JP2981610B1 - Pallet handling equipment - Google Patents

Abstract

A pallet is moved to a predetermined position by a pallet supporting piece to position the pallet. SOLUTION: A boomerang-type pallet support piece 2 is attached to a plurality of vertical shafts 1, respectively. When the pallet support piece 2 is rotated in a horizontal direction and inserted inside a pallet P, the pallet support piece 2 is provided. When the inner surface 21 of the pallet contacts the outer wall P2 of the pallet P,
Is further rotated to move the pallet P to a predetermined position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pallet handling device, and more particularly to a pallet handling device capable of positioning a plurality of types of pallets having different dimensions at predetermined positions.

[0002]

2. Description of the Related Art Conventional techniques relating to a pallet handling apparatus are disclosed in Japanese Patent Application Laid-Open Nos.
No. 48527 is known.

The prior art described in the above publication is described in Japanese Patent Application Laid-Open No. Sho 60-148825, in which a pallet is sent from the lowermost portion of a magazine according to the pallet size, and the magazine itself is also provided according to the pallet size. An automatic pallet feeder is described. Japanese Patent Application Laid-Open No. 9-48527 describes a pallet storage / unloading device provided with a boomerang-type pallet support piece.

[0004]

However, the above-mentioned prior art has the following problems.

That is, in the automatic pallet supply device described in Japanese Patent Application Laid-Open No. 60-148825, a magazine is composed of a fixed guide and a movable guide, and the pallet is formed based on the fixed guide (two sides of the pallet). The pallet is positioned so that the pallet cannot be positioned with reference to the center position of the pallet. Further, Japanese Unexamined Patent Publication No.
The pallet storage / unloading device described in Japanese Patent No. 48527 cannot position a pallet by a pallet support piece.

Accordingly, it is an object of the present invention to provide a pallet handling apparatus which moves a pallet to a predetermined position by a pallet supporting piece and positions the pallet.

[0007]

According to the present invention, a boomerang-shaped pallet supporting piece having an inner surface formed in a stepped shape is attached to a plurality of vertical shafts, and the pallet supporting piece is turned horizontally. When the inner surface of any of the pallet support pieces and the outer surface of the end of the outer pallet of the pallet come into contact with each other when the pallet is moved and inserted inside from the insertion port of the pallet. , The pallet support piece is further rotated ,
The by Rukoto insert the pallet support piece is completed by providing a pallet handling apparatus characterized by are none so that the pallet is moved to a predetermined position corresponding to its size with respect to the transport direction The purpose has been achieved.

Further , the inner surface is formed in a step-like manner on a plurality of vertical axes.
The boomerang-shaped pallet support pieces that are formed
The pallet support piece rotates horizontally.
When moved and inserted inside from the pallet slot
The inner surface of any pallet support and the outer surface of the pallet
If the outer surface of the end of the girder contacts
The pallet support piece is further rotated, and all pallet support pieces are inserted.
Is completed, the small pallet is
The outer girder of a pallet with a small inner surface on the tip side of the support piece
Contact the outer surface of the end of the
The outer girders of a pallet with a large inner surface on the base side of the support piece
Contact the outer surface of the end of the
The center position in the transport direction of the
To the approximate center position in the transport direction
Providing a pallet handling device characterized by
The above-mentioned object has been achieved by providing.

[0009] Incidentally, a pallet conveyor, and a stopper for stopping the pallet carried by the pallet conveyor, the moving-direction center position and is substantially formed by the moving-direction center position and a plurality of pallets supporting piece of the pallet It is preferable that the stopper is provided so that the pallet is stopped at the coincident position.

[0010]

Embodiments of the present invention will be described below.

FIG. 1 is a plan view showing an embodiment of the pallet handling apparatus of the present invention, FIG. 2 is an elevation view of the pallet handling apparatus shown in FIG. 1, FIG. 3 is a side view of the pallet handling apparatus shown in FIG.
FIG. 4 is an explanatory view of the operation of the pallet support piece.

