Abstract: In a sorter for sorting sheets fed from a sequential source of sheets, with a closely vertically spaced array of sorter bins, and apparatus to vertically move the array of sorter bins relative to the source of sheets for sequentially loading individual sheets into individual sorter bins, the improvement including partially horizontally displacing one individual sorter bin at a time from the superposed array, in coordination with the vertical movement, towards the source of sheets to provide an enlarged bin entry opening without requiring any change in the vertical spacing between the bins, and subsequently horizontally moving a bin so displaced back into vertically superposed alignment with the other bins of the array. Also disclosed is stapling sheets sorted into the bins, wherein the same system for partially horizontally displacing the sorter bins also functions to move one displaced bin at a time into the stapler for stapling the sheets sorted in that bin without removal therefrom.

Abstract: A sheet sorting machine of the shifting tray type has a plurality of trays mounted for shifting movement past a sheet infeed location during sorting operation. The trays are pivoted to widely spaced relation at the entry location and are also cammed open by tray ends at distal ends of the trays in response to the pivotal motion. A tray support is moved with the trays to maintain uniform tray angle.

Abstract: A sorter in which a stepwise bin driving mechanism which includes helical cams moves bins, which are arranged in multiple steps, sequentially and intermittently to a sheet delivery position for loading the respective bins with sheets. The sorter includes pin guides and support frames which are constituted by side plates each being provided with an elongate slot for guiding a pin, which is provided on each side of the base end of a bottom plate of each bin. Cam members are provided at both sides of the other or free end of each bin. The cam members of the lowermost one of the bins have a greater height than those of the other bins so that, while the sorter is in a sort mode, the space available above the bottom plate of the lowermost bin for receiving sheets becomes greater than those available above the other bins. A bin drive motor which serves as a drive source for the bin driving mehanism is implemented with an AC reversible motor.

Abstract: A sorter comprising a plurality of vertically arranged bin trays. The bin trays have widthwise projecting trunnions at least in one side thereof. The trunnions are stacked vertically and can move in the stacking direction along a predetermined moving passage. The sorter further comprises a transfer mechanism for elevating and lowering the trunnions successively one by one along the predetermined transfer passage and successively spacing adjacent bin trays vertically at their sheet receiving ends to form a sheet receiving opening. The transfer mechanism has a pair of cooperating rotating cam plates. Each of the rotating cam plates has at least one trunnion receiving groove extending radially and being opened at its radial outside end and an outer circumferential cam surface continuously extending circumferentially excepting the site of the trunnion receiving groove. The outer circumferential cam surface is a convoluted surface whose radius progressively increases in a predetermined rotating direction.

Abstract: Multiple copies of sheets produced by a copying machine or the like are sorted onto trays. The trays are arranged in a stack and are moved upwardly and downwardly to enable different sheets to be sorted onto the trays on each upward pass and downward pass of the stack. The trays have pairs of pins extending outwardly from opposite side edges into a pair of slots on upright support plates. The walls of these slots support each tray as a cantilever. One of the slots, which is closest the rear edge of the trays, is preferably larger than the other and enables any adjacent trays to be spread apart by lifting and tilting one of the trays so as to provide access between the separated trays for jam clearance and the like. A shifting mechanism moves the trays across a gap into which sheets are dispensed from the copier onto the tray at the underside of the gap. This lifting mechanism is a rotatable assembly which engages the pins and moves a tray across the gap.

Abstract: A sorter comprising a plurality of vertically arranged movable bin trays and a transfer mechanism for elevating and lowering the bin trays successively. Follower projecting portions, projecting in a predetermined direction, are provided respectively on the bin tray. The projecting lengths of the projecting portions increase stepwise from the bottom to the top of the bin tray arrangement.

Abstract: A sheet sorting device having a plurality of bin trays has a resilient member for imparting to a bin tray support member a force in the direction opposite to the direction of gravity and reducing a load applied to a bin tray drive source. A detecting device for stopping the driving of the drive source detects the movement of the drive source when the drive source moves up or down relative to the bin trays. A cam member has two lead portions, smooths the movement of the bin group and makes the amount of opening between the bins always constant.

