JP2000211419A - Trailer for container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain easy loading and unloading work by moving a container to the middle part of an under carriage while a vehicle is running and moving it back to the position where the rear end side of the container becomes flush with that of the under carriage while a vehicle is performing loading or unloading, thereby dumping up the front end of the container. SOLUTION: This trailer is provided with a moving frame 16 on the upper flange part of a main rail and a tilting frame 15 overlaid thereon. The moving frame 16 is formed with rolling parts 33, 36 at the four corners and the tilting frame 15 on the upper stage involves bolsters fitted with fasteners which are engaged with the corner joints at the four corners of the container. Bulkheads 29 having a connecting part connecting with a hoisting device 18 are mounted in a standing manner on the bolsters at the front end and supporting pieces are fitted at the lower part of both the end parts of the bolsters at the rear end. The supporting pieces and the roller of the rolling part 36 at the rear end of the moving frame 16 on the lower stage are connected by means of a common pivot shaft so as to be rotatable. It is thus possible to dump up the tilting frame 15 to which the container is tightened by extending or contracting the hoisting device 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trailer for loading and unloading various containers, and more particularly to a trailer for loading and unloading cargo by moving or tilting the container during loading.

[0002]

2. Description of the Related Art Referring to FIGS.
The basic configuration of the trailer A equipped with the above will be described.
Trailer A consisted gooseneck portion A ₂ Metropolitan having a connecting portion for connecting a container loading part A ₁ and tractor chassis frame ladder with the pair of main frames 1, 1, a plurality of cross members 2 perpendicular to these Jo to be formed, a pair of telescopic legs 3 on the left and right sides of the gooseneck portions a ₂ which one step higher than the portion for stacking containers C are vertically downward. The trailer A has a rear axle 9 at its rear end. If tractor D (FIG. 11) pulls the trailer A, the vehicle height of the trailer A side with respect to connection of the tractor D is I am not exceed the vehicle height of the laws defined by the presence of the gooseneck portion A _2. Tractor D
The kingpin 4 protruding downward from the connecting portion of the trailer A is locked and pulled with respect to the connecting coupler 5 provided at the connecting portion. This type of trailer has a gooseneck A ₂
Various container is placed on the rear of the container loading part A _1.

[0003] Generally, the corner fittings 6 for tightening are arranged at the four corners of the floor of the container, and these are fastened to the container mounting part A _1.
Is placed on the fasteners (twist locks) 8 provided at both ends of the long bolsters 7a and 7b provided at the front and rear of the container, and the container is tightened by rotating the head of the fastener 8 Or make it free. The trailer can be separated from the tractor when the telescopic leg 3 is grounded. During traveling, the kingpin 4 is connected to the coupler 5 on the tractor D side, and the telescopic leg 3 is raised to keep the retracted state. Since the connecting portion receives the load in this way, the coupler 5 is referred to as a fifth wheel.

[0004] The present applicant has previously filed Japanese Patent Application No. 7-123584.
In the specification and Japanese Patent Application No. 10-85519,
When a 40-foot container chassis frame (container chassis) is also used for a 20-foot container for cargo handling, a step δ is generated between the rear end of the mounted 20-foot container and the platform P as shown in FIG. Therefore, in order to solve the problem that a forklift or the like cannot run, a new handing plate has been proposed.

Further, recently, the longest wheelbase of the trailer has been extended due to deregulation, so that the distance between the wheels has become longer. For this reason, for example, as shown in FIG.
In the case of a bulk container, when discharging a load (bulk) from the rear discharge port 14c, it is difficult to work unless the rear end of the container and the rear end of the trailer are flush with each other.

Conventionally, the total gross weight GCW of the trailer is determined by the vehicle length d (see FIG. 1) based on the regulations of the vehicle restriction order. Further, the total weight GVW of the trailer is determined to be 28 tons ≧ GVW. In order to increase the total loading weight of the container, it is necessary to reduce the weight of the trailer.

However, when the trailer is biaxial, if the container is placed at the trailing end of the trailer, the tires are biaxial.
It is overloaded because it receives a load of 8 tons. If the two axes are changed to three axes, the container load received by the fifth wheel is too light, which causes slipping on a snowy road or the like. Therefore, measures such as placing a counterweight on the fifth wheel are required. Therefore, if the container is moved toward the center of the fifth axle in front and placed near the center, the fifth axle is 9 tons, and the two rear axles are 19 tons.
The load of tons is divided and received, whereby the load on the rear axle is reduced and the balance is improved.

