EP0200039B1 - Industrial truck with a counting device - Google Patents

Industrial truck with a counting device Download PDF

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Publication number
EP0200039B1
EP0200039B1 EP86104790A EP86104790A EP0200039B1 EP 0200039 B1 EP0200039 B1 EP 0200039B1 EP 86104790 A EP86104790 A EP 86104790A EP 86104790 A EP86104790 A EP 86104790A EP 0200039 B1 EP0200039 B1 EP 0200039B1
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EP
European Patent Office
Prior art keywords
industrial truck
load
cycle
registers
receiving means
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Expired
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EP86104790A
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German (de)
French (fr)
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EP0200039A1 (en
Inventor
Karlheinz Keil
Werner Kühles
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Privates Institut fur Physikalisch Technische Auftragsforschung GmbH
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Privates Institut fur Physikalisch Technische Auftragsforschung GmbH
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Priority to AT86104790T priority Critical patent/ATE38731T1/en
Publication of EP0200039A1 publication Critical patent/EP0200039A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • B66F9/24—Electrical devices or systems
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C1/00—Registering, indicating or recording the time of events or elapsed time, e.g. time-recorders for work people
    • G07C1/10—Registering, indicating or recording the time of events or elapsed time, e.g. time-recorders for work people together with the recording, indicating or registering of other data, e.g. of signs of identity
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C3/00—Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
    • G07C3/08—Registering or indicating the production of the machine either with or without registering working or idle time
    • G07C3/10—Registering or indicating the production of the machine either with or without registering working or idle time using counting means

