The present invention concerns a method for distributing articles made by series production in a storage compartment.
The invention furthermore concerns an apparatus for performing the method.
The invention has appeared during development of machines for making and delivering bags with loose ice cubes in supermarkets. Such machines are designed with a top part with an ice cube machine and a central packing machine packing the ice cubes loosely in bags, and a lower part with a storage compartment from where the filled ice cube bags are supplied as the customer opens an access door to the storage compartment, providing himself with a desired number of ice cube bags. An example of such a machine is described in the applicant's patent application WO 2008/089762.
In connection with such machines it is a problem that the bags fall down into the storage compartment over the same position. Over time, the stack of bags will form a pyramid. This causes the storage compartment to be badly utilised as it will only be partially filled, resulting in low capacity for a storage compartment of a given size. The storage compartment will rapidly reach a level and thereby a degree of filling where additional bags cannot be produced, before the filling degree is reduced.
The lower capacity of the storage compartment entails that the ice cube machine is to be dimensioned with a relatively high capacity in order to cope with peak loads. These occur e.g. in connection with festivals or by sudden rises in the outdoor temperature because of change in weather.
The problem has hitherto been solved by the staff in the supermarket performing a manual levelling of the ice cube bags in the storage compartment at short intervals. There is a desire to avoid this manual levelling as there are work safety considerations that limit the time in which the employees are allowed to work with frozen products, and a desire to release the employees' resources for other purposes in the supermarket.
The machine will also find application in connection with distribution of other serially produced articles in a storage compartment where distribution of the articles in an even layer is wanted.
It is the object of the invention to indicate a method and an apparatus that ensure an even distribution of articles, in particular bags with ice cubes made in a large number, in a storage compartment, particularly in an ice cube distribution machine in a supermarket.
According to the present invention, this is achieved by a method of the kind mentioned in the introduction which includes the following steps:
The apparatus according to the invention is peculiar in that it includes:
By a system according to the present invention, it is possible to achieve an even distribution of articles produced in series in a storage compartment in a simple way.
The system is developed for use in ice cube distribution machines for installation in e.g. supermarkets where the ice cubes are made in situ according to need, and are packed immediately before being put in a storage compartment under the ice cube machine.
The system for levelling can be applied to other types of machines than ice cube distribution machines, where a large number of articles are produced centrally above a storage compartment in which the articles are to be evenly distributed in order to utilise the capacity of the storage compartment. Examples of such applications could be in connection with a plastic injection moulding machine where a large number of articles are produced centrally, or in connection with packing and supplying other types of foods, e.g. vegetables or confectionery.
In the present application, the above mentioned ice cube distribution machine is used as example but this does not exclude other kinds of systems.
The conveyor is provided a support surface upon which the article is placed. This support surface has a horizontal orientation such that the article does not slide off the conveyor by itself, both during its start-up, movement and standstill.
The article is moved by the longitudinal displacement of the conveyor. This longitudinal displacement of the article is performed from an initial position where the article is delivered to the apparatus from the preceding production step to a desired discharge area above the storage compartment. For example, from an initial position under a dispenser unit for packed ice cube bags in an ice cube distribution machine to a discharge area above a position in the discharge space in the lower part of the machine from where the customers pick up the ice cube bags.
The number of discharge areas is determined with regard to the extension of the storage compartment along the displacement direction of the conveyor such that the distribution of articles in the storage compartment becomes even.
In practice, during the development of an ice cube distribution machine with a storage compartment having a length of about 2 m, it has appeared that there is achieved a suitable even distribution of ice cube bags in the storage compartment with four discharge areas.
The conveyor may be of a type where the support surface is formed on a slide which is suspended on an endless conveyor means. The endless conveyor means may e.g. be a chain with a path formed by a number of sprocket wheels. The slide is formed with free edges along open sides transversely to the direction of movement, and suspended along edges which are parallel with the direction of movement. Pushing off is effected over one or the other edge at one or the other side, respectively, which are transverse to the direction of movement.
