FR2839626A1 - Shelf installation, has interlocking component which cooperates with the movement of the movable shelf body at arbitrary stages to facilitate the movement of the fall preventing body - Google Patents

Abstract

A fall preventing body (60), which is capable of freely moving at the front-and-back direction, is provided at the lower portion of a shelf frame (1). An interlocking component (70) cooperates with the movement of the movable shelf body (40) at arbitrary stages to facilitate the movement of the fall preventing body.

Description

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 The present invention relates to a rack fitted with at least one movable shelf which can be moved forwards and backwards between a position extended out of a rack frame and a position retracted into the rack.

 Shelves of this type are already known and in particular conventional shelving, the structure of which is described in the Japanese patent application published before examination under the number H4-30807, for example. In this structure, two left and right guide rails are mounted on a rack frame, and a sliding plate is supported and guided by means of guide rollers on these guide rails so that they can be taken out and returned.

 In this system of the prior art, the sliding tray corresponding to the desired shelf is pulled forward relative to the front plane of the rack frame, so that objects can be placed on the sliding tray thus removed or removed from this one.

 However, in the conventional structure described above, if a heavy object is placed on the extended sliding tray, an unbalanced load is exerted on the shelf corresponding to the sliding tray, which results in an unstable state in which the system is likely to tip over. The state is particularly unstable if nothing is stored on the other retracted sliding trays.

 One of the methods to remedy this problem consists in fixing to the ground the lower part of the frame of the

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 shelving using anchor bolts, as proposed in the Japanese utility certificate published under S60-38905, for example, but there is always a risk of incorrect installation of anchor bolts, and , in some cases, anchor bolts cannot be used, for example, in the case of a rented warehouse.

 Another means proposed to remedy the above problem consists in providing feet which extend forward from the lower part of the front support uprights of the rack frame, as in the Japanese utility certificate published under the number H3- 37445.

In this case, however, the legs extend continuously forward relative to the rack frame, even when all of the sliding trays are retracted, but they cannot extend far enough for various considerations, such as efficient use of floor space. In addition, the sliding trays are taken out and returned thanks to an extension and retraction system, which generates an unbalanced load which can become unstable when a sliding tray is taken out over its entire length out of the rack frame.

 In view of the above, the main object of the present invention is to propose a shelving unit equipped with at least one mobile shelf, which is capable of correctly supporting an unbalanced load when the mobile shelf is advanced.

 Another object of the present invention is to propose a shelving unit equipped with at least one movable shelf, which is capable of correctly supporting a load.

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 unbalanced when the mobile shelf is advanced by being extended.

 The present invention also aims to provide a rack equipped with multiple mobile shelves which is capable of correctly supporting an unbalanced load when any one of the multiple mobile shelves is advanced by being extended.

 To achieve the above goals and according to a first aspect of the present invention, there is provided a rack equipped with at least one movable shelf, characterized in that it comprises: a rack frame; a movable shelf which is mounted in the rack frame being supported and guided by a guide device, and which can move forward and backward; an anti-tip safety device which is provided in a lower part of the rack frame and which can move forwards and backwards; a clutch link mechanism for advancing and retreating the anti-tip safety device in a functional relationship with the advancement and retreat of the movable shelf.

 Thanks to this structure of the shelving of the invention, when the mobile shelf is advanced while being supported and guided by the guide device, the anti-tip safety device can be removed via the clutch link mechanism, while that when the mobile shelf is moved back, the anti-tip safety device can be retracted via the clutch link mechanism.

Consequently, the exit of the anti-tip safety device over a sufficient length makes it possible to

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 adequately compensate for an unbalanced load when the shelf is advanced, whereby the system is always in a stable state in which it cannot tip, regardless of the load it carries. This stable state can be maintained whether or not anchor bolts are used. In addition, the floor space can be used more efficiently thanks to the fact that the anti-tip safety device can be retracted.

 In accordance with a first characteristic of this shelving of the invention, several mobile shelves can be arranged in a vertical row, and the anti-tip safety device can be advanced and moved back in a functional relationship with the advancement and retreat of one any of the mobile shelves.

 Thanks to this first feature, when any of the movable shelves are advanced, the anti-tip safety device can be pulled out via the clutch link mechanism and, therefore, the present invention can be easily used in a shelving with multiple movable shelves arranged in a vertical row and can provide good storage efficiency.

 According to a second characteristic of this shelving of the invention, several mobile shelves can be arranged in a vertical row and, when any of the mobile shelves is advanced or moved back, the other mobile shelves can be locked in their moved back position by locking means.

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 Thanks to this second characteristic, when any of the movable shelves is advanced, the others can be retained against the forward and backward movement by the locking means, which automatically prevents a sliding movement (d 'forward or backward') of two shelves at the same time.

 According to a third characteristic of this shelving unit of the invention, the clutch connection mechanism can comprise a vertical connecting member which is guided on the rack frame and which is movable forwards and backwards, member which can be designed so that its lower part is connected to the anti-tip safety device and so that an advanced mobile shelf is able to engage with it.

 With this third characteristic, when a movable shelf is advanced, it is engaged with the connecting member so that the anti-tip safety device is advanced integrally, whereby the clutch connecting mechanism can have a simple configuration.

 According to a second aspect of the present invention, there is provided a shelving unit equipped with at least one mobile shelf, characterized in that it comprises: a shelving frame; a movable shelf which is mounted in the rack frame being supported and guided by a guide device, and which can move forward and backward; the movable shelf being adapted to be extendable forward and retractable rearward, and having a distal end portion in the form of a shelf member for supporting stored objects;

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 an anti-tip safety device which is provided in a lower part of the rack frame and which can move forwards and backwards; a clutch link mechanism for advancing and retreating the anti-tip safety device in a functional relationship with the advancement and retreat of the movable shelf.

