JP2006035891A - Fuel container holding device for natural gas vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely prevent an axial rotational slip of a fuel container from occurring. <P>SOLUTION: This holding device is used for holding the fuel container 10 on the car body frame 9 of a natural gas vehicle. The holding device is provided with rotation regulating means 21, 32 and 33 for regulating the rotation of the fuel container 10 by fixing the neck section 12 of the fuel container 10 to the car body frame 9. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a holding device for holding a fuel container in which natural gas is stored in a vehicle body frame of a vehicle that drives an engine using natural gas as fuel.

  In recent years, vehicles that drive engines using natural gas as fuel (hereinafter referred to as natural gas vehicles) have come into practical use. Natural gas to be fuel is stored in a fuel container. The fuel container is held on the body frame of the natural gas vehicle by, for example, a fuel container holding device as shown in FIG. Reference numeral 80 in FIG. 8 denotes a side member that forms a ladder-like body frame together with a cross member (not shown).

  As shown in FIG. 8, the fuel container 81 includes a cylindrical body portion 82 and a neck portion 84 provided at one end of the body portion 82 and fitted with a container main valve 83. Both end portions 82a and 82b of the body portion 82 are formed in a hemispherical shape. The fuel container 81 has a neck portion 84 disposed on the front side of the vehicle in a state where the body portion 82 is disposed along the longitudinal direction of the side member 80.

  The fuel container holding device includes front and rear vehicle body mounting brackets 85 and 86 that are attached to the side member 80 and are provided at intervals in the vehicle front-rear direction. The fuel container 81 is fastened to the front and rear vehicle body mounting brackets 85 and 86 by a fixing band 87. As a result, the fuel container 81 is held by the side member 80.

  In addition, the conventional fuel container holding device has circular openings 88a and 89a that can receive the tops of both end portions 82a and 82b of the fuel container 81 in order to prevent the fuel container 81 from moving in the vehicle longitudinal direction. The front stopper 88 and the rear stopper 89 are pressed and fixed to both end portions 82 a and 82 b of the fuel container 81. The front stopper 88 is attached to the front vehicle body mounting bracket 85 via two front rods 90. The rear stopper 89 is attached to the rear vehicle body mounting bracket 86 via two rear rods 91. A front / rear rod 92 is attached between the front stopper 88 and the rear stopper 89.

JP 2002-120573 A

  However, in the above-described configuration, the front stopper 88 and the rear stopper 89 only prevent the movement of the fuel container 81 in the vehicle front-rear direction, and the rotation deviation around the axis of the fuel container 81 could not be restricted. . That is, in the above-described configuration, the rotational deviation around the axis of the fuel container 81 is restricted only by tightening with the fixing belt 87. Therefore, there is a possibility that the fuel container 81 may be rotated around the axis due to long-term use or loosening of the fixing belt 87.

  In the above-described configuration, in order to prevent the fuel container 81 from moving in the vehicle longitudinal direction, the front stopper 88, the rear stopper 89, and the front rod 90, the rear rod 91, and the front and rear for supporting them. Since the rod 92 is provided, the number of parts is large. Further, since the front stopper 88 and the rear stopper 89 are pressed against both end portions 82a and 82b having relatively low dimensional accuracy in the fuel container 81, the positions of the front stopper 88 and the rear stopper 89 are difficult to be determined. Was troublesome.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a fuel container holding device for a natural gas vehicle that can reliably prevent a rotational deviation around the axis of the fuel container.

  Another object of the present invention is to provide a fuel container holding device that has a relatively small number of parts and is easy to assemble.

  In order to achieve the above object, the invention of claim 1 is a holding device for holding a fuel container in a body frame of a natural gas vehicle, wherein a neck portion of the fuel container is fixed to the body frame, A fuel container holding device for a natural gas vehicle, comprising a rotation restricting means for restricting the rotation of the fuel container.

  The invention of claim 2 is attached to a vehicle body frame of a natural gas vehicle, and is provided with a body holding member for holding the body of the fuel container, and supported by the body holding member, and is associated with the neck of the fuel container. A fuel container holding device for a natural gas vehicle, comprising: an engaging member for joining together; and a fixing member for fixing the neck portion of the fuel container to the engaging member.

