JP2580631B2 - tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an automobile or a construction having a frame structure such as a chassis frame including a pair of frame members having upper and lower projecting pieces respectively spaced apart from each other. The present invention relates to a tank suitable for use in industrial machines such as machines and agricultural machines.

[Prior Art] Tanks generally installed in automobiles and industrial machines and the like, particularly tanks a for storing liquid fuels such as gasoline and light oil, are:
Although the shape is slightly modified in consideration of the installation location and tank volume, etc., as shown in Fig. 81 and Fig. 82, a substantially rectangular Is formed. The tank a is formed by press-forming a steel plate material subjected to rust prevention treatment or the like to form a press-formed product b serving as a tank component, and welding and joining the press-formed products b. ing. In order to further secure such a function of the tank a, as shown in FIG. 83, the tank a is provided with a fuel inlet k, a cap c, a fuel inflow pipe d, a fuel remaining amount detecting device e, and an evaporator system. , Breather pipe g, fuel outflow pipe h,
A return fuel inflow pipe i, a strainer j, a rollover valve r for preventing fuel outflow when the vehicle falls down, a baffle plate f, and the like are provided. Some of these facilities are omitted depending on the type of fuel, vehicle, and machine type.For example, in a fuel tank a of a truck or a machine equipped with a diesel engine using light oil as a fuel,
No evaporator system, breather pipe, and rollover valve are installed, and a drain 1 for internal cleaning is provided.

On the other hand, as shown in FIGS. 84 and 85, the arrangement of such a tank a is such that a fuel injection section k for securing attachment and refueling work can be installed on the outside of the vehicle body and the machine as much as possible. It is installed so as to protrude outside a frame material m such as a chassis frame. As the mounting structure, for example, as shown in the figure, an L-shaped bracket n extending outside the frame material m and holding the tank a and a steel band p surrounding the tank a and surrounding and holding the tank a are provided. To tank a
Is to be installed. Here, q is a cushion rubber provided between the tank a and the bracket n and the band p. In practice, the structure shown in FIG.
Are provided at two different locations in the longitudinal direction.

[Problems to be Solved by the Invention] Since the conventional tank a is made of steel plate, there are the following problems.

Since the steel plate tank a was heavy, the mounting workability was not good. In addition, as for the frame member m to which the steel plate tank a is attached, it is necessary to increase the strength of the frame member m itself to support heavy weight, and to secure the rigidity of other attachments such as the bracket n. Due to the above safety aspects, the weight of the vehicle body and the whole machine was increased. Furthermore,
The effect of the increase in weight due to the adoption of the steel plate tank a has also led to a decrease in fuel efficiency and power performance.

The steel plate tank a is made of a surface-treated steel plate for the purpose of rust prevention, and its outer surface is painted. By the way, the inner surface is easily corroded by water entering the tank a, and depending on the type of fuel (alcohol or the like), the inner surface has to be subjected to a surface treatment for fuel.
On the other hand, with respect to the outer surface, in the case of a vehicle or the like, the coating film or surface treatment is damaged by a stepping stone from a wheel, or the surface treatment or the coating film of a welded portion between the press-formed products b is inferior to other portions. In addition, there has been a problem that sufficient rust prevention performance cannot be ensured due to, for example, insufficient adhesion of the coating film as a feature of the surface-treated steel sheet material. Here, in order to avoid such problems and ensure sufficient quality,
Manufacturing costs including material costs, investment in manufacturing equipment, and management / inspection costs will increase.

Therefore, it is conceivable to employ a plastic tank instead of a steel plate in order to provide a high quality and low cost product in response to the problems of weight reduction and corrosion.

However, even if a plastic tank is used, the following problems in the conventional mounting structure cannot be fundamentally solved, and the problem of the use of a plastic tank in particular is a concern.

Conventionally, when the tank a is installed inside the frame member m, the mounting property and the refueling workability deteriorate, so the tank a is installed outside the frame member m. For example, in a vehicle, a frame member m constituting a chassis frame is disposed at the center in the vehicle width direction. In such a case, the tank a
In this case, it is necessary to balance the weight in the left and right directions in the vehicle width direction, and other parts to be installed and mounting positions of the devices are limited.

Further, the outside of the frame material m is an effective place to provide various auxiliary devices from the viewpoint of the mounting property, but the installation of the tank a interferes with the tank a, so that these devices cannot be properly installed. Was.

On the other hand, installing the tank a, especially the fuel tank a, outside the frame material m increases the portion exposed to the outside from the vehicle body or the machine main body, makes it easy to be exposed to sunlight, rainwater, etc., and reduces its appearance and durability. It is difficult to secure them, so that high quality materials such as paints and accessory parts are required, and there is a problem that the cost is increased.

Further, arranging the tank a outside the frame member m is directly affected by a collision force at the time of a collision, and is apt to be mischievous.

A related technology is the “fuel tank protection structure for automobiles” in which a fuel tank is installed between frames (see “
No. 137623) has been proposed, but this merely provides a tank between the frames, and various improvements are required in terms of securing the required tank capacity and mounting in the case of installing between the frames. Conceivable.

[Means for Solving the Problems] According to the present invention, a pair of frame members having upper and lower projecting pieces are arranged in parallel with a space therebetween with the projecting pieces facing each other, and inserted between the frame materials. In the tank to be bridged over, it has a portion having an outer dimension shorter than the interval between the overhanging pieces and a portion having a longer outer dimension, so that both ends of the portion having the long outer dimension are narrower than the vertical interval between the overhanging pieces. The notch is formed by forming a notch in a suitable shape at a corner connecting the portion with the short outer dimension and the portion with the long outer dimension, and inserting the short outer dimension so as to fit between the frame members. Is arranged to rotate between the upper and lower overhanging pieces so that both end portions are hung on the lower overhanging piece.

