vehicle

Abstract

To provide a vehicle that allows for easy design of the vehicle's structural integrity. [Solution] A vehicle 1 is provided with an upper mounting frame 8 and rear mounting frames 9, 10 extending in the left-right direction of the vehicle body, and a pressurized evaporator 7 can be attached to each of these mounting frames 8-10. A weight 12 is attached to each of the mounting frames 8-10 provided for the pressurized evaporator 7. This makes it possible to approximate how the load is applied to the vehicle body (each of the mounting frames 8-10) in the state in which the pressurized evaporator 7 is attached and in the state in which the weight 12 is attached. Thus, the strength design of the vehicle body can be made easier.

Description

Technical Field

[0001] The present invention relates to a vehicle, and particularly to a vehicle that can facilitate the strength design of the vehicle body.

Background Art

[0002] For example, Patent Document 1 describes a tank truck (vehicle) to which a pressurized evaporator is attached to the vehicle body. Depending on the vehicle type of the tank truck, the pressurized evaporator may not be attached. In this case, a weight having the same weight as the pressurized evaporator is attached to the vehicle body. Thereby, since it is possible to suppress an increase in the center of gravity of the vehicle body, the stability during traveling of the tank truck can be ensured.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, since the conventional weight was attached at a position different from the pressurized evaporator, it was necessary to consider the strength of the vehicle body in each state of the attachment state of the pressurized evaporator and the attachment state of the weight. Therefore, there was a problem that the strength design of the vehicle body became complicated.

[0005] The present invention has been made to solve this problem, and an object thereof is to provide a vehicle that can facilitate the strength design of the vehicle body.

Means for Solving the Problems

[0006] To achieve this objective, the vehicle of the present invention comprises a tank on which cargo is loaded, a vehicle body supporting the tank, and mounting frames fixed to the vehicle body and extending in the left-right direction, wherein a plurality of the mounting frames arranged in the front-rear direction can be fitted with pressurized evaporators, and weights having the same mass as the pressurized evaporators can be fitted with the plurality of the mounting frames. [Effects of the Invention]

[0007] According to the vehicle described in claim 1, since weights having the same mass as the pressurized evaporator can be attached to multiple mounting frames to which the pressurized evaporator is attached, the way the load is applied to the vehicle body can be approximated in both the state in which the pressurized evaporator is attached and the state in which the weights are attached. Therefore, this has the effect of making the structural design of the vehicle body easier.

[0008] According to the vehicle described in claim 2, in addition to the effects of the vehicle described in claim 1, the weight is attached to the vehicle body using all the mounting frames provided for the pressurized evaporator, so that the load can be applied to the same mounting frame in both the mounting state of the pressurized evaporator and the mounting state of the weight. Therefore, the way in which the load is applied to the vehicle body can be made more approximate in each of these mounting states, which has the effect of making the strength design of the vehicle body easier.

[0009] The vehicle according to claim 3 provides the following effects in addition to those of the vehicle according to claim 2. The weight is formed in a rectangular parallelepiped shape by joining multiple beams. Since the horizontal beams extending in the left-right direction are fixed to the mounting frame at the same position as the pressurized evaporator, the load can be applied to the mounting frame at the same position in both the mounting state of the pressurized evaporator and the mounting state of the weight. Therefore, the strength design of the vehicle body can be made easier.

[0010] According to the vehicle described in claim 4, in addition to the effects of the vehicle described in claim 3, the crossbeam is bolted to the mounting frame at multiple locations in the left-right direction, so the weight can be easily removed from the mounting frame. Therefore, there is an effect that the weight can be easily replaced with a pressurized evaporator.

[0011] According to the vehicle described in claim 5, in addition to the effects of the vehicle described in claim 3, the crossbeams fixed to the mounting frame have higher rigidity than the other crossbeams that are not fixed to the mounting frame. Therefore, even if loads such as vibrations during vehicle operation act on the crossbeams, it is possible to suppress damage to the weights due to fatigue of the crossbeams.