Abstract: A random access sheet receiver is provided with a stack of trays having ends vertically shiftably mounted in a frame structure and forming bins to receive sheets from a copier, printer, or the like, wherein said ends of the trays are normally closely spaced and rest one on the other. A sheet infeed is pivotally mounted in the frame structure to receive sheets exiting from the copier, printer, or the like, the infeed being associated with a bin opening mechanism which raises and lowers the infeed and has a lifter to pivotally open and hold open said ends of the trays during transport of a sheet to a selected bin. The other ends of the trays are supported on cams which increase the space at the other ends of the bins in response to pivotal opening of the trays by the bin opener.

Abstract: A recorded sheet is turned from a face-up condition to a face-down condition by horizontal transport belts, a first guide member, vertical transport belts, and a second guide member. The recorded sheet is guided to a discharge device, and discharged to a tray by the discharge device. During a sorting action, the discharge device is transferred by a transfer device to the tray to which a sheet is to be discharged. In response to this transfer, a hold member is extended or shortened in a vertical direction and holds a sheet being transported between the hold member and the vertical transport belts in such a manner as to avoid interference with its transport, so that the sheet can be prevented from falling by gravity.

Abstract: An extremely compact sorting apparatus includes a plurality of trays, each tray having a pin on each side of an entry portion side where a recorded sheet is received. The tray pins are guided by a vertical guide groove disposed on a frame so as to form a tray entry portion, as cam wheels with slots shift trays one level upwardly or downwardly. A transport plate for guiding a recorded sheet pivotally supports a discharge roller shaft and a cam wheel shaft coaxially. Furthermore, a motor for driving the discharge rollers and a motor for driving the cam wheels are mounted on the transport plate to provide a transport unit. When a recorded sheet is inserted onto the transport plate, it is detected by a detector, so that the drive of the discharge rollers begins and the recorded sheet is discharged to the tray entry portion. When this discharge is completed, the drive of the cam wheels begins so that the trays are shifted by one level.

Abstract: An apparatus for reading out a radiation image stored on a stimulable phosphor sheet comprises a read-out section, a monitor for reproducing a visible radiation image, an erasing section, and a section for releasably holding a magazine housing stimulable phosphor sheets. The apparatus also comprises a first conveyance system for conveying the stimulable phosphor sheets fed out of the magazine to the read-out section, a stacker disposed at the first conveyance system between the magazine holding section and the read-out section, for housing the stimulable phosphor sheets and transferring them one by one to the first conveyance system. A second conveyance system conveys the stimulable phosphor sheets passing through the read-out section to the erasing section, and a third conveyance system returns the stimulable phosphor sheets passing through the read-out section to the stacker.

Abstract: A compact sheet stacker or sorter for a xerographic or other copier has respectively one or more upright sheet-receiving bins which are fed from below by a guide assembly which, in the case of a sorter, can be indexed from bin to bin but, in the case of a stacker is fixed. With this arrangement sheets are collected inproperly collated (1-N) order without using an active sheet inverter or conventional inverting paper path, thereby saving space. Bin plates defining the bins are shaped so as to hold sheets in a curved configuration transverse to the direction of sheet feed. The curvature imparts beam strength to the sheets enabling them to stand on edge even when the sheets extend above the tops of the bins. A stacker or sorter with relatively short bins can therefore handle a variety of sheet sizes without adjustment.

Abstract: A tray assembly for a sorting machine having a pair of tray pins disposed on both edges of a sheet entry side tray, a supporting member disposed at each tray end of a plurality of trays for forming a gap between each two trays of the plurality of trays in a stacked condition, and a hook for increasing the gap between tray ends in response to a movement of one of the trays while a tray entry forming member forms a tray entry successively each time that a sheet is fed to the tray assembly. A compact tray assembly can accommodate increased storage volume of sheets with reduced noise and jamming.

Abstract: An apparatus for reading out a radiation image stored on a stimulable phosphor sheet comprises a read-out section, an erasing section, and a section for releasably holding a cassette housing the stimulable phosphor sheet. The apparatus also comprises a sorter section for holding erased stimulable phosphor sheets and ejecting them one by one therefrom, a first conveyance system for receiving the stimulable phosphor sheet from the cassette holding section and conveying it to the read-out section, the erasing section and then to the sorter section, and a second conveyance system for conveying the stimulable phosphor sheet from the sorter section into the cassette.

