JP2003063484A - Automatic buoyancy bag inflating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic buoyancy bag inflating device requiring no complicated replacement of a battery, and having a water landing detecting means capable of detecting water landing not only in the seawater but also in the fresh water. SOLUTION: This automatic buoyancy bag inflating device has a pedestal 118 attached with a stroke needle 119 for breaking through a blocking-up plate 113 for sealing a compressed fluid cylinder 111, a fluid passage 121 for introducing compressed fluid into a buoyancy bag, a pedestal chamber communicating with the fluid passage 121, and freely housing the pedestal 118 in close contact in a side wall, a gunpowder cartridge chamber 152 communicating with the pedestal chamber, and capable of installing a gunpowder cartridge 135, and the water landing detecting means electrically connected to the gunpowder cartridge. The water landing detecting means has a water landing discriminating circuit for detecting an electric current flowing between detecting electrodes when liquid exists between a pair of detecting electrodes, and an ignition means for operating by receiving an ignition signal from the water landing discriminating circuit.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating bag automatic inflating device, and more particularly, to a floating bag provided with an inspection mechanism for easily inspecting the presence of disconnection of an ignition device in the automatic floating bag inflating device. Automatic inflation device. 2. Description of the Related Art In the event of a marine accident, a floating bag automatic inflation device using a seawater battery is known as a floating bag automatic inflation device for automatically inflating the floating bag upon detection of water landing. However, the seawater battery used in the conventional compressed fluid introduction device has a short life of about one year,
It was necessary to replace the seawater battery every year without using the automatic bladder inflator. Therefore, replacement of the seawater battery is troublesome, and replacement cost is high, which is uneconomical. Furthermore, seawater batteries are used as battery electrolytes, taking advantage of the high electrical conductivity of seawater, to detect landing and ignite explosives. Water detection and explosive ignition may not be performed reliably. Therefore, there has been a problem that the conventional automatic bladder inflatable device cannot be used for a flood accident in a freshwater system such as a pond or a river. SUMMARY OF THE INVENTION It is an object of the present invention to provide a floating bag automatic inflation device provided with a means for detecting water contact which does not require complicated replacement of batteries. It is another object of the present invention to provide an automatic inflatable bladder equipped with a water landing detecting means capable of detecting water landing not only in seawater but also in fresh water. Means for solving the above problems are as follows: a main body, a compressed fluid cylinder mounted on the main body, and sealed by a sealing plate to seal a compressed fluid, A fluid passage for introducing a fluid into the floating bag, a firing pin provided in the main body so that the sealing plate can be manually pierced, a pedestal to which the firing needle is attached, and a fluid passage. A pedestal chamber for manually accommodating the pedestal in close contact with the side wall, a gunpowder cartridge chamber communicating with the pedestal chamber, to which a gunpowder cartridge can be detachably attached; It comprises water landing detection means electrically connected to the cartridge, and a small hole communicating with the outside air and the pedestal chamber, wherein the small hole is in a position before the firing pin attached to the pedestal pierces the closing plate. It is in When the pedestal chamber communicates with the outside air, the pedestal slides in the pedestal chamber manually or by explosion of gunpowder, and is provided at a position where it is closed by the pedestal after the firing pin has pierced the sealing plate. A pressurized fluid introducing device provided with a locking member for holding the pedestal at a position for closing the pedestal, a fastening rod for engaging a folded floating bag with a fastener for packaging and holding, and the fastening rod can be ejected. A floating bag opening device comprising: a fastening rod mounting body to be mounted on the device; an explosive cartridge having a built-in explosive and detachably mounted in the fastening rod device; and a conducting wire connecting the explosive cartridge and the landing detection means. Wherein the water landing detection means has a positive power supply terminal and a negative power supply terminal to which a DC power supply is connected, the first detection electrode is connected to the negative power supply terminal, and the second detection electrode Is between these pair of sensing electrodes Ignition means connected to a first output terminal of a water landing determination circuit for detecting a current flowing during a body intervening operation and receiving an ignition signal from the water landing determination circuit is provided. Switch means is provided on a bypass line which is connected between the first and