JPH07291156A - Frame of container trailer - Google Patents

Abstract

PURPOSE:To shorten the whole connection length of a container trailer by installing a coupling pin at the rear position from the present position of a front part main rail by forming the stage part of the left and right main rails in pair which extend in the longitudinal direction, from an independent fixed member. CONSTITUTION:As for a container trailer 02, a reinforcing rail 7 is laid between the left and right main rails 12 in pair, and formed to a frame structure as a whole. In this case, the main rail 12 is constituted of a front part main 13, rear part main rail 14, and fixed member 15, and the front part main rail 14 is fixed on the rear lower stage of the fixed member 15. The front and rear end frames 18 are installed at right angle at the front and rear end parts of the left and right main rails 12 and 12, and a coupling pin 11 engaged with the connecting device of a tractor is installed in projection downward on the center line of the basic board 8 installed between the reinforcing rails 7 and 7 positioned between the front part main rails 13 and 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container trailer frame structure, and more particularly to an improvement of a trailer frame structure for mounting a container having a tunnel recess in a floor structure.

[0002]

2. Description of the Related Art Conventionally, a main rail 1 of a container trailer 01 is an integrally formed structure extending forward and backward as shown in FIGS. 11 and 12, and a step portion 2 is provided in the middle thereof to provide a front main rail 3 and a rear portion. It formed the main rail 4. The front main rail 3 is formed one step higher to fit in the tunnel recess 6 of the container 5 shown in FIGS. 3 to 5, and the weight in front of the container 5 is supported by this portion. Further, the dimension A of the tunnel recess 6 of the container 5 is determined by international standards, and the dimension B of the front main rail 3 is also determined by this, and usually dimension A ≦ dimension B.

A front end frame 18 and a rear end frame 19 are attached to the front and rear ends of the pair of main rails 1 and 1, respectively. A plurality of reinforcing rails 7 are installed between the main rails 1 and 1 as shown in FIG. A base 8 is provided between the reinforcing rails 7 located between the front main rails 3 and 3 and the front end frame 18, and the bases 8 are shown in FIG. Tractor 9
A coupling pin 11 for engaging with the coupler 10 is provided so as to project downward. Within the range of a constant radius centered on the coupling pin 11, the component installation impossible dimension C is necessary in order to avoid interference with the structure of the tractor 9.

Further, the step portion 2 of the front main rail 3 and the rear main rail 4 is formed by stacking the front main rail 3 and the rear main rail 4 vertically in order to secure sufficient strength. It has a shape. The length dimension that is overlapped at this time is referred to as dimension D.

As described above, the container trailer 01
First, the dimension B is determined so as to conform to the international standard of the container, and the position of the step portion 2 having the dimension D is determined so as to secure the strength. Therefore, the distance from the front end of the front main rail to the front end of the rear main rail is smaller than the distance from the front end of the front main rail to the rear end of the front main rail. Further, since the position of the coupling pin 11 is determined at a distance of the dimension C from the step portion 2, the coupling pin 11 is positioned near the front end of the front main rail 3 as shown in FIG. Become.

[0006]

There is one conflicting problem here. When the total connecting length L of the tractor 9 and the container trailer 01 is shortened, the handling of the vehicle is facilitated and the traveling stability is further improved. Also the wheels of the container trailer
By reducing the distance between 16 and the coupling pin 11, the minimum turning radius becomes smaller. Furthermore, there are many advantages such as high space efficiency even when parking or stopping. Originally, the trailer reduces the maneuverability of long vehicles by providing joint points. Therefore, in order to improve the handling, it is necessary to shorten the total connecting length L. However, in order to improve logistics efficiency, it is better to be able to carry as large a container as possible. Therefore,
The length of container trailer 01 cannot be shortened.
It is necessary to satisfy both of these conditions, and as one method for solving the problem, efforts have been made to shorten the total connecting length L by shortening the total length of the tractor 9 as much as possible.