Definitions

  • the invention relates to an industrial truck, consisting of a chassis and a load suspension device fastened thereon.
  • Industrial trucks are used to take up and transport individual loads or load units, in which travel is essentially on one level or only slight gradients have to be overcome.
  • single or multi-wheeled, manually driven or motor-driven industrial trucks can be used, which can be differentiated according to track-bound or trackless. What they all have in common is that they have a chassis that is used for transport and a load handler to lift the individual loads.
  • One of the best-known representatives of industrial trucks is the forklift, which is used in in-house transport to stack, lift and process piece goods, pallets and containers. It is driven by an electric or internal combustion engine and carries a lifting device on the front.
  • a lifting truck with a load suspension device for example in the form of a fork, shovel, gripping tongs for bales, rollers etc.
  • a load suspension device for example in the form of a fork, shovel, gripping tongs for bales, rollers etc.
  • One of the most common uses of such industrial trucks is to load, stack and remove goods in storage systems, warehouses or the like.
  • performance-related chord wages have been paid to create considerable performance incentives, the main problem of which is the recording of the individual work performed by every person operating such an industrial truck.
  • the distance traveled by each industrial truck is not a sufficiently precise measure of the work performed by the operator, since it is less a question of the distance traveled, but rather the number of load receptacles and transport movements when recording the actual performance.
  • the invention has set itself the task of creating a device by means of which an exact and concrete performance control is possible and the risk of misuse is eliminated as far as possible.
  • a work-counting device is connected to at least one sensor that registers the forward and / or reverse travel and at least one other sensor that registers the lifting and / or lowering of the load suspension device in that the control of the meter is via there is a microprocessor that links the encoder signals in a predetermined sequence via the individual actions of the industrial truck, further individual actions of the same type not being taken into account within a cyclic operation after a single action, and that the cyclic operation is only counted after the cycle has been completed.
  • the invention is based on the following: In order to record the actual performance of an industrial truck or the operator, several individual actions must be carried out per work process. At the beginning, the goods to be transported are to be grasped with the load handler, then lifted and brought to the destination by forward and / or backward travel, where they are deposited by lowering the load handler and releasing them. With each work process, several individual actions have to be cycled with regard to the transport of a single piece. The main idea of the invention is to count the number of these cycles and in this way to record the work performance.
  • the counting device is controlled with the aid of a microprocessor, the task of which is to process the incoming signals from the various sensors and to actuate the counting device in the manner specified.
  • microprocessor includes programmability, so that it is ultimately up to the user to decide how many individual actions a single cycle is composed of. For example, it is conceivable that a counting pulse is already generated when the industrial truck has moved forward once, the load handler has moved upwards and then a forward or reverse drive has been carried out.
  • the task of the sensors is to generate a pulse when the truck is actuated appropriately, such as driving forward or backward, raising or lowering the load handler, and in particular to delivering the associated microprocessor to the counter. This receives the signals from the individual encoders on separate channels and, if the individual action is expected due to the programming of the microprocessor, switches one step further until the entire cycle has been completed, which then triggers the counting pulse.
  • the microprocessor has the property that the pulse triggered for the first time by a single action or the associated encoder is registered, provided that due to the given programming a signal from this encoder is expected, all other signals from this encoder are suppressed and not registered. This ensures that the triggering of a counting pulse cannot occur when the same individual action is carried out repeatedly. This is particularly important because in the case of shunting movements, the encoder which displays the travel movements emits a plurality of signals which, however, are irrelevant for the recording and registration of the work performed and for this reason must also be disregarded. Rather, the microprocessor only switches on when the next individual action due to the programming sends a corresponding signal to the microprocessor.
  • the change in the status of the counter is a direct measure of the scope of the work carried out during the observation period. Due to the measure that a counting pulse is only triggered after a cycle consisting of several individual actions has been completed, and also due to the fact that several individual actions of the same type are triggered by the microprocessor suppressed, one achieves that an improper triggering of the counting impulses can be prevented.
  • the result is a counter,. that an immediate, direct and hardly falsifiable statement about the work performance of the respective industrial truck or the operator can provide.
  • the use of a total of 4 sensors is proposed, one of which registers the forward movement, the other the lifting of the load handler, a third the forward or reverse movement, and the fourth the lowering of the load handler and a corresponding one Passes impulse to the microprocessor, these four individual actions are combined in a cycle.
  • a counting pulse occurs only after a cycle has been completed. Furthermore, maneuvering movements of the forklift truck, as may be necessary when pushing the fork under the pallet, have no effect on the work result displayed by the counter, since the first program point of the microprocessor is processed when driving for the first time and regardless of the number of and driving backwards only continues when the next, here second logical step is taken, i.e. the (first) lifting of the fork and consequently also the pallet on it.
  • the relationships just described also apply analogously to the other program items to be processed by the microprocessor. As a result, the change in the status of the counter gives a direct measure of the number of transports carried out and thus the work performed. This enables direct control and a fair assessment of the work performed.
  • the encoder be controlled by a power-free potential tap on the electrical operating system. In terms of construction, this is one of the simplest and cheapest solutions.
  • the invention is explained in more detail below on the basis of an exemplary embodiment shown in the drawing. It shows the counting device according to the invention for an industrial truck in a perspective view.
  • the counting device 1 shown consists in its basic structure of a housing 2 and a cable 3.
  • the essentially rectangular housing 2 is equipped on its front side with a counter 4 visible from the outside.
  • a fuse 5 and a control lamp 6 are attached, which, as usual, light up when the device is connected to voltage in order to indicate that it is ready for operation.
  • the core of the counting device 1 according to the invention is installed in the interior of the housing 2 in the form of a microprocessor, which receives its information and energy supply via the cable 3 from the outside and which controls the counting device 1 according to its programming and on the basis of the signals supplied via the cable 3 and in particular also of the counter 4.
  • the cable 3 consists of a total of six phases, the two phases 7 on the right serving to connect to an energy source for supplying electrical energy.
  • the remaining four phases 8 are each electrically conductively connected to a sensor (not shown here) located in the industrial truck.
  • phase 8a is connected to the encoder that registers the forward movement of the industrial truck
  • phase 8b to the encoder that detects the lifting of the load handler
  • phase 8c to the encoder that receives the forward or reverse movement
  • plug connections 9 are attached to the end of phases 7, 8.
  • the counting device 1 shown is first introduced into the industrial truck and the two phases 7 are connected to the electrical power supply and the four phases 8 are connected to the respective sensors. If, at the start of a transport and thus also a cycle, the industrial truck starts to move forward, for example to push the fork under the pallet to be transported, the associated transmitter 8 gives a signal to phase 8a which indicates the first step of the process to be carried out Cycle switches. If several forward movements are subsequently carried out, for example, by maneuvering, these are suppressed by the microprocessor. The second step of the cycle is only reached when the next individual action, namely lifting the load handler, takes place.
  • the third step of the cycle is only reached when there is a forward or backward drive, although here it is also of no importance how many driving movements are carried out in detail.
  • Switching on and reaching the fourth and last individual action results from the lowering of the load handler.
  • the cycle consisting of four individual actions in the previous case has thus been completed, which triggers the counting pulse by which the counter is switched on.
  • the change in the status of the counter 4 directly indicates the number of transports carried out. In this way, you get a counter for an industrial truck, which enables concrete performance monitoring and fair remuneration, while at the same time offering a high degree of security against misuse.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • General Physics & Mathematics (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Civil Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Warehouses Or Storage Devices (AREA)

Abstract

1. Industrial truck consisting of a chassis and load-receiving means fastened thereupon, wherein a counting mechanism (1) that counts the work operations, is in connection with at least one detector, which registers the forward and/or reverse travel and at least one additional detector that registers the raising and/or lowering of said load-receiving means, the control of said counting device is effected by a microprocessor, which connects the detectors signals for the individual actions of said industrial conveyor, whereby after one individual action further individual actions of the same kind within a cyclical work process are not considered, and a count of said cyclical work process is made only after completion of said cycle.

