EP0587241B1 - Fördervorrichtung - Google Patents
Fördervorrichtung Download PDFInfo
- Publication number
- EP0587241B1 EP0587241B1 EP93202566A EP93202566A EP0587241B1 EP 0587241 B1 EP0587241 B1 EP 0587241B1 EP 93202566 A EP93202566 A EP 93202566A EP 93202566 A EP93202566 A EP 93202566A EP 0587241 B1 EP0587241 B1 EP 0587241B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- conveying
- objects
- appliance
- section
- along
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H43/00—Use of control, checking, or safety devices, e.g. automatic devices comprising an element for sensing a variable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C1/00—Measures preceding sorting according to destination
- B07C1/02—Forming articles into a stream; Arranging articles in a stream, e.g. spacing, orientating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H5/00—Feeding articles separated from piles; Feeding articles to machines
- B65H5/22—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device
- B65H5/222—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device by suction devices
- B65H5/224—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device by suction devices by suction belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/30—Orientation, displacement, position of the handled material
- B65H2301/32—Orientation of handled material
- B65H2301/321—Standing on edge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/40—Type of handling process
- B65H2301/44—Moving, forwarding, guiding material
- B65H2301/445—Moving, forwarding, guiding material stream of articles separated from each other
- B65H2301/4452—Regulating space between separated articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/20—Location in space
- B65H2511/22—Distance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
- B65H2701/19—Specific article or web
- B65H2701/1916—Envelopes and articles of mail
Definitions
- the invention relates to a conveying appliance for conveying, at a controllable variable speed, separate flat objects (2), such as letters and the like, in an intermediate section between a feed section (1), in which the objects are fed in at a first conveying speed, and a discharge section (3), in which the objects are discharged at a second conveying speed, which conveying appliance comprises a first conveying element (T1) and a second conveying element (T2), suitable for accepting objects from the feed section (1), for further conveying along the intermediate section at a third, variable speed, and for handing over the accepted objects to the discharge section (3), together with a conveying system for conveying flat objects (2), such as letters and the like, in a stream of such objects, comprising:
- two spatially successive (placed "in series") conveying sections are used for conveying documents, being driven by one motor, whose speed can be controlled, in such a way that the documents in one section are conveyed at a relatively low speed and in the second section are conveyed at a higher speed. Said speeds differ by a constant factor. This difference in speed in two sections placed in series in the document stream results in a spacing being generated between two successive documents; the size thereof is measured in the second conveying section.
- the conveying speed in the two appliance sections whose speed is jointly controllable, is adjusted in order to ensure that the spacing between a document which, after leaving the appliance, moves at a constant speed, and a document following thereafter which is still within the appliance, will have the desired magnitude.
- the known appliance is used in a conveying system for documents, in which the appliance has the function of controlling the mutual spacing between two successive documents.
- the spacing is measured while the first of a pair of successive documents has already left the appliance; the spacing is controlled during that time in which the second document is situated in the second conveying section of the appliance, by adjusting the speed in the second conveying section during that time.
- the speed in the first conveying section incidentally, is also varied since the said speeds can only be controlled jointly.
- the drawback of the method in the known appliance is that only a limited time is available for controlling the spacing, which, together with the maximum permissible value for acceleration or retardation of documents in the appliance, results in limited scope for controlling the magnitude of the spacing.
- an in-series connection of the two conveying sections in the appliance makes it difficult to achieve a compact construction of the appliance.
- an appliance according to the invention is characterized in that the first and second conveying elements (T1 and T2) are separately controllable and are aligned essentially parallel to one another, and in that both are provided with pick-up means for engaging the objects.
- a conveying system according to the invention is characterized in that the first and second conveying elements (T1 and T2) are separately controllable and are aligned essentially parallel to one another, and in that both are provided with pick-up means for engaging the objects, and in that the detection means (C1) are located along the feed section.
- the dimension of an object in the conveying direction will be designated as the length of that object, and the dimension of an object transversely thereto, not being the thickness of the object, will be designated as the height of that object.