second output terminals and connects the positive side power supply terminal and the second output terminal of the water landing determination circuit. The switch means closes when a check signal having a polarity to be an electromotive force and a voltage value exceeding the DC power supply voltage is input through the pair of detection electrodes, thereby closing a bypass line. Is a floating bag inflating device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a compressed fluid introducing device used in a floating bag automatic inflating device according to the present invention. The compressed fluid introduction device 100 includes a compressed fluid cylinder 111 for containing a compressed fluid to be introduced into a floating bag, and a main body 112 on which the compressed fluid cylinder 111 is mounted. The compressed fluid cylinder 111 contains a compressed fluid such as compressed air or carbon dioxide gas, is detachably screwed to the main body 112, and is sealed by a sealing plate 113. The main body 112 is provided with a lever 114 pivotally attached to a shaft 115 at the lower end of the main body 112 as a means for manually inflating the bladder. By pulling the string 116 attached to the lever 114, the lever 114 pushes up the push rod 117 and pushes up the pedestal 118 that contacts the push rod 117. Pedestal 11
8 is pushed up, the firing pin 119 attached to the tip of the pedestal breaks through the sealing plate 113 and the compressed fluid cylinder 1
The pressure fluid in 11 is introduced into a floating bag (not shown) through the fluid passages 120 and 121. The main body 112 is provided with a water landing detection device 122 and an explosive cartridge as a means for automatically inflating the floating bag upon landing. A water landing detection device 122 is detachably attached to the main body 112 via a cover 150 by screws 151. An explosive cartridge chamber 152 is detachably screwed to the main body 112. An explosive 155 is filled in the explosive cartridge, and an ignition ball 154 is incorporated as ignition means. The ignition ball 154 is an ignition agent provided with an ignition heater therein.
Is connected to the landing detection device 122 by a conducting wire.
When the sensor of the water landing detection device is immersed in water, the water landing detection device 122 conducts, a current flows through the ignition heater and is heated, the ignition ball 154 ignites, and the explosive 155 explodes. The explosive gas flows into the pedestal chamber 157 through the passage 156 provided in the explosive cartridge chamber 152, and the pedestal 118
Push up. When the pedestal 118 is pushed up, the firing pin 119 attached to the tip of the pedestal breaks through the sealing plate 113, and the pressure fluid in the compressed fluid cylinder 111 flows into the fluid passage 1.
20, and is introduced into a floating bag (not shown). FIG. 2 is an enlarged sectional view of the pedestal chamber 157 having a cut surface along the line AA in FIG. As shown in FIG. 2, when the pedestal 118 is at a predetermined position in the pedestal chamber 157, a small hole 158 for communicating the pedestal chamber 157 with the outside of the main body 112 is provided on a side wall forming the pedestal chamber 157. . Therefore, when the pedestal 118 is at the predetermined position shown in FIG.
2 and the pedestal chamber 157 communicate with each other, and the pedestal chamber and the fluid passages 120 and 121 communicate with each other, so that the inside of the bladder communicates with the outside air. For this reason, the floating bag automatic inflation device is carried to a high altitude, and even if the air remaining in the floating bag is inflated, it is discharged to the outside through the small hole 158, so that the air remaining in the floating bag at a high altitude is removed. There is no need to provide a special valve device to prevent inflation. As shown in FIG. 1, the pedestal 118 is
7, the ring portion 15 of the pedestal 118
The locking member 160 is in contact with the side surface of the lock 9. Locking member 1
The spring 60 is pressed toward the center axis of the pedestal chamber 157. When this compressed fluid introduction device is used manually or automatically, and the pedestal 118 rises,
The locking member 160 is moved by the spring 161 to the pedestal chamber 157.
Protrude into. It rises and the closing plate 113 is opened by the firing pin 119.
The pedestal 118 that has penetrated the pedestal 118 is
Is pushed back down by a spring 123 provided between the upper surface and the upper surface. However, the locking member 16 is
0 protrudes, so that the pedestal 118 is
Stop at the position. When the pedestal 118 stops above the position of the locking member 160, the small hole 158 is
18 will be closed by the ring portion 159.
Therefore, the fluid sent from the compressed fluid cylinder 111 to the floating bag does not leak out of the small hole 158 through the fluid passages 121 and 120 and the pedestal chamber 157. The conducting wire 163 of the water landing detecting device 122 is connected not only to the compressed fluid introducing device but also to the floating bag opening device. FIG. 3 shows a floating bag opening device 130 used in the floating bag inflating device of the present invention. The floating bag opening device 130 is a stopper 131 for packaging and holding the folded floating bag.
