JP2024021124A - tank lorry - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tank lorry which can simplify a construction of an involvement prevention device.

SOLUTION: An involvement prevention device 20 comprises: a plurality of attachment parts 21 and one or more protection parts 22. The plurality of attachment parts 21 extend outward in a lateral direction from a chassis frame 12 side, and are disposed spaced apart from each other in a longitudinal direction. The protection parts 22 each connect the plurality of attachment parts 21, extend toward both longitudinal sides with respect to an extraction pipe 40 and disposed on lateral outer sides of the extraction pipe 40. A discharge port 42 of a tip end of the extraction pipe 40 is positioned above the highest one of the protection parts 22. Thereby, a pipe or the like of ground side can be connected from the lateral outer side to the discharge port 42 without requiring any cut-out in the protection parts 22 of the involvement prevention device 20 in a position of the discharge port 42. Accordingly, a construction of the involvement prevention device 20 can be simplified in comparison with the case provided with some cut-outs in the protection part 22.

SELECTED DRAWING: Figure 3

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a tank lorry, and particularly to a tank lorry that can simplify the configuration of an entrainment prevention device when a take-out pipe is arranged inside the entrainment prevention device.

A tank truck is a vehicle in which a tank is supported on a chassis frame supported by a plurality of wheels. In the tank truck disclosed in Patent Document 1, a take-out pipe is arranged on the side of the vehicle, and a load inside the tank is discharged to the outside from a discharge port at the tip of the take-out pipe.

Furthermore, tank trucks must be equipped with an anti-entanglement device on the side of the vehicle to prevent other vehicles or pedestrians from getting caught in the wheels (particularly the rear wheels). The entanglement prevention device includes a plurality of attachment portions extending outward in the left-right direction from the chassis frame side, and a protection portion extending in the front-rear direction so as to connect the plurality of attachment portions.

Japanese Patent Application Publication No. 2010-111266

In the tank truck disclosed in Patent Document 1, the height of the protection part of the entrainment prevention device and the height of the discharge port are approximately the same, so that the position of the discharge port is adjusted so that ground-side piping, etc. can be connected to the discharge port. It was necessary to cut out (divide) the protective part of the entrapment prevention device. However, there is a need to simplify the configuration of the entrapment prevention device by eliminating the need for this notch.

The present invention has been made to meet the above-mentioned requirements, and an object of the present invention is to provide a tank lorry that can simplify the configuration of the entanglement prevention device.

To achieve this object, the tank lorry of the present invention includes a chassis frame supported by a plurality of wheels, a tank supported on the chassis frame, and a tank disposed outside the chassis frame in the left-right direction. It includes an extraction pipe for discharging the internal load to the outside from a discharge port at the tip, and an entrainment prevention device supported by the chassis frame, and the entrainment prevention device extends outward in the left-right direction from the chassis frame side. a plurality of mounting parts that extend and are spaced apart from each other in the front-back direction; and a plurality of mounting parts that connect the plurality of mounting parts, extend to both sides of the take-out pipe in the front-rear direction, and are arranged laterally outside of the take-out pipe. one or more protection parts, and the discharge port is located above the uppermost protection part.

Note that the tank and entrainment prevention device are supported by the chassis frame not only when they are directly supported by the chassis frame, but also when they are supported by the chassis frame through another member (for example, a subframe described below). Including cases where

According to the tank truck according to the first aspect, the entanglement prevention device supported by the chassis frame includes a plurality of attachment portions and one or more protection portions. The plurality of attachment parts extend outward in the left-right direction from the chassis frame side and are spaced apart from each other in the front-rear direction. The protection part connects the plurality of attachment parts, extends to both sides in the front and back direction with respect to the take-out pipe, and is disposed outside the take-out pipe in the left-right direction. The discharge port at the tip of the extraction pipe is located above the uppermost protection part. As a result, even if there is no notch in the protective part of the entrainment prevention device at the position of the discharge port (without dividing the protective part), it is possible to connect ground-side piping or the like to the discharge port from the outside in the left-right direction. Therefore, the configuration of the entrapment prevention device can be simplified compared to the case where a notch is provided in the protection part.

According to the tank lorry according to the second aspect, in addition to the effects provided by the tank lorry according to the first aspect, the following effects are achieved. The tank lorry includes a box body located inside the protection part of the entrainment prevention device in the left-right direction and in which the extraction pipe is housed. An opening provided on the outer surface of the box in the left-right direction is opened and closed by a door. Furthermore, since the opening is located above the uppermost protection part, even if there is no cutout in the protection part of the entrapment prevention device at the opening position, the door cannot be used as an entrapment prevention device when opening or closing. It can be made difficult to interfere with.