Description

Die Erfindung betrifft ein Flurförderzeug, bestehend aus einem Fahrwerk und einem darauf befestigten Lastaufnahmemittel.The invention relates to an industrial truck, consisting of a chassis and a load suspension device fastened thereon.

Flurförderzeuge dienen der Aufnahme und dem Transport von Einzellasten oder Ladungseinheiten, bei denen im wesentlichen in einer Ebene verfahren oder nur geringe Steigungen zu überwinden sind. Grundsätzlich können ein- oder mehrrädrige, von Hand fahrbare oder motorisch angetriebene Flurförderzeuge verwendet werden, die man nach gleisgebundenen oder gleislosen unterscheiden kann. Allen ist gemeinsam, dass sie ein dem Transport dienendes Fahrwerk und zum Anheben der Einzellasten ein Lastaufnahmemittel aufweisen. Einer der bekanntesten Vertreter der Flurförderzeuge ist der Gabelstapler, der im innerbetrieblichen Transportverkehr zum Stapeln, Heben und Verfahren von Stückgütern, Paletten und Behältern eingesetzt wird. Er wird durch einen Elektro- oder Verbrennungsmotor angetrieben und trägt an der Stirnseite ein Hubrüstgerät. In diesem wird ein Hubwagen mit einem Lastaufnahmemittel, beispielsweise in Form einer Gabel, Schaufel, Greifzange für Ballen, Rollen etc., hydraulisch auf-und abbewegt. Eine der häufigsten Einsätze derartiger Flurförderzeuge ist das Einbringen, Stapeln und Herausnehmen von Waren in Lagersystemen, Lagerhäusern oder dergleichen. Zur Schaffung erheblicher Leistungsanreize werden in diesen Bereichen seit geraumer Zeit leistungsbezogene Akkordlöhne bezahlt, deren Hauptproblem jedoch in der Erfassung der individuellen Arbeitsleistung jeder ein derartiges Flurförderzeug bedienenden Person zu sehen ist. Wie man weiss, ist der zurückgelegte Weg jedes Flurförderzeuges ein nicht hinreichend exaktes Mass für die Arbeitsleistung der Bedienungsperson, da es weniger auf den zurückgelegten Weg, sondern vielmehr auf die Anzahl der Lastenaufnahmen und Transportbewegungen bei der Erfassung der tatsächlichen Leistung ankommt.Industrial trucks are used to take up and transport individual loads or load units, in which travel is essentially on one level or only slight gradients have to be overcome. Basically, single or multi-wheeled, manually driven or motor-driven industrial trucks can be used, which can be differentiated according to track-bound or trackless. What they all have in common is that they have a chassis that is used for transport and a load handler to lift the individual loads. One of the best-known representatives of industrial trucks is the forklift, which is used in in-house transport to stack, lift and process piece goods, pallets and containers. It is driven by an electric or internal combustion engine and carries a lifting device on the front. In this, a lifting truck with a load suspension device, for example in the form of a fork, shovel, gripping tongs for bales, rollers etc., is moved up and down hydraulically. One of the most common uses of such industrial trucks is to load, stack and remove goods in storage systems, warehouses or the like. For some time now, performance-related chord wages have been paid to create considerable performance incentives, the main problem of which is the recording of the individual work performed by every person operating such an industrial truck. As is known, the distance traveled by each industrial truck is not a sufficiently precise measure of the work performed by the operator, since it is less a question of the distance traveled, but rather the number of load receptacles and transport movements when recording the actual performance.

Hiervon ausgehend hat sich die Erfindung die Schaffung einer Vorrichtung zur Aufgabe gemacht, mit deren Hilfe eine exakte und konkrete Leistungskontrolle möglich wird und die Gefahr des Missbrauches soweit wie möglich ausgeschaltet ist.Proceeding from this, the invention has set itself the task of creating a device by means of which an exact and concrete performance control is possible and the risk of misuse is eliminated as far as possible.

Gemäss der Erfindung wird diese Aufgabe dadurch gelöst, dass ein Arbeitsvorgänge zählendes Zählgerät mit wenigstens einem die Vor- und/oder Rückwärtsfahrt registrierenden Geber und wenigstens einem weiteren das Heben und/oder Senken des Lastaufnahmemittels registrierenden Geber in Verbindung steht, dass die Steuerung des Zählgerätes über einen Mikroprozessor erfolgt, der die Gebersignale über die Einzelaktionen des Flurförderzeugs in vorgegebener Reihenfolge verknüpft, wobei nach einer Einzelaktion weitere Einzelaktionen der gleichen Art innerhalb eines zyklischen Arbeitsvorgangs nicht berücksichtigt werden, und dass eine Zählung des zyklischen Arbeitsvorgangs erst nach Durchlaufen des Zyklus erfolgt.According to the invention, this object is achieved in that a work-counting device is connected to at least one sensor that registers the forward and / or reverse travel and at least one other sensor that registers the lifting and / or lowering of the load suspension device in that the control of the meter is via there is a microprocessor that links the encoder signals in a predetermined sequence via the individual actions of the industrial truck, further individual actions of the same type not being taken into account within a cyclic operation after a single action, and that the cyclic operation is only counted after the cycle has been completed.