However, there is naturally a limit to reducing the total length of the tractor 9. Therefore, it is necessary to devise the container trailer 01. At present, the coupling pin 11 is located near the front end of the front main rail 3, but this position is very disadvantageous in shortening the total connecting length. If the coupling pin 11 can be provided on the front main rail at a position rearward from the current state, the total connecting length can be greatly shortened and a container of the same size as the conventional one can be carried. However, in the method in which the main rail 1 of the container trailer is integrally formed so as to extend in the front-rear direction and the step portion 2 is provided in the middle to form the front main rail 3 and the rear main rail 4 as described above, B,
In order to satisfy the dimensions C and D, the coupling pin 11 must be provided near the front end of the front main rail 3, which makes it difficult to solve the problem.

The present invention has been made in view of the above problems, and an object thereof is to form the step portion of the main rail by an independent fixing member to keep the strength of the main rail. Coupling pins can be installed on the front main rail at a position rearward from the current state, shortening the total connecting length of the tractor and container trailer, and
A container of the same size as the conventional one can be installed.

[0009]

Means for Solving the Problems According to the present invention for solving the above-mentioned problems, a pair of left and right main rails extending in the front-rear direction is provided with a step portion, an upper step of the step portion is provided with a front main rail and a lower step is provided. In a frame of a container trailer that forms a rear main rail and has a coupling pin that protrudes downward with a certain distance from the step on the base provided on the front main rail, It is characterized in that it is formed by an independent fixing member, and the front main rail and the rear main rail are joined to the fixing member.

In the present invention, the distance from the front end of the front main rail to the front end of the rear main rail is preferably larger than the distance from the front end of the front main rail to the rear end of the front main rail.

Further, it is preferable that the fixing member is made of a piece of plate having its front portion fixed to the lower surface of the front main rail and its rear portion fixed to the upper surface of the rear main rail.

Further, it is desirable that the fixing member made of the one piece of plate material is made of high tensile steel.

[0013]

With the use of independent fixing members as the steps of the pair of left and right main rails extending in the front-rear direction, the front main rail and the rear main rail are joined to the fixing members, thereby setting the strength of the steps. Can be done easily. Therefore, when setting the shape of the main rail, there is no restriction on the shape for maintaining the strength of the stepped portion.

In the present invention, since the distance from the front end of the front main rail to the front end of the rear main rail is larger than the distance from the front end of the front main rail to the rear end of the front main rail, the parts are installed. Even if the size is not taken into consideration, the position of the coupling pin can be set rearward from the vicinity of the front end of the conventional main frame.

Further, since the fixing member is made of a piece of plate material whose front portion is fixed to the lower surface of the front main rail and its rear portion is fixed to the upper surface of the rear main rail, the front main rail and the rear main rail are connected to each other. , The upper and lower positions can be engaged with each other, and the structure is simple.

Since the fixing member made of one piece of plate material is made of high tensile steel, even if the main rail is formed by combining separate members, the same strength as that of the conventional main rail made of a single member is obtained. Obtainable.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

1 and 2 show a container trailer of the present invention, and FIGS. 3 to 5 show a container mounted on the container trailer. The container trailer 02 has a skeleton structure in which a reinforcing rail 7 is installed between a pair of left and right main rails 12. The main rail 12 includes a front main rail 13, a rear main rail 14, and a fixing member 15.

A plurality of wheels 16 are attached to the rear of the rear main rail 14. The number of wheels and axles is determined according to the weight of load that can be mounted. More wheels and axles can carry more weight. Further, if the weight is the same, the larger the number of wheels and the number of axles, the smaller the load per wheel on the road surface, which is good for road protection. A landing gear 17 is provided in front of the rear main rail 14. The landing gear 17
When the container trailer 02 is left alone, it is an auxiliary leg for supporting its own weight, and can be raised or lowered manually, electrically or hydraulically. The landing gear 17 is stored after being connected to the tractor so as not to come into contact with the road surface during traveling.

