EP0624327B1 - Improvements relating to pull-out shelf support systems - Google Patents
Improvements relating to pull-out shelf support systems Download PDFInfo
- Publication number
- EP0624327B1 EP0624327B1 EP94300389A EP94300389A EP0624327B1 EP 0624327 B1 EP0624327 B1 EP 0624327B1 EP 94300389 A EP94300389 A EP 94300389A EP 94300389 A EP94300389 A EP 94300389A EP 0624327 B1 EP0624327 B1 EP 0624327B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shelf
- roller means
- frame
- intermediate member
- journalled
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B88/00—Drawers for tables, cabinets or like furniture; Guides for drawers
- A47B88/40—Sliding drawers; Slides or guides therefor
- A47B88/49—Sliding drawers; Slides or guides therefor with double extensible guides or parts
- A47B88/493—Sliding drawers; Slides or guides therefor with double extensible guides or parts with rollers, ball bearings, wheels, or the like
Definitions
- This invention relates to pull-out shelf support systems according to the preamble of claim 1. It is primarily concerned with such systems for use in an industrial context, for example in racking for stores, where hundreds of different items may be held, some of them heavy and awkward to handle.
- the problem is that the shelf needs to be supported when drawn out, and in order to provide sufficient counteracting force to the tendency of the shelf to tip, it is usual for there to be a limit on the horizontal movement, leaving the rear portion of the shelf, perhaps up to one third of the total area, still within the fixed framing. Although this makes it better than fixed shelving, there are still access problems. It is desirable to have the shelf pulled out so that its total area is exposed.
- Certain lightweight structures such as filing cabinets, have solved this problem by the use of an intermediate runner at each side which travels by means of ball bearings or rollers on rails fixed to the cabinet and which itself provides ball bearing or roller support for a track on the drawer to run on. As the drawer is pulled out, the runners move with it, but travel half the distance.
- DE-U-8714720 discloses a pull out drawer system in which there is an intermediate member at each side of the drawer with rollers on that member and on the drawer and the supporting frame arranged so that the drawer can be fully pulled out while the intermediate members travel half the distance.
- the intermediate members and the tracks for the rollers are pressed steel strips configured so that all the rollers at each side are in the same vertical plane for space saving, and this gives them a weakness that makes them unsuitable for heavy loads.
- a pull-out shelf support system within a fixed frame comprising, for each side of a shelf, an intermediate member for travel partially with the shelf, first roller means journalled at the front of the frame to support the intermediate member, second roller means journalled on the intermediate member and co-operating with a level track provided on or by the frame, third roller means journalled at or near the forward end of the intermediate member to support the shelf, and fourth roller means journalled at or near the rear of the shelf and co-operating with a level track provided on or by the intermediate member, the arrangement being such that the roller means enable the shelf to run on the intermediate members and the intermediate members to run with respect to the frame, and so that on pulling out the shelf, the latter shifts with respect to the intermediate members while being supported horizontally thereby, and the intermediate members shift with respect to the frame while being supported horizontally thereby, characterised in that each intermediate member is an elongate plate in a vertical plane, its lower edge bearing on the first roller means, in that the track of the intermediate member is a longitudinal slot in
- each track on the fixed frame comprises two horizontal rails one above the other.
- the second roller means may then be a wheel which runs between them, sometimes bearing on the lower rail (when the shelf is pushed in) and sometimes on the underside of the upper rail (when the shelf has been pulled out a certain distance).
- the plates form the sides of a frame underlying the shelf, and which therefore moves with the shelf when that is pulled out, although not to the same extent.
- the various roller By selection of tolerances and the frictional characteristics of the various roller means it can be ensured that the shelf completes its travel before the intermediate members start to move, or vice versa. There may be situations where this is more desirable than having simultaneous movement.
- a framework is constructed of metal angles and box sections to have uprights 1, horizontal members 2 and angled braces 3.
- construction is conventional and will not be described in detail.
- vertical dotted lines representing a possible fourth upright.
- This specification is primarily concerned with single entry shelving 4 which can only be pulled out one way, to the right as seen in Figure 1.
- double entry shelving is also possible, where a shelf 5 can be pulled out to one side or the other, as illustrated low down. For this, the extra upright may be needed.
- a single entry shelf can only be pulled out so that about 60% of its plan area is exposed beyond the framework. This is indicated by the upper shelf 4.
- the object here is to increase that to 100% as indicated by the lower shelf 4.
- each upright 1 has a roller 7 journalled on the inside, slightly below the rails 6.
- These rails and the rollers 7 support an intermediate frame 8 shown in Figures 2 and 3.
- This is rectangular in plan and comprises flat vertical plates 9 at each side spanned at intervals by box section beams 10.