[Operation] Next, the operation of the present invention will be described. The tank is formed with an outer dimension shorter than the overhanging piece interval and an outer dimension longer than the overhanging piece interval of each of the pair of spaced frame members. Thereby, the insertion of the tank between the frame members and the mounting of the tank in a manner of bridging between the frame members are ensured. still,
Both ends of the tank that is hung on the overhanging pieces to be bridged between the frame materials are formed lower than the height between the upper and lower overhanging pieces of each frame material,
Its mounting is ensured.

Embodiments Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

Embodiment 1 In the description of the embodiment, as shown in FIGS. 3 to 6, a chassis frame 1 such as a medium / large truck is used as a pair of frame members having upper and lower overhanging pieces. Are exemplified as a pair of channel-shaped side members 2.
As can be understood from the plan view and the side view respectively shown in FIGS. 3 (I) and (II), the chassis frame 1 is juxtaposed at intervals in the vehicle width direction and extends along the longitudinal direction of the vehicle. And a plurality of cross members 3 arranged at intervals in the longitudinal direction of the vehicle to connect the side members 2 to each other.

In particular, as shown in FIGS. 4 to 6, the pair of side members 2 is formed of a channel material having a U-shaped cross section having upper and lower webs 4, 5 which are vertically projecting pieces, and partitioned by the upper and lower webs 4, 5. Channel portions 6 are arranged side by side so as to face each other. The cross member 3 has both ends at the channel portions 6.
It is sandwiched between upper and lower webs 4 and 5 and joined, and is bridged between the side members 2 to join the side members 2 to each other.

In FIG. 3, reference numerals 7 and 8 denote mounting positions of the front suspension and the rear suspension, respectively.

As shown in FIGS. 7 (I) and (II), a tank is provided at an appropriate position in the longitudinal direction of the vehicle between the pair of side members 2 configured as described above. Is provided.

In FIGS. 1 and 2 are basic configuration of this tank 9, which has a shorter outer dimension X ₁ than the distance A ₁ of the upper web 4 so as to insert from above between the pair of side members 2, the side has a longer outer dimension Y ₁ than the distance a ₁ of the lower web 5 in order to support spanned between member 2, further both ends 10 of the portion 9b of the long outer dimensions applied to the lower web 5 vertical web 4,5 low profile dimension Z than the height D ₁ of the between
₁ (see FIGS. 4, 6 and 8).
In general, the overhang dimensions of the upper web 4 and the lower web 5 are the same. Further, other external dimensions are restricted such that the long external dimension Y ₁ is within the dimension B ₁ between the cross members 3 and the short external dimension X ₁ is within the distance C ₁ between the inner surfaces of the channel portions 6 of the side members 2. Must be present (see Figure 4). In the above description, the tank 9 is inserted from above. However, even when the tank 9 is inserted from below, similar conditions may be given to the outer dimensions of the tank 9 in relation to the lower web 5. More specifically, the tank 9 has a short external dimension portion 9a that can be inserted between the side members 2 and a long external dimension portion 9b that can be bridged between the side members 2 and connects the portions 9a and 9b. Of the two corners, a pair of corners at opposing (point symmetry) positions are の of the long external dimension Y ₁ so that the tank 9 can be rotated between the side members 2.
It is formed as arc-shaped portion 9c of an arc drawn by a radius of 1 / 2Y _1. In other words, the arc-shaped portion 9c is formed as a notch in which a corner is cut out in an appropriate shape. The other pair of corner portions 9d, in order to restrict the rotation of the tank 9 between side members 2 are formed in the long dimension Q ₁ than the channel portion interior surface distance C ₁ (long Dimensions Y _1). As it is shown in Figure No. 7 (I) when placed in this manner the constructed tank 9 between the side members 2, insert the short outer dimensions X ₁ to fit between the side members 2, then arc-shaped portion 9c
The tank 9 is rotated so that. Thus by rotating Finally, the corner portion 9d having a long dimension Q ₁ than the channel portion interior surface distance C ₁ is the rotation at the point to be rotationally displaced in the channel portion 6 is regulated. As in this case is shown in Figure No. 7 (II), a short set direction outside dimension X ₁ is in the longitudinal direction of the side member 2, the direction of the long outer dimension Y ₁ becomes to align the spacing direction of the side member 2 , The tank 9 is hung on the lower web 5 at both ends 10 and is hung between the side members 2. Here, both ends 10 applied to the lower web 5, the upper and lower webs 4,5 between which is formed at a height lower dimension Z ₁ than D _1, is received within the channel section 6 (FIG. 6 and 8 See figure). And specific values examples of the tank 9, if the size of such side member 2 is given as follows, the dimension of _{A 1 = 660mm B 1 = 1053mm} C 1 = 800mm D 1 = 230mm tank 9 as an example It can be given as follows.

X ₁ = 630 mm Y ₁ = 790 mm Z ₁ = 210 mm In this case, the degree of engagement of the both ends 10 of the tank 9 with the lower web 5 is (Y ₁ −A ₁ ) ÷ 2 = 65 mm as shown in FIG. . In practice, the above-mentioned corner 9d and each edge 9e of the tank 9 are given considerable roundness. For example, as shown in FIG.
When giving a roundness of curvature of mmR, the hanging degree E ₁ is 30 mm
Becomes

By the way, as a material of the fuel tank 9 installed between the side members 2 as described above, from the viewpoints of securing the shape (moldability), quality, cost, etc., fuel such as polyethylene, nylon, and saturated polyester resin is used. It is preferable to use a plastic material that is stable against the material alone, or to employ a blend of these materials, and form a single layer or multiple layers by a general plastic molding method such as blow molding. Although it is desirable that the tank 9 is integrally formed, it may be formed by welding, bonding, or the like as a component configuration. Further, as shown in FIG. 15, when it is desired to form the baffle plate 11 or the like inside the tank 9, for example, the tank wall 12 may be formed so as to partially protrude inward. There are methods such as baffle plate insert blow molding and welding of divided parts by baffle plate integral injection molding).

Next, a structure for fixing the tank 9 between the side members 2 will be described with reference to FIGS. 9 to 13. FIG.

