JPH1067434A - Unloading device for cargo - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure unloading work in an easy posture at all times irrespective of extension/contraction condition of a conveyor by placing the extendable conveyor of a roller conveyor type connected to a rear part of a working carriage on a parallel lift device, and enabling the adjustment of height of conveying surface. SOLUTION: An extendable conveyor 30 placed on a carrying carriage 40 of a parallel lift device 20 is a roller type conveyor comprising three parts 31 33 connected to each other in a stacked or mutually slidable manner. When the height of a table 21 of the device 20 is made the same as that of a container floor surface 2, the first stage conveyor 31 tilts upward around a rear end according to upward movement of a working carriage 10. In the case where the carriage 10 advances and the conveyor 31 is pulled out, the conveyor 30 is wholly raised and turned into a horizontal state by a transfer carriage 40 to thereby prevent the interference with the device 20. Further, in the case of work when the other conveyors, i.e., the second stage conveyor 32 and the third stage conveyor 33 which are respectively at lower positions by one step are pulled out, the transfer height is adjusted to the height suitable for work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load unloading apparatus suitable for unloading a large number of loads loaded in, for example, a truck luggage compartment.

[0002]

2. Description of the Related Art Conventionally, this type of working device is disclosed in, for example, Japanese Patent No.
No. 8357 discloses a work truck that moves in a truck luggage compartment and a transport conveyor connected to a rear portion of the work truck.

In such a conventional baggage unloading apparatus, a belt conveyor type telescopic conveyor is used as a transport conveyor. Due to its structure, even if it is expanded or contracted, its transport surface hardly changes. The transport height could be kept almost constant.

[0004]

However, when a roller conveyor type telescopic conveyor is used as the transport conveyor, the transport surface changes stepwise when the conveyor is expanded or contracted. For a person, the work height changes depending on the expansion and contraction state, and in some cases, the work is performed while bending down, causing a problem that the workability is significantly reduced.

Therefore, the present invention is an apparatus for loading and unloading luggage using a roller conveyer-type telescopic conveyor, and can always load and unload luggage in an easy posture regardless of the telescopic state of the telescopic conveyor. It is an object of the present invention to provide an apparatus for loading and unloading luggage with good workability.

[0006]

According to a first aspect of the present invention, there is provided an apparatus for loading and unloading luggage, comprising:
A roller conveyor type telescopic conveyor is connected to the rear part of the work vehicle, expands and contracts with the movement of the work vehicle, and its conveying surface changes stepwise as it expands and contracts, and the telescopic conveyor is mounted on a parallel lift device. The height of the transfer surface can be adjusted.

According to this loading / unloading device, even if the transfer surface changes stepwise due to the expansion and contraction of the telescopic conveyor, the change is corrected by operating the parallel lift device, so that the transfer surface can always be easily adjusted. Therefore, it is possible to maintain the height at which it is possible to work in an appropriate posture, and thus it is possible to favorably maintain the workability of the worker working on the side.

According to a second aspect of the present invention, there is provided an apparatus for loading and unloading luggage, comprising: a work cart moving in a luggage compartment; and a telescopic conveyer connected to a rear portion of the work car and expanding and contracting with the movement of the work cart. The conveyor is mounted on a swivel table provided on the transport trolley, and is configured such that the direction of expansion and contraction can be arbitrarily changed.

According to this loading / unloading device, even if the direction of expansion and contraction of the telescopic conveyor at the time of installation and the direction of movement of the work carriage thereafter are shifted, the telescopic conveyor can be turned with respect to the transport trolley on which it is mounted. In addition, the telescopic conveyor always expands and contracts in accordance with the moving direction of the work vehicle, whereby the telescopic conveyor can be smoothly expanded and contracted, and thus the work vehicle can be smoothly moved.

[0010] According to this, even if the traveling direction of the work vehicle changes in the middle, the telescopic conveyor turns following the direction, so that the telescopic conveyor smoothly expands and contracts and the work vehicle smoothly moves at this point. Movement can be secured.