A front end frame 18 and a rear end frame 19 are attached at right angles to the front end portions and rear end portions of the main rails 12, 12. Front latches 20, 20 are attached to the left and right ends of the front end frame 18. Also, the rear frame
Twist locks 21, 21 are attached to the left and right ends of 19. This, front latch 20 and twist lock 21
Is to fit the lower corner fittings 22 provided at the four corners of the container 5 to fix the container 5 and the container trailer 02.

The container 5 has a box shape as shown in FIGS. 4 and 5, and the lower corner metal fittings 22 are provided at the four corners of the lower surface. Further, a plurality of cross members 23 are installed. The cross member 23 is for increasing the strength of the container 5 and also for transmitting a load to the rear main rail 14 of the container trailer 02. Container 5
A tunnel recess 6 is provided on the lower surface. The tunnel recess 6 is an engaging portion between the container 5 and the container trailer 02, and its length A, width A2 and depth A3 are defined by international standards.

Front main rail 13 of container trailer 02
Has a dimension that fits into the tunnel recess 6, and the length dimension A of the tunnel recess 6 and the length dimension B of the front main rail 13 are substantially the same. The front main rail 13 is fixed to the front upper stage of the fixing member 15 described above. Further, the rear main rail 14 is fixed to the lower rear part of the fixing member 15. Therefore, the front main rail 13 is one step higher than the rear main rail 14, and the difference is substantially the same as the international standard A3 of the tunnel recess 6 of the container. Therefore, the tunnel recess 6 of the container engages with the front main rail 13 and the cross member 23 rides on the rear main rail 14, whereby the container load is supported by the container trailer 02. Further, the front latch 20 and the twist lock 21 are engaged with and locked by the lower corner metal fitting 22, and the container 5 is fixed on the container trailer 02.

A base 8 is provided between the reinforcing rails 7 and 7 located between the front main rails 13 and 13, and the tractor shown in FIG. The coupling pin 11 for engaging the connector 10 of 9
It is provided so as to project downward.

The fixing member 15 will be described with reference to FIGS. 6 and 7.

The fixing member 15 is made of a single solid plate material. Its side shape is trapezoidal. Due to its simple shape, it is easy to manufacture and low cost. The front main rail 13 is fixed to the upper surface of the fixing member 15, and the rear main rail 14 is fixed to the lower side surface facing rearward. Front main rail 1
3, the rear main rail 14 and the like use general structural rolled steel or the like as its material, but the fixing member 15 has a tensile strength of 60.
High rigidity is obtained by using high-strength steel of about 80 kg / mm ² . Further, for example, electric welding is used for each fixing. This ensures a stable fixation.

Since the fixing member 15 has high strength, even if the rear end of the front main rail 13 is located in front of the front end of the rear main rail 14, it is possible to withstand the load of the container. Therefore, it is not necessary to set the shape in consideration of the length dimension D of the step 2 as in the conventional example. Therefore, if the above-described component installation impossible dimension C is taken from the position of the front end of the rear main rail 14 that has moved rearward, the coupling pin 11 is provided rearward as much as the position of the front end of the rear main rail 14 has moved rearward. It becomes possible. As shown in FIG. 1, the coupling pin 11 is installed at a substantially central portion in the front-rear direction of the front main rail.

Here, FIG. 8A shows the total connecting length L of the tractor 9 and the container trailer 01 according to the conventional example as shown in FIG.
(B) shows the total connecting length L'of the tractor 9 and the container trailer 02 when the present invention is implemented. As is clear from the figure, L> L '. Further, the relationship between the distances Y and Y ′ between the wheels of the conventional container trailer 01 and the container trailer 02 of the present invention and the coupling pin 11 is Y> Y ′. Moreover, since the total length X of the main rail 12 is the same as that of the conventional container trailer 01, it is possible to mount a container having the same length as the conventional one.

Next, other embodiments will be described with reference to FIGS.
Will be explained. The fixing member 15 ′ may have any shape as long as the required strength can be obtained. As shown in the figure, one end may have a pointed shape and the other end may be cut off at a right angle.