Die Erfindung geht von folgendem aus: Zur Erfassung der tatsächlichen Leistung eines Flurförderzeugs bzw. der Bedienungsperson sind pro Arbeitsvorgang mehrere Einzelaktionen durchzuführen. So ist zu Beginn das Transportgut mit dem Lastaufnahmemittel zu erfassen, anschliessend anzuheben und durch Vor- und/oder Rückwärtsfahrt an den Bestimmungsort zu verbringen, an dem es durch Absenken des Lastaufnahmemittels und Freigabe abgesetzt wird. Bei jedem Arbeitsvorgang sind damit in Bezug auf den Transport eines Einzelstückes mehrere Einzelaktionen zyklisch zu durchlaufen. Der Kerngedanke der Erfindung besteht darin, die Zahl dieser Zyklen zu zählen und auf diese Weise die Arbeitsleistung festzuhalten. Die Steuerung des Zählgerätes erfolgt mit Hilfe eines Mikroprozessors, dessen Aufgabe darin besteht, die von den verschiedenen Gebern eingangsseitig ankommenden Signale weiterzuverarbeiten und in der angegebenen Weise das Zählgerät anzusteuern. Der Begriff «Mikroprozessor» beinhaltet eine Programmierbarkeit, so dass es letztlich dem Benutzer überlassen bleibt, aus wieviel Einzelaktionen ein einziger Zyklus zusammengesetzt ist. So ist beispielsweise denkbar, dass bereits dann ein Zählimpuls zustande kommt, wenn das Flurförderzeug einmal vorwärts gefahren ist, das Lastaufnahmemittel sich nach oben bewegt hat und anschliessend eine Vor- oder Rückwärtsfahrt durchgeführt worden ist. Die Aufgabe der Geber besteht darin, bei einer entsprechenden Betätigung des Flurförderzeuges, wie z.B. Vor- oder Rückwärtsfahrt, Anheben oder Absenken des Lastaufnahmemittels einen Impuls zu erzeugen und an das Zählgerät insbesondere den dazugehörigen Mikroprozessor abzugeben. Dieser empfängt die Signale der einzelnen Geber auf getrennten Kanälen und schaltet, sofern auf Grund der Programmierung des Mikroprozessors die jeweilige Einzelaktion erwartet wird, um einen Schritt weiter und zwar solange, bis der gesamte Zyklus durchlaufen ist, was dann den Zählimpuls auslöst. Dabei hat der Mikroprozessor die Eigenschaft, dass der durch eine Einzelaktion bzw. den zugehörigen Geber erstmalig ausgelöste Impuls registriert wird, sofern aufgrund der gegebenen Programmierung ein Signal dieses Gebers erwartet wird, alle weiteren Signale dieses Gebers hingegen unterdrückt und nicht registriert werden. Auf diese Weise ist sichergestellt, dass die Auslösung eines Zählimpulses bei wiederholtem Durchführen derselben Einzelaktion nicht zustande kommen kann. Dies ist insbesondere deshalb von Bedeutung, weil bei Rangierbewegungen der die Fahrbewegungen anzeigende Geber mehrere Signale abgibt, die für die Erfassung und Registrierung der Arbeitsleistung jedoch ohne Bedeutung sind und aus diesem Grunde auch unberücksichtigt bleiben müssen. Vielmehr schaltet der Mikroprozessor erst dann weiter, wenn die auf Grund der Programmierung nächste Einzelaktion durch ihren Geber ein entsprechendes Signal an den Mikroprozessor leitet. Auf diese Weise erfolgt ein sukzessives Durchlaufen des Zyklus, an dessen Ende der Zählimpuls ausgelöst wird. Die Veränderungen des Standes des Zählgerätes ist ein unmittelbares Mass für den Umfang der während des Beobachtungszeitraumes vorgenommenen Arbeiten. Durch die Massnahme, dass zum einen erst nach Durchlaufen eines aus mehreren Einzelaktionen bestehenden Zyklus ein Zählimpuls ausgelöst wird als auch durch die Tatsache, dass mehrere Einzelaktionen der gleichen Art durch den Mikroprozessor unterdrückt werden, erreicht man, dass eine missbräuchliche Auslösung der Zählimpulse unterbunden werden kann. Als Ergebnis erhält man ein Zählgerät, . dass eine unmittelbare, direkte und kaum verfälschbare Aussage über die Arbeitsleistung des jeweiligen Flurförderzeuges bzw. der Bedienungsperson erbringen kann. Der Aufbau des Zählgerätes und insbesondere der zugehörigen, die erfindungsgemässen Befehle ausführenden elektronischen Schaltung bereitet bei Verwendung logischer Bauelemente keinerlei nennenswerte Schwierigkeiten. Dabei steht im Rahmen der Erfindung grundsätzlich frei, auf welche Art und Weise die Programmierung des Mikroprozessors erfolgt, insbesondere wieviele Einzelaktionen miteinander zu einem einzigen Zyklus verknüpft werden, an dessen Ende der Zählimpuls ausgelöst wird.The invention is based on the following: In order to record the actual performance of an industrial truck or the operator, several individual actions must be carried out per work process. At the beginning, the goods to be transported are to be grasped with the load handler, then lifted and brought to the destination by forward and / or backward travel, where they are deposited by lowering the load handler and releasing them. With each work process, several individual actions have to be cycled with regard to the transport of a single piece. The main idea of the invention is to count the number of these cycles and in this way to record the work performance. The counting device is controlled with the aid of a microprocessor, the task of which is to process the incoming signals from the various sensors and to actuate the counting device in the manner specified. The term “microprocessor” includes programmability, so that it is ultimately up to the user to decide how many individual actions a single cycle is composed of. For example, it is conceivable that a counting pulse is already generated when the industrial truck has moved forward once, the load handler has moved upwards and then a forward or reverse drive has been carried out. The task of the sensors is to generate a pulse when the truck is actuated appropriately, such as driving forward or backward, raising or lowering the load handler, and in particular to delivering the associated microprocessor to the counter. This receives the signals from the individual encoders on separate channels and, if the individual action is expected due to the programming of the microprocessor, switches one step further until the entire cycle has been completed, which then triggers the counting pulse. The microprocessor has the property that the pulse triggered for the first time by a single action or the associated encoder is registered, provided that due to the given programming a signal from this encoder is expected, all other signals from this encoder are suppressed and not registered. This ensures that the triggering of a counting pulse cannot occur when the same individual action is carried out repeatedly. This is particularly important because in the case of shunting movements, the encoder which displays the travel movements emits a plurality of signals which, however, are irrelevant for the recording and registration of the work performed and for this reason must also be disregarded. Rather, the microprocessor only switches on when the next individual action due to the programming sends a corresponding signal to the microprocessor. In this way, the cycle is successively run through, at the end of which the counting pulse is triggered. The change in the status of the counter is a direct measure of the scope of the work carried out during the observation period. Due to the measure that a counting pulse is only triggered after a cycle consisting of several individual actions has been completed, and also due to the fact that several individual actions of the same type are triggered by the microprocessor suppressed, one achieves that an improper triggering of the counting impulses can be prevented. The result is a counter,. that an immediate, direct and hardly falsifiable statement about the work performance of the respective industrial truck or the operator can provide. The construction of the counting device and, in particular, of the associated electronic circuit which executes the commands according to the invention does not cause any noteworthy difficulties when using logic components. In the context of the invention, it is fundamentally free in which way the microprocessor is programmed, in particular how many individual actions are linked together to form a single cycle, at the end of which the counting pulse is triggered.