When mounting and fixing the tank 9, the side member 2
In addition to suppressing vertical play, horizontal play, and front-to-back play in the channel portion 6, the rotation of the tank 9 that is rotated and installed is regulated.

As shown in FIGS. 9 to 11, the vertical play is regulated by disposing a bracket 13 having a step δ diagonally between the side members 2 below the tank 9 along the diagonal direction. Done. The bracket 13 has a central portion 13b abutting against the bottom surface of the tank 9 with respect to both end mounting portions 13a mounted from below on the lower web 5 of the side member 2.
Is raised with a step δ, as shown in FIG. 12, the tank 9 is pushed upward at the central portion 13b having the step δ, and both ends 10 of the tank are lifted above the lower web 5 to be pressed against the upper web 4. The upper web 4 is sandwiched between the upper web 4 and the upper web 4 to fix the upper web 4.

The center portion 13b of the bracket 13 and the upper web 4
A cushioning material 14 having a considerable contact area is interposed between the lower surface of the tank 9 and the outer wall of the tank 9.

As shown in FIGS. 9 and 12, the play in the left-right direction is controlled by a band-shaped buffer having a considerable length interposed between the inner surface of the channel 6 of each side member 2 and the outer wall of the tank 9 as shown in FIGS. It is performed by the material 14.

Further, as shown in FIG. 9 and FIG. 13, the backlash in the front-rear direction and the rotation are regulated by a bracket 15 which is continuously extended between the side members 2 along the outer wall of the tank 9 and the bracket 15. And a bracket 16 which is engaged with a corner 9d of the tank 9 on the opposite side of the tank 9 between them. One bracket 15 is formed in a flat plate shape so as to be in close contact with the outer wall of the tank 9, and is fixed to each side member 2 at both ends folded portions 15 a. The other bracket 16 is formed in an L shape, and a piece 16a along the outer wall of the tank 9 abuts on a corner 9d of the tank 9, and is fixed to the side member 2 by a folded piece 16b. These brackets 15 and 16 sandwich the tank 9 from the front-back direction of the side member 2 and regulate play in the front-back direction. In addition, the return of the rotation of the tank 9 in which the corner 9d of the tank 9 is separated from the channel 6 is as follows.
The corner 9d is regulated by being engaged with the brackets 15 and 16 and held in the channel portion 6.
Therefore, one bracket 16 is formed so as to correspond to only the corner 9d, and the arc-shaped portion 9c side is omitted. Incidentally, a cushioning material 14 having a considerable length is provided between the brackets 15 and 16 and the outer wall of the tank 9.

Next, the structure for refueling the tank 9 will be described with reference to FIGS.

FIG. 16 shows the basic configuration. Tank 9
Is installed inside the chassis frame 1 between the side members 2 and the rear body 18 is installed on the side members 2 via the joists 17, so that it is located in a space shielded from the outside. . On the other hand, the oil supply system 19 needs to be able to supply oil to the tank 9 from the outside. In this embodiment, the oil supply system 19 extends outward through an opening 20 formed in the side member 2. You. At this time, regarding the refueling system 19,
It should be located below it so as to cover it with the rear body 18 so as not to be exposed to the outside, and the oil supply port 21 should be located higher than the tank 9 in order to secure a sufficient amount of oil to fill the tank 9. In order to install the joists 17 and the rear body 18 after the installation of the tank and the provision of the oil supply system 19 in the process, it is considered to install the joist 17 and the rear body 18 at positions that do not interfere with these rear bodies 18.

The refueling system 19 mainly includes an inflow pipe portion 22 integrally formed with the tank 9, a pipe 23 extending to the outside of the side member 2 through the opening portion 20, and connects these pipes 23 and the inflow pipe portion 22. And a cap 25 for opening and closing the oil supply port 21 at the end of the pipe 23. The inflow pipe section 22 is
As shown in FIGS. 16 to 18, the opening 20 of the side member 2 is formed.
In particular, as shown in FIG. 19, the shape of the tank 9 in the vicinity of the inflow pipe portion 22 is changed so that the connection with the hose 24 can be performed without interfering with the side member 2. (Indicated by a broken line in the figure), and is partially formed with a recess 26. The hose 24 has a two-layer structure of a general outer layer chloroprene rubber and an inner layer NBR, or a single layer structure made of a blend material of polyvinyl chloride and NBR. The hose of the present embodiment
24 is disposed between the strong side members 2 and does not have to worry about breakage or the like, so that reinforcement or the like by a wire blade used in a passenger car or the like is unnecessary. As shown in FIG. 20, this hose 24 has a general hose band at both ends.
27 tightens the inflow pipe portion 22 and the pipe 23 to connect them.

As shown in FIGS. 16, 20, and 21, the pipe 23 extends outward from between the side members 2 through the opening 20, and has a fuel supply port 21 at a distal end. A bracket 28 having an L-shaped cross section is fixed at an appropriate position on the outer peripheral side of the pipe 23, and the bracket 28 is fixed to the side member 2 by being attached to the side member 2. In particular, when this pipe 23 is refueled by inserting a refueling gun,
Tank 9 with a liquid amount that has a suitable space secured between the tip of the gun
Is formed in an appropriate length and shape so that the tank becomes full. In addition, as a general structure, the filler port 21 of the pipe 9
A groove 30 for guiding the hook portion 29 of the cap 25 to enter, an annular flange portion 31 for engaging the hook portion 29 and guiding its rotation, and a hook protruding from the flange portion 31 and rotating along the flange portion 31. A stopper portion 32 for stopping the portion 29 is formed. 20 and 22, a cap cover 33 forming an outer shell and an inner cap 35 to which a holder 34 having a hook portion 29 is fixed are joined to each other as shown in FIGS. An annular seal rubber 36 which seals the periphery of the oil supply port 21 of the pipe 23 is sandwiched between the inner cap 35 and the inner cap 35. Incidentally, the cap 25 may be provided with an air breather for preventing the inside of the tank 9 from becoming negative pressure during fuel supply.