According to a third aspect of the present invention, there is provided an apparatus for loading and unloading luggage, comprising: a work truck moving in a luggage compartment; The cart includes a boom conveyor that can be tilted up and down, and a work table that moves up and down in conjunction with the tilt of the boom conveyor.

[0012] According to the load unloading device, for example, when an operator stands on a work table and transfers the load to the boom conveyor in the luggage compartment, or loads the load on the boom conveyor into the luggage compartment, for example, When the boom conveyor is tilted upward to transfer the luggage at a higher position, the work table also rises in conjunction with this, so the operator only needs to operate the boom conveyor to move the luggage to a height where it can grip the luggage in a comfortable position This makes the loading / unloading device easier to use.

According to a fourth aspect of the present invention, there is provided an apparatus for loading and unloading luggage, comprising: a work truck moving in a luggage compartment; and a telescopic conveyer connected to a rear portion of the work truck and extending and contracting with the movement of the work truck. The carriage is configured to be able to enter the luggage compartment from a table of the parallel lift device positioned at the same height as the floor surface of the luggage compartment.

According to this apparatus for loading and unloading luggage, by moving the table up and down in accordance with the height of the floor of the luggage compartment, the work cart can smoothly enter the luggage compartment, and can smoothly move from the luggage compartment. Can be deported. According to this, for example, when unloading the luggage in the container (luggage compartment) loaded on the luggage carrier or loading the luggage into the container, when unloading the luggage loaded directly on the luggage carrier, or loading the luggage directly on the luggage carrier In cases and in
The difference in height between the container floor surface and the cargo bed floor surface can be easily accommodated, and the applicable range of the loading / unloading device is widened.

As described above, the floor surface of the luggage compartment differs depending on the form of the luggage compartment or the height of the truck, and also differs between when the cargo is empty and when the cargo is loaded, and also varies according to the load weight. However, these can be easily coped with by adjusting the table height of the parallel lift device.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS.
A description will be given based on FIG. The loading / unloading device 1 of the present embodiment is mainly configured by a work vehicle 10 and a telescopic conveyor 30 connected to a rear portion of the work vehicle 10. Details of the work cart 10 are shown in FIG. 1, and details of the telescopic conveyor 30 are shown in FIG.

In FIG. 1, reference numeral 2 denotes a container as a luggage compartment, and reference numeral 3 denotes a truck bed on which the container 2 is loaded. Therefore, the floor of the container 2 is higher than the floor of the carrier 3. Reference numeral 4 denotes a track yard platform, which is one step higher than the road surface 5. This platform 4 includes a platform 4 of a parallel lift device 20 on which a work vehicle 10 is mounted.
A wheel stopper 4a is provided to prevent the wheel from falling.

The work carriage 10 is provided with the parallel lift device 2.
0 is placed on the table 21. The parallel lift device 20 includes the table 21, the base 22, and both 21 and 22.
It comprises a parallel lift mechanism 25 interposed therebetween. The base 22 includes moving wheels 23 to 23 and outriggers 24 and 24 for fixing. The parallel lift mechanism 25 includes two arms 25a, 25a rotatably connected to each other via a fulcrum 25b, and both arms 25a, 25a.
A hydraulic cylinder 25c is interposed between 5a and the table 21 can be moved up and down in parallel by operating the hydraulic cylinder 25c to expand and contract the parallel lift mechanism 25 in the vertical direction.

At the end (left end in the figure) of the table 21, there is provided a crossover plate 21a which can be flipped up and stored as indicated by a two-dot chain line in the figure. The work cart 10 can be moved from above the table 21 into the luggage compartment by hanging over the rear edge of the floor 2, and the table 21 can be moved from the luggage compartment.
You can retreat up.

The work cart 10 includes wheels 11 to 11,
It is configured to be capable of self-running by a drive motor 12. Also. The work cart 10 includes a boom conveyor 13 that can be tilted up and down and a work table 14 that moves up and down in conjunction with the boom conveyor 13.

