing adhesive 4 may be dotted on the back surface of the base tape 1 at predetermined intervals (P) as shown in FIG. 2, or as shown in FIG. As shown in the figure, a plurality of fixing adhesives 4 may be applied in parallel lines at regular intervals (P) on the back surface of the base tape 1 so as not to interfere with the shrinkage of the base tape 1.

When using the heat-sensitive sensor 5 having the above configuration, it is stretched for a predetermined length within the fire monitoring area.

That is, as shown in FIGS. 4 and 5, the 4% adhesive is applied to a predetermined position on the ceiling 6 and wall 70 in the building, and the sensor tape 2 is directed indoors. . When electrically connecting the thermal sensors 5, the sensor tapes 2A and 2B of the left thermal sensor 5A and the right thermal sensor 5B are connected to separate metal foil tapes 8 as shown in FIG. This makes a short-circuit connection, but the connection between the two is bonded with a conductive adhesive.Furthermore, the terminal end of the thermal sensor 5 can be connected to the detection part 9 by any means such as the above method or soldering of a lead wire. be.

As shown in FIG. 7, the basic configuration of the detection unit 9 is that one sensor tape 2' of the heat-sensitive sensor 5 is grounded, and the other sensor tape 21 is connected to a predetermined DC voltage vee.
is applied, and the excitation circuit 12 of the relay is connected in series via the latch circuit 10 and the NOT circuit 11.
An alarm system 14 is connected to the contact 13 side, and when the output side voltage of the NOT circuit 11 reaches the "0" level due to a short circuit or disconnection of both sensor tapes 2' and 2' as described later, an excitation current flows. The a contact 13 is intended to close and activate the alarm system 14.

The operation of the diagonally upper thermal sensor 5 is as follows.

When a fire occurs, the R-stape 1 undergoes thermal contraction due to radiant heat from the flame, and accordingly, the interval <y> between the two sensor tapes 2 gradually decreases, eventually resulting in a short circuit. As a result, as described above, the detection unit 9 is activated and the alarm system 14 is activated to issue a warning that a fire has occurred. Note that this heat shrinkage characteristic is determined by the material of the base tape 1, so the material selection and the distance between the sensor tape 2 <i
＞The above-mentioned temperature-sensing characteristics at the time of fire outbreak can be freely set.

Next, in the second embodiment shown in FIG.
The pair of sensor tapes 2 are placed on the upper surface of the
i), and a heat-shrinkable cover tape 15 of the same quality as the first stave 1 is pasted thereon, and the sensor tape 2 has a base tape 1 and a cover tape 15 on both the left and right sides, respectively. A protruding piece 16 protruding outward by a predetermined amount
A sealed space 17 is formed on the inside of the left and right sensor tapes 2.

Further, when adhering each tape, the adhesive 3 is not applied to the vicinity of the closed space 17 from the end face, and the inner sides of the left and right sensor tapes 2 are left free.

In use, the R-stape 1 may be attached to the ceiling or wall as in the previous embodiment, but in the case of this embodiment, the protruding piece 16 of the sensor tape 2 is processed as shown in FIG. An electrical connection is made by adhering a separate desired metal foil tape 8 such as a copper foil with a conductive adhesive, or by soldering a piercing pin or a lead wire (not shown).

According to the above embodiment, while the sensor tape 2 is normally protected by the cover tape 15, in the event of a fire, both the base tape 1 and the cover tape 15 are thermally shrunk to obtain a larger shrinkage force, and the sensor tape 2 is protected by the cover tape 15. The increase in the heat-receiving area of sensor tapes 2 increases thermal conductivity and thermal deformation force, and together with the thermal expansion of the air in the sealed space 17, the proximity and contact between both sensor tapes 2 becomes more reliable. As a result, the heat detection sensitivity improves by 9 points.

As shown in FIG. 10, by making the width of the base tape 1' wider than the widths of the cover tape 15 and the sensor tape 2, one staple 1' can be attached to an outer member 18 such as a nail or stapler. It can also be fixed to the ceiling or wall.

In addition, by forming notches 19 at regular intervals at the protruding pieces 16 of the sensor tape 2, it is possible to easily wind the entire long thermal sensor 5 (see Fig. 11), and to The piece 16 may be wrapped up to the back side of the base tape 1 to improve the heat receiving efficiency.Furthermore, by forming the above-mentioned notch 19 at this time, a part of the piece 16 protrudes and is used to make the heat sensitive. It is also possible to connect sensor 5 (first
(See Figure 2).

Of course, as shown in FIG. 13, one of the protruding pieces 16 should be wrapped around the top surface of the cover tape 15 and the other protruding piece 16 should be wrapped around the back side of the staple tape 1, and these protruding pieces 16 should be wrapped in accordance with the membership fee.
may be adhered to the base tape 1 and the cover tape 15 to further increase the heat absorption efficiency.

