EP0700732A1 - Encoding system for sending trolleys to their destination in a floor chain haulage system - Google Patents
Encoding system for sending trolleys to their destination in a floor chain haulage system Download PDFInfo
- Publication number
- EP0700732A1 EP0700732A1 EP95202197A EP95202197A EP0700732A1 EP 0700732 A1 EP0700732 A1 EP 0700732A1 EP 95202197 A EP95202197 A EP 95202197A EP 95202197 A EP95202197 A EP 95202197A EP 0700732 A1 EP0700732 A1 EP 0700732A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- floor
- encoding system
- trolleys
- code
- chain
- 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.)
- Granted
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Classifications
-
- 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
- B07C3/00—Sorting according to destination
- B07C3/003—Destination control; Electro-mechanical or electro- magnetic delay memories
- B07C3/005—Destination control; Electro-mechanical or electro- magnetic delay memories the transport holders of objects being provided with means for storing the destination signals
-
- 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
- B07C3/00—Sorting according to destination
- B07C3/10—Apparatus characterised by the means used for detection ofthe destination
- B07C3/12—Apparatus characterised by the means used for detection ofthe destination using electric or electronic detecting means
Definitions
- the invention concerns an encoding system for sending trolleys to their destination in a floor chain haulage system in which trolleys are moved by means of chains which are worked into metal chain rails in the floor, whereby the encoding system contains transponders mounted on the trolleys which can emit a code and, at least in one place along the floor chain path for the trolleys, code reading means which contain a spool mounted in the floor.
- the code reading means are for example erected before a bifurcation of the floor chain path and are connected to a control device which determines the path to be followed by the trolleys and for example controls the position of a switch on the bifurcation.
- Such encoding systems are used in the place of mechanical systems which contain magnetic pins which are adjustable in height and which are mounted on the trolleys. Sensors which are situated in the floor can detect the position of these magnetic pins. From this position can then be derived the destination.
- the number of codes is limited and the construction is expensive and voluminous.
- the code reading means consist of one spool worked into the floor.
- the transponder works electro-magnetically with a frequency of 100 kHz or more. Due to the presence of a large amount of metal of the trolley, the transponder can only work over a small distance, and the spool must be situated right underneath the transponder during the identification of the code. Consequently, the application in floor chain haulage systems is difficult. Because the spool is situated right or left to the chain rail, also the transponder must be mounted right or left on the trolley. As a result, one must reckon with the tracking of the trolley, for example in or behind a bend.
- the invention aims to remedy these disadvantages and to provide an encoding system for sending trolleys in a floor chain haulage system to their destinations, with which the code of the destination of a trolley can be set in a simple manner, the code of the transponders can be clearly read by the code reading means and no tracking problems occur.
- the code reading means on the above-mentioned place along the floor chain path, contain two spools which are connected in phase, including one on each side of the chain rail, whereby the metal chain rail functions as a flux conductor, whereas the transponders are of the inductive type with an adjustable code and whereby at least a transmitter and receiver part thereof is mounted above the chain rail.
- the combination of two spools and the chain rail as a flux conductor provides for an increase of the field intensity in the area above the chain rail. Because of this, and thanks to the inductive transponders, it is possible to mount the transponder centrally in relation to the width of the trolley. Practically, the transponders have an operating frequency which is lower than 100 kHz.
- the transponder on a trolley contains a setting part with knobs, and the code of this transponder can be set by means of these knobs.
- the knobs for setting the code allow for a setting without any extra means and allow for a visual recognition of the code and thus of the destination.
- the used transponders usually have a fixed code, which implies that the spool in fact identifies the trolley and the destination must be found indirectly via a control device.
- Electronically encodable transponders are known with which a code corresponding to the destination could possibly be emitted, but a special programming device is required to change the code. In both cases, the destination of the trolley is not visually shown to the users.
- the spools are mounted in a bin of flux-conducting metal which is worked into the floor.
- the signal intensity above the chain rail is even intensified.
- the encoding system mainly consists, as is represented in the figures 1 and 2, of an inductive transponder 1 on each trolley 2 and of code reading means 3 working in conjunction with it which are mounted in one or several places along the floor chain path 4 before the trolleys in the floor 5.
- the floor chain path 4 is formed in the usual manner of U-shaped chain rails 6 of flux-conducting metal such as steel, which are countersunk in the floor 5 and in which driven chains 7 are provided. A number of links of the chains 7 are catch links.