A fastening rod 132 for engaging the fastening rod 132, a fastening rod mounting body 133 for mounting the fastening rod 132 in an ejectable manner, and an injection table 134 for injecting the fastening rod 132 outward. Screw the explosive cartridge 135 detachably. The gunpowder cartridge is filled with gunpowder 136,
An ignition ball 137 is incorporated. The ignition ball 137 is an ignition agent provided with an ignition heater inside, and the ignition ball 137 is connected to a conductor 163 of the water arrival detection device 122 by a conductor 138. When the water landing detection device 122 detects water landing and a current flows through the ignition heater, the ignition ball 137 ignites, the explosive 136 explodes, and the injection table 134 is pushed out in the direction of the arrow.
The abutment bar 132 is ejected outward and the abutment bar 132 is removed from the fastener 131, so that the floating bag is opened.
The injection table 134 is provided with an O-ring 139 to prevent explosive gas from leaking. Explosive gas is a stop rod mounted body 13
3 is discharged to the outside through a small hole 140 provided in the nozzle 3. The floating bag opening device 130 is provided with the stopper rod 13.
No adjustment of the O-ring is required because the 2 is not drawn inward, and the explosive is very economical and the exchange is easy since only the explosive cartridge needs to be replaced. Next, the details of the water landing detection device 122 will be described with reference to the illustrated embodiment. FIG. 4 shows an example of a water landing detection device used in the automatic floating bag inflation device of the present invention. In FIG. 1, reference numeral 1 denotes a circuit of a water landing detection device 122. The water landing detection device 122 includes a water landing determination circuit 2, a DC power supply 4 connected between its power supply terminals 3, 3 ', and It comprises an ignition heater 6 connected between the output terminals 5 and 5 'of the landing determination circuit, and an additional circuit 7 for checking conduction. (Water landing discriminating circuits) 8, 8 'are power supply lines. One end of the power supply line 8 is connected to the positive power supply terminal 3, and the other end is connected to an output terminal via a continuity check additional circuit 7. 5 is connected. The other power supply line 8 'connects between the negative electrode terminal 3' and the output terminal 5 'via a pair of detection electrodes 9 and 9' which are conductive when water landing is detected. That is, 8'a is a line connecting the power supply terminal 3 'and the detection electrode 9 and 8'b is a line connecting the output terminal 5' and the detection electrode 9 '. . The detection electrode 9 'is connected to a cover 150 made of a conductive material in the automatic bladder inflatable device.
It is a so-called frame ground, and the detection electrode 9
When 9 and 9 '(or cover 150) are immersed in water, a weak current flows between these electrodes via water. Reference numeral 10 denotes an NPN transistor whose emitter is grounded, the collector of which is connected to the power supply line 8 via a resistor 11, and the emitter of which is connected to the power supply line 8'b. By making the resistor 11 a variable resistor, it is possible to detect not only seawater but also other liquids, for example, fresh water. A Zener diode 12 has an anode connected to the collector of the NPN transistor 10 and a cathode connected to the power supply line 8 via a resistor 13. Reference numeral 14 denotes a PUT having a gate connected between the Zener diode 12 and the resistor 13, an anode connected to the power supply line 8, and a capacitor 15 interposed between the gate and the anode. Have been. The cathode of the PUT 14 is connected to a power supply line 8'b via resistors 16 and 17 connected in series. Reference numeral 18 denotes an NPN transistor whose emitter is grounded. The base of the transistor 18 is connected between the resistor 16 and the resistor 17. The collector of the transistor 18 is connected to the base of the transistor 10. Line 8 and its emitter is connected to the power line 8'b
It is connected to the. When the sensing electrodes 9 and 9 'are immersed or not immersed in water due to a change in the water surface at the time of landing, the terminal potential of the electrolytic capacitor 21 is reduced by the PUT 14 and the transistor 10, This is provided so as not to affect the operation state of the water landing discriminating circuit consisting of 18, thereby ensuring the reliability of the charging operation of the electrolytic capacitor 21 at the time of landing on water. Reference numeral 22 denotes a resistor, which is connected in parallel to the electrolytic capacitor 21. A Zener diode 23 has an anode connected to the power supply line 8'b and a cathode connected to the cathode of the diode 20 via a resistor 24. A PUT 25 has a gate connected between the Zener diode 23 and the resistor 24, an anode connected to a terminal of the resistor 24 on the opposite side of the Zener diode 23, and a gate between the gate and the anode. Has a capacitor 26 interposed. Further, the cathode of the PUT 25 is connected to the output terminal 5. At the time of landing, when the cover 150 to which the detection electrodes 9 and 9 'are connected comes into contact with water, the detection electrodes 9, 9'