In these drawings, reference numeral 1 denotes a vertical axis, which is disposed at a position facing outward from four corners of the elevator 5 in a plan view, and a total of four vertical axes 1 are provided. Have been. Also, 2 is each vertical axis 1
The pallet supports are boomerang-type pallets mounted on the four vertical shafts 1. The inner surface 21 of the pallet support piece 2 is formed in a step shape. 3 is a pallet transport conveyor, 4 is a pallet P transported by the pallet transport conveyor 3
The stopper 4 is a stopper (not shown in FIGS. 1 to 3 and refer to FIG. 4) for stopping the pallet P in the transport direction center position PC and a plurality of (four) pallet support pieces 2.
The pallet P is arranged to stop at a position substantially coincident with the center position 2C in the transport direction formed by the pallet. Thus, when the pallet support piece 2 is rotated in the horizontal direction and inserted inside the pallet P, the pallet support piece 2
When the (part of) the inner side surface 21 contacts the outer wall P2 of the pallet P, the pallet P is further rotated to move the pallet P to a predetermined position corresponding to its size. Positioned.

To explain each part in the above embodiment, a total of four vertical shafts 1 are provided at four positions outwardly from four corners of the lifting platform 5 in plan view. The upper and lower ends of the vertical shaft 1 are supported by bearings attached to a frame, and are configured to be rotatable.

The pallet supporting piece 2 is a boomerang-shaped plate-like body, which is attached to the vertical shafts 1 so as to be sandwiched between a pair of bearings, one for each of the four vertical shafts 1. Pallet support pieces 2 are attached so as to be integrated. The inner surface 21 of the pallet support piece 2
Are formed in a step shape, and when each pallet support piece 2 is rotated in the horizontal direction and inserted inside from the insertion port of the pallet P, the inner surface 21 of any of the pallet support pieces 2 Part (small nail side 211 or large nail side 212)
Is in contact with the inner wall P1 of the pallet P, and the insertion of all the pallet support pieces 2 is completed (the air cylinder 2 described later).
When the operation of the pallet 21 is completed), the shape and size of the pallet supporting piece 2 (particularly, the shape and size of the inner surface 21) are set so that the pallet P is positioned at a predetermined position according to the size. In the embodiment shown in FIG. 4, the small pallet P, which is indicated by a dashed line, is positioned in the direction perpendicular to the conveying direction by the small claw side 211, and The shape and dimensions of the pallet supporting piece 2 are set so that the large-sized pallet P shown by the dotted line is positioned in the direction perpendicular to the transport direction. Also, the pallet P shown in FIG.
(The center girder is not shown) This is a wooden flat pallet with a plurality of deck boards attached to the top and bottom of the deck board. The pallets P are mounted so that they protrude from the side surfaces (as shown by the two-dot chain line in FIG. 1). This is a T11 type (JIS standard) pallet attached so that the side surfaces are flush with each other, and two outer girder PKs
Corresponds to the inner wall P1 of the pallet P.

When each of the pallet support pieces 2 is rotated in the horizontal direction and inserted inside from the insertion port of the pallet P, a part of the inner surface 21 of one of the pallet support pieces 2 (large With the pawl front side surface 213 or the base front side surface 214 in contact with the outer wall P2 of the pallet P, the insertion of all the pallet support pieces 2 is completed (the air cylinder 221 described later).
Is completed), the shape and size of the pallet supporting piece 2 (particularly, the shape and size of the inner surface 21) are set so that the pallet P is positioned at a predetermined position corresponding to the size. In the embodiment shown in FIG. 4, the small-sized pallet P shown by a dashed line by the large claw front side 213 is positioned with respect to the conveying direction, and is shown by a two-dot chain line by the base front side 214. The shape and dimensions of the pallet supporting piece 2 are set so that the pallet P having a large size is positioned in the transport direction. Further, the pallet P shown in FIG. 4 is such that both ends of the three girders PK and the outer surfaces of the ends of the edge board (deck board forming the insertion port) are flush with each other. The outer surfaces of the ends of the two outer girders PK are attached to the outer wall P2 of the pallet P.
Is equivalent to The shape and dimensions of the pallet support piece 2 are determined by the number of types of pallets P to be handled and their shapes,
It can be set appropriately according to the dimensions. Reference numeral 22 denotes a driving device for rotating the pallet support piece 2 in the horizontal direction, and is constituted by an air cylinder 221 or the like. The pallet support piece 2 attached to the vertical shaft 1 by expansion and contraction of the air cylinder 221. Is rotated so that the pallet supporting piece 2 is inserted into the pallet P or retracted.

The pallet transport conveyor 3 is a drive chain conveyor for transporting the pallets P from right to left in FIG.

