Storage Rack

Abstract

A storage rack comprises a plurality of stacked supporting ledges each spaced away from each other arranged in pairs on facing sidewalls for receiving plate-type carriers for stored articles. Storage and retrieval of the carriers in the storage rack is provided by means of a transport device. The supporting ledges are a snaked press fit in the sheet metal of the sidewalls and the sidewalls are secured to upright rack stanchions. To define a storage rack ensuring exact positioning of the supporting ledges, it is proposed that the rack stanchions comprise horizontally protruding pegs engaging cavities in the supporting ledges.

Description

CROSS REFERENCE TO RELATED APPLICATION

This application is a national stage application and claims the priority of German Application No. 10 2004 042 061.0 filed on Aug. 26, 2004, herein incorporated by reference.

The invention relates to a storage rack comprising a plurality of stacked supporting ledges each spaced away from each other arranged in pairs on facing sidewalls for receiving plate-shaped carriers for stored articles, wherein storage and retrieval of the carriers in supporting ledges in the storage rack being provided by means of a transport device, and wherein the supporting ledges being a snaked press fit in the sheet metal of the sidewalls and the sidewalls secured to upright rack stanchions.

Such storage racks are used for automated and space-optimized storage and retrieval of articles differing in height in a storage rack.

Described in EP 0 722 894 A1 is a storage rack comprising two high-bays with a transport device arranged inbetween. The transport device comprises a platform for storage or retrieval of carriers to storage locations. The platform is moved between an access opening and the storage locations. The carriers with the stored articles thereon are placed on the platform at the access opening.

The supporting ledges on which the carriers are guided and supported are integrated in the sidewalls. The sheet metal sidewalls are formed snaked to form the supporting ledges and welded to the upright stanchions.

Such storage racks are of considerable height. They usually comprise a plurality of sidewall elements with integrated supporting ledges secured to the stanchions of the storage rack by welds. Producing the welds may result in the sidewall elements and thus the supporting ledges not being optimally aligned, causing problems in pushing in and pulling out the carrier.

Precisely locating the supporting ledges is, however, vital for automated carrier access. Lack of precision in positioning the supporting ledges would result in tilting of the carriers, often carrying heavy loads, making carrier storage difficult or even impossible.

It is thus an object of the invention to define a storage rack which ensures precise positioning of the supporting ledges.

To achieve this object it is proposed in a generic storage rack that the rack stanchions comprise horizontally protruding pegs engaging cavities in the supporting ledges.

The invention is based on the gist that for precisely securing the sidewalls to the rack stanchions it is necessary to position the sidewalls at the rack stanchions. In accordance with the invention the rack stanchions comprise pegs which protrude from the rack stanchions such that they engage snaked cavities in the supporting ledges. The pegs can be precisely positioned at rack stanchions so that when joining the sidewall to the rack stanchions precise positioning of the supporting ledges is possible. A further advantage materializes in that due to the horizontally protruding pegs the load supported by the supporting ledges is increased as a result of which the carriers can now be devised for higher loading.

Advantage aspects of the invention read from the sub-claims.

In one advantageous aspect of the invention the pegs comprise an outer diameter which substantially corresponds to an inner spacing of the supporting ledges in thus enabling the sidewalls with the integrated supporting ledges to be simply mounted on the pegs at the rack stanchions for jointing by means of welds to the rack stanchions.

In a further advantageous aspect the pegs are aligned facing each other in a horizontally plane from facing rack stanchions Thus, simple alignment of the supporting ledges to each other can be realized. Any horizontal stagger of facing supporting ledges would result in tilting of the carriers which could lead to the articles on the carriers slipping out of place. Such a tilting of the carriers is prevented by the pegs at the rack stanchions.

In another advantageous aspect the pegs are fixed in place by means of a press fit in the rack stanchions. This facilitates applying the pegs to the rack stanchions. As an alternative the pegs can also be screwed into a tapping in the rack stanchions.

It is particularly of advantage when the pegs are gunned into the rack stanchions. This makes it necessary to drill holes in corresponding positions of the rack stanchions having a smaller dimension than the outer diameter of the pegs. The pegs are gunned into the prefabricated drilled holes, achieving simple fabrication of the rack stanchions with the pegs.

The invention will now be detailed by way of a preferred embodiment with reference to the attached diagrammatic drawings in which:

FIG. 1 is a view in perspective of a storage rack in accordance with the invention;

FIG. 2 is a section view through the storage rack as shown in FIG. 1;

FIG. 3 is a plan view on alternative peg shapes.

Referring now to FIG. 1 there is illustrated a racking system accordance with the invention comprising two facing storage racks 11, 12 spaced away from each other. Provided between the storage racks 11, 12 is a transport device 13. The transport device 13 comprises a platform 14 which is positionable in the storage rack by means of a drive system. The storage racks 11, 12 each comprise sidewalls 11a, 11b aligned parallel to each other. The sidewalls 11a, 11b consist of a plurality of elements secured to the upright rack stanchions spaced away from each other 16a and 16b by means of spot welds.

