JPS5830844B2 - Pallet unloading device - Google Patents

Description

Detailed Description of the Invention The present invention relates to a pallet loading and unloading device having an endless running belt (chain or belt), and particularly relates to a pallet loading and unloading device for loading and unloading cargo such as cartons and bags onto and from the pallet. Regarding unloading equipment.

Generally, this type of device is called a pallet loader, and is configured to load cargo such as cartons and bags onto a pallet using a complicated lifting and lowering mechanism.

Loading is carried out by lowering the pallet using a lifting mechanism.
The loaded loading pallet is carried out from below.

However, in the conventional pallet loader, after carrying the loaded pallet outside, the empty pallet is placed on the loading platform of an elevator and moved upward to bring it to the upper loading position.

Further, while the empty pallet is being moved up, the loading operation onto the pallet must be stopped, resulting in a lot of wasted working time and a decrease in work efficiency.

This invention takes the above-mentioned points into consideration, and by installing a flexible loading platform on which pallets can be placed between each pair of endless running belts (chains or belts), loading and unloading operations can be carried out continuously. It is an object of the present invention to provide a pallet loading and unloading device that can be operated easily and efficiently.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numerals 10 and 11 indicate outer (second) and inner (first) endless running chenos whose travel is guided in one direction by guide sprockets 1-12 and 13 as guide devices.

Each pair of endless traveling chains 10 and 11 are operated synchronously, and a flexible loading platform 15 is mounted between both endless traveling chains 10 and 11.

The flexible loading platform 15 is attached to the outer endless traveling chain 10 at its leading end and to the inner endless traveling chain 11 at its rear end.

A plurality of flexible loading platforms 15, two in the illustrated example, are mounted at predetermined intervals.

The first endless running chains 1 are arranged opposite to each other at appropriate intervals, and are L-shaped, with a vertical running part 11a extending in the vertical direction and a lateral running part 11b extending in the horizontal direction.
The second endless running chain 10 has a deformed L-shape and consists of a vertical running part 10a and a horizontal running part 10b.

The defined travel paths 10a1 and 10a2 of the longitudinal traveling section 10a extend in the vertical direction with appropriate intervals, and one of the travel paths 10a
a2 extends in the vertical direction at an intermediate position of the lower lateral running path 10b3, and the lateral running path 10b is located below the second endless chain 10.
A partial traverse portion including 2 is formed.

Then, the upper lateral running path 10b1, the short lateral running path 1
0b2 and the lower lateral traveling path 10b3 are the lateral traveling portion 10b.
is formed.

The vertical running path 10a1 of the second endless running chain and the vertical running path 11a1 of the first endless chain are in the same phase, and the guide sprockets at the top of both longitudinal running parts 10a and 11a)
Guide sprockets 12 and 13 are located at the bent portions of the shaft 50 having the shape described above. Guide sprockets 12 and 13 are located at the tips of the lower traverse portions of the shaft 51. The guide sprockets 12 and 13 are respectively attached to the driven shaft 41. There is.

As shown in FIGS. 2 and 3, the flexible loading platform 15 is
A head tray bar 16, a tilt tray 17, and a number of intermediate tray bars 1 arranged in alignment between both tray bars.
8, and a connecting link mechanism 19 that flexibly connects the base side of each tray bar 16°17.18.

Both ends of the head bar 16 and the tilt bar 17 are rotatably supported on pins 20 protruding from the endless running chain 10°11.

As shown in FIGS. 4 and 5, the connecting link mechanism 19 includes a connecting chain 21, mounting wings 23 integrally attached to each connecting plate 21a of the connecting chain 21, and
Each mounting plate 25 is fixed to each mounting wing 23 by fixing means 24 such as bolts and nuts, and each mounting plate 25 is fixed to the base of a bar 16° 17.18 having a U-shaped cross section.

As a result, the flexible loading platform 15 is freely curved in only one direction, and not in the other direction, and each bar 16, 1 of the flexible loading platform 15 is
A pallet is placed on 7°18.