A pushing off means is introduced in the path of the article. The pushing off means is oriented largely perpendicularly to the direction of movement of the conveyor and stationary during pushing off. Pushing off is effected by longitudinal displacement of the slide and thereby the support surface for the article. The article has no relative movement in relation to the pushing off means, but the article moves relatively to the slide over the edge, finally falling down over the discharge area in the storage compartment under the action of gravity and due to the relative movement between the support surface for the article and the pushing off means.
Pushing off occurs over the edge which is rearmost relative to the direction of movement of the slide.
Alternatively, the conveyor may be of a type where the support surface is formed by an endless conveyor belt. The conveyor belt has free edges along two sides which are parallel with the direction of movement of the conveyor. Pushing off is effected over one or the other edge at one or the other of the sides, respectively, which are parallel with the direction of movement of the conveyor.
A pushing off means is introduced over the conveyor belt in the path of the article. The pushing off means is oblique in relation to the direction of movement of the article and stationary during the pushing off. Pushing off is effected by longitudinal displacing the support surface of the conveyor belt for the article by interaction with the oblique stationary pushing off means, whereby the article is forced over one or the other edge of the conveyor, depending on the direction of the oblique orientation of the pushing off mechanism.
The discharge areas thus lie at each side of the conveyor.
Besides, the conveyor belt may have free edges at its ends. This provides a further discharge area for each free edge.
It applies to both types of conveyors that the conveyor means do not need to be endless. They are just to be arranged such that the direction of movement may be reversed when the support surface of the article reaches an extreme position.
The type of conveyor is chosen with regard to the shape of the storage compartment.
By storage compartments that are narrow in relation to the width, there is chosen a conveyor with free sides and edges transversely to the direction of movement in order to have discharge areas directly under the conveyor, and thereby to achieve discharge areas in one row.
By storage compartments that are wide in relation to the width, there is chosen a conveyor with free sides and edges in parallel with the direction of movement in order to have discharge areas at each side of the conveyor, and thereby to achieve discharge areas in two rows.
The pushing off means may be an arm which may freely be introduced in the path of the article and removed according to need.
Two discharge areas for each pushing off means may be attained, as the drive means for the conveyor may be selected among types with reversing direction of movement, such as electric, hydraulic or pneumatic motors or linear actuators.
An example of such a method according to the invention with one pushing off means and two discharge areas includes the steps:
When the article is discharged over the first discharge area, the pushing off means may be introduced in the path of the article before performing step B, while it before discharging the article over the second discharge area is introduced after performing step B.
In a simple way is hereby achieved that each pushing off means may cover two discharge areas.
The drive means for introducing the pushing off means may be electrically, hydraulically or pneumatically driven and based on a linear or rotating movement, or a combination of the two. Several pushing off means may advantageously be connected with the same drive means such that they are introduced in the path of the article at the same time. This provides a more simple design. The coupled pushing off means are introduced in the path of the article immediately before discharge as one hereby avoids the article being discharged over a wrong discharge area.
The apparatus is provided with a control means connected with the drive means of the apparatus. The control means can be based on an electronic circuit which may possibly be programmable. Alternatively, the control means can be a pure mechanical control which e.g, may be established by a hydraulic or pneumatic circuit.
In a particularly advantageous embodiment of the method according to the invention, this is peculiar in that the sequence for selection of the discharge area of each article is controlled by the steps:
The apparatus according to the embodiment of the method is peculiar in that it includes at least one level measuring means which is adapted for detecting the degree of filling in each discharge area in the storage compartment.
In connection with systems where one or more users take articles from the storage compartment, the degree of filling in the discharge areas may be different due to the fact that the articles are taken from the discharge areas at different rates. By actively detecting the degree of filling in the individual discharge areas and adapting the sequence of selecting discharge area on the basis of a comparison of the degrees of filling in each discharge area, there is achieved a levelling that takes account of user interaction.
An example, where a distribution machine has four discharge areas—1, 2, 3, 4—the sequence for selecting discharge area may be as follows:
Monitoring the filling degree may furthermore be utilised for controlling the production of articles.
