JPH0140787Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a semi-trailer towed by a tractor, and more particularly to a semi-trailer equipped with a lifting device that allows the loading platform to move up and down.

[Prior Art] Conventionally, loading a large number of cargo onto a trailer requires a lot of labor and time, and especially when handling a large number of heavy objects, it is not only dangerous, but also reduces work efficiency. It was bad. Therefore, a work method using a cargo handling device as shown in FIG. 12, which can easily load heavy objects, has been adopted. In this working method, a load 1 (for example, iron coil material) to be transported is loaded in advance on a pallet 2 having a gate-shaped frame. And tractor 3
A semi-trailer 4 connected to the pallet 2 enters between the gate-shaped frames of the pallet 2 and positioning is performed.
After that, the loading frame 4a of the semi-trailer 4 is
The pallet 2 loaded with the cargo 1 is lifted by the lifting device 5 provided below the platform frame 4a, and is lifted by the platform frame 4a. Then, the pallet 2 is transported while being lifted by the platform frame 4a.

[Problems to be solved by the invention] However, in the above-mentioned cargo handling work, in order to make it easier for the semi-trailer to enter the pallet, if the inner width of the pallet is widened too much, if the semi-trailer enters the pallet lopsidedly, the semi-trailer's The position of the center of gravity changed significantly, which could cause problems with driving. Therefore, the inner width of the pallet cannot be made much wider than the width of the semi-trailer. Therefore, the gap in the width direction between the incoming semi-trailer and the pallet is necessarily kept narrow, and if the semi-trailer turns even slightly and approaches the pallet, the semi-trailer will collide with the pallet, causing damage to the vehicle body and pallet. Problems were occurring frequently.

Therefore, when inserting a semi-trailer into a pallet, it is necessary to insert the semi-trailer into the pallet with the center axis of the semi-trailer substantially aligned with the center axis of the pallet, which requires advanced driving skills.

Therefore, an object of the present invention is to provide a semitrailer equipped with a device that allows the semitrailer to easily enter the pallet while preventing damage due to interference between the semitrailer and the pallet.

[Means for Solving the Problems] The semi-trailer with guide rollers of the present invention that meets this purpose has a width that allows entry between the gate-shaped frames of a pallet having gate-shaped frames on which cargo is loaded,
In a semi-trailer that has a height and is equipped with a lifting device that lifts the pallet when traveling, a side surface of the cargo bed frame of the semi-trailer is provided so that when the semi-trailer enters between the gate-shaped frames of the pallet, the semi-trailer collides with the pallet. It consists of a plurality of guide rollers that guide the direction of movement.

[Function] In the semi-trailer with guide rollers configured as described above, a plurality of guide rollers are provided on the side of the semi-trailer bed frame, so even if the semi-trailer approaches the central axis of the pallet at a bend, the guide rollers will not move. By hitting the pallet, the semitrailer's advancing direction is forcibly corrected, and the semitrailer is stopped within the pallet in an accurately positioned state.

Further, since the guide roller is rotatable relative to the platform frame, the frictional resistance caused by contact between the guide roller and the pallet is reduced, and the semi-trailer is smoothly guided into the pallet.

Therefore, there is no direct interference between the side surface of the semi-trailer bed frame and the pallet, and damage to the vehicle body and pallet due to interference is prevented.

[Embodiments] Hereinafter, preferred embodiments of the semi-trailer with guide rollers of the present invention will be described with reference to the drawings.

1 to 5 show a semi-trailer with guide rollers according to an embodiment of the present invention.
In the figure, 6 indicates a tractor, and a semi-trailer 8 is coupled to a coupling machine 7 of the tractor 6. The semi-trailer 8 is provided with a plurality of running wheels 9 (tires), and some of the running wheels have a structure that allows them to turn.

These wheels 9 are connected to an axle 1 as shown in FIG.
A lifting device 1 is provided between the axle 10 and the platform frame 11 to allow the wheels 9 to move up and down. The lifting device 12 has an arm 13 attached to the axle 10 side, and an arm 14 attached to the loading platform frame 11 side.
One end portions of both arms are connected to each other by a pin portion 15. Arm 13 and Arm 14
A hydraulic cylinder 16 is provided between the
The arm 13 can swing vertically about the pin portion 15 as a fulcrum by the operation of the hydraulic cylinder 16. That is, the wheel 9 is connected to the hydraulic cylinder 16
It is possible to move up and down using the thrust of the Furthermore, as shown in FIG. 2, an elevating device 17 that can move up and down in synchronization with the wheels 9 is provided at the front of the semitrailer, that is, near the connection to the tractor 6.

Four guide rollers 18 are provided on both sides of the platform frame 11, that is, on the side surfaces of the left and right side members 11a of the platform frame 11, respectively. The guide roller 18 is connected to the side member 11
It is arranged in a notch 11b formed in a,
The outer peripheral surface of the guide roller 18 is connected to the side member 11
It protrudes somewhat from the side surface of a (distance L ₁ ). A shaft 19 is inserted through the guide roller 18, and both ends of the shaft 19 are supported by bearing plates 20 fixed to the side member 11a. The shaft 19 is prevented from coming off by, for example, a split pin 19c inserted into a large diameter portion 19a and a small diameter portion 19b formed at the upper portion. A bearing member 18a such as a bearing or a bearing metal is housed in the guide roller 18, and smooth rotation with little friction is possible. Then, the guide roller 18, shaft 19, bearing plate 20, and side member 1
The notch 11b of 1a has enough rigidity to forcibly correct the traveling direction of the semi-trailer 8.