The current flowing between 9 ′ is converted into a voltage by the resistor 13, and this value is determined by the Zener diode 12 and the PUT 14 to be equal to or higher than the Zener voltage. The PUT 14 and the transistor 18 are turned on, and the transistor 10 is turned off. When the terminal 21 is charged and its terminal voltage becomes equal to or higher than the Zener voltage of the Zener diode 23, the PUT 25 is turned on, and a current flows through the ignition heater 6. When the detection electrodes 9 and 9 'are not immersed in water or when only rainwater or the like is applied, the operation is completely opposite to the above, and no current flows to the ignition heater 6. Next, a description will be given of a continuity check to determine whether or not the ignition heater 6 serving as ignition means in the water arrival detection device 122 is disconnected. When the ignition heater 6 is disconnected, the explosive does not explode because the ignition heater 6 is not heated, and the floating bladder does not automatically expand even if it lands. Therefore, it is necessary to periodically check the continuity of the landing detection circuit of the landing detection device 122. The above-mentioned water landing detection device 122
Has a positive power supply terminal and a negative power supply terminal to which a DC power supply is connected, the first detection electrode is connected to the negative power supply terminal,
A second detection electrode is connected to a first output terminal of a water landing determination circuit that detects a current flowing between the pair of detection electrodes when a liquid intervenes between the pair of detection electrodes, and outputs an ignition signal from the water landing determination circuit. An ignition means which is operated upon receiving is a water landing detection device connected between the first and second output terminals of the water landing determination circuit, and connects the positive side power supply terminal and the second output terminal of the water landing determination circuit to each other. A switch means is provided on the bypass line to be connected, and when a check signal having a polarity that becomes a back electromotive force with respect to the DC power supply and a voltage value exceeding the DC power supply voltage is input through the pair of detection electrodes, Since the switch means is closed and the bypass line is closed, the disconnection check can be performed with the ignition heater as the ignition means connected to the apparatus. The continuity check of the water landing detection device 122 can be performed by the following continuity check device 29, for example. The circuit configuration of the continuity check device 29 will be described with reference to FIG. In the figure, 30 is a DC power supply,
One of the power supply lines 31, 31 'is a plus line, 3
1 'is a minus line. The DC power supply 30
The power supply voltage value of the DC power supply 4 of the water landing detection circuit 1 is set higher than the power supply voltage value. A push button switch 32 has one end connected to the plus line 31 and the other end connected to an input terminal of a switch control circuit 34 for controlling the opening and closing of a switch 33 provided on the plus line 31. . When the push button switch 32 is pressed, the switch 33 is closed only for a short period of time defined by the switch control circuit 34. Such a switch 33 and the switch control circuit 34 It can be configured using a multivibrator IC. The reason why the continuity check device 29 is operated only for a short time is that the ignition heater 6 of the water landing detection circuit 1 at the time of the continuity check.
If the current flowing through the DC power supply 4 is large, the ignition of the ignition heater 6 may cause unexpected ignition of the ignition ball 154, and the power supply used as the DC power supply 4 may be damaged. Reference numerals 35 and 35 'denote a pair of tester terminals, one of which is connected to the switch 33 via a resistor 36 and a constant current diode 37 connected in series, and the other 35' is a minus line 31 '. It is connected to the. Reference numeral 38 denotes an operation amplifier, and two input terminals are connected to both terminals of the resistor 36, respectively. An RS flip-flop 42 has a set terminal connected to the output terminal of the comparator 39 and a reset terminal connected to the reset switch 4.
The Q output terminal is connected to the minus line 31 'via resistors 44 and 45 connected in series, and its emitter is connected to the minus line 31'. Next, a description will be given of a circuit operation at the time of disconnection check of the water landing detection device 122 using the continuity check device 29. FIG. 6 shows an equivalent circuit of the water landing detection circuit 1 and the continuity check device 29 at the time of disconnection check. That is, in the equivalent circuit 49 of the water landing detection circuit 1, the detection electrode 9 'is connected to the positive electrode of the DC power supply 4 via the ignition heater 6, the resistor 28, and the diode 27, and the detection electrode 9 is connected to the negative electrode of the DC electrode 4. It is connected to the. Note that the resistance value of the ignition heater 6 is r (Ω), the resistance value of the resistor 28 is R (Ω), the forward voltage drop of the diode 27 is V _f (V), and the voltage of the DC power supply 4 is Let the value be e (V). On the other hand, the equivalent circuit 5 of the continuity check device 29
At 0, the tester terminal 35 is connected to the positive electrode of the DC power supply 30 via the switch 33 and the ammeter 51, and the tester terminal 35 'is connected to the negative electrode of the DC power supply 30. Note that the voltage value of the DC power supply 30 is E (V).