For example, the said ice cube distribution machine may be provided with two ice cube dispensers that deliver ice cubes to a common packing unit. When the filling degree in half of the discharge areas reach 100%, it may be decided to close one ice cube dispenser and thereby control the production such that optimal efficiency and minimal idling time is achieved for the units in the production machinery.
Hereby is achieved less energy consumption and longer service life for the whole distribution machine including production machinery.
In a particularly advantageous embodiment of the method according to the invention, this is peculiar in that the conveyor is elevated to a first height while performing step A, and that the conveyor is lowered to a second height before performing step B.
The apparatus according to the embodiment of the invention is peculiar in that it includes
This embodiment of the method and the apparatus is particularly advantageous in connection with systems of a type known from the applicant's patent application WO 2008/089762 where the ice cubes are packed in film bags that are closed by welding while using welding jaws.
During filling of a film bag, this typically hangs freely in the machine such that it is possible to fill the film bag to a given weight which is measured by a weighing cell. Then the conveyor is lifted to a first height, whereby support of the film bag, which is the article, is gradually taken over by the conveyor until the former is fully supported on the support face of the conveyor. The film web is now fully relieved and not influenced by tensile forces induced by the weight of the filled film bag. Hereby is achieved a better welding as severing the film web by melting before establishing the necessary weld seams is avoided. A loaded film web will rapidly be deformed in direction of the tensile forces when melting under the action of the welding jaws such that the film bag is inadvertently released from the film web.
The conveyor has drive means for the vertical displacement. This drive means may include a linear actuator in the form of a hydraulic or pneumatic cylinder connected with the suspension points of the conveyor, a parallelogram or a guide for guiding the conveyor during the vertical displacement.
In an embodiment of the invention, wherein the conveyor includes a slide connected with an endless conveyor means in the form of a chain provided with a path formed by a number of sprocket wheels, the path is arranged such that by means of sprocket wheels at different levels and distances it provides the slide with a path where it may be displaced in height by passing the initial position for placing the articles, and be displaced in longitudinal direction towards the discharge positions.
In a particularly simple way there is hereby achieved the ability of combining longitudinal displaceability with vertical displaceability of the conveyor by means of the same construction element in the apparatus. The same drive means is used for longitudinal displacement and vertical displacement.
The invention will be explained in more detail below with reference to the accompanying drawing, where:
In the explanation of the Figures, identical or corresponding elements will be provided with the same designations in different Figures. Therefore, no explanation of all details will be given in connection with each single FIGURE/embodiment.
The machine 16 includes a top part with two ice cube machines 17 and a centrally disposed packing machine 18 and a bottom part with a storage compartment 3.
The ice cube machines 17 supply ice cubes down into film bags which are closed in the packing machine 18. A filled and closed film bag is termed an article 2 (see
The apparatus 1 is suspended under the packing machine 18 which is a dispenser of the articles 2 (see
The storage compartment 3 in the shown embodiment of the apparatus has four discharge areas 15, 15′, 15″, 15′″. When the articles are discharged over the discharge areas 15, 15′, 15″, 15′″ in a uniform sequence, a satisfactory levelling of the articles 2 (see
The degree of filling of the individual discharge areas 15, 15′, 15″, 15′″ is detected by a level measuring means 14, 14′, 14″, 14′″ for each discharge area 15, 15′, 15″, 15′″. In the shown embodiment, the level measuring means 14, 14′, 14″, 14′″ are disposed higher than the uppermost level of the articles 2 in the storage compartment 3. The risk of damage to the level measuring means 14, 14′, 14″, 14′″ due to contact with the articles 2 is thereby minimised.