 Thanks to the structure of this shelving of the present invention, when the mobile shelf is extended and advanced while being supported and guided by the guide device, the anti-tip safety device can be removed via the linkage mechanism. clutch, while when the movable shelf is retracted and moved back, the anti-tip safety device can be retracted via the clutch link mechanism. Consequently, the exit of the anti-tip safety device over a sufficient length makes it possible to compensate correctly for an unbalanced load when the movable shelf is advanced, whereby the system is always in a stable state in which it cannot tilt, independently of the charge he carries. This stable state can be maintained whether or not anchor bolts are used, and floor space can be used more effectively due to the fact that the anti-tip safety device can be retracted. In addition, when the mobile shelf is extended and advanced, the element provided at its distal end can be positioned sufficiently forward relative to the rack frame so that objects can be loaded on the shelf and unloaded easier and faster.

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 Preferably, this shelving according to the invention comprises several mobile shelves arranged in a vertical row, and the anti-tip safety device is advanced and moved back in a functional relationship with the advancement and retreat of any of the mobile shelves, l 'forward and backward accompanying the extension and retraction of the mobile shelf.

 Thus, when any of the movable shelves are extended and advanced, the anti-tip safety device can be pulled out via the clutch link mechanism and, therefore, the present invention can be easily used in a rack having multiple mobile shelves arranged in a vertical row and can provide good storage efficiency.

 Also preferably, several movable shelves are arranged in a vertical row and, when any of the movable shelves is advanced or retracted while being extended or retracted, the other movable shelves are locked in their retracted position and retracted by means of locking.

 In this way, when any of the movable shelves are extended and advanced, a movement of advance and retreat of the other movable shelves is prevented by the locking means, which automatically prevents sliding / (advancement or retreat ) two shelves at the same time.

 Preferably, the clutch link mechanism comprises a vertical link member guided on the rack frame and movable forwards and backwards, link member which is designed so that its lower part

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 is connected to the anti-tip safety device and so that a blocking element provided on an advanced mobile shelf is able to engage with it.

 Thus, when a movable shelf is advanced, the locking element is engaged with the connecting member so that the anti-tip safety device can be advanced integrally, whereby the clutch connecting mechanism can have a simple configuration.

 According to a third aspect of the present invention, there is provided a rack fitted with at least one movable shelf, characterized in that it comprises: a rack frame; several mobile shelves which are mounted in the rack frame being supported and guided by a guide device, and which can move forward and backward, each mobile shelf being extendable forwards and retractable towards the rear and comprising a part of distal end in the form of a shelf member for supporting stored objects; an anti-tip safety device which is provided in a lower part of the rack frame and which can move forwards and backwards; a clutch link mechanism for advancing and reversing the anti-tip safety device in a functional relationship with the advancement and retreat of any of the movable shelves.

 Thanks to the structure of this shelving according to the invention, when any of the shelves is advanced while being extended while being supported and guided by the guide device, the

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 anti-tip safety device can be pulled out via the clutch link mechanism, while when any of the shelves are retracted and pulled back, the anti-tip safety device can be pulled in via the clutch link mechanism . The present invention can therefore be easily used in a shelving system comprising several movable shelves arranged in a vertical row and can offer a satisfactory storage efficiency. Simultaneously, the output of the anti-tip safety device over a sufficient length makes it possible to absorb, as appropriate, an unbalanced load when any of the mobile shelves are advanced. Thus, the system always remains in a stable state in which it is not likely to tip over, whatever the load it carries. This stable state can be maintained whether or not anchor bolts are used, and floor space can be used more effectively due to the fact that the anti-tip safety device can be retracted. In addition, when one of the movable shelves is deployed and extended, the element provided at its distal end can be positioned sufficiently forward relative to the rack frame so that objects can be loaded on the shelf and discharged from it more easily and quickly.

 Preferably, when any of the movable shelves is advanced or retracted while being extended or retracted, the other movable shelves are locked in their retracted position and retracted by locking means.

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 Thus, when any of the movable shelves is moved forward or backward while being extended or retracted, an advance or retreat of the other movable shelves can be prevented by the locking means, which automatically prevents two shelves from sliding (from move forward or backward) at the same time.

 Also preferably, in this shelving according to the invention, the clutch connecting mechanism comprises a vertical connecting member which is guided on the rack frame and which is movable forwards and backwards, connecting member which has a lower part connected to the anti-tip safety device and which is capable of abutting rearwards against a stop element provided on each movable shelf, while a coupling device intended to extend or retract the shelf progressively mobile is positioned between the rack frame and the clutch link mechanism.

 In this way, each mobile shelf can be advanced while gradually being extended, and moved back while being gradually retracted by means of the coupling device, which allows more regular extension and retraction of the mobile shelves. Likewise, if vibrations or an external force, for example, tend to force the anti-tip safety device and the clutch link mechanism to back together when a shelf is out, the link member will abut against the 'stopper element which is provided on the side of the movable shelf output, from the front, which will prevent a recoil of the connecting member, that is to say a return movement thereof.

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 In accordance with a particular characteristic of this shelving of the invention, the coupling device comprises a shaft disposed at a specified location on the connecting member, two plates forming front and rear cams mounted separately on the shaft so as to be able to slide towards up and down, latches formed on opposite sides of each cam plate, cam rollers mounted on the cam plates, a biasing member for biasing the cam plates pivotally in directions bringing the cam rollers to approach each other, and a guide member intended to guide the cam rollers, guide member which comprises a horizontal cam limiting face formed in its direction oriented from the front towards the rear, the cam rollers being guided by the cam limiting face, which forces the cam plates to pivot against the biasing force of the biasing member for bringing the latches to positions located in front and behind a locking finger provided on the side of the movable shelf, while when one of the cam rollers is uncoupled from a front or rear end of the face cam limiter, one of the cam plates is made to pivot under the effect of the biasing force of the biasing member, which forces its latch to leave the front or the rear of the locking finger.