[0012] The vehicle according to claim 6 provides the following effects in addition to those of the vehicle according to claim 2: Since the weight is attached to the vehicle body using all the mounting frames provided for the pressurized evaporator, the rigidity of the multiple mounting frames can be increased by the weight.

[0013] In this case, when a pair of side guards are provided on both the left and right sides of the vehicle body and fixed to both ends of multiple mounting frames, the mounting frames may bend due to vibrations during vehicle operation, for example. However, by adopting the structure of claim 6, it is possible to suppress the bending of the mounting frames due to vibrations during vehicle operation. Therefore, this has the effect of suppressing damage to the fixing (connection) portion between the mounting frame and the side guard.

[0014] The vehicle according to claim 7 provides the following effects in addition to those of the vehicle according to claim 6: The weight is formed in a rectangular parallelepiped shape by joining multiple beams, and the horizontal beams extending in the left-right direction are fixed to the mounting frame. Since the horizontal beams fixed to the mounting frame have higher rigidity than the other horizontal beams that are not fixed to the mounting frame, the rigidity of the multiple mounting frames can be effectively increased by the horizontal beams. As a result, deflection of the mounting frame due to vibrations during vehicle operation can be suppressed more effectively, and damage to the fixing (connection) part between the mounting frame and the side guard can be suppressed. [Brief explanation of the drawing]

[0015] [Figure 1] This is a side view of the vehicle in the case of the 1 / 2 model. [Figure 2] This is a partially enlarged cross-sectional view of a vehicle on line II-II in Figure 1. [Figure 3] Figure 2 is a partially enlarged cross-sectional view of the vehicle along line III-III. [Figure 4] This is a partially enlarged cross-sectional view of the vehicle along line IV-IV in Figure 1. [Figure 5] This is a perspective view of the weights. [Figure 6] This is a partially enlarged cross-sectional view of the vehicle, corresponding to Figure 2, showing the vehicle with the weight attached. [Figure 7] This is a partially enlarged cross-sectional view of the vehicle, corresponding to Figure 3, showing the vehicle with the weight attached. [Figure 8] This is a partially enlarged cross-sectional view of the vehicle, corresponding to Figure 4, showing the vehicle with the weight attached. [Modes for carrying out the invention]

[0016] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. First, the overall configuration of the vehicle 1 will be described with reference to Figure 1. Figure 1 is a side view of the vehicle 1 in one embodiment of the present invention.

[0017] As shown in FIG. 1, the vehicle 1 is a tank semi-trailer including a tractor 2 and a semi-trailer 3 towed by the tractor 2. The tractor 2 includes a plurality of wheels 20, and a chassis frame 21 extending in the front-rear direction (the left-right direction in FIG. 1) is supported by the wheels 20. A cab 22 configured as a driver's seat is disposed at the front end portion of the chassis frame 21, and the semi-trailer 3 is connected via a coupler 23 to the upper surface on the rear end side of the chassis frame 21.

[0018] The semi-trailer 3 includes a cylindrical tank 4 provided with a connection portion (not shown) to the coupler 23 on the lower surface. The tank 4 is filled with a load such as liquefied gas (e.g., LP gas). A sub-frame 40 extending in the front-rear direction is fixed to the lower surface of the tank 4, and the rear end portion of the sub-frame 40 is supported by a plurality of wheels 5.

[0019] Side guards 6 are provided on the side of the sub-frame 40 (outer side in the left-right direction). The side guards 6 are metal protection devices for preventing pedestrians and other vehicles from being caught under the sub-frame 40. The side guards 6 are composed of a plurality of support frames 60 arranged in the front-rear direction and pipes 61 supported by the plurality of support frames 60. A plurality (three in this embodiment) of pipes 61 are provided at intervals in the vertical direction, and the plurality of support frames 60 are connected to each other by the pipes 61 extending in the front-rear direction.