In einer vorteilhaften Weiterbildung der Erfindung ist im besonderen die Verwendung von insgesamt 4 Gebern vorgeschlagen, von denen jeweils eine die Vorwärtsfahrt, der andere das Heben des Lastaufnahmemittels, ein dritter die Vor- oder Rückwärtsfahrt, und der vierte das Senken des Lastaufnahmemittels registriert und einen entsprechenden Impuls an den Mikroprozessor weitergibt, wobei diese vier Einzelaktionen zu einem Zyklus zusammengesetzt sind. Hierbei macht man sich die Tatsache zunutze, dass zur vollständigen Durchführung eines Transportes mit Hilfe bestimmter Flurförderzeuge, wie beispielsweise einem Gabelstapler vier Einzelaktionen erforderlich sind: Als erstes muss eine Vorwärtsfahrt durchgeführt werden, bei der die Gabel unter die Palette geschoben wird, anschliessend wird die Gabel und damit gleichzeitig auch die darauf befindliche Palette angehoben, als nächstes wird die Palette durch Vor- oder Rückwärtsfahrt an den gewünschten Ablageort transportiert, wo sie als letztes schliesslich durch Senken der Gabel abgesetzt wird. Ein Zählimpuls ergeht erst nach vollständigem Durchlaufen eines Zyklus. Des weiteren bleiben Rangierbewegungen des Gabelstaplers, wie sie beim Einschieben der Gabel unter die Palette unter Umständen erforderlich sind, ohne Einfluss auf das durch das Zählgerät angezeigte Arbeitsresultat, da beim erstmaligen Vorwärtsfahren der erste Programmpunkt des Mikroprozessors abgearbeitet wird und unabhängig von der Anzahl der Vor- und Rückwärtsfahrten erst dann weiterläuft, wenn der nächste, hier also zweite logische Schritt vorgenommen wird, also das (erstmalige) Anheben der Gabel und demzufolge auch der darauf befindliche Palette. Die soeben beschriebene Zusammenhänge treffen in analoger Weise auch auf die anderen vom Mikroprozessor abzuarbeitenden Programmpunkte zu. Im Ergebnis erhält man durch die Veränderung des Standes des Zählgerätes ein unmittelbares Mass für die Zahl der durchgeführten Transporte und damit der erbrachten Arbeitsleistung. Eine unmittelbare Kontrolle und gerechte Feststellung der erbrachten Arbeitsleistung lässt hierdurch erreichen.In an advantageous development of the invention, the use of a total of 4 sensors is proposed, one of which registers the forward movement, the other the lifting of the load handler, a third the forward or reverse movement, and the fourth the lowering of the load handler and a corresponding one Passes impulse to the microprocessor, these four individual actions are combined in a cycle. This takes advantage of the fact that four individual actions are required to complete a transport using certain industrial trucks, such as a forklift: First, a forward drive must be carried out, in which the fork is pushed under the pallet, then the fork and at the same time the pallet on it is lifted, next the pallet is transported to the desired storage location by driving forwards or backwards, where it is finally deposited by lowering the fork. A counting pulse occurs only after a cycle has been completed. Furthermore, maneuvering movements of the forklift truck, as may be necessary when pushing the fork under the pallet, have no effect on the work result displayed by the counter, since the first program point of the microprocessor is processed when driving for the first time and regardless of the number of and driving backwards only continues when the next, here second logical step is taken, i.e. the (first) lifting of the fork and consequently also the pallet on it. The relationships just described also apply analogously to the other program items to be processed by the microprocessor. As a result, the change in the status of the counter gives a direct measure of the number of transports carried out and thus the work performed. This enables direct control and a fair assessment of the work performed.

