JPH0317733B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention relates to a method of stacking bags filled with a melted material such as asphalt emulsion, that is, melt-filled bags, on a pallet for storage or shipping.

"Prior Art" Asphalt emulsion is stored and shipped in paper bags. The paper bags are placed one by one into a metal transport can, and while they are housed in the can, they are sent by a conveyor to an inflator (bag expansion device) where they are forcibly inflated, and then transferred to a filling device by the same conveyor. After being filled with a certain amount of asphalt emulsion in a high temperature molten state, it is sent to a sealing position and sealed by a sewing machine. The paper bags filled and sealed in this way are transferred by a dumping device to a predetermined number N (usually 4) from the transport can onto a metal cooling pallet. Then, the cooling pallets are stacked by a pallet loader and sent to a cooling place or a storage place, where the asphalt milky lotion packed in paper bags is cooled, solidified, and stored.

In addition, when shipping the solidified asphalt packed in paper bags (hereinafter referred to as asphalt filling bags), the stacked cooling pallets are carried out from the cooling or storage area using a pallet conveyor. After the cooling pallets are unstacked by the pallet unloader, the asphalt filling bags are unloaded from the cooling pallets by the depalletizer. After this, for example, in the case of an asphalt filling bag whose length and width are in a 2:1 relationship, the 6
Patterning is performed so that the pieces are combined one by one, that is, four pieces are arranged in parallel and two pieces are arranged in series in a direction orthogonal to this. Then, as shown in Fig. 5, this is stacked on another shipping pallet in multiple stages with the patterning direction alternately reversed between odd-numbered stages and even-numbered stages (the packaging is a so-called interlock pattern). In this state, they are shipped by forklift or the like as needed.

Conventionally, the asphalt filling bags removed from the cooling pallet were stacked again in multiple tiers on the shipping pallet in the following manner.

That is, the asphalt filling bags unloaded from the cooling pallet by the depalletizer are conveyed one by one by a roller conveyor, and the number of bags is counted by a counter. The asphalt-filled bag collided with a turning grid or turn stopper, and the reaction force caused the asphalt filling bag to change direction on the roller conveyor.

"The problem that the invention attempts to solve" As a result, there were the following drawbacks.

Asphalt-filled bags were conveyed on a roller conveyor and changed direction by colliding with turngrids or turnstops, which often caused the paper bag to break due to the impact and expose the solidified asphalt, causing counter counting errors. , and there was also little certainty about the change in direction.

Asphalt filling bags are conveyed one by one on a roller conveyor, and the direction is changed on top of the roller conveyor.
After unloading from the cooling pallet and patterning,
Not only did it take up a lot of work space, but it also took a long time to stack the items on the shipping conveyor again.

The four asphalt filling bags placed in parallel on the cooling pallet had to be separated and transported one by one again, resulting in poor work efficiency.

SUMMARY OF THE INVENTION In view of these conventional drawbacks, it is an object of the present invention to provide a method for stacking asphalt filling bags on shipping pallets by patterning them accurately, without damage, and in a small working space, for example, in an efficient manner. It is to do so.

``Means for Solving the Problems'' In order to achieve such an objective, the method of the present invention uses a predetermined number N of melts loaded on a cooling pallet and transported by a pallet conveyor. Remove the bags from the cooling pallet at the first unloading position.
The N melt-filled bags on the cooling pallet, which were unloaded onto the relay conveyor at the first unloading position and conveyed to the destination without being unloaded at the first unloading position, are transferred to the second relay conveyor at the second unloading position. onto the conveyor.

Next, after turning the N melt filling bags transferred to this second relay conveyor by 90 degrees, the N melt filling bags whose direction has been turned are transferred to the above-mentioned Transfer onto the No. 1 relay conveyor. Then, the n melt filling bags that were transferred by changing the direction and the N melt filling bags that were unloaded from the cooling pallet onto the first relay conveyor are transferred to the first relay conveyor. After being brought together and patterned while being conveyed on a relay conveyor, the (N+n) patterned melt filling bags are stacked on a shipping pallet.

"Function" According to the method of the present invention in which loading is carried out in accordance with the above-described procedure, the N melt filling bags loaded on the cooling pallet are placed at the first unloading position and the second unloading position. on the first relay conveyor and on the second relay conveyor.
They are each transferred as is onto the relay conveyor. The N melt filling bags transferred onto the second relay conveyor are conveyed onto the first relay conveyor in units of n pieces less than N while being turned by 90 degrees, and are already transferred to the first relay conveyor. After being put together with N melt filling bags transferred on a conveyor and patterned as shown in FIG. 4A or B, for example, they are stacked on a shipping pallet in multiple stages as shown in FIG. 5, for example.

