Gas filling equipment

Abstract

To provide a gas filling device having improved production efficiency by unitizing a housing body to simplify the assembly and reduce total assembling man-hours.SOLUTION: A gas filling device (100) includes a lower unit (10) storing a heat exchanger (13) on a base frame (1), an intermediate unit (20) located above the lower unit (10) and having an indicator, a top unit (30) located above the intermediate unit (20) and storing a flowmeter (33), and a lateral unit (40) located on both sides of the lower unit (10) and the intermediate unit (20) and storing a filling hose having a filling nozzle at the front end.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a gas filling device that fills a gas fuel, such as hydrogen gas, into a vehicle (FCV) or the like. [Background technology]

[0002] Japan is poor in fossil fuels and relies on imports from overseas, making it vulnerable to international situations. In recent years, hydrogen, which can be produced from a variety of resources, has been attracting attention as an environmentally friendly option and useful for energy security. Fuel cell vehicles that use hydrogen as fuel have been proposed as a solution to this environmental problem. The applicant of the present invention has also proposed a device for stably and efficiently filling gas fuel into the on-board tank of a fuel cell vehicle (see Patent Document 1). Although such a conventional technique (Patent Document 1) is effective, when assembling the gas filling device, the entire frame is assembled, and then devices such as a flow meter, valves, piping, and a gas pipe cooling section are installed and joined to the frame.

[0003] However, the positions and sizes of the bolt fastening holes in the frame are loose, and there is a risk that assembly errors will cause distortion of the frame structure. In addition, the gas pipe cooling unit was the smallest size that could be installed within the frame of the main housing, and because it was a heavy device weighing approximately 200 kg, it was necessary for several people to move it into the frame and connect the piping. The piping also had a primary piping and a secondary piping, and it was a task that required skill to accurately connect the two without damaging (scratching) the metal seal between the gas pipe cooling unit. If the metal seal were to be damaged, hydrogen gas would leak from the damaged area, which could cause a disaster such as an explosion. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2014-109350 A Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention has been proposed in consideration of the problems of the prior art described above, and aims to provide a gas filling device which can improve production efficiency by unitizing the housing body, simplifying assembly and reducing the total assembly labor hours. [Means for solving the problem]

[0006] The gas filling device (100) of the present invention is A lower unit (10) that houses a heat exchanger (13) on a base frame (1); an intermediate unit (20) located above the lower unit (10) and equipped with a display; a top unit (30) located above the intermediate unit (20) and housing a flow meter (33); A filling hose having a filling nozzle at its tip is accommodated on both sides of the lower unit (10) and the intermediate unit (20). side Unit (40) Including, Each of the units has a positioning hole (LH) formed at the overlapping portion of each unit, and a locating pin (LP) inserted into the positioning hole. It is characterized by the following.

[0008] In the present invention, it is preferable that a base frame (1) is provided at the bottom (foundation) and that the base frame (1) is formed with a notch (1A). Effect of the Invention

[0009] According to the present invention having the above-mentioned configuration, each device can be pre-installed in each unit, so that the total number of assembly steps can be reduced. Furthermore, compared to the task of fixing equipment within the frame of the gas filling device (100) constructed by assembling units together, the task of fixing equipment to individual units is easy, and the labor required for the task is significantly reduced.

[0010] In the present invention, each unit is provided with a positioning hole, and if the positioning holes (LH) formed at the overlapping points of each unit have the function of allowing the insertion of a pin (LP), then before each unit is firmly fastened together with bolts, the pin (LP) can be inserted into the positioning hole (LH) to temporarily fasten (temporarily assemble), and then the units can be fastened together with bolts, etc., thereby reducing assembly errors when the units are assembled and reducing distortion of the frame structure. For example, by locating heavy equipment such as the heat exchanger (13) inside the unit in advance, the installation work becomes easier, and other equipment to be connected to the heat exchanger (13) via piping can also be accurately installed using positioning holes, so even an unskilled person can accurately connect, for example, the primary and secondary piping, without damaging (scratching) the metal seal between the gas pipe cooling section. This makes it possible to prevent hydrogen gas leakage due to damage to the metal seal, and to suppress disasters such as explosions. After the units are joined together or the units are joined to the device (for example, by bolting), the inserted pins can be removed. Furthermore, since a cable tie can be inserted into the positioning hole (LH) as required, for example, wiring can be bundled with the cable tie.