  According to a third aspect of the present invention, the engagement member has a fitting hole, and the neck portion of the fuel container is fitted into the fitting hole, so that the engagement member becomes the neck portion of the fuel container. A fuel container holding device for a natural gas vehicle according to claim 2, wherein the fuel container holding device is engaged with the fuel container holding device.

  According to a fourth aspect of the present invention, the neck portion of the fuel container includes a flange portion that is fixed to the body portion of the fuel container, and a male screw portion that has a smaller diameter than the flange portion and protrudes from the flange portion, The fuel container is formed by tightening the nut to the male screw portion in a state where the fixing member is a nut screwed to the male screw portion and the male screw portion is fitted in the fitting hole. The fuel container holding device for a natural gas vehicle according to claim 3, wherein the neck portion is fixed to the engagement member.

  According to a fifth aspect of the present invention, the neck portion of the fuel container has a flange portion fixed to the body portion of the fuel container, a projecting portion having a smaller diameter than the flange portion and projecting from the flange portion, and the flange portion. The fixing member is a bolt screwed into the screw hole, the engagement member has a bolt insertion hole through which the bolt is inserted, and the protrusion is 4. The neck portion of the fuel container is fixed to the engagement member by inserting the bolt into the bolt insertion hole and tightening the bolt into the screw hole while being fitted in the fitting hole. It is a fuel container holding | maintenance apparatus of the described natural gas vehicle.

  According to a sixth aspect of the present invention, the neck portion of the fuel container includes a flange portion that is fixed to the body portion of the fuel container, a projecting portion that is smaller in diameter than the flange portion and projects from the flange portion, and the flange portion. A stud bolt projecting, the fixing member comprising a nut screwed into the stud bolt, the engagement member having a bolt insertion hole through which the stud bolt is inserted, and the projecting portion being The neck portion of the fuel container is fixed to the engagement member by tightening the nut to the stud bolt in a state where the stud bolt is fitted into the fitting hole and the stud bolt is inserted into the bolt insertion hole. Item 4. A fuel container holding device for a natural gas vehicle according to Item 3.

  According to the present invention, it is possible to reliably prevent the rotational deviation around the axis of the fuel container, and to provide a fuel container holding device that has a relatively small number of parts and can be easily assembled. Play.

  A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view of a fuel container holding device according to an embodiment of the present invention, showing a state in which the fuel container is held. FIG. 2 is a view taken in the direction of arrow II in FIG. 1 and shows a state in which the fuel container is omitted and a cover mounting member is installed. FIG. 3 is an exploded perspective view showing an attached state of the fuel container.

  The fuel container holding device of the present embodiment is a vehicle that drives an engine using natural gas as fuel, and in particular, natural gas serving as fuel is stored in a ladder-like body frame of a large natural gas vehicle such as a truck. A holding device for holding the fuel container.

  As shown in FIG. 1, the fuel container holding device according to the present embodiment is attached along the longitudinal direction of a side member 9 that forms a ladder-like body frame together with a cross member (not shown). The container 10 is held. The longitudinal direction of the side member 9 coincides with the front-rear direction of the natural gas vehicle.

  As shown in FIGS. 1 and 3, the fuel container 10 according to the present embodiment includes a cylindrical body portion 11 and a neck portion 12 provided at one end of the body portion 11. Both end portions 11a and 11b of the body portion 11 are formed in a hemispherical shape. The fuel container 10 has a neck portion 12 disposed on the front side of the vehicle in a state where the body portion 11 is disposed along the longitudinal direction of the side member 9.

  The neck portion 12 includes a flange portion 15 fixed to the body portion 11, a protrusion portion 16 having a smaller diameter than the flange portion 15 and protruding from the flange portion 15, and a male screw portion 17 provided on the outer peripheral surface of the protrusion portion 16. The screw portion 18 is provided on the inner peripheral surface of the protruding portion 16. The flange portion 15 and the protruding portion 16 are provided coaxially.

  When the fuel container 10 is transported or stored, a protector or a cover (both not shown) is screwed or attached to the male thread portion 17 of the neck portion 12. A container main valve 20 for connecting a fuel pipe 19 connected to a fuel supply device and a gas filling port (both not shown) is screwed onto the female screw portion 18 of the neck portion 12. The container original valve 20 incorporates an overflow prevention valve and a safety valve.

