JP2001213391A - Inflating device for inflatable life-saving apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a inflating device for an inflatable life-saving apparatus preventing the omission of inspection and maintenance of a gas cylinder while confirming only the effectiveness of a water reactive actuator since a conventional inflating device for the inflatable life-saving apparatus for inflating a buoyant body by opening the gas cylinder by the water reactive actuator has no display on the presence of gas in the gas cylinder although displaying the propriety of use of the water reactive actuator. SOLUTION: This inflating device for the inflatable life-saving apparatus is constituted by fitting a housing, which forms a part of the inflating device, with an indicator forming a pair with the gas cylinder and having a display body for displaying the propriety of use by changing its stationary position being slided by the diversion of gas flow blown out of the gas cylinder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inflator for an inflatable life-saving device in which an inflatable body inflated with gas is used as a floating body.

[0002]

2. Description of the Related Art In the event of an emergency on water, there are several types of inflatable rescuers in which an inflatable body is inflated by injecting gas from a gas cylinder into a floating body. There is a so-called inflatable life jacket (hereinafter referred to as PFD) that automatically expands and floats when it is attached to the body and immersed in water.

[0003] The above-mentioned PFD is immersed in water within a few seconds.
Since the expansion device, which is one of the components of the PFD, must operate to form a floating body, an expansion incorporating a so-called water-responsive power device that responds when immersed in water as a power source for opening the gas cylinder. The device is used.

[0004] The inflator is responsive to water, so that the inflator may be splashed, stored in a humid place for a long period of time, or operate unexpectedly after many months. There was a concern.

[0005] The floating body for obtaining the buoyancy of the PFD is formed by injecting a rubber layer or a thermoplastic polyurethane layer laminated on an airtight cloth using an airtight cloth such as a rubberized cloth or a thermoplastic polyurethane coating cloth as a constituent material. As a barrier layer for the gas.

[0006] The above-mentioned polymer materials such as rubber and thermoplastic polyurethane have a gas-permeating property, so that carbon dioxide gas is widely used as the most suitable as an inflating material for general inflatable rescuers. In particular, the permeability was high, and the initial buoyancy of the floating body expanded with carbon dioxide gas was inevitably reduced by 10% after 24 hours.

[0007] In order to prevent the floating body and other parts from being worn or damaged, and to facilitate wearing and storage, the PFD is folded into small pieces and stored in a storage bag, and is stored with a hook-and-loop fastener or a snap button. When inflated, there is also a type in which the hook-and-loop fastener and the snap button are removed by gas pressure so that the floating body expands out of the storage bag.

[0009] Carbon dioxide gas, which is a general-purpose gas in the PFD, is subjected to fine dry ice even if the expansion device is operated and the gas cylinder is opened if the gas is opened for a long time in an extremely low temperature environment such as -30 ° C. The so-called icing phenomenon, which intermittently erupts, does not provide enough pressure to remove all of the hook-and-loop fasteners and snap buttons that hold the storage bag described above, and a complete floating body cannot be formed. possible. Therefore, some of the PFDs stored in the ship's narrow hangar, or PFDs that individuals have placed alongside others, may have been accidentally activated and the gas cylinder opened. When the above-mentioned icing phenomenon occurs, after a long time, the PFD is mistaken as if a part of a hook-and-loop fastener or a snap button which is a closure of the storage bag is simply caught off by something. In some cases, it was difficult to determine that the expansion device was activated based on the appearance of the storage state.

A conventional PFD is made of the above-mentioned materials, parts and structures and has performance, and may be stored in the above-mentioned environment or temporarily placed. In consideration of the above, various determination means for determining whether the PFD can be used or not as it is are constructed. Hereinafter, these will be described.

JP-A-55-51696 and JP-A-63-51696
No. 106199 and U.S. Pat. No. 4,191.310 disclose an inflator in which the housing of the inflator displays a signal indicating that it has been activated when the water-responsive power unit contained therein is activated. It has been disclosed.

