Bottle packer for in line cases

Abstract: Articles (A), such as small plastic bottles, or six packs consisting of such bottles, are moved by line pressure down an inclined ramp (34) into a load station (40) where plastic trays (C′) are continuously filled with these articles. The trays are indexed by a flight bar conveyor (50) that raises each tray, to be in position to index the next tray, and driven separator discs (60) above the articles have lugs (62) that move between selected article rows to index groups of the articles as they are loaded into the tray.

Description: This invention relates generally to packers for loading plastic and/or glass bottles into upwardly open cases or trays which are adapted to receive two or more side-by-side columns of bottles in aligned rows. Line pressure from a conveyor moves the bottles across a ramp. Support for the bottles at the load station may be provided by neck ring guides, or by virtue of the fact that the bottles are prepackaged in cartons or six packs or by other suitable means. The trays or cases move upwardly from below the path of the article columns into the load station where each tray is elevated slightly at its rear or aft end by a flight bar conveyor system that is used to synchronize the trays with an overrunning series of parallel collating wheels that are provided with protuberances for downward movement between adjacent columns of articles to form individual groups of articles for deposit in each of the generally rectangular cases or trays. BACKGROUND OF THE INVENTION Continuous motion packers of the type adapted to handle relatively large plastic soda bottles in two columns are currently available. See for example the apparatus disclosed in U. S. Patent No. 4,9⊘1,5⊘1 and assigned to the assignee herein. The usefulness of such an apparatus for packing plastic bottles in two or more columns or lanes poses problems for such a packer, and typically, trays for transporting smaller bottles do not have pockets uniformly spaced with respect to one another as do the trays for handling large plastic bottles. Patent No. 5,020,306 entitled CONTINUOUS MOTION PACKER FOR FEEDING CONTAINERS IN END-TO-END PACKING CASES and also assigned to the assignee herein teaches that an apparatus can be provided for handling two side-by-side columns of containers or bottles even where the pockets in which the bottles are to be deposited are not equally spaced in the longitudinal direction. However, as in the apparatus of Patent No. 4,901,501 only two side-by-side columns or lanes of plastic soda bottles can be accommodated. US-A-2 699 278 discloses an apparatus according to the preamble of claim 1. The general purpose of the present invention is to provide a packer capable of handling two or more columns of bottles and depositing such articles into upwardly open plastic cases or trays such that orderly slugs or charges of articles are deposited in each tray as the trays move end-to-end through the load station. SUMMARY OF THE INVENTION The invention provides apparatus for loading columns of articles into upwardly open rectangular cases wherein the cases have end walls and wherein the articles in the columns are arranged adjacent one another, said apparatus comprising: case conveying means for feeding cases end-to-end to and through a load station; and article moving means for advancing the articles in N columns and including a ramp across which the articles move in side-by-side rows by line pressure, said load station being provided at a downstream end of said ramp; CHARACTERIZED IN THAT the case conveying means is suitable for continuously feeding the cases; and a plurality (N plus one) of article separator discs is arranged for rotation one between each adjacent pair of article columns and one adjacent each peripheral column, each disc having first circumaxially spaced article engaging lugs for acting on predetermined article rows in timed relation with the arrival of cases at the load station to retard certain of said rows and create gaps between successive groups of articles, the gaps coinciding with the adjacent front and rear end walls of adjacent cases at the load station. Preferably the article separator discs have second, smaller article engaging lugs for moving between rows of articles in each group of articles to guide each row of articles into the cases. Neck ring guides may be provided for supporting articles with necks during their movement through the load station and preferably for suspending the articles vertically at the load station. A preferred embodiment of the invention further comprises case indexing means at said load station, said case indexing means comprising flight bars spaced apart by a distance slightly less than the length of the case to be loaded, and each such flight bar being movable upwardly at said load station through a horizontal plane defined by said case conveying means to tilt each case forwardly as it traverses the load station. The apparatus of the present invention can pack two or more columns of articles into cases, either individually or in prepackaged subgroups such as six packs of soda bottles. The articles are generally moved down the ramp to the loading station by line pressure and by gravity. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side elevational view with portions broken away or omitted illustrating an apparatus for loading articles into upwardly open plastic trays, the articles being individually plastic bottles. Fig. 2 is a plan view, portions omitted or broken away illustrating the apparatus of Fig. 1. Fig. 3 is a sectional view of the apparatus of Fig. 2. Fig. 4 is a sectional view taken generally on the line 4-4 of Fig. 1. Fig. 5 is a vertical section taken generally on the line 5-5 of Fig. 2. Fig. 6 is a side elevational view similar to that of Fig. 1, but illustrating an alternative embodiment of the present invention wherein the articles to be handled are six packs of prepackaged bottles provided in shrink wrapped subassemblies. Fig. 6A is a view similar to Fig. 6, but illustrating the configuration for the articles at a slightly later instant of time. Fig. 7 is a top plan view of the apparatus illustrated in Fig. 6. Fig. 8 is a right hand end view of the apparatus illustrated in Figs. 6-7 inclusively taken generally on the line 8-8 