JP2005119326A - Sub-frame structure for tank car - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide, firstly, a sub-frame structure for a tank car enlarging accessory mounting space, securing mounting space for piping, wiring and the like, and improving mounting properties thereof, secondly, reducing manufacturing and construction man hour of a reinforcement bracket, and thirdly, reducing weight and increasing strength. <P>SOLUTION: In this sub-frame structure for a tank car such as a tank lorry having a tank 6 mounted on a chassis frame 11 via a sub-frame 12, the sub-frame 12 which is a cradle of the tank 6 has a pair of left and right single piece structure and is provided with a reinforcement bracket 14. The reinforcement bracket 14 consists of one piece extrusion material and is provided with a hollow space 15 penetrating in fore-and-aft direction and formed in vertically multi-stages, and the plurality of the brackets are formed in the fore-and-aft direction. The side of the reinforcement bracket 14 is attached to a back surface D of the sub-frame 12 by welding or the like, and the top surface of the bracket 14 is attached to a bottom surface of the tank 6 together with the sub-frame 12 by welding or the like. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a subframe structure for a tanker vehicle. That is, it relates to the structure of a subframe used as a tank cradle in a tank truck or other tank trucks.

<Conventional technology>
In tank trucks and other tank trucks, a tank is mounted on a chassis frame via a subframe. And the sub-frame which is a cradle for the tank is composed of a pair of left and right ones and is often provided with a reinforcing bracket.
As prior art document information of this type of conventional example of a tank truck having a left and right subframe structure, for example, the information shown in the following Patent Document 1 can be cited.
3 (1), 3 (2), and 4 (1), 2 (2) are used to explain a reinforcing bracket of this type of conventional example. FIG. 3 (1) is a front sectional view of the main part of the reinforcing bracket and the like, and FIG. 3 (2) is a perspective view of the reinforcing bracket. 4A is a rear view, and FIG. 4B is a side view.

Now, as shown in FIGS. 3A, 3B, etc., this type of conventional reinforcing bracket 1 has a substantially box shape with a U-shaped cross section. That is, the reinforcing bracket 1 of this type of conventional example is manufactured by cutting, bending, and welding a sheet metal processed sheet material, and three vertical sheet materials composed of a side plate 2, a front plate 3, and a rear plate 4 are combined. It was in the shape of a box that was welded in a letter shape.
Further, as shown in FIGS. 4 (1), (2), etc., a plurality of such reinforcing brackets 1 are used in the front-rear direction, and are shown in FIG. 3 (1), etc. As described above, they are fixedly and integrally attached to the back surface A of the subframe 5 and the bottom surface of the tank 6, respectively.
In other words, the reinforcing bracket 1 is fixedly and integrally attached to the back surface A of the subframe 5 by welding or the like, with the vertical side edges, which are free ends of the front plate 3 and the rear plate 4, The upper side edges of the side plates 2, the front plate 3, and the rear plate 4 were fixedly and integrally attached to the bottom surface of the tank 6 by welding or the like.
In FIG. 3A, reference numeral 7 denotes a reinforcing cloth, and the reinforcing bracket 1 is attached to the bottom surface of the tank 6 via the reinforcing cloth 7 in the illustrated example.

By the way, the following problems have been pointed out with respect to the reinforcing bracket 1 of the subframe 5 of such a conventional example.
<About the first problem>
First, problems have been pointed out regarding the installation space for accessories, piping, wiring, and the like. In this type of tank car, an accessory 9 which is an exterior part such as a side bumper 8, a tool box, and an operation box is attached to the surface B side of the subframe 5, and a hose and a cord are attached to the back surface A side of the subframe 5. , Other piping, wiring, and the like are arranged, but the reinforcing bracket 1 of this type of conventional example has hindered the mounting thereof. In FIG. 3A, reference numeral 11 denotes a chassis frame.
That is, first, with respect to the subframe 5, the portion where the reinforcing bracket 1 is attached to the back surface A side is a dead space sealed in a substantially box shape by the reinforcing bracket 1, and the side bumper 8, Accessories 9 such as a tool box and an operation box could not be attached. At the location where the reinforcing bracket 1 is attached, the back surface A side of the sub-frame 5 becomes a dead space, and the accessory 9 and the mounting bracket cannot be attached to the front surface B side because, for example, the bolt and nut cannot be fixed.
Thus, the presence of the reinforcing bracket 1 on the back surface A of the subframe 5 makes it difficult to secure the mounting space for the accessory 9, restricts the mounting position of the accessory 9, and impairs the degree of freedom of mounting the accessory 9. It was pointed out that the problem was.