That is, the expansion device disclosed in Japanese Patent Application Laid-Open No. 55-51696 is in the state shown in FIG. 13 when it is not operated, but it becomes the state shown in FIG. 17 when it is operated.
At the location of the snap-fit member 174 of colored material, it is possible to identify whether the inflator has been activated or not.

The expansion device disclosed in Japanese Patent Application Laid-Open No. 63-106199 can determine whether or not the expansion device has been operated or not at the position of the drive shaft 4 shown in FIG.

The inflator shown in US Pat. No. 4,191,310, when not in operation, has a colored spring bolt 14 within housing 1, but when in operation, FIG. As shown in the figure, the projection is made outside the housing 1 so that it can be determined whether it is inactive or activated.

Each of the inflators disclosed in the above-mentioned publications can identify whether they are usable or unusable, but it is possible that the water-responsive power device, which is a part of the inflator, has been activated. It merely indicates whether the device is inactive or not, and the PFD expansion device still has a problem to be improved.

That is, when each of the above-mentioned inflating devices is re-set for operation, the activated water-responsive activating device is prepared for reuse.
Before the empty gas cylinder is replaced, the activated display becomes an inactive display.

[0016] In order not to erroneously perform the regeneration set operation, if the water-responsive activating device is kept operating even when the gas cylinder is first replaced, the tip of the firing pin that has broken through the sealing plate of the gas cylinder will be in the gas cylinder. It is in position and will be opened when you screw in a new gas cylinder.
Therefore, when resetting the expansion device, it is necessary to first remove the actuated water-activated power device from the housing, which requires the owner of the PFD or a service station to inspect and repair the PFD. There are concerns that could lead to errors.

An alternative construction to the three known inflators described above is disclosed in US Pat. No. 3,090,979. This inflator keeps the entire amount of gas in the gas cylinder from escaping even if the firing pin breaks through the sealing plate of the gas cylinder, and allows a small amount of escaping gas to flow to the floating body, with the sound emitted at that time.
This is to make it possible to confirm that there is gas in the gas cylinder.

As described above, this inflator is worn or inflated after confirming that gas is present in the gas cylinder. When the inflator is inflated by the inflator, the gas in the gas cylinder is inflated. Since the entire gas flows into the floating body, the effect as a PFD is exhibited, but even if the gas is not used because it is only worn, the gas cylinder is opened, and the gas in the gas cylinder is partially removed from the housing. Since it is open to the compartment, it is impossible to keep it in this state for a long time, and it can be said that it was not used, that is, it did not inflate the floating body, and that the presence of gas was confirmed. The result is the same as inflated use, and the gas cylinder must be replaced with a new one in order to be ready for reuse.

Further, as another structure, there is an expansion device disclosed in US Pat. No. 3,227,309. This inflator breached the sealing plate of the gas cylinder, filled some compartments in the housing with the escaping gas, and in this state, again tried moving the firing pin with the lever, and the lever did not move Then, it is to confirm that the gas exists in the gas cylinder.

This inflator is also described in US Pat.
No. 090,979, PF
It is an inflator that has the function of confirming whether or not gas is present in the gas cylinder prior to wearing or inflating D, but after testing for the presence of gas, it is impossible to store it as it is, Even if the life vest is worn only and not used for inflation, the gas cylinder must be replaced with a new one in the future.

As mentioned above, US Pat. No. 3,090,
No. 979 and U.S. Pat. No. 3,227,309 both presume the use of inflation after opening the sealing plate of the gas cylinder to see if gas is present. It is an expansion device that does not check the presence or absence of gas when it is stored or always worn, it has nothing to do with the situation and the prevention of erroneous work during the work for rehabilitation and restoration. Not something.

[0022]

SUMMARY OF THE INVENTION The present invention relates to a conventional PFD inflator in which a water responsive power device is incorporated in a housing, when the water responsive power device is activated, an indication that the water responsive power device has been activated appears. Misuse or misuse that is likely to occur due to the fact that an empty cylinder will show an inactive display even if the empty cylinder is not replaced with a new one just by regenerating and setting the responsive activation device so that it can be used If the activated water responsive device is re-set for operation in order to eliminate the work, the water responsive device will show the inactive indication, but the inflator housing will still show the disabled indication. After the water-responsive activating device has been set up,
In other words, the inflator is an inflator of an inflatable lifesaving device in which the operation of replacing the empty gas cylinder with a new one is completed, and then the inflator displays an indication of use. It is an object of the present invention to provide an inflatable device for an inflatable lifesaving device that can determine that both a water-responsive activation device and a gas cylinder therein are usable.