The stopper 4 is for stopping the pallet P conveyed by the pallet conveyor 3 at a predetermined position, and is configured so that the stop member can be protruded and retracted with respect to the conveying surface of the pallet conveyor 3. The pallet P is disposed so that the pallet P can be stopped at a position where the pallet P transport direction center position PC substantially coincides with the pallet P transport direction center position 2C formed by the four pallet support pieces 2. In the embodiment illustrated in FIG.
A pair of stoppers 4 for stopping a small-sized pallet P shown by a dashed line at a predetermined position and a pair of stoppers 4 for stopping a large-sized pallet P shown at a double-dotted line at a predetermined position. And a stopper 4 provided for each dimension (size) of the pallet P. The stopper 4 is provided at the center position PC in the transport direction of the pallet P (a line indicated by a chain line in the center of FIG. 4). Minutes)
The respective pallets P are stopped so that the center position 2C (a line segment indicated by a dashed line in the center of FIG. 4) formed by the four pallet support pieces 2 substantially coincides with the center position 2C. Note that an upper stopper (not shown) for stopping the empty pallets P stacked on the upper portion of the empty pallets P stacked as described later is provided on the upper portion of the stopper 4. . The upper stopper is configured to be able to move the position of the stop member in the transport direction according to the size of the pallet P, and the transport direction center position PC of the empty pallets P stacked on the upper portion
It is arranged so that the empty pallets P stacked on the upper part can be stopped at a position where the center position 2C formed by the four pallet support pieces 2 substantially coincides with the center position 2C in the transport direction.

The elevating table 5 is a table provided with a pantograph type elevating mechanism, and is disposed inside the pallet conveyor 3 in plan view.

Next, the operation of the pallet handling apparatus of the above-described embodiment will be described with reference to an embodiment in which empty pallets P stacked in multiple layers for each type (size) are stepped. Either type of empty pallets P of the two types of empty pallets P stacked in a multilayer is transferred to the pallet conveyor 3
Empty pallets P stacked in multiple layers
Are transported by the pallet transport conveyor 3 and project above the transport surface of the pallet transport conveyor 3 (in accordance with the size of the pallet P being transported).
Of the empty pallets P stacked in multiple layers, and the pallets P stacked on the upper part are stopped by the stopper members of the upper stopper. At this time, the pallet P is stopped so that the transport direction center position PC substantially coincides with the transport direction center position 2C formed by the four pallet support pieces 2.

Empty pallets P stacked in layers are:
When the pallet P is stopped by the pair of stoppers 4 or the like so that the center position PC in the transfer direction of the pallet P and the center position 2C in the transfer direction formed by the four pallet support pieces 2 substantially coincide with each other, the pair of pallet transfer conveyors 3 is stopped. The empty pallets P stacked on the transport chain are stacked in multiple layers, and the height of the insertion port of the second empty pallet P stacked from the bottom is increased by the lifting platform 5 to the pallet support pieces 2.
Raise until it is at the installed height.

When the height of the insertion port of the second stacked pallet P from the bottom of the empty pallets P stacked in multiple layers rises to the height at which the pallet support pieces 2 are mounted, Each pallet support piece 2 is rotated in the horizontal direction, and is inserted inside from the insertion port of the pallet P. At that time, a part of the inner surface 21 of any of the pallet support pieces 2 (in the embodiment shown in FIG. 4,
The small claw side surface 211 for the small-sized pallet P shown by the one-dot chain line, the large claw side surface 212 for the large-sized pallet P shown by the two-dot chain line) and the inner wall P1 of the pallet P ( In the embodiment shown in FIG. 4, when the pallet support piece 2 comes into contact with the inner surface of the spar PK, the pallet support piece 2 is further rotated, and the insertion of all the pallet support pieces 2 is completed (the air cylinder 221). When the operation is completed), the pallet P stacked second from the bottom is moved to a predetermined position corresponding to its dimension in the direction perpendicular to the transport direction and positioned. That is, in a state where the pallet P is moved to a predetermined position corresponding to the dimension in the direction perpendicular to the transport direction and positioned, a part of the inner surface 21 of all the pallet support pieces 2 (the small claw side 21
1 or the large claw side surface 212) is substantially in contact with the inner wall P1 of the pallet P (the inner side surface of the spar PK).
When each pallet supporting piece 2 is rotated in the horizontal direction and inserted inside from the insertion port of the pallet P, the pallet supporting piece 2 is rotated and the insertion of all the pallet supporting pieces 2 is completed. Until the operation of the air cylinder 221 is completed, a part of the inner surface 21 of the pallet support piece 2 (the small claw side 2
11 or the large claw side 212) and the inner wall P1 of the pallet P
(The inner surface of the girder PK) does not come into contact with the pallet, or when the pallet supports 2 are completely inserted, the pallet supports 2 are inserted from below before the pallet supports 2 are inserted.
This means that the pallet P stacked second is at a predetermined position corresponding to its dimension in the direction perpendicular to the transport direction.