- the appliance can be used advantageously in a conveying system for flat objects; a stream of such objects is situated in said conveying system during use.
- a first object is accepted from the conveying system in the appliance by the first conveying element. Since the second conveying element is aligned essentially parallel to the first and is therefore able to accept, in virtually the same manner as the first conveying element, objects from the feed section, the next object can be accepted by the second conveying element in the appliance.
- the speeds of the conveying elements can be tailored to each other by the control means in such a way that the spacing between the first and the second object, at the instant where both have left the appliance, has the desired magnitude. The spacing control can therefore take place even while the first object has not yet completely left the appliance.
- the conveying elements in the appliance are situated next to one another, seen in the conveying direction. This is possible if, in this arrangement, they can jointly stay, in the direction transverse to the conveying direction, within the height of the objects to be conveyed, which implies that, in that direction, they must each have a dimension which is less than half the minimum height of an object.
- the conveying elements are each provided with pick-up means which, in the appliance, engage an object over a part, which differs for each of the conveying elements, of the height of that object and thus pick up the object through the appliance.
- the appliance comprises a third conveying element whose speed can likewise be controlled, quite independently of the speeds of the first and the second conveying element. This is because, at that instant, when two objects are completely situated within the appliance, a third conveying element "in the wait state" should be available to receive an arriving third object. So as to remain able to derive the full benefit of the advantages of the invention, the dimension of each of the three conveying elements transversely to the conveying direction must be less than one third of the minimum height of an object. This is found to be achievable in practice.
- the means, which supply the signals indicative for the spacing to be controlled are positioned "upstream" of the appliance, along the feed section. Said signals are then available before the first of a pair of documents, between which there is a spacing to be controlled, is accepted from the feed section in the appliance.
- the appliance according to the invention may, for example, form part of a conveying system for letters which is located in a sorting appliance for this type of flat object.
- a sorting appliance is in general provided with an input unit which takes off the letters with a fixed spacing between the trailing edge of a first letter and the leading edge of a second letter, which in principle is independent of the length of the two letters, with a fixed gap between the letters, therefore. Owing to differences in weight and surface roughness, deviations in the gaps between the letters do arise, however. In no case must these result in too small a gap, owing to which the setting of switches in the conveying section would not be able to change in time, which would lead to conveying malfunctions.
- a spacing between letters which is much larger than the minimum is undesirable, as the number of letters which can be processed per unit of time decreases as the spacing increases.
- the function of the appliance according to the invention is to ensure that a stream of letters is produced in which the spacings between successive letters comply with the specifications stipulated.
- a spacing which is too small can be set to the desired value by accelerating the letter before the intermediate spacing which is too small, by retarding the letter after the intermediate spacing which is too small, or by a combination of both measures.
- FIG 1 1 is the feed section of a conveying system for objects 2, which objects in the illustrative example have the form of letters.
- the discharge section is designated as 3 in Figure 1.
- the part of the spacing control appliance which contains the conveying elements bears the number 4.
- control element 5 is also present. Based on signals (S1), supplied by a photocell C1 which is present along the feed section 1, the control element 5 determines the spacings between documents 2 in the stream before the conveying portion 4 of the appliance. Control element 5 further receives a signal (S2) from a photocell C2, which indicates the presence of a document at the start of the spacing-correction section, and selects a free conveying element (a conveying element which at that instant is not used to pass a document through the appliance).
- S1 signals supplied by a photocell C1 which is present along the feed section 1
- the control element also receives signals (S3.1, S3.2, S3.3) from photocells C3.1, C3.2 and C3.3 at the start positions of the conveying elements and, based on consecutively received signals (S1) of the photocell C1, selects a rotational-speed function for the relevant drive motor (M1, M2 or M3) for a conveying element, in which function the course of the rotational speed as a function of time is defined.
- the motors M1, M2 and M3 are coupled to check-back elements E1, E2 and E3 which provide the control element 5 with information on the actual rotational-speed course of the relevant motor.
- FIG. 2 shows that part of the conveying appliance which contains the conveying elements.