- the plates 9 are substantially rectangular, their upper edges being well above the beams 10, and at the rear a flat bar 11 is welded between the plates 9 above the adjacent beam 10 to provide a stop.
- Each side plate 9 has an elongate slot 12 with rounded ends extending lengthwise of it, starting a short distance from the rear end and terminating just beyond the mid point. To the rear of this slot 12, and centred below its lower edge, there is a roller 13 carried on the outside of the frame 8 by a short axle 14 extending through the plate and anchored in a block 15 secured to the front of the rear beam 10. Each roller 13 fits with a very small clearance between the associated rails 6 so that it either runs on the lower rail or engages the underside of the upper rail. At the forward end of the intermediate frame 8, the bottom edges of the side plates 9 bear on the rollers 7 fitted to the uprights 1.
- the side plates 9 carry further rollers 16 on the inside, their uppermost segments being proud of the beams 10.
- a shelf 17 is also basically a rectangular frame, having vertical rectangular side plates 18 spanned by beams 19. These support a rigid sheet 20 which provides the bearing surface of the shelf. Towards the rear of each plate 18 a roller 21 is journalled on the outside which engages in the associated slot 12 in similar fashion to the rollers 13 between the rails 6. The lower edge of each side plate 18 bears on the associated roller 16.
- the shelf 17 sits within the tray-like structure provided by the intermediate frame 8, while the latter is supported by the rails 6 and the rollers 7.
- the shelf 17 is stopped by the bar 11, with the rollers 21 at the rear ends of the slot 12.
- the intermediate frame 8 is arrested by the framework.
- the shelf 17 is pulled out horizontally, and it can shift with respect to the intermediate frame 8 a distance corresponding to the length of the slots 12.
- the frame 8 is entrained and continued pulling draws it out, running on the rollers 7 and 13.
- the limit of its travel is defined by stops (not shown) but when achieved the shelf 17 is fully clear of the framework and thus fully accessible.
- the shelf is simply pushed in again.
- the same principles can apply, but of course the intermediate frame 8 and the shelf 17 will be symmetrical, with the slot 12 and the rollers 13 and 21 central, and extra rollers 7 and 16. It would be advisable to have a catch arrangement, releasable from either end, to hold the shelf centred and to prevent overshoot when being pushed back into the frame.
Description
- This invention relates to pull-out shelf support systems according to the preamble of
claim 1. It is primarily concerned with such systems for use in an industrial context, for example in racking for stores, where hundreds of different items may be held, some of them heavy and awkward to handle. - Conventionally, such racking is provided by framing assembled in rows with alleyways between. Fixed shelves have their limitations, since if they are too deep, items get lost at the back, or are, at least, difficult to see and retrieve, particularly with high racking, a narrow alleyway and top lighting.
- It is therefore better, unless only very shallow shelving is required, to have pull-out shelves, bringing items at the middle and towards the back of the shelf out into the alleyway beyond the fixed framing. They can then be seen and easily taken.
- However, the problem is that the shelf needs to be supported when drawn out, and in order to provide sufficient counteracting force to the tendency of the shelf to tip, it is usual for there to be a limit on the horizontal movement, leaving the rear portion of the shelf, perhaps up to one third of the total area, still within the fixed framing. Although this makes it better than fixed shelving, there are still access problems. It is desirable to have the shelf pulled out so that its total area is exposed.
- Certain lightweight structures, such as filing cabinets, have solved this problem by the use of an intermediate runner at each side which travels by means of ball bearings or rollers on rails fixed to the cabinet and which itself provides ball bearing or roller support for a track on the drawer to run on. As the drawer is pulled out, the runners move with it, but travel half the distance.
- While these have proved satisfactory in that context, scaling them up to support large shelves with heavy machine parts on them is not practical.
- DE-U-8714720 discloses a pull out drawer system in which there is an intermediate member at each side of the drawer with rollers on that member and on the drawer and the supporting frame arranged so that the drawer can be fully pulled out while the intermediate members travel half the distance. However, the intermediate members and the tracks for the rollers are pressed steel strips configured so that all the rollers at each side are in the same vertical plane for space saving, and this gives them a weakness that makes them unsuitable for heavy loads.
- It is the aim of this invention to enable a load bearing member such as a shelf or drawer to be rolled out fully from its supporting frame and thus to support loads substantially greater than those previously managed.