On
The apparatus 1 has a conveyor 4 with a support surface 5 for an article 2 (see
A drive means for longitudinal displacement 6 of the support surface 5 of the conveyor is connected with a set of driving sprocket wheels 19. In the shown embodiment, the support surface 5 of the conveyor is disposed on a slide 11. The slide has two open sides transversely to the direction of movement with free edges 12, 13 (see
The conveyor 4 includes an endless conveyor means 10 in the form of a chain 20 at each side of the slide 11 which runs around a number of other sprocket wheels 21. The slide 11 is fastened at each side to a chain link by an adapter 22. The two chain links are disposed diagonally opposite each other. The endless conveyor means 10 both indicates a guide for the slide 11 and a connection between the drive means for longitudinal displacement 6 and the support surface 5, and thereby the slide 11.
The conveyor 4 is vertically displaceable as the chain 20 runs around three middle sprocket wheels 23 at each side. The slide 11 is elevated from a second height to a first height during passage of the three middle sprocket wheels 23. This function is used in connection with welding film bags where the support surface 5 is elevated such that an article 2 is fully supported and the film web relieved thereby, such that cutting off a film bag is avoided during welding. In the shown embodiment, the drive means for longitudinal displacement 6 coincides with the drive means for vertical displacement 9 of the support surface 5 of the conveyor.
The conveyor 4 furthermore includes a pushing off means 7 which in the shown embodiment is an arm 24 which by rotating about a shaft 25 connected with a drive means for inserting 8 the pushing off means 7 can be inserted in the path of the article. The pushing off means 7 is oriented perpendicularly to the direction of movement of the conveyor and thereby that of the slide.
In the shown embodiment, the conveyor 4 has two pushing off means 7—one at each side of the centre of the apparatus. Both arms 24 are connected to the same shaft 25 such that they both pivot down by activating the drive means for inserting 8 the pushing off means 7.
The conveyor 4 is surrounded by a frame 26 on which the above components are attached.
Outside the frame 26 are provided level measuring means 14 in a number corresponding to the number of discharge areas. In a preferred embodiment of the invention, there are four level measuring means 14, 14′, 14″, 14′″.
On
On
On
On
The slide 11 then continues longitudinal displacement towards the initial position for repeating the method.
On
The article 2 will be pushed over one 12 and the other 13, respectively, free edge of the conveyor belt, depending on its direction of movement, as the article 2 is acted on by an oblique resulting force due to the oblique orientation of the pushing off means 7.
This embodiment of the invention enables use of only one apparatus in even relatively wide storage compartments as the discharge areas are laid out in two rows, one at each side of the conveyor 4.
Number | Date | Country | Kind |
---|---|---|---|
2009 00512 | Apr 2009 | DK | national |
Number | Name | Date | Kind |