Abstract: A sorter for collating sheets into sets comprises a plurality of sheet-receiving bins defined by an array of movable plates and an indexing wheel for indexing the input ends of the bin plates sequentially past a fixed feed throat to align the bin openings in turn with the feed throat. Adjacent bin plates are relatively movable apart and together for varying the sizes of the bin openings and are interconnected to limit their maximum spacing. The bin plates are spaced apart opposite and at one side of the feed throat and arranged together on the other side of feed throat. The indexing wheel engages the bin plates sequentially and the bin plates are biassed away from the indexing wheel in one direction and their interconnection permits engagement thereof by the indexing wheel in opposition to the bias. The indexing wheel suitably has a discontinuous annular flange.

Abstract: This invention relates to a sorter for sequentially moving a plurality of vertically stacked storage sections to a sheet reception position by a moving mechanism which is pivoted upon reception of a rotational force from a drive, and for automatically sorting sheets discharged from an image forming apparatus into the storage sections. The moving mechanism is constituted by a link body, pivotal movement of the link member allows widening of a distance betwen two adjacent storage sections, and the plurality of storage sections connected by the corresponding regulating members can be moved to the sheet reception position, thereby making the sorter compact and achieving appropriate sorting without causing jam or the like.

Abstract: A sheet sorting apparatus of the type in which a stack of trays are integrally moved by a driving device so that individual trays are sequentially brought into association with a sheet discharger to receive the sheets. A sheet passage is branched out of the passage for receiving the sheet from the sheet discharger to the trays so that two passages are usable for supplying the sheet to the trays. One of the two sheet passages is selected in response to the selection of the mode from the sorting mode and non-sorting mode.

Abstract: A sheet sorter of the nesting-bin type includes translatable bins that are driven so that there is an additional space between the bin immediately on top of a sheet-entry location and any superposed bins. This provides access to a corner of a set of sheets registered in that bin for a stapler which is reciprocable between a remote position permitting free indexing of the bins and an inner position in which it can be operated to staple the respective set of sheets together.

Abstract: An apparatus in which sheets are sorted in selected ones of a plurality of movable trays shiftable relative to one another. One edge of the trays is supported with the remaining edges thereof being unsupported. Successive trays move from one side of a sheet inlet region to the other side thereof with the trays shifting relative to one another to provide wide entry regions at the sheet inlet region and at a sheet securing region.

Abstract: A sorting apparatus arranged to receive a stream of sheets for collating the same into booklets having a rotary sorter comprised of a plurality of bins each of which includes a sheet clamping device to hold sheets in registered orientation in the bins. Control means cooperate with the clamping means to release the sheets at a loading station to permit egress of the sheets one at a time into the bins as the sorter rotates, and to release the clamping devices at an unloading station to permit removal of the completed booklets.

Abstract: A sorting apparatus includes a plurality of trays, each having a pair of tray pins on the both sides of the sheet inlet of the tray and being held in a stacked condition; tray inlet holding members interposed between the tray pins of the vertically adjacent trays to define an inlet for a sheet and being vertically movable and rotatable; member which, upon rotation of the tray inlet holding member, moves the tray pins which are in contact with the holding members vertically while the holding member moves in the opposite vertical dirction, thereby shifting the sheet inlet defined between the tray pins; and supporting members disposed not to interfere with the vertical movement of the holding member and made into contact with the respective pairs of the tray pins in such a manner that the supporting members bear the bearing load produced from each tray and permit the tray pins to override the supporting members when the bearing load is greater than a predetermined value.

Abstract: A sheet sorter including: a sheet feed passage having an outlet for feeding sheets one by one and a plurality of bin trays situated adjacent to the outlet for receiving sheets fed from the passage. Each said bin tray has a pair of training pins projecting outward from respective sides of an inlet end. These training pins are vertically guided so that the bin trays are held and stacked in a pile. A pair of Geneva cam wheels are used to shift the bin trays, successively, and simultaneously shift the outlet of the passage. The sheet feed passage is defined between upper and lower units accommodated in a sorter case. The upper unit is raised by opening a cover of the sorter case so that the sheet feed passage is opened and accessible for removing sheets jammed therein.

Abstract: A sorting apparatus of a spiral cam type for sorting or collating copy paper sheets discharged from a copying machine and the like, having a spiral groove of each spiral cam formed in an amount equivalent to the sum of the distance between bins in an expanded condition for receiving copy paper sheet and the distance between the bins in a non-expanded condition to eliminate vertical movements of the bins not directly related to the sorting or collating during expansion of the space between the bins.

