JPS58183529A - Pallet unloader - Google Patents

Abstract

PURPOSE:To reduce weight upon an elevating frame which is the main component of an unloader for discharging loads loaded in plural layers through a separate sheet S on a pallet by independently disposing a separate sheet removing device. CONSTITUTION:A pallet P where a lot of bottles are loaded in plural layers with a sheet S interposed between layers is transported by a conveyer 1 below an opening portion 24 of an elevating frame 3 and stopped. The elevating frame 3 is lowered until a layer plate 23 as a transfer table is positioned about below the uppermost bottle. Subsequently, a sheet removing device 4 is horizontally moved above the opening portion 24, and the sheet S is adsorbed by a vacuum cup 61. After the sheet S is transported to a sheet stacker 5, the uppermost group of bottles are carried out onto the layer plate 23 through a transfer plate 37 by movement of a sweeper 33. After that, the elevating frame 3 is lowered, and the group of bottles on the plate 23 are pushed out onto a carry-out conveyer 8 by the sweeper 33 to be carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a pallet unloading device for unloading items stacked in multiple stages on a pallet via separate sheets.

[Technical background of the invention]

For example, when items that tend to tip over, such as bottles or cans, are loaded on a pallet in multiple tiers, separate sheets are interposed between the items in each tier.

And, as a person who unloads such items,
As proposed earlier, after the pallet loaded with items is carried by the carry-in conveyor below the opening of the lifting frame, it is lowered to the position relative to the item on the uppermost stage of the lifting frame, and the separate sheet above this item is removed. Then, the items on the top tier are transferred from the opening of the lifting frame onto the transfer table of the lifting frame using a sweeper, and then the lifting frame is moved to a predetermined height, connected to the unloading conveyor, and lifted and lowered. There is a pallet unloading device that unloads one level of items on a frame onto an unloading conveyor, and then repeats these operations to sequentially unload items on each tier on a pallet onto an unloading conveyor. .

[Problems with background technology]

The above-mentioned pallet unloading device does not have a lifting platform for raising and lowering a pallet that supports a large number of items, so it has the advantage of simplifying the lifting mechanism and increasing safety. Since the device is installed on the lifting frame, the load of the separate sheet removing device is added to the lifting frame, increasing the weight of the lifting frame.
Moreover, since the operation of the separate sheet removing device and the operation of the elevator frame interfere with each other, the steps of each operation have become complicated.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned points, and aims to reduce the weight burden on the lifting frame and to reduce interference between the operations of the separate sheet removing device and the operations of the lifting frame. It is.

[Summary of the invention]

The pallet unloading device of the present invention is for unloading items loaded in multiple stages on a pallet via separate sheets, and includes a carry-in conveyor for carrying in the pallet loaded with the above-mentioned items, and a carry-in conveyor for carrying in the pallet loaded with the above-mentioned items; It has an opening for the items on the pallet that is movable up and down above, and has a transfer table for the items following this opening, and moves forward and backward from the opening onto the transfer table to transfer the items to the pallet. A lifting frame equipped with a sweeper that transfers items on a pallet one stage at a time from an opening onto a transfer table, and a lifting frame that is connectable to the transfer table of this lifting frame and allows items on the transfer table to be unloaded. A separate sheet is provided between the elevating frame and the ejecting conveyor, and is interposed between each stage of items loaded on the pallet. The above objective is achieved by making it independent from the elevating frame.

[Embodiments of the invention]

Next, one embodiment of the present invention will be specifically explained based on an embodiment shown in the drawings.

Figures 1 and 2 show a pallet unloading device, and this pallet unloading device is used to load items such as the one shown in Figure 116, that is, multiple stages on a pallet [F] via separate plates (S). A large number of bottles (5
) is unloaded one stage at a time. In addition, 116
In the figure, ■ is a totsubu frame.