[0020] Although not shown in the drawings, the side guards 6 are provided in a pair (symmetrically left and right) on both sides in the left-right direction of the tank 4 (the direction perpendicular to the paper surface in FIG. 1), and a pressurized evaporator 7 is attached between the opposing sides of the pair of left and right side guards 6. The pressurized evaporator 7 is a device for evaporating and vaporizing the liquefied gas sent from the tank 4 through a delivery pipe (not shown) into vapor gas and returning the vapor gas to the tank 4. The attachment structure of this pressurized evaporator 7 will be described with reference to FIGS. 2 and 3. FIG. 2 is a partially enlarged cross-sectional view of the vehicle 1 taken along line II-II in FIG. 1, and FIG. 3 is a partially enlarged cross-sectional view of the vehicle 1 taken along line III-III in FIG. 2.

[0021] As shown in Figure 2, an upper mounting frame 8 is provided below the tank 4 to support the upper surface of the pressurized evaporator 7. The upper mounting frame 8 is fixed to the side of the subframe 40 and comprises a first frame 80 extending downward from the fixing portion, a second frame 81 extending left and right (left and right in Figure 2) from the lower end of the first frame 80, a third frame 82 extending upward from the left and right outer end (right side in Figure 1) of the second frame 81, and a fourth frame 83 connecting the upper ends of the third frame 82 and the first frame 80 left and right.

[0022] The second frame 81 extends from the lower end of the first frame 80 to both the left and right sides, and the pressurized evaporator 7 is mounted using this second frame 81. The pressurized evaporator 7 comprises a fixed beam 70 fixed to the lower surface of the second frame 81, a frame 71 supported by the second frame 81 via the fixed beam 70, and piping 72 housed inside the frame 71.

[0023] As shown in Figures 2 and 3, the second frame 81 is an L-shaped steel member, and the fixed beam 70 is fixed to the lower surface of the second frame 81 by bolts B1 and nuts N1. Specifically, the fixed beam 70 is a channel steel with a web extending in the left-right direction and a pair of flanges extending vertically from both ends of the web in the width direction (up-down direction in Figures 2 and 3), and one of the pair of flanges of the fixed beam 70 is fixed to the lower surface of the second frame 81. This fixing with bolts B1 and nuts N1 is performed at multiple locations in the left-right direction of the fixed beam 70 (see Figure 2).

[0024] Although Figure 3 shows the pressurized evaporator 7 mounted on two upper mounting frames 8 (second frames 81) arranged in the front-to-back direction (left-to-right direction in Figure 3), the pressurized evaporator 7 is mounted on three upper mounting frames 8 (second frames 81) arranged in the front-to-back direction. Specifically, the pressurized evaporator 7 is provided with three fixed beams 70 spaced apart in the front-to-back direction, and each of these three fixed beams 70 is fixed to the upper mounting frame 8 (second frames 81) by the mounting structure shown in the enlarged section of Figure 3.

[0025] A frame 71 is fixed to the lower surface of the fixed beam 70 (the other of the pair of flanges of the fixed beam 70), and the piping 72 inside this frame 71 has the same configuration as known piping. Furthermore, the suspension structure for the piping 72 relative to the fixed beam 70 is also the same as known configurations. Therefore, a detailed explanation of these configurations will be omitted, but examples of known piping structures include the inlet header 71, meandering pipe 72, and outlet header 73 described in Japanese Patent Application Publication No. 2023-044170, and examples of piping suspension structures include the suspension structure using the support member 74 and connecting rod 75 described in the same publication.

[0026] As described above, in this embodiment, the side guards 6 and pressurized evaporator 7 are attached to the subframe 40 (see Figure 2) via the upper mounting frame 8. The vehicle 1 has a symmetrical mounting structure for the side guards 6 and pressurized evaporator 7 using this upper mounting frame 8. Specifically, Figure 2 shows the portion of the second frame 81 of the upper mounting frame 8 located on the left side of the vehicle 1 (right side in Figure 2). A pair of left and right side guards 6 (support frames 60) are fixed to both ends of this second frame 81.