  The type of the fuel container 10 may be any. For example, a metal container, an aluminum liner composite container reinforced with a fiber reinforced plastic, and a plastic liner composite container (all composite container) reinforced with a fiber reinforced plastic. The natural gas stored in the fuel container 10 may be any. For example, compressed natural gas (CNG) stored at high pressure as a gas, liquefied natural gas (LNG: Liquefied Natural Gas) stored in a fuel container as a cryogenic container in a liquid state, and a fuel container It is an adsorbed natural gas (ANG) that is adsorbed and stored in an adsorbent material.

  As shown in FIGS. 1 to 3, the fuel container holding device of the present embodiment is attached to a side member 9 of a natural gas vehicle, and includes a body holding member 21 for holding the body 11 of the fuel container 10. I have. The body holding member 21 is attached to the side member 9, and the front and rear vehicle body mounting brackets 22 and 23 provided at intervals in the vehicle front-rear direction, and the body 11 of the fuel container 10 are connected to the vehicle body mounting brackets 22 and 23. And a fixing belt 24 for fastening to the belt.

  The front and rear body mounting brackets 22 and 23 are connected to each other by a connection bracket 25. The individual vehicle body mounting brackets 22 and 23 are formed in an L shape with vertical portions 22a and 23a extending in the vehicle height direction and horizontal portions 22b and 23b extending outward in the vehicle width direction. Inclined portions 22c and 23c for reinforcement are provided between the vertical portions 22a and 23a and the horizontal portions 22b and 23b.

  At upper end portions of the vertical portions 22a and 23a of the vehicle body mounting brackets 22 and 23, claw portions (see reference numeral 22d in FIG. 3) for engagement with one end of the fixing belt 24 are provided. Holes (see reference numeral 22e in FIG. 3) for engagement with the other end of the fixing belt 24 are provided at the front ends of the horizontal portions 22b and 23b of the vehicle body mounting brackets 22 and 23. A plurality of holes 22f and 22g for attaching an engaging member 32 to be described later are provided in the vertical portion 22a and the horizontal portion 22b of the front body mounting bracket 22, respectively. In the present embodiment, the holes 22f and 22g are screw holes.

  The fixing belt 24 is provided at the belt main body 24a, one end of the belt main body 24a, the metal fitting 24b that engages with the claw portions (22d) of the vertical portions 22a and 23a, and the other end of the belt main body 24a. It is comprised from the volt | bolt 24c penetrated and engaged with the hole (22e) of said horizontal part 22b, 23b.

  As shown in FIG. 2, the fuel container holding device of the present embodiment includes a cover attachment member 27 for attaching a cover (not shown) that covers the fuel container 10. The cover attachment member 27 includes front and rear cover attachment brackets 28 that are attached to the upper end portions of the vertical portions 22a and 23a of the vehicle body attachment brackets 22 and 23 and extend outward in the vehicle width direction. A cover frame 29 extending in the vehicle front-rear direction, which is slightly longer than the entire length of the fuel container 10, is attached to the front and rear cover mounting brackets 28. A front cover 30a and a rear cover 30b that constitute the front and rear portions of the cover are attached to the front and rear ends of the cover frame 29, respectively. The front cover 30a and the rear cover 30b are connected to lower end portions of the vertical portions 22a and 23a of the vehicle body mounting brackets 22 and 23 via a cover mounting bracket 31 extending in the vehicle front-rear direction.

  As shown in FIGS. 1 to 3, the fuel container holding device of the present embodiment includes an engagement member 32 that is supported by the trunk portion holding member 21 and engages with the neck portion 12 of the fuel container 10, and the fuel container. A fixing member for fixing the ten neck portions 12 to the engaging member 32.

  The engagement member 32 of the present embodiment includes a plate portion 36 having a fitting hole 35 into which the neck portion 12 of the fuel container 10 is fitted, a vehicle front-rear direction, and one end attached to the plate portion 36. The other end is provided with an extension part 37 attached to the front body mounting bracket 22.

  Preferably, a plurality of extending portions 37 are provided in the present embodiment, and the plate portion 36 is supported by the front body bracket 22 through the two extending portions 37. The extending portion 37 according to the present embodiment includes a rod 37a and fixtures 37b and 37c provided at both ends of the rod 37a. One mounting tool 37b is provided with a plurality of holes 37d for mounting the plate portion 36. The hole 37d in the present embodiment is a screw hole. The other attachment 37c is provided with a plurality of holes 37e for attachment to the vehicle body attachment bracket 22 on the front side. The hole 37e of the present embodiment is a bolt insertion hole through which the bolt 41 is inserted.