- According to the present invention there is provided a pull-out shelf support system within a fixed frame comprising, for each side of a shelf,
an intermediate member for travel partially with the shelf,
first roller means journalled at the front of the frame to support the intermediate member,
second roller means journalled on the intermediate member and co-operating with a level track provided on or by the frame,
third roller means journalled at or near the forward end of the intermediate member to support the shelf, and
fourth roller means journalled at or near the rear of the shelf and co-operating with a level track provided on or by the intermediate member,
the arrangement being such that the roller means enable the shelf to run on the intermediate members and the intermediate members to run with respect to the frame, and so that on pulling out the shelf, the latter shifts with respect to the intermediate members while being supported horizontally thereby, and the intermediate members shift with respect to the frame while being supported horizontally thereby, characterised in that each intermediate member is an elongate plate in a vertical plane, its lower edge bearing on the first roller means, in that the track of the intermediate member is a longitudinal slot in which the fourth roller means runs bearing on the bottom edge or the top edge of the slot depending on the balance of the shelf and how much it has been pulled out, and in that the second roller means is outboard of the plate and the third roller means is inboard of the plate. - Preferably, each track on the fixed frame comprises two horizontal rails one above the other. The second roller means may then be a wheel which runs between them, sometimes bearing on the lower rail (when the shelf is pushed in) and sometimes on the underside of the upper rail (when the shelf has been pulled out a certain distance).
- Preferably, the plates form the sides of a frame underlying the shelf, and which therefore moves with the shelf when that is pulled out, although not to the same extent. By selection of tolerances and the frictional characteristics of the various roller means it can be ensured that the shelf completes its travel before the intermediate members start to move, or vice versa. There may be situations where this is more desirable than having simultaneous movement.
- For a better understanding of the invention, one embodiment will now be described, by way of example,- with reference to the accompanying drawings, in which:
- Figure 1 is a diagrammatic side elevation of a fixed frame containing pull-out shelving,
- Figure 2 is a plan view of an intermediate moving frame,
- Figure 3 is a section on the line III-III of Figure 2,
- Figure 4 is a fragmentary section on the line IV-IV of Figure 2,
- Figure 5 is a plan view of a pull-out shelf,
- Figure 6 is a section on the line VI-VI of Figure 5, and
- Figure 7 is a fragmentary front elevation of one side of the fixed frame showing adjacent parts, some in vertical cross section, of the intermediate frame and shelf.
-
- Referring to Figure 1, a framework is constructed of metal angles and box sections to have
uprights 1,horizontal members 2 and angled braces 3. Generally, construction is conventional and will not be described in detail. However, there is a variation indicated by the vertical dotted lines representing a possible fourth upright. This specification is primarily concerned withsingle entry shelving 4 which can only be pulled out one way, to the right as seen in Figure 1. But double entry shelving is also possible, where ashelf 5 can be pulled out to one side or the other, as illustrated low down. For this, the extra upright may be needed. - Conventionally, a single entry shelf can only be pulled out so that about 60% of its plan area is exposed beyond the framework. This is indicated by the
upper shelf 4. The object here is to increase that to 100% as indicated by thelower shelf 4. - At each shelf level, the sides of the framework are fitted with pairs of
horizontal rails 6, one rail being above the other. At the front of the framework, each upright 1 has a roller 7 journalled on the inside, slightly below therails 6. These rails and the rollers 7 support anintermediate frame 8 shown in Figures 2 and 3. This is rectangular in plan and comprises flatvertical plates 9 at each side spanned at intervals bybox section beams 10. Theplates 9 are substantially rectangular, their upper edges being well above thebeams 10, and at the rear aflat bar 11 is welded between theplates 9 above theadjacent beam 10 to provide a stop. - Each
side plate 9 has anelongate slot 12 with rounded ends extending lengthwise of it, starting a short distance from the rear end and terminating just beyond the mid point. To the rear of thisslot 12, and centred below its lower edge, there is aroller 13 carried on the outside of theframe 8 by ashort axle 14 extending through the plate and anchored in ablock 15 secured to the front of therear beam 10. Eachroller 13 fits with a very small clearance between the associatedrails 6 so that it either runs on the lower rail or engages the underside of the upper rail. At the forward end of theintermediate frame 8, the bottom edges of theside plates 9 bear on the rollers 7 fitted to theuprights 1. - Near the front of the
intermediate frame 8, theside plates 9 carryfurther rollers 16 on the inside, their uppermost segments being proud of thebeams 10. - Referring now to Figures 4 and 5, a
shelf 17 is also basically a rectangular frame, having verticalrectangular side plates 18 spanned bybeams 19. These support arigid sheet 20 which provides the bearing surface of the shelf. Towards the rear of each plate 18 aroller 21 is journalled on the outside which engages in the associatedslot 12 in similar fashion to therollers 13 between therails 6. The lower edge of eachside plate 18 bears on the associatedroller 16. - When the parts are assembled, the
shelf 17 sits within the tray-like structure provided by theintermediate frame 8, while the latter is supported by therails 6 and the rollers 7. When pushed back into the storage position, theshelf 17 is stopped by thebar 11, with therollers 21 at the rear ends of theslot 12. Theintermediate frame 8 is arrested by the framework. - To gain clear access, the
shelf 17 is pulled out horizontally, and it can shift with respect to the intermediate frame 8 a distance corresponding to the length of theslots 12. When it reaches the limit of this travel, theframe 8 is entrained and continued pulling draws it out, running on therollers 7 and 13. The limit of its travel is defined by stops (not shown) but when achieved theshelf 17 is fully clear of the framework and thus fully accessible. - To restore the storage position, the shelf is simply pushed in again.