According to the tank lorry according to the third aspect, in addition to the effects provided by the tank lorry according to the second aspect, the following effects are achieved. The door opens by pivoting (rotating) downward of the box body around a rotation axis extending in the front-rear direction. Thereby, the door in the open state can be housed inside the protection part of the entrapment prevention device in the left-right direction, making it difficult for the door to interfere with equipment around the tank truck.

According to the tank lorry according to the fourth aspect, in addition to the effects provided by the tank lorry according to the third aspect, the following effects are achieved. When viewed in the front-rear direction, the door is formed in an arc shape centered on the rotation axis of the door. As a result, when the door is opened and closed, the door moves along an arc centered on the rotation axis, so it is possible to easily design a door to avoid interference between the door and surrounding members when the door is opened and closed.

It is a side view of a tank truck in one embodiment. FIG. 2 is a partially enlarged side view of the tank lorry, showing part II in FIG. 1; FIG. 2 is a partially enlarged cross-sectional view of the tank truck taken along line III-III in FIG. 1. FIG.

Hereinafter, preferred embodiments will be described with reference to the accompanying drawings. First, with reference to FIG. 1, the overall configuration of the tank truck 10 will be described. FIG. 1 is a side view of a tank truck 10 in one embodiment.

As shown in FIG. 1, the tank truck 10 includes a plurality of front wheels 11a and a plurality of rear wheels 11b, and is configured as a vehicle for transporting liquefied gas (for example, LNG or LPG) as a load. Note that the load may be a liquid, solid, or gas other than liquefied gas.

The front wheel 11a is a wheel provided on the front side of the vehicle (left side in FIG. 1), and in this embodiment is configured with one shaft. The rear wheel 11b is a wheel provided on the rear side of the vehicle (right side in FIG. 1), and in this embodiment is configured with two axles. A chassis frame 12 forming the framework of the vehicle body is supported by the plurality of front wheels 11a and rear wheels 11b.

The chassis frame 12 is a frame that extends in the front-rear direction of the vehicle body and is wide in the left-right direction. A cab 13 configured as a driver's seat is arranged above the front wheels 11a and at the front end of the chassis frame 12. A tank 15 is supported (mounted) on a chassis frame 12 located on the rear side of the cab 13 via a pair of left and right subframes 14 .

The tank 15 is a cylindrical tank for loading liquefied gas. Before the tank 15 is supported on the chassis frame 12 (before installation), the subframe 14 is joined (directly fixed) to the tank 15 by welding or the like. A rubber liner 16 (see FIG. 3) is sandwiched between the chassis frame 12 and the sub-frame 14, and the sub-frame 14 is fixed to the chassis frame 12 using fixing devices (not shown) or welding. is mounted.

An anti-entanglement device 20 and a box body 30 are attached to the tank lorry 10 on the left-right outer side of the chassis frame 12 between the front wheels 11a and the rear wheels 11b. The entanglement prevention device 20 and the box body 30 will be explained with reference to FIGS. 2 and 3.

FIG. 2 is a partially enlarged side view of the tank truck 10, which is an enlarged view of portion II in FIG. FIG. 3 is a partially enlarged sectional view of the tank truck 10 taken along line III-III in FIG. In addition, in FIG. 3, a part of the left side of the tank truck 10 is shown. The tank truck 10 is provided with entrainment prevention devices 20 symmetrically, and a box 30 and a take-out pipe 40 housed inside the box 30 are provided only on the left side.

The entrapment prevention device 20 is a protection device for making it difficult for other vehicles, pedestrians, etc. to get entangled in the rear wheel 11b, and extends to both sides of the box body 30 in the front and rear directions. Note that the shape, strength, position, etc. of the entrapment prevention device 20 are determined by law.

The entrapment prevention device 20 includes a plurality of attachment parts 21 arranged apart from each other in the front-rear direction, and a plurality of (three in this embodiment) protection parts 22 that connect the plurality of attachment parts 21 to each other. . The plurality of attachment portions 21 are portions for supporting (mounting) the entanglement prevention device 20 on the chassis frame 12, and one or more attachment portions are arranged on each side of the box body 30 in the front and rear directions.