- M1, M2 and M3 are drive motors for conveyor belts T1, T2 and T3, with drive rollers A1, A2 and A3.
- the conveyor belts T1, T2 and T3 are supported at the four corners of a rectangle by means of stacked revolving rollers, of which one in Figure 2 is designated as GOR.
- the conveyor belts are each separately supported by revolving rollers, of which OR is one.
- one of the conveyor belts T1, T2 and T3 in each case is designated to pass that document through the appliance; having the selected conveyor belt carry along that document is effected by the presence of a hole pattern in each conveyor belt, which hole pattern extends over part of each conveyor belt, in interaction with a low-pressure chamber D having a continuous hole pattern. If a conveyor belt does not, at a particular instant, carry a document along, its hole pattern is not positioned in front of the low-pressure chamber D.
- Figure 3 shows the low-pressure chamber D which on one side, along which the conveyor belts are passed, is provided with a continuous hole pattern; additionally, G is a guide plate on that side of the low-pressure chamber along which the conveyor belts are passed, and O refers to low-pressure connection points.
- FIG 4 shows an illustrative embodiment of a conveying appliance according to the invention, in which the use of a low-pressure chamber and conveyor belts T1, T2 and T3, which are each provided with a hole pattern, is combined with synchronously running conveyor belts T1', T2' and T3', which are each provided with resilient pressure elements V (V1 and V2 drawn, V3 not drawn).
- T1', T2' and T3' are the "mirrorimage" counterparts of T1, T2 and T3, having the resilient pressure elements in the place of the hole patterns.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Attitude Control For Articles On Conveyors (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
- Screw Conveyors (AREA)
- Liquid Crystal (AREA)
- Formation And Processing Of Food Products (AREA)
- Auxiliary Devices For And Details Of Packaging Control (AREA)
- Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
- Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
Claims (5)
- Fördervorrichtung zum Fördern von separaten flachen Objekten (2), wie Briefe und dergleichen, mit einer steuerbaren variablen Geschwindigkeit in einem Zwischenabschnitt zwischen einem Förderabschnitt (1), in dem die Objekte mit einer ersten Fördergeschwindigkeit befördert werden, und einem Entladeabschnitt (3), in dem die Objekte mit einer zweiten Fördergeschwindigkeit entladen werden, wobei diese Fördervorrichtung ein erstes Förderelement (T1) und ein zweites Förderelement (T2) umfasst, die zum Aufnehmen von Objekten aus dem Förderabschnitt (1) ausgebildet sind, um sie mit einer dritten variablen Geschwindigkeit den Zwischenabschnitt entlang weiterzubefördern, und um die aufgenommenen Objekte an den Entladeabschnitt (3) zu übergeben, dadurch gekennzeichnet, dass die ersten und zweiten Förderelemente (T1 und T2) separat steuerbar und im wesentlichen parallel zueinander angeordnet sind, und dass beide mit Pick-up-Mitteln versehen sind, um mit den Objekten eingreifen zu können.
- Fördervorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Vorrichtung ein drittes separat steuerbares Förderelement (T3) umfasst, das im wesentlichen parallel zum ersten und zweiten Förderelement ausgerichtet ist.
- Fördervorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Förderelemente die Objekte demselben Zwischenabschnitt entlang befördern und mit Pick-up-Mitteln versehen sind, die im Zwischenabschnitt auf verschiedenen Höhen mit den Objekten eingreifen.
- Fördervorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die Förderelemente Förderbänder und die Pick-up-Mittel Lochmuster umfassen, die in jedem Förderband einen Teil ihrer Länge entlang vorhanden sind, zusammen mit einer Unterdruckkammer, wobei die Förderbänder virtuell den ganzen Zwischenabschnitt entlang auf der Unterdruckkammer liegen, die auf der den Förderbändern gegenüberliegenden Seite mit einem Lochmuster versehen ist, das sich kontinuierlich über die Länge dieser Seite erstreckt.