Here, a bulk container is taken as an example of the container, and a cargo handling device of the bulk container will be described below. Various shapes of the bulk container are known, such as a cylindrical tank, a silo-shaped tank, and a rectangular parallelepiped box, depending on the properties of the granular material. The box-shaped container shown in FIG. 1 is a well-known one, and has a double structure in which a bag-shaped container 14a is housed inside an outer wall, and can be filled with various powders. Since the load (bulk) is a granular material, it is loaded from two input ports 14b provided in the upper part of the bag-like container 14a, and the granular material filled therein is provided flush with the trailing end surface of the trailer. The cargo is discharged from the discharge port 14c of the packed box to the storage tank at the destination.

As a method of loading and unloading this kind of bulk container while placing it on the bed of a trailer at a delivery destination, a well-known car damper type (FIG. 13 (c)) or a self-dump type discharging method (FIG. 13 ( a)), and a high-lift coupler system (FIG. 13 (b)) in which containers are loaded and unloaded from the undercarriage to the ground by a lift device mounted on the undercarriage. The present invention described below belongs to a self-dumping type (FIG. 13 (a)) in which a front end of a bulk container is dumped up by an elevating device fixed to a chassis frame. Automatically flows out of the discharge port (see reference numeral 14c in FIG. 1), and can be safely loaded and unloaded.

[0010] When the bulk container, when placed in front of part A ₁ mounting the container (Fig. 1), the rear end of the chassis frame for the reason becomes failure, the reservoir of the delivery destination to The container is far away here, making work difficult. This problem is caused by the step δ behind the 20-foot container.
Is the same as the problem that occurs.

[0011]

As described above, in order to improve the transportation efficiency of a cargo handling trailer, a function as a general-purpose trailer capable of converting an idle trailer to various containers is provided, and a chassis frame is provided. It is demanded that the steps at the rear be eliminated to facilitate the work of loading and unloading luggage, and that the trailer itself be reduced in weight and the container loading weight be increased. In order to meet such demands, the present invention moves the container to the center of the chassis frame during traveling, and retreats the rear end surface of the container to a position flush with the rear end surface of the chassis frame during cargo handling. It is an object of the present invention to provide a container trailer capable of dumping up a front end and improving the efficiency of loading and unloading of cargo.

[0012]

Means for Solving the Problems (1) A moving frame is provided on an upper flange portion of a chassis frame of a cargo handling trailer.
A tilting frame is mounted on the moving frame, and the lower moving frame is a rectangular frame including a pair of left and right vertical beams and a horizontal beam fixed to the front end and the rear end of the pair of vertical beams. Rolling elements are provided at the four front and rear corners of the frame, and an elevating device is erected at the center of the cross beam member at the front end of the frame, and at the center at the rear of the frame. A cross member having a bracket for mounting the drive unit is fixed, and the upper tilting frame has long and narrow fasteners at its front and rear ends which engage with four corner fittings of the container at the left and right ends. Bolster, and two vertical beam members provided in parallel between the front end and the rear end bolster, a cross-girder-shaped frame body, the front end face of the front end bolster being connected to an elevating device The bolster at the rear end is provided on the left and right sides of the bolster at the rear end. Bearings connected to the upper and lower bolsters at the rear end of the upper tilting frame and the rolling portion at the rear end of the lower moving frame are rotatable by a common rotating shaft. And a rotatable connection between a connecting portion of a bulkhead provided at a front portion of the tilting frame and the elevating device provided at a front portion of the moving frame, and fastening of a container by a vertical expansion and contraction operation of the elevating device. A tilting cargo handling work can be performed by dumping up the tilting frame, and a driving cylinder is provided between a cross member fixed to the rear of the chassis frame and the driving device mounting bracket provided on the moving frame. The movable frame can be moved between the traveling position and the cargo handling position on the chassis frame in a state where the container is fastened to the tilting frame by the telescopic movement of the telescopic rod of the drive cylinder. (2) The rolling portions provided at the four corners of the moving frame have a plurality of pairs of grooved rollers, and the outer peripheral grooves of the grooved rollers are moved back and forth on the upper flange portion of the main rail constituting the chassis frame. To be rolled. (3) A stopper is fixed to the rear end of the upper surface of the upper flange portion of the main rail to regulate the loading position of the moving frame. (4) A bracket protruding downward is provided at the bottom of the bolster provided at the rear end and the front end of the moving frame, and the lock pin is arranged via the bracket so as to be freely protruded and retractable in the vehicle width direction. An engaging member having an engaging hole into which the head of the lock pin fits is fixed to the traveling position and the cargo handling position of the moving frame, and the head of the lock pin is fitted into the engaging hole. A lock device capable of holding the moving frame at the traveling position and the cargo handling position is provided. (5) As the pivot for rotatably connecting the bearing piece provided at the rear part of the tilting frame and the rolling part provided at the rear part of the moving frame, of the plural pairs of grooved rollers of the rolling part, The rotation shaft of the rear roller was also used.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a container trailer 11 according to the present invention. Trailer 11
The telescopic leg 1 remains connected to the tractor 12 indicated by the two-dot chain line.
3 is stopped by touching the ground. The bulk container 10 placed on the trailer 11 is placed on a chassis frame 17 via a tilting frame 15 and a moving frame 16. Moving frame 16
Rollers provided with rollers are attached to the four front and rear corners, and a lifting device 18 for dumping is mounted on the front cross member.
Is erected. A bulkhead 29 is provided upright at the front end of the tilting frame 15 and is connected to the lifting device 18. Although the front end of the trailer 11 is supported by the telescopic legs 13, the telescopic legs 13 are retracted upward during traveling, and thus the load is borne by the king pin 19 called the fifth axis and the rear wheel biaxial 20.