Each attachment portion 21 includes a first portion 21a, a second portion 21b, and a third portion 21c. The first portion 21a is a round pipe-shaped portion having one end fixed to the subframe 14 and extending outward in the left-right direction and downward from the one end toward the other end. The entanglement prevention device 20 is supported by the chassis frame 12 via the subframe 14 by the first portion 21a.

The second portion 21b is a round pipe-shaped portion that extends downward from the other end of the first portion 21a so as to be perpendicular (substantially vertical) to the road surface and the chassis frame 12. The first part 21a and the second part 21b are integrally formed by bending a single round pipe into a dogleg shape.

The third part 21c is an L-shaped part formed by a substantially vertical vertical bar fixed to the chassis frame 12 and a substantially horizontal horizontal bar connecting the lower end of the vertical bar and the second part 21b. . This third portion 21c can improve the strength of the entrainment prevention device 20 against loads in the left and right directions.

The protection portion 22 is a round bar-shaped portion extending in the front-rear direction so as to connect the second portions 21b of the plurality of attachment portions 21, and is fixed to the outer side in the left-right direction of the second portions 21b. The plurality of protection parts 22 are arranged substantially horizontally while being spaced apart from each other in the vertical direction. Further, the end portion of the protection portion 22 is curved inward in the left-right direction to protect the contact partner.

Although not shown, this protection part 22 is arranged on the left-right direction outer side of the straight line connecting the outermost front wheel 11a and the rear wheel 11b when viewed in the vertical direction. This makes it difficult for pedestrians to enter the inside of the protection part 22 in the left-right direction, and prevents them from getting caught in the rear wheel 11b. Moreover, the protection part 22 extends both forward and backward with respect to the box body 30 and the extraction pipe 40, and is disposed on the left and right outer sides thereof, thereby making it difficult for pedestrians and the like to come into contact with the box body 30.

The box body 30 is a storage box that accommodates an extraction pipe 40 for discharging liquefied gas from the tank 15 and protects the extraction pipe 40 from external shocks and the like. In the box body 30, an opening 31 provided on the outer side in the left-right direction is opened and closed by a door 32. By opening this door 32, the extraction piping 40 can be operated or used.

The box body 30 is attached to the subframe 14 and the tank 15 via brackets (not shown). Here, when attaching the box body 30 to the chassis frame 12, the position at which the box body 30 can be attached differs depending on the type (manufacturer) of the chassis frame 12, making the design time-consuming. On the other hand, by attaching the box body 30 to the subframe 14 or the tank 15, this design effort can be saved.

Moreover, the opening 31 of the box 30 is located above the uppermost protection part 22. As a result, even if there is no notch in the protection part 22 of the entrapment prevention device 20 at the position of the opening 31 (even if the protection part 22 is not separated), the door 32 can be moved between the entrapment prevention device 20 and the entrapment prevention device 20 when the door 32 is opened and closed. can be made difficult to interfere with. Therefore, the configuration of the entrainment prevention device 20 can be simplified compared to the case where a notch is provided.

The door 32 opens by pivoting (rotating) downward of the box body 30 around a rotation shaft 33 extending in the front-rear direction. The door 32 in this open state is shown in FIG. 3 by a two-dot chain line. Since the door 32 in an open state can be accommodated inside the protection part 22 in the left-right direction, the door 32 can be prevented from interfering with equipment around the tank truck 10.

The door 32 is formed in an arc shape centered on the rotating shaft 33 when viewed in the front-rear direction. As a result, when the door 32 is opened and closed, the door 32 moves along an arc centered on the rotating shaft 33, so it is possible to easily design the door 32 to avoid interference with surrounding members when the door 32 is opened and closed.

Moreover, not only the opening 31 but the entire box 30 is located above the uppermost protection part 22. Compared to the conventional case in which the box 30 is located at approximately the same height as the protective part 22, the box 30 has been moved upward to avoid the protective part 22, so a space is created below the box 30. There is. Since the open door 32 is accommodated in this space, the space can be used effectively. Furthermore, when the door 32 is rotated, the amount of downward protrusion of the door 32 from the box body 30 can be made smaller when the door 32 is rotated compared to when the door 32 is lowered straight down.

As described above, the extraction pipe 40 is a pipe for discharging the liquefied gas from the tank 15 to the outside, and is disposed outside the chassis frame 12 in the left-right direction and inside the box body 30. The extraction pipe 40 includes a pipe seat 41a, an internal tank pipe 41b, a discharge port 42, an emergency shutoff valve 43, a manual on-off valve 44, and a bent pipe 45. A discharge port 42 for discharging liquefied gas faces outward in the left-right direction.

