JPS6148456B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a container trolley for the purpose of transferring containers placed on a truck.
In particular, it relates to a car body that can expand and contract to an extremely large extent.

Transportation by truck has been increasing in recent years, but loading and unloading cargo from trucks has become a problem. These problems include: (1) The truck itself and its driver are idle during loading and unloading operations.

(b) Loading and unloading operations tend to be concentrated during temporary periods, requiring concentration of labor;
At other times, those labor forces become surplus.

C. Loading and unloading operations require waiting time for each truck, making the delivery area more likely to become crowded and requiring a large area.

(d) The waiting time for trucks at each point of departure and arrival increases, and the round trip cycle time for trucks becomes longer.

E. With the spread of the five-day week, trucks will be out of operation for two days if they are loaded on the eve of a holiday.

etc.

In order to solve these problems, a container-type transportation method has been used in which a removable container is placed on a truck, and only that container is loaded and unloaded at a departure point and a destination. In this method, cargo is loaded into a container in advance, and once the truck arrives at the work site, the cargo replacement work can be completed within a short period of time when the container is transferred.

In this container-type transfer method, a forklift or crane is used to load and unload containers onto the truck bed, and there are many ways to lower or lift containers using these. It has been adopted. In order to lift a container using a forklift, a crane, etc., the strength of the container must be increased, which has the drawback of increasing the container's own weight and increasing its price. Furthermore, since a forklift can only lift a container from the side, a large area is required to lift and move the container with a forklift, and a dedicated operator is also required. Furthermore, containers loaded and unloaded by forklifts cannot be moved, and once unloaded, containers have the disadvantage of interfering with other operations.

Another method is to provide fixed legs that can move up and down at the four corners of the container, to lift the container using the fixed legs, and to disconnect the truck in the lifted state. However, this method has the disadvantage that the weight of the container becomes heavy, and after being separated, the container cannot move on its own and is fixed in place, making it inconvenient for later maintenance work.

For this reason, a trolley has been proposed in which the entire length of the vehicle is extendable and retractable, wheels are pivotally supported at the four corners of the vehicle body, and containers are transferred by extending and contracting the vehicle body. However, the amount of expansion and contraction of the car body is limited due to its structure, and it cannot be expanded very much, which has the disadvantage that it has to be expanded and contracted many times during container transshipment work. Further, even when the trolley is reduced in size and stored, its entire length can only be expanded and contracted to a certain limit, making it bulky.

In view of the above-mentioned drawbacks, the present invention provides a container truck whose body is constructed of a plurality of frames and pantograph links, and whose body can expand and contract to a large extent.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing this embodiment, and the vehicle body includes a front frame 1, a middle frame 2, a rear frame 3,
It is composed of pantograph links 4 and 5 that connect each frame 1, 2, and 3. Each link 4,
Each of the link levers 5 consists of four elongated link levers 6, 7, and the two link levers 6, 7 are connected in an X-shape at the center by support shafts 8, 9. The two sets of link levers 6, 7 configured in an X shape are arranged vertically with an interval, and one end of each link lever 6, 7 is attached to a pin 10, 11, 12 on the frame 1, 2, 3, respectively. They are connected by Pin 1 of frame 1, 2, 3
Frames 1, 2, 3 are on the opposite side of 0, 11, 12.
Slide grooves 13, 14, 15 are formed along the length direction, and the other ends of the link levers 6, 7 are connected to the slide grooves 13, 1 by pins 16, 17, 18.
4 and 15 are engaged. Wheels 19 and 20 are pivotally supported on both sides of the frame 1 and the rear frame 3, respectively, and rollers 21, 22, 23, and 24 are mounted horizontally on the upper surface of each frame 1, 2, and 3 so as to be parallel to each other. It is pivoted. Each roller 21
24 are approximately parallel to the length direction of the frames 1 to 3 and have the same height, and the lower surface of the container is transferred by the upper surface thereof. Further, a shaft rod 25 is pivotally supported at the center of the middle frame 2 facing toward the rear frame 3, and the tip of the shaft rod 25 serves as an engagement mechanism that removably engages with the container surface. 26 is fixed. A lever 27 is swingably supported on the side surface of the middle frame 2.
The lever 27 and the shaft 25 are connected by a rod 28. Next, elevating legs 29 for fixing the vehicle body are fixed on both sides of the rear frame 3, and a differential device 30 for transmitting rotation to the wheels 20 and a power source are provided on the lower surface of the rear frame 3. A hydraulic motor 31, a hydraulic pressure generator 32, a battery 33, etc. are attached. Furthermore, a hydraulic cylinder 34 is attached to the center of the rear frame 3 as a telescoping mechanism for expanding and contracting the pantograph links 4 and 5.
is connected to the support shaft 9.

Next, the operation of this embodiment will be explained.

In order to operate this container truck, first, the hydraulic pressure generator 32 generates hydraulic pressure. The hydraulic pressure generator 32 is driven by the voltage supplied from the battery 33 (the hydraulic pressure generator 32 may be driven by a gasoline engine, etc.), and the wheels 20 can be rotated by supplying this hydraulic pressure to each part of the truck. , the elevating legs 29 can move up and down, and the hydraulic cylinder 34 can extend and contract. The hydraulic cylinder 34 is contracted, and the cylinder rod 35 is connected to the hydraulic cylinder 3.
4, the support shaft 9 is drawn toward the rear frame 3, and the link levers 6, 7 rotate around the support shafts 8, 9. The pantograph links 4, 5 are folded by the link levers 6, 7, and the pins 16, 17, 18 slide within the sliding grooves 13, 14, 15. When the container truck is reduced in size in this manner, it is in the state shown in FIG. 2. At this time, the engagement piece 26 is located on the left side of the rear frame 3.