- the trolleys 2 contain a pin 8 at the front which reaches into a chain rail 6 and is caught by a catch link, so that, by means of the pin 8, the trolley 2 is taken along by the chain 7.
- the floor chain path 4 contains bifurcations, so that it reaches several destinations. At each bifurcation is mounted a switch 9 whose position can be changed by a control device 10 as a function of the destination which an arriving trolley 2 must reach and which is set by means of the transponder 1.
- This transponder 1 contains a transmitter and receiver part 11 which is connected by means of a cable 12 to the setting part 13 provided with knobs 14.
- the transmitter and receiver part 11 is mounted to the lower front of the trolley, right behind the front wheels 20, some two to twenty centimetres from the floor 5.
- This transmitter and receiver part 11 contains an electronic circuit mounted on a printed circuit-board which is worked into a disc-shaped synthetic housing.
- the operating frequency of the transponder 1 is lower than 100 kHz and preferably lower than 60 kHz, and is for example 50 kHz.
- the transmitter and receiver part 11 receives a signal from the code reading means 3, it transmits a signal in turn, namely a code in digital pulse width modulation.
- This code is determined by the setting part 13 and can be set by means of the knobs 14.
- the knobs are preferably turning knobs. They are situated at the front side of a case in which the setting part 13 is situated, so that the position of the knobs 14 is clearly visible to the user. Thanks to this position, the set code can be visually recognized from a distance.
- a code is determined by the position of all knobs 14 together, so that the number of possible code combinations depends on the number of possible positions per knob and the number of knobs. With two knobs 14 and six positions can be realized 36 different codes corresponding to 36 destinations.
- the code reading means 3 are formed of two synthetic plates 15 which each contain a spool 16.
- the spools 16 are connected by means of a cable 17 to the electronics 18 required to transmit the above-mentioned signal to the transponders 1 and to receive the response signals or codes from the transponders 1 via the control devices 10 or a central control which is connected to these control devices 10.
- the two spools 16 are connected in phase.
- the synthetic plates 15 are not mounted directly in the floor 5, but they form a lid of a metal bin 19 which is worked into the floor, as is represented in detail in figure 3.
- the encoding system works as follows.
- the user sets the code corresponding to a specific destination for each trolley 2.
- code reading means 3 which continuously or intermittently transmit a signal.
- the transmitter and receiver part 11 of the transponder 1 mounted upon it receives a signal from the spools 16, so that, as a answer, this transmitter and receiver part 11 will transmit the set code inductively in the form of a modulated signal.
- This code is read by the code reading means 3 at a speed of for example 70 ms per code and sent to the control device 10 which will either or not change the position of the switch 9.
Abstract
Description
- The invention concerns an encoding system for sending trolleys to their destination in a floor chain haulage system in which trolleys are moved by means of chains which are worked into metal chain rails in the floor, whereby the encoding system contains transponders mounted on the trolleys which can emit a code and, at least in one place along the floor chain path for the trolleys, code reading means which contain a spool mounted in the floor.
- The code reading means are for example erected before a bifurcation of the floor chain path and are connected to a control device which determines the path to be followed by the trolleys and for example controls the position of a switch on the bifurcation.
- Such encoding systems are used in the place of mechanical systems which contain magnetic pins which are adjustable in height and which are mounted on the trolleys. Sensors which are situated in the floor can detect the position of these magnetic pins. From this position can then be derived the destination. However, the number of codes is limited and the construction is expensive and voluminous.
- In known encoding systems of the mentioned type, the code reading means consist of one spool worked into the floor. The transponder works electro-magnetically with a frequency of 100 kHz or more. Due to the presence of a large amount of metal of the trolley, the transponder can only work over a small distance, and the spool must be situated right underneath the transponder during the identification of the code. Consequently, the application in floor chain haulage systems is difficult. Because the spool is situated right or left to the chain rail, also the transponder must be mounted right or left on the trolley. As a result, one must reckon with the tracking of the trolley, for example in or behind a bend.
- The invention aims to remedy these disadvantages and to provide an encoding system for sending trolleys in a floor chain haulage system to their destinations, with which the code of the destination of a trolley can be set in a simple manner, the code of the transponders can be clearly read by the code reading means and no tracking problems occur.
- This aim is reached according to the invention as the code reading means, on the above-mentioned place along the floor chain path, contain two spools which are connected in phase, including one on each side of the chain rail, whereby the metal chain rail functions as a flux conductor, whereas the transponders are of the inductive type with an adjustable code and whereby at least a transmitter and receiver part thereof is mounted above the chain rail.