[0023]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The present invention provides a firing pin for piercing a sealing plate of a gas cylinder, and a water source as a power source for piercing the sealing plate. A gas cylinder and a display unit that can be connected to the housing having a connection pipe insertion port connected to the inflatable floating body by a gas cylinder and the gas cylinder, and that can be used by the divided gas pressure from the gas cylinder; The above-mentioned problem has been solved by mounting an indicator for changing the display by sliding a display body indicating that the device is unusable at a certain position to constitute an inflating device for an inflatable lifesaving device.

Further, according to the present invention, the indicator preferably comprises:
When the indicator indicating the disabling of the indicator moves, an inflatable type in which the indicator indicating the disabling indicator is attached through a window provided in the coupling for coupling the indicator and the gas cylinder is attached. The above problem was solved by using an inflating device for a lifesaving device.

Further, according to the present invention, the indicator comprises:
The above object has been achieved by providing an inflating device for an inflatable life-saving device in which an indicator for disabling the indicator moves and an indicator for shielding the indicator for enabling the indicator is attached.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS. FIG. 1 is a front view of an inflator of an inflatable lifesaving device according to the present invention (hereinafter, referred to as an “inflator”) from which a gas cylinder and a coupling device to be described later have been removed. A pull cord 3 with a knob 2 is attached to an L-shaped manual lever 4, and when the pull string 3 is pulled, the pull cord 3 is connected via a seesaw type automatic lever described later, irrespective of a water-responsive activation device described later. The firing pin is pushed up to open the gas cylinder.

The housing 1 is mainly composed of a housing base 5 and a screw cap 6 which constitutes a part of a compartment in which a water-responsive activating device is built.

Reference numeral 7 denotes a locking pin which is disengaged when the manual lever 4 is pulled, indicates that the gas cylinder has been manually opened, and prevents accidental rotation of the manual lever 4. Reference numeral 8 denotes a rotation axis of the manual lever 4, and reference numeral 9 denotes a state in which the water-responsive activation device is activated.
The rotating shaft of the rotating seesaw-type automatic lever is a screw nut 10 screwed to the connecting pipe of the inflatable floating body via a gasket, and is a fixture for mechanically and functionally connecting the inflating device to the inflatable floating body. Numeral 11 denotes an air vent hole for releasing the air in the housing 1 when the expansion device is immersed in water.

FIG. 2 is a plan view of FIG. 1 from which the knob 2, the drawstring 3 and the manual lever 4 have been removed. The housing 1 has a gas cylinder mounting port 12. 13 and the tip of the firing pin 14 are visible.

FIG. 3 is a bottom view of FIG. 1 from which the knob 2 and the drawstring 3 are removed, and a bottom cover 15 is fitted to the housing base 5.

FIG. 4 is a partial cross-sectional view taken along the line AA in FIG. 1, and a female screw 16 is cut in the gas cylinder mounting port 12. A firing pin compartment 1 is provided in the housing 1.
7 is provided therein, in which a firing pin 14 fitted with a firing pin O-ring 18 is incorporated. The firing pin 14 is inserted through a spring 19 for returning the firing pin, and the firing pin 14 pierces the sealing plate of the gas cylinder and the tip thereof is inserted into the gas cylinder. Is taken out of the housing 1 so as to return to a state before the operation by a firing pin returning spring 19. When the water-responsive activating device is activated, the firing pin return spring 19 acts in a direction to reduce its power, but has no force to prevent the firing pin 14 from breaking through the sealing plate of the gas cylinder. Reference numeral 20 in the drawing denotes a seesaw-shaped automatic lever that pushes the firing pin 14 toward the sealing plate of the gas cylinder when the water-responsive activating device operates.