[0011] In the present invention, a base frame (1) is provided at the bottom (foundation), and if a notch (1A) is formed in the base frame (1), when tightening the anchor bolts (AB) during installation of the base frame, a worker can insert his / her hand or a tool (e.g., a wrench) through the notch (1A) so as to approach the base frame (1). Compared to conventional filling devices in which no notch is provided in the base frame, the worker can insert his / her hand through the notch (1A) formed in the base frame (1) or approach or reach the location to be worked on using the tool (e.g., a wrench) he / she is using, making it easier to tighten the anchor bolt and improving workability. [Brief description of the drawings]

[0012] [Figure 1] FIG. 2 is an exploded perspective view showing each unit constituting the filling device. [Diagram 2] 2 is a perspective view showing a state in which the unit shown in FIG. 1 is assembled. [Diagram 3] FIG. 2 is a front view showing various devices housed or attached in each unit. [Figure 4] FIG. 2 is a perspective view showing the embodiment shown in FIG. [Diagram 5] FIG. 11 is an enlarged explanatory perspective view showing a mode of joining the base frame and the side unit. [Figure 6] FIG. [Figure 7] 7 is an explanatory diagram showing an enlarged view of part A in FIG. 6. [Figure 8] FIG. 2 is a perspective view showing a pressure relief valve used in the embodiment. [Figure 9] 1 is a partially enlarged view showing a sensing part and a movable part of a limit switch of a pressure release valve, showing a state in which the sensing part and the movable part are in contact with each other. FIG. [Figure 10] FIG. 10 is a partially enlarged view similar to FIG. 9, showing the sensing portion and the movable portion separated from each other. [Figure 11] 10A and 10B are explanatory diagrams showing the operation and effect of a state in which a sensing unit and a movable unit are in contact with each other in an embodiment. [Figure 12] FIG. 13 is a perspective view showing a spacer used in the limit switch of the pressure release valve. [Figure 13] 10 is a front view showing a state in which the IR box is housed in the intermediate box in the embodiment. FIG. [Figure 14] 14 is a front view showing a state in which the IR box is pulled out and held from the state shown in FIG. 13. FIG. [Figure 15] FIG. 2 is a perspective view of a harness safety joint used in the embodiment. [Figure 16] 16 is a longitudinal cross-sectional view of the harness safety joint of FIG. 15. [Figure 17] 17 is a longitudinal sectional view similar to FIG. 16, showing the harness safety coupling in a separated state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In Figure 1, the filling device 100 is composed of a lower unit 10, a middle unit 20, a top unit 30 (top unit), and side units 40 (side units) on both sides, and each unit contains the equipment necessary for filling hydrogen, etc. The middle unit 20 is located above the lower unit 10, and the top unit 30 is located above the middle unit 20. Side units 40 are located on both sides of the lower unit 10 and the middle unit 20, and the base frame 1 is located below the lower unit 10. In FIG. 1, the intermediate unit 20 is omitted from the illustration, and is indicated by a dashed leading line and the reference numeral 20. 1 shows the lower unit 10, the middle unit 20, the top unit 30, and the side units 40 on both sides in a state before they are assembled (or fastened to each other). FIG. 2 shows the lower unit 10, the middle unit 20, the top unit 30, and the side units 40 on both sides in an assembled state. 2, the display panel 21 is attached to the front surface of the intermediate unit 20. The panels attached to the front surface of each unit will be described later with reference to FIG.

[0014] In order to simplify the illustration, Figures 1, 2 and 6 only show the frames that constitute each unit, and various filling devices housed in or attached to each unit are omitted. Various filling devices housed or attached in each unit are shown in Fig. 3. In Fig. 3, a top unit 30 is provided with a support arm 32 for suspending and supporting, for example, a filling hose (not shown), a support arm rotation mechanism 32A, a flow meter 33 constituting a hydrogen gas flow path, a shutoff valve 34, an outlet side depressurization valve 35, piping, etc. The side unit 40 is provided with, for example, a filling hose connected to a filling nozzle (not shown), and in FIG. 3, the filling nozzle and the filling hose (in the illustrated embodiment, two filling nozzles and filling hoses connected thereto) are housed in the side unit 40. The lower unit 10 is provided with, for example, a flow control valve 12, a gas pipeline cooling section (including a heat exchanger 13, piping, etc.), an inlet side depressurization valve 14, etc., and these devices form a hydrogen gas flow path. Below the lower unit 10, a base frame 1 is disposed. 3 shows only the display panel 21 attached to the front surface of the intermediate unit 20. Although not shown, a filling amount display (counter) and electronic devices required therefor are provided in the intermediate unit 20.