- The combination of two spools and the chain rail as a flux conductor provides for an increase of the field intensity in the area above the chain rail. Because of this, and thanks to the inductive transponders, it is possible to mount the transponder centrally in relation to the width of the trolley.
Practically, the transponders have an operating frequency which is lower than 100 kHz. - Preferably, the transponder on a trolley contains a setting part with knobs, and the code of this transponder can be set by means of these knobs.
- The knobs for setting the code allow for a setting without any extra means and allow for a visual recognition of the code and thus of the destination. In the above-mentioned known encoding systems, the used transponders usually have a fixed code, which implies that the spool in fact identifies the trolley and the destination must be found indirectly via a control device. Electronically encodable transponders are known with which a code corresponding to the destination could possibly be emitted, but a special programming device is required to change the code. In both cases, the destination of the trolley is not visually shown to the users.
- In a special embodiment of the invention, the spools are mounted in a bin of flux-conducting metal which is worked into the floor.
- Thanks to the metal bin, the signal intensity above the chain rail is even intensified.
- In order to better explain the characteristics of the invention, the following preferred embodiment of an encoding system for sending trolleys to their destination in a floor chain haulage system is described as an example only, without being limitative in any way, with reference to the accompanying drawings, in which:
- figure 1 schematically shows a top view of an encoding system according to the invention;
- figure 2 shows a section according to line II-II in figure 1;
- figure 3 shows the part indicated by F3 in figure 2 in detail.
- The encoding system according to the invention mainly consists, as is represented in the figures 1 and 2, of an
inductive transponder 1 on eachtrolley 2 and of code reading means 3 working in conjunction with it which are mounted in one or several places along the floor chain path 4 before the trolleys in thefloor 5. - The floor chain path 4 is formed in the usual manner of U-shaped chain rails 6 of flux-conducting metal such as steel, which are countersunk in the
floor 5 and in which drivenchains 7 are provided. A number of links of thechains 7 are catch links. Thetrolleys 2 contain apin 8 at the front which reaches into a chain rail 6 and is caught by a catch link, so that, by means of thepin 8, thetrolley 2 is taken along by thechain 7. The floor chain path 4 contains bifurcations, so that it reaches several destinations. At each bifurcation is mounted aswitch 9 whose position can be changed by acontrol device 10 as a function of the destination which an arrivingtrolley 2 must reach and which is set by means of thetransponder 1. - This
transponder 1 contains a transmitter andreceiver part 11 which is connected by means of acable 12 to thesetting part 13 provided withknobs 14. - The transmitter and
receiver part 11 is mounted to the lower front of the trolley, right behind thefront wheels 20, some two to twenty centimetres from thefloor 5. This transmitter andreceiver part 11 contains an electronic circuit mounted on a printed circuit-board which is worked into a disc-shaped synthetic housing. - The operating frequency of the
transponder 1 is lower than 100 kHz and preferably lower than 60 kHz, and is for example 50 kHz. As soon as the transmitter andreceiver part 11 receives a signal from the code reading means 3, it transmits a signal in turn, namely a code in digital pulse width modulation. - This code is determined by the
setting part 13 and can be set by means of theknobs 14. The knobs are preferably turning knobs. They are situated at the front side of a case in which thesetting part 13 is situated, so that the position of theknobs 14 is clearly visible to the user. Thanks to this position, the set code can be visually recognized from a distance. A code is determined by the position of allknobs 14 together, so that the number of possible code combinations depends on the number of possible positions per knob and the number of knobs. With twoknobs 14 and six positions can be realized 36 different codes corresponding to 36 destinations. - The code reading means 3 are formed of two
synthetic plates 15 which each contain aspool 16. Thespools 16 are connected by means of acable 17 to theelectronics 18 required to transmit the above-mentioned signal to thetransponders 1 and to receive the response signals or codes from thetransponders 1 via thecontrol devices 10 or a central control which is connected to thesecontrol devices 10. The twospools 16 are connected in phase. - In order to increase the magnetic field intensity above the chain rail 6, the
synthetic plates 15 are not mounted directly in thefloor 5, but they form a lid of ametal bin 19 which is worked into the floor, as is represented in detail in figure 3. - The encoding system works as follows.