---|---|---|---|
2116300 | Campos | May 1938 | A |
2272530 | Patterson | Feb 1942 | A |
2322175 | Talbot et al. | Jun 1943 | A |
2334256 | Eaton | Nov 1943 | A |
2582381 | Higginbottom | Jan 1952 | A |
2584726 | McOmber | Feb 1952 | A |
2649235 | Edmonds | Aug 1953 | A |
2669377 | Poolen et al. | Feb 1954 | A |
2777264 | Schenk | Jan 1957 | A |
2986897 | Howard | Jun 1961 | A |
3119518 | Eschenburg et al. | Jan 1964 | A |
3151668 | Zimmerman | Oct 1964 | A |
3211338 | Weil et al. | Oct 1965 | A |
3277666 | Simmons | Oct 1966 | A |
3323280 | Rausch | Jun 1967 | A |
3380222 | Bergmann et al. | Apr 1968 | A |
3416620 | McClusky | Dec 1968 | A |
3488910 | Stoger et al. | Jan 1970 | A |
3498020 | Eppenberger | Mar 1970 | A |
3501887 | Umholtz et al. | Mar 1970 | A |
3559424 | Nelson | Feb 1971 | A |
3608657 | Johnson et al. | Sep 1971 | A |
3608786 | Shelley et al. | Sep 1971 | A |
3610482 | Van Steenburgh | Oct 1971 | A |
3618733 | Winsett | Nov 1971 | A |
3626662 | Graveley | Dec 1971 | A |
3654771 | Kuebler | Apr 1972 | A |
3688471 | Clark | Sep 1972 | A |
3698451 | Hudson | Oct 1972 | A |
3712019 | Lamka | Jan 1973 | A |
3715119 | Shelley et al. | Feb 1973 | A |
3719307 | Larson | Mar 1973 | A |
3788566 | Morris, Jr. | Jan 1974 | A |
3789570 | Mullins, Jr. | Feb 1974 | A |
3789574 | Weikert | Feb 1974 | A |
3807193 | McKenney et al. | Apr 1974 | A |
3822866 | Daester | Jul 1974 | A |
3830266 | Hudson | Aug 1974 | A |
3897676 | Membrino | Aug 1975 | A |
3903674 | Brush et al. | Sep 1975 | A |
3913343 | Rowland et al. | Oct 1975 | A |
3918266 | Gindy et al. | Nov 1975 | A |
3969909 | Barto et al. | Jul 1976 | A |
3974625 | Simmons | Aug 1976 | A |
3977851 | Toya | Aug 1976 | A |
3982377 | Vanderpool | Sep 1976 | A |
4013199 | Brown | Mar 1977 | A |
4027459 | Nieskens et al. | Jun 1977 | A |
4056215 | Zwahlen | Nov 1977 | A |
4074507 | Ruf et al. | Feb 1978 | A |
4088243 | Deveson | May 1978 | A |
4129015 | Morris, Jr. | Dec 1978 | A |
4132049 | Mullins, Jr. | Jan 1979 | A |
4136803 | Tobias et al. | Jan 1979 | A |
4137689 | McClusky et al. | Feb 1979 | A |
4139029 | Geraci | Feb 1979 | A |
4139126 | Krasner | Feb 1979 | A |
4158426 | Frohbieter | Jun 1979 | A |
4189063 | Matthieson | Feb 1980 | A |
4252002 | Mullins, Jr. | Feb 1981 | A |
4276751 | Saltzman et al. | Jul 1981 | A |
4320615 | Gmuer | Mar 1982 | A |
4348872 | Hill | Sep 1982 | A |
4350004 | Tsujimoto et al. | Sep 1982 | A |
4368608 | Ray | Jan 1983 | A |
4404817 | Cox | Sep 1983 | A |
4409763 | Rydeen | Oct 1983 | A |
4420197 | Dreiling | Dec 1983 | A |
4461520 | Alneng | Jul 1984 | A |
4467622 | Takahashi et al. | Aug 1984 | A |
4478386 | Mikkelsen | Oct 1984 | A |
4487093 | Peroutky | Dec 1984 | A |
4522292 | Euverard | Jun 1985 | A |
4527401 | Nelson | Jul 1985 | A |
4534155 | Sawa et al. | Aug 1985 | A |
4587810 | Fletcher | May 1986 | A |
4598529 | Pongrass et al. | Jul 1986 | A |
4612779 | Hatton | Sep 1986 | A |
4673103 | Anderson et al. | Jun 1987 | A |
4689937 | Finan, Sr. et al. | Sep 1987 | A |
4715167 | Savigny | Dec 1987 | A |
4732301 | Tobias | Mar 1988 | A |
4803847 | Koeneman et al. | Feb 1989 | A |
4850202 | Kito et al. | Jul 1989 | A |