 Thus, a movable shelf can, while being advanced and moved back, be extended and retracted gradually so as to be both automatic and reliable thanks to the actuation of the various members of the coupling device.

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 In accordance with an additional characteristic of this shelving of the invention, each shelf is provided with locking means intended to lock the mobile shelf retracted in its retracted position, locking means which comprise an anti-lifting safety device comprising, formed on it, an anti-lifting surface facing downwards, and a locking member pivotally disposed vertically at a front end of the anti-lifting safety device, the locking member adopting an inclined position in which its lower end moves back when it has pivoted in its extreme lower position, so that the locking finger provided on the side of the movable shelf and a shaft of the coupling device abut against the front surface of the locking member and act on it , while the locking finger abuts against the rear surface of the locking member and has git on it.

 Thanks to this characteristic, the side of the mobile shelf can, both automatically and reliably, pass from a locked state to an unlocked state and vice versa, by actuating the various members of the locking means in at the same time as the advancement and retreat of the mobile shelf.

 The foregoing, as well as other objects, characteristics and advantages of the present invention, will emerge more clearly from the following detailed description of embodiments given by way of non-limiting example with reference to the appended drawings in which:

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 Figure 1 is a side view of a rack fitted with at least one movable shelf, according to one of the embodiments of the present invention; Figure 2 is a front view of the shelving of the invention; Figure 3 is a side view of a guide device provided in the shelving of the invention; Figure 4 is an exploded side view of the mobile shelf of the shelving of the invention; Figure 5 is a truncated side view showing an essential part of the shelving of the invention; Figure 6 is a truncated side view showing the essential part of the shelving; Figure 7 is a front view in vertical and truncated section showing the essential part of the shelving; Figure 8 is a truncated front view showing an intermediate portion of the shelving; Figure 9 is a truncated plan view showing a rail for supporting the shelving of the invention; Figure 10 is a truncated plan view showing an anti-tip safety part of the shelving of the invention; Figure 11 is a plan view and partially in section of the shelving guide device; Figure 12 is a plan view and partially in section of a movable intermediate element of the shelving; Figure 13 is a plan view and partially in section of a rack frame member; Figure 14 is a truncated side view showing the shelving in a state in which the movable shelf is slightly advanced, to illustrate the operation thereof;

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 Figure 15 is a truncated side view showing the shelving in a state in which the intermediate movable member is slightly advanced, to illustrate the operation of the movable shelf; Figure 16 is a truncated side view showing the shelving in a state in which the movable shelf and the anti-tip safety device are both advanced.

 Embodiments proposed by way of example of the shelving of the present invention will now be described with reference to the drawings.

 In the embodiment of FIGS. 1 and 2, a frame 1 of the shelving comprises, inter alia, two front left and right support uprights, two rear left and right support uprights 3, a system of braces 4 which connects the uprights of front support 2 to the rear support uprights 3, a crossover of reinforcements 5 which connects the rear support uprights, an upper frame (fixed plate of the upper extreme level) 6 which connects the upper parts of the support uprights 2 and 3, and a lower support 7 located between the lower parts. The rack frame 1 is, for example, fixed to the ground B at specific points by anchor bolts 8 situated at the lower ends of the support uprights 2 and 3.

 A guide device 10 with three height levels (which may in fact have one or more levels) is installed in the frame 1 of the shelving. Specifically, as can be seen in Figures 1, 3.5 to 7 and 12, the guide device 10 has two left and right guide rails 11. These guide rails 11 are U-shaped and have open turned parts

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 laterally which are arranged face to face in the forward and backward direction, their upwardly facing surfaces forming support surfaces 11a, while their inwardly facing surfaces form guide surfaces IIb.

 The guide rails 11 have fixing lugs 12 and 13 connected at their ends, on the outside. The guide rails 11 are fixed by locking elements formed on the lugs 12 and 13, from the front and the rear, to locking elements formed on the support posts 2 and 3. An intermediate stop 14 and a rear stopper 15 are provided inside each of the guide rails 11, while a rotary guide member (such as a support roller) 17 is mounted by means of a vertical axis 16 on the front end part.

 The guide rails 11 are connected to the fixing lugs 12 and 13 at their upper parts, in the vertical direction, and the receiving rollers 19 are rotatably mounted by means of shafts 18 oriented in a straight direction. left below the guide rails 11 using the front legs 12. The front leg 12 located on one side (the left side) is provided with a shaft 21 which turns to the right and to the left via a support member 20, a rotary control member 22 being mounted on the outer end of this rotary shaft 21, while a non-return mechanism 23 is mounted on the inner end of the latter. The bodies 11 to 23 mentioned above, among others, constitute an example of the guide device 10.

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 Support rails 30 are mounted between the lower ends of the fixing lugs 12 and 13 of the lowest-lying guide device 10. These support rails 30 are U-shaped. Their open sides turned laterally are arranged face-to-face in the direction oriented towards the front and towards the rear, their surfaces turned upwards forming support surfaces 30a, while their inwardly facing surfaces form guide surfaces 30b. It is assumed here that the support rails 30 are long enough to extend slightly forward relative to the front support uprights 2, elements forming feet 31 being provided on the side of their lower surface, elements forming feet which establish a contact with soil B.