[0015] In the illustrated embodiment, each of the units (lower unit 10, middle unit 20, top unit 30, side unit 40) shown in Figures 1 and 2 is configured as a so-called "sub-assembly." In the illustrated embodiment, various filling devices are arranged and attached at predetermined positions in each unit, and then the units are joined (assembled) to manufacture the gas filling device 100. Therefore, the various devices necessary for hydrogen filling can be arranged in each unit before assembling the units (lower unit 10, middle unit 20, top unit 30, side unit 40). Compared to the task of arranging and fixing the various devices inside the assembled gas filling device 100, the task of fixing the various devices for hydrogen filling to each individual unit is easy, and the ease of the task improves work efficiency. In addition, the labor required for assembly is reduced. However, in the illustrated embodiment, depending on the conditions of the installation location of the gas filling device 100, it is also possible to assemble each unit (lower unit 10, middle unit 20, top unit 30, side unit 40) at a stage before attaching the various filling equipment, and then install the various equipment within each assembled unit (within the frame).

[0016] 4, which shows the state in which the various panels provided in each unit of the gas filling device 100 are open, each unit is provided with a panel. That is, the intermediate unit 20 is provided with a display panel 21 (front panel), The top unit 30 is provided with a front upper panel 31. A front side lower panel 41 is provided at the bottom of the side unit 40, and a front side upper panel 42 is provided at the top of the side unit 40. A front lower panel is provided on the lower unit 10. To avoid complicating the drawings, the front lower panel is not shown. In FIG. 4, the display panel 21, the front side lower panel 41, and the front side upper panel 42 are open in the lateral direction, and the front upper panel 31 is open upward. In FIG. 4, reference numeral 32 denotes a support arm for supporting the operation of the filling nozzle and the filling hose, and reference numeral 36 denotes an explosion door as a safety device. In the illustrated embodiment, the front side is the side where the counter (display unit, filling amount indicator) is attached. For example, in a filling device that can fill a vehicle from both sides, the counter (display unit, filling amount indicator) is attached to both sides, and both sides are considered to be the front.

[0017] Although not clearly shown, in the illustrated embodiment, there are no welded parts between the units in the gas filling device 100. Panels that have conventionally been fixed by welding are now attached with an adhesive. If the panel is fixed to the unit by welding, the weld marks will be noticeable even after the panel is attached, making it look bad. Also, if the panel is ground with a sander to remove the weld marks, the plated coating will also be removed, reducing corrosion resistance. In the illustrated embodiment, there are no welds, and since the panel is glued to the unit, there are no weld marks, which gives a good appearance. In addition to the design effect, the work of grinding off the weld marks with a sander is also eliminated. Furthermore, since the plating film is not removed by grinding away the weld marks, the corrosion resistance is not reduced. In addition, since there are no welded parts, there are no unevenness, and the sides on which the corresponding panels of each unit (display panel 21, front upper panel 31, front side lower panel 41, front side upper panel 42) are provided are flush, improving the appearance of the panels.

[0018] 1 and 2 again, many positioning holes LH are drilled (formed) in the frame of each unit. The positioning holes LH can be formed to correspond to the joining points (overlapping points) between units and the joining points of each unit with equipment. In order to avoid complexity, in Fig. 1, only some of the positioning holes LH are shown with leading lines. By processing the positioning holes LH, when installing various filling devices in each unit or when assembling units with various devices installed, it is possible to easily determine the equipment installation locations and the joint locations of units. Then, bolts, which are fastening members, are inserted into the positioning holes LH at the equipment installation locations and the joint locations of units. In other words, since the joining work is performed by inserting the bolts into the positioning holes LH, the equipment installation work and the assembly work of units are easy and the workability is good. In addition, the equipment installation locations and the joints between units can be easily and reliably determined, and the relative positions of the equipment can be accurately determined, so the relative positions of heavy equipment such as the gas pipeline cooling section (including heat exchanger 13, piping, etc.) and equipment connected via piping can be accurately specified by the positioning holes LH. Therefore, even an unskilled person can accurately connect the primary and secondary piping without damaging (scratching) the metal seal between the gas pipeline cooling section. This makes it possible to prevent hydrogen gas leakage due to damage to the metal seal. An example of a specific embodiment in which the positioning holes LH in the frame of each unit are used to couple the units together and connect each unit to a device will be described later with reference to FIG.