[0027] Furthermore, Figure 2 shows the pressurized evaporator 7 (fixed beam 70) with the portion located on the left side of the vehicle 1 fixed to the second frame 81 by five sets of bolts B1 and nuts N1. However, the pressurized evaporator 7 (fixed beam 70) is fixed to the second frame 81 by a total of 10 sets of bolts B1 and nuts N1 arranged on both the left and right sides.

[0028] Next, the mounting structure on the rear side of the pressurized evaporator 7 will be described with reference to Figure 4. Figure 4 is a partially enlarged cross-sectional view of vehicle 1 along the line IV-IV in Figure 1. Note that in Figure 4, only the main parts of vehicle 1 are shown in order to simplify the drawing, and some components (such as the upper mounting frame 8 shown in Figure 3) are omitted from the illustration.

[0029] As shown in Figure 4, the portion of the subframe 40 of the tank 4 located behind the upper mounting frame 8 (see Figures 2 and 3) described above is provided with rear mounting frames 9 and 10 that support the rear surface of the pressurized evaporator 7.

[0030] The rear mounting frame 9 is fixed to the left-right outer side (left side in Figure 4) of the subframe 40 and is an L-shaped frame in rear view, comprising a fixing portion 90 extending downward from the fixing portion and a fixed portion 91 extending outward in the left-right direction (left side in Figure 4) from the lower end of the fixing portion 90. The fixing portion 90 and the fixed portion 91 of the rear mounting frame 9 are connected by a reinforcing frame 11 that slopes downward toward the left-right outer side.

[0031] The rear mounting frame 10 is an L-shaped frame in rear view, comprising a fixing portion 100 fixed to the inner side (right side in Figure 4) of the fixing portion 90 of the rear mounting frame 9, and a fixed portion 101 extending inward in the left-right direction from the lower end of the fixing portion 100.

[0032] The rear mounting frames 9 and 10 are made of L-shaped steel, and the fixing parts 90 and 100 of these rear mounting frames 9 and 10 are connected to each other by welding or by bolts and nuts.

[0033] Although not shown in the diagram, the rear surface of the frame 71 of the pressurized evaporator 7 is provided with a crossbeam (a steel member extending to the left and right) that runs along the fixed parts 91 and 101 of the rear mounting frames 9 and 10. This crossbeam of the frame 71 is detachably fixed to the fixed parts 91 and 101 by eight bolts B2 arranged in the left-right direction (Figure 4 shows four bolts B2 on the left side of the vehicle 1).

[0034] On the other hand, by removing bolt B2, the pressurized evaporator 7 can be removed from the rear mounting frames 9 and 10. Also, by removing the aforementioned bolt B1 and nut N1 (see Figures 2 and 3), the pressurized evaporator 7 can be removed from the upper mounting frame 8.

[0035] In other words, in this embodiment, the user can choose whether or not to attach the pressurized evaporator 7 to the upper mounting frame 8 and the rear mounting frames 9, 10 (hereinafter collectively referred to as "each mounting frame 8 to 10") which are fixed to the vehicle body (subframe 40) of the vehicle 1, depending on the vehicle type (user).

[0036] Furthermore, if the pressurized evaporator 7 is not installed, a weight 12 (see Figure 5) is attached to the vehicle 1 in place of the pressurized evaporator 7 to suppress the increase in the vehicle's center of gravity. The configuration of this weight 12 will be explained with reference to Figure 5. Figure 5 is a perspective view of the weight 12. Note that the arrows UD, LR, and FB in Figure 5 indicate the vertical, horizontal, and longitudinal directions of the vehicle 1, respectively.

[0037] As shown in Figure 5, the weight 12 comprises upper crossbeams 120 and lower crossbeams 121 extending in the left-right direction (arrows LR direction), upper vertical beams 122 and lower vertical beams 123 extending in the front-back direction (arrows FB direction), and connecting beams 124 that connect these beams vertically (arrows UD direction). Each of these beams 120 to 124 is made of L-shaped steel.