FIG. 5 is a partial sectional view taken along the line BB of FIG.
One compartment 22 is provided. The compartment 22 for the water-responsive power unit 21 is
And a stopper spring compartment 25 provided in the screw cap 6 which constitutes a part of the housing 1. The stopper compartment 24 supports the stopper 23 provided in the housing 1.

The water-responsive starting device 21 includes a stopper 23
In addition, a spring receiving flange 26 is provided, and at the tip,
A drive rod 29 having a conical surface 28 that fits into a taper socket 27 formed at the center of the stopper 23.
And an activation spring 30.

The stopper 23 converges the three spool units 31, 31 and 32 shown in FIG. 6 concentrically as shown in FIG. 7 to form a taper socket 27 around the central axis. A binding spool 35, which loses tensile strength in a short time when it is wet around the body of the units 31, 31, 32, for example, is formed by binding paper made of cellulose as a main material as a binding material 33 and holding it with a stopper 34, is shown in FIG. As shown in a vertical cross section in FIG. 8, in the center of the bottom plate, a hole 36 through which the drive rod 29 can penetrate is inserted into a notch 37, and in the center,
A cover 39 having a hole 38 through which the drive rod 29 can pass is fitted.

The stopper 23 having the above-described structure can be used even when a load is applied to the drive rod 29 by the activation spring 30.
The conical surface 28 is engaged with the taper socket 27 and supported so as not to pass through the center portion of the binding spool 35. However, once the stopper 23 becomes wet, the binding material 33 is cut between the spool units 31 and 31. , Binding spring 35
Is untied, the conical surface 28 of the driving member 29 is disengaged from the tapered socket 27 of the binding spool 35, and the tip moves the firing pin 14 toward the gas cylinder sealing plate via the automatic lever 20.

As described above, the stopper 23 normally keeps the activating spring 30 serving as a power source for piercing the sealing plate of the gas cylinder in a compressed state, and once wetted, is compressed as shown in FIG. Activation spring 3
As shown in FIG. 8, the expansion device is provided with a so-called water-responsive operation function of releasing the zero at once.

As shown in FIG. 5, a part of the driving rod 29 passes through an activation spring 30 in a screw cap 6 with a flange 40, and further, the screw cap 6 is attached to the housing base 5. Male screw 41 and female screw 4
When the screws 2 are screwed together, the screw cap 6 is moved toward the top surface through a drop hole 44 provided at the center of the top wall 43 of the screw cap 6.

As shown in FIG. 8, on the end face of the driving rod 29,
The round rivet-shaped display body 45 is connected by a male screw 46 and a female screw 47, and the extreme point of the round rivet-shaped display body 45 is such that the flange 40 of the screw cap 6 comes into contact with the housing base 5 and the compression of the activation spring 30 is completed. When this is done, it reaches the surface position of the top wall 43 of the screw cap 6 and indicates that the water-responsive activation device 21 is usable.

The outer diameter of the round rivet display 45 is
The inner diameter of the inward flange 48 provided at the deepest portion of the drop hole 44 of the screw cap 6 is larger than the inner diameter of the inward flange 48, so that the screw cap 6 does not fall out of the drop hole 44. Therefore,
The activation spring 30 and the driving rod 29 are coupled to the screw cap 6 so as to be relatively movable.

The above-described water-responsive activating device 21 is merely an example. In the present invention, a conventionally known water-responsive activating device can be used. However, the configuration and structure of the water-responsive activation device are not limited.

FIG. 9 is a partial plan view in the vertical direction of FIG. 1. In the housing 1, a seesaw-shaped automatic lever 20, which is driven to rotate by being hit by a driving rod 29, is connected to the rotating shaft 9. The automatic lever 20 that is mounted on the shaft and struck by the drive rod 29 moves to the position shown by the dotted line, and pierces the sealing plate of the gas cylinder (not shown) with the firing pin 14.

The housing 1 is provided with an indicator screw hole 50 for screwing the indicator 49. The indicator screw hole 50 is provided at the bottom thereof with a connecting pipe inserted through a gas passage 51 formed in the housing base 5. It communicates with the hole 52.