4878523 | Balsamico et al. | Nov 1989 | A |
4903494 | Wigley | Feb 1990 | A |
4909696 | Wigley | Mar 1990 | A |
4930685 | Landers | Jun 1990 | A |
4942979 | Linstromberg et al. | Jul 1990 | A |
4942983 | Bradbury | Jul 1990 | A |
4979353 | Seppala | Dec 1990 | A |
4981237 | Landers | Jan 1991 | A |
4995219 | Hicks | Feb 1991 | A |
5005341 | Tetenborg | Apr 1991 | A |
5009060 | Furukawa | Apr 1991 | A |
5027610 | Hara | Jul 1991 | A |
5056299 | Furukawa | Oct 1991 | A |
5070798 | Jurgens | Dec 1991 | A |
5079897 | Muller | Jan 1992 | A |
5088300 | Wessa | Feb 1992 | A |
5108590 | DiSanto | Apr 1992 | A |
5109651 | Stuart | May 1992 | A |
5112477 | Hamlin | May 1992 | A |
5211030 | Jameson | May 1993 | A |
5277016 | Williams et al. | Jan 1994 | A |
RE34533 | Wigley | Feb 1994 | E |
5440863 | Toya et al. | Aug 1995 | A |
5473865 | Tanaka et al. | Dec 1995 | A |
5630310 | Chadwell | May 1997 | A |
5722215 | Yuyama | Mar 1998 | A |
5791123 | Bolz | Aug 1998 | A |
5813196 | Page et al. | Sep 1998 | A |
5822955 | Woosley et al. | Oct 1998 | A |
5832700 | Kammler et al. | Nov 1998 | A |
6112539 | Colberg | Sep 2000 | A |
6237308 | Quintin et al. | May 2001 | B1 |
6282869 | Bullock et al. | Sep 2001 | B1 |
6305177 | Edwards et al. | Oct 2001 | B1 |
6474048 | Metzger et al. | Nov 2002 | B1 |
6725625 | Honma et al. | Apr 2004 | B1 |
6862866 | Jacobsen et al. | Mar 2005 | B2 |
6904765 | Lee et al. | Jun 2005 | B2 |
6904946 | James | Jun 2005 | B2 |
7062892 | Metzger | Jun 2006 | B2 |
7331163 | Hau et al. | Feb 2008 | B2 |
7421834 | Doolan | Sep 2008 | B1 |
7426812 | Metzger | Sep 2008 | B2 |
7426945 | Dalton et al. | Sep 2008 | B2 |
7669434 | Leclear et al. | Mar 2010 | B2 |
7681408 | Hobson et al. | Mar 2010 | B2 |
7849660 | Metzger | Dec 2010 | B2 |
7958918 | Ladson | Jun 2011 | B2 |
7992364 | Thurgood et al. | Aug 2011 | B2 |
8122689 | Pape | Feb 2012 | B2 |
8299656 | Allard et al. | Oct 2012 | B2 |
8336975 | Allard et al. | Dec 2012 | B2 |
8438870 | Leclear et al. | May 2013 | B2 |
20030000180 | Singer | Jan 2003 | A1 |
20040216481 | James et al. | Nov 2004 | A1 |
20050115210 | Noumi | Jun 2005 | A1 |
20060021300 | Tada et al. | Feb 2006 | A1 |
20060090427 | Hau et al. | May 2006 | A1 |
20080047233 | Metzger | Feb 2008 | A1 |
20080110129 | LeBlanc et al. | May 2008 | A1 |
20080283145 | Maxwell | Nov 2008 | A1 |
20080295462 | Metzger | Dec 2008 | A1 |
20100011710 | Pape | Jan 2010 | A1 |
20100024363 | Pape | Feb 2010 | A1 |
20100313524 | Pape et al. | Dec 2010 | A1 |
20120070264 | Pape | Mar 2012 | A1 |
20130255194 | Metzger | Oct 2013 | A1 |
Number | Date | Country |
---|---|---|
2150499 | Dec 1993 | CN |
0459050 | Dec 1991 | EP |
1123884 | Aug 2001 | EP |
1696192 | Aug 2006 | EP |
2650559 | Feb 1991 | FR |
1459629 | Dec 1976 | GB |
2011633 | Jul 1979 | GB |
H1-33455 | Oct 1989 | JP |
H2-41067 | Mar 1990 | JP |
05132007 | May 1993 | JP |
WO0001582 | Jan 2000 | WO |
WO2008089762 | Jul 2008 | WO |
Entry |
---|
International Search Report from PCT/DK2008/000027, Apr. 3, 2008. |
Office Action and Search Report issued on Jan. 20, 2014 for related CN Patent Application No. 201180044860.X, in 10 pages. |
Number | Date | Country | |
---|---|---|---|
20100263335 A1 | Oct 2010 | US |