  As shown in FIG. 4, the plate portion 36 of the engagement member 32 of the present embodiment has a fitting hole 35 for fitting the neck portion 12 of the fuel container 10. The plate portion 36 is configured to join the front and rear plates 38 and 39 to form a box structure (closed section). This is to prevent the forward movement of the fuel container 10 as much as possible when the vehicle collides forward, and to ensure a sufficient strength to restrict the rotational deviation around the axis of the fuel container 10. The rear plate 39 is provided with a fitting hole 35, which is set slightly larger than the outer diameter of the male thread portion 17 (projecting portion 16) of the neck portion 12 of the fuel container 10 and smaller than the outer diameter of the flange portion 15. The flange portion 15 can be seated or brought into surface contact with the plate portion 36 in a state where the screw portion 17 is fitted in the fitting hole 35. The fitting hole 35 is formed in a circular shape having the same shape as the neck portion 12 of the fuel container 10. Since the plate portion 36 (plate 39) and the flange portion 15 are in surface contact, the neck portion 12 of the fuel container 10 can be stably fixed to the engaging member 32.

  The front plate 38 is provided with an opening 34 larger than the fitting hole 35 of the rear plate 39. The opening 34 is sized so that a nut 33 to be described later does not interfere, and is formed in a rectangular shape in the present embodiment.

  Each plate 38, 39 is provided with a plurality of holes 38a, 39a for attaching the extending portion 37 of the engaging member 32. The holes 38a and 39a in the present embodiment are bolt insertion holes through which the bolts 42 are inserted.

  As shown in FIG. 3, the fixing member of the present embodiment includes a nut 33 that is screwed into the male thread portion 17 of the neck portion 12 of the fuel container 10. The nut 33 is formed in a ring shape. On the inner peripheral surface of the nut 33, a female screw portion 33a that is screwed into the male screw portion 17 of the neck portion 12 is provided. The front end face of the nut 33 is provided with a plurality of holes 33b for fitting a special tool for tightening and loosening the nut 33. However, the form of the nut 33 is not limited to this, and, for example, a nut whose outer diameter portion is a hexagonal shape can also be used.

  An example of the assembly procedure of the fuel container holding device of the present embodiment will be described with reference to FIG.

  First, the front vehicle body mounting bracket 22 and the rear vehicle body mounting bracket 23 are attached to the side member 9, and these are connected by the connection bracket 25. Next, the bolt 41 (see FIG. 1) is inserted into the hole 37e of the extending portion 37 of the engaging member 32 and tightened into the holes 22f and 22g of the front body mounting bracket 22 to The end is attached to the front body mounting bracket 22. Next, the bolt 42 (see FIG. 1) is inserted into the hole 38a (39a) of the plate portion 36 of the engaging member 32 and tightened into the hole 37d of the extension portion 37, so that the plate portion 36 is connected to the extension portion. Attach to 37 front end.

  Next, the trunk portion 11 of the fuel container 10 is placed on the horizontal portions 22 b and 23 b of the front and rear vehicle body mounting brackets 22 and 23, and the weight of the fuel container 10 is supported by the trunk portion holding member 21. Then, the fuel container 10 is shifted and moved toward the plate part 36 (forward), and the male thread part 17 of the neck part 12 of the fuel container 10 is fitted into the fitting hole 35 of the engaging member 32. As a result, the neck portion 12 of the fuel container 10 is engaged with the plate portion 36 of the engagement member 32.

  At this time, the fuel container 10 is moved in the front-rear direction by shifting the fuel container 10 toward the plate part 36 until the front end face of the flange part 15 of the neck part 12 of the fuel container 10 contacts the plate part 36. Positioned.

  Next, the nut 33 is fastened to the male thread portion 17 of the neck portion 12 of the fuel container 10 protruding from the fitting hole 35, and the engagement member is formed by the flange portion 15 of the neck portion 12 of the fuel container 10 and the nut 33. The neck portion 12 of the fuel container 10 is fixed to the plate portion 36 of the engaging member 32 by sandwiching the 32 plate portions 36.