Furthermore, in the apparatus of the present invention, the cooling pallet is conveyed by a pallet conveyor, and the N melt filling bags on the cooling pallet are transferred onto the first relay conveyor by the first depalletizer. Then, they are transferred onto a second relay conveyor by a second depalletizer. The N melt filling bags on this second relay conveyor are turned one by one by 90 degrees by the conversion guide roller when being transferred to the infeed conveyor. Then, the in-feed conveyor sends n pieces at a time onto the first relay conveyor. The n melt filling bags and the N melt filling bags that have already been transferred onto the first relay conveyor are aligned by a patterning device and then shipped by a palletizer. stacked on pallets.

``Example'' Next, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a plan view of the entire loading device of the present invention for loading asphalt packed into paper bags and already cooled and solidified (this is referred to as an asphalt filling bag, as described above). This loading device is roughly divided into pallet conveyors (roller conveyors) 1
, the pallet unloader 2, the first and second depalletizers 3, 4, the first relay conveyor (roller conveyor) 5, the second relay conveyor (roller conveyor) 6a, and the second A conversion conveyor (roller conveyor) 6b that continues orthogonally to the relay conveyor 6a, a conversion guide roller 7 arranged at the terminal end of this conversion conveyor 6b, and an infeed conveyor that continues orthogonally to the conversion conveyor 6b. (roller conveyor) 8 and patterning device 9
and a palletizer 10.

For example, the metal cooling pallet 12 on which four asphalt filling bags 11 are mounted in parallel is
A pallet unloader 2 carries the pallets stacked one by one by a pallet conveyor (roller conveyor) 1.
sent to. The pallet unloader 2 has a well-known structure, and lifts the cooling pallets 12 stacked in four stages using a lifter 2a, fixes the second cooling pallet from the lowest stage with a clamp, and then lifts the lowest cooling pallet onto the lifter. It is lowered together with 2a and placed on the roller conveyors 13 on both sides. Then, this cooling pallet is transferred to a roller conveyor 13.
After sending the pallets from the cooling pallets to the conveyor 14 of the first depalletizer 3, the lifter 2a is raised again and the remaining three stages of cooling pallets are placed on the lifter 2a. The second cooling pallet from the lowest stage is fixed, and the lifter 2a is lowered to place only the lowest cooling pallet on the roller conveyors 13 on both sides, and then it is placed on the conveyor 14 of the first depalletizer 3. Repeat the sending action.

The first and second depalletizers 3 and 4 have their conveyors 14 arranged in series along the conveyance direction (left side in FIG. 1) of the roller conveyors 13 on both sides of the pallet unloader 2, but in reality It has essentially the same configuration, but includes a horizontally long plate-shaped scraper 15 that is moved back and forth by a cylinder device (not shown).
The cooling pallet 12 is removed by this scraper 15.
The upper four asphalt filling bags 11 are pushed all at once and transferred onto the first relay conveyor 5 or the second relay conveyor 6a. The cooling pallets 12 sent onto the conveyor 14 are positioned in position by stoppers (not shown).

The cooling pallet 12 transferred as described above onto the conveyor 14 of the first depalletizer 3 is transported to the first depalletizer 3 with the asphalt filling bag 11 placed thereon, or by the scraper 15 as described above.
After being transferred onto the relay conveyor 5 and emptied, it is further sent onto the conveyor 14 of the second depalletizer 4. When the cooling pallet 12 is sent with the four asphalt filling bags 11 mounted thereon, the second depalletizer 4 moves the scraper 15 forward to remove the four asphalt filling bags 11 from the cooling pallet 12. After being transferred onto the second relay conveyor 6a, the empty cooling pallet 12 is discharged to the left in FIG. When it comes, just eject it to the left.

As described above, the cooling pallet 12 carrying the four asphalt filling bags 11 is stopped and positioned one by one on the conveyor 14 of the first depalletizer 3 or the second depalletizer 4 by the stoppers, and the asphalt filling bags are placed one by one. However, the first depalletizer 3 and the second depalletizer 4 do not handle the same number of cooling pallets 12, but have a two-to-one relationship. That is, when the first depalletizer 3 lowers the asphalt filling bag 11 twice, the second depalletizer 4 lowers it once.