Further, with respect to the back surface A of the subframe 5, since the portion where the reinforcing bracket 1 is attached in this way becomes a dead space sealed in a substantially box shape, it is difficult to attach and route piping, wiring, and the like. It was.
That is, on the back surface A of the subframe 5, it is difficult to secure a mounting space for piping, wiring, etc. at the location of the sealed substantially box-shaped reinforcing bracket 1, and piping, wiring, etc. cannot be passed. However, piping, wiring, etc. are forced to bypass the outside of the reinforcing bracket 1 while avoiding it, and it has been pointed out that piping processing, wiring processing, etc. are not easy.

About the second problem
Secondly, a problem has also been pointed out in the number of steps for manufacturing the reinforcing bracket 1 itself. First, this type of conventional reinforcing bracket 1 is assembled by cutting, bending, and welding three plate members, that is, side plates 2, front plates 3, and rear plates 4, and has many parts and many welds. .
Further, when the reinforcing bracket 1 is constructed, it is necessary to weld the side edge and upper edge of the side plate 2, the front plate 3, and the rear plate 4 to the back surface A of the subframe 5 and the bottom surface of the tank 6. This is a detailed work in a narrow area.
As described above, the conventional reinforcing bracket 1 of this type has a number of problems in the number of manufacturing and construction man-hours, such as many parts and welded parts, troublesome and time-consuming assembly and manufacturing, and difficult construction. It was.

<< About the third problem >>
Third, problems have been pointed out in terms of weight and strength. That is, the reinforcing bracket 1 of this type of conventional example is composed of side plates 2, front plates 3, and rear plates 4, that is, sheet metal, three plates that are cut and welded.
Therefore, the reinforcement bracket 1 has been pointed out that the strength is uneasy. In addition, it has been pointed out that the entire structure is of the same thickness / thickness and is heavy.
Further, the reinforcing bracket 1 has the side plate 2, the front plate 3, and the rear plate 4 welded to the bottom surface of the tank 6 to hold the tank 6 as a cradle. From this aspect, there is a problem in terms of strength, for example, there is a concern that stress concentration on the tank 6 is concerned.

<< About the present invention >>
In view of such a situation, the sub-frame structure of the tank vehicle of the present invention has been made to solve the problems of the conventional example. In addition, a reinforcing bracket having a plurality of hollow spaces is adopted, which is made of an integrally molded mold material.
Therefore, according to the present invention, firstly, the mounting space for accessories is expanded, the mounting space for piping, wiring, etc. is secured, and these mounting properties are improved, and secondly, the number of steps for manufacturing the reinforcing bracket is reduced. Thirdly, an object of the present invention is to propose a subframe structure for a tanker vehicle that is reduced in weight and improved in strength.

<About Claim>
The technical means of the present invention for solving such a problem is as follows. First, claim 1 is as follows.
The sub-frame structure of a tank vehicle according to claim 1 is a tank vehicle such as a tank truck or a granular material transport vehicle in which a tank is mounted on a chassis frame via a sub-frame, and the sub-frame is a cradle for the tank. Is composed of a pair of left and right structures, and is provided with a reinforcing bracket. The reinforcing bracket is made of an integrally molded mold material and has a plurality of hollow spaces.