The bulk container (hereinafter simply referred to as a container) 10 dumps the front end of the container at the destination and loads the cargo into the storage tank through the discharge port 7 at the rear end.
Since there is a distance from the outlet 14c to the rear end of the chassis frame 17 in the traveling state shown in FIG. 1, the container 10 is moved to the rear end position of the trailer 11 as shown in FIG. The tilting frame 15 above the moving frame 16 rests on the lower moving frame 16. The rear ends of the tilting frame 15 and the moving frame 16 are rotatably supported by a pivot (see a rotating shaft 35a shown in FIG. 9). The moving frame 16 is the cross member 2
A drive device fixed to the rear of the chassis frame 17 via a bracket 25 projecting downward from 5a, in the example of FIG. 2, is connected to a distal end of a telescopic rod 24 of a drive cylinder 23. The container moves in the front-rear direction via the moving frame 16 by the expansion / contraction operation of the expansion / contraction rod 24. Container 10 is shown in FIG.
After moving to the cargo handling position at the rear end of the trailer 11, as shown by the two-dot chain line, the front end is dumped up by the elevating device 18, and the cargo in the container is discharged to the storage tank.

Hereinafter, the moving mechanism and the tilting mechanism of the container 10 will be described in more detail with reference to FIGS. Since the device has a symmetrical structure when viewed in the front-rear direction of the vehicle, only one side will be described except for the case where the device is not symmetrical. FIG. 3 is a side view of a main part in a state where the container is moved to the traveling position in FIG. 1, and FIG. 4 is a plan view in which the container is omitted. As described above, between the container 10 and the chassis frame 17, the tilting frame 15 is located at the upper stage, and the moving frame 1 is located at the lower stage.
6 are interposed in two stages. The container 10 has corner fittings 26 at four corners. On the other hand, twist locks 28a and 28b are provided at both ends of the bolsters 27a and 27b disposed at the front end and the rear end of the tilting frame 15, respectively.
7a, 27b are provided so as to be able to protrude and retract from the upper surface. When the twist lock projects from the upper surfaces of the bolsters 27a and 27b, it fits into an engagement hole provided in the lower surface of the corner fitting 26 of the container. When the twist lock is rotated by 90 °, the twist lock engages with the corner fitting 26 to move the container 10 to the tilting frame 15. You can be tight.
A bulkhead 29 is provided upright on the front end face of the tilting frame 15, and a connecting portion 31 for pivotally supporting the elevating device 18 with a pin 30 (FIG. 3) is provided at an intermediate portion of the bulkhead 29. It protrudes toward.