This pallet unloading device has a portal-shaped frame (2) in the middle of a pallet conveyor (1) that serves as an incoming conveyor.
The lifting frame (3) is installed on this frame (2) so as to straddle the frame (2).
) is provided so that it can be raised and lowered, and the separate sheet removal device (4) can be moved up and down from the - side (lower side in Figure 1) above the rear (left side in Figure 1) of this elevator frame (3). At the same time, a separate sheet stacker (5) is provided below one side of the rear part of the elevator frame (3), and
A pallet unloading conveyor (6) is provided at the front end of the pallet conveyor (1), intersecting with the pallet conveyor (1) and facing one side, and this pallet unloading conveyor (6)
A pallet stacker (7) is provided at the tip of the lift frame (3), and an unloading conveyor (8) is provided in front of the elevating frame (3), located above the pallet conveyor (1).

The pallet conveyor (l) has endless chains α2 wound around both sides of its frame a9, which are rotated by a drive device consisting of a motor, etc., and pallet conveyors (12) are mounted on both sides of the pallet conveyor (l). is supported and transported forward (to the right in the figure).

The above-mentioned frame (2) is engaged with the above-mentioned elevating frame (3) on its inner side so as to be able to rise and fall freely, and a drive device αS consisting of an air cylinder or the like is provided on the outside of the negative side of the frame (2), and this drive device (1' The elevator frame (3) is designed to move up and down for 9Kj.

The above-mentioned elevating frame (3) is shown in Fig. 4 and Fig. 5.
It is formed into a U-shape in plan view with a horizontal frame ■ connecting two substantially horizontal rear ends S (left end S in the figure) on both sides spaced apart in parallel,
A layer plate (C) serving as a transfer table is attached between the lower front portions of the side frames Qυ on both sides, and an opening 124 is provided at the rear of this layer plate (C).

Then, on both sides of the opening (24) of the lifting frame (3),
A pair of upper and lower side locks (C) and (A), which are long in the front and rear direction, are provided so that they can move inward and backward by degrees Celsius by means of air cylinders attached to the side frame QDK.
3) On both sides of the front layer plate (c), plate-shaped side guides (to) that are long in the front-rear direction are slightly attached to the upper side lock (c) in the inwardly advanced state. It is installed so that it is offset outward and downward.

Furthermore, rail rails are provided in the front and back direction inside the side frames (21) on both sides of the lifting frame (3), and the rails 21 on both sides
Both ends of the horizontally long moving frame (to) are connected to the support plate □0
υ and this support plate C11) through a plurality of rollers a2 which are pivoted on the outside, and a sweeper (to) which is long in the horizontal direction is located at the middle lower part of this moving frame (to), and is engaged with the above-mentioned upper side lock. (c) and the side guide (to).
), by moving the support plates 01) on both sides synchronously in the front and back direction along the rails using a drive device consisting of a plurality of sprockets (c) and chains (to), etc., from the opening 04). It moves forward and backward across the layer plate ej.

In addition, the layer plate (2 (to)) of the above lifting frame (3)
A transfer plate GV) is provided on the upper surface of the rear end portion so as to be movable toward the opening &4 by means of an air cylinder (to) attached to the lower surface of the layer plate (C). A laterally long front stopper 01 is attached to the lower part.

Furthermore, a rail (41) and a rack (4υ) which are long in the front and back direction are provided on the side frames (2I) on both sides via support members (not shown), which are located above the transfer plate Oη. ) and a rack (4I) with a substantially rectangular moving frame (42 is a roller (43) and a gear (4I) on both sides).
The movable frame (4) is supported so as to be able to move back and forth in the front and rear directions via a frame (4), and is moved back and forth by an air cylinder (49) attached to the upper part of the movable frame (4).

In addition, a horizontally long high lock (46) is mounted on the layer plate e3 at the rear of the movable body (40) so that it can advance and retreat from the front and upper part, and this high lock (40 is a movable frame (46)). It is moved forward and backward by an air cylinder (47) provided above.

In addition, a crossing plate (48) is pivoted to the front end of the layer plate Cj, and this crossing plate (4 hammers) is connected to an air cylinder (48) attached to the bottom surface of the layer plate (2J).
49 allows the layer plate (C) to rotate approximately 90 degrees between the front and upper portions of the front end.