About Claim 2, it is as follows. A sub-frame structure for a tank vehicle according to a second aspect is the tank frame according to the first aspect, wherein the reinforcing bracket is made of metal and is molded into a vertically elongated block shape, and a plurality of them are used in the front-rear direction.
And on the side, it is fixedly and integrally attached to the back surface of the metal subframe with welding or bolts and nuts, and on the top surface, welded with the subframe to the bottom surface of the metal tank. The hollow space is fixed and integrated with a bolt and a nut, and the hollow space is formed in multiple stages in the vertical direction while penetrating in the front-rear direction.
About Claim 3, it is as follows. The sub-frame structure of the tank car according to claim 3 is the sub-frame structure according to claim 2, wherein accessories such as a side bumper, a tool box, and an operation box are attached to the surface side of the sub-frame, , Piping, wiring, etc. are arranged.

<< About action >>
Since the sub-frame structure of the tank car according to the present invention is as described above, it is as follows.
(1) In a tank car, a tank is mounted on a chassis frame via a subframe. The subframe has a pair of left and right structures, and includes a plurality of reinforcing brackets.
(2) This reinforcing bracket is made of an integrally molded mold material, and includes hollow spaces formed in multiple stages in the vertical direction while penetrating in the front-rear direction. Then, it is fixedly and integrally attached to the back surface of the subframe on the side surface and to the bottom surface of the tank on the top surface by welding or bolts and nuts, respectively.

(3) In tank trucks, a reinforcing bracket is attached to the back side of the subframe, and accessories are attached to the front side. Accessories can also be attached to the front side of places where the reinforcing bracket is attached to the back side. Therefore, the attachment position of the accessory is not restricted by the reinforcing bracket.
In other words, the reinforcing bracket can be attached with bolts and nuts or the like via the subframe by utilizing the hollow space.
(4) In tank trucks, a reinforcing bracket is attached to the back of the subframe and piping and wiring are arranged. However, a mounting space for piping and wiring is also secured at the location where the reinforcing bracket is attached. The
That is, the reinforcing bracket can pass through the piping, wiring, and the like by using the hollow space.

(5) Further, the reinforcing bracket can be easily manufactured without a welded portion by molding.
(6) The required number of the reinforcing brackets can be easily obtained by cutting a continuous integrally molded product produced in advance during construction. The obtained reinforcing bracket can be attached to the back surface of the subframe or the bottom surface of the tank on the side surface or top surface.
(7) Since the reinforcing bracket is made of a mold material that is integrally formed with a hollow space, it is lightweight in shape. Further, it is possible to easily reduce the weight by reducing the thickness of the portion where the strength requirement is low by molding.
(8) Since this reinforcing bracket is made of an integrally block-shaped mold material that is hollowed out, it is excellent in strength in terms of shape. The top surface of the reinforcing bracket is attached to the bottom of the tank to hold the tank. However, since the tank receives the tank load, the stress concentration on the tank is dispersed and alleviated. Yes.

<Features of the present invention>
As described above, the sub-frame structure of the tanker vehicle according to the present invention is characterized by adopting a reinforcing bracket having a plurality of hollow spaces, which is made of an integrally molded mold material.
Therefore, the present invention exhibits the following effects.

<< First effect >>
First, the mounting space for accessories is expanded, and mounting space for piping, wiring, etc. is secured, and these mounting properties are improved.
That is, in the sub-frame structure of the present invention, the portion of the sub-frame where the reinforcing bracket is attached to the back side is also attached to the front side by, for example, bolting and nut fastening using the hollow space. Can be easily installed. Unlike the reinforcing bracket of this type of conventional example described above, it has a substantially box-like shape that is hermetically closed, and does not become a dead space, so that the bolts and nuts are not disabled.
Accordingly, the attachment space for the accessory is freely expanded and the degree of freedom of the attachment position is improved, so that various attachment position requests desired by the user can be easily accommodated.

Moreover, in the sub-frame structure of the present invention, a mounting space for piping, wiring, etc. is secured even at a location where the reinforcing bracket is attached on the back side of the sub-frame.
That is, this reinforcing bracket can pass piping, wiring, etc. using the hollow space. Like the above-mentioned conventional bracket of this kind, it becomes a dead space sealed in a box shape, and it does not make it difficult to install and route piping, wiring, etc., and it can be forced to bypass. Disappear.

