JPS58113031A - Depalletizer - Google Patents

Abstract

PURPOSE:To provide a depalletizer for unloading a bulk pallet where loads are stacked in layers sequentially from the uppermost layer of loads, first, which can unload the pallet without bringing down the outermost load by always performing centering relative to the center of the load layer. CONSTITUTION:After a bulk pallet 10 is first carried in and disposed at an assigned place A, a dead plate 3 is lowered from the above to set an intermediate board 10' of the uppermost layer of loads 20 on the pallet 10 at a position B of a height for taking out loads. Under such a condition, a sweeper frame 11 is adapted to surround the loads 20 on the uppermost intermediate board 10', too. Subsequently, fluid operating devices 17, 17' of a stabilizer 12 in the frame 11, which serves for a centering device, too, are operated to move moving plates 14, 15 inwards in such a manner as to clamp the loads 20. After that, the above frame 11 is moved to the right through a chain 7 to transfer the loads onto a plate 3, and the loads 20 on the plate 3 are transferred onto a conveyer 9 after the plate 3 is lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a depalletizer, and more particularly to a depalletizer with a modified structure that stabilizes loads during unloading.

In recent years, containers such as bottles and cans used in the filling industry, sake brewing industry, soft drink industry, etc. have been replaced with plastic cases, carts/cases, etc. in order to reduce costs, automate factories, and save labor. Instead of wooden boxes, etc., a bulk pallet system has been adopted in which containers like bottles are arranged on a pallet, stacked in large numbers and packed with string, rubber band, shrink film, etc. A depalletizer is used to unpack bulk pallets and unload containers from the top layer of cargo.

Such a well-known depalletizer has a horizontal platform that can be raised and lowered, and when the uppermost intermediate board and the platform are aligned at the same position, a container as a load is transferred from the intermediate board onto the platform, and then The platform is arranged in a trough that is aligned with the take-off surface of a feeding device, such as a conveyor, for feeding the required equipment, and the load on the platform is transferred onto the take-off surface. However, in such a depalletizing system, when the bulk pallet is unpacked, the stack of cargo on the upper IK deviates from the arrangement of the bulk pallet and tilts, causing the outermost container to topple or fall. Moreover, when a load is transferred from the intermediate board to the platform, it gets caught in the gap between the intermediate board and the platform and falls over, making it difficult to transfer containers smoothly.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to eliminate such drawbacks of the prior art by providing a stabilizer consisting of nine movable plates assembled in a frame-shaped swivel frame so as to be able to move inwardly. The load on the intermediate board is always centered with the load at the center, and the load on the intermediate board is clamped from the periphery.An intermediate plate is provided that can freely protrude into the gap between the intermediate board and the dead plate, and the load is held at the nine points where the load is stuck. To provide a depalletizer which can stop the protrusion of an intermediate plate and smoothly transfer loads from the intermediate plate.

According to this invention, the debaretizer includes a dead plate forming a nine-horizontal platform that is supported so as to be able to rise and fall along a vertical grid K, a gantry forming nine horizontal arms integrated with this dead plate, and At the foot of the swirler 7 tray, which has a stabilizer consisting of nine movable grates arranged in a frame shape so as to be movable inwardly, there is a protruding middle extending along the side edge of the dead plate on the bulk pallet installation side. The uppermost load of the nine bulk pallets is installed at a desired position and can be moved smoothly by being held by the swivel frame and stabilizers from the surrounding area.

Other objects, features and advantages of the invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings.