Then, E> e. Thus, one of the tester terminals 35 and 35 ′ of the continuity check device 29 is connected to the detection electrode 9 ′ of the landing detection circuit 1, and the other 35 ′ is connected to the detection electrode 9. When the push button switch 32 is pressed, the switch 33 is closed for a short time. Therefore, when the ignition heater 6 is not disconnected, a current flows. Assuming that this current value is I, Is detected by the continuity check device 29.
When the ignition heater 9 is disconnected, I ≒ 0. As an actual circuit operation of the continuity check device 29, the voltage generated at the terminal of the resistor 36 due to the flow of the current I is detected by the operating amplifier 38, and the output value and the voltage dividing resistors 40 and 41 are detected. Is compared with a reference voltage value defined by the comparator 39, the output of the comparator 39 is latched by the RS flip-flop 42, and the LED 48 is turned on or blinks by turning on / off the transistor 46, and the disconnection of the ignition heater 6 or An announcement of continuity is made. That is, assuming that the resistance values of the voltage dividing resistors 40 and 41 are R40 (Ω) and R41 (Ω), when the current I flows through the resistor 36, the comparator 39
Positive input voltage Each resistance value is selected so as to be larger. Thus, the ignition heater 6 of the landing detection circuit 1
When the disconnection is checked, the positive electrode of the DC power supply 30 of the continuity check device 29 → the switch 33 → the tester terminal 35 → the detection electrode 9 ′ of the water landing detection circuit 1 → the ignition heater 6 → the resistor 28 → the diode 27 → the DC power supply 4 → the detection electrode 9 A circuit is formed from the tester terminal 35 'of the continuity check device 29 to the negative electrode of the DC power supply 30. By detecting the current I flowing through the circuit, the disconnection of the ignition heater 6 can be easily checked. That is, with regard to the water landing detection circuit 1, only the continuity check additional circuit 7 is required, and the detection electrodes 9, 9 'can be used as check terminals.
Further, regarding the continuity check device 29, the switch control circuit 3
By the instantaneous switching control of the switch 33 by 4, unexpected ignition of the ignition ball 154 by the ignition heater 6 can be avoided. According to the automatic bladder inflating device of the present invention,
Unlike a conventional floating bag automatic inflation device, since a seawater battery is not used, it is not necessary to replace the battery every year, and management becomes easy. Further, according to the automatic inflatable bladder of the present invention, unlike the conventional automatic inflatable bladder, it is possible to detect landing not only in seawater but also in fresh water and used in lakes and rivers. be able to. The water detection apparatus used in the automatic bladder inflating device of the present invention connects the pair of detection electrodes of the water detection apparatus and the detection terminal of the continuity check device separately at the time of disconnection check. When the start switch is turned on, the switch means of the continuity check device is momentarily closed, a check signal is sent to the pair of detection electrodes of the water landing detection device, and the bypass line is closed by the switch means of the water landing detection device. Therefore, the current flowing to the ignition means at this time can be detected by the continuity check device, so that it is not necessary to remove the ignition means and to add a recheck terminal for individually designing a disconnection detection circuit. Further, the configuration can be made at a low cost without increasing the number of parts or inducing circuit malfunction.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial cross-sectional view showing a schematic part of a compressed fluid introduction device used in a floating bag automatic inflation device of the present invention. FIG. 2 is an enlarged sectional view taken along line AA of FIG. FIG. 3 is a sectional view schematically showing a floating bag opening device used in the automatic floating bag inflating device of the present invention. FIG. 4 is a circuit diagram of a water landing detection device in the floating bag automatic inflation device of the present invention. FIG. 5 is a circuit diagram of a continuity check device that checks continuity of the water landing detection device of FIG. 4; FIG. 6 is a diagram showing an equivalent circuit of a water arrival detection device and a continuity check device during a continuity check. [Description of Signs] 1 ... Water landing detection circuit, 2 ... Water landing determination circuit, 3 ...