The tube seat 41a is connected above the subframe 14 in the tank 15. Specifically, when the bottom of the wall surface of the cylindrical tank 15 is set at 0 degrees when viewed in the front-rear direction, the tube seat 41a is connected to the wall surface at a position of 45 degrees.

The in-tank pipe 41b is a part that sends the liquefied gas inside the tank 15 to the extraction pipe 40, and is formed in a substantially U-shape. A tube seat 41a is attached to one end of the tank internal piping 41b. The other end of the in-tank pipe 41b is located at the bottom of the wall of the tank 15. Thereby, even if the tube seat 41a is connected to the wall surface of the tank 15 above the subframe 14, the liquefied gas accumulated at the bottom of the tank 15 can be sent to the extraction pipe 40.

The emergency shutoff valve 43 is a valve that closes in the event of an abnormality such as an earthquake to prevent the inflow and outflow of liquefied gas, etc., and is connected to the side of the pipe seat 41a opposite to the tank internal pipe 41b (discharge port 42 side). Ru. Commercially available emergency shutoff valves 43 include those bent at 90° and those bent at 45° relative to the straight pipe.

In this embodiment, a commercially available emergency shutoff valve 43 bent at 90 degrees is used, and the discharge port 42 side of the emergency shutoff valve 43 facing inward and downward in the left-right direction and the manual on-off valve 44 are connected at 135 degrees with respect to the straight pipe. They are connected by a bent pipe 45. Thereby, even if the tube seat 41a is connected to the wall surface of the tank 15 above the sub-frame 14 and the discharge port 42 is directed outward in the left-right direction, the extraction pipe 40 can be housed compactly inward in the left-right direction. As a result, the extraction pipe 40 and the box body 30 can be housed inside the protection part 22 in the left-right direction. In addition, by using a commercially available emergency shutoff valve 43, the manufacturing cost of the tank lorry 10 can be more easily reduced than when using a custom-made product.

The discharge port 42 is a part for discharging the liquefied gas that has passed through the extraction pipe 40 from inside the tank 15 to the outside. As a specific discharge method, first, the tank truck 10 is stopped, a worker opens the door 32 of the box body 30, and exposes the discharge port 42 of the extraction pipe 40 to the outside through the opening 31. Next, a ground-side piping (for example, a loading arm) or the like is connected to the discharge port 42, and a manual opening/closing valve 44 is opened by an operator, so that the liquefied gas is discharged from the discharge port 42 to the ground-side pipe.

The discharge port 42 is located above the uppermost protection part 22. Thereby, even if there is no notch in the protection part 22 of the entrainment prevention device 20 at the position of the discharge port 42, ground-side piping or the like can be connected to the discharge port 42 from the outside in the left-right direction. Therefore, the configuration of the entrainment prevention device 20 can be simplified compared to the case where a notch is provided.

Moreover, the uppermost protection part 22 must have a height of 650 mm or more from the road surface according to the law. Therefore, the discharge port 42 and the manual on-off valve 44 arranged above the protection part 22 often have a height of about 1 m from the road surface. As a result, an adult standing on the road can perform the work of connecting the ground-side piping to the discharge port 42 and the work of opening and closing the manual on-off valve 44 in a comfortable position without bending the waist.

Although the present invention has been described above based on the above embodiments, the present invention is not limited to the above embodiments, and it is readily understood that various modifications and improvements can be made without departing from the spirit of the present invention. This can be inferred. For example, the tank 15 is not limited to a cylindrical shape, but may be an elliptical cylinder or a rectangular cylinder.

In the embodiment described above, a case has been described in which the front wheel 11a of the tank lorry 10 has one axle and the rear wheel 11b has two axles, but the present invention is not limited to this. For example, the front wheels 11a may have two or more axles, and the rear wheels 11b may have one or more axles.

Further, the plurality of axes of the rear wheel 11b may be largely separated in the front-rear direction. However, in this case, it is necessary to arrange the entanglement prevention device 20 also between the rear wheels 11b which are far apart. Furthermore, a box 30 and an extraction pipe 40 may be provided between the rear wheels 11b. Moreover, the entrainment prevention device 20, the box body 30, and the extraction pipe 40 may be provided behind the rearmost rear wheel 11b.