Um die Möglichkeit der Manipulation des Zählgerätes durch Vortäuschen von fiktiven Arbeitsvorgängen weiter zu reduzieren, wird in einer Weiterbildung vorgeschlagen, dass eine Zählung bzw. die Abgabe eines Zählimpulses nur dann erfolgt, wenn die Durchführungszeit eines einzigen Zyklus grösser ist als eine einstellbare Mindestzeit. Man kann auf diesem Wege unterbinden, dass die Bedienungsperson des Flurförderers durch «Trockenfahren», also durch Hintereinanderreihen der Einzelaktionen eines Zyklus ohne dabei Waren zu bewegen, einen Zählimpuls auslösen kann, sofern die eingestellte Zeit oberhalb der mindestens benötigten Arbeitszeit liegt. Eine andere unabhängig und zusätzlich hiervon realisierbare Möglichkeit berücksichtigt nur solche Zyklen, deren Gesamtzeit unterhalb einer ebenfalls einstellbaren Maximalzeit liegt. Auf diese Weise wird eine Kontrolle oder sogar Druck auf die Bedienungsperson ausgeübt, da Transporte, die zulange dauern, nicht gutgeschrieben werden und bei derZählung unberücksichtigt bleiben. Sowohl Mindest- als auch Maximalzeit sollen einstellbar sein, damit bei einem Einsatz des Flurförderzeuges in einem anderen Bereich oder zu einem anderen Zweck eine Veränderung und Anpassung der oberen und/oder unteren Zeitschranke vorgenommen werden kann.In order to further reduce the possibility of manipulating the counting device by pretending fictitious work processes, it is proposed in a further development that counting or delivery of a counting pulse only takes place if the execution time of a single cycle is greater than an adjustable minimum time. In this way it can be prevented that the operator of the industrial truck can trigger a counting pulse by «driving dry», that is, by lining up the individual actions of a cycle without moving goods, provided the set time is above the minimum required working time. Another possibility that can be implemented independently and in addition to this only takes into account those cycles whose total time is below a likewise adjustable maximum time. In this way, control or even pressure is placed on the operator because long transports are not credited and are disregarded in the count. Both the minimum and maximum time should be adjustable so that when the industrial truck is used in a different area or for a different purpose, the upper and / or lower time limit can be changed and adapted.

