JP2006232434A - Pallet exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pallet exchanger not requiring that a pallet to be exchanged by a forklift is collected and the pallet is positioned at a predetermined position at exchange of the pallet. <P>SOLUTION: In the pallet exchanger, the pallet piled up with baggages is placed on a first table 20 positioned at a working part P1. The first table 20 is moved from the working part P1 to a pallet recovery part P2 and a baggage support plate 30 is followed to this. The pallet is removed out by abutting the baggage on a first stopper 5. The baggage is transferred from the first table 20 onto the baggage support plate 30. The pallet is fed onto a second table 40 by a pallet feeding mechanism 8. The second table 40 is moved below the support plate 30 positioned at the working part P1. When the baggage support plate 30 is returned/acted from the working part P1 to a pallet feeding part P3, the baggage is transferred from the baggage support plate 30 onto the pallet on the second table 40 by abutting it on a stopper 6. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a pallet exchanging device used in a factory, a warehouse, or the like for extracting a loaded pallet from the load and exchanging it with another pallet.

  In factories and warehouses, pallets are widely used to transport and store loads. The loaded pallet is carried by a forklift and loaded on a truck or container or stored in a warehouse. Pallets are held by each supplier, and when a load is handed over from a manufacturer to a wholesaler, or delivered from a wholesaler to a retailer, the handed side re-loads the load to its own pallet and pallets from other companies. To return. In addition, there are various types of materials and forms such as wooden and synthetic resin pallets. For example, when storing food, the wooden pallet should be transferred from a wooden pallet to a synthetic resin pallet for hygienic reasons. There is also.

  Conventionally, the above-described pallet replacement has been performed manually, but this type of work requires a great deal of labor and time and is inefficient. Therefore, the applicant has recently proposed a pallet extraction device that can mechanically perform operations such as extracting a pallet on which a load is loaded from the load or exchanging it with another pallet (for example, see Patent Document 1).

Japanese Patent No. 3582834

  As shown in FIGS. 6 (1) to 6 (3), this pallet sampling device can place a pallet A loaded (hereinafter referred to as “loading pallet L”). A table moving mechanism 101 that reciprocates a possible table 100 between a working unit P1 where a pallet replacement operation is performed and a pallet collecting unit P2 that collects the pallet A, and between the working unit P1 and the pallet collecting unit P2. When the table 100 is moved from the working unit P1 to the pallet collecting unit P2, the load C is abutted and only the loaded C is left in the working unit P1, and the working unit P1 is left behind. The load supporting plate 103 that receives and supports the load C from below is moved from the standby unit Q to the working unit P1 following the movement of the table 100, and then waits from the working unit P1. A support mechanism 104 for returning to Q, and installed between the working part P1 and the standby part Q, when the load support plate 103 returns from the working part P1 to the standby part Q, the load C hits and loads the load C. And a second stopper 105 that is left behind in the working part P1.

  In order to replace the pallet A with the above-described pallet extraction device, first, the loading pallet L is placed on the table 100 positioned in the working part P1 (FIG. 6 (1)). Next, the table 100 is moved from the working unit P1 to the pallet collection unit P2. During the movement of the table 100, the load C hits the first stopper 102 and is left behind in the working unit P1, but the load supporting plate 103 follows the movement of the table 100 and moves from the standby unit Q to the working unit P1. Therefore, the load C left behind is supported from below by the load support plate 103 (FIG. 6B).

  Next, the load supporting plate 103 is returned from the working portion P1 to the standby portion Q. During this returning operation, the load C hits the second stopper 105 and is left behind in the working portion P1. The cargo C to be left behind is supported on another pallet B supported by the fork 107 of the forklift, thereby completing the exchange of the pallet (FIG. 6 (3)). The pallet A extracted from the loading pallet L is recovered and held by the pallet recovery mechanism 106 as shown in FIG.