The second relay conveyor 6a is installed parallel to the side of the conveyor 14 of the second depalletizer 4,
The four asphalt filling bags 11 unloaded as described above by the scraper 15 of the second depalletizer 4 are directly conveyed to the conversion conveyor 6b side.

Between the second relay conveyor 6a and the conversion conveyor 6b, there is provided a transloading elevating chain conveyor 16 that is raised and lowered to a higher and lower position than the conversion conveyor 6b. When one asphalt filling bag 11 is conveyed onto it from the second relay conveyor 6a, this reloading chain conveyor 16 conveys it a little in the same direction and then descends. The asphalt filling bags 11 are transferred one by one onto the conversion conveyor 6b.

The asphalt filling bags 11 transferred onto the conversion conveyor 6b are conveyed by the conversion conveyor 6b in a direction perpendicular to the second relay conveyor 6a. Since the conversion guide roller 7 is arranged at the inner corner of the conversion conveyor 6b and the infeed conveyor 8, which are perpendicular to each other, the asphalt filling bag 1 transported by the conversion conveyor 6b
When the sheet 1 comes into contact with the conversion guide roller 7, it is guided by the conversion guide roller 7 and transferred onto the infeed conveyor 8 while being turned 90 degrees.

The infeed conveyor 8 is configured such that its front half 8 ₁ and rear half 8 ₂ are driven separately by motors. When the direction of the asphalt filling bags 11 is changed as described above and the two asphalt filling bags 11 are transferred onto the rear half 8 ₂ of the infeed conveyor 8, the rear half 8 ₂ is driven and the two asphalt filling bags 11 are transferred.
is sent onto the first half ₈₁ . Thereafter, _two new asphalt filling bags 11 are transferred onto the rear half 82, and four asphalt filling bags 11 are lined up in series on the infeed conveyor 8.

When the front half 8 ₁ of the infeed conveyor 8 is driven, the two asphalt filling bags 11 above it are
is a patterning lifting chain conveyor 21 disposed midway through the first relay conveyor 5.
sent to the top. This chain conveyor 21 is moved up and down by a cylinder device to a position higher and lower than the rollers of the first relay conveyor 5.
This chain conveyor 21 is at a high position when the two asphalt filling bags 11 are sent by the front half ₈₁ of the infeed conveyor 8, and is driven in synchronization with the front half ₈₁ . Therefore, the two asphalt filling bags 11 are transferred onto the chain conveyor 21 while being lined up in series. Thereafter, as the chain conveyor 21 descends, the two asphalt filling bags 11
is further transferred onto the first relay conveyor 5.

On the other hand, the four asphalt filling bags 11 that have been transferred from the first depalletizer 3 onto the first relay conveyor 5 in parallel as described above are conveyed as they are by the relay conveyor 5. At that time, these four asphalt filling bags 11 are brought together by elastic guide plates 22 arranged on both sides of the relay conveyor 5, and the two asphalt filling bags 11 transferred from the chain conveyor 21 are The asphalt filling bag 11 is then assembled as shown in FIG. 4A or B by the patterning device 9.

That is, the patterning device 9 includes a scraper moved by the guide plates 22 on both sides, the chain conveyor 21, the terminal end of the first relay conveyor 5, and the chains 23 on both sides, as shown in FIGS. 1 and 3. It consists of 24. Then, this patterning device 9 first transfers the four parallel asphalt filling bags 11 transferred from the first depalletizer 3 onto the first relay conveyor 5 to the terminal end thereof by the relay conveyor 5. transport. After that, from the infeed conveyor 8, 2
The asphalt filling bags 11 are transferred in series to the middle of the first relay conveyor 5 via the chain conveyor 21, and the two asphalt filling bags 11 in series are pushed by the scraper 24 until they reach the end. The four asphalt filling bags 11 that are being conveyed in parallel are brought together and sent to the palletizer 10 while being patterned as shown in FIG. 4A. Alternatively, after first transferring two asphalt filling bags 11 in series from the infeed conveyor 8,
The four asphalt filling bags 11 arranged in parallel are conveyed by the relay conveyor 5 and brought together with the two asphalt filling bags 11 arranged in series, and the scraper 2
4 and fed into the palletizer 10 while being patterned as shown in FIG. 4B.