The boom conveyor 13 includes a hydraulic cylinder 13
It can be tilted using a as a drive source and stopped at an arbitrary tilt angle. The boom conveyer 13 is a belt conveyer having a driving source for conveyance, and its start / stop and tilting operations and the start / stop operation of the work cart 10 (start / stop of the motor 12) are centrally arranged on its side. The operation is performed by operating switches on the operation panel 15.

Although not shown, the work table 14 is supported by a lift mechanism substantially similar to the parallel lift mechanism 25 so as to move up and down in parallel. However, this worktable 14 does not have its own drive source. A chain 16 is hooked between the worktable 14 and the boom conveyor 13,
Thus, the worktable 14 moves up and down in conjunction with the tilting operation of the boom conveyor 13. When the boom conveyor 13 tilts downward as shown by the two-dot chain line in the figure, the work table 14 descends by its own weight, and when the boom conveyor 13 tilts upward as shown by the solid line in the figure, the work carriage 14 attaches the chain 16. To be lifted upward.

A connecting portion 17 for connecting the telescopic conveyor 30 is provided at a rear portion (right end portion in the figure) of the work vehicle 10 configured as described above. The connecting portion 17 has a connecting hole.

As shown in FIG. 2, the telescopic conveyor 30 is mounted on a hand-held type carriage 40 having wheels 41 to 41. The transport vehicle 40 is also a parallel lift device, and includes a turning table 43 that moves up and down in parallel by tilting movement of lift arms 42 and 42 driven by a hydraulic cylinder 45 as a driving source.

The telescopic conveyer 30 is placed on the swivel table 43 of the transport vehicle 40 having such a configuration.
Since the telescopic conveyor 30 is supported on the turning table 43 via the turning shaft 44, the telescopic conveyor 30 can turn in the horizontal direction.
However, it does not have its own drive source for turning.

The telescopic conveyor 30 includes first to third-stage conveyors 31 to 33 of a roller conveyor type which are vertically stacked and slidably connected to each other.
The upper stage first stage conveyor 31 is the middle stage second stage conveyor 32
, And the second-stage conveyor 32 slides in the illustrated left-right direction with respect to the lower third-stage conveyor 33, whereby the telescopic conveyor 30 expands and contracts.

The first stage conveyor 31 is replaced with the second stage conveyor 32
To the left in the figure, and then
By moving the step conveyor 31 leftward in the figure,
The stage conveyor 32 is slid to the left with respect to the third stage conveyor 33 and the second stage conveyor 32 is slid to the leftmost position with respect to the third stage conveyor 33 when the telescopic conveyor 30 is in the most extended state. Becomes

Conversely, as shown in FIG.
Are almost overlapped on the upper side of the second stage conveyor 32, and the state where the second conveyor 32 is almost overlapped on the upper side of the third stage conveyor 33 is a state in which the telescopic conveyor 30 is most contracted. Note that the third-stage conveyor 33 is pivotally supported on the table 43 via the pivot shaft 44.

The first-stage conveyor 31 is independently connected to the second-stage conveyor 32 with the rear end thereof as a fulcrum so that the first-stage conveyor 31 can be tilted in the vertical direction. It is connected to the third conveyor 33 so as to be tiltable in the direction.

At the tip (left end in the figure) of the first stage conveyor 31, a connecting pin 34 is provided so as to protrude downward, and this connecting pin 34 is inserted into the connecting hole of the connecting portion 17 of the work vehicle 10. , The telescopic conveyor 30 is connected to the rear of the work cart 10.

According to the loading / unloading apparatus 1 configured as described above, the unloading operation of the luggage in the luggage compartment is performed according to the following procedure. First, as shown in FIG. 3, the parallel lift device 20 on which the work table 10 is mounted is installed behind the cargo room of the truck close to the end of the platform 4 by hand or using a device such as a forklift. After installation at an appropriate position, the outriggers 24, 24 are operated to fix the parallel lift device 20 at that position.