[0038] The upper surface of the weight 12 is formed by the grid-like connection of the upper crossbeam 120 and the upper vertical beam 122, and the lower surface of the weight 12 is formed by the grid-like connection of the lower crossbeam 121 and the lower vertical beam 123. The connecting beam 124 connects the connection portion of the upper crossbeam 120 and the upper vertical beam 122 (i.e., the portion where the upper crossbeam 120 and the upper vertical beam 122 intersect) and the connection portion of the lower crossbeam 121 and the lower vertical beam 123 vertically.

[0039] Thus, the weight 12 is formed in a rectangular parallelepiped shape by joining the beams 120 to 124, and the mass of this weight 12 is equivalent to the mass of the pressurized evaporator 7. Equivalent means that the mass of the weight 12 is within ±10% of the mass of the pressurized evaporator 7.

[0040] Furthermore, the front-to-back and left-to-right dimensions of the rectangular weight 12 are approximately the same as those of the frame 71 of the pressurized evaporator 7. As a result, similar to the pressurized evaporator 7 described above, the weight 12 can be attached to the bottom of the tank 4 (Figure 6) using the mounting frames 8-10 (see Figures 2-4).

[0041] In Figure 5, of the multiple upper crossbeams 120 arranged in the front-to-back direction, the three beams fixed to the upper mounting frame 8 (see Figures 2 and 3) are labeled as upper crossbeams 120a, and the beam located between these three upper crossbeams 120a is labeled as upper crossbeam 120b.

[0042] Furthermore, the beam located below the upper crossbeam 120a is designated as the lower crossbeam 121a, and the beam connecting these upper and lower crossbeams 120a and 121a to each other is designated as the connecting beam 124a. Similarly, the beam located below the upper crossbeam 120b is designated as the lower crossbeam 121b, and the beam connecting these upper and lower crossbeams 120b and 121b to each other is designated as the connecting beam 124b.

[0043] Furthermore, a middle crossbeam 125 extending to the left and right is provided between the upper crossbeam 120 and the lower crossbeam 121 located at the rearmost end (arrow B side) of the weight 12. This middle crossbeam 125 is a beam fixed to the rear mounting frames 9 and 10 (see Figure 4) described above. A similar middle crossbeam (extending in the left and right direction) is also provided between the upper crossbeam 120 and the lower crossbeam 121 located at the frontmost end (arrow F side) of the weight 12 (see Figure 5).

[0044] Next, the mounting structure of the weights 12 to each mounting frame 8-10 will be described with reference to Figures 6-8. Figure 6 is a partially enlarged cross-sectional view of vehicle 1 showing the state in which the weights 12 are attached, corresponding to Figure 2. Figure 7 is a partially enlarged cross-sectional view of vehicle 1 showing the state in which the weights 12 are attached, corresponding to Figure 3. Figure 8 is a partially enlarged cross-sectional view of vehicle 1 showing the state in which the weights 12 are attached, corresponding to Figure 4.

[0045] As shown in Figures 6 and 7, the weight 12 is equipped with a fixed beam 126 having the same configuration as the fixed beam 70 of the pressurized evaporator 7 described above (see Figures 2 and 3). An upper crossbeam 120a (see Figure 7) is welded to the lower surface of this fixed beam 126, but the upper crossbeam 120a may be made detachable from the fixed beam 126 by bolts and nuts.

[0046] A fixing beam 126 for the weight 12 is secured to the lower surface of the second frame 81 of the upper mounting frame 8 by bolts B1 and nuts N1. This allows the weight 12 to be supported by the subframe 40 of the tank 4 (see Figure 6) via the upper mounting frame 8.

[0047] As shown in Figure 8, the intermediate crossbeam 125 provided on the rear surface of the weight 12 is fixed to the fixed portions 91 and 101 of the rear mounting frames 9 and 10 by bolts B2. In this way, the weight 12 is supported by the subframe 40 of the tank 4 via the rear mounting frames 9 and 10.