In addition, a support frame (50
) is attached to the support frame 61, and a laterally long plate-shaped rear stopper 511 is provided at the front of the support frame 61 so as to be movable forward and backward. It is designed to advance and retreat inward.

Separate seat clamps (531) are provided at both ends of the rear stopper (511), and although details are omitted, separate seat clamps f531 on both sides are provided.
The pair of upper and lower gripping bodies are opened and closed at the upper part of the rear stopper all by a pair of air cylinders 541 provided at the rear thereof.

As shown in Figure 6 and the off-line diagram, the separate sheet removing device (4) has a plurality of vacuum cups 11) for suctioning the separate sheets (8) attached to a lower end of a support frame I7J that is approximately X-shaped in plan view with a spring. It is constructed by mounting K so that it can be elastically moved up and down via 0. This support frame 621 is pivotally connected to an elevating body 1351 which has a U-shape in plan view via a pair of parallel arms, and this elevating body 1 has a plurality of rollers on the inner side of both ends thereof. ) are engaged with the rails on both sides of the support column 17) installed at the rear between the opening of the elevating frame (3) and the separate sheet stacker (5), and the elevating body f
The parallel arm 141 is rotated by the air cylinder Il provided in the air cylinder 151, and the separate sheet removing device (4) is moved horizontally between the opening (2) and the separate sheet stacker (5). The lifting weight is raised and lowered by a forward/reverse motor σ1 provided at the upper part of the support mill via the subket I and the chain ff3.

The separate sheet stacker (5) is designed to support and store separate sheets (5) carried in from above in a stacked state on a pallet (2), and also to store the stored separate sheets (5) on a pallet (2). It can also be carried out from one side (downward in Figure 1).

The pallet unloading conveyor (6) carries the pallet,
Similar to the conveyor (11), endless chains σe wound around both sides of the frame (7j) are accompanied by a drive device (not shown), and the front end of the pallet conveyor (1) is mounted on the chains σe on both sides. The pallet (2) is supported and transported to a pallet stacker (7) on one side (lower side in Figure 1).

The pallet stacker (7) is located between the chains σe on both sides of the pallet unloading conveyor (6) and is mounted on a lifting platform @1.
), and a locking body is pivotally attached to the periphery of the raised position of υ of this lifting platform to allow only the upwardly moving pallet (g) to pass through, and the end of the pallet delivery conveyor (6) After lifting the pallet [F] above the locking body (8) on the lifting platform @B, the pallet (G) is stacked on the locking body @2 by lowering the lifting platform @D. In addition to being designed to be stored in
can be carried out to one side (downward in Figure 1).

The above-mentioned unloading conveyor (8) has an endless belt (product) wound between the front and back of a frame (c), which is rotated by a driving device (f) consisting of a motor etc. ) on which the bottle 03) is supported and transported forward (to the right in the figure).

Next, the overall operation will be explained.

Pallet cFj) loaded with many bottles Q3) in multiple stages
(shown in Figure 3) is carried onto the pallet conveyor (1)K, and the top frame and other packaging (not shown) are removed by appropriate means.

In this state, the pallet (G) is transferred to the pallet conveyor (1).
K is conveyed forward and stopped at the rear of the lifting frame (3) in the raised position, that is, below the opening (2).

Next, the lifting frame (3) is connected to the drive device C1 of the frame (2).
51, and stops with the layer plate (c) positioned slightly below the top bottle ω).

Next, the separate sheet removing device (4) is moved horizontally from above the separate sheet stacker (5) to above the opening (2) by the air cylinder 9, and then the motor σ(
1, the vacuum cup 6B adsorbs the upper separate sheet (5) of the uppermost stage (Masuda), and then the separate sheet removing device (4) moves the motor Cl0K
After rising further, the separate sheet stacker (5) is moved horizontally above the separate sheet stacker (5) by the air cylinder fil, and further lowered by the motor σ■, the operation of the vacuum cup @D is released, the separate sheet (6) is released, and the separate sheet stacker (6) is moved again. It is raised by the motor σO and stands by in this state.