of Fig. 7. Fig. 8A is a schematic view similar to that of Fig. 8, but illustrating only the rotating discs with the lugs provided thereon for purposes of separating adjacent rows of articles. DETAILED DESCRIPTION OF FIGS. 1-5 Turning now to the drawings in greater detail, Fig. 1 illustrates an apparatus according to the present invention as including a fixed frame having legs 1⊘ and 12 for supporting the frame. The frame includes a superstructure indicated generally at 14 supporting a conveyor for moving articles in a plurality of side-by-side columns in the general direction of the arrow 16. This article conveyor 18 is driven from the head shaft indicated generally at 2⊘ by a drive motor 15 best shown in Fig. 2. Plastic trays or cases to be loaded are fed below the path of the articles on a case conveyor 22 which provides cases C, C in end-to-end relationship to a pair of spaced apart case conveyors 24, 24 as best shown in Fig. 2. The head shaft 26 for the case conveyor 22 and the head shaft 25 for the spaced apart case conveyors 24, 24 are provided on a beam 28 which is fixed for a particular setup, that is for loading articles of a particular geometry in a particular size case. However, the beam 28 is vertically adjustable, as for example by the crank 3⊘ through a system of four vertically oriented shafts 32 provided in the legs 1⊘ and 12. More particularly, the beam 28 can be lowered from the position shown in full lines to that illustrated generally in broken lines at 28 in Fig. 1. This adjustability permits handling cases of different height as well as handling articles of different height. A drive motor 21 operates both conveyor 22 and conveyors 24, 24. The side-by-side lanes or columns of articles are moved by line pressure, from the article conveyor 18, onto an inclined deadplate or ramp indicated generally at 34 in Figs. 1 and 2. Side guides 36, 36 are provided at the sides of the articles as they move down the inclined ramp 34, and lane dividers 38, 38 are also provided for supporting the articles in side-by-side lanes and in a plurality of side-by-side columns for movement down the ramp 34 toward a load station indicated generally at 4⊘ in Figs. 1 and 2. The ramp 34 has a downstream edge 34a which is provided just short of the load station 4⊘ so that the articles must be further guided into the load station. Inclined neck ring guides indicated generally at 42 in Figs. 1 and 2 are shown as a preferred means for guiding the columns of plastic bottles into the load station. However, glass bottles with caps attached provide the same opportunity for such a neck ring guide structure. As used in this disclosure and the appended claims the term neck ring guide is intended to cover such equivalent structure as will handle capped glass bottles. These neck ring guides define slots for slidably receiving the articles as best shown in Fig. 3. The upstream ends of these neck ring guides are provided well upstream of the downstream edge 34a of the ramp, and the downstream edges 42a of the neck ring guides are provided at a position approximately at the middle of the load station 4⊘ (that is in the middle of the case C′ shown at the load station 4⊘ in Fig. 1). As mentioned previously the cases C, C are fed in the downstream direction initially by the case conveyor 22 and then by the laterally spaced vertically adjustable case conveyors 24, 24. Case indexing means in the form of a flight bar conveyor 5⊘ controls the case moved through the load station 4⊘ and each flight bar moves upwardly between the laterally spaced case conveyors 24, 24 as shown in Figs. 1 and 2. The flight bars 52, 52 are spaced apart a distance slightly less than the length of a case C to be loaded, and thus each flight bar moves upwardly through the plane defined by the spaced case conveyors 24, 24 so as to lift the trailing end of each case in turn as the case moves through the load station 4⊘. This lifting action not only serves to assist in the loading of the articles in the case, but also serves to control the case behind each flight bar so as to permit timing of case movement with the movement of the articles being loaded. The articles are controlled in their movement so as to correlate with movement of the underlying case by rotating discs 6⊘, 6⊘ provided on a common shaft 67 and driven by a drive motor 63 best shown in Fig. 2. Each disc 6⊘ has at least one lug or protuberance provided adjacent its periphery as indicated generally at 62. Preferably, two such lugs 62, 62 are provided on each disc 6⊘ and the geometry of the disc is such that the radius of the disc corresponds roughly to the height of an article to be loaded and so that the circumference of the disc is related to the length of the case to be loaded. More particularly, with two protuberances 62, 62 on each disc 6⊘ the circumference of the disc is roughly equal to twice the length of the case C. Fig. 4 shows the case C′ being loaded and being guided between the side guides as the case is controlled by the forward flight bar 52. The underlying spaced apart case conveyors 24, 24 actually travel at a speed somewhat greater than that of the flight bar 52 so that the flight bar 52 acts to hold back the case C and closely control its movement relative to the overhead series of discs 6⊘. Fig. 5 shows the drive motor 63 for rotating the discs 6⊘. The discs are provided in a subassembly which is readily removable for replacement by a subassembly (not shown) with discs of different diameter for handling articles of different size. Fig. 5 also shows that the motor 63 and its opposed bearing block 65 are vertically adjusted in the fixed frame 64. A pair of parallel jack screws 66, 66 are rotatable together so as to permit adjustment to be made in the vertical height of the axis of rotation of shaft in 67 the disc assembly 6⊘, 6⊘. As best shown in Fig. 1 the assembly for so supporting the rotating discs 6⊘ is so constructed that the neck rings guides 42, 42a are also vertically adjustable with the disc assembly and shaft 67.. In summary the articles move downstream in side-by-side rows, being separated by lane dividers for movement on an inclined path defined in part by the ramp 34 and in part by the neck ring guides 42. The cases C, C are moved toward the load station along a path below the articles and the position