  However, in the pallet sampling apparatus having the above-described configuration, each time the pallet is replaced, it is necessary to take the pallet B to be replaced to its storage location, and therefore it is necessary to repeatedly reciprocate the forklift with the pallet storage location. . Further, the pallet B needs to be held in a horizontal position by a fork of a forklift and positioned at a predetermined position of the working unit P1, and this kind of work requires skill. If the pallet B is not in the proper position, the transfer of the load C from the load support plate 103 to the pallet B does not work well, causing collapse of the load.

  The present invention has been made paying attention to the above-described problem, and is a position determined by picking up a pallet to be replaced by a reciprocating operation of the forklift or by maintaining the pallet in a horizontal posture by the forklift during the pallet replacement operation. It is an object of the present invention to provide a pallet exchanging device that does not require localization.

  The pallet exchanging apparatus according to the present invention is for extracting a pallet loaded with a load and exchanging it with another pallet. A pallet supply mechanism for sequentially supplying other pallets to be replaced, and the extracted pallet sequentially. A first pallet collecting mechanism for collecting and a first table on which a loaded pallet is placed are reciprocated between a working unit where pallet replacement is performed and a pallet collecting unit where pallet is collected. After the table moving mechanism 1 and the load supporting plate capable of supporting the load are moved from the pallet supply unit where the pallet is supplied to the working unit following the movement of the first table to the pallet collecting unit. A load receiving mechanism for returning from the working unit to the pallet supplying unit, and a pallet supplied from the pallet supplying mechanism when the load supporting plate is positioned in the working unit. The second table is moved between the working unit and the pallet collecting unit, and the second table is moved from the pallet supply unit to the lower side of the load supporting plate of the working unit. A first stopper that moves the load from the first table onto the load support plate when moving to the pallet collection unit and the load support plate installed between the working unit and the pallet supply unit. A second stopper is provided for causing the load to collide when the return operation is performed from the working unit to the pallet supply unit and to transfer the load from the load support plate onto the pallet on the second table.

In order to replace a pallet with the pallet exchanging apparatus having the above-described configuration, first, a loading pallet is placed on the first table located in the working unit. Next, the first table is moved from the working unit to the pallet collection unit. During this movement, the load hits the first stopper and is left behind in the work section. However, the load support plate follows the movement of the first table and moves from the pallet supply section to the work section. The loaded load is transferred from the first table onto the load support plate. On the other hand, the pallet extracted from the load is transported to the pallet collection unit by the first table and collected by the pallet collection mechanism.
Next, a pallet is supplied by the pallet supply mechanism onto the second table in the pallet supply unit. The second table supports the supplied pallet and moves downward from the pallet supply unit to the load support plate located in the working unit.
Next, the load support plate returns from the working unit to the pallet supply unit. At the time of this returning operation, the load hits the second stopper and is left behind in the working portion. However, since the second table is positioned below the load, the left-off load is placed on the load support plate from the second stop. Transfer onto the pallet on the table. Loads loaded on new pallets are carried out by a forklift or the like.

According to a preferred embodiment of the present invention, the pallet supply mechanism is held by the pallet holding mechanism capable of holding a plurality of pallets in a stacked state at a position above the pallet supply unit, and the pallet holding mechanism. And a lifter that lowers only the lowest pallet of the pallets and places it on the second table.
According to this embodiment, since the plurality of pallets to be replaced are held in a vertically stacked state at the upper position of the pallet supply unit, the upper space of the pallet supply unit can be used effectively.

Further, according to a preferred embodiment of the present invention, the pallet collection mechanism includes a pallet holding mechanism capable of holding a plurality of pallets in a stacked state at a position above the pallet collection unit, and a first table top. The pallet is lifted and held by a pallet holding mechanism.
According to this embodiment, since the plurality of extracted pallets are held in the upper and lower layers at the upper position of the pallet collecting unit, the upper space of the pallet collecting unit can be used effectively.

In a preferred embodiment of the present invention, the load support plate has a downward facing wall that is freely reciprocated on the guide rail, and when the second table is moved below the load support plate, The interval between the opposing walls is set so that the pallet on the second table enters between the opposing walls.
According to this embodiment, unlike the conventional example, the load supporting plate is not moved in a cantilevered state. Therefore, in order to carry the loaded pallet after the pallet replacement without using the forklift, the conveyor is moved to the working unit. Can be connected, and automation of the pallet replacement work can be realized.