In such an embodiment, when connecting the heat-sensitive sensor 5, a metal foil piece 8 is attached with a conductive adhesive onto the protruding piece 16 of the sensor tape 2 wound on the upper surface of the cover tape 15.
It can be easily connected by gluing (see Fig. 14).

Next, the embodiment shown in FIG. 15, like the previous embodiment,
A pair of sensor tapes 2 are arranged in parallel lines on a base tape 1 [... and sandwiched and laminated by a cover tape 15 and a base tape 1, so that the upper surface of the cover tape 15 Then, a separate heat-resistant metal foil tape 20Y such as stainless steel foil or copper foil is laminated and bonded with adhesive 3.

This means that when it is attached to the wall surface 7 and heated by flame from below as shown in FIG. There is a risk that the heat-resistant metal foil tape 20 may shrink and make it difficult for both sensor tapes 2 to come into close contact with each other smoothly.
As the flame heat spreads, the heat of the flame is conducted and diffused to equalize the heat distribution, so that the cover tape 15 and the base tape 1 are thermally contracted without being unevenly distributed, and both sensor tapes 2 are brought into even contact with each other. be able to. Of course, the flame is #! Even in the case of a hit as shown in Fig. 4, the above effect remains the same, and the sensitivity becomes even higher.

Alternatively, the protruding piece 16 of the sensor tape 2 can be used to connect the sensor tape 2 in the same manner as in the above embodiment, or the protruding piece 16 can be connected to the R-stape 1.
It is also possible to further increase the sensitivity by wrapping it around the bottom side.

Furthermore, in the embodiment shown in FIG. 16, in the above embodiment, a heat-resistant metal foil tape 21 is also bonded to the lower surface side of the K-stave 1 with an adhesive 3. - It is possible to promote uniformity of heat distribution on the tape 15, further improve the heat shrinkage function, and prevent local burnout of the base tape 1 and cover tape 15 due to flames.

In each of the above-mentioned embodiments, the laminated tapes are glued together, but the width of the adhesive applied is such that the inner end of the sensor tape 2 is not fixed and is free, as described above. Regarding the material of each tape, the heat deformation temperature of R-stave 1 and cover tape 15 is higher than that of heat-resistant metal foil 2L,
The heat shrinkage force of the base tape 1 and the cover tape 15 is required to be smaller than that of the heat-resistant metal foil tapes 20 and 21, and larger than that of the heat-resistant metal foil tapes 20 and 21.

In the embodiments described above, the finished products are manufactured in advance in a factory, etc., but in other embodiments, the tape 1, the cover tape 15, the sensor tape 2, and the heat-resistant metal foil tapes 20 and 21 are manufactured separately. Some products are delivered to the construction site, laminated with the required amount of each tape, etc. and then glued together and affixed to the construction site.

In this case, the projecting piece 16 is not formed on the sensor tape 2 in advance, but a small piece 22 made of the same material is inserted and held in the sensor tape 2 as shown in FIG. 17, and this is also bonded with a conductive adhesive. Then, using the small piece 22, it is connected to other heat-sensitive sensors 5, an alarm system, etc. as described above.

Further, the number of sensor tapes 2 is not limited to 2 & (1 pair), and the number may be greater than that.

Furthermore, each of the heat-sensitive sensors 5 is not limited to being attached to buildings; for example, it can be attached to carpets such as carpets and tatami mats, fusuma, curtains, etc., or to blankets.
It is also possible to sew or insert it into bedding such as futons.

(Effects of the Invention) As explained above, according to the present invention, a plurality of sensor tapes formed into a tape shape with conductive foil are attached to a heat-shrinkable film tape in parallel lines leaving a predetermined interval. Since they are installed side by side, they have many features such as the following.

(11) In normal times, there is no physical or chemical influence from the surroundings on the sensor tape, but in the event of a fire, the heat may cause the tape, etc. to shrink due to heat, causing a short circuit between multiple sensor tapes. Since it can detect fire, there are extremely few malfunctions and high reliability.

(2) Since it is possible to set the installation state arbitrarily such as scattered, linear, area, or three-dimensional, spot monitoring of specific locations is not required, but it can be used indoors of general buildings or long corridors. It can be installed freely in places with vertical space such as stairs and lobbies, large spaces such as gymnasiums and theaters, and even bedding such as tatami mats, car mats, beds, etc. ,
It can be easily incorporated into fittings and interior goods such as curtains and sliding doors, and is completely different from conventional fire detectors.

(31) Since the main components are heat-shrinkable tape and metal foil tape, manufacturing costs are extremely low.In addition, construction costs are low and maintenance is low because the only thing to do is pasting it on the target area. Since it requires almost no cost, it can be provided and used at a much lower cost than conventional fire detectors, and can be easily used in general households, etc., making it a great choice as a fire detection sensor. Versatility can be greatly increased.