of each case is controlled by a flight bar conveyor 5⊘ provided between the spaced apart conveyor belts 24, 24. Article synchronizing means in the form of discs driven in timed relation to these flight bars 52, 52 are provided with at least one protuberance, and preferably two diametrically opposed lugs, for separating selective article rows. These discs 6⊘ may have smaller lugs or protuberances between other article rows to assure that the operative lugs 62, 62 move into positions between the proper article rows to form groups or slugs of articles of the proper geometry for the case to be loaded. Each row of articles drops off the ends of the neck ring guides at approximately the midpoint of the case at the load station 4⊘. At this point the articles are already down inside the case (see Fig. 1) and hence drop less than one-half the height of the case. DETAILED DESCRIPTION OF FIGS. 6-8A Turning next to a discussion of Figs. 6-8A inclusively an apparatus of slightly different construction is illustrated for handling six pack shrink wrap container groups for loading in cases similar to those shown and described in their previous embodiment of Figs. 1-5. The individual articles or bottles may be small plastic injection molded soda bottles of the type shown in the foregoing description of Figs. 1-5, but these containers are grouped in individual six packs to form more conveniently handled six pack units or articles not only during the loading of the case in the machine to be described, but also for further handling by the retailer or customer. The apparatus of Figs. 6-8A includes the same fixed frame as described previously with legs 1⊘ and 12, and with a vertically adjustable beam 28 for supporting the head shafts of both the case conveyor 22 and the spaced apart case conveyors 24. As in the previously described embodiment this beam 28 may be adjusted vertically for purposes of handling cases of different height and/or receiving articles of different height. Comparing Figs. 6 and 7 it will be apparent that each article comprises a six pack carton which has been prepackage to provide a six pack configuration as described above. Two side-by-side lanes are provided for the articles A, A as these articles move down the inclined ramp 34. The downstream end 34a may be provided just short of the entry to the load station 4⊘ as in the previously described embodiment. However, neck ring guide need not be utilized because of the fact that the individual plastic containers or bottles have been partially preassembled to form the six pack carton shown. The six pack cartons provide sufficient stability for handling at the load station without necessity for supporting the usual bottles from neck ring guides. As in the previously described embodiment the six pack carton units or articles are controlled in their movement so as to correlate with movement of the underlying case by rotating discs 16⊘, 16⊘. These discs are provided on a common shaft 167 and driven by a drive motor 163 as best shown in Fig. 7. Each disc 16⊘ has at least one lug or protuberance provided adjacent its periphery as indicated generally at 162, and preferably two such lugs are provided on each disc 16⊘ as in the previously described embodiment. The geometry of these is such that the radius of the disc corresponds roughly to the height of an article or six pack unit to be loaded, and so that the circumference of the disc is related to the length of the case to be loaded. As in the previously described embodiment, with two protuberances 162, 162 provided on each disc 16⊘, the circumference of the disc is roughly equal to twice the length of the case C. Comparing Fig. 6 and Fig. 6A the case being loaded will receive one article as shown in Fig. 6A followed by a second article as best shown in Fig. 6 as the case C′ proceeds through the load station with its motion uninterrupted except for the fact that the article synchronizing means in the form of the discs 16⊘ will serve to match the speed of forward movement for these articles with the speed of forward movement of the cases, the latter being controlled by the flight bar conveyor 5⊘. The flight bar conveyor on the embodiment illustrated in Fig. 6-8A is identical to that shown and described previously to the embodiment of Figs. 1-5. As in the previously described embodiment the support for the article indexing means in the form of disc subassembly is vertically adjustable in a fixed framework as described previously, and as shown at 64 in Fig. 7. Fig. 8 shows the shaft 167 for rotatably supporting the disc 16⊘, and it will be apparent that this shaft 167 has couplings at each end so that the shaft can be easily removed for replacement by disc subassemblies of different geometry for accommodating articles of different geometry. In summary, the articles A, A move downstream in side-by-side relationship being separated by fixed lane dividers so that the articles will move down the inclined path defined solely by the ramp 34. The cases C, C are moved toward the load station 4⊘ along a path below the articles and each case is indexed by a flight bar conveyor 5⊘ provided between the spaced apart conveyor belts 24, 24. Article synchronizing means in the form of discs 16⊘ which are driven in timed relationship to the flight bars 52, 52 are provided with at least one protuberance, and preferably two diametrically opposed lugs, for separating selective article rows. These discs 16⊘ may have smaller lugs or protuberances between other article rows within a particular group to be loaded in a case in order to assure that the operative lugs 162 move into position between the proper article rows to form groups or slugs of articles of the proper geometry for the case to be loaded. Each row of articles drops off the downstream end 34a of the ramp 34 at approximately the midpoint of a load station 14⊘ which load station 14⊘ is defined slightly upstream of the load station 4⊘ referred to in the previously described embodiment because of the absence of the neck ring guides. At this point, at the load station, the articles are loaded in orderly rows inside the case (see Figs. 6 and 6A). The articles comprising the six pack carton shown in Figs. 6 and 6A will generally drop a vertical distance equal approximately to the height of the case C to be loaded.

