JP4679127B2 - High pressure gas filling equipment - Google Patents

Description

  The present invention relates to a filling device that fills a gas container with a high-pressure gas such as a liquefied gas, and in particular, it is quick and easy to attach and detach (impact) without filling the filling nozzle into the filling port of the gas container. ) It relates to a proposal of a connection mechanism that pursues energy saving.

Conventionally, this type of filling device is hugging a pair of left and right hooks that can be slid freely on the left and right sides of the body behind the valve body of the open / close valve (head valve) above the gas container. After that, the filling nozzle inserted into the rod tip so as to be elastically slidable by the advancement of the piston rod which is incorporated in the container so as to be able to advance and retreat in a state of protruding from the front wall of the container. The gas container is fitted (impregnated) in the filling port. In other words, the tip of the filling nozzle is fitted into the filling port by sandwiching the valve body from the front and back by a filling nozzle fitted into the filling port and a pair of left and right hooks hooked behind the valve body. The type to hold is known (patent document 1).
In addition, a filling nozzle that is inserted into the container attached to the lower end side of the swinging arm so as to be slidable in an elastic manner in a state of protruding from the tip of the container is placed in the filling port portion of the gas container by an arm swing method. A type is known in which the tip of the nozzle is fitted into (filled into) the filling port.

And the filling apparatus of the said patent document 1 and the patent document 2 comprised in this way is inserted and connected by the sealing state in which the front-end | tip part of a filling nozzle does not leak in a filling port part, When the valve body of the on-off valve part provided at the rear part is detached from the valve seat of the valve part, the on-off valve part is opened and the gas container is filled with high-pressure gas. Yes.
The high-pressure gas is a general term for all liquefied gases such as liquefied petroleum gas (LPG), liquefied natural gas (LNG), liquefied nitrogen gas or liquefied oxygen.

However, the device described in Patent Document 1 is thought to be very easy to handle because the tip of the filling nozzle is light, but the head body of the gas container is hooked from behind and the body is sandwiched between the filling nozzles. Therefore, a large operation (stroke) is required for the piston rod, which tends to increase the size.
In addition, since the filling nozzle is fitted and held in the filling port portion of the gas container by sandwiching the head body by a pair of hooks hooked from the left and right behind the head body, When the core misalignment of the filling nozzle has occurred, the core misalignment is not corrected and the filling nozzle may be fitted into the filling port.
That is, the filling nozzle is inserted into the filling port so that the head body can be sandwiched by the pair of left and right hooks, so that the filling nozzle in the left and right diameter directions of the left and right filling ports provided with the hooks. There is a possibility that slight misalignment of the core may be corrected in the process of being fitted into the filling port, but the filling is not performed at all in the vertical diameter direction of the filling port where no hook is provided. The result is that the nozzle is abutted and fitted into the filling port, and repeated fitting in such a misalignment state reduces the amount of the seal member such as an O-ring provided at the tip of the nozzle. As a result, there is a problem that not only the deterioration of the sealing member may be accelerated, but also the sealing state may be deteriorated to cause gas leakage.

  Further, the device described in Patent Document 1 is a latching clamp on the head body by a pair of left and right hooks. That is, since it is a connection structure with two points on the left and right sides, the filling nozzle is apt to be twisted when fitted to the filling port portion, thereby improving the durability of the seal member more quickly. Problems remained to be solved.

  Furthermore, in the device described in Patent Document 1, after the pair of left and right hooks are hooked on the head body, the tip portion is abutted into the filling port portion of the gas container by the movement of the piston rod that starts moving forward from the retreat limit. Since the movement of the filling nozzle to be attached and the movement of the valve body detaching from the valve seat and opening are performed almost simultaneously, the collision of the tip of the filling nozzle into the filling port If the above-mentioned problem occurs in the sealing state due to the fitting, there is a risk of gas leakage.

  And, in the case of the device described in Patent Document 2, since it is a connection structure in which the filling nozzle is pushed and fitted into the filling port portion of the gas container by the movement of the swing arm, the device itself is not only complicated and enlarged, When the filling nozzle is fitted to the filling port, a separate support frame for supporting the gas container is required so that the gas container does not fall down. In addition, since the structure is large and complicated, there are problems such as an increase in maintenance costs such as maintenance.