  Next, the metal fitting 24b of the fixing belt 24 is engaged with the claw portions (22d) of the front and rear vehicle body mounting brackets 22 and 23, and the bolt 24c of the fixing belt 24 is connected to the horizontal portion of the front and rear vehicle body mounting brackets 22 and 23. The nut 40 is tightened to the bolt 24c of the fixing belt 24 through the holes (22e) of 22b and 23b. Thus, the body 11 of the fuel container 10 is fastened by the fixing belt 24 and held by the front and rear vehicle body mounting brackets 22 and 23.

  Next, the cover attaching member 27 and the cover are attached. Thereby, the holding of the fuel container 10 to the apparatus, the assembly of the apparatus, and the attachment to the vehicle body frame are completed.

  Note that the fuel container holding device may be attached to the side member 9 in a state where the fuel container holding device and the fuel container 10 are integrated (modularized) in advance.

  The fuel container holding device according to the present embodiment includes a rotation restricting means for fixing the neck portion 12 of the fuel container 10 to the vehicle body frame and restricting the rotational deviation around the axis of the fuel container 10. In the present embodiment, the body holding member 21, the engaging member 32, and the fixing member (nut 33) constitute the above rotation restricting means. That is, according to the present embodiment, the neck portion 12 of the fuel container 10 is fixed to the side member 9 via the engaging member 32 and the trunk portion holding member 21, so that the fixing belt 24 should be used. Even if loosening occurs, the rotational deviation around the axis of the fuel container 10 can be reliably prevented.

  Also, when the vehicle collides forward and the fuel container 10 tries to move forward due to inertial force, or when the fixing belt 24 is loosened and the fuel container 10 tries to move forward, Since the neck portion 12 of the fuel container 10 contacts the plate portion 36 of the engaging member 32, the forward movement of the flange portion 15 of the fuel container 10 is prevented.

  In addition, even if the fixing belt 24 is loosened and the fuel container 10 tries to move backward, the neck portion 12 of the fuel container 10 is fixed to the engaging member 32 by the fixing member 33. The fuel container 10 does not move backward.

  That is, according to the present embodiment, the front engagement member 32 and the fixing member 33 prevent the fuel container 10 from moving (displacement) in the vehicle longitudinal direction. Therefore, in the conventional fuel container holding device shown in FIG. 8, the rear stopper 89 and the rear rod 91 and the front / rear rod 92 for supporting the rear stopper 89, which are necessary to prevent the movement in the vehicle rearward direction. Can be omitted, and the number of parts can be reduced as compared with the prior art.

  Further, according to the present embodiment, the neck portion 12 having relatively high dimensional accuracy in the fuel container 10 can be reliably held at a fixed position. Therefore, there is less position variation when the fuel pipe 19 is attached to the container main valve 20 of the fuel container 10, and assembly can be facilitated.

  The present invention is not limited to the embodiment described above.

  For example, as in another embodiment shown in FIG. 5, the neck portion 12 of the fuel container 10 has a screw hole 51 provided in the front end surface of the flange portion 15, and the fixing member is screwed into the screw hole 51. The plate portion 36 of the engaging member 32 may include a bolt insertion hole 53 through which the bolt 52 is inserted. In this case, the bolt 52 is inserted into the bolt insertion hole 53 and tightened to the screw hole 51 in a state where the protrusion 16 is fitted into the fitting hole 35, thereby engaging the neck portion 12 of the fuel container 10. Secure to member 32. In the illustrated example, two screw holes 51, two bolts 52, and two bolt insertion holes 53 are provided. However, one or three or more of these may be provided.

  Further, as in still another embodiment shown in FIG. 6, the neck portion 12 of the fuel container 10 has a stud bolt 61 that protrudes from the front end surface of the flange portion 15, and the fixing member is screwed onto the stud bolt 61. The plate portion 36 of the engaging member 32 may have a bolt insertion hole 63 through which the stud bolt 61 is inserted. In this case, the neck portion 12 of the fuel container 10 is tightened by tightening the nut 62 to the stud bolt 61 in a state where the protruding portion 16 is fitted into the fitting hole 35 and the stud bolt 61 is inserted into the bolt insertion hole 63. Fix to the engaging member 32. In the illustrated example, two stud bolts 61, two nuts 62, and two bolt insertion holes 63 are provided, but these may be provided one by one or three or more.

