AU2006203607A1 - Locking Device in Shelf Stands - Google Patents

Description

1Z-80-900 ale a 90:OL aGW!l :e!ieJsnv dl Aq paA!ao CSSeSt, O-IIISS :ON 1 SlOO Australian Patents Act 1990 Regulation 3.2 Original Complete Specification Standard Patent Invention Title: Locking device in shelf stands The following statement is a full description of this invention, including the best method of performing known to me: ST/E0 39Vd 8aiwmv-noI ~IlSACHK 9PO6LS6ET9 L9:60 900Z/80/TZ I.Z-80-900 ae1a 2 0:01. aw!l :eilBJsnv dl Aq pa,!aoay 9E9e9?0)-I,8S :ON (31 SVOO

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CD1 3 Locking davice in shelt stands SThe present invention relates to a device in shelf C< stands with several shelves with sloping storage trays or shelves which are extendable on a holder arm in order to facilitate replenishing and removing goods stored in the IND trays, whereby the trays are secured in the retracted position o by means of a locking device which is operated from the front \0 side of the trays.

o SUch a shelf stand is disclosed in the Swedish patent C No. 449293, wherein several circlesector-shaped, extendable shelves or trays are carried on arms extending from a central column so that the trays form a circular shelf arranged to slope slightly downwards. The trays are provided with locking means locking them in retracted and extended position respectively.

Thereby it is desired that the distance between the shelves does not appreciably exceed the height of the goods which shall be stored on the shelves so that Lhe total height of the shelf stand is as small as possible. A problem is to accomplish a locking device which does not intrude on the distance between the shelves but still enables operating the locking device from the front side of the trays.

The object of the invention is to accomplish a locking device which solveA said problem and thia object i achieved by a locking device which according to the invention obtains the characteristic features defined in the following claims.

The invention will be disclosed in greater detail with reaerence to embodiments illustrated in the drawings.

Fig.l shows an example of a shelf stand of known azL n which a locking device according to the invention may be sed.

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o 2 Fig. 2 shows a plan view of g shelf of the stand Sshown in fig. 1.

Fig. 3 shows a Perspective, cross section through the central part of an extendable tray of the stand, the tray being provided with a locking device according to the invention.

\O Fig.'4 shows on a larger scale a side view of the n. locking device shown in fi. 3 and in activated state.

Fig. 5 shows on a larger scale a cross section along o the line V-V in fig. 4.

CA Fig. 6 shows a perspective, cross section like fig. 3 through the central part of an extendable tray with another kind of locking device according to the invention.

Fig. 7 shows on a larger scale a perspective, side view of the locking device-in fig. 6.

Fiq. 8 shows on a ,larger scala a cross section along the line VIII-VIII in fig. :7.

The shelf stand shown in fig. 1 comprises a central Column 1 which is supported by a base or foot 2. The central column 1 carries several one above the other situated shelves 3 which are individually rotatable round the column 1.

Every shelf consists of several casentialty circlesector-shaped shelf sections or trays 4 extendable on arms 5 extending from a holder 6 rotatably arranged on the central column 1. The trays are provided with a cleeve-like art 7 which is telescopically placed over the corresponding arm 5 and carried on a support wheel 8 (fig, 4) so that the ray 4 may be moved between a entirely retracted and an ixtended position. The arms 5 are sloping downwards so that :hu goods on the shelf glide down against the front side ithout the necessity to extend the tray. If that does not appen or goods are being refilled on the shelf it is ecevsary to be able to extend the tray, see fig. 2 in which a ray 4 is shown extended. The extension of the trays 4 in the ST/SO 39Wd a-Wi ino iiISAanHO 9Ve0BL6E L9:B0 900/80/TZ Z-90-900Z (P-nV-A) 8leQ )0:01. (wU:H) aW!l :el Jesnv dl Aq pa!aOa8O 8EEi.SL'O-IflS :ON Gl SIlOO

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0 0 stand is limited in a way known per se e.g. by a stop screw arranged on the arms S which screw moves in a slit in the sleeve 7 of the tray 4 (not shown).

SSinc. the trays are sloping a locing device easily operated from the outer edge of the tray must in the retracted position secure the trays. Known securing means have been 0 arranged at the back edge of the tray Zacing the holder 6 and M this securing means has been operated by means of an uncovered arm arranged below the tray 4 which arm has an effect on the o space between the trays.

0g Instead, according to this invention, an elongated leat-shaped locking arm or hook 9 is provided which is shown in fig. 3-5 and which extends in a channel 10 formed on the upper aide of the tray 4 which channel is connected to the sleeve 7 and is formed by an inverted U-shaped sheet 11 which is fastened such as welded to the upper face of Lhe tray's 4 bottom essentially centrally in the tray. The channel 10 is just so much wider than the thickness of the securing hook 9 that this with little play.to the sidea of the channel 10 can move freely in the channel, while a greater play vertically allows the locking hook 9 to be brought in and out of engagement with a locking plate 12 on the front aide oZ the tray 4. To this end the locking hook 9 is at its inner end carried on a pivot 13 fastened to the inner end of the arm So that the locking hook can swing upwardly when the outer look-shaped part of the locking hook 9 catch hold over the )late id and locks the tray 4 in retracted position. The outer nd of the locking hook 9 is to this end rounded so that the ocking hook 9 is lifted when it strikes the sheet 12 and by cavity falls down with a notch 14 over the plate 12.