- Fördersystem zum Fördern von flachen Objekten (2), wie Briefe und dergleichen, in einem Strom solcher Objekte, umfassend:- einen Förderabschnitt (1), entlang dem die Objekte in einem unbestimmten Abstand zwischen zwei aufeinanderfolgenden Objekten im Strom separat geführt werden;- einen Entladeabschnitt (3), entlang dem die Objekte in einem Abstand zwischen zwei aufeinanderfolgenden Objekten im Strom befördert werden, der sich zwischen zwei vordefinierten Grenzwerten befindet;- eine Vorrichtung zum Steuern des Abstandes zwischen zwei aufeinanderfolgenden Objekten im Strom, die in einem Zwischenabschnitt zwischen dem Förderabschnitt (1) und dem Entladeabschnitt (3) angeordnet ist, wobei diese Vorrichtung ein erstes Förderelement (T1) und ein zweites Förderelement (T2) umfasst, um Objekte aus dem Förderabschnitt (1) aufzunehmen, um sie mit einer dritten variablen Geschwindigkeit den Zwischenabschnitt entlang weiterzubefördern, und um die aufgenommenen Objekte an den Entladeabschnitt (3) zu übergeben;- Detektionsmittel (C1, 5) zum Feststellen der Anwesenheit von aufeinanderfolgenden Objekten, und, als Funktion davon, um Signale (S1) zu liefern, die den zu steuernden Abstand anzeigen;- Steuermittel (6) zum Steuern der Geschwindigkeiten der Förderelemente (T1 und T2) als Funktion der Signale (S1),dadurch gekennzeichnet, dass das erste und das zweite Förderelement (T1 und T2) separat steuerbar und im wesentlichen parallel zueinander ausgerichtet sind, und dass beide mit Pick-up-Mitteln versehen sind, um mit den Objekten eingreifen zu können, und dass die Detektionsmittel (C1) den Förderabschnitt entlang angeordnet sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL9201575 | 1992-09-10 | ||
NL9201575A NL9201575A (nl) | 1992-09-10 | 1992-09-10 | Transportinrichting. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0587241A1 EP0587241A1 (de) | 1994-03-16 |
EP0587241B1 true EP0587241B1 (de) | 1996-11-13 |
Family
ID=19861250
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93202566A Expired - Lifetime EP0587241B1 (de) | 1992-09-10 | 1993-09-03 | Fördervorrichtung |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0587241B1 (de) |
AT (1) | ATE145189T1 (de) |
DE (1) | DE69305941T2 (de) |
DK (1) | DK0587241T3 (de) |
ES (1) | ES2094468T3 (de) |
NL (1) | NL9201575A (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0916607B1 (de) * | 1997-11-13 | 2002-10-02 | Hitachi, Ltd. | Papiersortiervorrichtung zum Sortieren von Papierblättern und Artikeln |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3735976A (en) * | 1971-11-12 | 1973-05-29 | Rca Corp | Document picker |
US4331328A (en) * | 1980-06-30 | 1982-05-25 | Burroughs Corporation | Controller for a servo driven document feeder |
US4433774A (en) * | 1981-03-13 | 1984-02-28 | Stone Container Corporation | Blank conveyor apparatus |
-
1992
- 1992-09-10 NL NL9201575A patent/NL9201575A/nl not_active Application Discontinuation
-
1993
- 1993-09-03 DK DK93202566.1T patent/DK0587241T3/da active
- 1993-09-03 DE DE69305941T patent/DE69305941T2/de not_active Expired - Fee Related
- 1993-09-03 AT AT93202566T patent/ATE145189T1/de not_active IP Right Cessation
- 1993-09-03 ES ES93202566T patent/ES2094468T3/es not_active Expired - Lifetime
- 1993-09-03 EP EP93202566A patent/EP0587241B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69305941T2 (de) | 1997-04-10 |
EP0587241A1 (de) | 1994-03-16 |
DK0587241T3 (da) | 1997-04-21 |
NL9201575A (nl) | 1994-04-05 |
DE69305941D1 (de) | 1996-12-19 |
ES2094468T3 (es) | 1997-01-16 |
ATE145189T1 (de) | 1996-11-15 |
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