No. 50-36265 JP-A-7-332595

  The problem to be solved by the present invention is that the device itself is small and light, but the filling nozzle portion does not leak into the filling port portion in a state where the misalignment of the filling port portion with respect to the shaft core is reliably corrected. In addition, the improved handling is simple and safe so that the valve opening operation for introducing the high-pressure gas can be performed in a state where the fitting connection is completely performed. An object of the present invention is to provide a high-pressure gas filling device having an excellent connection mechanism.

In order to solve the above-described problems, the present invention provides, in claim 1, a vessel body having a rod mounting hole penetrated in the front-rear direction,
A piston rod having an internal flow path that is inserted into the rod mounting hole of this container so as to be able to move forward and backward and has the rear end side as a gas supply port,
The piston rod is slidably fitted on the tip end side of the piston rod, and is provided with a valve body that is attached to and detached from the valve seat of the gas flow path so as to open and close the communication with the gas flow path by the advance and retreat of the piston rod. A nozzle,
It is arranged on the peripheral wall at the front end side of the container body, and by the advancement of the piston rod, it is detachably engaged with the outer peripheral ring edge of the filling port part of the gas container, and the container body is placed outside the filling port part. Connecting means for detachably connecting the front end opening of the
With the front end opening of the vessel positioned outside the filling port and the tip of the filling nozzle positioned in the filling port, the connecting means is hooked on the outer peripheral ring edge of the filling port. The first movement of the piston rod which stops and moves forward from the retreat limit until the tip end portion of the filling nozzle is abutted and fitted into the filling port portion, and is further advanced from the first operation to move the valve body from the valve seat A high-pressure gas is filled in the gas container by a two-stage movement of the piston rod that moves forward with a second movement of the piston rod that moves to release the valve,
The connecting means is loaded in an appropriate number of ball loading holes in the front end peripheral wall of the vessel body having an inner diameter approximately the same as the outer diameter of the filling port portion, and is provided so as to be inward and retractable. And a locking ball that locks to an edge of the outer ring of the filling port,
The locking balls are connected to the front end side peripheral wall through a means connected to the piston rod so as to slide back and forth in synchronization with and / or following the forward and backward movement of the rod. And inwardly projecting from the respective ball loading holes to the outer peripheral side of the filling port portion, while being in the retracted position, the sleeve is configured to release the biasing force and immerse into each ball loading hole,
Furthermore, a stopper member for regulating the advance position of the sleeve in the vicinity of the edge of each ball filling hole located on the front end opening side of the front end side peripheral wall of the vessel body or in the circumferential direction along the opening edge. In addition, a resilient member is disposed between the sleeve and the sleeve so that the length of the piston rod is further compressed by the second operation of the piston rod that advances further from the time when the advancement of the sleeve is restricted by the stopper member. It is in the filling apparatus of the high pressure gas characterized by being.

The connecting means is optional as long as the sleeve can be connected to the piston rod so that the sleeve slides back and forth in synchronization with and / or following the forward and backward movement of the piston rod.
For example, the lower end is fixed to the piston rod at several positions in the circumferential direction at the rear end of the sleeve on the front end side wall of the body to which the sleeve is attached. A first member protruding outside the body,
A first end is fixed to the first member, and the other end is connected to the sleeve via an axially elongated hole opened to the other end so as to be axially movable within an appropriate stroke size range. A member,
Until the advance of the sleeve synchronized with the first movement of the piston rod is restricted by the stopper member, the sleeve remains in the extended state, and the second movement of the piston rod further advances from the time when the advance of the sleeve is restricted by the stopper member. It is preferable that the elastic member is formed between the first member and the sleeve so that the length is compressed and displaced (Claim 2).