In order to extend the container truck, the hydraulic cylinder 34 is extended and the cylinder rod 35 is extended.
By protruding from the hydraulic cylinder 34, the opposite operation to that described above is performed, and the pantograph links 4 and 5 are expanded. FIG. 3 shows the cart in its fully extended state.

Next, the process of transferring the container 37 from the container truck 36 to the container trolley 38 will be explained in order with reference to FIG. The container truck 36 is capable of removably mounting a box-shaped container 37, and has a plurality of rollers (not shown) pivoted on the top surface of the loading platform, and is configured to be able to move the container 37 in its length direction. It is becoming. When the container truck 36 transports the container 37, the container 37 can be fixed to the loading platform by a mechanism not shown.

(A) Move the container truck 36 to a predetermined position, maintain it in a horizontal state, and fix it. The container truck 38 is moved so that the rear frame 3 comes into contact with the rear end of the container truck 36. In moving this container trolley 38, hydraulic pressure is applied to the hydraulic motor 31.
The rotation of the hydraulic motor 31 is transmitted to the wheels 20 via the differential device 30, and the container truck 38 is moved. Steering during movement is performed by changing the direction of the wheels 19 using hydraulic cylinders (not shown).

(B) Container truck 36 and container trolley 38
If they make contact, the lifting legs 29 are lowered and the container trolley 38 is fixed. container truck 36
Release the fixing mechanism of the container truck 36.
and container 37, and then lever 2
7, the shaft 25 is rotated by the rod 28, and the engagement piece 26 is hooked to the rear of the container 37. Then, the hydraulic cylinder 34 is extended to cause the cylinder rod 35 to protrude, thereby enlarging the pantograph links 4 and 5. Therefore, the shaft rod 25 and the engaging piece 26 move rightward, and the hooked container 37 is moved in the direction of the container truck 38. Since the rollers 21 to 24 are pivotally supported on the upper surface of the container truck 38, the lower surface of the container 37 contacts the rollers 21 to 24 and is lightly transferred.

(C) When about half of the length of the container 37 has been transferred onto the container trolley 38, the engagement between the engagement piece 26 and the container 37 is released by operating the lever 27, and then the hydraulic cylinder 34 is retracted. to shorten the length of the container trolley 38.

(D) Once the container trolley 38 has been reduced to the minimum length, operate the lever 27 to engage the engaging piece 26 with the center of the lower surface of the container 37, and extend the hydraulic cylinder 34 again to move the container 37 into the container. 38. Engagement piece 2
6 moves to a predetermined length, container 3
7 will be completely transferred onto the container trolley 38.

(D) Next, by raising the lifting legs 29, the fixation of the container truck 38 is released, and by activating the hydraulic motor 31, the container truck 38 is driven by itself with the container 37 placed thereon, and the container truck 38 is moved. Move away from 36.

In the manner described above, the container 37 can be transferred from the container truck 36 to the container trolley 38. To transfer the container 37 from the container trolley 38 to the container truck 36, follow the above (A)~
Just do it in the reverse order of (E).

In addition, in this embodiment, the pantograph type link 4,
Although the hydraulic cylinder 34 is used as the telescoping mechanism for expanding and contracting 5, the present invention is not limited to this embodiment, and other conventionally known configurations may be used. For example, the wheels 19 are provided with a drive mechanism, the wheels 20 are fixed, and by driving only the wheels 19, only the wheels 19 and the front frame 1 are driven by themselves, and the length of the container trolley 38 is expanded or contracted. It's okay.

Furthermore, although the engagement piece 26 is used as the engagement mechanism in this embodiment, a pin or bolt that protrudes from and retracts from the lower surface of the container 37 may also be used.

Since the present invention is configured as described above, the length of the container trolley can be expanded and contracted, and containers can be transshipped by the expansion and contraction operation. Since a forklift is not used for this container transshipment, there is no need for a large area for the forklift to move, and there is no need for dedicated workers. Further, since a pantograph type link is used as a mechanism for extending and contracting the container trolley, the mechanism is simple, and the amount of extension and contraction is extremely large, making it easy to transship containers.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is a side view showing a state in which the full length of the same as above has been shortened, FIG. 3 is a side view showing a state in which the full length of the same as above has been extended to the maximum, and FIG. 4 is an explanatory diagram showing transshipment of the container. 1, 2, 3... Frame, 4, 5... Pantograph type link, 19, 20... Wheel, 26... Engagement piece as an engagement mechanism, 34... Hydraulic cylinder as a telescopic operation mechanism.

Claims (1)

[Claims] 1 A vehicle body consisting of a plurality of frames and a pantograph link interposed between each frame to connect the frames in an expandable and contractable manner, wheels that are installed on the underside of at least two or more frames and can run on the road surface, and each frame. Consisting of rollers provided horizontally on the top surface, an engagement mechanism provided on at least one frame and removably engaged with the bottom surface of the container, and a telescoping mechanism that expands and contracts the pantograph link, After the bottom surface of the container is brought into contact with the rollers and engaged with the bottom surface of the container by the engagement mechanism, the distance between each frame is varied by expanding and contracting the pantograph type links by the telescoping mechanism, and the container is moved onto the rollers. A container trolley that is characterized by being able to transfer containers by rolling it.