Next, as shown in FIG. 4, the telescopic conveyor 30 is installed behind the work cart 10. The installation work of the telescopic conveyor 30 is performed by manually moving the carrier 40 from the storage location to a predetermined position. At this stage, the connecting pin 34 provided at the tip of the first stage conveyor 31
Is located above the connection hole of the connection plate 17 provided at the rear of the work vehicle 10.

Next, as shown in FIG.
The table 21 of 0 is raised and positioned at substantially the same height as the container floor 2. To raise the table 21, the cylinder 25c is protruded to operate in the
This is done by extending As the table 21 rises, the work carriage 10 also rises, and the connection pins 34 of the telescopic conveyor 30 are inserted into the connection holes of the connection plate 17 at a stage during the rise, whereby the telescopic conveyor 30 is placed at the rear of the work carriage 10. Be linked.

After the connection, the first carriage 10
As shown, the step conveyor 31 is tilted upward with its rear end as a fulcrum.

When the table 21 is substantially at the same height as the container floor 2, the crossover plate 21 stored above
The operator tilts a downward and hangs it over the container floor 2. Thus, the work cart 10 can move onto the container floor 2.

If the luggage is fully loaded in the luggage compartment, it is necessary to carry out the luggage at a higher position. At this stage, as shown in FIG.
The operator operates the switch on the operation panel 15 and tilts the boom conveyor 13 upward. Then, along with this, the work table 14 is pulled upward in parallel via the chain 16, whereby the worker M automatically rises to a higher position, so that the worker can carry out the work at an appropriate height. It can be carried out. Further, if the boom conveyor 13 is tilted downward so as to sequentially unload the lower luggage, the work table 14 is also gradually lowered by its own weight in conjunction with this, so that the work can always be performed in a comfortable posture. As described above, since the working height (working position) of the worker M changes in conjunction with the vertical movement of the boom conveyor 13, the operation is simple, the workability is good, and the length of the chain 13 is appropriately set. Thereby, the rising distance of the worktable 14 can be set arbitrarily.

In this way, after unloading one line of luggage, the work cart 10 is advanced to the back of the luggage compartment by operating the switch on the operation panel 15 to activate the motor 12. When the work cart 10 moves forward, as shown in FIG. 7, the first stage conveyor 31 of the telescopic conveyor 30 is pulled out forward (to the left in the drawing) while in the upwardly inclined state.

Here, the telescopic conveyor 30 is mounted on the work cart 10
When the extension direction of the telescopic conveyor 30 does not match the forward direction of the work vehicle 10 at the time when the work vehicle 10 is connected to the rear part, the work vehicle 10 advances as described above, and the first-stage conveyor 31 is pulled out. As a result, the telescopic conveyor 30 is turned in the horizontal direction via the turning shaft 44, and the expansion and contraction direction is changed to match the forward direction of the work vehicle 10. As described above, even if the directions of expansion and contraction do not coincide with each other at the time of connection, since the two 10, 30 are connected via the connection pin 34 so as to be relatively displaceable in the horizontal direction, the work vehicle 10
Is automatically adjusted to the forward direction of the work vehicle 10 by the forward movement of the work vehicle 10, whereby the telescopic conveyor 30 can be smoothly expanded and contracted.
Can be moved smoothly.

Further, even when the moving direction of the work cart 10 changes in the middle, the telescopic conveyor 30 is turned by the turning shaft 44 in accordance with the change, and the telescopic direction is corrected.

Next, at the stage when the first-stage conveyor 31 is being pulled out to the second-stage conveyor 32, it is expected that the first-stage conveyor 31 will interfere with the table 21 of the parallel lift device 20 as shown in the figure. Is done. Therefore, as shown in FIG. 8, the hydraulic cylinder 45 of the transport carriage 40 is operated in the protruding direction to raise the table 43 to raise the entire telescopic conveyor 30.
1 is changed to a substantially horizontal state, and the parallel lift device 20 is changed.
Can be avoided.