[0019] FIG. 5 shows a mode in which the base frame 1 arranged below the lower unit 10 (FIGS. 1 to 3) and the side unit 40 are joined near their lower ends. In Fig. 5, a notch 1A is formed near the right end of the base frame 1, and the notch 1A is formed in a front surface 1F of the base frame 1. Although not shown in Fig. 5, the notch 1A is formed near both the left and right ends of the base frame 1. A positioning hole LH1 is formed on the side of the side unit 40 in the base frame 1 (upper right side in FIG. 5), and a positioning hole LH40 is formed in the side unit 40 at a position corresponding to the positioning hole LH1. Although shown offset in FIG. 5, the positioning holes LH1 and LH40 are formed at positions that align (overlap) when the base frame 1 and the side unit 40 are joined, and a single locating pin LP can be inserted into the positioning holes LH1 and LH40. The positioning holes LH1 and LH40 are used as positioning holes into which the locating pins LP are inserted for temporary fastening. Then, after temporary fastening with the locating pins LP, the fastening hole LH2 and the fastening hole LH41 on the side unit 40 side are used as holes into which a fastening bolt is inserted for fastening. In other words, the base frame 1 and the side unit 40 are each formed with the positioning holes LH1 and LH40 into which the locating pins LP are inserted for positioning (temporarily fastening), and the fastening holes LH2 and LH41 into which a fastening bolt is inserted for fastening after positioning.

[0020] When connecting (assembling) the base frame 1 and the side unit 40, the locating pin LP is inserted into the positioning hole LH1 on the base frame 1 side via the notch 1A, and then passed through the positioning hole LH40 on the frame side of the side unit 40 to temporarily fasten the base frame 1 and the side unit 40 together. Then, with the locating pins LP temporarily fastening the units, bolts (not shown) for fastening the units together are inserted into the fastening holes LH2 on the base frame 1 side and LH41 on the side unit 40 side, and the base frame 1 and the side unit 40 (their frames) are joined (fastened) together using nuts (not shown). After the base frame 1 and the side unit 40 are fastened together with the bolts and nuts, the locating pins LP inserted into the positioning holes LH1 and LH40 are removed. If the units are connected (assembled) with bolts and nuts from the beginning, assembly errors will accumulate, and the accumulated errors (deviations) will become large in later stages of the assembly process, making it impossible to connect the bolts and nuts. In contrast, as in the illustrated embodiment, if the locating pins LP (for example, the base frame 1 and the side unit 40) are temporarily fastened (temporarily assembled) at a stage before the units are connected (for example, the base frame 1 and the side unit 40 are bolted together), the accumulated errors will not become large even in later stages of the assembly work, and the connection (fastening or assembly) with bolts and nuts can be easily and smoothly performed. This also reduces distortion of the frame structure.

[0021] 5 illustrates the connection (assembly) of the base frame 1 and the side unit 40, i.e., the connection of units, but the same method as described above can be applied to the connection (assembly) of a unit and equipment to be installed in that unit. For example, as described above, when connecting and fixing a heavy gas pipe cooling section (including heat exchanger 13, piping, etc., see FIG. 3) to the lower unit 10, if it is first temporarily fixed or temporarily assembled with locating pins and then fastened with bolts and nuts, the error in installing the equipment will not be large, and it will be possible to install it easily and accurately. Although not shown in the figure, by inserting a cable tie into the positioning hole after assembly, it is possible to bundle and arrange the wires, for example.

[0022] Next, the installation work of the base frame 1 will be described with reference to FIGS. 6, a notch 1A is formed in the base frame 1 at the bottom (foundation) of the gas filling device 100. The notch 1A in FIG. 6 is the notch 1A described in FIG. When the gas filling device 100 is installed at a predetermined position (installation position) in a hydrogen station, the base frame 1 is fixed (installed) at the installation position in the station by the anchor bolts AB. When fixing the base frame 1 at the installation position by the anchor bolts AB, the anchor bolts AB need to be tightened by a wrench WR (tool), but tightening the anchor bolts AB has traditionally been difficult. In the conventional base frame 1, the front portion 1F extending in the vertical direction on the front side of the base frame 1 was made of a flat member (the front portion 1F in the conventional gas filling device had no notch 1A), so that the bolt heads of the anchor bolts AB may be difficult to see from the front portion 1A by the worker, and it is difficult to tighten the bolt heads of the anchor bolts AB beyond the front portion 1F with the wrench WR.