The lower moving frame 16 (FIG. 5) has a rolling part 33 (FIG. 5) having three pairs of rollers 32 at the front part, and two rolling parts 33 at the rear part.
Rollers 36 (FIG. 9) having a pair of rollers 35 are provided, and the rollers 32 of the front rolling section 33 are mounted on the front rolling frame 34 (FIG. 7) and the rear rolling section 36 (FIG. 7). The roller 35 is supported by its rear rolling frame 37 (FIGS. 8 and 9) with its rotating shaft.
The front and rear rolling frames 34, 37 are connected by a pair of vertical beam members 38, 38. A horizontal beam 39 (FIG. 8) is provided between the left and right rolling frames 37 at the rear end, and two horizontal beams provided between the rollers 32 between the front rolling frames 34. 40
a and 40b (FIG. 5), and the moving frame 16 is assembled in a grid pattern. A telescopic lifting device 18 is provided upright at the center of the upper surface of the front cross member 40a. The rollers 32 and 35 of the front and rear rolling parts 33 and 36 are shown in FIG.
As shown in FIG.
2 and rides on the upper flange portion 22a.

Next, as shown in FIG. 6, an elevating device 18 is provided with a telescopic part 18a comprising a telescopic cylinder.
And a cylindrical rising portion 18b which is stored in a contracted state and rises when expanded, and can be vertically expanded and contracted by a switch operation of a hydraulic device (not shown) mounted on the chassis frame 17. The extendable portion 18a is pivotally supported by a pin 42 (FIG. 5) on a base 41 (FIG. 6) having a base end fixed on the upper surface of a front cross member 40a constituting the rolling frame 34. A screw portion (not shown) is screwed into a screw hole (not shown) provided at the top of the rising portion 18b, and a nut 18c is provided.
(FIGS. 3 and 4).

Next, as is apparent from FIGS. 5 to 7, the raised portion 18b has a U-shape projecting forward from an intermediate portion of an L-shaped bulkhead 29 which is erected at the front end of the tilting frame 15. Is pivotally supported by a pin 30 to the connecting portion 31 having the shape shown in FIG. On the other hand, as is clear from FIGS. 8 and 9, the support piece 45 (FIG. 9) projecting obliquely rearward from the rear end face of the bolster 27 b at the rear end of the tilting frame 15 is attached to the moving frame 1.
The roller 6 is pivotally supported on the same axis as the rotation shaft 35a of the roller 35 which is mounted on the rolling frame 37 (FIG. 8) of the rolling portion 36 at the rear end of the roller 6. Further, the main rail 22 on which the rollers 35 roll is used.
A stopper 46 is provided at the rear edge of the upper flange portion 22a.
(FIG. 9) is protruded, thereby preventing the retreating moving frame 16 from falling down to the rear of the chassis and placing the container 10 by extending the elevating device 18 with the roller 35 in contact with the stopper 46. Move the tilting frame 15 to the bulkhead 2 at the front end.
9, the cargo handling position for dumping up is regulated.

Next, in order to move the moving frame 16 on which the container is placed in the front-rear direction and to fix it at the stopped traveling position and the cargo handling position, the lower portion of the cross beam 40b at the front of the moving frame 16 and the cross beam 39 at the rear thereof are fixed. Locking devices 47 each having the same structure
Is provided. The locking device 47 provided on the front cross member 40b will be described in detail with reference to FIG. Lock device 4
Reference numeral 7 allows the free end of the lock pin 50 to be slidably inserted into the cylindrical portion of the cylindrical slide member 49 provided between a pair of brackets 48a and 48b projecting downward from the bottom of the cross beam member 40b. On the other hand, an engaging member 52 having an engaging hole 51 into which the free end fits is fixedly provided at an upper portion inside the web portion 22b of the main rail 22. When the lock pin 50 slides outward due to the spring force of the coil spring 54, the lock pin 50 is fitted into the engagement hole 51 and locked.

The web portion 22b of the main rail 22 extending from the engagement hole 51 is provided with a through hole 51a for confirming from the side that the lock pin 50 is inserted. The lock pin 50 has a ridge 50a on the central peripheral surface,
This prevents the bracket 48b from coming off outward. A compression coil spring 54 is mounted between the bracket 53 and the protruding ridge 50a on the bracket 53 further provided inside the bracket 48b, and constantly biases the lock pin 50 outward. The other end of the lock pin 50 is rotatably connected via a link rod 55 to one end of an interlocking lever 57 that is rotatable about a support shaft 56. Further, since the end of the interlocking lever 57 and the base end of the operation rod 58 are pin-connected, the operation rod 58 is manually operated.
Pulling the handle 59 at the free end of the
7 rotates clockwise (arrow), and the engagement between the lock pin 50 and the engagement member 52 is released. Thus, the operating rod 5
Engaging members 52 are provided in front and rear of the movable frame 16 at the traveling position and the cargo handling position, respectively, by operating the lock pin 50 so as to be able to be freely engaged and disengaged through the engaging pin 8.