In this state, the work carriage 10 moves forward and the first
While the step conveyor 31 is pulled out forward, the wholesale operation of the luggage further proceeds. FIG. 9 shows a state where the first-stage conveyor 31 is pulled out most from the second-stage conveyor 32.

At this time, the cargo carried out by the worker M is transferred to the boom conveyor 13 and the first-stage conveyor 31.
Through the second stage conveyor 32. Second stage conveyor 3
2 is one step lower than the first-stage conveyor 31, so that a worker who takes out the luggage that has reached the second-stage conveyor 32 on its side as it is, has a work position lower than that of the first-stage conveyor 31. Therefore, the work is performed in a crouched posture in which the user is bent down, and the workability is reduced. Therefore, even at this stage, the table 4
3 and the telescopic conveyor 30 is raised, whereby the height of the second-stage conveyor 32 can be changed to a height with good workability.

The height of the second conveyor 32 is adjusted as follows.
As described above, the first-stage conveyor 31 is replaced with the second-stage conveyor 32
May be performed not only at the most extracted time, but also gradually from the previous stage.

The work of unloading the luggage proceeds, and the work cart 10
Moves further in the cargo room, as shown in FIG.
The second stage conveyor 32 is moved to the third stage by the movement of the stage conveyor 31.
It is pulled out forward with respect to the step conveyor 33. At this stage, the unloaded luggage reaches the third stage conveyor 33. Third
The stage conveyor is one stage lower than the second stage conveyor 32. Therefore, also in this case, the third cylinder 3
Adjust the transport height of 3 to a height appropriate for the work. Thereby, the worker working on the side can work in a comfortable posture.

When the work of unloading the luggage in the luggage compartment is completed, the work cart 10 is moved backward and moved down onto the table 21 via the crossover plate 21a. The telescopic conveyor 30 is contracted with the retreat of the work cart 10. In the contraction stage, the table 43 of the carrier 40 may be lowered at a timing opposite to the above.

According to the luggage loading / unloading apparatus 1 configured as described above, the table of the transport trolley 40 is moved up and down even if the transport surface changes stepwise as the telescopic conveyor 30 expands and contracts. Thus, the change can be corrected and the transport surface can be maintained at a height that allows the user to always work in a comfortable posture, and therefore, the workability of the worker working on the side can be favorably maintained.

Further, the telescopic conveyor 30 can be turned horizontally via the turning shaft 44 even if the direction of expansion and contraction of the telescopic conveyor 30 at the time of connection and the moving direction of the work vehicle do not coincide with each other. It expands and contracts in accordance with the moving direction of the work cart 10, whereby the telescopic conveyor 30 is smoothly expanded and contracted.
0 smooth movement can be secured.

Further, even if the moving direction of the work vehicle 10 changes in the middle, the telescopic conveyor 30 turns following the change, so that the telescopic conveyor 30 can be smoothly expanded and contracted and the work vehicle 10 can be smoothly moved. Movement can be secured.

Further, when the worker M stands on the work table 14 and transfers the luggage to the boom conveyor 13 in the luggage compartment, for example, when the boom conveyor 13 is tilted upward to transfer the luggage at a high position, The work table 14 is also raised in conjunction with this, so that the worker M can move to a height at which the load can be gripped in an easy posture only by operating the boom conveyor 13, thereby improving the usability of the loading and unloading apparatus 1. Get better.

Further, by raising and lowering the table 21 in accordance with the height of the container floor 2, the work cart 10 can smoothly enter the luggage compartment and can be smoothly retreated from the luggage compartment. . According to this, for example, the height of the container floor surface 2 and the floor surface of the truck bed 3 in the case where the cargo in the container loaded on the truck bed 3 is wholesaled and the case where the baggage directly loaded on the bed 3 is wholesaled. It is possible to easily cope with the difference, and the applicable range of the loading / unloading device 1 is widened.

As described above, the floor surface of the luggage compartment differs depending on the form of the luggage compartment or the height of the truck, and also differs depending on whether the vehicle is empty or loaded, and also changes depending on the load weight. However, these can be easily coped with by adjusting the height of the table 21 of the parallel lift device 20.