<< Second effect >>
Secondly, the number of manufacturing and manufacturing steps for the reinforcing bracket is reduced. That is, since the subframe structure of the present invention employs a reinforcing bracket made of an integrally molded mold material, its manufacture is simple and easy, and the number of parts and welding locations are the same as those of this type of conventional reinforcing bracket. In many cases, it does not take time for assembly production.
Further, in the construction, a plurality of necessary reinforcing brackets can be obtained by cutting the molded product obtained continuously. And it attaches to a sub-frame back surface or a tank bottom face by a side surface or a top surface. As in the case of the above-described conventional reinforcing bracket, compared to the case where it is attached by a line such as a side edge or an upper edge, the construction is easy in terms of the amount attached to the surface. Despite installation work in a narrow space under the tank, construction is easy.

《Third effect》
Third, weight is reduced and strength is improved. That is, the sub-frame structure of the present invention employs a reinforcing bracket of a mold material that is integrally formed with a hollow space, so that it is compared with the conventional reinforcing bracket of this type in which three plates are welded. , Weight is reduced.
This type of conventional reinforcing bracket has the same thickness and thickness structure of three sheets of sheet metal, cut and welded, but it is also easy to reduce the thickness of the part where the strength requirement is low .
In addition, this reinforcing bracket is superior in strength in terms of shape as compared with the above-described conventional reinforcing bracket. Furthermore, since the top surface of this reinforcing bracket is attached to the bottom of the tank, that is, as with the conventional reinforcing bracket, the tank load is received by the upper edge, that is, not by the line, so the stress concentration on the tank is dispersed. Alleviated.
As described above, the effects exerted by the present invention are remarkably large, such as all the problems existing in this type of conventional example are solved.

《About drawing》
Hereinafter, the sub-frame structure of the tank vehicle of the present invention will be described in detail based on the best mode for carrying out the invention shown in the drawings. 1 and 2 serve to explain the best mode for carrying out the present invention.
FIG. 1A is a front sectional view of the main part of the reinforcing bracket and the like, and FIG. 2B is a perspective view of the reinforcing bracket. 2A is a rear view, FIG. 2B is a side view, and FIG. 3C is an enlarged view of the main part of FIG.
FIG. 4 (3) is a side view of the tank truck.

《Overview of tank car》
First, the tank truck 10, the granular material transport vehicle, the water supply vehicle, the fire tank vehicle, and other tank vehicles will be described with reference to FIG.
In the illustrated tank truck 10 and other tank trucks, the tank 6 is mounted on the chassis frame 11 via the subframe 12. That is, the chassis frame 11 that is a metal chassis is held on the axle, and the metal subframe 12 that is a cradle for the tank 6 is held on the chassis frame 11.
The tank 6 held on the sub-frame 12 is made of a metal such as aluminum or stainless steel, and has a circular cross-section with a round, oval, or other shape with the front and rear closed. A loading manhole and the like are attached to the top of the tank 6, and a bottom valve and a discharge port for unloading are attached to the bottom. In the case of the tank lorry 10, the tank 6 is partitioned into a plurality of tank chambers by a partition plate, and a manhole and a bottom valve are attached to each tank chamber.
In the case of the tank lorry 10, gasoline, light oil, kerosene, and other oils are loaded in the tank 6, and in the case of a granular material transporter, loosely spread cement, wheat flour, and other powders Granules are loaded.

Now, in such a tank lorry 10, a granular material transport vehicle, and other tank vehicles, accessories such as a side bumper 8, a tool box, and an operation box 13 are provided on the surface C side / outside of the subframe 12 below the tank 6. 9 is attached, and piping, wiring, and the like are arranged on the back surface D side / inside of the subframe 12.
That is, in the case of the tank lorry 10, the bottom valve on the bottom of each tank chamber of the tank 6 is connected to a discharge port with a discharge valve via a discharge pipe. A discharge hose mounted on the vehicle is connected to the underground tank of the gasoline station. In the case of a granular material transport vehicle, the discharge port in the center of the bottom surface of the tank 6 is unloaded to a silo or the like via an external receiving pipe after passing through an in-vehicle discharge pipe. Pressurized air is blown into the inside from an air pipe.
Now, in this type of tanker truck, such various pipes (including hose) are arranged vertically and horizontally on the back surface D side of the sub-frame 12 below the tank 6 and various kinds of pipes attached to these pipes. Air piping, wiring (including cords), etc. for controlling the opening and closing of the valves are complicatedly arranged.
Further, on the surface C side of the sub-frame 12, for example, an operation box 13 as a control box for controlling such piping, wiring, valves, etc., a tool box as these tool boxes, and further a side for protecting the vehicle body. An accessory 9 such as a bumper 8, that is, an external part or an accompanying part is attached. Of course, any one of the operation box 13, the tool box, the side bumper 8, etc. may not be attached. In the figure, E is a cab and F is a wheel.
The tank car is roughly like this.