In einer Weiterbildung wird noch vorgeschlagen, dass der Geber seine Ansteuerungen durch einen leistungsfreien Potentialabgriff am elektrischen Bedienungssystem erfährt. Im Hinblick auf die bauliche Realisierung stellt dies eine der einfachsten und billigsten Lösungen dar.In a further development, it is also proposed that the encoder be controlled by a power-free potential tap on the electrical operating system. In terms of construction, this is one of the simplest and cheapest solutions.

Nachfolgend wird die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert. Es zeigt das erfindungsgemässe Zählgerät für ein Flurförderzeug in perspektivischer Darstellung.The invention is explained in more detail below on the basis of an exemplary embodiment shown in the drawing. It shows the counting device according to the invention for an industrial truck in a perspective view.

Das dargestellte Zählgerät 1 besteht in seinem grundsätzlichen Aufbau aus einem Gehäuse 2 und einem Kabel 3. Das im wesentlichen rechteckförmige Gehäuse 2 ist an seiner Stirnseite mit einem von aussen sichtbaren Zählwerk 4 ausgestattet. Im gezeigten Ausführungsbeispiel ist daneben eine Sicherung 5 sowie eine Kontrolleuchte 6 angebracht, welche wie üblich bei am Gerät anliegender Spannung aufleuchtet, um die Betriebsbereitschaft anzuzeigen. Im Inneren des Gehäuses 2 ist das Kernstück des erfindungsgemässsen Zählgerätes 1 in Form eines Mikroprozessors eingebaut, der seine Informationen sowie Energieversorgung über das Kabel 3 von aussen erhält und der entsprechend seiner Programmierung und auf Grund der über das Kabel 3 zugeführten Signale die Steuerung des Zählgerätes 1 und insbesonders auch des Zählwerkes 4 vornimmt.The counting device 1 shown consists in its basic structure of a housing 2 and a cable 3. The essentially rectangular housing 2 is equipped on its front side with a counter 4 visible from the outside. In the exemplary embodiment shown, a fuse 5 and a control lamp 6 are attached, which, as usual, light up when the device is connected to voltage in order to indicate that it is ready for operation. The core of the counting device 1 according to the invention is installed in the interior of the housing 2 in the form of a microprocessor, which receives its information and energy supply via the cable 3 from the outside and which controls the counting device 1 according to its programming and on the basis of the signals supplied via the cable 3 and in particular also of the counter 4.

Das Kabel 3 besteht im gezeigten Fall aus insgesamt sechs Phasen, wobei die beiden rechten Phasen 7 dem Anschluss an eine Energiequelle zur Versorgung mit elektrischer Energie dienen. Die übrigen vier Phasen 8 werden jeweils mit einem hier nicht gezeigten und im Flurförderzeug befindlichen Geber elektrisch leitend verbunden. So wird im gezeigten Fall die Phase 8a mit dem die Vorwärtsfahrt des Flurförderzeuges registrierenden Geber verbunden, die Phase 8b mit dem das Heben des Lastaufnahmemittels erfassenden Geber und die Phase 8c mit dem die Vor- oder Rückwärtsfahrt aufnehmenden Geber und schliesslich die vierte Phase 8d mit dem durch das Senken des Lastaufnahmemittels angesteuerten Geber in Verbindung zu bringen. Hierzu sind an das Ende der Phasen 7, 8 Steckverbindungen 9 angebracht.In the case shown, the cable 3 consists of a total of six phases, the two phases 7 on the right serving to connect to an energy source for supplying electrical energy. The remaining four phases 8 are each electrically conductively connected to a sensor (not shown here) located in the industrial truck. In the case shown, phase 8a is connected to the encoder that registers the forward movement of the industrial truck, phase 8b to the encoder that detects the lifting of the load handler, and phase 8c to the encoder that receives the forward or reverse movement, and finally the fourth phase 8d to the to connect the controlled encoder by lowering the load handler. For this purpose, plug connections 9 are attached to the end of phases 7, 8.