Next, an outlet for leading fuel from the tank 9 to the engine and the like and a structure of a return for returning excess fuel to the tank 9 will be described with reference to FIGS. 23 to 29. In this embodiment, since these have the same structure, the structure of the outlet will be described as an example.

As shown in FIG. 23, a connector 37 is provided at the upper wall position of the tank 9 so as to penetrate the tank 9 and form a fuel outlet path inside and outside the tank 9. As shown in FIG. 24, in this connector 37, a vent pipe 38 and a mounting flange 39 are integrally formed of the same material as the tank 9, and the mounting flange 39 is joined to the tank 9 by hot plate welding or the like. Fixed. As shown in FIG. 25, this connector 37 has a tank inner end 37.
A pipe 40 inserted deep into the tank 9 is engaged and connected to a, and a hose 41 is connected to the tank outer end 37b. For attachment, a pipe 40 is connected to the connector 37 in advance, the pipe 40 is inserted into the tank 9, and then the connector 37 is joined to the tank 9. Thereafter, the tank 9 is fixed between the side members 2, and finally, the hose 41 and the connector 37 are fixed by a general band clip 42 as shown in FIG.
And will be connected. Although not shown, the pipe 40
In general, a strainer (for preventing foreign matters and moisture in fuel in cold regions from being absorbed by sherbet) is attached to the lowermost portion.

Next, a mounting structure of a liquid meter or the like will be described with reference to FIGS. 27 to 29.

As shown in the drawing, an opening 43 is formed in the tank 9 by piercing a mounting portion, and a bolt 45 is mounted around a peripheral portion 44 of the opening 43 at appropriate intervals along the circumferential direction. The ring-shaped reinforcing plate 46 is fitted by insert molding or the like at the time of forming the tank 9. A seal ring 47 is fitted around the periphery of the opening 43 inside the reinforcing plate 46. When mounting a liquid meter or the like, a unit such as a sealed liquid meter is inserted into the tank 9 through the opening 43 and the reinforcing plate 46 is inserted.
What is necessary is just to fix to. Note that this structure can be applied to the drain portion. In addition, by integrating the outlet and return structures with a liquid meter or the like, the work of mounting various parts can be simplified.

As described above, the side member 2 disposed at the center in the vehicle width direction after the configuration such as the oil supply structure is supported.
Since the tank 9 is arranged in between, it is possible to easily and accurately secure the right and left weight balance in the vehicle width direction,
Therefore, it is possible to rationally and efficiently mount other components and devices to be installed.

In addition, the outside of the effective side member 2 can be sufficiently secured as a mounting space from the viewpoint of convenience in mounting various devices.

In addition, the space between the side members 2 is a space shielded from sunlight, rainwater, and the like, and the environment is relatively gentle. Therefore, the appearance and durability can be sufficiently secured, so that material costs and the like can be reduced. In the case of a tank, the temperature fluctuation due to solar radiation is small, so that the fuel temperature can be kept constant.

Further, the tank 9 is protected between the side members 2 having high rigidity, so that the tank 9 is hardly damaged even at the time of collision or the like, so that safety can be improved. Also when installing the tank 9 between the side members 2, short after the external dimensions X ₁ was inserted as fit between the side members 2, as arc-shaped portion 9c is ahead enters between the upper and lower webs 4,5 Since both ends 10 are fitted between the webs 4 and 5 from the direction in which the side member 2 is opened, a substantial portion of both ends 10 can be reliably and easily hung on the lower web 5.

By disposing the tank 9 between the side members 2, the introduction of the plastic tank 9 can be achieved. As a result, it is possible to reduce the weight of the tank 9 and the peripheral parts due to the weight reduction,
Power performance can be fully exhibited.

In addition, since the plastic tank 9 is free from corrosion, it is possible to eliminate the surface treatment and the rust preventive treatment such as painting required for the improvement of durability and long-term use, and to reduce the production cost and the material cost. Can also.

FIG. 30 and FIG. 31 show modifications of the shape of the tank 9. In order to increase the capacity of the tank, it is necessary to rotate the tank 9 at the time of insertion and to increase the capacity of the side member 2.
The tank portion 48 which is always positioned between the side members 2 in a state of being bridged therebetween is expanded downward or upward and downward. By doing so, a sufficient tank capacity can be secured. At this time, the bulging part 48
The outer diameter R ₁ of the arcuate portion 49 of, in order to prevent interference with side members 2, equal to or shorter external dimensions X _1, which are set smaller in diameter than. When such a bulging portion 48 is formed, interference with the propeller shaft does not occur when bulging downward, and interference with the rear body 18 does not occur when bulging upward. Will be considered.

By the way, the tank 9 according to the present invention has an outer dimension shorter than the interval between the overhanging pieces so as to be inserted between a pair of frame members having upper and lower overhanging pieces, and also extends over the frame material. This includes various external shapes other than the above-described embodiment and modified examples, as long as the external dimensions are longer than the one-piece spacing and both ends to be hooked on the overhanging pieces are formed to be lower than the height between the upper and lower overhanging pieces. In addition, from the viewpoints of strength, moldability, fixing property, and the like, those having irregularities formed on the surface are also included.

FIGS. 32 to 35 show still another modification of the tank shape.

In FIGS. 32 and 33, the tank 9 in the above embodiment (see FIG. 1) has a substantially rectangular plane shape, but is changed to a substantially parallelogram plane shape.
In the tank 9 in the above embodiment, the long outer dimension Y ₁ of it is set to be substantially equal to the inner surface distance C ₁ between the side members 2, resulting diagonal dimension T ₁ (see FIG. 1) is subject to limitation, is equivalent extend the diagonal dimension T ₂ by changing the shape of a parallelogram can be made larger than the outer dimension Y ₁ the longer, it is possible to easily increase the tank capacity. Further, the rotation angle when the tank 50 is installed between the side members 2 can be reduced, and the workability can be improved. In this modification, bulging portions 48 are formed in portions other than the both ends 10 which are hung on the lower web 5. In the present embodiment, X ₂ must have been made in A ₁ smaller dimensions.