In the embodiment according t. Fig. 6-8 a securing ook 15, which with an upturned part 15a is carried on a pivot 34 on the arm 5 corresponding to the pivot 13 in fig, 4, is rranged flat against the underneath side of the tray 4 in a 39yd 8-13NM-Fnoi-ISAaHO 9/08696ET9 L9:60 9080/80/TZ 1-80-900o ae so O:O. ai!j :e!lejsnv dl Aq paA!aoal g9eSLG-9O-llflS :ON al S1NOO

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O 4 channel 16 which is formed by an U-uhaped plate 17 fastened Ssuch as welded to said underneath side here also essentially centrally in the tray. In this case only a small play exists (C between the securing hook 15 and Lhe sides ot the channel 16 since the hook 15 shall only be freely moveable in the longitudinal direction of the channel 16 when the tray 4 is extended. The tray 4 it thus locked in the retracted position M by a lockbolt 20 fastened at the front side of the tray which N by means of a turned part 18 engages a notch 19 in the hook Swhen the tray is rotracted. The lockbolt 20 is made of a resilient material and is biased against the locking position shown but can be removed from engagement with the notch 19 of the hook 15 by an operating arm 21 when Lhe tray 4 shall be extended.

It is obvious from the above that the embodiment with a leaf-shaped locking hook 9, 15 which is kept in a narrow channel 10, 16 above or under the tray 4 does not build upon the height of the tray but the distance between the shelves 3 may be adapted entirely to the height of the goods wlch is to be stored on the shelves.

When the trays 4 shall be extended e.g. for replenishing goods the locking hook 0 il lifted from engagement with the plate 12, see fig. 4, or the lockbolt is brought from engagement with the notch 19, see fig. 7, so that the tray is released. When the trays 4 again are retracted the locking hook 9 and 15 respectively comes into engagement with the locking plate 12 and the lockbolt espectively so that the trays are locked in their normal application positions. By the locking devices being situated t the tront edge of the trays the function will be simple and afe.

It is obvious that the invention is not limited to [he disclosed embodiments but can be altered in order to adapt ST/LB 39d E-3 irM-inoI IISANH 9S86Z36ET9 LS:60 900/80/Tz -9-9OZ~(P-bl-Ak) sIec9:OL awLj :eileilsnV dlAq PaAlaOaH 9C9CL9O-IVJGS :ON cIiSLAOO the locking devicoz to 3h*If &tandm andi trays other than those -shown.

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Claims (1)

12-80-900 alsa 90:01. aw!l :eileJlsnv dl Aq peA!ao3aa qCEGgGO-IGiaS :ON I SI 0o 0O 6 (C Claims S1. A device in shelf stands with several shelves with Sloping storage trays which are extendable on a holder arm in order to facilitate replenishing and removing goods stored in the trays, whereby the trays (4) o are secured in the retracted position by means of a N locking device which is operated from the front side of 0 the trays, characterzed in that the locking device Scomprises a leaf-shaped looking hook (9,15) which when C the tray is extended moves in a channel (10,16) arranged in the upper or under side of the tray and which at the end facing the back side of the tray is uonnected to a pivot (13,13a) in the holder arm and at the other end, when the tray is retracted, extends from the channel (10,16) with a hook-shaped part (14,19) which is arranged to cooperate with a locking plate (12,18) on the front edge of the tray and which is arranged to engage with force in the hook-shaped part (14,19) of the locking hook (9,15). 2. A device according to claim 1, characterized in that the locking hook (9,15) extends in a channel (10,16) fozed by an U-shaped sheet fastened to the upper or under side uo tne tray. 3. A device according to claim 2, characterised in that the locking hook is rotatably connected to the pivot (13) and that the U-shaped channel (10) has such height that the locking hook can be lifted over and engage a locking plate (12) on the forward edge of the tray 4. A device according to claim 2, characterized in that the locking hook (15) is arranged with little play in the channel (16) and arranged to cooperate with a locking plate rocatably arranged on the forward edge of the ST/0 39Vd 13'Mm1nOIISAdH-O St'e986L6ET9 L9:60 9003/80/IZ kZ-9O-90& 2120 SOO L (wI:H) WLL :leJIsny dl Aq pa~iaoa~ ECScLs*O-irdGS :oj CI SflOO Va o tray which plate engages the hcok-ahapvj part (19) of the locking hook (18) when the tray is retracted. A device according to any of the claims 1-4, characterized in that the engagemfent betvuen the locking hook (9,15) and the lacking plate (12,18) is by means of gravity or spring force. c Va 0N 0N 91/01T 3Sb~d a-iWmv-inoi-IISAMO 9/ BEd1V6f9 LS6H 900K/80/1Z