 A mobile shelf 40 guided and supported by the guide device 10 and able to move forward and backward is provided with the two left and right guide rails 11 of the guide device 10 provided at each level, mobile shelf 40 which is designed to be extendable forward and retractable back. Specifically, as can be seen in FIGS. 4 to 6, 12 and 13, the mobile shelf 40 has an expandable structure on several levels which includes one (or more) intermediate mobile element 41 and a shelf element 51 which constitutes its part distal end and which is used to support objects.

 The intermediate movable element (secondary plate) 41 mentioned above is in the form of a flat frame, the lower surfaces of the sides of which form supported surfaces 41a, the intermediate movable element 41 therefore being arranged between the

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 guide rails 11 and moving on the receiving rollers 19 via the supported surfaces 41a.

 Castors 43 are mounted by means of axes 42 oriented in a right-left direction on the outer sides, at the rear part, of the intermediate movable element 41. The casters 43 are designed to roll on surfaces support 11a of the guide rails 11, between the stops 14 and 15 provided on these guide rails 11. Rotary guide members 45 are mounted by means of vertical axes 44 on the outer sides of the intermediate movable element 41, near the rollers 43. The rotary guide members 45 are designed to bear against the guide surfaces 11b of the guide rails 11.

 Support rollers 47 are rotatably mounted via axes 46 oriented in a right-left direction on the inner sides, at the front, of the intermediate movable member 41, while rotary guide members 49 are mounted via vertical axes 48 on the inner sides of the intermediate movable element 41, near these support rollers 47. Guide elements 50 consisting of two upper and lower plates are provided on the inner sides, from the middle to the rear of the intermediate movable element 41.

 The shelf element (main tray) 51 mentioned above is in the form of a flat frame, the lower surfaces of the sides of which form supported surfaces 51a, the shelf element 51 therefore being disposed between the guide rails 11 and

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 moving on the support rollers 47 via the supported surfaces 51a.

 Casters 53 are mounted via axes 52 oriented in a right-left direction on the outer sides, at the rear part, of the shelf element 51. The casters 53 are designed to roll while being inserted in the guide elements 50, between front and rear stops 50a and 50b provided on these guide elements 50. Rotary guide members 55 are mounted by means of vertical axes 54 on the outer sides of the element forming a shelf 51, near the rollers 53. The rotary guide elements 55 are designed to bear against guide surfaces 50c formed by the inwardly facing surfaces of the guide elements 50.

 A blocking bar 56 is mounted on the upper surface of one side (the left side) of the shelf member 51. The front end of this blocking bar 56 forms an anti-extension blocking member 56a which allows the non-return mechanism 23 turned towards the rear to move into the locking position, while the rear end of the locking bar 56 forms a non-withdrawal blocking element 56b allowing the non-return mechanism 23, which has made a turn to be turned towards the front, to get into the blocking position.

A finger-shaped locking member 57 projects from the top of the rotary guide member 55 at the rear end portion on the other side (the right side) of the shelf member 51 The above-mentioned organs 41 to 57, among others, constitute

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 an example of each movable shelf 40 provided at different levels located one above the other.

 An anti-tip safety device 60 able to move forwards and backwards is provided between the two left and right support rails 30 below the mobile lower shelf 40. More specifically, as shown in Figures 5,6 and 10, the main part 61 of the anti-tip safety device 60 mainly comprises two elements 61a oriented in a front-rear direction, on the left and right sides, and an element 61b oriented in a right-left direction, and is in the form of a flat frame comprising at the front a concave part 61d which is open towards the front.

 The directional elements 61a directed towards the front and towards the rear are U-shaped and are arranged so that their open section is turned downwards, rollers 63 being mounted by means of right-hand steering axes. left 62 on the rear end part, on the inner side, of these elements 61a.

 The rollers 63 are designed to roll on the support surfaces 30a of the support rails 30. Rotary guide members 65 are mounted by means of vertical axes 64 on the outer sides of the elements 61a oriented in the front-rear direction , near the rollers 63. The rotary guide members 65 are designed to bear against the guide surfaces 30b of the support rails 30.

 Legs 66 whose height position is adjustable using a system of nuts and bolts are mounted on the front end parts of the sides

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 interiors of the elements 61a. The feet 66 are here adjusted to be arranged above the support surfaces 30a by forming a space therewith. The above-mentioned members 61 to 66, among others, constitute an example of the anti-tip safety device 60.

 Support and guide means 33 of the anti-tip safety device 60 are mounted on the front end parts of the support rails 30. More specifically, L-shaped lugs 34 are fixed to the support surfaces 30a of the support rails 30, support rollers 36 being rotatably mounted via right-left steering pins 35 on these legs 34. These support rollers 36 are positioned inside the front-rear steering elements 61a and are designed to support the surfaces 61e facing downwards, of these elements 61a.

 Rotary guide members 38 are mounted by means of vertical axes 37, inter alia, near the support rollers 36. The rotary guide members 38 are also arranged inside the front-rear steering elements 61a and are designed to bear against the surfaces 61f facing inwards, elements 61a. The above-mentioned members 34 to 38, among others, constitute an example of the support and guide means 33.

 As can be seen in FIGS. 1, 5 and 10, a clutch link mechanism 70 is provided for advancing and retreating the anti-tip safety device 60 in a functional relationship with the advancement and retreat of the shelf mobile 40. The anti-tip safety device 60 is designed to move forwards and backwards in functional relation with

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 the advancement and retreat of any movable shelf 40 during extension and retraction thereof.

 More specifically, a connecting member 71 in the form of a C-shaped configuration rail is arranged vertically on the interior side of the system of struts 4, between the support uprights 2 and 3 located on one side (the right side) . The lower end of the connecting member 71 is connected to the anti-tip safety device 60 by means of a lug 72 and fixing means (such as a nut and a bolt) 73. The members are connected between them rearward, on the outer surface of the steering element 61a facing forward and backward. A guide roller 75 which engages from below in a guide rail 76 of forward and rearward direction, provided between the upper ends of the support posts 2 and 3, is mounted by the intermediate a vertical axis 74 on the upper end of the connecting member 71.