<< Subframe 12 >>
Hereinafter, the present invention will be described with reference to FIGS. 1 and 2. The sub-frame 12 that is a cradle for the tank 6 has a pair of left and right structures and a reinforcing bracket 14.
That is, the sub-frame 12 is composed of a pair of left and right plate bodies, each of which is a straight, substantially long plate without being divided in the front-rear direction, and is arranged in parallel in the left-right direction. Yes.
The main body of the subframe 12 in the illustrated example has a substantially L-shaped vertical cross section, and is fixedly and integrally attached to the bottom surface of the tank 6 at the top end, for example, and has a bent portion on the inner side of the lower portion. The chassis frame 11 is fixedly and integrally attached to the inner bent portion of the upper portion by welding or bolts and nuts. And about such a right-and-left sub-frame 12 main body, the reinforcement bracket 14 is respectively used in multiple numbers as a reinforcement component, leaving the mutual space | interval in the front-back direction.
The subframe 12 is as described above.

<< Reinforcing Bracket 14 >>
Such a reinforcing bracket 14 will be further described in detail. Each of the reinforcing brackets 14 is made of a metal member such as aluminum that is integrally formed. The reinforcing brackets 14 are, for example, molded into a vertically elongated block shape and include a plurality of hollow spaces 15.
That is, the reinforcing bracket 14 is formed by, for example, extrusion processing or drawing processing, and the left and right side surface portions 16, the top surface portion 17, the bottom surface portion 18, the plurality of horizontal partition portions 19, and the like are integrally molded. The hollow space 15 is formed in a plurality of stages in the vertical direction in a penetrating manner along the front-rear direction of the tank truck 10.
In the illustrated example, the left and right sides between the horizontal top surface portion 17 and the bottom surface portion 18 are respectively closed by the side surface portion 16, and the front and rear are open and formed as a generally vertically long block cylinder, and the inside is vertically The space is divided by two horizontal transverse sections 19, thereby forming an upper, middle and lower three-stage hollow space 15.

The reinforcing brackets 14 are fixedly and integrally attached to the back surface D of the main body of the subframe 12 on the side surfaces by welding or bolts and nuts, respectively, and on the bottom surface of the tank 6 as described above. Along with the top end of the subframe 12 main body, it is fixedly and integrally attached by welding or bolts and nuts.
That is, the one side / outside side surface portion 16 of the reinforcing bracket 14 is attached and fixed to the back surface D of the main body of the subframe 12 by, for example, welding.
The top surface portion 17 of the reinforcing bracket 14 is attached and fixed below the bottom surface of the tank 6 by welding, for example, via a reinforcing cloth 7 in the illustrated example. The reinforcing cloth 7 functions as a reinforcing part together with the reinforcing bracket 14. For example, the reinforcing cloth 7 has a metal square-like shape or crossbar shape, and a plurality of pieces are provided in the left-right direction with a space in the front-rear direction below the bottom surface of the tank 6. For example, it is fixed by welding. The top surface portion 17 of the reinforcing bracket 14 is attached and fixed under the reinforcing cloth 7 by, for example, welding.
The bottom surface portion 18 of the reinforcing bracket 14 is attached and fixed, for example, by welding on the above-described bent portion toward the inside of the lower portion of the main body of the subframe 12.

