JPH0623852U - Semi-trailer - Google Patents

Abstract

(57) [Abstract] [Purpose] Semi-trailer equipped with self-propelled means [Construction] The present invention provides a self-propelled auxiliary wheel that is movable by power and the above-mentioned auxiliary wheel on an arcuate path centered around a kingpin. A semitrailer that is movably supported and that has means for lifting or lowering the rear wheels of the semitrailer from the ground. [Effect] Since the back of the loading platform can be moved in the left-right direction centering on the kingpin, the number of times the tractor has to be moved and the area required therefor during positioning can be minimized, and loading efficiency can be greatly improved. It was realized.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a semi-trailer for transporting, for example, a large container for sea transportation.

[0002]

[Prior art]

 Conventionally, marine containers are loaded on large ships, especially container-only ships, and are unloaded from the ship to the land with a crane at the container wharf at the port, and then transferred to a trailer for truck transportation. To place a container on the trailer's loading platform, for example, the container is lifted from the ship by a crane, and a semi-trailer is placed below it to transport it on the loading platform.

As shown in FIG. 7, the semi-trailer 30 has rear wheels 32 behind and below the cargo bed 31, and has a king pin 33 and auxiliary legs 34 in front of the cargo bed 31 and a tractor 35. The coupler 36 and the king pin 33 are connected to each other so as to be integrated so that the tractor bears the weight of the load.

[0004]

[Problems to be solved by the device]

 In the conventional semi-trailer, it is necessary to carry the container by a lift truck and place it on the bed of the semi-trailer when loading the container on the bed, or lift the container by a large crane and place the semi-trailer under the container in advance. . At that time, the containers cannot be fixed with one touch except for the fixed position of the loading platform, so the containers must be accurately positioned and stacked.

However, at a wharf or the like, the space for loading containers is limited, and it is not possible to secure a large space for moving the tractor. However, in reality, in order to position the semi-trailer parallel to the container and below the loading platform, the tractor is repeatedly moved forward and backward for alignment. Therefore, not only a large space is required to move the tractor forward and backward, but also work efficiency is reduced due to repeated forward and backward movements, and improvement is desired.

In the present invention, a self-propelled auxiliary wheel and a mechanism for moving the rear wheel up and down are attached to the rear of the rear wheel, whereby the semi-trailer moves on an arc centered around the kingpin. The purpose is to provide a means for moving the loading platform in the left and right directions.

[0007]

[Means for Solving the Problems]

 The present invention is a semi-trailer equipped with a kingpin at the front end of the luggage carrier and a rear wheel at the rear portion, and is fixed to and supported by brackets having spindles on both sides of the luggage carrier frame behind the rear wheels. The frame is pivotally supported, and a motor is attached below the support frame, and an auxiliary wheel is fixed to the output shaft of the frame. On the other hand, the rear end of the cylinder is pivotally supported by the cargo frame, while the tip of the piston rod is supported. Is fixed to the support frame, and the support frame is formed to be movable up and down by the cylinder. Further, the support frame is integrated by an arm.

[0008]

[Function of the device]

 The semitrailer of the present invention engages the coupler of the tractor with the kingpin of the semitrailer to connect them. If the semi-trailer is located in front of the container and the container and semi-trailer are not in parallel, the cylinders can be operated by operating the auxiliary wheels that are floating from the ground on the loading side, that is, in the storage position, from the cabin. Therefore, the auxiliary wheel comes into contact with the ground when the frame at the tip of the cylinder rod descends.

Further, since the support frame is integrated by the arm, the auxiliary wheels on both sides are simultaneously moved up and down.

Further, if the cylinder continues to operate downward, the rear wheels of the semi-trailer are lifted from the ground by the torque of the cylinder. When the motor is driven in that state, the auxiliary wheel rotates and the auxiliary wheel self-propels in an arc centered on the kingpin.The semitrailer moves left and right around the kingpin depending on the rotation direction of the auxiliary wheel. Be touched.