Furthermore, each running path of the endless running chains 10, 11 has the following operating portions.

That is, as shown in FIGS. 6 to 8, the flexible loading platform 1
an upper pallet loading area 31 for placing empty pallets 30 on the flexible loading platform 15; and a loading area 33 extending downward for loading cartons 32 onto the pallets 30 placed on the flexible loading platform 15; In the area, the inner running path 11a2 of the vertical running section of the first endless running chain and the longitudinal running path 10a2 of the longitudinal running section of the second endless running chain are parallel to each other, and the flexible loading platform 15 is extended laterally between them. ), a lower pallet unloading area 36 for unloading the loading pallet 34 loaded with cartons 32 onto a conveyor 35, and the flexible loading platform 15 from which the loading pallet 34 was unloaded has a lower guide sprocket 12, 13, makes a U-turn, and is transferred to the upper pallet loading area 31 through a return path 37 formed within the common plane.

In this way, the endless running chains 10, 11 are run synchronously in one direction.

A carry-in conveyor 38 that guides the carry-in of empty pallets 30 is desired in the pallet carry-in area 31, and the empty pallets 30 conveyed on this carry-in conveyor 38 are accurately supplied onto the flexible loading platform 15 in the pallet carry-in area 31. The supply interval of the empty pallets 30 is appropriately set so that the empty pallets 30 are supplied.

In the pallet loading area 31, the outer endless running chain 10
extends in the horizontal direction, and the flexible loading platform 15 to be transferred to this carry-in area 31 is deployed in the horizontal direction.

An empty pallet 30 is placed on the unfolded flexible loading platform 15.

At that time, in order to place the empty pallet 30 at a predetermined position on the flexible loading platform 15, positioning protrusions and grooves (
(not shown) may also be provided.

The flexible loading platform 15 carrying the empty pallet 30 is then transferred to the loading area 33.

In this loading area 33, both endless traveling chains 1
0 and 11 are parallel to each other at a predetermined interval and run downward synchronously.

When both endless traveling chains 10, 11 travel downward in the loading area 33, the flexible loading platform 15 is kept in the unfolded state and moves downward while being held in a horizontal state.

During this downward movement, the cartons 32 are sequentially loaded onto the pallet 30 by the cargo gripping device 40 (FIG. 6).

The loading pallet 34 loaded with the cartons 32 is separated from the flexible loading platform 15 in the pallet unloading area 36 and is unloaded onto the conveyor 35.

When the loading pallet 34 is discharged onto the transport conveyor 20, the other flexible loading platform 15 is brought into the pallet loading area 17.

In this way, by adjusting the distance between the two flexible loading platforms 15, the cartons 32 can be continuously loaded onto the pallet 30.

On the other hand, the baggage gripping device 40 reciprocates between a baggage gripping position (not shown) and a baggage release position shown in FIG. 6, and places the baggage on the pallet 30 at the baggage release position.

Various types of gripping devices 40 can be used depending on the items to be handled, and manual loading is also possible.

In addition, it is also possible to install a plate or a roller conveyor (both not shown) or the like at the pallet loading area 31, and after receiving the cargo with these, it is also possible to pull out the plate or roller conveyor and place it on the pallet 30. It is.

In this case, it is also possible to use only the pushing device for pressing the cargo without using the cargo gripping device 40.

Next, the loading operation of this invention will be explained.

When the electric motor (not shown) is driven, the driven shaft 41 (Fig. 1) connected to its output side is driven, and the outer and inner endless chains 'io, ii are guided by guide sprockets 12, 13 in one direction. are run synchronously.

When the flexible loading platform 15 is guided to the pallet loading area 31 by this traveling, the empty pallet 30 is transferred in the direction A by the loading conveyor 38 in cooperation with the flexible loading platform 15, and is placed on the flexible loading platform 15. Ru.

With the empty pallet 30 reliably placed on the flexible loading platform 15, the cargo gripping device 40 is operated to place the carton 32 on the flexible loading platform 15 from the direction B.