[0048] Thus, in this embodiment, it is possible to arbitrarily select between a state in which the pressurized evaporator 7 is attached to the body of the vehicle 1 (hereinafter referred to as the "state with pressurized evaporator 7 attached") and a state in which the weight 12 is attached (hereinafter referred to as the "state with weight 12 attached"). Since the mass of the weight 12 is the same as that of the pressurized evaporator 7, it is possible to suppress the raising of the center of gravity of the vehicle 1 when the weight 12 is attached. Therefore, the stability of the vehicle 1 during driving can be ensured.

[0049] Furthermore, since the weights 12 are attached to each of the multiple mounting frames 8-10 provided for the pressurized evaporator 7, the way the load is applied to the vehicle body (the position where the load is applied) can be approximated in each state of the pressurized evaporator 7 mounting and the state of the weights 12 mounting. Therefore, the strength design of the vehicle body can be made easier.

[0050] Furthermore, when the weight 12 is mounted, all of the mounting frames 8-10 provided for mounting the pressurized evaporator 7 are used, so the load can be applied to the same mounting frames 8-10 in both the mounting state of the pressurized evaporator 7 and the mounting state of the weight 12 (the mounting frames 8-10 on which the load is applied are made to be perfectly identical). Therefore, compared to, for example, mounting the weight 12 using only some of the frames 8-10, the way the load is applied to the vehicle body can be more approximated in the mounting state of the pressurized evaporator 7 and the mounting state of the weight 12.

[0051] As shown in Figures 6 and 7, the fixing beam 126 (upper cross beam 120a) of the weight 12 is fixed to the upper mounting frame 8 (second frame 81) by multiple bolts B1 and nuts N1 arranged in the left-right direction, similar to the pressurized evaporator 7. That is, the fixing beam 126 (upper cross beam 120a) of the weight 12 is fixed to the upper mounting frame 8 (second frame 81) at the same position as the fixing beam 70 of the pressurized evaporator 7. This allows the load to be applied to the multiple upper mounting frames 8 at the same position in both the mounting state of the pressurized evaporator 7 and the mounting state of the weight 12.

[0052] Furthermore, as shown in Figure 8, the central crossbeam 125 of the weight 12 is also fixed to the rear mounting frames 9 and 10 by multiple bolts B2 arranged in the left-right direction. The fixing position of the central crossbeam 125 to the rear mounting frames 9 and 10 is the same as the fixing position of the crossbeam on the rear surface of the pressurized evaporator 7 (the part fixed to the rear frames 9 and 10 in Figure 4). This allows the load to be applied to the rear mounting frames 9 and 10 at the same position in both the mounting state of the pressurized evaporator 7 and the mounting state of the weight 12.

[0053] Furthermore, since the fixed beam 126 (see Figures 6 and 7) and the intermediate cross beam 125 (see Figure 8) are fixed (bolted) to each mounting frame 8 to 10 by bolts B1 and B2, the weights 12 can be easily removed from each mounting frame 8 to 10, compared to, for example, if the fixed beam 126 and the intermediate cross beam 125 were welded to each mounting frame 8 to 10. Therefore, it is easy to switch from the weights 12 to the pressurized evaporator 7. The same applies when switching from the pressurized evaporator 7 to the weights 12.

[0054] Thus, in this embodiment, the same mounting frames 8-10 are used for both the mounting state of the pressurized evaporator 7 and the mounting state of the weight 12, and the fixing positions of the pressurized evaporator 7 and the fixing positions of the weight 12 on each mounting frame 8-10 are perfectly aligned. As a result, the way the load is applied to the vehicle body (each mounting frame 8-10) is almost identical depending on whether the pressurized evaporator 7 or the weight 12 is mounted. Therefore, the strength design of the vehicle body can be easily performed.

[0055] Here, the part of the weight 12 that is fixed to the upper mounting frame 8, that is, the upper crossbeam 120a (fixing beam 126) of the weight 12, is susceptible to loads due to vibrations during vehicle 1 operation. Therefore, in this embodiment, as shown in Figure 7, the rigidity of the upper crossbeam 120a attached to the upper mounting frame 8 (via the fixing beam 126) is set higher (the section modulus is larger) than the rigidity of the other upper crossbeams 120b. This makes it possible to suppress damage to the weight 12 due to fatigue of the upper crossbeam 120a, even if loads due to vibrations during vehicle 1 operation are repeatedly applied to the upper crossbeam 120a.

