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CN-121990379-A - Stacker crane and method for stacking products

CN121990379ACN 121990379 ACN121990379 ACN 121990379ACN-121990379-A

Abstract

The application discloses a stacker crane and a method for stacking products. The palletizer comprises a frame in which a product transfer station and a pallet carrier are disposed. The product transfer station includes a roller assembly that is cyclically movable between a first position in which the roller assembly carries product, a second position in which the roller assembly is out of supporting contact with the product, allowing the product to drop onto the tray carrier, and a third position adjacent the first position in which the roller assembly transfers the product into the product transfer station during movement from the third position to the first position. In the depth direction of the palletizer, the product conveying station has an inlet end and a stop end disposed opposite the inlet end. The product enters the product transfer station from the inlet end and the stop end is configured to prevent the product from exiting the product transfer station from the stop end. The stacker crane structure can effectively utilize vertical space, reduce the occupied area of the stacker crane and improve the space utilization rate.

Inventors

  • SHI SHENFEI
  • Shen Chenming

Assignees

  • 安徽凯乐仕科技有限公司

Dates

Publication Date
20260508
Application Date
20260408

Claims (14)

  1. 1. A palletizer comprising a frame in which a product transfer station and a pallet carriage are provided, the pallet carriage being located above the product transfer station so as to be able to receive products from the product transfer station, characterised in that, The product transfer station includes therein a roller assembly comprising a plurality of rollers and being cyclically movable between a first position in which the roller assembly is capable of carrying the product, a second position in which the roller assembly is out of supporting contact with the product to allow the product to fall onto the tray carrier, and a third position adjacent the first position and during movement of the roller assembly from the third position to the first position, conveying the product into the product transfer station; Wherein in the depth direction of the palletizer, the product conveying station has an inlet end and a stop end disposed opposite the inlet end, wherein the product enters the product conveying station from the inlet end, the stop end being disposed to prevent the product from exiting the product conveying station from the stop end.
  2. 2. A palletizer as in claim 1, wherein the product transfer station is further provided with at least one of the following structures: A stop portion disposed at the stop end, the stop portion extending along at least a portion of a width of the stacker, and And the clamping mechanism is arranged on two sides of the product conveying station in the width direction of the stacker crane, and is actuated when the product is conveyed to be contacted with the stop part, and clamps the product from two sides, so that the centering of the product is realized.
  3. 3. A palletiser according to claim 1 wherein a drive assembly is provided in the palletiser to drive the roller assembly to reciprocate between a first position and a second position, wherein the drive assembly comprises: A first motor is provided with a first motor, A driving wheel connected to the output shaft of the first motor, and And the roller of the roller assembly is connected to the transmission belt, and the transmission belt is matched with the transmission wheel so as to convert the rotation motion of the transmission wheel into the linear reciprocating motion of the roller assembly.
  4. 4. A palletizer as in claim 3, wherein the product transfer station is further provided with a roller rail disposed on at least one side of the product transfer station in the width direction of the palletizer and arranged to receive and guide the conveyor belt.
  5. 5. A palletizer as in claim 3 wherein the drive wheel is a sprocket and the drive belt is a roller chain fitted over the sprocket.
  6. 6. A palletiser according to claim 5 wherein a plurality of roller mounts are provided on the roller chain, the ends of each roller being fixedly mounted on the roller mounts by fasteners.
  7. 7. A palletizer as in claim 1, wherein the pallet carriage is arranged to be movable along the height of the palletizer towards and away from the product transfer station, and The palletizer further comprises a controller arranged to control movement of the pallet deck along the height of the palletizer such that, when stacking a first one of the products, the distance between the top of the pallet on the pallet deck and the bottom of the product conveying station is in the range of greater than 0 and less than or equal to 15 cm.
  8. 8. A palletizer as in claim 7, wherein the controller is further arranged to lower the pallet carriage by a distance equal to the thickness of the products in a direction away from the product transfer station after stacking one of the products at a time.
  9. 9. A palletizer as in claim 7, wherein the pallet stage is moved over the height of the palletizer by a lifting mechanism, wherein the lifting mechanism comprises: a second motor mounted on a frame top of the frame, and And one end of the cable is connected to the tray carrier, the other end of the cable is connected to a cable reel arranged on the top of the frame, and the cable reel is connected with an output shaft of the second motor.
  10. 10. A palletizer as in claim 1, wherein the frame has mounted thereon at least one of the following sensors: A first sensor located at the inlet end of the product transfer station for detecting whether the roller assembly is in the third position; A second sensor located near the stop end of the product transfer station for detecting whether the roller assembly is in the first position; and a third sensor located below the stop end of the product transfer station for detecting whether the roller assembly is in the second position.
  11. 11. A palletiser according to claim 2 wherein a fourth sensor is mounted on the frame, the fourth sensor being located on either side of the clasping mechanism for detecting whether the clasping mechanism is in contact with either side of the product to effect centering of the product.
  12. 12. A method of palletising products using a palletiser according to any one of claims 1 to 11, characterised in that it comprises the following steps in sequence: a) Positioning the roller assembly in the third position, lifting the tray carrier to a position a predetermined distance from the bottom of the product transfer station; b) Moving the drum assembly from the third position to the first position while delivering the product onto the drum assembly, thereby delivering the product into the product delivery station; c) Moving the drum assembly from the first position to the second position while the stop end blocks movement of the product with the drum assembly; d) During movement of the roller assembly from the first position to the second position, the product gradually comes out of contact with the roller assembly so that the product falls onto a tray carried on the tray carrier; e) When the roller assembly reaches the second position, the product falls completely onto the tray, and the tray stage is lowered by a predetermined height; f) After the pallet stage is lowered a predetermined height, the roller assembly is moved from the second position to the third position in preparation for receiving a next product.
  13. 13. The method of claim 12, wherein in step b, the product is centered when the drum assembly is moved to the first position, and after the centering operation is completed, step c is performed.
  14. 14. The method of claim 12, wherein steps a through f are cycled through a predetermined number of times to stack a plurality of the products on the tray, wherein the completion of the product stacking operation on the tray is determined based on one of the following parameters and the tray is transported to the next station: A predetermined number of said products have been stacked on said tray; the tray carrier is lowered to a predetermined height.