Since the high-pressure gas filling device of the present invention is configured as described above, the following effects are obtained.
According to the configuration of the first aspect, the front end opening of the container located outside the filling port of the gas container is urged inward by a sleeve that slides forward in synchronization with the advance of the piston rod. The circumferentially engaging balls are connected to the filling port portion by hooking them to the outer peripheral ring edge, so that the filling nozzle provided on the tip end side of the piston rod is connected to the axial center of the filling port portion. On the other hand, when the misalignment has occurred, it is corrected by contact in the circumferential direction with respect to the outer peripheral surface of the filling port portion of each locking ball. Thereby, the front-end | tip part of a filling nozzle is fittingly connected in the filling port part in the state aligned with the filling port part.
Further, by the first operation in which the piston rod moves forward from the retreat limit, the container is connected to the filling port portion of the gas container and the filling nozzle is fitted into the filling port portion, and further advance toward the forward limit. By the second operation of the piston rod, the valve opening of the filling nozzle is released from the valve seat of the rod mounting hole, whereby the filling of the high pressure gas into the gas container is started. That is, the gas filling into the gas container is performed by two-stage movement of the advancing Pillton rod.
Therefore, unlike the conventional device, the seal member such as an O-ring attached to the tip of the filling nozzle is not pressed down, and the seal member is uniformly pressed in the circumferential direction on the inner surface step portion of the filling port. The filling nozzle can be fitted into the filling port portion in the squeezed state. As a result, it is possible to prevent deterioration of the seal member and remarkably improve the durability effect of the device itself. As a result, it is expected to save energy such as reducing maintenance costs by preventing consumable parts such as the seal member. be able to.
In addition, the sealing of the filling port is ensured, and after the container is connected to the filling port and the filling nozzle is fitted into the filling port, the valve opening operation is performed to fill the high-pressure gas. As a result, the gas can be effectively prevented from leaking and the safety can be improved.
Furthermore, if the connection of the piston rod to the filling port portion by the first operation is incomplete, the valve rod is not detached from the valve seat by the second operation of the piston rod. In other words, the detachment of the valve body from the valve seat is performed by the second operation only when the distal end opening of the container is completely connected to the filling port by the first operation. Thereby, safety can be further improved.

  Further, when the filling nozzle is fitted and connected in the filling port, the front end opening of the container is loosely fitted outside the filling port of the gas container, and the tip of the filling nozzle is loosely inserted in the filling port. In this state, the piston rod is moved forward so that the hooking connection to the outside of the filling port portion and the filling nozzle is fitted in the filling port portion. Can be attached to and removed from the filling port. That is, for example, when the piston rod is advanced and retracted by sucking and discharging compressed air (air pressure), the supply amount of the compressed medium when the piston rod is advanced and retracted is small, so that the compressed air supply device and the like can be downsized. It can be expected to be practical and has a great economic effect in terms of maintenance and energy saving.

According to the second aspect of the present invention, the first movement of the piston rod according to the first aspect causes the sleeve to move forward synchronously so that the container body is latched and connected to the outer periphery of the filling port portion, and each locking ball is moved inward. The high pressure gas is filled by releasing the valve seat of the filling nozzle from the valve seat of the rod mounting hole by the movement of urging and projecting from each ball loading hole to the outer peripheral side of the filling port and the second operation of the piston rod. The movement of opening the valve to start can be reliably and effectively performed.
Therefore,

  The best embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a longitudinal sectional view showing an example of an embodiment of the filling device of the present invention, in which 1 is a vessel body, 2 is a piston rod, 3 is a filling nozzle, 4 is a connection means, and a front end opening of the vessel body 1 The connecting means 4 will be described later in a state where the portion is positioned outside the filling port portion W-1 of the gas container W and the tip end portion of the filling nozzle 3 is positioned in the filling port portion W-1. The ball 4-1 is engaged with the outer peripheral ring edge 5 of the filling port W-1 and moves forward from the retreat limit until the tip of the filling nozzle 3 abuts in the filling port W-1. The piston rod 2 is configured to perform a first operation of the piston rod 2 and a valve rod which is further advanced from the first operation and opens the valve body 7 of the filling nozzle 3 by releasing a valve body 7 from a valve seat 6 which will be described later. The high pressure gas is filled into the gas container W by the second operation of No. 2.