-Positive power supply terminal, 3 '... Negative power supply terminal, 4 ... DC power supply, 5 ... Second output terminal, 5' ... First output terminal, 6 ... Ignition heater , 7 ... additional circuit for checking continuity, 8 ... power line, 8 '... power line, 9 ... first detection electrode, 9' ... second detection electrode, 10 ... .Transistor, 11... Resistor, 12.
..Zener diodes, 13 ... resistors, 14 ...
PUT, 15: capacitor, 16: resistor, 17
... Resistance, 18 ... Transistor, 19 ... Resistance, 20 ... Diode, 21 ... Electrolytic capacitor, 22 ... Resistance, 23 ... Zener diode,
24: resistor, 25: PUT, 26: capacitor, 27: diode, 28: resistor, 29
..Continuity check device, 30 DC power supply, 31
Power line 31 ′ power line 32 push button switch 33 switch 34 control circuit 35 tester terminal 35 ′ tester terminal 36 ..Resistance, 37 ... constant current diode, 38 ... operating amplifier, 39 ... comparator,
40 ... voltage dividing resistor, 41 ... voltage dividing resistor, 42 ...
RS flip-flop, 43 reset switch, 44 resistor, 45 resistor, 46 transistor, 47 resistor, 48 LED, 49
··· Equivalent circuit, 50 ··· Equivalent circuit, 51 ··· Ammeter, 100 ··· Compressed fluid introduction device, 111 ··· Compressed fluid cylinder, 112 ··· Main body, 113 ··· Closing plate,
114: lever, 115: shaft, 116: string, 117: push rod, 118: base, 119
..Striking pin, 120 ... Fluid passage, 121 ... Fluid passage, 122 ... Water landing detecting device, 123 ... Spring, 130 ... Floating bag opening device, 131 ... Clamping, 132. ..Retaining rods, 133...
134: injection table, 135: gunpowder cartridge,
136 ... explosive, 137 ... ignition ball, 138 ...
Conductor, 139 ... O-ring, 140 ... Small hole, 1
50 ... cover, 151 ... screw, 152 ... explosive cartridge chamber, 154 ... ignition ball, 155 ...
Gunpowder, 156 ... passage, 157 ... pedestal, 158
..Small holes, 159 ring members, 160 locking members, 161 springs, 163 conductive wires

Continuation of front page    (72) Inventor Tsuneo Kasama             1847 Sugao, Akiruno, Tokyo             In the company

Claims (1)

Claims: 1. A main body, a compressed fluid cylinder mounted on the main body and sealed with a sealing plate to seal the compressed fluid, a fluid passage for introducing the compressed fluid into the floating bag, and The firing pin provided in the main body, the pedestal to which the firing pin is attached, and the fluid passage are communicated with each other, and the pedestal is manually housed in close contact with the side wall so that the sealing plate can be broken through. A pedestal chamber, an explosive cartridge chamber that communicates with the pedestal chamber, and into which the explosive cartridge can be detachably mounted, water landing detection means detachably attached to the main body, and electrically connected to the explosive cartridge, And a small hole communicating with the pedestal chamber, wherein the small hole communicates with the pedestal chamber and the outside air when the firing pin attached to the pedestal is at a position before breaking through the sealing plate, The pedestal is manual After the firing pin has slid through the pedestal chamber due to the explosion of explosive and the firing pin has pierced the sealing plate, it is provided at a position to be closed by the pedestal, and a locking member for holding the pedestal at a position for closing the small hole is provided. The compressed fluid introducing device provided, a fastening rod for engaging the folded floating bag with a fastener for packaging and holding, a fastening rod mounting body for ejectably mounting the fastening rod, and a built-in gunpowder, A floating bag opening device including a gun cartridge removably mounted in the stick device and a lead wire connecting the gun powder cartridge and the water landing detection means, wherein the water landing detection means is connected to a DC power supply. A first power supply terminal and a negative power supply terminal, wherein the first detection electrode is connected to the negative power supply terminal, and the second detection electrode is connected when a liquid is interposed between the pair of detection electrodes. To detect the current flowing through Ignition means connected to a first output terminal of the water discrimination circuit and operated in response to an ignition signal from the water discrimination circuit is connected between the first and second output terminals of the water discrimination circuit. Switch means is provided on a bypass line connecting the positive power supply terminal and the second output terminal of the water landing discrimination circuit, and has a polarity which becomes a back electromotive force with respect to the DC power supply and has a voltage value of the DC power supply voltage. The switch means closes when a check signal exceeding the above is input through the pair of detection electrodes, thereby closing the bypass line.