[0023] In contrast, in the illustrated embodiment, as described above, the notch 1A is formed in the front surface portion 1F on the front side (viewer side in FIG. 6) of the base frame 1, thereby solving the above problem. FIG. 7 shows, in addition to the above-mentioned tightening operation of the anchor bolts AB, also an aspect of the operation of temporarily fastening the base frame 1 and the side unit 40 by the locating pins LP described mainly with reference to FIG. 6 and 7, the notches 1A are formed near both ends of the base frame 1 in the left-right direction in Fig. 6. That is, in the illustrated embodiment, the work of assembling (fastening) the base frame 1 and the side unit 40, and the work of fixing (installing) the base frame 1 at a predetermined position in the station with the anchor bolts AB can be performed near both the left and right ends of the base frame 1.

[0024] The pressure relief valve 14 (inlet side pressure relief valve: see FIG. 3) and its switch unit 15 in the illustrated embodiment will be described with reference to FIGS. 8 shows the depressurization valve 14 and its switch unit 15 used in the illustrated embodiment, with the switch unit 15 disposed on the top of the main body unit 14A of the depressurization valve 14. The switch unit 15 has a main body unit 15A and a sensing unit 15B, and a cable 16 is connected to the main body unit 15A. Fig. 9 is a partial enlarged view of area A8 indicated by a dashed circle in Fig. 8. In Fig. 9, when the depressurization valve 14 is activated, the movable part 14B rises and comes into contact with the sensing part 15B, and a signal confirming that the depressurization valve 14 has been activated is output from the main body part 15A of the switch part 15 via the cable 16. On the other hand, as shown in Fig. 10, which is an enlarged view of area A8 in Fig. 8, if the movable part 14B of the depressurization valve 14 does not rise and does not come into contact with the sensing part 15B, the depressurization valve 14 will not be activated. Therefore, the switch part 15 outputs the operating status of the depressurization valve 14 as a signal. 9 and 10, reference numeral 17 denotes a mounting screw portion for mounting the main body portion 15A to a bracket 18.

[0025] In FIG. 8, if the cable 16 moves in the direction of the arrow A8-1, for example, the connected main body 15A will also swing, which may cause the switch base to malfunction or the mounting screw portion 17 (FIGS. 9 and 10) to become loose. In contrast, in the illustrated embodiment, as shown in FIG. 11 , the switch portion 15 is attached to the top of the depressurization valve main body 14A via a bracket 18, which is an elastic, L-shaped sheet metal member fastened to the main body portion 15A by fastening members 19.

[0026] Furthermore, by fixing the cable 16 to the mounting bracket 18 attached to the top of the main body portion 15A, malfunction of the switch portion 15 (switch base) can be prevented even if the cable 16 fluctuates violently, and the mounting screw portion 17 will not loosen.

[0027] In Fig. 12, a spacer 23, for example 5 mm thick, is attached to the mounting bracket 18 via a flexible member 24 (string, chain, etc.) to position the sensing portion 15B of the switch portion 15. The thickness (for example 5 mm) of the spacer 23 is set to be the same as the stroke of the movable portion 14B that moves in the vertical direction. When assembling the switch portion 15, it is necessary to adjust the stroke of the movable portion 14B. When adjusting the stroke of the movable portion 14B, if the spacer 23 is used, the stroke can be easily adjusted, and the arrangement and relative positional relationship of various parts can be easily and accurately adjusted. In the illustrated embodiment, the spacer 23 is attached to the mounting bracket 18 via the flexible member 24, so that when the stroke of the movable part 14B needs to be adjusted, the adjustment can be made immediately using the spacer 23. Therefore, not only during assembly but also during various maintenance and inspections of the filling device, the worker does not need to carry around the spacer 23 and can perform the necessary work without having to go through the trouble of searching for the spacer 23. This improves work efficiency.