In the above embodiment, a case has been described in which the entanglement prevention device 20 is fixed to the subframe 14 by the first part 21a of the mounting part 21 and fixed to the chassis frame 12 by the third part 21c, but the invention is not limited to this. . For example, the entrainment prevention device 20 may be fixed only to the subframe 14 or only to the chassis frame 12 by changing the shape of the attachment portion 21 as appropriate. Further, the entanglement prevention device 20 may be fixed only to the tank 15, or to the tank 15 and the chassis frame 12 or subframe 14.

Similarly, the box 30 may be fixed to only one of the tank 15, the chassis frame 12, and the subframe 14, or may be fixed to a plurality of them. Further, a fixing bracket may or may not be interposed between them. Furthermore, the box body 30 and the extraction pipe 40 may be provided only on the right side of the tank truck 10, or may be provided on both the left and right sides. A plurality of box bodies 30 and extraction pipes 40 may be provided in the front-rear direction.

In the embodiment described above, a case has been described in which the protection part 22 of the entrapment prevention device 20 has a round bar shape, but the protection part 22 is not limited to this. For example, the protection part 22 may be formed into a bar shape such as a square bar or a pipe other than a round bar, or may be formed into a plate shape. Among the plurality of protection parts 22, plate-shaped and rod-shaped protection parts may be mixed.

Further, the number of protection parts 22 may be changed as appropriate. For example, only one wide (large vertical dimension) plate-shaped protective portion 22 may be used. In this case, the second part 21b of the attachment part 21 may be omitted, and the first part 21a and the third part 21c may be directly fixed to the protection part 22. Further, depending on the size of the vehicle, only one rod-shaped protection portion 22 may be used. The plurality of protection parts 22 may be formed in a net shape by crossing each other.

In the above embodiment, a case has been described in which the door 32 of the box 30 is opened by rotating downward of the box 30 around the rotating shaft 33, but the door 32 is not limited to this. The door 32 may be opened by rotating it in the left-right direction of the box body 30 (the longitudinal direction of the vehicle). In this case, the door 32 may be opened on one side or on both sides (double door). Alternatively, the door 32 may be opened by rotating upward. The door 32 may be configured to be opened by sliding it in at least one of the up, down, left, and right directions. The door 32 may be configured to break while being opened.

In the above embodiment, the tank lorry 10 has been described in which the cab 13 is arranged at the front end portion of the chassis frame 12 on which the tank 15 is supported, and the tank 15 and the cab 13 are not separated. On the other hand, the present invention may be applied to a trailer-type tank truck in which the tank 15 and the cab 13 can be separated. The trailer portion on which the tank 15 is supported may be a semi-trailer that does not have front wheels and can stand on its own by deploying auxiliary legs, or it may be a full trailer that has a plurality of wheels that can stand on its own.

In the above embodiment, a case has been described in which the entire box 30 is located above the uppermost protection part 22, but the present invention is not limited to this. For example, if the opening 31 of the box 30 is located above the uppermost protection part 22, a part of the box 30 may be located below the protection part 22.

10 Tank truck 11a Front wheel (wheel)
11b Rear wheel (wheel)
12 Chassis frame 15 Tank 20 Entrainment prevention device 21 Mounting part 22 Protective part 30 Box body 31 Opening part 32 Door 33 Rotating shaft 40 Output piping 42 Discharge port

Claims (4)

a chassis frame supported by a plurality of wheels;
a tank supported on the chassis frame;
an extraction pipe disposed outside the chassis frame in the left-right direction and discharging the loaded material inside the tank to the outside from a discharge port at the tip;
an entanglement prevention device supported by the chassis frame,
The entanglement prevention device includes a plurality of attachment portions that extend outward from the chassis frame side in the left-right direction and are spaced apart from each other in the front-rear direction;
one or more protection parts connecting the plurality of attachment parts, extending to both sides in the front-rear direction with respect to the take-out pipe, and disposed outside the take-out pipe in the left-right direction;
A tank lorry, wherein the discharge port is located above the uppermost protection part. a box body located inside the protection part in the left-right direction and housing the extraction pipe;
The box has an opening on the outer side in the left and right direction that can be opened and closed by a door.
The tank lorry according to claim 1, wherein the opening is located above the uppermost protection part. 3. The tank lorry according to claim 2, wherein the door opens by rotating downwardly of the box body about a rotation axis extending in the front-rear direction. 4. The tank lorry according to claim 3, wherein the door is formed in an arc shape centered on the rotation axis when viewed in the front-rear direction.

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