  According to this invention, since the pallet to be replaced is supplied by the pallet supply mechanism, it is not necessary to reciprocate the forklift to go to the storage location for the pallet to be replaced, and the workability is greatly improved. In addition, during pallet replacement work, it is not necessary to position the pallet at a predetermined position by maintaining the pallet in a horizontal posture by a forklift, so that skill is not required for positioning the pallet, and load collapse due to poor positioning can be prevented.

1 to 3 show the configuration of a pallet exchanging apparatus according to an embodiment of the present invention. FIG. 1 shows the appearance of the pallet changer when viewed from the side, FIG. 2 shows the appearance when viewed from above, and FIG. 3 shows the appearance when viewed from the side of the pallet collection unit P2 described later. Are shown respectively. 1 to 3 do not show a state waiting for the introduction of the loading pallet. For convenience of explanation, first and second tables 20 and 40 and a load support plate 30 described later are separately provided. The state located at the position is shown.
The pallet exchanging apparatus in the illustrated example is installed in a warehouse or a distribution center, for example, and is used for extracting a pallet of another company from a loading pallet and exchanging it with its own pallet. The pallet extracted and collected is returned to its owner.

The pallet exchanging apparatus according to the present invention can be applied not only to exchanging pallets of other companies with in-house pallets but also to exchanging pallets such as exchanging different types of pallets and exchanging old and new pallets.
In addition, the “pallet” here refers to a plate-like material widely used for carrying and carrying a load, and its shape and material are not limited. In this embodiment, a pallet that is widely used, that is, a pallet having a space in which a fork of a forklift can be inserted between an upper plate and a lower plate that are vertically opposed to each other is used.

The pallet exchanging apparatus in the illustrated example includes a first table moving mechanism 2, a load receiving mechanism 3, a second table moving mechanism 4, a first stopper 5, and a second stopper 6 on a machine base 1 including a plurality of frames. The pallet collection mechanism 7 and the pallet supply mechanism 8 are incorporated.
The central part of the machine base 1 is a working part P1 where loading and unloading of loading pallets and exchanging of pallets are performed by a forklift. The working part P1 should be replaced with one side (left side in FIG. 1). A pallet supply part P3 to which the company's pallet B is supplied is provided on the other side (right side in FIG. 1), and a pallet collection part P2 for collecting the extracted pallet A of another company is provided.

  The first table moving mechanism 2 has a first table 20 on which a loading pallet carried by a forklift is placed. The first table 20 is positioned in the working unit P1 in the standby state, and reciprocates along the left and right guide rails 11 and 11 between the working unit P1 and the pallet collecting unit P2 during the pallet replacement operation. The first table 20 is formed by forming a frame into a rectangular shape, and a lifter 21 constituting a pallet collection mechanism 7 described later is incorporated in a space portion in the frame. The guide rails 11 and 11 are provided over the entire length of the machine base 1 and also serve as guide rails for reciprocating a second table 40 described later.

  The lifter 21 raises and lowers a horizontal elevating plate 22 by a pantograph type elevating mechanism 24 (shown in FIG. 5-2 (5) described later). The first table 20 is mounted with a drive source (not shown) of the lifting mechanism 24, and the drive source is operated to move the lifting plate 22 up and down while maintaining a horizontal posture. The elevating plate 22 projects upward from the first table 20 when ascending, and is positioned below the upper surface of the first table 20 when descending.

  Rollers 23 that roll on the respective guide rails 11 are provided at the four corner positions of the lower portion of the first table 20. The first table 20 is linked to the drive mechanism 25 and reciprocates along the guide rail 11. The drive mechanism 25 includes a motor 26 as a drive source, left and right drive sprockets 27 driven by the motor 26, and two chains 29 respectively stretched between the drive sprockets 27 and the left and right driven sprockets 28. , 29 and the like. Each chain 29 is stretched along the left and right guide rails 11, 11, and both ends of each chain 29 are connected to the front and rear surfaces of the first table 20, respectively. When the first table 20 is moved by the drive mechanism 25 from the working unit P1 to the pallet collecting unit P2, the pallet is extracted from the load.