- By means of the
knobs 14, the user sets the code corresponding to a specific destination for eachtrolley 2. When thetrolley 2 approaches aswitch 9, it comes in the proximity of code reading means 3 which continuously or intermittently transmit a signal. When thetrolley 2 is close enough, the transmitter andreceiver part 11 of thetransponder 1 mounted upon it receives a signal from thespools 16, so that, as a answer, this transmitter andreceiver part 11 will transmit the set code inductively in the form of a modulated signal. This code is read by the code reading means 3 at a speed of for example 70 ms per code and sent to thecontrol device 10 which will either or not change the position of theswitch 9. - The same happens for each
subsequent switch 9, so that thetrolley 2 is automatically guided to its destination. - It is thanks to the selection of the low operation frequency of the
transponder 1 and the use of twospools 16 connected in phase in thefloor 5 that it becomes possible to place the transmitter and receiver part centrally behind thewheels 20, so that the encoding system is not hindered by any tracking problems. The combination of twospools 16 with the flux-conducting metal chain rail 6 results in a greater field intensity above the chain rail 6, which further increases as thespools 16 are mounted in a flux-conductingmetal bin 19. - The present invention is by no means limited to the above-described embodiment represented in the figures; on the contrary, such an encoding system can be made in all sorts of variants while still remaining within the scope of the invention as described in the claims.
Claims (9)
- Encoding system for sending trolleys (2) to their destination in a floor chain haulage system in which trolleys (2) are moved by means of chains (7) which are worked into metal chain rails (6) in the floor (5), whereby the encoding system contains transponders (1) mounted on the trolleys (2) which can emit a code and, at least in one place along the floor chain path (4) for the trolleys (2), code reading means (3) which contain a spool (16) mounted in the floor (5), characterized in that the code reading means (3), on the above-mentioned place along the floor path (4), contain two spools (15) which are connected in phase, including one on each side of the chain rail (6), whereby the metal chain rail (6) functions as a flux conductor, whereas the transponders (1) are of the inductive type with an adjustable code and whereby at least a transmitter and receiver part (11) thereof is mounted above the chain rail (6).
- Encoding system according to the preceding claim, characterized in that the inductive transponders (1) have an operating frequency lower than 100 kHz.
- Encoding system according to the preceding claim, characterized in that the transponder (1) contains a setting part (13) on a trolley (2) with knobs (14) and in that the code of this transponder (1) can be set by means of these knobs (14).
- Encoding system according to the preceding claim, characterized in that the knobs (14) are turning knobs.
- Encoding system according to any of the preceding claims, characterized in that the transmitter and receiver part (11) of the transponder (1) is mounted at the bottom of a trolley (2), as seen from the direction of movement, right behind the front wheels (20), and is mounted centrally as seen in the width.
- Encoding system according to claims 2 and 4, characterized in that the setting part (13) of a transponder (1) is mounted at the front of the trolley (2), with the knobs (14) to the front, and is connected to the transmitter and receiver part (11) by means of a cable (12).
- Encoding system according to any of the preceding claims, characterized in that the spools (15) are mounted in a bin (19) of flux-conducting metal, which is worked into the floor (2).
- Encoding system according to any of the preceding claims, characterized in that the operating frequency of the transponder (1) is lower than 60 kHz.
