VENDING MACHINE

Abstract: An elevator (21) extends vertically from a lower region having a serpentine rack (31) (for small items) to an upper region housing conveyor racks (22) for larger items. Items from the serpentine rack are conveyable to the elevator by a carrying means, e.g. a conveyor which displaces bars (45) to push items along a guide surface (46). Thus the elevator can convey all items to a single outlet (14). The elevator bucket (24) has means (242,243) for centering merchandise on the bucket (24).

Description: This invention relates to a vending machine, and particularly to a vending machine which has only one takeout portion for taking merchandise from a conveyor rack and a serpentine rack. A known vending machine is shown in Fig. 1 of the accompanying drawings, and is disclosed in the Japanese Utility Model laid open in Gazette number 52/14579. This vending machine 1 has a first merchandise carrying mechanism 6 including a plurality of conveyor racks 2 and an elevator: and a second merchandise carrying mechanism 9 which includes a serpentine rack 7. Merchandise disposed on a conveyor rack 2 is conveyed thereby to the bucket 4 of the elevator 3, and then carried by the elevator 3 to the takeout portion 5. Likewise, merchandise in the serpentine rack 7 which is beneath the conveyor racks 2 is carried to a respective takeout portion 8. With such a construction, conveyor mechanisms 6 and 9 operate independently to carry merchandise. Thus the door members which provide the takeout portions 5, 8 are complicated. In addition since a user cannot easily tell at which takeout portion merchandise will appear, this is a further inconvenience. Thus, it is desirable to provide a vending machine in which it is easier for a user to obtain merchandise. It is desirable to have a vending machine with only one takeout portion. According to the present invention, there is provided a vending machine having a first merchandise carrying mechanism comprising one or more conveyor racks; an elevator extending vertically and having a carrying bucket for carrying merchandise from a said conveyor to a takeout portion; and a second merchandise carrying mechanism comprising a serpentine rack disposed generally beneath at least one conveyor rack of the first carrying mechanism; characterised in that there is a carrying means disposed under the serpentine rack for receiving merchandise from it and carrying said merchandise to the elevator bucket whereby merchandise from both carrying mechanisms is dispensable through the same takeout portion. An embodiment of the invention will now be described in greater detail with reference to the accompanying drawings in which: Fig. 1 is a schematic view showing the interior of a prior art vending machine: Fig. 2 is a perspective view showing the interior of a vending machine Fig. 3 is an enlarged perspective view of a bucket as shown in Fig. 2; Fig. 4 is a side view showing a second merchandise carrying mechanism and a conveyor as shown in Fig. 2; Fig. 5 is a perspective view on a larger scale showing part of a conveyor carrying mechanism as shown in Fig. 2; Fig. 6 is a cross section showing operation of a conveyor carrying mechanism as shown in Fig. 2; and Figs. 7 and 8 are schematic views showing the carrying of merchandise without means to ensure it sits stably in a bucket. One embodiment of a vending machine according to the invention will now be described with reference to Figs. 2-7. Thus, a vending machine 10 has a cabinet 101 in the lower end of which there is a condensing unit space 11. The cabinet is closed at the front by a heat insulating door 12 which closes the main upper part of the cabinet, and an outer door 13 which overlaps the insulating door 12 and extends beneath it to close the condensing unit space 11. An opening for a merchandise takeout portion 14 extends through the insulating door 12 and the outer door 13 near the middle of the outer door. A first merchandise carrying mechanism 20, primarily for relatively large items, comprises a conveyor and an elevator. A second merchandise carrying mechanism 30, primarily for relatively small items, comprises a serpentine type carrier, associated with a conveyor carrier 40 for carrying merchandise thence to the elevator 21. The elevator 21 extends vertically in the centre of the cabinet 101. A plurality of conveyor racks 22 are serially disposed on each side of the elevator 21. The elevator 21 has a bucket 24 connected to an endless chain 23 which is rotatable in one direction by a motor 25 so as to displace the bucket. The position of the bucket 24 is constantly monitored by sensors (not shown) and can be stopped at a position corresponding to a desired conveyor rack 22 or the merchandise takeout portion 14, in order that merchandise can be carried from a conveyor rack 22 to the takeout portion 14. Bucket 24 is generally U-shaped, as shown in Fig. 3. Thus it has a lower plate 241, a spaced upper place 246, and a side plate 248 connecting them. A pair of position determining members 242, which are generally cuboidal are attached at the rear of the lower plate 241 so as to urge merchandise to adopt a central position. Guide member 243 has an inclined upper surface and is provided near the front of the lower plate 241 to guide merchandise smoothly. Connecting rods 244 are connected to the endless chain 23 and attached to the bottom end surface of the lower plate 241 of the bucket 24. Guide rollers 245 are each connected to one end of a connecting rod 244 and retained within the guide rail 17, to guide vertical movement of the bucket along the rail 17. A plurality of holes 247 in the upper and lower plates 246,241 and in the position determining members 242, the guide member 243 and the connecting rods 244 are in register so that light from a sensor device 15, (see Fig. 2) can be transmitted to a light detector 16 so that it is possible to detect whether merchandise A is located on the bucket. The second merchandise carrying mechanism 30 is disposed under the conveyor racks 22. It includes a plurality of sepentine racks 31. Each rack 31 has a serpentine shape as shown in Fig. 4, and has an inlet opening 32 at an upper end, and an outlet opening 33 at its lower end. A merchandise carrying control mechanism 34 includes a first stopping means 341 and a second stopping means 342. It is mounted at the outer opening 33. The second stopping means 342 has an upper end portion which can project upwardly to prevent a second item of merchandise a2 from descending from the serpentine rack 31. Thereafter, the first stopping means 341, which initially also projects upwardly to obstruct passage of merchandise, retracts in order to allow the leading item of merchandise a1 to drop onto the bucket 24. The first stopping means 341 then moves up again to obstruct passage, and the second stopping means 343 is moved down so that the next item of merchandise a2 can move past the location of the second stopping means 342 , but is stopped by the first stopping means 341. This sequence is repeated whenever merchandise is displaced, so that merchandise can be dropped into the bucket 24, one item at a time. Fig. 5 shows a conveyor carrying mechanism 40, which is disposed under the outer opening 33 of the serpentine rack 31, as can be seen from Figs. 2 and 4. It includes a pair of sprockets 42, a shaft 41 on which they are mounted, and chains 43 engaged over respective sprockets. A merchandise receiving plate 44 for receiving merchandise from the serpentine rack 31 has longditudinally extending guide rails 46. It is mounted between the chains 43. A plurality of shafts 45 extend between the chains 43 at regular intervals, being connected to them so that they can be displaced above the surface of the guide rails 46, at regular intervals, to move merchandise on the plate 44 towards the bucket 24. As shown in Fig. 4, there are guide plates 47 at both ends of the chains 43 to cover them, and to prevent merchandise from dropping from the plate 44. A stopper plate 48 is disposed at the opposite side of the outer opening 33 on the serpentine rack 31 to prevent merchandise which is dropped from the outer opening 33 from falling out onto the receiving plate 44. The operating of the vending machine is as follows. If merchandise on a conveyor rack 22 is selected by a user by means of a merchandise selection switch, the bucket 24 moves to the position adjacent a conveyor rack 22 corresponding to desired merchandise A. (The bucket is conveyed there by means of the motor 25.) The conveyor rack 22 carries merchandise A to the bucket 24. The merchandise A then rolls into the bucket 24 and is accommodated at the centre, guided there by the position control members 242 as shown in Fig. 3, thus reducing the risk of merchandise breaking. If there is no position control mechanism 242 the situation may be as shown in Fig. 7, where a part of the item of merchandise A extends outside the bucket 24. Thus the merchandise will collide with the conveyor rack 22 when the bucket 24 is moved. When merchandise A in a serpentine rack 31 is elected by a user, the bucket 24 moves down to the position of the lowest conveyor rack 22. The merchandise control mechanism 34 of opening 33 operates to displace merchandise A to the conveyor carrying mechanism 40. An item of merchandise A drops onto the receiving plate 44 and is moved to the bucket 24 by means of the moving shaft 45. Merchandise A slides on the inclined surface of the guide member 243 and then is guided onto the bucket 24 as shown in Fig. 6. If there were not a guide member 243, the item might fall when moved onto the bucket, as shown in Fig. 8.

