JPS6253404B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cargo loading/unloading device in which a conveyor for transferring cargo to and from a shelf is provided on an elevating carriage so as to be movable in directions near and far from the shelf.

In this type of device, a drive roller for scooping up the lower front end of the load on the shelf is provided at the shelf side end of the conveyor, and when carrying out the load from the shelf, the conveyor is moved toward the shelf side. By using the rollers to scoop up the bottom surface of the front end of the load on the shelf, the rollers pull the load onto the conveyor and the conveyor pulls the load to the center of the carriage. If there is a mixture of large and wide objects, as shown in FIGS. 1A and B, use a pair of left and right rollers 1 and 2 as the drive rollers for pulling in the load at intervals that match the width of the narrow bucket bag 3. It was set up. Reference numeral 4 denotes a load receiving conveyor provided on the elevating carriage, and can be moved in the direction of distance from and near the shelf 5 (in the direction of arrow 6). 7
are a pair of left and right load guide bars whose spacing can be changed according to the width of the load.

With the above-mentioned conventional apparatus, it is possible to carry the narrow bucket bag 3 out of the shelf 5 or into the shelf 5 as shown in FIG. When carrying out, the rollers 1 and 2 act on the center of the lower front end of the wide bucket bag 8, so if the load inside the bag bag 8 is uneven in the width direction, the center of gravity may be shifted in the width direction. If it is off center or if the bucket is
If the frictional resistance between the bucket and the shelf 5 is not equal in the horizontal width direction due to the deformation of the bottom surface of the bucket, the bucket 8 may rotate on the shelf 5 when the bucket 8 is pulled onto the conveyor 4 by the rollers 1 and 2. Therefore, there were cases where it became impossible to pull the bucket 8 between the load guide bars 7. Furthermore, when carrying the above-mentioned wide bucket cart 8 onto the shelf 5, a part of the bucket cart 8 is transferred onto the shelf 5, and then the bucket cart 8 is sent onto the shelf 5 by the rollers 1 and 2. At this time, the bucket 8 rotates so that one of the left and right sides of the bucket 8 is left behind, and the bucket 8 is also placed on the shelf 5.
There were cases where it was not possible to completely transfer the data to the above.

The present invention aims to solve the above-mentioned problems, and one embodiment thereof will be described below based on illustrative drawings.

In FIGS. 2 and 3, reference numeral 10 denotes an elevating carriage provided on a traveling body that can run along a shelf, and a conveyor frame 11 is mounted on the elevating carriage 10, a guide rail 12 and guide rollers 13, 13a. It is supported so as to be movable in the direction of distance (in the direction of arrow 6) with respect to the shelf. 1
Reference numeral 4 denotes a conveyor traverse motor that drives one of the guide rollers 13a in any forward or reverse direction to cause the conveyor frame 11 to traverse, and is supported by the conveyor frame 11. Reference numeral 15 denotes a roller conveyor provided on the conveyor frame 11, including a plurality of conveyor rollers 16 that are pivotally supported on the conveyor frame 11, and a chain transmission means 1 that interlocks and connects the conveyor rollers 16 with each other.
7, and a drive motor 18. 19a, 19b and 20a, 20b are a pair of left and right load-drawing drive rollers disposed adjacent to both front and rear ends of the roller conveyor 15,
Chain transmission means 2 are respectively supported on the conveyor frame 11 and connected to adjacent conveyor rollers 16.
Spline shafts 22 and 23 are interlocked and connected via 1.
It is fitted and supported so that it can move laterally. 24 and 25 are the load pulling drive rollers 19 located on the same side.
A, 20a and 19b, 20b are a pair of left and right lateral motion frames that rotatably hold the front and rear end portions thereof, and female screw bodies 26, 27 fixed to the bottom of each of these lateral motion frames 24, 25 are connected to the conveyor frame. They are individually screwed into the left and right threaded portions 28a and 28b of a threaded shaft 28 supported by the screw shaft 11, which are arranged in opposite directions. Reference numeral 29 denotes a drive motor interlockingly connected to the screw shaft 28. 30a and 30b are a pair of left and right load guide bars disposed above the roller conveyor 15,
They are each supported by the transverse movement frames 24 and 25 via a support member 31 passing between them.