A plurality of such reinforcing brackets 14 are used to reinforce the main body of the subframe 12 that holds the tank 6, and receives the load of the tank 6 together with the subframe 12 main body.
In addition, the other side / inner side surface portion 16 of the reinforcing bracket 14 is curved and inclined so that the upper side widens the hollow space 15 in view of holding the bottom surface of the tank 6 left and right. In other words, the reinforcing bracket 14 has a flat plate shape on the one side / outside side surface portion 16 attached to the main body of the subframe 12, whereas the side surface portion 16 on the other side / inside has a curved inclined plate shape. None, the top surface portion 17 has a larger area than the bottom surface portion 18.
The reinforcing bracket 14 is as described above.

《Action etc.》
The sub-frame 12 structure of the tank car according to the present invention is configured as described above. Therefore, it becomes as follows.
(1) In the tank truck such as the tank truck 10 or the granular material transport vehicle, the tank 6 is mounted on the chassis frame 11 via the subframe 12.
The sub-frame 12 that is a cradle for the tank 6 has a pair of left and right structures, and a structure having a plurality of reinforcing brackets 14 with a space in the front-rear direction.

(2) In such a sub-frame 12 structure, the reinforcing bracket 14 is made of an integrally formed metal mold, is molded into a vertically elongated block shape, and is vertically multi-staged while penetrating in the front-rear direction. A plurality of hollow spaces 15 formed are provided.
Such a reinforcing bracket 14 is fixed to the back surface D of the metal subframe 12 body at the side surface portion 16 and fixed to the bottom surface of the metal tank 6 at the top surface portion 17 by welding or bolts and nuts. Installed.

(3) Now, in this type of tanker truck such as the tank lorry 10, a plurality of reinforcing brackets 14 are attached to the back surface D of the subframe 12 body in this way, and on the surface C side of the subframe 12 body. The accessory 9 such as the side bumper 8, the tool box, and the operation box 13 is attached.
And in this sub-frame 12 structure, the attachment 9 comes to be attached to the surface C side also about the location where the reinforcement bracket 14 was attached to the back surface D.
That is, the reinforcing bracket 14 attached to the back surface D of the main body of the subframe 12 includes a hollow space 15 in the front-rear direction. Therefore, by using this hollow space 15, the accessory 9 on the surface C side and its mounting bracket are attached to the side surface portion 16 of the reinforcing bracket 14 by, for example, a bolt nut 20 stop, etc. via the main body of the subframe 12. It can be easily installed.
Thus, in this subframe 12 structure, the presence of the reinforcing bracket 14 attached to the back surface D of the main body of the subframe 12 does not prevent the attachment 9 from being attached to the surface C of the attachment location. The mounting space for the accessory 9 is expanded without restricting the mounting position of the product 9.

(4) Further, in this type of tanker truck such as the tank truck 10, a plurality of reinforcing brackets 14 are attached to the back surface D of the subframe 12 body in this way, and further, on the back surface D side of the subframe 12, Piping, wiring, etc. are arranged.
And in this sub-frame 12 structure, also in the location where the reinforcement bracket 14 was attached to the back surface D, attachment space, such as piping and wiring, is ensured easily. Piping space, wiring pace, etc. are easily secured.
That is, the reinforcing bracket 14 attached to the back surface D of the main body of the subframe 12 includes a hollow space 15 in the front-rear direction. Therefore, by using this hollow space 15, piping, wiring, etc. can be passed through the reinforcing bracket 14 and passed through the inside, and there is no need to bypass the outside, and piping processing, wiring processing, etc. are easy. It becomes.

  (5) Furthermore, this subframe 12 structure employs a reinforcing bracket 14 made of an integrally formed metal mold, and the reinforcing bracket 14 is easily manufactured by molding. The reinforcing bracket 14 can be easily manufactured integrally without any welded part by molding by extrusion or drawing.

