Multi-stage storage case for cassettes or cassette blocks

Abstract: A plurality of U-sectioned shelf units 14 are disconnectably mounted one upon another between a base unit 12 and a top unit 13, each drawer 15 for accommodating cassettes or cassette blocks 16 is inserted into each shelf unit 14 freely slidable and a projection 45 is formed on the upper edge of the rear wall 41 of the drawer 15 which disengageably engage with the indented stoppers 31 provided in the underside of the top unit 13 and each shelf unit 14 so that the drawer 15 can be pulled out stepwise because of the projection 45 being engaged with the indented stopper 31. It is convenient since the number of shelf units 14 disconnectably connected is adjustable as necessary. Also, the drawer 15 can be pulled out stepwise being stopped at any of the stoppers provided in the shelf unit, hence the drawer 15 pulled out halfway is ensured against further sliding out of the shelf unit.

Description: The present invention relates to a multi-stage storage case for cassettes or cassette blocks according to the preamble part of claim 1. Hitherto, this kind of multi-stage storage case was made of a synthetic resin such as ABS resin and, as seen from Figs. 9 and 10, its construction was such that the case housing 1 was made of a plurality (usually 6) of shelf units 2 and each shelf unit 2 has housed therein freely slidably a drawer 3, in which cassettes (or cassette blocks) 4 were stored. A pair of (left and right) indented stoppers 6 were formed under the front edge portion of a top unit 5 and shelf units 2, the rear wall 7 of each drawer 3 has formed thereon a pair of (left and right) projections 8 engageably with and disengageably from the indented stoppers 6 so as to ensure against sliding out of the drawer 3 (See Fig. 10.). With a conventional multi-stage storage case as described above, there was an inconvenience of necessarily using one whole case even for transportation of a small number of cassettes 4 for which one or two drawers 3 suffices. Another problem was that when it suffices to pull out drawers 3 only partly to take in or take out the wanted number of cassettes 4, the drawer 3 partly pulled out inclined with the front end down, this resulting in spontaneous sliding of the drawer with its own weight and that of the cassettes 4 therein and possibly sliding completely out of the case to drop because of the disconnection of the projections 8 from the indented stoppers 6. From CH-A-652 012 a multi-stage storage case for cassettes comprising a plurality of shelf units being connected upon another is known. A drawer is slidably disposed in each shelf unit having an engaging hook provided on top of a rear wall of the drawer. The engaging hook can be in brought in engagement with a first rib being provided at the rear end underside the top of the storage case and extending in a direction transversal to the pull out direction of the drawer. A second rib, also extending in the transversal direction is provided at the front end of the top of the storage case for engagement with the engaging hook provided at the rear wall of the drawer. The second transveral rib ensures that the drawer can not fall out unintentionally when pulling the drawer from the storage case. From AU-B-573 103, a modular storage cabinet system is known. The system comprises a main sleeve module in form of an open rectangular channel shaped body. Into this main sleeve a main drawer member and an insert drawer may be slidably inserted thereto and removed therefrom. A plurality of main sleeve modules may be interlocked by means of hook clips provided on the side walls of the main sleeve. The object of the present invention is to provide a multi-stage storage case with a simply constructed stopper element which ensure the drawers against unintentional falling out. This object is solved by a storage case having the features of patent claim 1. Preferred embodiments are subject to various dependent claims. The invention is described in detail with reference to a preferred embodiment which is shown in the drawings in which Fig. 1 is a front view of a multi-stage storage case for cassettes or cassette blocks showing an embodiment of the present invention. Fig. 2 is a left side view of the embodiment shown in Fig.1 Fig. 3 is a sectional view taken along the line III-III of the embodiment shown in Fig. 1 with parts thereof omitted. Fig. 4 is a sectional view taken along the line IV-IV of the embodiment shown in Fig. 3 with parts thereof omitted. Fig. 5 is an arrow view taken along the line V-V of Fig. 3. Fig. 6 is a sectional view taken along the line VI-VI of Fig. 3. Fig. 7 is a sectional view taken along the line VII-VII of Fig. 3. Fig. 8 is a sectional view taken along the line VIII-VIII of Fig. 5. Fig. 9 is a front view of an example of conventional multi-stage storage case for cassettes or cassette blocks. Fig.10 is a sectional view taken along the line X-X of Fig.9. An embodiment of the present invention will be described below in detail with reference to Figs. 1-8. The multi-stage case for storage of cassettes or cassette blocks (hereinafter called cassettes) are, as shown in Figs. 1 and 2, in which a case housing 11 is made up of a plurality (6 in the illustrated case) of shelf units 14 connected one upon