Claims: A vending machine (10) having a first merchandise carrying mechanism (20) comprising one or more conveyor racks (22); an elevator (21) extending vertically and having a carrying bucket (24) for carrying merchandise from a said conveyor to a takeout portion (14); and a second merchandise carrying mechanism (30) comprising a serpentine rack (31) disposed generally beneath at least one conveyor rack (22) of the first carrying mechanism; characterised in that there is a carrying means (40) disposed under the serpentine rack (31) for receiving merchandise from it and carrying said merchandise to the elevator bucket (24) whereby merchandise from both carrying mechanisms (20,30) is dispensable through the same takeout portion (14). A vending machine according to Claim 1 wherein said carrying means (40) is a conveyor having endless chains (43) connected by shafts (45) for pushing merchandise along a guide surface (46). A vending machine according to claim 1 or claim 2 wherein the bucket (24) has means (242,243) for centering merchandise on the bucket (24). A vending machine according to claim 3 wherein bucket (24) includes a lower support plate (241) and said centering means comprises a pair of laterally spaced cuboidal blocks (242) provided on said plate (241) at the rear thereof so as to urge merchandise to adopt a central position with respect to lateral displacement; and a guide member (243) provided on the plate (241) at one side near the front thereof, said guide member (243) having an inclined upper surface sloping downwardly away from the side of the plate so as to guide merchandise smoothly towards a said central position. A vending machine according to any preceding claim having a single merchandise takeout portion (14) to which merchandise is feedable by the elevator (21).

Inventors: KANBE, TORU, SATO, KATSUNOBU, TAGUCHI, MASAYUKI
Applicants: SANDEN CORPORATION
Application year: 1989
Main classification: G07F11
IPC codes: G07F11