Along with this, transfer plate CI? ) and front su.

Totsupa Yai advances toward the rear using the air cylinder (to), and the tip of the transfer plate (37) is inserted into the front lower part of the top bottle (Bl), and the front stopper (three of them are placed in the second tier). (Abutted against the front of Bl.

At the same time, the rear stopper 6]1 and the separate seat clamp groups on both sides are advanced forward by the air cylinder 52, and the rear stopper 511 is brought into contact with the rear of the second stage (width increaser). A pair of upper and lower gripping bodies of the separate sheet clamp ■ are closed by a pair of air cylinders (incorporated), and the uppermost stage (increased width) and the second stage bottle (Bl
Clamp both sides of the rear end of the separate sheet (S) between the two.

Furthermore, at the same time, the upper and lower side locks (C) and (C) on both sides advance inward due to air cylinder action and come into contact with both sides of the top and second tier bottles, respectively.

Next, the high lock (4Q) is lowered by the air cylinder supplement, and then the moving frame (42 is the air cylinder (4!19
The high lock (four frames are brought into contact with the front part of the gable of the topmost bottle) moves toward the rear.

At this time, the air cylinder (c) that advances the moving frame 02 is driven with a weak pressure so that the high lock (40) does not push the bottle (2), and the high lock 0@ is configured not to push the bottle (2). When it comes into contact with Bl, the air cylinder (4
Both the front and rear air chambers of e are opened, and the moving frame (4) can be moved freely.

Next, the sweeper (C) moves forward on the rail by the forward rotation of the motor (B), and the topmost bottle (BJ only) is kept in alignment by the upper side lock (C) and side guide (To). It is carried out onto the layer plate (c) via the transfer plate 07) without collapsing it.

In addition, at this time, High Rock (goods) and moving frame (4'lJ
is pushed forward by the bottle ■, but it provides a moderate resistance to the forward movement of the rack 0υ and the gear (increased weight due to the engagement of 441, etc.), and the bottle ω] is pushed by the separate rate (
5) To prevent the bottle from falling when moving from above to the transfer plate C3n, when the bottles (5) in the front rows move onto the transfer plate C3n, the high lock (G) is raised by the air cylinder Oη. , then move on to plate 0? ) of the bottles moved to ), but the subsequent Masuda)
It is designed to provide appropriate resistance to the bottle (B) and prevent the subsequent bottle (B) from falling over.

Then, when the bottles for one stage are carried out onto the layer plate (c), the sweeper (c) stops.

Next, transfer plate 67) and front stopper 0I
moves back forward from the air cylinder (to) K, and after the upper and lower clamping bodies of the separate seat clamp 0 are opened by the return operation of the air cylinder (Incorporated), the rear stopper ei
11 and separate seat clamp s are air cylinder 5
3, it retreats rearward, and the side lock (■) also retreats outward by the air cylinder @.

At the same time, the moving frame (43) provided with the high lock (A) is moved back forward by the air cylinder (C).

Next, the lifting frame (3) is moved to a predetermined unloading position, that is, the layer plate Q□□ by the drive device α of the frame (2).
After descending to a position where □ and the conveying surface of the unloading conveyor (8) are approximately on the same plane, the transition plate (4 barrels) at the front end of the layer plate (to) is rotated forward by air cylinder 4 and the layer plate (c) and the unloading conveyor (8).

Next, the sweeper (C) moves forward again by the forward rotation of the motor 0, and one stage of bottles () is carried out to the carry-out conveyor (8); Ru.

Next, the lifting frame (3) is connected to the drive device (I) of the frame (2).
It rises from SK and stops with the layer plate (c) positioned above the bottle (5) on the second stage, that is, the current top stage.

Then, after the sweeper (to) is retreated from the reverse rotation drive section of the motor, the transition plate (to) is rotated upward by the air cylinder 4.

Then, the elevating frame (3) is the drive device a9 of the frame (2).
The layer plate (C) is lowered until it is located slightly below the previous second stage (the current top stage Masuda), and the operation after removing the separate sheet (5) is performed again to create the second stage. (increased weight) is unloaded from the pallet (g).