[0056] Furthermore, the connecting beam 124a connected to the upper crossbeam 120a is set to have higher rigidity than the connecting beam 124b connected to the upper crossbeam 120b. Similarly, the lower crossbeam 121a connected to the connecting beam 124a is also set to have higher rigidity than the lower crossbeam 121b. As a result, even if loads such as vibrations from the vehicle 1 in motion repeatedly act on the lower crossbeam 121a and the connecting beam 124a, it is possible to suppress the failure of the weight 12 due to fatigue of each of these beams 121a and 124a.

[0057] The load caused by vibrations during vehicle 1's operation also acts on the second frame 81 of the upper mounting frame 8, and this load can cause deformation such as bending in the second frame 81. As shown in Figure 6, the second frame 81 connects the left and right pair of side guards 6 (support frames 60), so if bending occurs in the second frame 81, the connection between the second frame 81 and the side guards 6 (support frames 60) becomes more susceptible to damage.

[0058] In contrast, as shown in Figure 3, when the pressurized evaporator 7 is installed, the pressurized evaporator 7 is fixed to a plurality of second frames 81 arranged in the front-to-back direction (the plurality of second frames 81 are connected to each other by the pressurized evaporator 7), so the rigidity of the second frames 81 can be increased by the pressurized evaporator 7. On the other hand, as shown in Figure 7, similarly when the weight 12 is installed, the weight 12 (fixed beam 126) is fixed to a plurality of second frames 81 arranged in the front-to-back direction, so the rigidity of the second frames 81 can be increased by the weight 12.

[0059] In particular, in this embodiment, the rigidity of the upper crossbeam 120a fixed to the second frame 81 (via the fixed beam 126) is higher than that of the other upper crossbeams 120b, thus more effectively ensuring the rigidity of the second frame 81. As a result, even when loads due to vibrations during vehicle 1 travel act on the second frame 81, deflection of the second frame 81 can be effectively suppressed. Therefore, damage to the connection between the second frame 81 and the side guard 6 (support frame 60) can be suppressed.

[0060] Although the present invention has been described above based on the above embodiments, it can be easily inferred that the present invention is not limited in any way to the above embodiments, and that various modifications and improvements are possible without departing from the spirit of the present invention.

[0061] In the above embodiment, a case was described in which one weight 12 is fixed to each mounting frame 8-10. However, the weight 12 may be divided into multiple parts in either the front-rear direction or the left-right direction, or multiple weights with a mass smaller than the weight 12 may be fixed to each mounting frame 8-10.

[0062] In the above embodiment, the case in which the weight 12 is attached to the vehicle body using all of the mounting frames 8 to 10 provided for the pressurized evaporator 7 has been described, but this is not necessarily the only case. For example, a configuration in which only some of the mounting frames 8 to 10 are used is also possible. As an example of such a configuration, a structure is given in which the weight 12 is attached using some or all of the multiple upper mounting frames 8 without using the rear mounting frame 10.

[0063] In the above embodiment, the case in which the weight 12 (fixing beam 126) is fixed to each mounting frame 8 to 10 by bolts B1 and B2 has been described, but this is not necessarily the only case. For example, the weight 12 (fixing beam 126) may be welded to each mounting frame 8 to 10. Alternatively, the fixing beam 126 may be omitted, and the upper crossbeam 120a may be directly fixed to the upper mounting frame 8 by bolts B1 and nuts N1 (or by welding).

[0064] Furthermore, although the above embodiment describes a case where the mounting position of the pressurized evaporator 7 and the mounting position of the weight 12 are the same for each mounting frame 8 to 10, their mounting positions may be different.