The indicator screw hole 50 is made of a transparent material such as acrylic resin or polycarbonate. The indicator screw hole 50 is colored blue in a cylindrical casing 54 having an opening on one side and a top plate 53 on the other side. And an indicator 49 having a built-in non-displayable body 56 which is colored red and indicates that it is unusable.

An O-ring 57 for the casing is fitted into the bottom of the indicator screw hole 50, and gas that has passed through the gas passage 51 passes through the gap between the indicator screw hole 50 and the casing 54 to the outside. Prevents getting out.

The displayable body 55 and the non-displayable body 56 are shown in FIG.
As shown in FIG. 0, a protruding rod 59 from the non-displayable body 56 is tightly inserted and fitted into a hole 58 formed in the displayable body 55 so that both slide integrally in the casing 54, The non-displayable member 56 is fitted into the O-ring 60 for the display, and the O-ring 60 for the display is brought into close contact with the inner wall of the casing 54 so that gas does not leak through the casing 54. It is.

Since the displayable element 55 and the non-displayable element 56 are lightweight, the O-ring 60 for the display element is pressed against the inner wall of the casing 54 so as to be in close contact with each other unless a load is forcibly applied. Stay in a stationary position.

FIG. 11 shows an inflator 61 and an inflatable floating body 62.
And a connecting pipe 64 in which an inflatable floating body 62 connecting pipe fixing seat 63 is attached to the connecting pipe insertion hole 52 of the housing 1 by fusing or bonding. When tightened with the nut 10, the expansion device 61 and the inflatable floating body 62 are mechanically and functionally connected.

When the gas cylinder 65 is opened, the ejected gas passes through the firing pin compartment 17 and reaches the connecting pipe insertion hole 52 as shown in FIG. 9, and further, is connected to a check valve shown in FIG. The inflatable floating body 62 enters the inflatable floating body 62 from the pipe 64 and is inflated.
The small gap in the connection pipe insertion hole 52 formed by the screw nut 10 via the gasket 2 and the gasket temporarily becomes a reservoir for the ejected gas because the flow velocity of the ejected gas is large,
A part of the ejected gas reaches the indicator 49 through the gas passage 51 shown in FIG.

The pressurized non-displayable body 56 slides in the direction of the top plate 3 while discharging the air in the casing 54 to the outside through the air vent hole 66, and pushes up the displayable body 55 to the top plate 53, thereby housing The non-displayable body 56 buried in 1 moves to the position where the displayable body 55 was located.

FIG. 12 is a front view of the expansion device of the present invention.
The gas cylinder 65 connected by 7 is screwed. The coupling 67 is made of rubber or synthetic resin, and is shown in FIGS.
As shown in FIG. 7, the gas cylinder 65 and the indicator 49 have a socket 68 and a cylinder 69, respectively.

An O-ring thick portion 70 is provided at the skirt of the socket 68 through which the gas cylinder 65 is inserted.
When the gas cylinder 65 is screwed into the housing 1, water penetrates between the screw of the gas cylinder mounting port 12 and the screw of the gas cylinder 65,
It serves to prevent corrosion of metals.

A window 71 is provided in the cylinder 69 of the coupling 67, and through this window 71, the displayable body 55 or
Only one of the non-displayable members 56 can be seen.

The method of using the expansion device 61 of the present invention is as follows. The stopper 23 is inserted into the water-responsive activation device compartment 22 of the housing 1 attached to the inflatable floating body 62, and the screw cap 6 having the activation spring 30 is attached.
Is screwed to compress the activation spring 30.

When the activation spring 30 is completely compressed, the round rivet-shaped display 45 reaches the surface position of the top wall 43 of the screw cap 6 to indicate that the water-responsive activation device 21 is in a usable state. , Temporarily used stopper 2
3 is incorrectly inserted, the round rivet-shaped display 45
Is located at the bottom of the recessed hole 44 of the screw cap 6, so that the stopper 23 is known to have been used and can be prevented from being set by mistake.