As shown in Figs. 1 to d, the depalletizer of the present invention includes a dead plate 3 which forms a horizontal platform that is supported so as to be able to rise and fall along a mast that stands upright from a base L, and a 1 integrally formed with this dead plate J. The gantry leader is a horizontal arm, and the stabilizer 2izer/J, which also serves as a centering device, consists of nine movable plates /4I and /k, which are assembled into a frame shape that can be moved and adjusted in the left and right directions. It is mainly composed of a swirl frame 17 with a swirl frame 17. The mast 1 is made of a column member having a suitable cross-sectional shape, such as a prismatic column, and is fixed to a base 5 so as to stand upright in a direction perpendicular to the base 1. This mast-
A horizontal dead play that can freely slide up and down along the
is provided. As shown, the de-end plate J has a rectangular shape with a flat upper surface, and is integrated with a gantry leader forming a horizontal arm by means of a suitable connecting member such as an angle member μ. gun)! In J-l, the rectangular pillar trench 9 that extends in the horizontal direction is made of angle material, and is installed so that it can be moved up and down along the mastco along with the dead plate J, and is installed at the upper end of the mast. For example, it is moved up and down by a hoisting device such as a chain hoist. one end of the gantry leader,
At the left end in Figure 1, there is a swirl frame//Gantt 1.
It is installed along the guide rail 6 of 7-y so as to be movable in the horizontal direction by, for example, an endless chain. The swirler frame/l has a frame shape with nine outer frames 16 and three movable plates/plates provided inside the outer frame 16 and assembled into a frame shape so as to be movable inwardly. ,
The stabilizer l- consists of a stabilizer l- consisting of /1, and a fluid actuator such as a pneumatic piston-cylinder device. Among the stabilizers f/J, for example, the moving plate l in the post-spinning direction (relative to the moving direction of the wiper frenime)
The plate is provided with long grooves near both ends, and the other lateral moving plate /3 is provided with a rondo-like elongated portion at both ends, extending through the long groove of the moving plate /41. Yo-Gun, each movement play) / 41,
Both ends of /& are fluid operated devices.

/ 7' respectively. Accordingly, each movement of the stabilizer lλ by the operation of the fluid actuators /i, /ri1 is such that each movement of the stabilizer lλ is prevented by moving inwardly or outwardly. That is, both ends of the forward and backward movement plate (41) are connected to the ends of a rod rod j of a fluid actuated device such as a double-acting piston cylinder via a slider j4, and can be moved in the left and right lateral directions. The ends of the rod-shaped parts on both sides of the plate/j are similarly connected to another fluid-operated device. 1 through the slider base 1, and thus the fluid actuated device/'1. /
Fluid actuated device/7. by the action of fluid pressure on f'. /7
' is activated and the movement play of the stabilizer saw)/4(
, lj, the inner trenches 9 are moved outwards so as to clamp the container carrying the load on the intermediate board 10' from the periphery. At this time, the stabilizer l- is always on the intermediate board 1.
The load is held by centering the load on the center of the load layer above the dead plate 3. In the front, an intermediate plate 31 is formed by bending a plate material at a substantially right angle along the side edge of the rear end of the dead plate 3.
A fluid actuating device such as a piston cylinder device is provided so as to eliminate a link between the intermediate board io' and the intermediate board io'.
Loads such as bottles on intermediate board lo, operated by J.
20'1c so that it can be smoothly transferred onto the dead plate J. t'#-1 A detector t is provided roundly to detect the upper surface position of the load O on the intermediate mate 10', so that the intermediate plate 31 is stopped when it hits the load.

The depalletizer of the present invention constructed in this manner is operated as follows.

First, move to the designated location in Figure 1) (Rukunokulet 10)
is placed by a forklift conveyor. Next, move up to the highest position and lower the get plate 3t upwards (adjust the intermediate board 10' of the uppermost load layer of the pallet IO to position B, which is the height to be taken out).

At this time, the swirl frame l/ is also lowered from the upper position together with the dead plate 3, and the uppermost intermediate board 10
'The state surrounds the load λ0 above. Next, activate the fluid operating device /'I, /1 of the stabilizer saw that also serves as a centering device in the swir frame ll to move the moving play) /41゜lj inward, so that it is in a state where it is holding the load -〇. do.