  When extracting the pallet, when the first table 20 is moved from the working part P1 to the pallet collecting part P2, the first stopper 5 is provided so that the load on the pallet hits and is left behind in the working part P1. ing. The first stopper 5 is installed between the working unit P1 and the pallet collection unit P2 and at the height position of the load on the machine base 1. Although the load hits the first stopper 5, the pallet passes below the first stopper 5 and moves from the working unit P <b> 1 to the pallet collecting unit P <b> 2 together with the first table 20.

  Although not shown, the first table 20 is preferably provided with pallet holding means for moving the pallet together with the first table 20 when the pallet is extracted. As the pallet holding means, for example, a claw-like object that is caught in a proper position on the pallet is provided on the first table 20, and the surface of the first table 20 is roughened to increase the friction with the pallet. The thing of various aspects, such as a thing, can be considered.

  The load receiving mechanism 3 has a load support plate 30 for receiving and supporting a load left behind in the working part P1 from below. The load support plate 30 is positioned at the pallet supply unit P3 in the standby state, and reciprocates between the pallet supply unit P3 and the work unit P1 during the pallet replacement operation. The load supporting plate 30 in the illustrated example includes opposing walls 31 and 31 formed by bending both side edges of a thin plate material downward. Each opposing wall 31 is arranged so that a pallet supported on the second table 40 enters between the opposing walls 31 and 31 when a second table 40 described later is moved below the load support plate 30. An interval is set.

Rollers 32 that roll on the left and right guide rails 12 and 12 are provided at the front and rear positions of the facing walls 31 and 31, respectively. The guide rails 12 and 12 are located above the guide rails 11 and 11 for moving the first and second tables 20 and 40.
The load support plate 30 is connected to a drive mechanism 33 and reciprocates along the guide rail 12. The drive mechanism 33 includes a motor 34 as a drive source, left and right drive sprockets 35 driven by the motor 34, and two chains 37 respectively stretched between the drive sprockets 35 and the left and right driven sprockets 36. Etc. Each chain 37 is stretched along the left and right guide rails 12, 12, and both ends of each chain 37 are connected to the front and rear surfaces of the load support plate 30, respectively.

  When the load support plate 30 is moved from the pallet supply unit P3 to the working unit P1 by the drive mechanism 33, the load support plate 3 and the motor 26 of the first table moving mechanism 2 are operated in synchronization with each other. 30 is made to follow the first table 20. At this time, the pallet is extracted, and the load is transferred from the pallet onto the load support plate 30 and supported. Further, when returning the load support plate 30 from the working unit P1 to the pallet supply unit P3, the load support plate 30 is driven by reversing the rotation direction of the motor 34 of the load receiving mechanism 3, and at this time, the load support plate 30 is removed from the load.

  The second stopper 6 is provided so that when the load support plate 30 is returned from the working unit P1 to the pallet supply unit P3, the load on the load support plate 30 abuts and is left behind in the work unit P1. The second stopper 6 is installed at the height position of the load on the machine base 1 between the working unit P1 and the pallet supply unit P3. The load hits the second stopper 6, but the load support plate 30 passes below the second stopper 6.

  The second table moving mechanism 4 has a second table 40 on which the pallet B supplied from the pallet supply mechanism 8 is placed. The second table 40 is located in the pallet supply unit P3 in the standby state, and reciprocates along the left and right guide rails 11 and 11 between the pallet supply unit P3 and the work unit P1 during the pallet replacement operation. The second table 40 is formed by forming a frame into a rectangular shape, and a lifter 41 constituting the pallet supply mechanism 8 is incorporated in a space portion in the frame.