The body 1 is formed in an outer shape in which the front half side is a straight pipe portion and the rear half side is a large-diameter stepped pipe portion, and a filling port portion W-1 of the gas container W is formed on the inner shaft core. A rod mounting hole 8 having an inner diameter approximately the same as the outer shape and penetrated in the front-rear direction is provided so that the piston rod 2 can be inserted and retracted forward and backward.
In addition, a cylinder chamber 9 in which the piston 2-1 of the piston rod 2 is housed is provided on the inner peripheral surface of the rod mounting hole 8 located at the rear half side in a substantially midway portion in the length direction, and air to the cylinder chamber 2-1 is provided. The piston rod 2 is moved forward and backward by the intake and exhaust of the compression catalyst such as pressure.

  In the figure, reference numeral 10 denotes a valve button provided in a direction orthogonal to the rear end side of the container body 1, and a compressed medium supply port 11 communicating with the valve button 10 is opened at the rear end of the container body 1. Two medium introduction holes 12 and 13 communicating from the button 10 to the rear part and the front part of the cylinder chamber 9 are provided (see FIG. 4), and the rear or front of the cylinder chamber 9 is operated by pressing the valve button 10. The piston rod 2 is moved forward or backward by introducing a pressing medium in a timely manner.

The piston rod 2 is formed in such a length that the rear end side protrudes from the rear end surface of the body 1 with the front end side immersed in the front end side of the rod mounting hole 8 of the body 1 and is elastically pressed toward the front end side. In addition to communicating with the filling nozzle 3 that is slidably inserted, an internal channel 15 having a gas supply port portion 14 on the rear end side is provided in the internal shaft core.
A valve seat 6 protruding in an inward ring shape is provided in the internal flow path 15 on the downstream side where the rear end of the filling nozzle 3 is inserted, and the valve body 7 of the filling nozzle 3 is connected to the piston rod 2. It is configured to be seated by advancing and retracting operations (see (a) and (c) of FIG. 5).

The filling nozzle 3 is formed on the downstream side of the internal flow path 8 of the piston rod 2 with a predetermined thickness and length that is slidably assembled and inserted in a state of protruding from the tip of the piston rod 2. The valve body 7 is integrally provided at the end, and gas introduction holes 17 communicating with the internal filling flow path 16 are opened at several peripheral walls around the valve body 7 so that the valve body 7 is detached from the valve seat 6. When the valve is opened, the high-pressure gas sent from the upstream side of the internal flow path 15 is introduced into the internal filling flow path 16 from the respective introduction holes 17 and the filling port W− of the gas container W to be fitted and connected. The filling of the container W from 1 is performed.
Further, a sealing member 18 such as an O-ring is attached to the tip of the filling nozzle 3 so as to be in close contact with the inner wall inclined portion 19 in the filling port portion W-1 by the first operation of the piston rod 2 moving forward. .

Then, the filling nozzle 3 elastically mounts a coil spring 21 from the rear end of the valve body 7 to the locking ring portion 20 provided on the inner peripheral surface on the upstream side of the internal flow path 15 of the piston rod 2. The valve body 7 is always urged in the direction of the valve seat 6 so as to be elastically seated on the valve seat 6.
In other words, the filling nozzle 3 is always elastically biased in a direction in which the filling nozzle 3 projects from the tip of the piston rod 2.

  The connecting means 4 serves to detachably connect the front end opening of the container body 1 to the outside of the filling port W-1 by moving the piston rod 2 back and forth. A locking ball 4-1 is loaded in an appropriate number of ball loading holes 22 provided at intervals so as to be able to protrude and retract inwardly, and locked to the outer peripheral ring edge 5 of the filling port W-1. The front end side peripheral wall is connected to the piston rod 2 through the connecting means 24 and is mounted so as to slide back and forth in synchronization with and / or following the forward and backward movement of the rod 2. While the stop ball 4-1 is urged inward to protrude from the respective ball loading holes 22 to the outer peripheral side of the filling port portion W-1, the urging force is released when the ball is in the retracted position, and the respective ball loading holes 22 are released. It consists of a sleeve 4-2 that immerses you inside.