At this time, the stabilizer saw is centered with respect to the center of the uppermost load layer and clamps the load. Therefore, the three fluid actuators of the dead plate J are activated to project the intermediate plate 3/ from the dead plate J and stop it when it hits the load, so that there is no gap between it and the intermediate board 10'. Next, actuate the drive device l of the gun (IJ-'l) to move the swirl frame/l in the right direction, that is, in the direction of arrow 3j, via the non-straight chain γ, and move the intermediate part held between the stabilizer 2 and the Move the load -〇 on board io' onto dead plate J together. If the load is completely transferred onto the dead plate J (9), operate the fluid actuator J of the intermediate plate yi to pull the intermediate plate j/ from the uppermost intermediate board to' where there is no load. Move back so that it can fit in. Therefore, the dead plate 3 is moved upwardly and downwardly, in the embodiment shown in FIG. In addition, 1. It goes without saying that the Suino (-frame ii) that clamps the load λθ also moves up and down together with the dead plate 3, and the relative position in the vertical direction between the dead plate 3 and the Suino Kuichi frame // cannot change. do not have.

Next, by moving the swirl frame l/ further to the right, the load 20 on the dead plate 3 is transferred to the top of the conveyor by the sripper frame l/, so that a container such as a bottle, which is the load ○, is placed in front of you. Conveyor! is transported to the required location.

Next, the fluid actuation device 17,/1 of the swirl frame // is actuated to open the stabilizer saw outward, and the gantry lid and dead plate J are raised together, and the swirl frame // is moved to the right position. It is then moved along the gantry lid towards the left position and returned to its initial state. During this time,
The empty top intermediate board to' is removed and the load on the next intermediate board is prepared for removal. Further, it is preferable that such movement of the swirl frame // be carried out over the shortest distance so as not to topple the load on the next stage intermediate board.

Next, the loads of the next stage are unloaded in the same manner in the above-mentioned nine order, and when the load of the lowest stage has been unloaded, it is replaced with a new bulk pallet and the necessary unloading is repeated.

As described above, according to the depalletizer of the present invention, the outermost strings, rubber pads, shrink films, etc. of the bulk pallet are removed in advance and then installed in a predetermined place, so that the bulk pallet does not tilt slightly. Regardless of the condition of the bulk pallet, the stabilizer of the swirl frame will always center the load to the center of the layer, and the tilt of the bulk pallet will prevent it from collapsing with the intermediate board of the topmost load. Even if there is a gap between the plates, the protrusion of the intermediate plate, which is an intermediate plate, is adjusted so that there is no gap, and the bulk stabilizer ensures that the load is always centered around the load. The pallet is held from all sides and moved onto the dead plate in a stable state, so there is no need to worry about the outermost load being knocked over, and the process is carried out smoothly.The bulk pallet does not shake and is moved to the dead plate in a stable state. It can be unloaded at Further, the ejection of the intermediate plate can be stopped at the point where it hits the load by using appropriate detection and control means, and other drive devices and fluid actuation devices can also be controlled by an appropriate control device. Preferably, it is activated.

It goes without saying that the present invention can also be applied to a depalletizer in which the pallet is lifted so that the topmost layer of the bulk pallet is always in a fixed position.

[Brief explanation of the drawing]

1 to 3 are a front view, a side view, and a plan view of the denomination of the present invention, and the second figure is an enlarged plan view of the siber frame. In the figure, /: base, J: mast , J:
Dead plate, bower: gantry, 9: conveyor, )O
:/<Luc pallet, lO': intermediate board, l: siber frame, Iconistabilizer, /4I, lj: moving plate, lli, /li+, 3-2 fl single body actuator,
KO: Load, 31: Intermediate plate. Patent applicant: Yamamura Glass Co., Ltd. 1C

Claims (1)

[Claims] In a depalletizer that unloads a bulk pallet consisting of multiple stacked layers of cargo in order from the top layer of cargo,
It has a stabilizer consisting of nine movable plates which are assembled into a frame shape so as to be movable inwardly from all sides, and are supported so as to be movable in the horizontal direction, and nine horizontal platforms are supported by the mast. and a protruding intermediate plate extending along the side edge of the bulk pallet installation side of the dead plate to form a dead plate, which is placed in a predetermined position to remove the uppermost load of the bulk pallet from the sweeper frame stabilizer 2.
A depalletizer characterized in that the depalletizer can be moved smoothly by being clamped from the surrounding area.