JPH0436973B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a pallet loading device for loading small items in multiple stages on a pallet via separate sheets, for example. .

(Prior Art) Conventionally, when small items such as cans are loaded on a pallet in a separate state, a separate sheet is interposed between the items in each tier. In this case, separate sheets are used because if the tops of the items on the lower tier are exposed, the unevenness on the top of the items will become an obstacle when transferring the items on the upper tier. A similar problem occurs when unloading one tier at a time, so this is a countermeasure for this problem.By placing a separate sheet on top of the transferred items, the support surface for the next upper tier of items is flattened. , In this state, the items on the upper row are transferred.

(Problem to be solved by the invention) By the way, if the product is a can or the like, it has an appropriate height, so the number of loading stages is about ten or so at most, and the weight is also appropriate. , it is effective to place a separate sheet on top of the items on the lower tier even if they are close to the top tier, but for example,
If the item is a ring made of synthetic resin, the height is extremely low, so the number of loading stages is over 100, and the weight is also extremely light, so it is easily affected by warping or wrinkles of the separate sheet. There is a problem in that the upper surface of the separate sheet becomes undulating or tilted as it approaches the top layer, making it ineffective for placing the separate sheet and making it difficult to stack items in multiple layers.

The present invention has been made in view of these points, and it is an object of the present invention to provide a pallet loading device that can reliably load even items that are extremely low in height or extremely light in weight. be.

(Means for Solving the Problems) The pallet loading device of the present invention is a loading device that loads items R onto a pallet P in multiple stages via separate sheets S, and supports the pallet P. A pallet lifter 2 that moves up and down, a receiving member such as receiving plates 6, 7, 8, 9, which is provided on the upper periphery of the pallet lifter 2 so as to be retractable to the outside and supports the periphery of the separate sheet S; The pallet is provided on the members 6, 78, 9 so as to be movable forward and backward, and in the extended state presses the peripheral portion of the separate sheet S onto the receiving members 6, 7, 8, 9, and holds the separate sheet S on the pallet located below. A presser member, for example, presser plates 11, 12, 1, which is held in a substantially horizontal state while being spaced apart from P and the article R.
3, 14 and this pressing member 11, 12, 13, 1
A supply section for the article R provided on the outside of 4, for example, a layer section 5, and the separate sheet S held by the receiving members 6, 7, 8, 9 and the pressing members 11, 12, 13, 14. , a transfer body, such as a carriage 21, for transferring the article R from the supply section 5.

(Function) The pallet loading device of the present invention moves the peripheral portion of the separate sheet S to the receiving member 6, directly above the pallet P lifted by the pallet lifter 2.
7, 8, 9 in a substantially horizontal manner, and the peripheral portion of this separate sheet S is held down by a pressing member 11,
By pressing and holding the separate sheet S against the receiving members 6, 7, 8, and 9 with 12, 13, and 14,
The lower pallet P and the article R are held apart from each other in a substantially horizontal state regardless of the unevenness, undulation, or inclination of the upper surface of the lower article R, and the feeding unit 5 is placed on the separate sheet S in this state by the transfer body 21.
By transferring the product R from the
, release the fixation around the periphery of the sheet, lower the separate sheet S carrying the item R onto the pallet P from the center in a loose concave shape, and repeat the above operation while lowering the pallet P with the pallet lifter 2. Separate sheet S with item R on P
The cargo is loaded in multiple stages via the .

(Embodiment) An embodiment of the pallet loading device of the present invention will be described with reference to the drawings.

In this embodiment, as shown in FIG. 1, rings R made of synthetic resin are stacked in multiple stages on a pallet P via separate sheets S (hereinafter simply referred to as sheets S). is the diameter
It is small, measuring approximately 100 to 130 mm and height 14 mm, and is particularly extremely low in height and extremely light in weight, less than 10 g.

In FIGS. 2 and 3, 1 is a pallet conveyor that conveys a pallet P from the right side in the figure to the left side in the figure, and this pallet conveyor 1 is made up of a plurality of chain conveyors, each of which can be driven independently. So, each chain conveyor has 2
The pallet lifter 2 has a conveyor chain in the form of a strip, and a pallet lifter 2 that supports the pallet P and raises and lowers it is provided in the chain conveyor in the middle of the pallet conveyor 1 so as to be able to rise and fall from below to above the conveyance surface.

A carry-in conveyor 3 and an alignment conveyor 4 are located above the left side of the pallet conveyor 1 in the conveying direction and convey the rings R in two rows from the left side in the figure to the right side in the figure opposite to the pallet conveyor 1.
are arranged in series, and the alignment conveyor 4 is connected to the carry-in conveyor 3.
an alignment mechanism for arranging the rings R conveyed by the pallet lifter in a staggered manner, and a transfer mechanism for transferring the aligned rings R to the side on the pallet lifter 2 side,
A layer section 5 is formed on the side of the alignment conveyor 4 on the pallet lifter 2 side, and serves as a supply section for arranging the rings R from the alignment conveyor 4 in multiple rows corresponding to one stage of a loading pattern.