  The lifter 41 raises and lowers a horizontal elevating plate 42 by a pantograph type elevating mechanism 44 (shown in FIG. 5-2 (4) described later). The second table 40 is mounted with a drive source (not shown) of the lifting mechanism 44, and this drive source is operated to move the lifting plate 42 up and down while maintaining a horizontal posture. The elevating plate 42 protrudes above the second table 40 when ascending, and is positioned below the upper surface of the second table 40 when descending.

Rollers 43 that roll on the respective guide rails 11 are provided at the four corner positions at the bottom of the second table 40. The second table 40 is connected to the drive mechanism 45 and reciprocates along the guide rail 11. The drive mechanism 45 includes a motor 46 as a drive source, left and right drive sprockets 47 driven by the motor 46, and two chains 49 provided between each drive sprocket 47 and the left and right driven sprockets 48, respectively. , 49 and the like. Each chain 49 is stretched along the left and right guide rails 11, 11, and both ends of each chain 49 are connected to the front and rear portions of the second table 40, respectively.
After driving the drive mechanism 45 in a state where the pallet is supported on the upper surface of the second table 40 and moving the second table 40 from the pallet supply unit P3 to the working unit P1, the load support plate 30 is moved downward. The load on the load support plate 30 is transferred onto the pallet B on the second table 40 by the return operation of the load support plate 30 from the working unit P1 to the pallet supply unit P3.

The pallet collection mechanism 7 collects and holds the pallet A carried by the first table 20 from the working unit P1 to the pallet collection unit P2.
The pallet collection mechanism 7 of this embodiment has four holding claws 71 capable of holding a plurality of pallets A stacked in the upper and lower positions above the pallet collection portion P2, and a direction in which the holding claws 71 are closed. And a pallet holding mechanism 70 including a spring (not shown) for urging the spring. The pallet collection mechanism 7 is configured by the pallet holding mechanism 70 and the lifter 21 that supports the pallet A on the first table 20 on the lifting plate 22 and raises it to the height of the pallet holding mechanism 70. Each holding claw 71 is pushed and opened by the pushed-up pallet A and then closed by a spring force, whereby the holding claw 71 is engaged with the lower surface of the pallet A to hold the pallet A.

The pallet supply mechanism 8 is for supplying the pallet B onto the second table 40, and is capable of holding a plurality of pallets B in a stacked state at a position above the pallet supply part P3. The pallet holding mechanism 80 includes a holding claw 81 and a drive mechanism (not shown) that opens and closes each holding claw 81. The pallet supply mechanism 8 is configured by the pallet holding mechanism 80 and the lifter-21 that is lowered and mounted on the second table 40 while only the lowermost pallet B1 is supported on the lifting plate 22. .
In addition, although the said lifters 21 and 41 of this Example are installed in each of the 1st, 2nd tables 20 and 40, it is also possible to install in the machine base 1. FIG.

4 (1) to (6) show the configuration and operation of the pallet supply mechanism 8 described above.
In order to supply the pallet to be exchanged onto the second table 4, first, the lifting plate 42 of the lifter 41 is pushed up to the height of the pallet holding mechanism 80 to support the stacked body of the pallet B (FIG. 4 (1)). )). At this time, the holding claw 81 holds the upper plate of the lowermost pallet B1. Next, the elevating plate 42 is slightly raised and the holding pawl 81 is set in a rotatable state by supporting the laminated body of the pallet B on the elevating plate 42 (FIG. 4 (2)).
Next, after the holding claw 81 is opened (FIG. 4 (3)), the lift plate 42 is slightly lowered (FIG. 4 (4)). When the holding claw 81 is closed in this state, the holding claw 81 can hold the second pallet B2 from the bottom (FIG. 4 (5)). Next, when the elevating plate 42 is lowered, only the lowermost pallet B1 is supported on the elevating plate 42, and the stack of the remaining pallets B is held by the holding claws 81 (FIG. 4 (6)). The pallet B1 is placed on the second table 40.