another, between a base unit 12 and a top unit 13, each shelf unit 14 including a drawer 15 and in each drawer 15 a plurality of cassettes 16 are arranged erect (See the lowermost drawer shown in Fig. 3). The base unit 12, the top unit 13, the shelf units 14 and the drawers 15 are all integrated molding of synthetic resins such as an ABS resin. As shown in Figs. 3 and 4, the base unit 12 is made up of a bottom plate 17 and legs 18 extending downward from each side of the bottom plate 17. On both (left and right) sides of the topside of the bottom plate 17, there are provided 3 pairs of stopping walls 20 having indented stoppers 19 at the front ends thereof and 4 pairs of guide walls 21, 22 are arranged erect alternately and longitudinally. The front edge of the bottom plate 17 is curved downward in an arc shape to facilitate applying fingers to the inside of a handle 44 of the drawer 15 at the lowermost in pulling out the drawer (See Fig. 1.). As seen from Figs. 3 and 4, the top unit 13 is made up of a top plate 24, a front wall 25, a rear wall 26 and side walls 27 extending downward from edges of the top plate and six longitudinal ribs 28 formed in parallel downward from the underside thereof. Of these ribs 28, as seen from Fig. 4, the two (left and right) longitudinal ribs 28 have guide grooves 29 formed between them and the side walls 27 and, as seen from Figs 3 and 4, have three square holes 30. The four inside longitudinal ribs 28, as seen from Figs. 3 and 6, have a plurality (two in the illustrated case) of indented stoppers 31 at the lower front ends and between the front and rear ends. As seen from Figs. 3 and 4, the shelf unit 14 has U-shaped cross-section and is made up of a shelf board 32 has inverse L-sectioned (left and right) side walls 33 and a rear wall 34. The shelf board 32 is, as seen from Figs. 3 and 4, connected with the side walls 33 via drawer guides 35, has access holes 36 about the center for disconnecting the shelf units, has four longitudinal, parallel ribs 37 formed on its underside, as shown in Figs 3 and 6, and on both (left and right) sides of the front end of the topside there are provided recesses 38 for locking the drawer 15, as shown in Figs. 3 and 7. The drawer guide 35, like the longitudinal ribs 28 on both (left and right) sides of the aforementioned top unit 13, forms guide grooves 29 between it and the side walls 33, there are provided square holes 30 at three longitudinal positions and the longitudinal ribs 37, like the central (inside) longitudinal ribs 28 extending downward from the aforementioned top unit 13, has indented stoppers 31 at the lower front edge and a plurality (two in the illustrate case) of points between the front and rear ends. On the topside of the side (left and right) walls 33, as shown in Figs. 3-5, there are provided, as in the aforementioned base unit 12, three pairs of stopping walls 20 with indented stoppers 19 formed at the front end thereof and four pairs of guide walls 21, 22 arranged longitudinally and alternately. The base of the stopping walls 20 is formed by cutting off part of the side walls 33 in order to increase the elasticity of the stopping wall 20 (See Fig. 5.). The indented stoppers 19 of the stopping walls 20 are formed erect on the base unit 12 and the shelf unit 14 are made freely engageable with and disengageable from the square holes 30 made in the shelf unit 14 or the top unit 12 placed immediately above by the elasticity of the stopping wall 20. As seen from Figs. 3-5, the drawer 15 is made up of a front wall 40, rear wall 41 and side (left and right) walls 42 extending erect from the bottom plate 39 and its interior is partitioned by partitions 43 into a plurality of spaces. A handle is formed before the front wall 40 and on the upper edge of the rear wall 41 there is formed a projection 45 as shown in Fig. 4. This projection 45 is formed freely engageable with and disengageable from the indented stopper 31 provided in the underside of shelf unit 14 or the top unit 13 placed immediately above. The bottom plate 39 has in its topside, as shown in Figs. 5 and 8, a continuous longitudinal indentation 46 extending laterally to ensure against sliding of cassettes and also has in the front portion of the underside a plurality (four in the illustrated case) of indented stoppers 47 as shown in Figs. 3 and 7. These indented stoppers 47 are formed freely engageable with and disengageable from the drawer locking recesses 38 provided in the shelf unit 14 corresponding to the drawer 15. The cassettes 16, when they are stored in the drawer 15 erect, as shown in Fig. 3, the necessary matters such as name and date can be written on the top side thereof. In assembling the multi-stage storage case of the construction as described above, first, as shown in Figs. 3, 4 and 6, the case housing 11 is assembled by first putting between the base unit 12 and the top unit 13 a plurality of shelf units 14 and then the stopping walls 20 and guide walls 21, 22 of the base unit 12 and each shelf unit 14 are inserted into the guide grooves 29 formed in the underside of the shelf unit 14 or the top unit 13 immediately above and have each indented stopper 19 of each stopping wall 20 engaged in each square hole 30. Then, the drawer 15 is inserted into each shelf unit 14 with the handle 44 lifted