In this embodiment, the number of guide rollers 18 installed is four on each side, but it is desirable to provide them as appropriate depending on the length of the platform frame 11.

Next, the structure of the pallet loaded on the semi-trailer with guide rollers of the present invention will be explained. 6 to 8 show the pallet 21, which is formed into a gate-shaped frame structure by main members including pillars 22 and upper cross beams 23. As shown in FIG. A floor member 24 such as a striped steel plate is provided on the upper surface of the upper cross beam 23, on which cargo 25 can be loaded. In this embodiment, luggage 2
5 can carry, for example, five 24-ton iron coils. The opening of the gate-shaped frame of the pallet 21 is large enough to allow the loading platform frame 11 of the semi-trailer 8 to enter, and guide roller cover plates 26 are attached to the left and right pillars 22 inside to guide the approach direction of the semi-trailer 8. It is being This guide roller cover plate 26 is adjusted to the height of the guide roller 18 when the semi-trailer 8 enters, and the width L ₂ between the left and right guide roller cover plates 26 is wide and deep from the entry side of the semi-trailer 8. It gets narrower as you go. That is, the pallet 21 has a structure such that the longitudinal center axis A of the pallet 21 and the center axis B of the semitrailer 8 can almost match when the semitrailer 8 completes entering into the pallet 21 in order to improve the center of gravity of the semitrailer 8. It's getting old. In addition, the floor member 24 on the upper surface of the pallet 8 has a side frame insertion hole 24 into which a side frame (not shown) for fixing the cargo 25 is inserted.
a etc. are provided.

The operation of the semi-trailer with guide rollers configured as described above will be explained.

First, the sequence of cargo handling operations using a semi-trailer with guide rollers will be explained with reference to FIGS. 9 to 11. FIG. 9 shows the semi-trailer 8 being pulled by the tractor 6 before it enters the pallet 21. As shown in FIG. In this case, the rear end of the semi-trailer 8 may be positioned so that it can almost enter between the gate-shaped frames of the pallet 21. next,
The semi-trailer 8 is moved backward by the tractor 6, and the platform frame 11 is moved into the pallet 21.
Since the opening width of the portal frame on the entry side of the pallet 21 is wide, the platform frame 11 of the semi-trailer 8 can easily enter the pallet 21, and if the semi-trailer 8 enters in a straight line, the platform frame 11 will be in the specified position. It approaches the position and stops.

As shown in FIG. 10, if the approach angle α of the semi-trailer 8
If there is a large deviation from the guide roller 18,
is entered while hitting the guide roller contact plate 26 of the pallet. That is, the semi-trailer 8 is forcibly aligned with the central axis B of the semi-trailer 8 and the pallet 21.
While the position is corrected in the direction in which the center axis A of

When the positioning of the semi-trailer 8 with respect to the pallet 21 is completed in this way, the elevating devices 12 and 17 of the semi-trailer 8 are operated as shown in FIG.
It will be higher than when entering inside. As a result, the pallet 21 rises above the ground 27, and the pallet 21 is supported only by the platform frame 11 of the semi-trailer 8. When the completion of floating of the pallet 21 is confirmed, the cargo handling operation is completed and the vehicle is ready to travel.

Therefore, when the semi-trailer 8 enters the pallet 21, if the rear end of the semi-trailer 8 is aligned between the portal frames of the pallet 21, the progress of the semi-trailer 8 will be maintained even if the entering direction is curved. The direction is automatically corrected and the palette 21
is loaded onto the semi-trailer 8 at a precise position.

[Effect of the invention] As explained above, when using the semi-trailer with guide rollers of the present invention, a plurality of guide rollers for guiding the semi-trailer in the advancing direction are provided on the side of the semi-trailer loading frame, so that the semi-trailer is guided in the advancing direction. can be automatically corrected, and even a person without advanced driving skills can easily load pallets onto a semi-trailer in an accurate position.

Further, since the semi-trailer is smoothly guided into the pallet by the guide rollers, no excessive force is applied to the pallet, and damage to the pallet and semi-trailer due to interference can be prevented.

As a result, the loading operation can be carried out quickly and the loading operation time can be shortened compared to the conventional method.

[Brief explanation of the drawing]

Figure 1 is a plan view of a semi-trailer with guide rollers according to an embodiment of the present invention, Figure 2 is a front view of Figure 1, Figure 3 is an enlarged view of the wheel lifting device in Figure 1, and Figure 4. is a partially enlarged view of Figure 2, and Figure 5 is a partial enlarged view of Figure 4.
6 is a plan view of a pallet loaded on the semi-trailer with guide rollers of the present invention,
Figure 7 is a front view of Figure 6, Figure 8 is a side view of Figure 7, Figures 9 to 11 are schematic diagrams of pallet loading work using the semi-trailer with guide rollers of the present invention, and Figure 12 The figure is a schematic diagram of pallet loading work using a conventional semi-trailer. 8... Semi-trailer, 11... Loading platform frame,
12, 17... Lifting device, 18... Guide roller, 21... Pallet, 26... Guide roller backing plate.

Claims (1)

[Scope of utility model registration request] In a semi-trailer, which has a width and height that allows the pallet to enter between the gate-shaped frames of a pallet having a gate-shaped frame on which cargo is loaded, and is equipped with a lifting device that lifts the pallet during travel, a semi-trailer is provided on the side of the loading platform frame of the semi-trailer. A semi-trailer with guide rollers, characterized in that a plurality of guide rollers are provided for guiding the traveling direction of the semi-trailer by contacting the pallet when the semi-trailer enters between the portal frames of the pallet.