The ball loading holes 22 are formed in several places at equal intervals on the peripheral wall of the front end opening of the vessel body 1, in the illustrated example, in six places as shown in FIG. It can be loaded so as to protrude inward.
In addition, the ball loading hole 22 is configured so that the inner end opening edge facing the rod mounting hole 8 has a slightly smaller diameter so as to prevent inward falling off, and the outward falling is prevented by a stopper member 28 described later. I am trying to get it. The material of the locking ball 4-1 is not particularly limited, but is made of a steel ball in this example.

The sleeve 4-2 is formed in a ring shape having an inner diameter equal to the outer diameter of the straight tube portion of the vessel body 1 and having an appropriate width (length), and slides back and forth on the outside of the stret tube portion. Can be installed freely.
An inner peripheral recess 25 is formed on the rear end side of the inner peripheral surface of the sleeve 4-2 so as to pass through the rear end surface, so that one end side of a later-described resilient member 24-3 is in pressure contact.

  The stopper member 28 regulates the forward movement when the sleeve 24-2 moving forward in synchronization with the forward movement of the piston rod 2 moves forward to the forward movement position for urging each locking ball 24-1 inward. Each of the locking balls 24-1 is fixedly arranged in a circumferential ring shape along the opening edge of the ball loading hole 22, and in this way, it is arranged along the opening edge of the ball loading hole 22. Each locking ball 24-1 is also prevented from falling off to the outside.

  The connecting means 24 is configured to advance the sleeve 4-2 in synchronization with the advance of the piston rod 2, or after the advance of the sleeve 4-2 is restricted by the stopper member 28, the piston rod 2 further advances alone. The sleeve 4-2 is connected to the piston rod 2 so that the sleeve 4-2 moves backward when the piston rod 2 moves backward from the forward limit. It plays a role.

  The connecting means 24 is provided at several positions in the circumferential direction that are open in the axial direction at a length corresponding to the forward / backward stroke range L of the piston rod 2 at a position rearward of the sleeve 4-2 on the peripheral wall on the front end side of the body 1. The first member 24-1 is fixed to the piston rod 2 by fixing the lower end from the long hole 26 in the example shown in FIG. 2), and one end side is bolted to the first member 24-1. A second member 24-2 fixed and bolted to the sleeve 4-2 so that the other end can be axially moved as appropriate through an axial slot 27 opened to the other end; and the sleeve Until the advancement of 4-2 is restricted by the stopper member 28, the stretched state is maintained, and the length is increased by the second operation of the piston rod 2 that further advances from the time when the advancement of the sleeve 4-2 is restricted by the stopper member 28. The first member 24-1 and the sleeve 24-1 It is composed of a Tamahatsu member 24-3 interposed between the recess 25.

Incidentally, in this example, the advance / retreat stroke range L of the piston rod 2 is set to 10 mm, and the first operation in which the piston rod 2 advances from the rear end limit is 5 mm, and the second operation in which the piston rod 2 further advances to the advance limit is 5 mm. Thus, the minimum cylinder structure that can move the piston rod 2 forward and backward with a slight suction and discharge of the compressed medium is provided.
By adopting such a minimum cylinder structure, the apparatus itself can be further miniaturized, and the handleability and economy can be remarkably improved.

The first member 24-1 has an intermediate pipe shape having an appropriate thickness and length, and is fixed to the piston rod 2 by bolting so as to project outside from the long hole 26 of the vessel body. It is designed to be connected to the sleeve 4-2 via -2.
The long holes 26 are opened at two locations in the circumferential direction of the body 1 with an opening width corresponding to the thickness of the first member, and the length of the forward / backward stroke range of the piston rod 2. It can be projected (see FIG. 3).

  The second member 24-2 is formed in a ring cylinder shape having an appropriate length, the rear end opening side is fixed to the protruding end of the first member 24-1 by bolting, and the other end opening side cylindrical wall In this case, after the advance of the sleeve is restricted by the stopper member 28, a long hole 27 is opened so that the Pilton rod 2 can move forward to the limit of advance, and the long hole 27 is bolted to the sleeve 24-2. Trying to get.