Next, the gas cylinder 65 is operated by the coupling device 67.
Is screwed into the indicator screw hole 50. Although the indicator 49 is, except for a part, mainly contained in the cylinder 69 of the coupling 67, the indicator 49 can be rotated around the central axis in the cylinder 69, so that the top plate 53 of the indicator 49 is gripped. And can be completely screwed by rotating.

Next, the gas cylinder 65 inserted into the socket 68 of the joint 67 is screwed into the gas cylinder mounting port 12. A part of the gas cylinder 65 is in close contact with the inner wall of the coupling 67 through the hole of the socket 68, but can be rotated around the central axis, so that it can be completely screwed.

The unused gas cylinder 65 is connected to the indicator 49 by a connecting tool 67 to form a set. At this time, the lowermost surface of the non-displayable body 56 in the indicator 49 is at the open end of the casing 54. In the plane position,
Since the display O-ring 60 is in close contact with the inner wall of the casing 54, it does not move unless a load is forcibly applied, but until the indicator 49 is screwed into the housing 1 as shown in FIG. As shown, a flat rivet-shaped pin 72 shown in FIG. 16 reaching the top surface of the displayable body 55 is tightly inserted into an air vent hole 66 penetrating the center of the top plate 53 of the casing 54. A protective cap 73 is screwed into the opening of the casing 54, and the flat rivet pin 72 and the protective cap 73 are removed before the indicator 49 and the gas cylinder 65 are attached to the housing 1. is there. Therefore, when the gas cylinder 65 is unused, the indicator 49 always indicates that the gas cylinder 65 is available through the window 71 of the coupling device 67.

As described above, the water-responsive activating device 21,
When the inflator 61 of the present invention in which the indicator 49 and the gas cylinder 65 have been mounted is immersed in water, the gas cylinder 6
5 is opened to inflate the inflatable floating body 62, and a part of the ejected gas is changed by the indicator 49 from a usable state to a non-usable state. It is configured to visually determine that 65 is empty.

Although the case where the inflating device 61 of the present invention is immersed in water and operated has been described above, the indicator 49 remains on the gas cylinder 6 even when the drawstring 3 is pulled and manually inflated.
5 indicates that it is no longer empty. In other words, if it is not necessary to pull and inflate the drawstring 3 before immersion in the water and not to immerse in the water, the water-responsive activation device 61 keeps displaying that it can be used. Indicates that the gas cylinder 65 is empty, and indicates that the string 3 is expanded by pulling it.
Is reversely pulled to return the manual lever 4 to the original position, thereby preventing an error that easily occurs.

The gas cylinder 6 described in the present embodiment
The connecting tool 67 for connecting the indicator 5 and the indicator 49 shows one form, and the designing of the connecting tool 67 can be changed according to the configuration of the indicator 49. In short, the indicator 49 must have a form and a structure that can be connected to the gas cylinder 65, and the position of the indicator 49 in the housing 1 must be an arrangement that can be connected to the gas cylinder 65.

[0061]

Embodiment 1 FIG. 17 shows an indicator 4 having a different configuration from the indicator 49 described in the embodiment.
9, the indicator 49 is formed of a transparent material such as acrylic resin or polycarbonate, is formed of a cylinder having an opening on one side and a top wall 53 on the other side, and is formed in a cylindrical shape from the top wall 53 into the cylinder. In a casing 54 having an extendable indicator stop 74, a cylindrical indicator 55 is tightly fitted to the indicator stop 74, and an O-ring 60 for the indicator is fitted to the indicator 54. A non-displayable body 56 having a cylindrical shape having an inner diameter larger than the outer diameter of the non-displayable body 55 is built in. Is placed in the lumen of the non-displayable body, and the displayable body 55 is covered with the non-displayable body 56.

As shown in FIG. 18 and FIG.
As shown in FIG. 9, the indicator insertion hole 75 of the coupler 67 having the indicator insertion hole 75 and the gas cylinder insertion hole 76 is inserted, and a gas cylinder (not shown) is inserted into the gas cylinder insertion hole 76. .