On the other hand, the one shown in FIG. 34 and FIG. 35 is such that the bulging portion 48 is formed to increase the tank capacity, and the tank 51 inserted between the side members 2 is rotated to The tank 51 is designed to prevent the bulging portion 48 from interfering with the side member 2 at the time of bridging.
It is. The tank 51, the external shape of the bulging portion 48 is formed in a substantially cylindrical shape of slightly shorter outside diameter R ₂ than the distance A ₁ of upper and lower web 4 and 5, the side members 2 during rotation work Interference is prevented. Further, since the shape is nearly spherical, it is advantageous against internal pressure.

36 to 40 show that it is difficult to accurately adjust the height of the tank 9 between the upper and lower webs 4 and 5 when the tank 9 is rotationally inserted between the side members 2. In consideration of this, an engagement hook 52 capable of setting the height position is provided in the tank 9. The engaging hooks 52 are provided on both sides of the long portion 9b of the outer dimension parallel to the upper web 4 when the tank 9 is inserted between the side members 2 so as to correspond to the position of the rotation center O of the tank 9. And by welding or the like. Tip dimension between G ₁ of the engagement hook 52 is formed longer than the upper web spacing A _1, and as base of dimension between G ₂ of the engaging hook 52 does not interfere with the time of the web 4 the rotation of the tank 9, It is shorter than the upper web spacing A _1. Furthermore width G ₃ of the engagement hook 52, the tank 9 to be rotated is set at a length that is engaged maintained above web 4 to take on the lower web 5. The height G between the engagement surface 52a of the engagement hook 52 and the bottom surface of the tank 9
₄ is formed to be slightly lower than the height (D ₁ + t) obtained by adding the thickness t of the upper web 4 to the height D ₁ between the upper and lower webs.

If such an engagement hook 52 is provided, the side member 2
The tank 9
Setting of the insertion height position, the stability of the tank 9 during the rotation work can be improved, and the workability can be improved. In addition, since the engaging hook 52 may simply be hooked between the upper webs 4 during the insertion work, the work can be easily performed by the worker himself, and a large-scale work such as hanging and rotating the tank 9 using a crane or the like can be performed. It can be abolished, and accordingly, preparation of working parts such as a tank suspension jig can be omitted.

Incidentally, the shape of the engagement hook 52 may be formed in an arc around the rotation center O as shown in FIG.

The one shown in FIGS. 41 to 43 is a modification of the above modification (FIGS. 36 to
In consideration of the same points as in FIG. 40), a hollow circular flange portion 54 is formed integrally with the tank 53 so that an air space or an oil supply space can be secured above the tank 53. The circular flange portion 54 has a thickness t greater than the depth H ₁ of the upper web 4, circular on web spacing A ₁ to the center of rotation O clockwise so that the interference does not occur between the upper web 4 during tank rotation Reduced diameter part 55 formed on
And an overhang formed on the upper web 4 at least along a long portion 9b of concentric shape formed at least above the outer dimension
Than web spacing A ₁ for the formation of 56 composed of the large-diameter portion 57 having a larger outer diameter R _3. The edge portion 57a of the large-diameter portion 57 along the short portion 9a of the outer dimension is formed on the upper web 4 of the side member 2 so as not to interfere with the installation of the joist 17 or the like on the side member 2 in a later process. It is cut along and formed. With such a configuration, in the structure for forming the above-described engagement hook 52, further securing of capacity can be achieved, which is rational.

44 to 51 show modifications of the oil supply structure. In the oil supply structure shown in the above embodiment (see FIGS. 16 and 20), the pipe 23 extending from the space between the side members 2 to the outside of the side members 2 is made of a steel plate or the like and is formed rigidly. Therefore, if the pipe 23 is attached to the inflow pipe portion 22 of the tank 9 in advance, the pipe 23 interferes with the side member 2 when the tank 9 is rotated and cannot be rotated to an appropriate position. Then, after the tank 9 is rotated and installed, the pipe 23 is mounted. However, the pipe 23 is mounted in a narrow space between the side members 2 and between the upper and lower webs 4 and 5, which is a problem.

Here, the present modification utilizes a recess 26 around the inflow pipe portion 22 of the tank 9 and can be accommodated in the recess 26 and extendable to the outside of the side member 2 so as to be able to extend and contract or to extend and contract. (See Fig. 46).

With this configuration, it is possible to attach the pipe 58 with the cap 25 attached thereto in a wide place in advance to the inflow pipe portion 22 before the operation of inserting the tank 9 between the side members 2, and together with the tank 9. Installation work can be performed, and workability can be improved. Also, in the recess 26 of the tank 9,
As shown in FIGS. 44, 45, 50 and 51, a cap is used to maintain the contracted or bent state of the pipe 58.
Engagement projections 59 for engaging and holding 25 and the like and maintaining the pipe 58 in the recess 26 are integrally formed.

If the pipe 58 approaches the opening 20 of the side member 2 by rotating the tank 9, then the pipe 58 is drawn out of the side member 2. Then Figures 47 to 49
As shown in the figure, a fixing bracket 60 provided on the pipe 58 is joined to the side member 2 or fastened and fixed with a bolt and nut.

(Embodiment 2) The tank 61 of this embodiment has the same basic configuration as the tank 9 of the above-described embodiment 1 and the like, but has a specific configuration as shown in FIGS. 2 has a short external dimension portion 9a that can be inserted between the side members 2 and a long external dimension portion 9b that can be bridged between the side members 2.
four corner portions connecting the b is formed of an arc drawn by the long outer dimension Y ₁ so as to rotate the tank 61 between the side members 2 as the arc-shaped portion 9c (consequently, the entire short Dimensions portion 9a Are arc-shaped).