Each pallet supporting piece 2 is rotated in the horizontal direction and inserted inside from the insertion port of the pallet P, so that the pallet P stacked second from the bottom is moved in the transport direction. Even at this time, it is simultaneously moved to a predetermined position corresponding to the size and positioned. That is, when each pallet support piece 2 is rotated in the horizontal direction and inserted inside from the insertion port of the pallet P, a part of the inner side surface 21 of one of the pallet support pieces 2 (shown in FIG. 4). In some embodiments , the large claw front side 213, which is the inner surface on the tip side, for the small-sized pallet P shown by the one-dot chain line, and the large-sized pallet P shown by the two-dot chain line. Base front side 2 which is the inner side of the base
14) and the outer wall P2 of the pallet P (outer surfaces of the ends of the two outer girders PK in the embodiment shown in FIG. 4).
When the pallet support pieces 2 are rotated, the pallet support pieces 2 are further rotated, and the insertion of all the pallet support pieces 2 is completed (the operation of the air cylinder 221 is completed).
The pallet P stacked second is moved to a predetermined position corresponding to its size in the transport direction and positioned. That is, the transport direction of the pallets P of each size
The center position PC is formed by the four pallet support pieces 2.
To the center position 2C in the transport direction
When the pallet P is moved to a predetermined position corresponding to its size in the transport direction and positioned, a part of the inner surface 21 of all the pallet support pieces 2 (the large claw front side surface 21).
3 or the base front side 214) is the outer wall P2 of the pallet P
In becomes (outside of the outer surface of the end portion of the digit PK) and a state of being substantially in contact (Fig. 4, is illustrated as the small gap has occurred, the substantially contact Is in the state of being). When each pallet supporting piece 2 is rotated in the horizontal direction and inserted inside from the insertion port of the pallet P, the pallet supporting piece 2 is rotated and the insertion of all the pallet supporting pieces 2 is completed. Until the operation of the air cylinder 221 is completed, a part of the inner surface 21 of the pallet supporting piece 2 (the large claw front side surface 213 or the base front side surface 214) and the pallet P
When the insertion of the outer wall P2 (outside of the outer surface of the end portion of the digit PK) when a is not contacted or all of the pallet support piece 2 is in contact when completed, the pallet support piece 2 is inserted The pallet P stacked second from the bottom before is at a predetermined position according to its size in the transport direction.

The pallet supporting pieces 2 are inserted into the pallets P stacked second from the bottom of the empty pallets P stacked in multiple layers, and the pallets P stacked second from the bottom are moved in the conveying direction and the conveying direction. After being moved to a predetermined position corresponding to the dimension in the direction perpendicular to the direction and positioned, the upper surface of the elevating platform 5 is lowered until it is positioned below a pair of transport chains of the pallet transport conveyor 3. The lower pallet P lowers the pallet P stacked from the second bottom up from the bottom of the empty pallets P stacked in multiple layers by the lowering of the elevating platform 5, but the upper edge board of the pallet P stacked second from the bottom. When the lower surface of the pallet P is lowered to the position of the upper surface of the pallet support piece 2, the pallets P stacked from the second to the uppermost from the bottom are supported by the pallet support piece 2 and do not descend below it, but the lowermost pallet Since P is not supported by the pallet support pieces 2, it is lowered and placed on a pair of transport chains of the pallet transport conveyor 3, and is stepped. The lowermost pallet P, which has been stepped, is transported by the pallet transport conveyor 3 and sent to the next step.