By repeating these actions,
The bottles (8) above the transport surface of the unloading conveyor (8) are unloaded one stage at a time.

In addition, when unloading bottles (8) below the conveyance surface of the unloading conveyor (8) (at the lowest level on the pallet (G) or several levels above it), the separate sheet removing device (4) removes the separate sheets. After removing (5), sweeper (ha)
moves forward and the layer plate (c) is carried out, and the transfer plate Gη, the front stopper <31. After the rear stopper 511, separate sheet clamp Q, and side lock device (a) have retreated, the elevating frame (3) is at the predetermined unloading position, that is, when the layer plate (c) and the conveying surface of the unloading conveyor (8) are approximately the same. In this state, the transition plate (48) rotates forward so that the bottle (8) is carried out from the sweeper K to the carry-out conveyor (8). It has become.

When all of the bottles on pallet (G) are unloaded, the last separate sheet on pallet G (the mother case separate sheet removing device (4) carries it to the separate sheet stacker (5), and then empty palette [F
] is conveyed to the front end of the pallet conveyor (1), and then the pallet (g) is conveyed to the pallet stacker (7) from the pallet carry-out conveyor (6)K and stored in the pallet stacker (7).

In addition, in this example, a separate sheet removing device (4
) to remove the separate sheet (5) using the lifting frame (3).
), but the method is not limited to this, and may be performed using the layer plate (c) of the lift frame (3).
When the bottle) moves from the opening (2) to the layer plate (to) and when the lifting frame (3) descends or ascends to the unloading conveyor (8), the bottle falls over and the I/C becomes Furthermore, if the separate sheet (6) is removed by the carry-out conveyor (8), the bottle 031 is less likely to fall over, and the lifting stroke of the separate sheet removing device (4) can be extremely reduced. .

[Effects of the Invention] As mentioned above, according to the present invention, in a pallet unloading device for unloading products that are prone to tip over, such as bottles or cans, from a pallet, a separate sheet removing device is provided independently, so that lifting and lowering is possible. Separate sheets that reduce the weight of the frame.

The operation of the removing device and the operation of the lifting frame are less likely to interfere with each other, and unloading can be carried out smoothly.

[Brief explanation of the drawing]

The figures show one embodiment of the pallet unloading device of the present invention. Figure 1 is a general plan view, Figure 2 is a side view,
The figure is a perspective view showing the loading condition of the items to be unloaded.
The figure is a plan view of the elevating frame, Figure 5 is its vertical cross-sectional view, and 16
The figure is a plan view of the separate sheet removing device, and Figure 7 is a side view thereof. (1) Pallet conveyor as an incoming conveyor, (
3)... Elevating frame, (4)... Separate sheet removal device, (8)... Carrying out conveyor, (c)... Layer plate as transfer table, C24+... Opening, (33)...
Sweeper, double Φ, pallet, (S)...separate sheet, ■]...bottle as an item. Invented on April 19, 1980 Inventor: Yoshi 1) Yudo Yasu
Yutaka Saeki Patent applicant Okura Yusoki Co., Ltd.

Claims (1)

[Claims] (1) In a device that unloads items stacked in multiple stages on a pallet via separate sheets, there is a carry-in conveyor that brings in the pallet loaded with the above-mentioned items, and a device that can be raised and lowered above the carry-in conveyor. It has an opening for the goods on the pallet, and has a transfer table for the goods following this opening, and moves forward and backward from the opening onto the transfer table to transfer the goods on the pallet. An elevating frame equipped with a sweeper that transfers items one step at a time from an opening onto a transfer table, and an unloading conveyor that is connectable to the transfer table of this elevating frame and from which items on the transfer table are unloaded. and a separate sheet provided independently near the lifting frame and the carry-out conveyor and interposed between the items of each tier loaded on the pallet is removed between the opening and the carry-out conveyor. A pallet unloading device characterized by comprising a separate sheet removing device.