In installing this manner the constructed tank 61 between the side members 2, as shown in FIG. 56 (I), and insert the shorter external dimensions X ₁ to fit between the side members 2,
Thereafter, the tank 61 is rotated clockwise or counterclockwise. And
It is rotated by about 90 ° and fixed when the side member 2 and the long outer dimension portion 9b of the tank 61 are at a right angle. As in this case is shown in Figure No. 56 (II), a short set direction outside dimension X ₁ is in the longitudinal direction of the side member 2, the direction of the long outer dimension Y ₁ becomes to align the spacing direction of the side member 2 , The tank 61 has both ends 62 hung on the lower web 5,
It will be bridged between the side members 2.

Specific numerical examples may be based on the first embodiment.

Next, a structure for fixing the tank 61 between the side members 2 will be described with reference to FIGS. 57 and 58.

At the time of mounting and fixing the tank 61, as in the first embodiment, a vertical play, a horizontal play, and a front-to-back play in the channel portion 6 of the side member 2 are suppressed, and other horizontal play is also suppressed. Regulation of rotation is considered.

The play in the vertical direction and the play in the horizontal direction are controlled by the bracket 13 and the cushioning material 14 as in the first embodiment (see FIGS. 10 to 12).

Fig. 57 and Fig. 57
As shown in FIG. 58, a pair of brackets 15 sandwiched between the side members 2 sandwiching both sides of the tank 61 in the front-rear direction.
(See FIG. 13). In this embodiment, the tank 61
Unlike the first embodiment, the two brackets 15 can rotate in the left and right directions, so that the four brackets 15 restrict the separation of the four corners from the channel portion 6 and are fixed.

The bracket 15 has an opening 15b at an appropriate position to reduce its weight.

 Other configurations are the same as those of the first embodiment.

Even in the second embodiment, it is needless to say that the same effects as those of the first embodiment can be obtained.

59 to 61 show modifications of the shape of the tank 61. FIG. These are similar to those shown in FIGS. 30 and 31 of the first embodiment, in which a bulging portion 48 is formed downward or upward and downward to increase the tank capacity.

62 to 68 show modifications of the mounting and fixing structure in the first and second embodiments. In this modification, the fixing structure is rationalized by using a cross member 3 having a U-shaped cross section provided between the side members 2. FIGS. 62 to 64 show a fixing structure corresponding to the first embodiment, in which the tank 9 bridged between the side members 2 is moved along the channel portion 6 to the position of the cross member 3 in the front-rear direction. Slide the inner surface 3a and lower flange 3b of the cross member 3 and the pair of side members 2
The tank 9 is positioned and supported by the inner surface 6a of the channel portion and the lower web 5. In this case, the play in the vertical direction is restricted by the cross member 3 and the corner 9d on the opposite side. On the cross member 3 side
As shown in FIGS. 62 and 64, the upper member 3 is appropriately disposed along the longitudinal direction of the upper flange 3c of the cross member 3 on the upper surface of the tank 9, and is fitted into the upper flange 3c by pressing the tank 9 toward the cross member 3. The claw body 63 and the cushioning material 14 interposed between the lower surface of the tank 9 and the lower flange 3b of the cross member 3 allow the tank 9 to be connected to the upper and lower flanges 3b of the cross member 3.
The play is regulated by sandwiching between c. On the other hand, a bracket 64 having an L-shaped cross section having a bent portion 64a facing the lower web 5 is attached to the corner 9d opposite to the cross member 3, and a tank is provided between the bent portion 64a and the lower web 5. 9 is sandwiched and fixed in the vertical direction.

In addition, the play and rotation in the front-rear direction are regulated by sandwiching the tank 9 between the cross member 3 and a bracket 64 having a vertical portion 64b opposed thereto. In addition, 14
Is the outer wall of the tank 9, the inner surface 3a of the cross member, and the side member 2.
Is a cushioning material interposed between the upper and lower webs 4, 5 and the bracket 64 to prevent backlash.

On the other hand, what is shown in FIGS. 65 to 68 is a fixing structure corresponding to the second embodiment.

Also in this case, the structure for the cross member 3 is the same as that described above (see FIGS. 62 and 64). On the other hand, as a fixing structure on the side opposite to the cross member 3 side, on the side wall of the tank 61, there is provided an engagement protrusion 65 that fits into the hole 15c formed at an appropriate interval in the bracket 15 along the longitudinal direction thereof. As a result, the upper, lower, left and right positions are fixed. In addition, between the outer wall of the tank 61 and the inner surface 3a of the cross member, the bracket 15, the inner surface 6a of the channel portion of the side member 2, and the upper and lower webs 4, 5, a cushioning material 14 for regulating the play between them is provided. Especially the side member 2
The method of installing the cushioning material 14 between the tank 61 and
As shown in the figure, the lower web 5 may be provided so as to pass through the channel inner surface 6a to the upper web 4 and, as shown in FIG. 68, the lower web 5 and the channel inner surface 6a may be partially surrounded. It may be provided in some way.

By doing so, it is possible to reduce the weight of the mounting structure, reduce the number of parts, and simplify the mounting operation.

FIGS. 69 to 79 relate to Embodiments 1 and 2 in which the tanks 9 and 61 are rotated and attached, and the center of rotation is structurally secured.

As shown in FIGS. 69 and 70, between the lower webs 5 of the side members 2 where the tank 9 is to be mounted, a bracket 66 for rotation control is provided so as to extend over these. The bracket 66 has an upwardly projecting portion 67 corresponding to a substantially central position between the side members 2. On the other hand, as shown in FIGS. 71 and 72, a concave portion 68 is formed at the bottom of the tank 9 at the center of rotation thereof so as to face the convex portion 67 of the bracket 66 and engage with each other. And these recesses 68
By engaging the projections 67 with each other, the position of the tank 9 between the side members 2 when the tank 9 is inserted between the side members 2 is set, and the rotation center in the subsequent rotation work is set. Has become. And the second
As shown in FIGS. 73 to 75, the tank 9 is
By inserting the concave portion 68 and the convex portion 67 into each other and rotating the tank 9 around the concave portion 68 and the convex portion 67, the tank 9 can be smoothly and accurately spanned between the side members 2. The workability can be improved by preventing the center from being displaced and blurring during the rotation work. In addition, since accurate rotation work can be performed in this way, even when harnesses are provided in the periphery, it is possible to prevent the harnesses from being damaged.