Claims: Apparatus for loading columns of articles (A,A') into upwardly open rectangular cases (C,C') wherein the cases (C,C') have end walls and wherein the articles (A,A') in the columns are arranged adjacent one another, said apparatus comprising: case conveying means (24) for feeding cases (C,C') end-to-end to and through a load station (40,140); and article moving means (18) for advancing the articles (A,A') in N columns and including a ramp (34) across which the articles (A,A') move in side-by-side rows by line pressure, said load station (40,140) being provided at a downstream end of said ramp (34), CHARACTERIZED IN THAT: the case conveying means (24) is suitable for continuously feeding the cases (C,C'); and a plurality (N plus one) of article separator discs (60,160) is arranged for rotation one between each adjacent pair of article columns and one adjacent each peripheral column, each disc having first circumaxially spaced article engaging lugs (62,162) for acting on predetermined article rows in timed relation with the arrival of cases (C,C') at the load station (40,140) to retard certain of said rows and create gaps between successive groups of articles, the gaps coinciding with the adjacent front and rear end walls of adjacent cases at the load station (40,140). Apparatus according to claim 1 wherein said number of columns N is a number greater than two. Apparatus according to claim 1 or claim 2 wherein the article separator discs (60,160) have second article engaging lugs smaller than the first article engaging lugs (62,162), the second article engaging lugs moving between other article rows within each said article group to guide each row of articles into the cases (C,C') traversing said load station (40,140) said ramp being downwardly inclined so that the articles merge with the cases at said load station. Apparatus according to any preceding claim for use with articles (A,A′) having necks, wherein the article moving means (18) further comprises neck ring guides (42) for supporting the articles (A,A′) during their movement through the load station (40,140). Apparatus according to claim 4 wherein the ramp (34) and the neck ring guides (42) are downwardly inclined towards the load station (40,140), the neck ring guides (42) extend beyond the downstream end of the ramp (34), the article separator discs (60,160) rotate between the neck ring guides (42), and the neck ring guides 42 cooperate with the first article engaging lugs (62,162) to suspend the articles (A′) vertically at the load station (40,140). Apparatus according to any preceding claim wherein the article separator discs (60,160) rotate on a horizontal axis (67,167) spaced above the load station (40,140). Apparatus according to any preceding claim wherein each article separator disc (60,160) has two of the first article engaging lugs (62,162). Apparatus according to any preceding claim wherein the article separator discs (60,160) have a circumference of approximately twice the longitudinal dimension of the cases (C,C′), and a radius approximately equal to the height of the articles (A,A′) being loaded. Apparatus according to any preceding claim wherein the article separator discs (60,160) are driven at a rotational speed which moves the first article engaging lugs (62,162) at a tangential speed corresponding to the linear speed of the cases (C,C′) at the load station (40,140). Apparatus according to any preceding claim further comprising case indexing means at said load station (40,140), said case indexing means comprising flight bars (52) spaced apart by a distance slightly less than the length of the case (C′) to be loaded, and each such flight bar (52) being movable upwardly at said load station (40,140) through a horizontal plane defined by said case conveying means (24) to tilt each case (C′) forwardly as it traverses the load station (40,140).

Inventors: JOHNSON LLOYD D, JOHNSON, LLOYD D.
Applicants: STANDARD KNAPP INC, STANDARD-KNAPP INC.
Application year: 1992
Main classification: B65B21
IPC codes: B65B21, B65B5