 The clutch link mechanism 70 therefore comprises the vertical link member 71 which is guided on the side of the frame 1 of the rack and which is capable of moving forward and backward, the lower part of this link member 71 being connected to the anti-tip safety device 60. The members 71 to 76 mentioned above, among others, constitute an example of the clutch link mechanism 70. A stop element 58 which projects laterally on the lower surface, at the rear, of the intermediate movable element 41 of the movable shelf 40 is designed to be able to come into contact (in abutment) with (against) the rear surface 71a of the connecting member 71, from the rear.

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 As shown in FIGS. 1, 5, 6 and 14, a coupling device 80 allowing a progressive extension and retraction of the mobile shelf 40 is interposed between the side of the frame 1 of the shelving and the side of the connection mechanism d 'clutch 70. More specifically, a shaft 81 which projects laterally is provided at a specific location of the connecting member 71, shaft 81 to which a front cam plate 82 and a rear cam plate 85 are fixed so as to be able rotate up and down separately. Latches 82a and 85a are respectively formed on mutually opposite sides of the lower surfaces of these cam plates 82 and 85, while cam rollers 84 and 87 are rotatably mounted via horizontal axes 83 and 86 on the parts of free ends.

 A helical spring (by way of example of a biasing member) 88 is mounted on the shaft 81, between the cam plates 82 and 85, the free ends of this coil spring 88 being flared and striking the cam plates 82 and 85, which causes them to pivot upward in the direction in which the cam rollers 84 and 87 approach each other.

At the point where the cam rollers 84 and 87 are closest to each other, the angle formed by the line connecting the axial center of the shaft 81 and the axial center of the horizontal axes 83 and 86 is substantially 100 degrees. When the cam plates 82 and 85 have pivoted down against the biasing force of the helical spring 88, their latches 82a and 85a are positioned in front of and behind the locking finger 57 of the shelf element 51.

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 A guide member 90 for guiding the cam rollers 84 and 87 is provided on the side of the guide rail 11 of the guide device 10. Specifically, the guide member 90 is in the form of a guide rail the front end part of which is connected to the front end part of the guide rail 11 by means of a lug 91, among others, and the rear end part of which is connected to an anti-lifting safety device (which will be described later). A horizontal cam limiting face 90a is formed in the front-rear direction on the lower surface of the guide member 90, a front end cam face 90b in the form of an upwardly projecting part being formed at the front end portion, while a rear end cam face 90c in the form of an upwardly projecting portion is formed at the rear end portion.

 When the cam rollers 84 and 87 are guided by the cam limiting face 90a, the cam plates 82 and 85 pivot down against the biasing force of the helical spring 88, and their latches 82a and 85a are arranged face-to-face in front of and behind the locking element 57 provided on the side of the movable shelf 40. When the front cam roller 84 is found in front of the front end cam face 90b, the cam plate front 82 pivots upwards against the biasing force of the helical spring 88, and the latch 82a leaves by moving up the front of the locking element 57. Similarly, when the rear cam roller 87 is found behind the rear end cam face 90c, the rear cam plate 85 pivots

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 upwards against the biasing force of the helical spring 88, and the latch 85a leaves by moving up the front of the locking element 57. The members 81 to 91 mentioned above, inter alia, constitute a example of the coupling device 80.

 Each level of the system is designed so that, when any of the movable shelves 40 extends and advances or retracts and retreats, the other shelves 40 are locked by the locking means 95 at their respective retracted retracted positions. .

 Specifically, an anti-lift safety device 97 facing down is mounted by means of a lug 96, or the like, on the side of the upper surface, at the rear end part, of the guide rail 11. An anti-lifting surface 97a facing downwards is formed on this anti-lifting safety device 97, the locking finger 57 of the shelf element 51 being turned towards this anti-lifting surface 97a from below. A locking member 99 is mounted via a left-right steering axis 98 on the front end part of the anti-lift safety device 97 so as to be able to pivot up and down.

 The locking member 99 is designed so that its lower end is inclined backwards at the lower limit of its pivoting movement, where it abuts against the guide rail 11. In this inclined state, the front side is formed by a pivot guide surface 99a and the rear side by a locking surface 99b. The locking finger 57 provided on the side of the mobile shelf 40 or

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 the shaft 81 of the coupling device 80 abuts against the pivoting guide surface 99a and acts on it, the locking finger 57 abuts against the locking surface 99b and acts on it. As mentioned previously, the rear part of the guide member 90 is connected to the upper part of the anti-lifting safety device 97. The abovementioned members 96 to 99, among others, constitute an example of the locking means 95.

 The operation of the embodiment described by way of example above will now be explained.

 Figures 1, 2 and 5 show a state in which all the movable shelves 40 and the anti-tip safety device 60 are returned. Specifically, the intermediate mobile element 41 of the mobile shelf 40 is in its retracted position in which it is supported, at the front, by the receiving rollers 19 via the supported surfaces 41a, and, at the rear , by the support surfaces 11a via the rollers 43, which constitutes the retracted position. The shelf element 51 of the mobile shelf 40 is in its retracted position in which it is supported, at the front, by the support rollers 47 by means of the supported surfaces 51a, and, at the rear, by the guide elements 50 by means of the rollers 53. On the other hand, the anti-tip safety device 60 is also in its retracted position in which it is supported, at the front, by the support rollers 36 by via the surface 41e facing downwards, and, at the rear, by the support surfaces 30a via the rollers 63.