Provided at the face 17 of the storage racks 11 is an access opening 18, featuring supporting arms 19a, 19b aligned parallel to each other protrude forwards to support a carrier. Storage and retrieval of the carriers 22 with the storage articles 23 is possible via the access opening 18.

The carrier 22 comprises handles 27. Provided further is a height sensor 26 to determine the height of the storage articles 23 for storage and thus to permit location-optimized storage.

Referring now to FIG. 2 there is illustrated a section view through the rack stanchions 16a arranged at the face of the storage racks 11 and the sidewalls 11a, 11b secured thereto. The sidewalls 11a, 11b are made of sheet metal and comprise snaked press-fitted support ledges 24. Guided and supported by these support ledges 24 are the carriers 22. The snaked support ledges 24 form cavities 25 which are aligned outwardly towards the rack stanchions 16a, 10b.

Secured to the rack stanchions 16a, 16b are horizontally protruding pegs 28 on a predefined spacing correspondingly positioned. For this purpose a press fit is used preferably. For this purpose, holes are drilled in the rack stanchions 16a, 16b into which the correspondingly prefabricated pegs 28 are gunned. After the pegs 28 have been attached to the rack stanchions 16a, 16b correspondingly positioned, the sidewall 11a, 11b is mounted with the integrated support ledges 24 on the rack stanchions 16a, 16b. In this arrangement the cavities 25 of the support ledges 24 are located on the pegs so that precise positioning of the sidewalls 11a, 11b at the rack stanchions 16a, 16b materializes. After the sidewalls 11a, 11b are precisely positioned on the peg 28 the sidewall is secured to the rack stanchions 16a, 16b by means of spot welds.

Depending on how the support ledges 24 are configured, the pegs 28 may comprise differing peg cross-sections. Referring now to FIG. 3 there is illustrated a plurality of rack stanchions 16a with differing peg cross-sections.

The carrier 22 as shown in FIG. 2 is mounted between two facing rack stanchions 16a, 16b. The carrier 22 comprises a guide groove 29 in the middle so that the carrier 22 is guided on two stacked support ledges 24. By using two support ledges 24 per side a higher loading capacity for the carriers 22 is achieved. In addition, the loading capacity for the carriers 22 is increased by the use of pegs 28 since the support ledges 24 can now handle a higher shear force. Although it is possible to boost the loading capacity by dimensioning the sidewalls 11a, 11b stronger, however, thicker sidewalls would add to the weight of the storage rack and thus reduce the storage capacity of the storage rack.

Using the additional guide groove 29 permits positioning the carriers 22 also at intermediate positions in the storage racks 11, resulting in particularly space-optimized storage. This particularly effective storage requires in turn that the support ledges 24, on which the carrier 22 is guided, are positioned particularly exactly. This is ensured by using the pegs 28 in accordance with the invention, resulting in exact alignment of the support ledges 24.

Accordingly, using the pegs 28 in accordance with the invention ensures that the support ledges 24 are positioned as needed in the storage rack whilst simultaneously attaining increased loading capacity.

LIST OF REFERENCE SIGNS

• • 11 storage rack
  • 11 a, b sidewall
  • 12 storage rack
  • 13 transport device
  • 14 platform
  • 16 a, b rack stanchion
  • 17 face
  • 18 access opening
  • 19 a, b supporting arms
  • 22 carrier
  • 23 storage articles
  • 24 support ledges
  • 25 cavity
  • 26 height sensor
  • 27 handles
  • 28 peg
  • 29 guide groove

Claims

1. A storage rack comprising a plurality of stacked supporting edges each spaced away from each other and arranged in pairs on facing sidewalls for receiving plate-type carriers for stored articles, storage and retrieval of the carriers in supporting ledges in the storage rack being provided by means of a transport device, the supporting ledges being a snaked press fit in the sheet metal of the sidewalls and the sidewalls secured to upright rack stanchions, wherein the rack stanchions comprise horizontally protruding pegs engaging cavities in the supporting ledges.

2. The storage rack as set forth in claim 1, wherein the pegs comprise an outer diameter which substantially corresponds to the inner spacing of the supporting ledges.

3. The storage rack as set forth in claim 1, wherein the pegs are aligned facing each other in a horizontally plane from facing rack stanchions.

4. The storage rack as set forth in claim 1, wherein the pegs are fixed in place by means of a press fit in the rack stanchions.

5. The storage rack as set forth in claim 1, wherein the pegs can also be screwed into a tapping in the rack stanchions.

6. The storage rack as set forth in claim 1, wherein the pegs are gunned into the rack stanchions.