A procedure for extracting a pallet of another company from the loading pallet using the pallet exchanging apparatus having the above-described configuration and exchanging it with the company's own pallet will be described with reference to FIGS.
First, the first table 20 of the first table moving mechanism 2 is in the working unit P1, the load support plate 30 of the load receiving mechanism 3 and the second table 40 of the second table moving mechanism 4 are in the pallet supplying unit P3. Each is kept waiting (FIG. 5-1 (1)). At this time, a plurality of pallets B are held in a stacked state by the pallet holding mechanism 80 of the pallet supply mechanism 8 in the pallet supply part P3. In this standby state, the forklift supports the loading pallet L and places it on the first table 20 (FIG. 5-1 (2)).

Next, the driving mechanism 25 of the first table moving mechanism 2 is driven to move the first table 20 from the working unit P1 toward the pallet collecting unit P2, and the driving mechanism 33 of the load receiving mechanism 3 is driven. The load support plate 30 is made to follow the first table 20 and is moved from the pallet supply unit P3 toward the working unit P1. During this movement, the load C on the first table 20 hits the first stopper 5 and is left behind, and the pallet A moves together with the first table 20 to the pallet collection part P2 (FIG. 5-1 3)). Since the load support plate 30 follows the movement of the first table 20, the load C left behind is transferred from the pallet A onto the load support plate 30 and supported from below.
When the first table 20 reaches the pallet collection part P2 and the load support plate 30 reaches the work part P1, a position sensor (not shown) detects this, and each drive mechanism 25, 33 stops driving, The table 20 and the load support plate 30 stop moving (FIG. 5-2 (4)).

Next, in the pallet collection part P2, the lifter 21 of the pallet collection mechanism 7 incorporated in the first table 20 moves upward, supports the pallet A on the lifting plate 22, lifts it from the first table 20, It is pushed up to the height of the pallet holding mechanism 70 (FIG. 5-2 (5)). In the figure, reference numeral 24 denotes a lifting mechanism for the lifter 21. When the pallet A is raised, the holding claws 71 in the pallet holding mechanism 70 are pushed open and closed after passing through the pallet A. If another pallet A is held by the holding claw 71, the pallet A and the pallet A pushed up by the lifter 21 are stacked vertically.
Next, when the elevating plate 22 of the lifter 21 is lowered, only the elevating plate 22 passes through the pallet holding mechanism 70, and the pallet A is held with the holding claws 71 engaged with the lower surface thereof. Thereafter, the elevating plate 22 descends to the position of the first table 20 (FIG. 5-2 (6)).

  On the other hand, in the pallet supply part P3, the lifter 41 of the pallet supply mechanism 8 incorporated in the second table 40 operates to raise the elevating plate 42 to the height of the pallet holding mechanism 80 (FIG. 5-2 (4)). ). In the figure, reference numeral 44 denotes a lifting mechanism for the lifter 41. Thereafter, by sequentially performing the operations of FIGS. 4 (1) to 4 (6), only the lowermost pallet B1 is supported on the lifting plate 42, and the remaining pallet B is held by the holding claws 81 (FIG. 5-2 (5)). Thereafter, the elevating plate 42 is lowered to the position of the second table 40, whereby the pallet B1 is placed on the second table 40 (FIG. 5-2 (6)).

  Next, the driving mechanism 45 of the second table moving mechanism 4 is driven to move the second table 40 from the pallet supply unit P3 toward the working unit P1, and the load supporting plate 30 that is localized at the working unit P1. (Fig. 5-3 (7)).

  Next, the drive mechanism 33 of the load receiving mechanism 3 is driven, and the load support plate 30 returns from the working unit P1 toward the pallet supply unit P3. During this returning operation, the load C on the load support plate 30 abuts against the second stopper 6 and is left behind in the working part P1, but the second table 40 and the pallet B1 are located below the load support plate 30. Therefore, the load C left behind is transferred from the load support plate 30 onto the pallet B1 and supported (FIG. 5-3 (8)). When the load support plate 30 reaches the pallet supply part P3, a position sensor (not shown) detects this, the drive mechanism 33 stops driving, and the load support plate 30 stops the return operation (FIG. 5-3 (9 )). This completes the work of exchanging the pallet A of another company in the loading pallet L with its own pallet B1.