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 Since the downward-facing non-return mechanism 23 can engage the anti-extension locking member 56a of the locking bar 56, the shelf member 51 is unlikely to advance accidentally. In the clutch link mechanism 70, the link member 71 thereof is moved back as far as possible, where the shaft 81 of the coupling device 80 abuts against the pivot guide guide surface 99a and forces the locking member 99 to pivot upwards and backwards.

 The coupling device 80 is designed so that the rear cam roller 87 is found behind the rear end cam face 90c, so that the rear cam plate 85 pivots upwards against the biasing force of the helical spring 88 and so that the latch 85a thereof rises from behind the locking element 57. The front cam roller 84 is guided by the cam limiting face 90a, the front cam plate 82 pivots down against the biasing force of the helical spring 88 and the latch 82a thereof faces the locking finger 57 provided on the side of the movable shelf 40, from the front.

The locking finger 57 crosses the region of the locking member 99 and faces from below the anti-lifting surface 97a of the anti-lifting safety device 97, which prevents the mobile shelf 40 from being raised accidentally.

 To bring out the lowest movable shelf 40, for example, which is in this retracted state, the non-return mechanism 23 is first of all turned towards the front by means of the rotary control member 22, which uncouples it from the element

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 anti-extension lock 56a. Then, the user places a hand on the shelf member 51 and exerts a tensile force. This simply has the effect of sliding the shelf element 51 outwards and passing the locking finger 57 provided on the side of the shelf element 51 under the anti-lifting surface 97a, the rear cam plate 85 and the locking member 99.

 When the shelf has thus slightly slid outwards, the locking finger 57 which has passed under the locking member 99, engages from the rear with the latch 82a of the front cam plate 82 of the device coupling 80, which causes the connecting member 71 to slide in an integral manner by means of the shaft 81 of the coupling device 80. During this movement, the cam roller 87 the rear cam plate 85 is guided by the cam limiting face 90a, which results in a downward pivoting of the rear cam plate 85 against the biasing force of the helical spring 88, and by the fact that the latch 85a thereof faces the locking finger 57 from the rear. Therefore, as shown in Figure 14, the shelf member 51, the connecting member 71 and the anti-tip safety device 60 are advanced integrally.

 The advancement of the shelf element 51 takes place here in a stable and regular manner in a state in which the supported surfaces 51a are supported by the support rollers 47, the lateral surface 51b being guided by the rotary guide members 49,

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 while the rear rollers 53 are supported by the guide elements 50 and the rotary guide members 55 are guided by the guide surfaces 50c. Similarly, the advancement of the connecting member 71 via the coupling device 80 takes place in a stable and regular manner in a state in which the guide roller 75 situated at the level of the upper end is guided by guide rail 76.

 On the other hand, the advance of the anti-tip safety device 60 takes place in a stable and regular manner in a state in which the surfaces 61e thereof facing downwards are supported by the support rollers 36, the surfaces 41f facing inwards being guided by the rotary guide members 38, while the rear rollers 63 are supported by the support surfaces 30a and that the rotary guide members 65 are guided by the guide surfaces 30b. Due to the presence of the concave part 61d formed here in the anti-tip safety device 60, the latter does not risk coming into contact with the feet, for example, of the user.

 Once the shelf element 51, the connecting member 71 and the anti-tip safety device 60 have been integrally advanced over a certain distance, the rotary guide members 55 abut against the stops 50a, which has the effect of advancing integrally the movable intermediate element 41. When the shelf element 51 and the movable intermediate element 41 are then advanced integrally on a

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 certain distance, the cam roller 84 of the front cam plate 82 is found in front of the front end cam face 90b, as in FIG. 15, the front cam plate 82 pivots upwards against the biasing force of the helical spring 88 and the latch 82a thereof rises from in front of the locking finger 57.

 The advance movement therefore continues in a state in which the shelf element 51 and the intermediate movable element 41 are combined, the clutch link mechanism 70 being immobilized, while the intermediate movable element 41 moves with respect to the guide device 10. The advance of the intermediate movable element 41 then takes place in a stable and regular manner in a state in which the supported surfaces 41a of the latter are supported by the receiving rollers 19, the surfaces 41b being guided by the rotary guide members 17, while the rear rollers 43 are supported by the support surfaces 11a and the rotary guide members 45 are guided by the guide surfaces 11b.

 This advance of the intermediate movable element 41 is stopped when the rotary guide members 45 collide with the intermediate stop 14. Consequently, as shown in FIG. 16, the mobile shelf 40 can be advanced by lengthening relative to the intermediate movable member 41, movement in which the non-return mechanism 23 which was turned forwards is automatically engaged with the non-retractable locking element 56b, which prevents the movable shelf 40 from accidentally reversing .

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 When the lower extreme mobile shelf 40 has thus been advanced and extended, it is then possible, for example, to place an object A to be stored on the shelf element 51, at the level of the distal end part, or d 'remove the stored object A from the shelf element 51. If, at this time, the shelving tends to tilt forward due to an unbalanced load, for example, the feet 66 of the storage device anti-tip safety 60 will come into contact with the floor B and prevent this tilting. During the tasks described above, the object to be stored can also be temporarily placed on the intermediate mobile element in the form of a flat frame 41, for example.

 As described above, when the movable shelf 40 located at the lowest level is advanced and extended, the anti-tip safety device 60 is advanced integrally thanks to the clutch link mechanism 70, while the devices d coupling 80 located at the other levels of the shelving unit also move in solidarity at the same time as the advance of the clutch link mechanism 70. More specifically, the coupling devices 80 located at the other levels move in the direction forward at the same time as the connecting member 71 via the shaft 81, this movement of the shaft 81 pivoting down the locking member 99 on the axis of left-right direction 98 and bringing its lower end into abutment against the upper part of the guide rail 11.