In addition, in the layer section 5, a large number of support punches 5a are arranged in parallel at intervals from the side of the alignment conveyor 4 toward the pallet lifter 2 so that the ring R can slide smoothly. It is formed by a slatted body.

Further, four receiving plates 6, 7, 8, and 9 as receiving members are arranged horizontally and rectangularly at the upper peripheral part of the pallet lifter 2 and at the same height as the layer part 5. provided, each receiving plate 6,
7, 8, and 9 are horizontally moved inwardly and outwardly by drive mechanisms such as air cylinders 10 shown in FIGS. 4 and 6, respectively, and advance inwardly to horizontally support the peripheral portion of the sheet S. It moves between an advanced state and a retracted state in which it retreats outward and drops the sheet S.
Holding plates 11, 12, 13, and 14 as holding members are provided on the outer upper surfaces of the cylinders 8 and 9, respectively. Each receiving plate 6,
7, 8, 9 horizontally on the upper surface of the outer side and presses the periphery of the sheet S, and each receiving plate 6, 7,
The sheet S is vertically retracted from the upper surface of the receiving plates 8 and 9 and rotated to a retracted state in which the sheet S is guided to each of the receiving plates 6, 7, 8, and 9.

Of the receiving plates 6, 7, 8, and 9, the receiving plate 8 on the layer portion 5 side is shown in the same way as the other three receiving plates 6, 7, and 9 in FIG. 1 for convenience. In reality, as shown in FIG. 2, the holding plate 13 corresponding to the receiving plate 8 is formed with gaps in between as shown in FIG. The receiving plate 8 and the holding plate 13 are engaged with the gap and intersect with each other as shown in FIG. 6, and the other three receiving plates 6, Pushers 17 for the edge of the sheet S are provided on both sides of each of the seats 7 and 9, and each pusher 17 is horizontally moved inwardly and outwardly by a drive mechanism such as an air cylinder 18 shown in FIG. It moves between an advanced state in which it advances and positions the peripheral portion of the sheet S, and a retracted state in which it retracts outward.

As shown in FIG. 6, a spanning plate 19 is provided to protrude from the layer portion 5 above the receiving plate 8 in the retracted position.

Then, from above the layer part 5, the gangplank 1 is
A carriage 21 as a transfer body is provided horizontally movably at a position above each of the receiving plates 6, 7, 8, and 9 above the pallet lifter 2 via the pallet lifter 9. This carriage 21 has a pusher 24 movable up and down between the ends of the alignment conveyor 4 side of a pair of side guides 22 and 23 on both sides parallel to the direction of movement thereof, and has a substantially U-shape in plan view. ing. The pusher 24 is moved up and down by a drive mechanism (not shown), and is in an upward and retracted state in which it passes the rings R transferred from the alignment conveyor 4 to the layer section 5, and in an upwardly retracted state in which the rings R aligned on the layer section 5 are received. It is adapted to move to a downwardly advanced state in which it is pushed to a position above the plates 6, 7, 8, and 9.

Further, a sheet stacker 26 is provided above the right end of the pallet conveyor 1 in the drawing. This sheet stacker 26 (hereinafter simply referred to as stacker 26) stores a large number of stacked sheets S.
It includes a seat lifter 27 that supports and raises and lowers the
The uppermost sheet S is kept at a substantially constant height, which is slightly higher than each of the receiving plates 6, 7, 8, and 9.

Then, a sheet carrier 28 is installed from above the stacker 26 to above each of the receiving plates 6, 7, 8, and 9.
A carrier 28 (hereinafter simply referred to as a carrier 28) is provided so as to be horizontally movable, and a plurality of vacuum cups 29 (hereinafter simply referred to as a cup 29) are provided at the bottom of the carrier 28 so as to be movable up and down.
, when the stacker 26 descends and adsorbs the uppermost sheet S on the sheet lifter 27 or when releasing the sheet S on each receiving plate 6, 7, 8, and 9, the carrier 28 is in a descending state and the carrier 28 is on the stacker 26. When moving upward or above each of the above-mentioned receiving plates 6, 7, 8, and 9, it moves to a raised and retracted state.

Next, the operation will be explained.

The pallet P supplied to the right end of the pallet conveyor 1 in the figure is conveyed to the pallet lifter 2 and raised to the lower part of each receiving plate 6, 7, 8, 9, and the sheets S of the stacker 26 are lifted into each cup. 29 and each receiving plate 6, 7, 8, by the carrier 28.
9. Supply on top.