Various modifications can be made to the embodiment described above. For example, in order to move the work table 14 up and down in conjunction with the tilt of the boom conveyor 13,
Although the configuration in which the chain 16 is extended between the third and the third 14 is illustrated, the means for interlocking is not limited to the chain 16 and may be, for example, a wire or a connecting rod. When a connecting rod is used, both ends of the connecting rod may be rotatably supported on the boom conveyor 13 and the work table 14, respectively.

Although the case where the present invention is applied to the unloading work of the luggage is illustrated, the illustrated unloading apparatus 1 can also be applied to the case where the luggage is loaded into the luggage room. When it is used for loading, it may be of a type that can be pulled out from the lower conveyor as the telescopic conveyor. Therefore, in this case, the lower conveyor is connected to the work cart 10. However, when using this type of telescopic conveyor,
Since the transport height (the height of the upper conveyor) does not change for the worker working on the side, there is no need to perform the operation of adjusting the transport height as illustrated.

[Brief description of the drawings]

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

FIG. 2 is an overall side view of the telescopic conveyor.

FIG. 3 is a side view showing a state where a work cart is set behind a luggage compartment.

FIG. 4 is a side view showing a state in which a telescopic conveyor is set behind the work cart.

FIG. 5 is a side view of the unloading device at a stage where the work vehicle has been raised to the height of the luggage compartment floor surface.

FIG. 6 is a side view of the loading / unloading apparatus at a stage where the work table is raised by tilting the boom conveyor upward.

FIG. 7 is a side view of the unloading device at a stage where the work vehicle has advanced into the luggage compartment and the first stage conveyor has been pulled out by about half.

FIG. 8 is a side view of the unloading and unloading apparatus at a stage where the table of the transport trolley is lifted and the first-stage conveyor of the telescopic conveyor is corrected in a substantially horizontal position.

FIG. 9 is a side view of the unloading and unloading apparatus at a stage where the first-stage conveyor is most drawn out of the second-stage conveyor.

FIG. 10 is a side view of the loading / unloading apparatus at a stage where the second-stage conveyor is most drawn out with respect to the third-stage conveyor.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Unloading apparatus 2 ... Container 3 ... Truck carrier 10 ... Work truck 13 ... Boom conveyor 14 ... Work table 16 ... Chain 20 ... Parallel lift device 30 ... Telescopic conveyor 31 ... 1st stage conveyor, 32 ... 2nd stage conveyor, 33 ...
Third-stage conveyor 40: transport trolley, 44: revolving axis

Continuation of the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location B66F 11/04 B66F 11/04

Claims (4)

[Claims] A work truck moving in the luggage compartment, and a work truck connected to a rear portion thereof, which expands and contracts with the movement of the work truck;
A roller conveyor type telescopic conveyor whose transport surface changes stepwise when it expands and contracts is provided, and the telescopic conveyor is mounted on a parallel lift device, and the height of the transport surface is adjustable. Loading and unloading equipment. 2. A work carriage moving in a luggage compartment, and a telescopic conveyor connected to a rear portion of the work carriage and extending and contracting with the movement of the work carriage. A loading / unloading apparatus for loading and unloading goods, wherein the apparatus is configured to be mounted and the direction of expansion and contraction can be arbitrarily changed. 3. A work truck moving in a luggage compartment, and a telescopic conveyor connected to a rear portion of the work vehicle and extending and contracting with the movement of the work vehicle, wherein the work vehicle is capable of tilting up and down. A loading and unloading apparatus, comprising: a work table that moves up and down in conjunction with the tilt of the boom conveyor. 4. A work truck moving in the luggage compartment, and a telescopic conveyor connected to a rear portion of the work truck and extending and contracting with the movement of the work truck, wherein the work truck is connected to a floor surface of the luggage compartment. An apparatus for loading and unloading luggage, wherein said apparatus is configured to be able to enter said luggage room from above a table of a parallel lift device located at the same height.