 At this time, since the corresponding movable shelf 40 is not advanced, its locking finger 57 is positioned below and across the surface

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 anti-lifting 97a of the anti-lifting safety device 97, as can be seen in the upper level of FIG. 16, and the locking surface 99b of the locking member 99 faces this locking finger 57 from the front. Consequently, if the shelf element 51 of any of the other levels tends to advance accidentally, its locking finger 57 will abut against the locking surface 99b and prevent this advancement, the locking means 95 preventing therefore automatically sliding two shelves.

 As explained above, if vibrations or an external force, for example, tend to cause an integral retreat of the anti-tip safety device 60 and the connecting member 71 while a shelf element 51 is advanced to that different tasks can be performed, the rear surface 71a of the connecting member 71 will abut against the stop element 58 provided on the side of the shelf element 51 advanced, which will prevent the backward movement (this is i.e. the return movement) of the connecting member 71.

 As also explained previously, to move the movable shelf 40 back once different types of tasks have been performed on the advanced shelf member 51, the non-return mechanism 23 is first turned backwards by through the rotary control member 22, which uncouples it from the anti-shrinkage blocking element 56b. Then, the user places a hand on the shelf member 51 and exerts a pushing force. First of all, this only has the effect of sliding towards

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 inside the shelf element 51, after which the rollers 53 abut against the stops 50b, to allow the intermediate movable element 41 to slide inwardly integrally.

 Before and after this integral sliding movement, the locking finger 57 provided on the side of the shelf element 51 is engaged from the front with the latch 85a of the rear cam plate 85 of the coupling device 80, which results in an integral sliding movement towards the inside of the connecting member 71 thanks to the coupling device 80. In other words, the anti-tip safety device 60 is driven in a sliding movement integral towards the interior via the connecting member 71.

 Once the shelf has been almost completely retracted, the locking finger 57 first abuts against the pivoting guide surface 99a of the locking member 99 and pivots the locking member upwards. 99, which has the effect of passing the locking finger 57 through the locking member 99 and bringing it to a position situated opposite the anti-lifting surface 97a of the anti-lifting safety device 97, from the below. Then, the shaft 81 of the coupling device 80 abuts against the pivoting guide surface 99a of the locking member 99, which makes the locking member 99 pivot upwards. In the coupling device 80, the rear cam roller 87 is found behind the rear end cam face 90c, which allows the latch 85a to rise from the rear of the locking element 57. As shown in

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 Figures 1, 2 and 5, this results in a return to the initial state in which all the mobile shelves 40 and the anti-tip safety device 60 are returned.

 In the embodiment proposed by way of example above, the mobile shelf 40 is designed to be extendable and retractable by means of the intermediate mobile element 41 and the shelf element 51, but a configuration of shelves mobile consisting only of non-extendable and non-retractable shelves or an expandable and retractable configuration on several levels, comprising two or more intermediate mobile elements, for example, can be used in place of the configuration described.

 Likewise, in the above example, a pull or a push exerted by a human is used to move the movable shelf 40 forward or backward during the extension or retraction thereof; a configuration using an electric motor, or a similar member, to ensure a movement of mechanical advance and retreat can also be used.

 In the example described above, the anti-tip safety device 60 is designed such that the feet 66 whose height position is adjustable are mounted on the front end portion of the main part 61; a configuration comprising rollers mounted on the front end portion of the main part 61 is also conceivable.

 Similarly, in the example proposed above, the frame 1 of the shelving is fixed at a specific location on the floor B using the anchor bolts 8 at the bottom of the support uprights 2 and 3 ; East

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 however, it is possible to maintain a stable forward and backward movement without these anchor bolts 8. In this case, the work of installing the anchor bolts is eliminated, and it is possible to easily change the place of installation of shelving fitted with mobile shelves.

 On the other hand, in the above example, the clutch link mechanism 70 includes the use of the link member 71, but it is obviously possible to use a configuration in which means in the form metallic wires, chains or devices similar to cords are used to ensure the connection in place of the connection member 71.

 Likewise, in the example proposed above, several mobile shelves 40 are arranged one above the other; however, a configuration in which a single movable shelf 40 is provided can also be envisaged.

 Similarly, in the above example, when any of the movable shelves is advanced or retracted while being extended or retracted, the other movable shelves 40 are locked in their respective retracted positions by the locking means 95 ; locking means 95 can however be omitted.

 Furthermore, in the example proposed above, the locking finger 57 provided on the side of the movable shelf 40 advanced can come into engagement via the coupling device 80 with the connecting member 71 of the locking mechanism. clutch link 70; however, in the case where there is only one movable shelf 40, for example, different configurations can be

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 used for the clutch link mechanism 70, such as for example a link between the mobile shelf 40 and the link member 71.

 Finally, if in the embodiment proposed by way of example above, the guide member 90 is installed above the mobile shelf 40, it is nevertheless possible to envisage a configuration in which the member guide 90 is installed below the movable shelf 40.

 Although the previous description related to a particular embodiment of the invention, it is of course not limited to the specific example described and illustrated here and those skilled in the art will readily understand that many other variants and modifications can be made without departing from the scope of the invention.