At this time, when the sheet S is separated from each cup 29, each presser plate 11, 1 is in a vertical retracted state.
2, 13, and 14 are guided to the upper surface of each receiving plate 6, 7, 8, and 9 in the advanced state, and then each pusher 17 advances inward, and each pusher 17 and layer are guided to the edge of the sheet S. Holding plate 13 on section 5 side
are in contact with each other to position the sheet S on each of the receiving plates 6, 7, 8, 9, and then each of the holding plates 11, 12, 1
3 and 14 extend horizontally to the upper surface of the outer side of each receiving plate 6, 7, 8, and 9, and the peripheral part of the sheet S extends to each holding plate 1.
1, 12, 13, 14, each receiving plate 6, 7, 8,
The sheet S is held in a horizontal or gently concave shape by being pressed by the upper surface of the outer side of the sheet S.

Further, a large number of rings R sequentially carried in two rows by the carry-in conveyor 3 are arranged in a staggered manner by the alignment conveyor 4, and then the carriage 21 located in the layer section 5 is placed under the pusher 24 in the upwardly retracted state. By sequentially moving the ring R to the layer part 5 through the ring R, the rings R are arranged in multiple rows corresponding to one stage of the loading pattern in a staggered manner between the side guides 22 and 23 of the carriage 21.

When the rings R for one stage of the loading pattern are aligned in the layer section 5, the pusher 24 of the carriage 21 is lowered to advance the rings R for one stage to the alignment conveyor 4 side, and then the carriage 21 is From the top of the layer section 5 to the top of the connecting plate 19 and the holding plate 13
The pallet lifter 2 is moved to a position above each of the receiving plates 6, 7, 8, and 9 through the upper part of the pallet lifter 2. With the ring R regulated by Unfix the peripheral part of S, and remove the ring R.
The sheet S supporting the pallet is lowered onto the pallet P from the center in a loosely concave manner.

Then, by repeating the above-mentioned operation while lowering the pallet P little by little with the pallet lifter 2, the sheets S supporting one stage of aligned rings R are sequentially lowered onto the pallet P and stacked. The rings R are stacked on the pallet P via the sheet S in predetermined stages, for example, about a hundred and several dozen stages,
After the pallet P has been loaded at the specified level, the sheet S and top frame T are placed on top, and then
The pallets are conveyed to the left edge of the pallet conveyor 1 in the figure, bound, etc., and then conveyed from there.

Then, as shown in FIG. 1, when transferring the ring R to the sheet S, the sheet S is separated from the pallet P and the lower ring R.
Because the peripheral part is held, the upper surface of the lower ring R is uneven, and the lower ring R due to multi-stage loading.
The sheet S is held horizontally or in a gently concave shape regardless of the undulations or inclinations of the upper surface, and the ring R is transferred onto this horizontal sheet S, so that the ring R is low in height and light in weight. It can be transferred stably and reliably, and even when loading, the ring R
Due to the retraction of the receiving members 6, 7, 8, and 9, the sheet S supporting the pallet P is gently recessed from the center.
It will be lowered onto the upper or lower ring R, so
The alignment of the rings R does not collapse.

(Effects of the Invention) As described above, according to the present invention, when transferring items to the separate sheet, the separate sheet is held at its periphery while being separated from the pallet and the items on the lower tier. The separate sheet is held horizontally or in a gently concave shape, regardless of the irregularities on the top surface of the items in the lower tier, or the undulations or inclinations of the top surface of the items in the lower tier due to multi-tiered loading, and the items are transferred onto this horizontal separate sheet. This allows items that are low in height and light in weight to be transferred stably and reliably, and during loading, the separate sheet that supports the items has a loose concave shape that allows the pallet to be removed from the center. Since it is lowered onto the items on the upper or lower tier, the alignment of the items will not be disrupted.

[Brief explanation of drawings]

The figures show an embodiment of the present invention; FIG. 1 is a perspective view showing a pallet loading method, FIG. 2 is a plan view of the pallet loading device, FIG. 3 is a front view thereof, and FIGS.
The figure and FIG. 6 are a side view, a plan view, and a side view of the details. P...Pallet, S...Separate sheet, R
...Ring as a product, 2...Pallet lifter, 5...Layer section as a supply section, 6,7,
8, 9... Receiving plate as a receiving member, 11, 12, 1
3, 14... Pressing plate as a holding member, 21...
A carrier as a transfer object.

Claims (1)

[Scope of Claims] 1. A loading device for loading items onto pallets in multiple stages via separate sheets, comprising: a pallet lifter that supports the pallet and moves up and down; a receiving member that is retractably provided and supports the peripheral portion of the separate sheet; and a receiving member that is provided movably on the receiving member and that presses the peripheral portion of the separate sheet onto the receiving member in the advanced state, and presses the peripheral portion of the separate sheet onto the receiving member; a presser member that holds the pallet in a substantially horizontal state away from the pallet and the articles located below; an article supply section provided outside the presser member; and a presser member that is held by the receiving member and the presser member. A pallet loading device comprising: a transfer body for transferring an article from the supply section onto the separate sheet.