Here, the procedure of the cargo handling operation of the trailer for the bulk container according to the present embodiment will be described. (1) After the trailing end of the trailer 11 is retracted to the receiving storage tank at the transport destination, the handle 59 of the lock device 47 that locks the moving frame 16 on which the container 10 is mounted in the traveling position is manually moved. To lock the lock pin 50 at the release position. (2) Next, the rod 24 of the drive cylinder 23 fixed to the rear of the chassis frame 17 is extended by a switch operation and the rear end of the movable frame 16 is brought into contact with a stopper 46 (loading position) at the rear end of the chassis frame. The rolling part 36 is moved backward. (3) After stopping, release the handle 59 of the lock device 47 and insert the lock pin 50 into the engagement hole provided at the cargo handling position of the container to lock. (4) The discharge port 14c of the container is opened to allow the loading of the powdery material into the storage tank, and the lifting device 1
The telescopic type telescopic portion is extended by operating the switch of 8, and the tilting frame 15 on which the container 10 is placed is dumped up at an appropriate speed, and the load is discharged to the lower storage tank by its own weight. (5) When the loading / unloading is completed by dumping up and the work is completed, the operation is returned in the reverse procedure to the above-mentioned operation. That is, the expansion and contraction portion 18a is contracted by the switch operation to lower the front portion of the container. At this time, tilt frame 1
5 is fitted in the guide hole 60 provided at the lower end of the bulkhead 29 by being guided by the guide pin 61 projecting from the upper surface of the cross beam member 40b of the moving frame 16 and overlapping the moving frame 16 (FIG. 5). (6) When the cargo handling work at the destination is completed, the chassis frame 1
7 is released, and the driving cylinder 23 is operated to advance the front-end rolling portion 33 to a running position where the rolling portion 33 contacts the base end of the gooseneck portion. Then, the operating rod 58 is released again to insert the lock pin 50 into the engagement hole 51. After completing the above-mentioned operations, the trailer can be run when the travel preparation is completed.

[0022]

According to the first aspect of the present invention, the rolling parts are provided at the four front and rear corners of the moving frame, and the moving frame is mounted so as to roll on the chassis frame, and the tilting frame is further mounted thereon. Since the container can be easily moved and tilted, the container to be loaded is not limited to the container dedicated to the trailer, and can be applied to any container. In addition, since the tilting frame loaded with the containers is overlapped with the moving frame to enable dumping, the transport of the bulk container and the discharge of the load can be performed safely. According to the invention of claim 2, the main rail is used for running the rolling portion rollers of the moving frame, and no other running rail is provided, so that the weight of the vehicle can be reduced. According to the third aspect of the present invention, since the stopper is provided at the rear end of the main rail, the cargo handling position of the moving frame is securely held, and the accuracy and safety of the operation are ensured.
According to the fourth aspect of the present invention, since the moving position of the container placed on the tilting frame can be reliably locked, a stable cargo handling operation can be performed. According to the fifth aspect of the present invention, since the pivot shaft of the tilting frame is also used by the rotating shaft of the rearmost roller of the moving frame, both can be integrated with a simple structure, and the discharging operation of the bulk container can be efficiently performed by moving and tilting. It became possible to do well.

[Brief description of the drawings]

FIG. 1 is a side view of a container trailer according to the present invention.

FIG. 2 is a side view showing a state in which the container trailer according to the present invention is retracted and dumped up.

FIG. 3 is a side view showing a detailed structure of an upper portion of a chassis frame.

FIG. 4 is a plan view of a chassis frame.

FIG. 5 is a side view showing a detailed structure of a front portion of a moving frame.

FIG. 6 is a front view of the lifting device.

FIG. 7 is a plan view of the lifting device.

FIG. 8 is a rear view showing a relationship between a main frame and rollers.

FIG. 9 is a side view showing the detailed structure of the rear part of the moving frame.

FIG. 10 is a detailed view of a lock device.

FIG. 11 is a side view showing a state where a known bulk container is placed on a trailer.

FIG. 12 is a plan view of the known container loading trailer.

FIG. 13 is an explanatory view of various discharging methods of a bulk container.