[0029]

As described above, the present invention has the following effects. By using independent fixing members as the step portions of the pair of left and right main rails extending in the front-rear direction, and joining the front main rail and the rear main rail to the fixing members, it is possible to easily set the strength of the step portions. it can. Therefore, when setting the shape of the main rail, there is no restriction on the shape to maintain the strength of the stepped portion, and the installation location of the coupling pin is at the front end of the front main rail unlike the conventional case. There is no such thing as a limitation.

In the present invention, since the distance from the front end of the front main rail to the front end of the rear main rail is larger than the distance from the front end of the front main rail to the rear end of the front main rail, the parts are installed. Even taking into account the improper dimensions, the coupling pin can be installed rearward from the vicinity of the front end of the conventional main frame. Therefore, since the container trailer is located closer to the front than the conventional tractor, the total connecting length can be shortened. At the same time, the distance between the wheels of the container trailer and the coupling pin can be shortened. Therefore, the minimum turning radius in the connected state of the tractor and the container trailer becomes smaller, and the driving operability of the vehicle is improved. At this time, the length of the mountable container is the same as the conventional one.
In addition, long roads with the same width can carry containers longer than before. Further, when the vehicle is parked and stopped while being connected to the tractor, the space efficiency is improved.

Further, since the front part of the fixing member is fixed to the lower surface of the front main rail and the rear part thereof is fixed to the upper surface of the rear main rail, the fixing member is made of a piece of plate material. Can be engaged with each other in a vertical positional relationship, and the structure is simple. Therefore, the manufacturing is easy and the cost can be suppressed.

Moreover, since the fixing member made of one piece of plate material is made of high tensile steel, even if the main rail is formed by combining separate members as in the present invention, it is made of a conventional single member. Since the strength similar to that of the main rail can be obtained, the shape can be freely set.

[Brief description of drawings]

FIG. 1 is a side view of a container trailer showing an embodiment of the present invention.

FIG. 2 is a top view of a container trailer showing an embodiment of the present invention.

FIG. 3 is a side view of the container used in the present invention.

FIG. 4 is a bottom view of the container used in the present invention.

FIG. 5 is a front view of the container used in the present invention.

FIG. 6 is a side view of a fixing member of a container trailer showing an embodiment of the present invention.

FIG. 7 is a top view of a fixing member of a container trailer showing an embodiment of the present invention.

FIG. 8 is a schematic diagram showing a difference between the conventional example and the case of implementing the present invention.

FIG. 9 is a side view of a fixing member of a container trailer showing another embodiment of the present invention.

FIG. 10 is a top view of a fixing member of a container trailer showing another embodiment of the present invention.

FIG. 11 is a side view of a container trailer showing a conventional example.

FIG. 12 is a top view of a container trailer showing a conventional example.

FIG. 13 is a schematic diagram showing a connected state of a tractor and a container trailer.

[Explanation of symbols]

 1 Main Rail 2 Step 3 Front Main Rail 4 Rear Main Rail 5 Container 6 Tunnel Recess 7 Reinforcing Rail 8 Base 11 Coupling Pin 12 Main Rail 13 Front Main Rail 14 Rear Main Rail 15 Fixing Member 15 'Fixing Member

Claims (4)

[Claims] 1. A base provided on the front main rail, wherein a pair of right and left main rails extending in the front-rear direction is provided with a step portion, an upper step of the step portion is formed with a front main rail, and a lower portion is formed with a rear main rail. In the frame of the container trailer having a certain distance from the step portion and provided with a coupling pin protruding downward, the step portion is formed by an independent fixing member, and the fixing member includes a front main rail, The frame of the container trailer, which is joined to the rear main rail. 2. The distance from the front end of the front main rail to the front end of the rear main rail is larger than the distance from the front end of the front main rail to the rear end of the front main rail. The frame of the container trailer described in 1. 3. The fixing member is made of a piece of plate material having a front portion fixed to a lower surface of a front main rail and a rear portion fixed to an upper surface of a rear main rail.
The frame of the container trailer according to any one of 1 to 2. 4. The fixing member composed of the one piece of plate material,
The container trailer frame according to claim 1, wherein the frame is made of high-strength steel.