According to the above configuration, when carrying out the bucket 3 or 8 from the shelf 5 as shown in FIG. 1A and B,
The screw shaft 28 is rotated forward or reverse by the motor 29, and the pair of left and right lateral movement frames 24, 25 are moved laterally in a direction toward each other or in a direction away from each other, thereby driving both load-drawing drive rollers 19a, 19b.
20a, 20 are laterally moved on the spline shafts 22, 23, and the load guide bars 30a, 30b are laterally moved on the roller conveyor 15. In this way, the distance La between the load-pulling drive rollers 19a, 19b and between the load-pulling drive rollers 20a, 20b is adjusted to the pair of left and right load guide bars 30.
The distance Lb between a and 30b is the bucket to be handled 3
Or adjust the spacing so that it is slightly wider than the width of 8. At this time, the drive roller 1 for drawing both loads
Drive roller 20 between 9a and 19b and for pulling in both loads
The distance La between a and 20b is the bucket 3 to be handled.
or 8, and the interval corresponds to the vicinity of both ends of the bucket bag 3 or 8 in the width direction.

In such a state, the load pulling drive rollers 19a~
The elevator carriage 10 is raised and lowered to a position where the carriage 20b is raised, and each roller 16 of the roller conveyor 15 and the load-drawing drive rollers 19a to 20b are moved up and down.
is driven in the loading direction by the motor 18, and
The conveyor frame 11 is moved by the motor 14 to the side of the shelf 5 where the bucket carts to be carried out are supported, and the front end left and right sides of the bucket carts 3 or 8 protruding from the shelf 5 are moved, for example, by drive rollers 19a,
Scoop up with 19b. As a result, Bucket 3 or 8
is drawn onto the roller conveyor 15 by the loading drive rollers 19a and 19b, and is conveyed to the center position of the elevating carriage 10 by the conveyor roller 16.

When carrying the bucket 3 or 8 on the roller conveyor 15 onto the shelf 5, the operation opposite to the above may be performed.

The device of the present invention can be implemented as described above, and its characteristics include a movable frame (conveyor frame 11 in the embodiment) that is movable in far and near directions with respect to the shelf on the elevating carriage; , a conveyor that transfers loads to and from the shelves, and a pair of left and right load-drawing drive rollers that are adjacent to the shelf-side end of this conveyor and that scoop up the bottom surface of the front end of the loads on the shelves. The width is kept constant, and only the pair of left and right load-drawing drive rollers is configured so that the interval can be changed.

According to such a device of the present invention, the distance between the left and right pair of load-drawing drive rollers is changed according to the width of the load to be carried in and carried out, and both drive rollers are always positioned at both ends of the load in the bottom width direction, regardless of the width of the load. Since loading and unloading work can be carried out while the load is acting on nearby areas, even if the load is wide and the center of gravity is biased to one side in the width direction, the load can be moved between the shelf and the conveyor. It is possible to carry out loading or unloading operations safely and reliably by moving parallel lines in a straight line between the two.

Furthermore, according to the present invention, since only the distance between the left and right pair of load-drawing drive rollers is changed,
Compared to the load-pulling drive roller, the structure is extremely simple and can be implemented at low cost compared to the case where the conveyor, which is large and heavy, is divided into left and right halves and each side is moved horizontally together with the load-pulling drive roller. At the same time, there is an advantage that the power required for changing the interval is small.

[Brief explanation of the drawing]

FIG. 1 is a plan view explaining a conventional example, FIG. 2 is a plan view showing an embodiment of the present invention, and FIG. 3 is a front view of the same. 1, 2, 19a to 20b... Drive roller for loading, 3... Small bucket bag, 4, 15... Roller conveyor for transferring cargo, 5... Shelf, 7, 30a, 30...
Load guide bar, 8... Wide bucket cart, 10... Lifting carriage, 11... Conveyor frame (movable frame), 12... Guide rail, 14... Conveyor traverse motor, 16... Conveyor roller, 18... Conveyor drive motor, 22, 23... Spline shaft, 24, 25... Lateral movement frame, 26, 27... Female threaded body, 28... Threaded shaft, 29... Spacing change motor.

Claims (1)

[Claims] 1. A movable frame is provided on the elevating carriage and is movable in the near and far directions with respect to the shelf, and on this frame,
A conveyor that transfers loads to and from the shelves, and a pair of left and right load-drawing drive rollers that are adjacent to the shelf-side end of this conveyor and that scoop up the bottom surface of the front end of the loads on the shelves. A loading/unloading device for loading/unloading cargo between shelves, the width being constant, and only the pair of left and right loading drive rollers being configured to have a variable interval.