The palletizer 10 includes a transfer plate 26 horizontally slidably mounted on rails 25 on both sides, and a transfer plate 26
The table lifter 27 includes a drive mechanism that slides the table along the rail 25, and a table lifter 27. Transfer board 2
6 is at almost the same height as the first relay conveyor 5, and the six asphalt filling bags 11 that have been pushed and patterned by the scraper 24 as described above are shown by the solid line in FIG. It is transferred as it is onto the transfer plate 26 at the position. When the transfer is detected, the transfer plate 26 moves forward to above the table lifter 27 and then retreats. When retreating, the six asphalt filling bags 1 on the transfer plate 26
1 is fixed in position on the table lifter 27 by a stopper, so that the wooden shipping pallet 28 that has been placed on the table lifter 27 in advance
Reprinted above. After this, the table lifter 2
7 is lowered by a predetermined amount (one stage in terms of the number of loading stages of the asphal filling bags 11).

In this way, 6 asphalt filling bags 11
While the asphalt filling bags 11 are being patterned and loaded onto the shipping pallet 28, the two remaining asphalt filling bags 11 on the rear half ₈₂ of the infeed conveyor 8 are patterned and loaded onto the shipping pallet ₂₈ . ₁
is transferred onto the chain conveyor 21, and further transferred from the chain conveyor 21 onto the first relay conveyor 5 in the same manner as described above.

On the other hand, the four asphalt filling bags 11 on the cooling pallet 12 newly sent to the first depalletizer 3 are transferred to the first relay conveyor while being arranged in parallel as above by the first depalletizer 3. 5, and is conveyed by the relay conveyor 5, and is brought together and patterned by the two serially arranged asphalt filling bags 11 and the scraper 24. The patterning is patterned as shown in B when the previous pattern was 4th A, and patterned as shown in A when the previous pattern was patterned as B. The six asphalt filling bags 11 are then transferred to the transfer plate 26 and stacked on top of the asphalt filling bags 11 already loaded on the shipping pallet 28.

Thereafter, in the same manner, four asphalt filling bags 11 are sent in parallel from the first relay conveyor 5, and two asphalt filling bags 11 are sent in series from the infeed conveyor 8. 4 The patterning shown in FIG. A and the patterning shown in B are alternately performed and stacked on the shipping pallet 28. When the number of stages reaches a predetermined number, the table lifter 27 is lowered and the shipping pallet 28 is transferred onto the shipping conveyor 29 and shipped.

Note that the asphalt filling bag 11 may be patterned in a form other than the above. Furthermore, the present invention can also be applied to bags filled with and solidified with high-temperature melting materials other than asphalt emulsion.

"Effects of the Invention" As is clear from the above description, according to the present invention, for example, asphalt filling bags can be patterned accurately and without damage, in a small working space, and efficiently, and then stacked on a shipping pallet. .

[Brief explanation of drawings]

Figure 1 is an overall plan view of an example of a pallet loading device for carrying out the method of the present invention, Figures 2 and 3 are side views of a portion thereof, and Figures 4A and B.
5 is a plan view of an example of patterning, and FIG. 5 is a perspective view of an example of packaging. 1... Pallet conveyor, 2... Pallet unloader, 3... First depalletizer, 4... Second
depalletizer, 5... first relay conveyor,
6a... Second relay conveyor, 6b... Conversion conveyor, 7... Conversion guide roller, 8... Infeed roller, 9... Patterning device, 1
0... Palletizer, 11... Asphalt filling bag, 12... Pallet for cooling, 28... Pallet for shipping.

Claims (1)

[Scope of Claims] 1. A predetermined number N of melt filling bags loaded on a cooling pallet and transported by a pallet conveyor are unloaded from the cooling pallet at a first unloading position. A first unloading process of unloading onto a relay conveyor, and a second unloading process of unloading onto a second relay conveyor at a second unloading position prior to the first unloading position, The first unloading process and the second unloading process are selectively carried out, and the direction changing process of changing the direction of the N melt filling bags transferred to the second relay conveyor by 90 degrees and a transloading process of transferring the N melted material filling bags whose direction has been changed onto the first relay conveyor in units of n pieces smaller than N; A patterning process in which the bags and the N melt-filled bags, which have been unloaded from the cooling pallet onto the first relay conveyor, are brought together while being conveyed on the first relay conveyor; and the patterning. 1. A method for loading melt-filling bags, the method comprising: stacking (N+n) melt-filling bags on a shipping pallet.