The coupler 67 has a shape in which two O-rings are connected to each other. A groove formed around the top plate 53 of the indicator 49 is fitted into the indicator insertion hole 75 so that the indicator 49 is mounted on its central axis. To be screwed into the indicator screw hole 50, and the indicator 49 is prevented from coming off the coupling tool 67 unless force is applied.

The gas cylinder inserted into the gas cylinder insertion hole 76 of the coupler 67 is tightly fitted, but the gas cylinder is rotated so that it can be screwed into the gas cylinder mounting port.

The top wall 53 of the casing 54 and the displayable member stopper 74 are provided with penetrating air vent holes 66 into which flat rivet-like pins 72 whose tips reach the bottom of the non-displayable member 56 are inserted. , Indicator 49 is housing 1
By the time the indicator 49 is screwed into the housing 1, it is prevented from moving when the improper display body 56 hits an obstacle or the like.

The indicator 49 according to the first embodiment, like the indicator 49 according to the above embodiment, is screwed into the housing 1 together with the gas cylinder.
2 and the gas passage 51 are isolated from the outside air, so that the non-display unit 56 does not move unexpectedly,
As long as the gas pressure from the gas cylinder is not applied, it stays at the position at the time of attachment, that is, the position buried in the housing 1, receives the gas pressure to be ejected, and once moves, the impossible display body 56 When the flat rivet-shaped pin 72 is not inserted into the air vent hole 66, the pin remains firmly slid so that it does not move even if it is inserted.

[0067]

The inflator according to the present invention not only indicates whether the water responsive power device is usable or unusable, but also the gas from the gas cylinder once the gas cylinder is opened.
The indicator that changes the indication that the gas cylinder can be used to the indication that it cannot be used is attached to the housing so that the presence or absence of gas in the gas cylinder can be determined without removing the gas cylinder from the housing, so the water responsive starter In addition to the inspection and maintenance of the gas cylinder, the inspection and maintenance of the gas cylinder can be performed without error.

The inflator according to the present invention is constructed by mounting an indicator, which is combined with a gas cylinder, on the housing together with the gas cylinder. When gas is present in the gas cylinder, it always indicates that the gas can be used. Is displayed, disabling is always displayed, and it is possible to confirm whether or not the gas cylinder can be used in a very short time just by looking at the indicator without displaying an incorrect display, so it is extremely effective especially in an emergency .

The indicator of the inflator according to the present invention, once it is attached to the housing together with the gas cylinder, includes a firing pin compartment in the housing, a connecting pipe insertion hole, a gas passage leading to the indicator, and a check valve in the connecting pipe. Is completely shut off from the outside air, so that the non-indicator of the indicator cannot move unless the gas pressure from the gas cylinder acts. That is, while the gas cylinder is attached to the housing, the gas flow path in the housing becomes a negative pressure when the non-display body moves, so that the non-display body is not affected unless the gas pressure from the gas cylinder is applied. The gas flow path is filled with a small amount of residual gas even after the gas cylinder is opened and the non-displayable body moves, so that the non-displayable body has moved. Since it is not possible to move from the position, the display of the indicator is extremely reliable without changing over time.

The PFD equipped with the expansion device of the present invention is
If the dropper is accidentally dropped or inadvertently thrown and a remarkably large impact is applied so that the return spring cannot hold the firing pin in place, the firing pin alone moves due to inertia. Thus, a very small slit-like scratch may be formed on the sealing plate of the gas cylinder. In such a case, since the flow rate flowing out is extremely small, the gas cylinder becomes empty after a long period of time without changing the appearance of the floating body. It is difficult to judge a gas cylinder with such a damage by just looking at the sealing plate, and it is determined whether the gas cylinder is immersed in water or the gas cylinder is weighed.
Even if a gas leak occurs due to such an unexpected event, the indicator indicates that the gas cylinder is unusable, so that it is possible to know the abnormality of the gas cylinder.

Since the housing and the indicator, which constitute a part of the expansion device of the present invention, can be manufactured by molding a synthetic resin, the cost of the expansion device is avoided.