Description

Stacker crane and method for stacking products Technical Field The application relates to the field of logistics storage, in particular to a stacker crane for stacking products in the processes of warehousing and ex-warehouse of the products, and is particularly suitable for stacking mattresses or similar products. Background In an automatic store, a palletizer is generally provided. The stacker performs stacking operation on products before the goods are put in and put out, for example, the products are stacked on trays, the trays carrying the products are conveyed to a put-in station by a shuttle and then stored at a designated goods position on a goods shelf, or the product trays are conveyed to a put-out station for later put out. Currently, commonly used palletizers are designed primarily for applications where conventionally sized products such as cartons are palletized. Whereas for flat and large-area products such as mattresses, conventional palletizers present problems in palletizing such products, for example, because of the large area of the flat surface of the products such as mattresses, the size of the product trays for receiving the mattresses at the palletizer is also large, and thus the floor space required for palletizing operations is also large, which places more stringent demands on the distribution of storage space in places such as indoor stores. In addition, when stacking mattresses or similar products onto a product tray, there is a risk that the products may not be accurately placed onto the product tray due to the large size of the products, or that the products may be offset from the product tray to some extent, which may affect the stability of the products on the tray, in case of stacking a plurality of mattress products on the product tray, the products may fall off the tray. Therefore, there is a need for a palletizer with improved structure in the introduction of automatic stands and the like, which can be adapted to applications for storing mattresses or similar products with a large plan area, wherein the palletizer occupies a small area and enables the products to be positioned more stably on the product trays, reducing the risk of the products falling from the product trays. Disclosure of Invention The present application has been made to solve the above-mentioned problems occurring in the prior art palletizers. The object of the present application is to provide a palletizer suitable for mattresses or similar products, which has a small footprint, contributing to an increase in space utilization in warehouses. Furthermore, the stacker crane provided by the application can also improve the positioning precision of products on the product tray, thereby improving the stacking stability of the products. The application provides a stacker crane which comprises a frame, wherein a product conveying station and a tray carrying platform are arranged in the frame, and the tray carrying platform is positioned above the product conveying station so as to be capable of receiving products from the product conveying station. The product transfer station includes a roller assembly therein, the roller assembly including a plurality of rollers, and the roller assembly being cyclically movable between a first position in which the roller assembly is capable of supporting a product, a second position in which the roller assembly is out of supporting contact with the product to allow the product to drop onto the tray carrier, and a third position. The third position is adjacent the first position and the product is transported into the product transfer station during movement of the drum assembly from the third position to the first position. Wherein in the depth direction of the palletizer, the product conveying station has an inlet end and a stop end disposed opposite the inlet end, wherein the product enters the product conveying station from the inlet end, the stop end being disposed to prevent the product from exiting the product conveying station from the stop end. In the structure of the stacker crane, the roller assembly capable of reciprocating is arranged, products are stacked one by one in the process of one-time circulating movement of the roller assembly, and the structure is particularly useful for stacking mattresses with large occupied area or similar products. Moreover, through such structure, allow to arrange product conveying station and tray carrier along the direction of height of hacking machine, effectively utilize vertical space, reduce the area of hacking machine, improve space utilization. Preferably, at least one of a stopper portion provided at the stopper end and extending along at least a part of the width of the stacker, and a pinching mechanism provided at both sides of the product transfer station in the width direction of the stacker, the pinching mechanism being actuated to pinch the product from both sides when the product is conveyed into contact with th