This loading is carried out as the flexible loading platform 15 moves down the loading area 33, as shown in FIGS. 6 and 7, while the cartons 32 are stacked one after the other.

The loading pallet 34 loaded while moving downward is
The pallet is transferred from the lower pallet unloading area 36 shown in the figure in the direction C, and is unloaded onto the conveyor 35.

At this time, another flexible loading platform 15 is brought to the upper pallet loading area 31, and the next empty pallet 30 is placed on this flexible loading platform 15 in preparation for the next loading operation.

On the other hand, the flexible loading platform 15 that has carried out the loading pallet 34 onto the conveyor 35 is reversed and is transported through the return travel path 37 toward the upper pallet loading area 31.

In this way, when the pallet 30 placed on the flexible loading platform moves downward, cartons 32 are loaded one after another onto the pallet 30, while when the flexible loading platform 15 exits the pallet unloading area 36, the cartons 32 are loaded one after another onto the pallet 30. Since the flexible loading platform 15 is arranged to enter the upper pallet carry-in area 31, loading work can be carried out continuously and wasted working time is eliminated, so that loading work can be carried out with high efficiency.

Since the pallet is loaded while the flexible loading platform 15 is moving downward, the pallet that is the object of the loading operation always moves only downward, and less power is required for the loading operation.

Next, a modification of this invention will be described.

In explaining this modification, FIGS. 1, 6 to 8
Components that are the same as those in the embodiment shown in the drawings are designated by the same reference numerals, and their explanations will be omitted.

In the pallet carrying area 31 shown in FIG. 9, after the empty pallet 15 is carried in, the first stage carton 32A is placed thereon.

After that, when the pallet 30 on which the first-stage cartons 32A are placed is guided by the guide sprockets 12 and 13, and the second-stage cartons 32B are placed thereon, both sides of the cartons 32A are released.

32B, a lateral shift (displacement) corresponding to approximately the radius r of the guide sprockets 12 and 13 occurs (10th
(see figure).

This misalignment of the cartons 32A, 32B in the first and second stages causes a problem when the cartons are stacked in several or multiple stages.

For this reason, a correction pulley device 44 is provided as shown in FIGS. 11 to 13 to prevent misalignment between the carton loading position of the first stage and the carton loading position of the second and subsequent stages. It is something.

The straightening pulley 44 is connected to the upper guide sprocket 12.13.
It has idle sprockets 45 and 46 that correct the radius molecule of the pitch circle diamond.

These idle sprockets 45, 46 are connected to the loading area 33.
On the inlet side of the upper guide sprocket 12, 13
Guide sprocket 1-12,
It absorbs a lateral displacement of approximately 13 radial molecules.

By providing this straightening pulley device 44, after the first stage carton 32A is placed on the empty pallet 30 in the pallet loading area 31 shown in FIG. The first carton is carton 3.
2A, the cartons 32A, 32B, .

In the description of the embodiments and modifications of the present invention, a pallet loading device for loading cartons onto a pallet has been described. It can also be used as a device.

When used as a pallet unloading device, a pallet unloading area 36 formed at the bottom of the pallet loading device
, the loading area 33, and the pallet loading area 31 are a pallet loading area for loading loading pallets 34, an unloading area for unloading cartons from the loading pallets 34, and an unloading area for unloading empty pallets from which cartons have been unloaded. Each is formed as a pallet discharge area.

In this case, the conveyors 35, 30 are operated in conjunction in the opposite direction to that when used as a pallet loading device, and the cartons 32 loaded on the pallet 30 are transferred from the upper pallet unloading area 31 to the load gripping device. 40, etc., and taken out to the outside.

In addition, in the detailed description of the present invention, an endless running chain guided by a guide sprocket has been described, but instead of an endless running chain, an endless running belt, a wire rope, etc. (hereinafter, these are referred to as endless running belts) are used.

) may be used.