- For double entry shelving, the same principles can apply, but of course the
intermediate frame 8 and theshelf 17 will be symmetrical, with theslot 12 and therollers extra rollers 7 and 16. It would be advisable to have a catch arrangement, releasable from either end, to hold the shelf centred and to prevent overshoot when being pushed back into the frame.
Claims (4)
- A pull-out shelf support system within a fixed frame (1,2,3) comprising, for each side of a shelf (17),
an intermediate member (8) for travel partially with the shelf (17),
first roller means (7) journalled at the front of the frame to support the intermediate member (8),
second roller means (13) journalled on the intermediate member (8) and co-operating with a level track (6) provided on or by the frame (1,2,3),
third roller means (16) journalled at or near the forward end of the intermediate member (8) to support the shelf (17), and
fourth roller means (21) journalled at or near the rear of the shelf (17) and co-operating with a level track (12) provided on or by the intermediate member (8),
the arrangement being such that the roller means enables the shelf (17) to run on the intermediate members (8) and the intermediate members to run with respect to the frame (1,2,3) and so that on pulling out the shelf (17), the latter shifts with respect to the intermediate members (8) while being supported horizontally thereby, and the intermediate members (8) shift with respect to the frame (1,2,3) while being supported horizontally thereby, characterised in that each intermediate member (8) is an elongate plate in a vertical plane, its lower edge bearing on the first roller means (7), in that the level track (12) of the intermediate member is a longitudinal slot in which the fourth roller means (21) runs bearing on the bottom edge or the top edge of the slot depending on the balance of the shelf (17) and how much it has been pulled out, and in that the second roller means (13) extend from the outer face of the plate (8) and the third roller means (16) extend from the inner face of the plate. - A system according to Claim 1, characterised in that each track on the fixed frame (1,2,3) comprises two horizontal rails (6) one above the other.
- A system according to Claim 2, characterised in that the second roller means (13) is a wheel which runs between the two rails (6), sometimes bearing on the lower rail (when the shelf is pushed in) and sometimes on the underside of the upper rail (when the shelf has been pulled out a certain distance).
- A system according to Claim 1, 2 or 3, wherein said plates (8) form the sides of a frame underlying the shelf (17), and which therefore moves with the shelf when that is pulled out, although not to the same extent.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9300903 | 1993-01-19 | ||
GB9300903A GB2274241B (en) | 1993-01-19 | 1993-01-19 | Improvements relating to pull-out shelf support systems |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0624327A2 EP0624327A2 (en) | 1994-11-17 |
EP0624327A3 EP0624327A3 (en) | 1996-06-19 |
EP0624327B1 true EP0624327B1 (en) | 2002-09-04 |
Family
ID=10728882
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94300389A Expired - Lifetime EP0624327B1 (en) | 1993-01-19 | 1994-01-19 | Improvements relating to pull-out shelf support systems |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0624327B1 (en) |
DE (1) | DE69431268T2 (en) |
GB (1) | GB2274241B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6329428B1 (en) * | 1998-11-05 | 2001-12-11 | Taiho Pharmaceutical Co., Ltd. | Therapeutic drug for the treatment of micturition disorders |
GB0118435D0 (en) | 2001-07-28 | 2001-09-19 | Rack Internat Uk Ltd | Improvements relating to storage structures with moving shelves |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH350773A (en) * | 1957-02-26 | 1960-12-15 | Dintheer Jules | Furniture with a fully extendable drawer |
US4482066A (en) * | 1982-09-24 | 1984-11-13 | Dykstra Donald P | Storage rack with an extendible shelf structure |
DE8714720U1 (en) * | 1987-11-05 | 1987-12-17 | Ziehl, Gustav, 5000 Koeln, De |
-
1993
- 1993-01-19 GB GB9300903A patent/GB2274241B/en not_active Expired - Fee Related
-
1994
- 1994-01-19 DE DE69431268T patent/DE69431268T2/en not_active Expired - Lifetime
- 1994-01-19 EP EP94300389A patent/EP0624327B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0624327A2 (en) | 1994-11-17 |
EP0624327A3 (en) | 1996-06-19 |
GB2274241A (en) | 1994-07-20 |
DE69431268D1 (en) | 2002-10-10 |
DE69431268T2 (en) | 2003-12-11 |
GB9300903D0 (en) | 1993-03-10 |
GB2274241B (en) | 1996-06-05 |
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