  While the elastic member 24-3 is held in an extended state so that the sleeve and the piston rod are connected so that the sleeve advances in synchronization with the first movement of the piston rod that advances from the retreat limit, At the time of the second operation of the piston rod that advances further to the advance limit when the advance of the sleeve is restricted by the stopper member, the length is compressed and displaced so that the piston rod 2 can advance alone to the advance limit ( And is formed by an elastic rubber material or a coil spun ring as shown in the drawing, and, as described above, the recess 25 of the sleeve 4-2 on the outer peripheral surface of the straight tube portion of the vessel 1 and the first It is placed between the members 24-1.

Next, how to use the filling apparatus of this example configured as described above will be briefly described with reference to FIG.
First, as shown in FIG. 5 (a), the front end opening of the vessel 1 is positioned outside the filling port W-1 of the gas container W, and the filling nozzle 3 is placed in the filling port W-1. Set the device itself with the tip positioned. Thereafter, the operation is switched so that the compressed medium is supplied to the rear portion of the cylinder chamber 9 by the push button operation of the valve button 10.

After performing the push button operation of the valve button 10 in this manner, the medium supply valve (not shown) is opened to start supplying the compressed medium.
Then, as shown in FIGS. 5 (a) and 5 (b), the piston rod 2 waiting at the retreat limit starts to advance, and the sleeve 4-2 is moved by the stopper member 28 in synchronization with the first operation to advance. Advances to a regulated advance position, and each locking ball is urged inward by the advance of the sleeve 4-2 and protrudes from the ball loading hole 22 to the outer peripheral side of the filling port portion W-1, and the filling port portion The front end opening of the container 1 is hooked to the outer peripheral ring edge 5 of W-1, and the coaxial shaft core is connected to the outer peripheral surface of the filling port W-1.
At the same time, the front end of the filling nozzle 3 is fitted into the filling port W-1 with the seal member 18 in close contact with the inner wall stepped portion within the filling port W-1.

  In a state where each locking ball 4-1 is urged inward, the advancement of the sleeve 4-2 is restricted by the stopper member 28, and the tip of the filling nozzle 3 is fitted into the filling port W-1. After the swaging, when the piston rod 2 moves forward to the forward limit, the filling nozzle 3 is immersed in the upstream direction of the internal flow path 15 of the piston rod 2 against the coil spring 21. It is pushed so as to move backward (the state shown in FIGS. 5B to 5C). As a result, the valve body 7 of the filling nozzle 3 is detached from the valve seat 6 and the internal flow path 15 and the filling flow path 16 of the filling nozzle 3 communicate with each other, and the filling of the high pressure gas into the gas container W is started. To do.

When a predetermined amount of gas filling operation into the gas container W is completed, the operation is switched so that the compressed medium is supplied to the front portion of the cylinder chamber 9 by the push button operation of the valve button 10.
Then, the piston rod 2 starts to retreat, and the filling nozzle 3 is pushed by the coil spring 21 in synchronization with the retreat (state from FIG. 5C to FIG. 5B). As a result, the valve body 7 of the filling nozzle 3 is seated on the valve seat 6 so as to close the communication between the internal flow path 15 and the filling flow path 16 of the filling nozzle 3, and the gas container W is filled with high-pressure gas. Is stopped. At this time, the compressed elastic member 24-3 is gradually extended (variable).

  When the piston rod 2 is retracted to the retracted position where the valve element 7 is seated and closed on the valve seat 6 and the elastic member 24-3 is extended and displaced to the original length, the piston rod 2 follows the retracted position. Then, the sleeve 4-2 starts retreating and returns to the retreat limit (the state shown in FIGS. 5B to 5A). As a result, the inward urging of each locking ball 4-1 is released and released in the connected state of the front end opening of the container 1 with respect to the filling port W-1, and the filling port W-1 is released. Can be removed from

The longitudinal cross-sectional view which shows an example of embodiment of this invention filling apparatus II-II sectional view of FIG. III-III sectional view of FIG. Sectional view along line VI-VI in Fig. 1 It is sectional drawing which shows the usage method at the time of connecting to the filling port part of a gas container, and (a) positions the front-end opening part of a container outside the filling port part, and is filled in the filling port part. (B) shows a state in which the tip of the nozzle is positioned, and (b) connects the front end opening of the container body to the filling port by the first movement of the piston rod, and the tip of the filling nozzle in the filling port. (C) shows a state in which the valve body of the filling nozzle is detached from the valve seat of the internal flow path of the piston lot and opened by the second operation of the piston rod.