When an endless running belt is used, the guide sprocket is replaced by a guide roller or guide sheave (hereinafter referred to as guide roller).

) is used. Further, although the embodiment shows a case where cartons are loaded, cargo such as bag-like articles may be used instead of cartons.

As described above, in the pallet loading/unloading device according to the present invention, the running of the pair of first and second endless running chains or belts is guided by guide devices such as guide sprockets or rollers, A flexible loading platform is installed between both endless running chains, and cartons and bag-like items are loaded or unloaded onto the pallet while the pallet placed on the flexible loading platform passes through the loading/unloading area. This allows loading and unloading operations to be carried out continuously and efficiently.

Therefore, it is possible to eliminate wasted work time and efficiently improve work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the principle of an embodiment of the pallet loading and unloading device according to the present invention, and FIG.
FIG. 3 is a plan view of the flexible loading platform incorporated into the unloading device, FIG. 3 is a diagram showing the attachment part of the flexible loading platform, FIG. 4 is a side view of the flexible loading platform, and FIG. 5 is a diagram showing each bar incorporated into the flexible loading platform. 6 to 8 are partial views of a connecting part, and FIGS. 6 to 8 are diagrams sequentially showing the loading relationship of cartons placed on the flexible loading platform of the pallet unloading device, and FIGS. 9 and 10 are FIG. 11 is a diagram showing the loading relationship of the first and second cartons loaded by the pallet unloading device, and FIG.
A perspective view similar to the figure, and FIGS. 12 and 13 are side views schematically showing modifications of the present invention. 10.11...Endless running chain, 12,13
...Guide sprocket (guide device), 15
...Flexible loading platform, 16, 17, 18...
Tray bar, 30...Pallet, 31...
...Pallet loading (unloading) area, 32.32A, 32B
... Carton, 33 ... Loading (unloading) area, 36 ... Pallet unloading (carrying in) area, 37 ... Return travel path, 40. ...Luggage gripping device, 44...Correcting pulley device.

Claims (1)

[Scope of Claims] 1. A horizontal running section consisting of two running paths extending in the horizontal direction, and a vertical running section consisting of two running paths extending vertically in succession to the horizontal running section. two first endless running bands running in an L-shape are arranged opposite to each other at a predetermined interval, and a lateral running part extends laterally inward or outward in the direction of separation of each of the first endless running bands; and a second endless running belt consisting of a longitudinal running part rising and extending in the vertical direction are installed opposite to each other, and one running path of the longitudinal running part of this second endless running belt is connected to the first running part.
Extending in the longitudinal direction at a position parallel to the inner running path of the longitudinal running section of the endless running zone and spaced apart from the inner running path by a predetermined distance in the extending direction of the lateral running section of the first endless running zone, A flexible loading platform on which a pallet is placed between the belts is installed, and this flexible loading platform is connected to the inner running path of the vertical running section of the first running zone and the longitudinal running path of the second endless running zone parallel thereto. A pallet unloading device characterized in that the pallet loading and unloading device is connected to both endless traveling zones so as to extend laterally between one traveling path of the section. 2. An outer running path of the longitudinal running section of the first endless running zone and a running path on the first endless running zone side of the longitudinal running section of the second endless running zone are provided in the same phase, and The lower traveling path of the lateral traveling section and the lower traveling path of the lateral traveling zone of the second endless traveling zone are provided in the same phase, and some of the guide sprockets that guide each endless traveling zone are attached to a common rotating shaft. A pallet unloading device according to claim 1, characterized in that: 3 forming a partial lateral running part below the second endless running band along the extended tip of the lateral running part of the first endless running band;
The pallet loading and unloading device according to claim 1 or 2, wherein the flexible loading platform moves laterally after reaching the lowest point of the vertical traveling portion of both endless traveling zones. . 4. Pallet loading according to any one of claims 1 to 3, characterized in that a plurality of the flexible loading platforms are mounted at predetermined intervals between the first and second endless traveling zones. device.