As shown in FIG. 76, the L-shaped bracket 64 (see FIG. 63) fixes the tank 9 in this manner.
Alternatively, this can be achieved by employing a structure in which an engagement projection 65 inserted into the hole 15c of the bracket 15 is provided on the tank 9 (see FIG. 66).

Further, in this modification, the following configuration may be adopted in consideration of the case where the tank 9 is slid to the position of the cross member 3 for the purpose of weight reduction as described above.

First, when the tank 9 is slid to the position of the cross member 3 as shown in FIG. 77 in advance on the bottom of the tank 9, the tank 9 is moved to a position corresponding to the convex portion 67 of the rotation regulating bracket 66.
A second recess 69 is formed (see FIGS. 71 to 73).
Then, after rotating the tank 9 to span between the side members 2, the concave portion 68 is separated from the convex portion 67, and the tank 9 is slid toward the cross member 3 so that one side of the tank 9 is connected to the lower flange of the cross member 3. 3b, the second concave portion 68 can be simultaneously engaged with the convex portion 67 of the bracket 66, as shown in FIGS. 77 and 78, whereby the tank 9 can be properly fixed. . In this case, the above-described claw body 63 (see FIG. 64) and the L-shaped bracket 64 (see FIG. 63) can be used as the structure for controlling the displacement. Particularly, as shown in FIGS. 78 and 79, an L-shaped bracket 70 is provided on the rotation regulating bracket 66 so as to sandwich the tank 9 between the rotation regulating bracket 66 and the cross member 3. The deviation may be regulated by these. In this case, the L-shaped bracket 64 can be omitted. In addition, 14 is a cushioning material.

As shown in FIG. 80, in all the embodiments, in the event of a failure such as the removal of the propeller shaft 101 at the center lower portion of the bracket 100 that bridges between the left and right side members 2 to support the bottom surface of the tank 9, A shaft guard 102 for preventing the lifting of 101 can be provided.

If the tank of the present invention is manufactured from steel, the manufacturing cost will increase due to the increase in the number of parts.
There is also a danger of stress being concentrated on the weld and leading to fracture.

[Effects of the Invention] In summary, according to the present invention, the following excellent effects are exhibited.

For example, since the tank is arranged between the frame members arranged in the center in the vehicle width direction, the weight balance in the vehicle width direction left and right and the like can be easily and accurately secured, and therefore, other parts to be installed And equipment can be rationally and efficiently attached.

Further, the outside of the effective frame material can be sufficiently secured as a mounting space from the convenience of the mounting work of various devices. Alternatively, the wheelbase length can be reduced.

In addition, since the space between the frame members is often a space shielded from sunlight, rainwater, etc., and the environment is relatively gentle, the appearance and durability can be sufficiently ensured, and the material cost can be reduced. For example, in the case of a fuel tank, the temperature fluctuation due to solar radiation is small, so that the fuel temperature can be kept constant.

Further, the tank is protected between the frame members, so that the tank is hardly damaged even at the time of collision or the like, so that the safety can be improved. Also, when installing this tank between the frame materials, insert the short outer dimension between the frame materials, then rotate so that the notch enters between the upper and lower overhanging pieces in advance, and Since both ends are fitted between the overhanging pieces from the opening direction, a substantial portion of both ends can be reliably and easily hooked on the lower overhanging pieces.