[0065] In the above embodiment, the case was described in which the rigidity of the three upper crossbeams 120a attached to the upper mounting frame 8 (via the fixed beam 126) is higher (the section modulus is larger) than the rigidity of the other upper crossbeams 120b. However, for example, the rigidity of each of the upper crossbeams 120a and 120b may be the same. The same applies to the lower crossbeams 121a and 121b and the connecting beams 124a and 124b.

[0066] In the above embodiment, the case in which the side guards 6 are fixed to both ends of the upper mounting frame 8 has been described, but the invention is not necessarily limited to this. For example, the weight 12 of the present invention can be applied to vehicles in which the side guards are not fixed to the frame for mounting the pressurized evaporator. An example of such a vehicle is the tank truck described in Japanese Patent Application Publication No. 2023-044170. Furthermore, the present invention may be applied to a tank trailer (full trailer) rather than a tank semi-trailer.

[0067] In the above embodiment, the case in which the weight 12 is formed in the shape of a rectangular parallelepiped by joining multiple beams 120 to 126 has been described, but it is not necessarily limited to this. For example, the weight 12 may be a polyhedron other than a rectangular parallelepiped (for example, a cube). Also, a configuration in which some of the beams 120 to 126 are omitted is also possible, for example, a configuration in which the weight 12 is formed only from the upper horizontal beam 120 and the upper vertical beam 122. In other words, as long as the mass of the weight 12 is equivalent to the mass of the pressurized evaporator 7, the number and shape of the beams of the weight 12, or the size of the weight 12 itself can be changed as appropriate. Also, each beam may be made of a combination of steel plates instead of structural steel.

[0068] In the above embodiment, the explanation of the fixing methods between some components, such as the connecting parts between each of the frames 80 to 83 of the upper mounting frame 8, and the fixing parts of the side guards 6 (support frames 60) to both ends of the second frame 81 (the sides of the third frame 82), has been omitted. Such fixing methods can be carried out using known means such as welding, bolts and nuts. [Explanation of Symbols]

[0069] 1 vehicle 4 tanks 40 Subframe (part of the vehicle body) 6 Side Guards 7. Pressurized evaporator 8. Upper mounting frame (mounting frame) 9,10 Rear mounting frame (mounting frame) 12 weights 120a Upper crossbeam (crossbeam fixed to the mounting frame) 120b Upper crossbeam (another crossbeam not fixed to the mounting frame)

Claims

1. A vehicle comprising a tank on which cargo is loaded, a vehicle body supporting the tank, and mounting frames fixed to the vehicle body and extending in the left-right direction, wherein pressurized evaporators can be attached to a plurality of the mounting frames arranged in the front-rear direction, A vehicle characterized in that it is possible to attach weights having the same mass as the pressurized evaporator to multiple mounting frames.

2. The vehicle according to claim 1, characterized in that the weight is attached to the vehicle body using all of the mounting frames provided for the pressurized evaporator.

3. The aforementioned weight is formed in a rectangular parallelepiped shape by joining multiple beams, The vehicle according to claim 2, characterized in that, among the plurality of beams, the horizontal beam extending in the left-right direction is fixed to the mounting frame at the same mounting position as the pressurized evaporator.

4. The vehicle according to claim 3, characterized in that the crossbeam is bolted to the mounting frame at multiple locations in the left-right direction.

5. The vehicle according to claim 3, characterized in that, among the plurality of crossbeams, the crossbeam fixed to the mounting frame has higher rigidity than the other crossbeams that are not fixed to the mounting frame.

6. The vehicle according to claim 2, characterized in that it is provided with a pair of side guards on both the left and right sides of the vehicle body and fixed to both ends of the plurality of mounting frames.

7. The aforementioned weight is formed in a rectangular parallelepiped shape by joining multiple beams, Of the multiple beams, the horizontal beams extending in the left-right direction are fixed to the mounting frame. The vehicle according to claim 6, characterized in that the crossbeam fixed to the mounting frame has higher rigidity than other crossbeams that are not fixed to the mounting frame.

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