When the pallet P of the lowermost layer, which has been stepped, is conveyed by the pallet conveying conveyor 3 and sent to the next step, the elevator 5 is raised, and the pallets P are stacked on the multilayer supported by the pallet support pieces 2. Empty pallet P
The pallet P, which has been stacked upward from the second from the bottom, is lifted up so that the pallet supporting piece 2 can be retracted from the inside of the pallet P, and then the pallet P is rotated by rotating the pallet supporting piece 2. Retract from inside.

When the pallet supporting piece 2 is retracted, the lifting pallet 5 is lowered by an amount corresponding to the height of the pallet P, whereby the third pallet from the bottom of the empty pallet P stacked in multiple layers is stacked. Since the height of the insertion port of P is located at the height at which the pallet support pieces 2 are attached, each pallet support piece 2 is rotated in the horizontal direction again and inserted inside from the insertion port of the pallet P. Empty pallets P stacked in multiple layers by repeating the same operation
Are moved to a predetermined position corresponding to the dimension in the transport direction and a direction perpendicular to the transport direction, and are positioned, while being stepped one by one.

The embodiment of the present invention has been described above.
The pallet handling device of the present invention is not limited to these. For example, the present invention can also be applied to a case where stacking is performed instead of stepping.

[0027]

In the case where the positioning accuracy may be low, the pallet P is moved to a predetermined position corresponding to its size in the conveying direction and positioned, and not all of the pallets P are supported. Only the inner surface 21 of the piece 2 needs to be in contact with the outer wall P2 of the pallet P.

If the pallet supporting piece 2 does not require positioning according to the size of the pallet P in a direction perpendicular to the transport direction, the pallet supporting piece 2 having no small claw side surface 211 and large claw side surface 212 is required. Can be formed.

The boomerang type of the pallet supporting piece 2 means that the pallet support piece 2 is not in the shape of a strip.

[0031]

Since the pallet handling device of the present invention is constructed as described above, the pallet can be moved to a predetermined position by the pallet supporting piece to position a plurality of types of pallets having different dimensions. Also, when applied to tiered pallets stacked in multiple layers,
Since the pallets can be positioned each time the tiers are displaced one by one, the pallets stacked in a disturbed state can also be displaced.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a pallet handling device of the present invention.

FIG. 2 is an elevation view of the pallet handling device shown in FIG.

FIG. 3 is a side view of the pallet handling device shown in FIG.

FIG. 4 is a diagram illustrating the operation of a pallet support piece.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Vertical axis 2 Pallet support piece 3 Pallet transfer conveyor 4 Stopper 21 Inner side surface 2C Center position in the transfer direction formed by a plurality of pallet support pieces P Pallet P2 Outer wall PC Center position in the transfer direction of the pallet

Claims (3)

(57) [Claims] An inner surface is formed in a plurality of vertical axes in a step-like manner.
Is boomerang-shaped pallet support piece is being mounted respectively either when the pallet support piece is inserted from the insertion port of the pallet is rotated horizontally inwardly
Outer digit inner surface and the pallet of Kano pallet support piece
When the outer surface of the end of the pallet contacts the pallet supporting piece, the pallet supporting piece is further rotated to complete the insertion of all the pallet supporting pieces.
Ryosu its said pallet with respect to the transport direction by Rukoto
A pallet handling device which is adapted to be moved to a predetermined position corresponding to the size of the pallet. 2. The method according to claim 1 , wherein the inner surface is formed stepwise on a plurality of vertical axes.
Each of the boomerang-shaped pallet support pieces
The pallet support piece is turned horizontally.
When inserted inside the pallet slot
The inner surface of the pallet support piece and the outer girder of the pallet
Contact with the outer surface of the end of the pallet.
The holding piece is further rotated, and all the pallet support pieces are completely inserted.
By completing, the small pallet will be
The edge of the outer girder of a pallet with a small inner surface on the tip side of the cantilever
Large pallet contacts the outer surface of the
The edge of the outer girder of a pallet with a large inner surface on the base side of the cantilever
Of the pallet of each size
The center position in the transport direction is
To be moved to the approximate center position in the formed transport direction
A pallet handling device characterized by being done . 3. A pallet transport conveyor, and a stopper for stopping a pallet transported by the pallet transport conveyor, wherein a central position in the transport direction of the pallet and a central position in the transport direction formed by the plurality of pallet support pieces are substantially equal. 3. The pallet handling device according to claim 1, wherein the stopper is provided so that the pallet is stopped at a coincident position.