(4) The state of the finished product is not fixed, but it is possible to carry materials such as heat shrink tape and sensor tape to the construction site in a semi-finished state and combine them as appropriate depending on the construction target to make the finished product. It is possible and construction is extremely easy.

Of course, even the finished product itself is a thin and narrow tape,
In addition, since it is flexible, it can be easily wound onto a ram or reel, which is convenient for workability, warehouse management, and transportation.

(5) When connecting heat-sensitive sensors to each other, to the detection part, to the relay multiplication part, etc., it is possible to use conventional means such as attaching IJ ha wires, but it is also possible to use metal foil pieces glued together with conductive adhesive. It is extremely easy to install, as it can be completed by simply connecting with a piercing contact, etc.

(6) As mentioned above, since the heat-sensitive sensor is in the form of a film tape, it can of course be installed in any location such as the ceiling, floor, or wall, but even after installation is completed, it remains flat with no protruding parts. It does not affect the appearance or normal use, and by giving the heat-resistant metal foil tape a beautiful finish, it can also be used for interior design.

(7) Unlike conventional sensors, it is not affected by cigarette smoke, dust, external pressure, impact, or heat from fire sources normally used indoors, such as stoves, Nutops, water heaters, etc.

[Brief explanation of drawings]

The figures relate to an embodiment of the tape-shaped thermal sensor of the present invention. Fig. 1 is a partial perspective view showing the basic structure of the sensor, and Figs. 2 and 3 show the adhesive on the back side of the thermal sensor. A partial bottom view showing an example of arrangement, Fig. 4 is an explanatory drawing showing an example of installation on a ceiling, Fig. 5 is an explanatory drawing of an example of installation on a wall, and Fig. 6 is a part showing an example of connection between thermal sensors. The perspective view, Figure 7 is the circuit diagram of the detection section, and Figure 8! FIG. 9 is a partial perspective view of a thermal sensor according to the second embodiment of SL; FIG. 9 is a partial perspective view when the sensor is connected; FIG. 10 is a partial perspective view showing an example of fixing to a construction surface using a base tape; FIG. 11 is a partial perspective view showing an embodiment in which a notch is formed in the sensor tape to facilitate winding, FIG. 12 is a partial perspective view showing an embodiment in which the thermal efficiency of the sensor tape is further improved.
Figure 13 is a partial perspective view showing the other side of the sensor tape, which also improves thermal efficiency, Figure 14 is a partial perspective view of an example in which these are connected, and Figure 15 is a heat-resistant metal tape attached to improve heat distribution. FIG. 16 is a partial perspective view of an embodiment that is further improved from the above embodiment, and FIG.
The figure is a partial perspective view illustrating the case where the heat-sensitive sensor according to the present invention is made into a completed product at a construction site. 1 ... Base tape 2 Sensor tape 3 ... Adhesive 5 ... Heat-sensitive sensor 8 ... Metal foil piece 9 ... Detection section 15 ... Cover tape 16 ... Projection piece 17 ... Sealed space 19・・Notch 20.21 ・・Heat-resistant metal foil tape Figure 2, Figure 3, Figure 4, Figure 11, Figure 10

Claims (7)

[Claims] (1) A tape-like shape made by pasting multiple sensor tapes formed into thin film tapes from conductive metal foil in parallel lines with a predetermined interval left on a heat-shrinkable base tape. heat sensitive sensor. (2) A plurality of sensor tapes formed into thin film tapes made of conductive metal foil are adhered to a heat-shrinkable base tape in parallel lines with a predetermined interval left, and the sensors A tape-shaped thermal sensor made by laminating and pasting a heat-shrinkable cover tape on the top surface of the tape. (3) A plurality of sensor tapes made of conductive metal foil formed into a narrow film tape are adhered to a heat-shrinkable base tape in parallel lines with a predetermined interval left, and the sensor A tape-shaped heat-sensitive sensor comprising a heat-shrinkable cover tape laminated and adhered to the upper surface of the tape, and a heat-resistant metal foil tape laminated and adhered to the outer surface of the cover tape and/or base tape. (4) The tape-shaped thermal sensor as set forth in claims 2 and 3, wherein the sensor tape is adhered to form a protruding piece while protruding outward by a predetermined length from the base tape. (5) The tape-shaped heat-sensitive sensor according to claim 4, wherein the protruding piece of the sensor tape is wound around the outside of the cover tape and/or the base tape. (6) The tape-shaped heat-sensitive sensor according to claims 2 to 6, wherein a notch is formed in the protruding piece of the sensor tape. (7) The tape-shaped heat-sensitive sensor according to claims 2 to 6, characterized in that a small piece of conductive metal foil is interposed in the sensor tape.