Abstract: A sorting apparatus of a shiftable bin type for use in a copying apparatus or the like, which is arranged to be capable of readily and positively removing sorted copy paper sheets from respective bins.

Abstract: A sheet sorter including: a sheet feed passage having an outlet for feeding sheets one by one in a predetermined direction, and a plurality of bin trays situated adjacent to the outlet and stacked in a pile with gaps between the adjacent bin trays for receiving sheets fed from the passage. The gaps are widened, successively, at an inlet side of the bin trays. The passage is shifted up and down in synchronization with the widened gap so as to align the outlet of passage with the widened gap. A plurality of feed rollers are fixedly mounted on a shaft provided in the outlet for feeding the sheets into the widened gap. Swing plates are rotatably or swingably mounted on the shaft to direct the sheets onto the bin trays.

Abstract: Apparatus for sorting sheets wherein the individual bins in the sorter are supported in the frame member in cantilevered fashion about only one edge and are open and unsupported in any other position. Each bin has plural means to movably support the bin in the frame comprising at least two support members slidingly engagable with the frame and sufficiently vertically spaced apart to prevent equilibrium when a coefficient of friction between the support means and the frame is at least 0.3 and a friction force between the support means and the frame is less than the weight of the bin, and further including a C-cam to sequentially vertically move said bins in the frame past a sheet entrance position.

Abstract: A sheet sorting apparatus, used with an image printing apparatus, having a plurality of shiftable trays arranged in a vertical array; a pair of vertically movable cams for shifting the trays and for forming sheet discharge zone; a sheet feeding mechanism; and sheet edge guides, which are vertically movable integrally with the cams, for aligning the sheets deposited on the trays. The sheet feeding mechanism includes a sheet inlet unit, the level thereof is adjustable to meet the sheet discharge level of the image printing apparatus, and a tiltable sheet conveyor which bridges the sheet inlet unit and the sheet discharge zone.

Abstract: A sorting apparatus which has a nest of a plurality of sheet receiving bins supported on a sorting support frame, each bin with a sheet output end and a sheet input end, the plurality of bins being pivotally mounted at their output end about the same pivot point on the support frame such that the output end of each bin is at a level higher than its input end so that the bins slope upwardly for uphill stacking of sheets as they are inserted. The bins are spaced relatively close together at the input end and relatively far apart at the output end. The apparatus is also provided with a rotary shifting member to sequentially pivot the bins about their pivoting mount to index the bins past the fixed feed throat for sheet insertion and as the bins are indexed past the fixed feed throat the rotary shifting member widely spaces adjacent bins to provide sheet entry for successive bins when positioned opposite the feed throat while the input ends of the bins are nested close together on either side of the sheet entry.

Abstract: An electrophotographic copying machine includes a photosensitive drum on which an electrostatic latent image is formed, a developing apparatus for developing the electrostatic latent image into a toner image, a transferring apparatus for transferring the toner image to a copy paper supplied from a paper supplying portion, a fixing apparatus for heating the copy paper having the toner image transferred thereto to fix the toner image, and a paper ejecting roller for ejecting the copy paper having the toner image fixed thereto to the exterior of the machine body. The copying machine elements are arranged so that the copy paper transporting path from the paper supplying portion to the paper ejecting portion is divided into two assembly units, the assembly units which can be removed from respective predetermined attached positions toward the exterior of the copying machine body in a direction opposite from each other and parallel to the transporting direction of the copy paper.

Abstract: Disclosed is a sorter which has a controller for receiving a reset signal generated by a copying machine main body and for positioning sort bins in a sort home position in response to the reset signal.

Abstract: In the present invention, a sheet-sorter, operating in conjunction with a photocopy machine, has a plurality of trays in general horizontal alignment with the path taken by a sheet of paper discharged from the copier. A tray pusher is arranged to move the lower-most tray in a stack of trays disposed above the paper-path so that the in-board end of the lower-most tray will drop some distance below the paper path, after the sheet has been discharged from the copier. The tray-pusher may be activated by movement of the copier carriage or by an appropriate gear-train connection to a pair of juxtaposed rolls, slightly spaced from each other, constructed and arranged so that one roll will cause the other roll to rotate only when a sheet of paper is disposed between the rolls as the sheet is discharged from the copier. The stack of trays may be re-set manually or by the movement of the copier carriage.