  Next, the fork 9 of the forklift is inserted into the space of the pallet B1 (FIG. 5-4 (10)), and the loading pallet L is lifted and carried out by the forklift (FIG. 5-4 (11)). Thereafter, the driving mechanisms 25 and 45 of the first and second table moving mechanisms 2 and 4 are driven, so that the first table 20 is moved from the pallet collecting unit P2 to the working unit P1, and the second table 40 is moved to the working unit P1. To the pallet supply unit P3. When the tables 20 and 40 reach the working unit P1 and the pallet supply unit P3, respectively, position sensors (not shown) detect this, and the driving mechanisms 25 and 45 stop driving, and the first and second tables. 20 and 40 stop moving (FIG. 5-4 (12)). In this state, it waits for the next pallet replacement work.

It is a side view of the pallet exchanging device which is one example of this invention. It is a top view of a pallet exchanging device. It is the front view which looked at the pallet changer from the pallet collection part. It is sectional drawing which shows the structure and operation | movement of a pallet supply mechanism. It is a side view which shows the procedure of pallet exchange work. It is a side view which shows the continuation of the procedure of the pallet exchange work of FIGS. It is a side view which shows the continuation of the procedure of the pallet exchange work of FIG. It is a side view which shows the continuation of the procedure of the pallet replacement | exchange operation | work of FIGS. 5-3. It is a side view which shows the procedure of the pallet replacement | exchange operation | work using the conventional pallet extraction apparatus.

Explanation of symbols

2 first table moving mechanism 3 load receiving mechanism 4 second table moving mechanism 5 first stopper 6 second stopper 7 pallet collection mechanism 8 pallet supply mechanism 20 first table 21 lifter 30 load support plate 31 facing wall 40 Second table 41 Lifter 70, 80 Pallet holding mechanism P1 Working part P2 Pallet collection part P3 Pallet supply part A Other company's pallets B, B1, B2 Own pallet C Loading

Claims (4)

  In a pallet exchanging apparatus that extracts a loaded pallet from the load and replaces it with another pallet, a pallet supply mechanism that sequentially supplies other pallets to be replaced, a pallet recovery mechanism that sequentially collects the extracted pallets, A first table moving mechanism for reciprocating a first table on which a loaded pallet is placed between a working unit where pallet replacement is performed and a pallet collecting unit where pallet is collected; After the load supporting plate capable of supporting the load is moved from the pallet supply unit where the pallet is supplied to the working unit following the movement of the first table to the pallet collecting unit, the pallet supplying unit is moved from the working unit to the pallet collecting unit. And a second table on which the pallet supplied from the pallet supply mechanism is placed when the load support plate is positioned in the working unit. When the first table is moved between the working unit and the pallet collection unit and moved from the pallet supply unit to the pallet collection unit between the working unit and the pallet collection unit. Installed between the working unit and the pallet supply unit, and the load support plate is installed from the working unit to the pallet supply unit. A pallet exchanging device comprising: a second stopper for causing the load to collide upon transfer operation and transfer the load from the load support plate onto the pallet on the second table.   The pallet supply mechanism includes a pallet holding mechanism capable of holding a plurality of pallets stacked in a vertical position above the pallet supply unit, and only the lowest pallet of the pallets held by the pallet holding mechanism. The pallet exchanging apparatus according to claim 1, wherein the pallet exchanging apparatus is configured to include a lifter that lowers and places the second table on the second table.   The pallet collection mechanism includes a pallet holding mechanism capable of holding a plurality of pallets stacked in a vertical position at a position above the pallet collection unit, and raising the pallet on the first table and holding it on the pallet holding mechanism. The pallet exchanging device according to claim 1, wherein the pallet exchanging device is constituted by a lifter to be operated.   The load support plate has a downward facing wall that is supported on the guide rail so as to freely reciprocate. When the second table is moved below the load support plate, the pallet on the second table faces. The pallet exchanging apparatus according to claim 1, wherein a distance between the opposing walls is set so as to enter between the walls.

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