[Explanation of symbols]

10 Container 11 Container trailer 12 Tractor 13 Telescopic legs 14a Bag-shaped container 14b Inlet 14c Discharge outlet 15 Tilt frame 16 Moving frame 17 Undercarriage frame 18 Elevating device 18a Telescopic part 18b Elevating part 19 Kingpin 20 Rear wheel 21 Exit 22 Main rail 22a Upper flange part 23 Drive cylinder 23a Cross member 24 Telescopic rod 25 Bracket 25a Cross member 126 Corner fitting 27a, 27b Bolster 28 Twist lock 29 Bulkhead 30 Pin 31 Connecting part 32 Roller 33 Rolling part (front part) 34 Rolling frame (Front) 35 Roller (Rear) 35a Rotating shaft 36 Rolling part (Rear) 37 Rolling frame (Rear) 38 Vertical beam 39 Horizontal beam 40a Horizontal beam 40b Horizontal beam 41 Base 42 Pin 43 Connecting part 44 Mold connection part 45 Bearing piece 46 Stopper 47 Lock device 48 Bracket 49 Slide member 50 Lock pin 50a Projection 51 Engagement hole 51a Through hole 52 Engagement member 53 Bracket 54 Compression coil spring 55 Link rod 56 Support shaft 57 stations Moving lever 58 Operating rod 59 Handle 60 Guide hole 61 Guide pin

Claims (5)

[Claims] 1. A moving frame is mounted on an upper flange portion of a chassis frame of a cargo handling trailer, and a tilting frame is stacked on the moving frame. The lower moving frame includes a pair of left and right vertical beams and the pair of left and right vertical beams. A rectangular frame composed of a front beam and a horizontal beam material fixed to the rear end of the vertical beam material, wherein rolling parts are disposed at four front and rear corners of the frame material, and a cross beam material at the front end of the frame material is provided. An elevating device is erected at the center, and a transverse beam having a bracket for mounting a drive unit is fixed at the rear of the frame body, and the upper tilting frame is provided at its front end and rear end. A long bolster having a fastener at the right and left ends for engaging with four corner fittings of the container, and a two-side bolster provided in parallel between the front and rear bolsters.
A cross-girder frame made of a vertical beam material, and a bulkhead having a connecting portion connected to an elevating device is erected on a front end surface of the bolster at the front end, and left and right sides of a bolster at a rear end. The upper portion has bearing pieces connected to rolling portions provided on both sides of the rear portion of the moving frame. The supporting pieces provided on the bolster at the rear end of the upper tilting frame and the rear end portion of the lower moving frame are provided. The rolling unit is rotatably connected to the rolling unit by a common pivot, and the connecting unit of the bulkhead provided at the front of the tilting frame and the elevating device provided at the front of the moving frame are rotatably connected. The tilting frame, to which the container is fastened, is dumped up by the up / down movement of the lifting / lowering device so that the tilting cargo handling operation can be performed. Further, the tilting frame is provided on the cross member fixed behind the chassis frame and the moving frame. Drive between the drive device mounting bracket With the device mounted and the expansion and contraction operation of the telescopic rod of the drive unit, the moving frame can be moved between the traveling position and the cargo handling position on the chassis frame while the container is fastened on the tilting frame for containers. Trailer. 2. The rolling portion provided at each of the four corners of the moving frame has a plurality of pairs of grooved rollers, and the outer peripheral groove of the grooved roller is formed on an upper flange portion of a main rail constituting a chassis frame. 2. The container trailer according to claim 1, wherein the trailer rolls back and forth. 3. The moving rail according to claim 1, wherein a stopper member is fixed to a rear end portion of an upper surface of the upper flange portion of the main rail to regulate a loading position of the moving frame. Container trailer. 4. A bracket which projects downward from the bottom of the bolster provided at the rear end and the front end of the moving frame, wherein the lock pin is disposed via the bracket so as to be able to protrude and retract in the vehicle width direction. An engaging member having an engaging hole into which the head of the lock pin is fitted on the frame side is fixed to the traveling position and the cargo handling position of the moving frame, respectively, and the head of the lock pin is fitted into the engaging hole. The container trailer according to claim 1, 2, or 3, further comprising a lock device capable of holding the moving frame at the traveling position and the cargo handling position. 5. A plurality of pairs of grooved rollers of the rolling portion serving as the pivot for rotatably connecting the bearing piece provided at the rear portion of the tilting frame and the rolling portion provided at the rear portion of the moving frame. The container trailer according to claim 1, 2, 3, or 4, wherein the rotation shaft of the rear roller is also used.