Abstract: An improvement in the mechanism for separating sheet-receiving trays of a sorter for photocopy machines, which increases the capacity of the sorter. A plurality of drive cams each sliding up and down on its own drive shaft, and each having a helical slot on its outer surface, rotate as the shafts are rotated. Trunions extending from the trays engage the helical grooves in the cams, and they, along with the tray to which they are connected, move up or down as the cams rotate. The sorter has improved capacity while yet permitting access between trays. It is simple and positive in operation and provides sorting action in both the upward and downward movement of the cams on the driveshafts.

Abstract: A sheet sorting machine of the movable bin type has a frame structure which supports a plurality of bins at one end of the bins, adjacent to a sheet entry location, the other ends of the bins being free and spaced for removal of sorted sets of sheets. The bins have pairs of trunnions at opposite sides engageable with one another and by pairs of bins shifting spiral cams to raise and lower the bins in parallelism. The trunnions for the bins and the spiral cams are mounted in spring loaded housing with springs which bias the trunnions into the spiral cams, and a trunnion is always in the cam track of the spiral cams.

Abstract: An apparatus is disclosed for receiving sheets from the discharge portion of an electrostatic copy machine, which apparatus receives, stacks and collates the sheets as desired. The apparatus can be electrically independent of the copier and is attached thereto by simple hanger and bracket arrangements. The apparatus includes a plurality of trays which are moved past the discharge opening of the copier, and which are controlled and arranged, selectively to receive (1) a plurality of sheets in each tray; (2) a single copy of each sheet in each of several trays; or (3) a number of identical sheets in one tray and a differing number of other sheets in successive trays. The apparatus can collect, collate, and sort the sheets while the trays are moving in one direction past the copier discharge opening, as well as when the trays are moving past it in the other direction.

Abstract: Methods and apparatus for stacking sheets of various intermixed lengths in a stacking location employ distinct first and second sheet drive rollers at a sheet feed path adjacent said stacking location. The first sheet drive rollers are rotated in a first sense of rotation for driving each sheet along the sheet feed path in a first direction. The second sheet drive rollers are for each of the sheets maintained out of the sheet feed path while the particular sheet is driven with the first sheet drive roller means in the first direction past a stacking position at the stacking location. The second sheet drive rollers are rotated in a second sense of rotation for driving each sheet in a second direction opposed to said first direction. The second sheet drive rollers are for each sheet driven past the stacking location introduced into the sheet feed path for driving the particular sheet in said second direction into the stacking location.

Abstract: Multiple copies of sheets produced by a duplicator, xerographic copier or the like are sorted onto trays. The trays are arranged in a stack and are moved upwardly and downwardly to enable different sheets to be sorted onto the trays on each upward pass and downward pass of the stack. A carriage retains the stack and moves upwardly and downwardly with the stack as individual trays are engaged and translated around a region where adjacent trays are spread apart to register the trays successively at a position where individual sheets are received thereon. Bidirectional movement of the entire stack of trays with a mechanism which raises or lowers a single tray provides a sorter of compact size which is simple, reliable and low in cost and which operates without generating excessive noise.

Abstract: A sheet sorter which has a plurality of sheet receiving bins which comprises an array of movable plates such that adjacent plates define an individual bin, is provided with a quadrant plate for indexing the input ends of the bin plates past a fixed feed throat to align the bin opening in line with the feed throat for sheet insertion. Adjacent bin plates are interconnected to limit their maximum spacing apart, and are movable apart and together for varying the size of the bin openings. The bin plates are spaced apart opposite and at one side of the feed throat and are spaced together when indexed past the feed throat to the other side of the feed throat. Preferably the bin plates are arrayed in a vertically oriented fan-like array and the quadrant plate is rotatable about an axis.

Abstract: A sorting machine has bins which are shifted sequentially past a sheet entry location between positions at opposite sides of the sheet entry location, to provide a relatively wide sheet receiving space between adjacent bins at the entry location. The bins have their outer ends pivotally mounted in a frame structure spaced from the sheet entry location, so that the bins slope forwardly. Shifting of the bins is accomplished by a reversible motor driven rotor located at one side of the bins and having recesses to receive trunnions at one side of the bins on each one-half revolution to shift a bin in one direction or the other. The other side of the bin group is unobstructed.