The gas cylinder and the indicator, which constitute a part of the inflation device of the present invention, can be constituted by a coupling so that one gas cylinder and one indicator are combined, so that the gas cylinder or the indicator alone can be attached or removed. Work errors due to replacement can be prevented.

The gas cylinder and the indicator, which form part of the inflating device of the present invention, have a shape and a structure that can be formed by being connected with a fitting that can be manufactured at low cost, and are arranged on the housing. The gas cylinder does not need to be specially machined, and a gas cylinder having a shape and structure that has been generally used can be used, and the cost of the entire expansion device can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view of an expansion device of the present invention with a gas cylinder and a coupling removed.

2 is a plan view of FIG. 1 of the inflator of the present invention with the knob, drawstring and manual lever removed.

FIG. 3 is a bottom view of FIG. 1 of the present invention with the knob and drawstring removed.

FIG. 4 is a partial cross-sectional view taken along line AA of FIG. 1;

FIG. 5 is a partial sectional view taken along line BB of FIG. 1;

FIG. 6 is a spool unit that is a component of the stopper.

FIG. 7 shows a binding spool.

FIG. 8 is a partial vertical cross-sectional view of the water-responsive activating device shown in FIG. 5 when the water-responsive activating device is activated, excluding a housing base.

FIG. 9 is a vertical partial sectional view of FIG. 1;

FIG. 10 is a perspective view showing a displayable body and a non-displayable body to be incorporated in the indicator.

FIG. 11 is a partial cross-sectional side view of an inflatable lifesaving device in which an inflatable device and an inflatable floating body of the present invention are combined.

FIG. 12 is a front view of FIG.

FIG. 13 is a plan view of the coupler.

FIG. 14 is a front view of FIG.

FIG. 15 is a partial cross-sectional front view of a gas cylinder and an indicator constituting a set.

FIG. 16 is a perspective view showing a flat rivet pin.

FIG. 17 is a partial vertical sectional front view showing an indicator and a coupling attached to the housing base in the first embodiment.

FIG. 18 is a front view of the coupler according to the first embodiment.

FIG. 19 is a plan view of FIG. 18;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 housing 5 housing base 6 screw cap 10 screw nut 14 shooting pin 17 firing pin compartment 19 firing pin return spring 21 water-responsive drive device 22 water-responsive drive device compartment 23 stopper 24 stopper compartment 25 trigger spring compartment 27 taper socket 28 conical surface 29 drive rod 43 top wall 44 drop hole 45 round rivet-shaped display body 48 inward flange 49 indicator 50 indicator screwing hole 51 gas passage 52 connecting pipe insertion hole 53 top plate 54 casing 55 displayable body 56 non-displayable body 57 O-ring for casing 58 Hole 59 Protruding rod 60 O-ring for display body 61 Inflator 62 Inflatable floating body 63 Connecting pipe fixing seat 64 Connecting pipe 65 Gas cylinder 6 Vent 67 coupler 68 socket 69 cylindrical 70 Meat pressure section 71 a window 72 flat rivet-like pins 73 the protective cap 74 friendly display body stopper 75 indicator insertion hole 76 a gas cylinder insertion hole

Claims (3)

[Claims] A gas cylinder and a gas cylinder are provided in a housing having a firing pin for piercing a sealing plate of a gas cylinder, a water-responsive starting device as a power source for piercing the sealing plate, and a connecting pipe insertion port connected to an inflatable floating body. An indicator that can be coupled by a coupling tool and that changes the display by sliding and moving the display indicating unusable to a position of the display indicating use is attached at a position of the display that indicates use with the divided gas pressure from the gas cylinder. Inflatable life-saving inflation device. 2. The indicator according to claim 1, wherein when the indicator indicating that the indicator is unusable moves, the indicator indicates the unusability through a window provided in the coupling that couples the indicator with the gas cylinder. The inflation device for an inflatable life-saving device according to claim 1, wherein the display body is located at a position where the display body can be seen. 3. The inflatable lifesaving device according to claim 1, wherein the indicator for indicating that the indicator is unusable moves and the indicator for indicating that the indicator is usable is moved. Expansion device.