- Encoding system according to any of the preceding claims, characterized in that the spools (16) are embedded in a synthetic plate (15).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE9400795 | 1994-09-06 | ||
BE9400795A BE1008716A3 (en) | 1994-09-06 | 1994-09-06 | Coding system FOR THEIR DESTINATION SENDING TRUCKS IN A FLOOR CHAIN ​​TRANSPORT. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0700732A1 true EP0700732A1 (en) | 1996-03-13 |
EP0700732B1 EP0700732B1 (en) | 1999-10-20 |
Family
ID=3888334
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95202197A Expired - Lifetime EP0700732B1 (en) | 1994-09-06 | 1995-08-12 | Encoding system for sending trolleys to their destination in a floor chain haulage system |
Country Status (12)
Country | Link |
---|---|
EP (1) | EP0700732B1 (en) |
JP (1) | JPH08104421A (en) |
AT (1) | ATE185712T1 (en) |
AU (1) | AU3024995A (en) |
BE (1) | BE1008716A3 (en) |
CZ (1) | CZ227795A3 (en) |
DE (2) | DE700732T1 (en) |
DK (1) | DK0700732T3 (en) |
ES (1) | ES2086281T3 (en) |
GR (1) | GR3032450T3 (en) |
HU (1) | HUT73107A (en) |
PL (1) | PL177796B1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6097411A (en) * | 1983-10-31 | 1985-05-31 | Shin Kobe Electric Mach Co Ltd | Steering signal detector for unmanned carrier |
EP0155050A2 (en) * | 1984-03-02 | 1985-09-18 | Koninklijke KPN N.V. | Device for providing an article, more in particular a container, with a selectively adjustable code, and reading apparatus for recognizing such a code |
JPS61176688A (en) * | 1985-01-31 | 1986-08-08 | Toshiba Corp | Apparatus for automatic operation control of transfer truck |
EP0285188A1 (en) * | 1987-02-16 | 1988-10-05 | N.V. Nederlandsche Apparatenfabriek NEDAP | A method of placing an electronic responder in or near an electrically conductive article, as well as an electrically conductive article provided with an electronic responder |
WO1989010030A1 (en) * | 1988-04-11 | 1989-10-19 | Uniscan Ltd. | Actuator and communication system |
-
1994
- 1994-09-06 BE BE9400795A patent/BE1008716A3/en not_active IP Right Cessation
-
1995
- 1995-08-12 AT AT95202197T patent/ATE185712T1/en not_active IP Right Cessation
- 1995-08-12 DE DE0700732T patent/DE700732T1/en active Pending
- 1995-08-12 DE DE69512857T patent/DE69512857T2/en not_active Expired - Fee Related
- 1995-08-12 EP EP95202197A patent/EP0700732B1/en not_active Expired - Lifetime
- 1995-08-12 ES ES95202197T patent/ES2086281T3/en not_active Expired - Lifetime
- 1995-08-12 DK DK95202197T patent/DK0700732T3/en active
- 1995-08-24 AU AU30249/95A patent/AU3024995A/en not_active Abandoned
- 1995-08-28 HU HU9502517A patent/HUT73107A/en unknown
- 1995-09-04 PL PL95310276A patent/PL177796B1/en unknown
- 1995-09-05 JP JP7228144A patent/JPH08104421A/en active Pending
- 1995-09-05 CZ CZ952277A patent/CZ227795A3/en unknown
-
2000
- 2000-01-20 GR GR20000400145T patent/GR3032450T3/en not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6097411A (en) * | 1983-10-31 | 1985-05-31 | Shin Kobe Electric Mach Co Ltd | Steering signal detector for unmanned carrier |
EP0155050A2 (en) * | 1984-03-02 | 1985-09-18 | Koninklijke KPN N.V. | Device for providing an article, more in particular a container, with a selectively adjustable code, and reading apparatus for recognizing such a code |
JPS61176688A (en) * | 1985-01-31 | 1986-08-08 | Toshiba Corp | Apparatus for automatic operation control of transfer truck |
EP0285188A1 (en) * | 1987-02-16 | 1988-10-05 | N.V. Nederlandsche Apparatenfabriek NEDAP | A method of placing an electronic responder in or near an electrically conductive article, as well as an electrically conductive article provided with an electronic responder |
WO1989010030A1 (en) * | 1988-04-11 | 1989-10-19 | Uniscan Ltd. | Actuator and communication system |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 390, no. 390 (C - 394) 26 December 1986 (1986-12-26) * |
PATENT ABSTRACTS OF JAPAN vol. 9, no. 246 (P - 393) 3 October 1985 (1985-10-03) * |
Also Published As
Publication number | Publication date |
---|---|
ATE185712T1 (en) | 1999-11-15 |
DE69512857T2 (en) | 2000-05-18 |
AU3024995A (en) | 1996-03-21 |
CZ227795A3 (en) | 1996-07-17 |
PL310276A1 (en) | 1996-03-18 |
DE700732T1 (en) | 1996-11-07 |
PL177796B1 (en) | 2000-01-31 |
HUT73107A (en) | 1996-06-28 |
ES2086281T1 (en) | 1996-07-01 |
DK0700732T3 (en) | 2000-04-17 |
HU9502517D0 (en) | 1995-10-30 |
ES2086281T3 (en) | 2000-03-01 |
GR3032450T3 (en) | 2000-05-31 |
EP0700732B1 (en) | 1999-10-20 |
BE1008716A3 (en) | 1996-07-02 |
JPH08104421A (en) | 1996-04-23 |
DE69512857D1 (en) | 1999-11-25 |
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