Abstract: A sorting machine is provided to receive successive sheets from an outlet from a copying machine. The sorting machine has plural trays mounted to move progressively past the sheet outlet in opposite directions, the trays being relatively close together when positioned at either side of the outlet, but adjacent trays being widely spaced to accommodate the incoming sheets from the outlet. The trays are fed past and spaced at the outlet by driven members at opposite sides of the tray which engage and shift stacked tray supports in succession.

Abstract: A sorting machine is provided to receive successive sheets from an outlet from a copying machine. The sorting machine has plural trays mounted so that the inlet ends of the trays move progressively past the sheet outlet in opposite directions, the inlet ends of the trays being relatively close together when positioned at either side of the outlet, but the inlet ends of adjacent trays being widely spaced to accommodate the incoming sheets from the outlet of the copier. The trays are fed past and spaced at the outlet by driven members at opposite sides of the tray which engage and shift stacked tray supports in succession. The other ends of the trays are supported for relative angular and longitudinal sliding movements on a vertically shiftable support timed with the feed of the inlet ends to minimize tray angle.

Abstract: A sorting machine is provided for attachment to a copying machine to receive successive sheets from an outlet from the copying machine. The sorting machine has plural trays mounted to move progressively past the sheet outlet in opposite directions, the trays being relatively close together when positioned at either side of the outlet, but adjacent trays being widely spaced to accommodate the incoming sheets from the outlet. The trays are fed past and spaced at the outlet by driven members at opposite sides of the tray which engage and shift stacked trays in succession. The driver members are notched discs functioning as a linear Geneva movement. The remote ends of the trays are freely supported one on the other for relative longitudinal and pivotal movement. In certain forms, the remote tray ends are mounted one on the other by end pieces which have wedge surfaces causing the remote ends to be spaced apart responsive to longitudinal movement of the trays.

Abstract: A sorting machine is provided for attachment to a copying machine to receive successive sheets from an outlet from the copying machine. The sorting machine has plural trays mounted to move progressively past the sheet outlet in opposite directions, the trays being relatively close together when positioned at either side of the outlet, but adjacent trays being widely spaced to accommodate the incoming sheets from the outlet. The trays are fed past and spaced at the outlet by driven members at opposite sides of the tray which engage and shift stacked trays in succession. The driven members are notched discs functioning as a linear Geneva movement. The remote ends of the trays are freely supported one on the other for relative longitudinal and pivotal movement.

Abstract: Apparatus for collating, stacking or otherwise sorting successive sheets of paper delivered from the output station of a sheet-delivering device, for example, from a photocopier. A compact stack of a selected number of sheet-receiving trays is lifted above the output station and the trays are caused to drop one at a time to a position below the output station such that each can receive one or more sheets from the output station. In a preferred embodiment, the trays are mounted to move between the top and bottom of a vertically movable frame in which the trays are lifted to form an upper stack from which they are successively dropped to form a lower compact stack with an intervening space into which the sheets are delivered to be deposited on the uppermost tray of the lower stack.

Abstract: An apparatus in which a sheet advancing along a pre-determined path is collected in one of a plurality of movable sheet receiving stations. One of the receiving stations is aligned with the sheet path. A guide moves from an inoperative position spaced from the receiving stations to an operative position coupling the aligned sheet receiving station with the sheet path. This enables the sheet to advance into the receiving station.

Abstract: A sorting apparatus in which a sheet loading station is arranged to advance sheets into individual sheet receiving members of one of at least two groups of sheet receiving members. The other group of sheet receiving members is positioned at one of two sheet unloading stations. After loading and unloading sheets from the respective groups of sheet receiving members, the loaded group of sheet receiving members moves to the other sheet unloading station as the unloaded group of sheet receiving members returns to the sheet loading station.

Abstract: A sheet sorter device comprises a feeder for introducing sheets to be sorted, a conveyor for conveying the sheets from the feeder to a sheet receiving portion, a plurality of bin trays for receiving therein the sheets upwardly inclined in the direction of movement of the sheets when received, a guide for supporting and guiding the bin trays, and a bin tray displacing device capable of selectively effecting the displacement of at least one of the bin trays to a sheet receiving position by widening the entrance thereof and the holding at a predetermined position of a bin tray to be subsequently displaced.