(6) In addition, the reinforcing bracket 14 is configured so that an integrally molded product that has been manufactured continuously in advance, that is, an integrally molded product that is continuous in a horizontally long shape while the hollow space 15 is in communication, is vertically cut during construction. A plurality of necessary reinforcing brackets 14 can be easily obtained by cutting only a necessary amount.
The obtained reinforcing bracket 14 is fixedly and integrally attached to the back surface D of the main body of the subframe 12 and the bottom surface of the tank 6 by welding or bolts and nuts 20 at the side surface portion 16 and the top surface portion 17. In this way, the reinforcing bracket 14 is attached on the surface such as the side surface portion 16 and the top surface portion 17, so that the construction is easy in shape as compared with the case where the reinforcing bracket 14 is attached by an edge, that is, a line.

(7) Furthermore, the reinforcing bracket 14 employed in the subframe 12 structure is made of a metal mold that is integrally formed with the hollow space 15 and is light in shape.
In addition, the overall thickness of the reinforcing bracket 14 is not the same, and the transverse section has a relatively low strength requirement compared to the thickness of the side portion 16, the top surface portion 17, the bottom surface portion 18, etc. that require strength in terms of shape. It is also easily realized by molding to reduce the thickness of the part 19 and the like, thereby reducing the weight.

(8) Further, since the reinforcing bracket 14 is molded in the shape of an integrally formed block, the strength of the reinforcing bracket 14 is excellent in shape as compared with the case of welding a plate material.
Further, the top surface portion 17 of the reinforcing bracket 14 is attached to the bottom surface of the tank 6, thereby holding the tank 6 as a cradle for the tank 6. Thus, in this subframe 12 structure, since the reinforcing bracket 14 receives the load of the tank 6 on the surface and not on the line, the stress concentration on the tank 6 is dispersed and alleviated, and this surface and the strength are excellent. ing.

The sub-frame structure of the tank car according to the present invention will be described for the best mode for carrying out the invention. (1) FIG. 1 is a front sectional view of a main part such as a reinforcing bracket, and (2) FIG. It is a perspective view of a bracket. For the explanation of the best mode for carrying out the invention, (1) is a rear view, (2) is a side view, and (3) is an enlarged view of the main part of (2). . For explanation of this type of conventional example, (1) is a front sectional view of the main part of the reinforcing bracket and the like, and (2) is a perspective view of the reinforcing bracket. FIGS. (1) and (2) are used to explain this type of conventional example, (1) is a rear view, and (2) is a side view. (3) The figure is a side view of the tank truck.

Explanation of symbols

1 Reinforcement bracket (conventional example)
2 Side plate 3 Front plate 4 Rear plate 5 Subframe (conventional example)
6 Tank 7 Reinforcement cloth 8 Side bumper 9 Accessories 10 Tank truck 11 Chassis frame 12 Sub frame (thing of this invention)
13 Operation box 14 Reinforcement bracket (of the present invention)
DESCRIPTION OF SYMBOLS 15 Hollow space 16 Side part 17 Top surface part 18 Bottom part 19 Side partition part 20 Bolt nut A Back surface (the thing of a prior art example)
B surface (conventional example)
C surface (invention)
D Back side (thing of this invention)
E cab F wheel

Claims (3)

In tank trucks such as tank trucks and granular material transport vehicles that have tanks mounted on chassis frames via subframes,
The sub-frame, which is a cradle for the tank, has a pair of left and right structures and a reinforcing bracket. The reinforcing bracket is made of an integrally formed mold and has a plurality of hollow spaces. A sub-frame structure for a tanker vehicle. In the sub-frame structure of the tanker vehicle according to claim 1,
The reinforcing bracket is made of metal, is molded into a vertically elongated block shape, and a plurality of reinforcing brackets are used in the front-rear direction.
At the side, it is fixedly and integrally attached to the back surface of the metal subframe by welding or bolts and nuts, and at the top surface, the bottom of the metal tank is welded together with the subframe. A subframe structure for a tanker vehicle, characterized in that it is fixedly and integrally attached with bolts and nuts, and the hollow space is formed in multiple stages in the vertical direction while penetrating in the front-rear direction. In the sub-frame structure of the tanker vehicle according to claim 2,
Accessories such as side bumpers, tool boxes, and operation boxes are attached to the front side of the subframe, and piping, wiring, and the like are arranged on the back side of the subframe. Subframe structure.

Images