Claims (13)

1. Shelving equipped with at least one mobile shelf, characterized in that it comprises: a shelving frame (1); a movable shelf (40) which is mounted in the frame (1) of the shelving being supported and guided by a guide device (10), and which can move forward and backward; an anti-tip safety device (60) which is provided in a lower part of the rack frame (1) and which can move forwards and backwards; a clutch link mechanism (70) for advancing and reversing the anti-tip safety device (60) in a functional relationship with the advancement and retreat of the movable shelf (40).  2. Shelving according to claim 1, characterized in that several mobile shelves (40) are arranged in a vertical row, and in that the anti-tip safety device (60) is advanced and moved back in a functional relation with the advance and the recoil of any of the movable shelves (40).  3. Shelving according to claim 1 or 2, characterized in that several mobile shelves (40) are arranged in a vertical row, and in that, when any one of the mobile shelves is advanced or moved back, the other mobile shelves are locked in their retracted position by locking means (95).  4. Shelving according to claim 1, characterized in that the clutch connection mechanism (70) comprises a vertical connection member (71) guided on the <Desc / Clms Page number 37>  frame (1) of the rack and movable forwards and backwards, connecting member (71) which is designed so that its lower part is connected to the anti-tip safety device (60) and so that a movable shelf ( 40) advanced be able to engage with him.  5. Shelving fitted with at least one mobile shelf, characterized in that it comprises: a shelving frame (1); a movable shelf (40) mounted in the frame (1) of the shelving being supported and guided by a guide device (10), and which can move forward and backward; the movable shelf (40) being designed to be extendable towards the front and retractable towards the rear, and comprising a distal end part in the form of a shelf element (51) intended to support objects (A ) stored; an anti-tip safety device (60) which is provided in a lower part of the rack frame (1) and which can move forwards and backwards; a clutch link mechanism (70) for advancing and reversing the anti-tip safety device (60) in a functional relationship with the advancement and retreat of the movable shelf (40).  6. Shelving according to claim 5, characterized in that several mobile shelves (40) are arranged in a vertical row, and in that the anti-tip safety device (60) is advanced and moved back in a functional relationship with the advance and the recoil of any of the movable shelves, the advancement and recoil accompanying the extension and retraction of the movable shelf (40). <Desc / Clms Page number 38>  7. Shelving according to claim 5 or 6, characterized in that several mobile shelves (40) are arranged in a vertical row, and in that, when any of the mobile shelves is advanced or retracted while being extended or retracted , the other mobile shelves are locked in their retracted position and moved back by locking means (95).  8. Shelving according to claim 5, characterized in that the clutch connecting mechanism (70) comprises a vertical connecting member (71) guided on the frame (1) of the shelving and movable forwards and towards the rear, and in that this connecting member (71) is designed so that its lower part is connected to the anti-tip safety device (60) and so that a blocking element provided on a movable shelf (40) advanced is able to come into engagement with him.  9. Shelving equipped with at least one mobile shelf, characterized in that it comprises: a shelving frame (1); a plurality of mobile shelves (40) which are mounted in the frame (1) of the shelving being supported and guided by a guide device (10), and which can move forward and backward; movable shelf (40) being extendable forward and retractable rearward and having a distal end portion in the form of a shelf member (51) for supporting stored objects (A); an anti-tip safety device (60) which is provided in a lower part of the rack frame (1) and which can move forwards and backwards; a clutch link mechanism (70) for advancing and reversing the safety device <Desc / Clms Page number 39>  anti-tip (60) in a functional relationship with the advancement and retreat of any of the movable shelves (40).  10. Shelving according to claim 9, characterized in that, when any of the mobile shelves (40) is advanced or moved back while being extended or retracted, the other mobile shelves are locked in their retracted position and moved back by means lock (95).  11. Shelving according to claim 9 or 10, characterized in that the clutch connecting mechanism (70) comprises a vertical connecting member (71) which is guided on the frame (1) of the shelving and which is movable towards the forward and backward, the connecting member (71) having a lower part connected to the anti-tip safety device (60) and being capable of abutting backwards against a stop element (58) provided on each mobile shelf (40), and in that a coupling device (80) for gradually extending or retracting the mobile shelf is positioned between the rack frame (1) and the clutch link mechanism (70) .  12. Shelving according to claim 11, characterized in that the coupling device (80) comprises a shaft (81) disposed at a specified location of the connecting member (71), two plates forming front and rear cams (82 , 85) mounted separately on the shaft (81) so that they can slide up and down, latches (82a, 85a) formed on opposite sides of each cam plate, cam rollers (84,87) mounted on the cam plates, a biasing member (88) for biassing the cam plates <Desc / Clms Page number 40>  pivotable in directions causing the cam rollers (84,87) to approach each other, and a guide member (90) for guiding the cam rollers, the guide member (90) comprising a horizontal cam limiting face (90a) formed in its front-rear direction, in that the cam rollers (84,87) are guided by the cam limiting face (90a) to pivot the cam plates (82,85) against the biasing force of the biasing member (88), in order to cause the latches (82a, 85a) to be positioned in front of and behind a locking finger (57) provided on the side of the movable shelf (40), and in that, when one of the cam rollers is uncoupled from a front or rear end of the cam limiting face (90a), one of the cam plates is brought to pivot by the biasing force of the biasing member (88), which forces its latch to leave the front or the rear of the bl finger ocage (57).  13. Shelving according to claim 12, characterized in that each shelf (40) is provided with locking means (95) intended to lock a movable shelf (40) retracted in its retracted position, the locking means (95) comprising a anti-lifting safety device (97) comprising, formed thereon, a down-facing anti-lifting surface (97a) and a locking member (99) arranged to be able to pivot vertically at a front end of the anti-lifting safety device (97 ), the locking member (99) adopting an inclined position in which its lower end moves back when it has pivoted in its extreme lower position, so that the locking finger (57) provided on the side of the shelf <Desc / Clms Page number 41>  movable (40) and a shaft (81) of the coupling device (80) abut against a front surface of the locking member (99) and act on it, and that the locking finger (57) comes abut against a rear surface of the locking member (99) and act on it.