That is, by rotating the motor in the normal direction or in the reverse direction, the rotation direction of the auxiliary wheels can be changed and the semi-trailer can be moved in the left-right direction. The semi-trailer can be placed in a position parallel to the container with respect to the traveling direction without changing, and the container can wrap around from the side of the container to the bottom.

Then, when the alignment is completed, the cylinder is operated in the direction opposite to the direction in which the cylinder is loaded, and when the frame is moved up to the original storage position, the auxiliary wheels are lifted and the rear wheels of the semi-trailer are lifted again. Ground. After loading the container, it can be used for normal trailer transportation.

[0013]

【Example】

 1 to 5 are a side view, a plan view, a side view showing a main part, a plan view and a rear view showing an embodiment of the semitrailer of the present invention. The semi-trailer 1 includes a rear wheel 3 similar to a conventional semi-trailer on the lower rear side of the luggage frame 2, a king pin 4 on the tip of the luggage frame 2, and an auxiliary wheel 5 behind the rear wheel 3. is doing.

The auxiliary wheel 5 may be driven by a motor 9 fixed to a support frame 8 rotatably supported by a support shaft 7 of a bracket 6 fixed on both sides of the rear carrier frame 2. Is fixed in a direction different from that of the rear wheel 3, for example, in a direction orthogonal to the rear wheel so that it can move on a turning locus about the king pin (see FIG. 6).

Further, the motor 9 includes a well-known driving means such as a geared motor having a built-in reduction gear or a separately prepared reduction gear with an auxiliary wheel attached to the output shaft for driving.

Further, a bracket 12 is fixed to the tip of a piston rod 11 such as a hydraulic or pneumatic cylinder 10 at one end of the support frame 8, while a bracket 12 for fixing the rear end of the cylinder 10 is fixed to the rear carrier frame 2. The bracket 13 is fixed.

The support frame 8 is integrally connected by the arm 14. By the way, the motor 9 and the cylinder 10 are remotely operated from the driver's seat of the tractor 20 by a well-known procedure.

Although not illustrated, the present invention supports a self-propelled auxiliary wheel that is movable by power, and the auxiliary wheel that is movably supported on an arcuate rotation locus about a kingpin. Further, those having means for lifting or lowering the rear wheels of the semitrailer from the ground are included in the scope of the invention.

[0019]

[Effect of device]

 The present invention, when loading in a limited place such as a container wharf, only needs to move to the left and right behind the platform around the kingpin of the semitrailer, and the number of tractor movements (distance) and the area required for that. It was possible to minimize the load, and the efficiency of the loading operation was greatly improved. In addition, the present invention can use the same loading platform as in the production of conventional semi-trailers, and can add the above-mentioned self-propelled auxiliary wheels to the semi-trailers currently in use. It is a useful idea for industrial use, such as realizing a semi-trailer.

[Brief description of drawings]

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

FIG. 2 is a plan view of the same.

FIG. 3 is a side view showing an enlarged main part of the present invention.

FIG. 4 is a plan view of the same.

FIG. 5 is a rear view of the same.

FIG. 6 is an explanatory view showing a usage state of the present invention.

FIG. 7 is a perspective view showing a conventional example.

[Explanation of symbols]

 1: Semi-trailer 2: Loading frame 3: Rear wheel 4: King pin 5: Auxiliary wheel 6: Bracket 7: Spindle 8: Support frame 9: Motor 10: Cylinder 11: Piston rod 12: Bracket 13: Bracket 14: Arm 20: motor

Claims (2)

[Scope of utility model registration request] 1. A semitrailer having a kingpin at the front end of a luggage carrier and a rear wheel at the rear portion thereof, wherein brackets having spindles on both sides of a luggage carrier frame rearward of the rear wheels are fixed and supported by the spindle. The frame is pivotally supported, and a motor is attached below the support frame,
Auxiliary wheels are fixed to the output shaft, while the rear end of the cylinder is pivotally supported on the carrier frame, and the tip of the piston rod is fixed to the support frame, and the support frame is vertically movable by the cylinder. A semi-trailer characterized by what it has done. 2. The semitrailer according to claim 1, wherein the frame is integrated by an arm.