  Further, as shown in FIG. 7, the plate portion 36 of the engaging member 32 may be constituted by a single plate 71. In this case, the plate 71 is provided with a fitting hole 72 into which the protruding portion 16 is fitted, and a hole 73 for attaching the extending portion 37 of the engaging member 32.

  Further, the shape of the fuel container 10 is not limited to the above-described embodiment. For example, both end portions 11a and 11b of the body portion 11 or any one of them may be formed in a substantially planar shape.

  Further, the fuel container holding device may hold the fuel container along the vehicle width direction (for example, the longitudinal direction of the cross member).

  Furthermore, the vehicle to which the present invention is applied is not limited to a large vehicle such as a truck, but may be a passenger vehicle or the like.

It is a perspective view of the fuel container holding device concerning one embodiment of the present invention, and shows the state where the fuel container was held. FIG. 2 is a view taken in the direction of arrow II in FIG. 1 and shows a state in which the fuel container is omitted and a cover mounting member is installed. It is a disassembled perspective view which shows the attachment state of a fuel container. It is a disassembled perspective view of the plate part of an engaging member. It is a disassembled perspective view which shows the attachment state of the fuel container based on other embodiment. It is a disassembled perspective view which shows the attachment state of the fuel container based on further another embodiment. It is a perspective view which shows the modification of the plate part of an engaging member. It is a perspective view of the conventional fuel container holding device.

Explanation of symbols

9 Body frame (side member)
DESCRIPTION OF SYMBOLS 10 Fuel container 11 trunk | drum 12 neck part 15 flange part 16 protrusion part 17 male thread part 19 fuel piping 20 container original valve 21 trunk | drum holding member 22 vehicle body mounting bracket 23 vehicle body mounting bracket 24 fixing belt 32 engaging member 33 fixing member ( nut)
35 Fitting hole 36 Plate part 37 Extension part 51 Screw hole 52 Fixing member (bolt)
53 Bolt insertion hole 61 Stud bolt 62 Fixing member (nut)
63 Bolt insertion hole

Claims (6)

  In a holding device for holding a fuel container in a body frame of a natural gas vehicle, the fuel container includes a rotation restricting means for restricting the rotation of the fuel container by fixing the neck portion of the fuel container to the body frame. A fuel container holding device for a natural gas vehicle.   A body holding member that is attached to a body frame of a natural gas vehicle and holds the body of the fuel container, and an engagement member that is supported by the body holding member and engages with the neck of the fuel container And a fuel container holding device for a natural gas vehicle, comprising: a fixing member for fixing a neck portion of the fuel container to the engaging member.   The engagement member has a fitting hole, and the engagement member engages with the neck portion of the fuel container by fitting the neck portion of the fuel container into the fitting hole. A fuel container holding device for a natural gas vehicle as described.   The neck portion of the fuel container has a flange portion that is fixed to the body portion of the fuel container, and a male screw portion that is smaller in diameter than the flange portion and protrudes from the flange portion. The nut is screwed into the threaded portion. With the male threaded portion fitted in the fitting hole, the nut of the fuel container is engaged with the nut by tightening the nut to the male threaded portion. The fuel container holding device for a natural gas vehicle according to claim 3, wherein the fuel container holding device is fixed to the member.   A flange portion in which the neck portion of the fuel container is fixed to the body portion of the fuel container, a protruding portion having a smaller diameter than the flange portion and protruding from the flange portion, and a screw hole provided in the flange portion. The fixing member includes a bolt that is screwed into the screw hole, the engagement member has a bolt insertion hole through which the bolt is inserted, and the protruding portion is fitted into the fitting hole. 4. The fuel for a natural gas vehicle according to claim 3, wherein the bolt is inserted into the bolt insertion hole and fastened to the screw hole to fix the neck portion of the fuel container to the engagement member. Container holding device. The neck part of the fuel container has a flange part fixed to the body part of the fuel container, a projecting part having a smaller diameter than the flange part and projecting from the flange part, and a stud bolt projecting from the flange part. The fixing member includes a nut screwed into the stud bolt, the engaging member has a bolt insertion hole through which the stud bolt is inserted, and the protruding portion is fitted into the fitting hole. The natural gas vehicle according to claim 3, wherein the neck portion of the fuel container is fixed to the engaging member by tightening the nut to the stud bolt in a state where the stud bolt is inserted into the bolt insertion hole. Fuel container holding device.

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