[0028] An infrared box (IR box) for communication filling in the illustrated embodiment will be described with reference to Figs. The IR box (infrared box) is not a device that is handled by workers during normal filling operations, but for example, when performing maintenance work such as updating programs or inspecting and wiring cables (e.g., wiring work), the IR box is opened to perform the work. The frequency of work that requires opening the IR box is low. In the illustrated embodiment, under normal circumstances (when no operation to open the IR box is performed), the IR box 25 is stored in the space above the intermediate unit 20 (see FIGS. 1 to 3) as shown in Fig. 13. The IR box 25 has a rectangular parallelepiped shape with a predetermined thickness. In Fig. 13, the IR box 25 is stored in the space in the upper left corner of the intermediate unit 20 so that its longitudinal direction is perpendicular to the paper surface of Fig. 13 when in a stored state. When performing work that requires opening the IR box 25, such as maintenance work (which is rare), the IR box 25 is pulled out from the space in the upper left corner of the intermediate unit 20 and positioned on the operator's side (the front side: the viewer's side or the front side in FIG. 14) as shown in FIG. 14. In FIG. 14, the main body of the pulled-out IR box 25 is shown with hatching. When the IR box 25 is pulled out, a pin 26 or bolt protruding from a frame (not shown) in the intermediate unit 20 is inserted into an oval hole 25B in a hook fitting 25A at the rear edge of the IR box 25, thereby holding the hook fitting 25A at the rear edge of the IR box 25 facing upward. Here, the oval hole 25B and the pin 26 (or bolt) are provided in two places on the left and right in Figures 13 and 14. As shown in FIG. 14, when IR box 25 is pulled out and held with the working surface of IR box 25 facing the operator, various tasks that require IR box 25 to be opened (program updates, wiring work such as inspecting and wiring cables, and other maintenance work) can be easily performed because the inside of IR box 25 is exposed to the operator.

[0029] In the illustrated embodiment, a harness extends along a filling hose (not shown) to transmit signals during communicative filling. A harness safety joint 43 of such a harness will be described with reference to Figs. 15 to 17. In Figures 15 to 17, harness safety joint 43 has a harness 44 on the gas filling device (not shown) side, a harness 45 on the vehicle (not shown) side, and a main body 46, and is configured so that harness 44 on the filling device side and harness 45 on the vehicle side can be separated. The main body 46 has a connection portion 46A that connects the filling device side harness 44 and the vehicle side harness 45, a filling device side flange portion 46B, and a vehicle side flange portion 46C. A pressing protrusion 46AP is provided on the connection portion 46A of the main body 46, and when the pressing protrusion 46AP is pressed, the vehicle side harness 45 and the connection portion 46A are separated, so that the filling device side harness 44 and the vehicle side harness 45 are separated. As shown in FIG. 16, the harness through-hole 46CH in the vehicle-side flange portion 46C is formed so that the inner wall shape thereof becomes gradually smaller in inner diameter going downward in FIG.

[0030] For example, when the safety joint 43 is pulled toward the vehicle side, such as when a vehicle (not shown) suddenly starts moving regardless of the intention of the worker or driver performing the gas filling operation, the harnesses 44, 45 and the main body 46 move downward in Figs. 15 to 17 (in the direction of the arrow A17 in Fig. 17). As described above with reference to Fig. 16, the inner diameter of the harness through hole 46CH in the flange portion 46C smoothly decreases toward the downward direction (in the direction of the arrow A17). Therefore, as shown in Fig. 17, the pressing protrusion 46AP of the connection portion 46A is pressed by the inner wall surface of the through hole 46CH in the flange portion 46C. As a result, as shown in Fig. 17, the harness 45 on the vehicle side and the connection portion 46A are separated, and the harness safety joint 43 is separated.

[0031] It should be noted that the illustrated embodiment is merely an example and is not intended to limit the technical scope of the present invention. [Explanation of symbols]

[0032] 1. Base frame 1A...Notch 10 Lower unit 13...heat exchanger 20. Intermediate unit 30... Top unit 33...flow meter 40...Side unit 100 Gas filling device LH... Positioning hole LP··· pin (locate pin)

Claims

1. a lower unit that houses a heat exchanger on a base frame; an intermediate unit located above the lower unit and equipped with a display; a top unit located above the intermediate unit and housing a flow meter; a side unit located on both sides of the lower unit and the intermediate unit and housing a filling hose having a filling nozzle at its tip; A gas filling device comprising: a positioning hole formed in each of said units at a position where the units overlap; and a locating pin inserted into said positioning hole.

2. 2. The gas filling device according to claim 1, wherein the positioning hole is configured so that the locating pin can be removed.

3. 3. The gas filling device according to claim 1, further comprising a base frame provided at the bottom, the base frame having a notch formed therein.

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