up a little. The projection 45 of the rear wall 41 of the drawer 15 passes under indented stoppers 31 formed in the shelf unit 14 or the top unit 13 immediately above and, as shown in Figs. 3 and 7, the indented stoppers 47 of the drawer 15 are engaged with the recesses 38 for locking of the shelf unit 14 and the drawer 15 is locked thereby. In order to put the cassettes 16 into the drawer 15 of the multi-stage storage case thus assembled, first the handle 44 of the drawer 15 is lifted a little to disengage the recess 38 for locking the drawer 15 from the indented stopper 47 of the drawer 15, and then the drawer 15 is pulled out halfway (or entirely, if necessary). As shown in Figs. 3 and 6, the drawer 15 inclines through its own weight the front end down, the projection 45 of the rear wall 41 engages the indented stoppers 31 of the shelf unit 14 immediately above or the top unit 13 to ensure against further sliding out of the shelf unit 14. The cassettes 16 are, as shown in Fig. 3, stored in the drawer arranged erect, with the side in which the referring index is written facing up, to make it easily visible and the drawer is then pushed in. The procedure is essentially the same when the cassettes are taken out of the drawer 15. The indentation 46 (See Fig. 8.) formed in the topside of the bottom plate 39 of the drawer 15 are for ensuring against sliding or falling of the cassettes 16 as the drawer 15 is pulled out or pushed in. In disassembling the storage case into the base unit 12, the top unit 13 and and shelf units 14, all or part of the drawers 15 are pulled out, and then, with a hand inserted through the front opening of the shelf unit 14 and working with fingers through the access hole 36 to disengage the indented stoppers 19 of the stopping walls 20 of the base unit 12 or the shelf unit 14 from the square holes 30 in the shelf unit 14 or the top unit 13 for separation of the base unit 12, the top unit 13 or each shelf unit 14. It is thus possible to adjust the number of the shelf units 14 according to the number of cassettes 16 to be stored or disassemble a multi-stage storage case as a whole. Although in this embodiment the depth of each drawer 15 was made uniform but in other embodiments drawers different in depth can be used in combination so as to enable an increase of the kinds of cassettes that can be stored in a single storage case. Since, as described above, the present invention consists in putting a plurality of shelf units one upon another separably between the base unit and the top unit, the number of shelf units can be adjusted according to the number of cassettes or cassette blocks to be stored and, moreover, it is possible to use drawers different in depth in combination in a single storage case, this resulting in improved transporting and/or storing efficiency. Also, since the drawer can be pulled out stepwise with the projection formed on the upper edge of its rear wall engaged with a plurality of the indented stoppers provided in the top unit and each shelf unit immediately above, workability is improved with simultaneous increase of the drawer's holding capability to ensure against spontaneous sliding out of the drawer pulled out halfway. It is also possible to prevent spontaneous sliding of drawers out of the case due to inclination of storage case since each drawer is locked in the closed state with the indented stopper provided in the drawer engaged with the locking recess provided in the shelf unit. Further, by providing anti-sliding indentation in the topside of the bottom plate of the drawer it is possible to ensure against sliding or falling of cassettes or cassette blocks arranged erect in the drawer as it is pulled out or pushed in.

Claims: A multi-stage storage case for cassettes or cassette blocks comprising a plurality of U-sectioned shelf units (14) being connected one upon another, a drawer (15) for cassettes or cassette blocks being slidably disposed in each shelf unit (14), an upward projection (45) on top of a rear wall (41) of said drawer (15) which can be brought in engagement with a stopping means when said drawer (15) is pulled out, characterized in that said shelf units (14) are disconnectably connected between a base unit (12) and a top unit (13) and in that said stopping means comprises a plurality of first indented stoppers (31) being formed along the pulling direction in the underside of said top unit (13) and each shelf unit (14). The multi-stage storage case according to claim 1, characterized by recesses (38) for locking each drawer (15) are provided in the upper front edge portion of each shelf unit (14), and a plurality of second indented stoppers (47) are provided in the lower front edge portion of each drawer (15) engageable with and disengageable from said recesses (38) to thereby lock said drawer (15) in the closed position. The multi-stage storage case according to claim 1 or 2, characterized by a continuous indentation (46) being formed in the topside of a bottom plate (39) of said drawer (15) to ensure against sliding of cassettes or cassette blocks.

Inventors: MURAZUMI TAKUYA, MURAZUMI, TAKUYA
Applicants: MURAZUMI IND CO LTD, MURAZUMI INDUSTRIAL CO., LTD.
Application year: 1992
Main classification: B01L11
IPC codes: B01L11, A61B19, G01N33, A47B88, A47B87, B65D6, A61B10