Explanation of symbols

1: Body 2: Piston rod 3: Filling nozzle 4: Connection means
4-1: Locking ball 4-2: Sleeve 5: Outer ring edge 6: Valve seat 7: Valve body 8: Rod mounting hole 9: Cylinder chamber 10: Valve button
11: Pressure medium supply port 12,13: Medium introduction hole
14: Gas supply port 15: Internal flow path
16: Filling channel 17: Gas introduction hole
18: Seal member 21: Coil spring
22: Ball loading hole 24: Connection means
24-1: First member 24-2: Second member
24-3: Elastic member 26, 27: Long hole
28: Stopper member

Claims (2)

A body having a rod mounting hole penetrating in the front-rear direction;
A piston rod having an internal flow path that is inserted into the rod mounting hole of this container so as to be able to move forward and backward and has the rear end side as a gas supply port,
Both the repression slide is inserted freely fitted on the distal end side of the piston rod, the filling comprising a valve body that away seated on the valve seat of the gas passage so as to open and close by advancing and retracting the piston rod the communication between the gas passage A nozzle,
It is arranged on the peripheral wall on the front end side of the container body, and by the advancement of the piston rod, it is engaged with the outer peripheral ring edge of the filling port part of the gas container so that it can be freely retracted and retracted. Connection means for connecting the front end opening so that it cannot be removed;
With the front end opening of the vessel positioned outside the filling port and the tip of the filling nozzle positioned in the filling port, the connecting means is hooked on the outer peripheral ring edge of the filling port. The first movement of the piston rod which stops and moves forward from the retreat limit until the tip end portion of the filling nozzle is abutted and fitted into the filling port portion, and is further advanced from the first operation to move the valve body from the valve seat A filling device configured to fill a gas container with a high-pressure gas by a two-stage forward movement of the piston rod and a second movement of the piston rod that moves to release the valve,
The connecting means is loaded in an appropriate number of ball loading holes in the front end peripheral wall of the vessel body having an inner diameter approximately the same as the outer diameter of the filling port portion, and is provided so as to be inward and retractable. And a locking ball that hooks to an outer peripheral ring edge of the filling port,
The locking balls are connected to the front end side peripheral wall through a means connected to the piston rod so as to slide back and forth in synchronization with and / or following the forward and backward movement of the rod. And inwardly projecting from the respective ball loading holes to the outer peripheral side of the filling port portion, while being in the retracted position, the sleeve is configured to release the biasing force and immerse into each ball loading hole,
Furthermore, a stopper member for regulating the advance position of the sleeve in the vicinity of the edge of each ball filling hole located on the front end opening side of the front end side peripheral wall of the vessel body or in the circumferential direction along the opening edge. In addition, a resilient member is disposed between the sleeve and the sleeve so that the length of the piston rod is further compressed by the second operation of the piston rod that advances further from the time when the advancement of the sleeve is restricted by the stopper member. A high-pressure gas filling device. The linking means according to claim 1 projects from the long holes at several positions in the circumferential direction opened in the forward / backward stroke range of the piston rod to the outside of the body at the rear position of the sleeve on the front end side peripheral wall of the body to which the sleeve is mounted. A first member,
A second end is connected to the first member, and the other end is connected to the sleeve via a long hole opened to the other end side so as to be slidable in the axial direction within an opening length range of the long hole. A member,
Between the first member and the sleeve, the length is compressed and variable by the second operation of the piston rod that further advances from the time when the advance of the sleeve synchronized with the first operation of the piston rod is restricted by the stopper member. A high-pressure gas filling device comprising an elastic member interposed.

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