And, by arranging the tank between such frame materials, the introduction of the plastic tank can be realized.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a tank according to Embodiment 1 of the present invention, and FIG.
FIG. 3 is a plan view, FIG. 3 is a view showing a chassis frame, FIG. 3 (I) is a plan view, FIG. 3 (II) is a side view, and FIG. 4 is a view in FIG. 5) is an enlarged plan view of part A, FIG. 5 is a front view thereof, FIG. 6 is a cross-sectional view taken along line BB of FIG. 4, and FIG. FIG. 7 (I) is a plan view when the tank is inserted, and FIG.
I) is a plan view when the tank is rotating, FIG. 8 is a view for explaining the state of the tank being bridged over the side members, FIG. 8 (I) is a front sectional view, and FIG. 8 (II) is a plan view. FIG. 9 is a plan view showing a fixed state of the tank, FIG. 10 is a partially cutaway perspective view showing a bracket to be adopted, FIG. 11 is a sectional view taken along line EE of FIG. FIG. 12 is a cross-sectional view taken along line DD of FIG. 9, FIG. 13 is a cross-sectional view taken along line CC of FIG. 9, FIG. 14 is an enlarged view of a portion F in FIG. FIG. 15 is a cross-sectional view showing a case where a baffle plate is integrally molded with a tank, FIG. 16 is a cross-sectional view showing a basic structure of a fuel supply structure, FIG. 17 is a side view thereof, and FIG. 18 is a partially cutaway plan view thereof. , FIG. 19 is a cross-sectional view showing the shape of the tank in the vicinity of the inflow pipe portion, FIG. 20 is a cross-sectional view showing a specific mounting example of the refueling structure, FIG. 21 is a perspective view of the pipe used, and FIG. Be done Sectional side view of the cap, the
Figure 23 is a cross-sectional view showing the tank mounting part of the outlet structure,
FIG. 24 is a perspective view of the adopted connector, FIG. 25 is an exploded view showing the attachment connection of the outlet, FIG. 26 is a perspective view showing the adopted band clip, and FIG. FIG. 28 is an enlarged view of a portion G in FIG. 27, FIG. 29 is a perspective view showing a reinforcing plate to be adopted, and FIG. 30 is a view showing a modification of the tank shape, FIG. 30 (I) is a plan view thereof, FIG. 30 (II) is a front view thereof, FIG. 30 (III) is a side view thereof, and FIG. 31 is a diagram showing another modification of the tank shape. FIG. 31 (I) is a plan view, FIG. 31 (II) is a front view, FIG. 31 (III) is a side view, and FIG. 32 is a view showing still another modification of the tank shape. Fig. 32 (I)
Is the plan view, FIG. 32 (II) is the front view, and FIG. 32 (II
I) is a side view thereof, FIG. 33 is a view for explaining the mounting of the tank, FIG. 33 (I) is a plan view thereof, and FIG. 33 (II) is a front view showing arrangement of side members. FIG. 34 is a view showing still another modification of the tank shape, wherein FIG. 34 (I) is a plan view thereof, FIG. 34 (II) is a front view thereof, and FIG.
Fig. (III) is a side view thereof, Fig. 35 is a plan view showing installation of the tank, Fig. 36 is a plan view showing an inserted state of a tank having an engagement hook, and Fig. 37 is a plane view showing its rotated state. FIG. 38 is a sectional view taken along the line HH of FIG. 36, FIG. 39 is a perspective view of an engaging hook employed, FIG. 40 is a plan view showing a modification of the engaging hook, FIG. The figure is a plan view showing still another modification of the tank shape, FIG. 42 is a view showing the tank, FIG. 42 (I) is a front view thereof, FIG. 42 (II) is a side view thereof, 43 is a plan view showing the state of attachment, FIG. 44 is a perspective view showing a modification of the oil supply structure, FIG. 45 is an enlarged sectional view of a main part thereof, FIG. 46 is a perspective view showing a pipe adopted, FIG. 47 is a cross-sectional view showing the mounting state, FIG. 48 is a front view thereof, FIG. 49 is a cross-sectional view showing another mounting structure, FIG. 50 is a perspective view showing another modification of the lubrication structure, and FIG. The figure shows the refueling system FIG. 52 is a perspective view showing a tank of Embodiment 2 of the present invention, and FIG. 53 is a view showing the tank, and FIG. 53 (I) 53 is a plan view thereof, FIG. 53 (II) is a front view thereof, FIG. 54 is a front view showing a mounted state, FIG. 55 is a plan view thereof, and FIG. FIG. 56 (I) is a plan view when the tank is inserted, FIG. 56 (II) is a plan view when the tank is rotating, FIG. 57 is a plan view showing a fixed state of attachment, and FIG. FIG. 59 is a perspective view showing a modification of the shape of the tank, and FIG.
FIG. 60 is a view showing the tank, FIG. 60 (I) is a plan view thereof, FIG. 60 (II) is a front view thereof, and FIG. 60 (III).
61 is a side view thereof, and FIG. 61 is a view showing another modification of the shape of the tank. FIG. 61 (I) is a plan view thereof, and FIG.
I) is a front view thereof, FIG. 61 (III) is a side view thereof, FIG. 62 is a plan view showing a modification of mounting the tank of the first embodiment, FIG.
FIG. 62 is a sectional view taken along the line II of FIG. 62, FIG. 64 is a sectional view taken along the line JJ of FIG. 62 and FIG. 65, and FIG. FIG. 66 is a plan view of FIG.
FIG. 67 is a sectional view taken along line LL of FIG. 65, FIG. 67 is a sectional view taken along line MM of FIG. 65, and FIG. 70 is a plan view showing a bracket employed in the modification of FIG. 70, FIG. 70 is a cross-sectional view taken along the line NN of FIG. 69, FIG. 71 is a plan view of the tank, and FIG. 72 is PP of FIG. FIG. 73 is a plan view showing a state where the tank is inserted and rotated, FIG.
74 is a sectional view taken along line QQ of FIG. 73 showing the engaged state of the convex portion and the concave portion employed, FIG. 75 is a plan view showing the rotating state of the tank, and FIG. 76 is a fixed state of the tank Plan view showing the 77th
The figure is a plan view showing the state where the tank has been moved to the cross member position, FIG. 78 is a sectional view taken along the line RR in FIG. 77, and FIG.
FIG. 78 is an enlarged sectional view of a portion S in FIG. 78, FIG. 80 is a front view showing an example of employing a shaft guard, FIG. 81 is a perspective view showing a conventional tank, and FIG. 82 is a perspective view showing another conventional tank. FIG. 83 is a sectional view showing the structure inside the conventional tank, FIG. 84 is an exploded perspective view showing the conventional mounting structure, and FIG. 85 is a front view showing the conventional mounting state. In the figure, 2 is a side member exemplified as a frame material, 4 and 5 are upper and lower webs exemplified as upper and lower overhanging pieces, 9, 50, 51, 53, 61,
71 is a tank and 10,62 are both ends.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Seiichi Takada 8 Dosanagi, Fujisawa-shi, Kanagawa Prefecture Isuzu Motors Corporation Fujisawa Plant (72) Inventor Junichi Kawanishi 8 Isuzu-Murado, Fujisawa-shi, Kanagawa Fujisawa Plant, Isuzu Motors Limited (72) Inventor Etsuo Akatsuka 8 Dosana, Fujisawa-shi, Kanagawa Prefecture Inside Fujisawa Plant of Isuzu Motors Co., Ltd. (72) Inventor Eiichi Nakagawa 8 Dosanagi, Fujisawa-shi, Kanagawa Prefecture Fujisawa Plant of Isuzu Motors Corporation (72) Inventor Nozomu Orii 8 Tsurana, Fujisawa-shi, Kanagawa Prefecture Isuzu Motors Corporation Fujisawa Plant (56) References Japanese Utility Model Showa 61-87727 (JP, U)

Claims (1)

(57) [Claims] A pair of frame members having upper and lower projecting pieces are arranged in parallel with a space therebetween with the projecting pieces facing each other. It has a portion having an outer dimension shorter than the protrusion interval and a portion having a longer outer dimension, and both ends of the long outer dimension are formed so as to be narrower than the vertical interval between the overhanging pieces. After forming a notch cut in an appropriate shape at the corner connecting the portion with the long outer dimension and inserting the short outer dimension between the frame members, the notch is preceded by the upper and lower A tank configured to rotate so as to enter between the overhanging pieces so as to hang the end portions on the lower overhanging pieces.