Die Benutzung geschieht in der Weise, dass das gezeigte Zählgerät 1 zunächst in das Flurförderzeug eingebracht und die beiden Phasen 7 mit der elektrischen Energieversorgung und die vier Phasen 8 mit den jeweiligen Gebern verbunden werden. Wenn zu Beginn eines Transportes und damit auch eines Zyklus das Flurförderzeug sich nach vorwärts in Bewegung setzt, um beispielsweise die Gabel unter die zu transportierende Palette zu schieben, gibt der zugehörige Geber 8 auf die Phase 8a ein Signal, das den ersten Schritt des zu durchlaufenden Zyklus schaltet. Werden anschliessend beispielsweise durch Rangiermanöver mehrere Vorwärtsfahrten ausgeführt, werden diese vom Mikroprozessor unterdrückt. Erst dann, wenn die nächste Einzelaktion, nämlich das Anheben des Lastaufnahmemittels, erfolgt, ist der zweite Schritt des Zyklus erreicht. Auch hier ist es ohne Bedeutung, ob das Heben der Last kontinuierlich oder in mehreren Etappen geschieht, da mehrere Signale ebenfalls durch den Mikroprozessor unterdrückt werden. Erst wenn eine Vor- oder Rückwärtsfahrt erfolgt, wird der dritte Schritt des Zyklus erreicht, wobei auch hier ohne Bedeutung ist, wieviel Fahrbewegungen im einzelnen vorgenommen werden. Ein Weiterschalten und ein Erreichen der vierten und letzten Einzelaktion ergibt sich durch das Absenken der Lastaufnahmemittel. Der im vorigen Fall aus vier Einzelaktionen bestehende Zyklus ist damit vollständig durchlaufen, was den Zählimpuls auslöst, durch den das Zählwerk weitergeschaltet wird. Die Veränderung des Standes des Zählwerkes 4 gibt unmittelbar die Anzahl der jeweils durchgeführten Transporte an. Auf diese Weise erhält man ein Zählgerät für ein Flurförderzeug, welches eine konkrete Leistungskontrolle und auch gerechte Entlohnung ermöglicht und dabei gleichzeitig ein hohes Mass an Sicherheit vor Missbrauch bietet.They are used in such a way that the counting device 1 shown is first introduced into the industrial truck and the two phases 7 are connected to the electrical power supply and the four phases 8 are connected to the respective sensors. If, at the start of a transport and thus also a cycle, the industrial truck starts to move forward, for example to push the fork under the pallet to be transported, the associated transmitter 8 gives a signal to phase 8a which indicates the first step of the process to be carried out Cycle switches. If several forward movements are subsequently carried out, for example, by maneuvering, these are suppressed by the microprocessor. The second step of the cycle is only reached when the next individual action, namely lifting the load handler, takes place. Again, it does not matter whether the load is lifted continuously or in several stages, since several signals are also suppressed by the microprocessor. The third step of the cycle is only reached when there is a forward or backward drive, although here it is also of no importance how many driving movements are carried out in detail. Switching on and reaching the fourth and last individual action results from the lowering of the load handler. The cycle consisting of four individual actions in the previous case has thus been completed, which triggers the counting pulse by which the counter is switched on. The change in the status of the counter 4 directly indicates the number of transports carried out. In this way, you get a counter for an industrial truck, which enables concrete performance monitoring and fair remuneration, while at the same time offering a high degree of security against misuse.

Claims (4)

1. Industrial truck consisting of a chassis and load-receiving means fastened thereupon, wherein a counting mechanism (1) that counts the work operations, is in connection with at least one detector, which registers the forward and/or reverse travel and at least one additional detectorthat registers the raising and/or lowering of said load-receiving means, the control of said counting device is effected by a microprocessor, which connects the detector signals for the individual actions of said industrial conveyor, whereby after one individual action further individual actions of the same kind within a cyclical work process are not considered,
and a count of said cyclical work process is made only after complection of said cycle.
2. Industrial truck according to claim 1, comprising at least four detectors, of which one registers the forward travel, another the lifting of said load-receiving means, a third the forward or reverse travel, and the fourth the lowering, and which form the cycle composed of four individual actions in this sequence.
3. Industrial truck according to claim 1 or 2, wherein a count is only made if the overall time for said cycle does not exceed an adjustable maximum time and/or does not fall below an adjustable minimum time.
4. Industrial truck according to claim 1 to 3, wherein a powerless pick-off at the electrical operating system results from the detector.
EP86104790A 1985-04-29 1986-04-08 Industrial truck with a counting device Expired EP0200039B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86104790T ATE38731T1 (en) 1985-04-29 1986-04-08 FORKLIFT TRUCK WITH A COUNTER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3515422 1985-04-29
DE19853515422 DE3515422A1 (en) 1985-04-29 1985-04-29 FORKLIFT WITH A COUNTER

Publications (2)

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EP0200039A1 EP0200039A1 (en) 1986-11-05
EP0200039B1 true EP0200039B1 (en) 1988-11-17

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EP86104790A Expired EP0200039B1 (en) 1985-04-29 1986-04-08 Industrial truck with a counting device

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EP (1) EP0200039B1 (en)
AT (1) ATE38731T1 (en)
DE (2) DE3515422A1 (en)

Cited By (1)

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DE29501258U1 (en) * 1995-01-27 1995-03-09 Breest, Ernst-Jürgen, 90547 Stein Cleaning device, especially wiping or scrubbing mop

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Publication number Priority date Publication date Assignee Title
US4757712A (en) * 1987-06-01 1988-07-19 Alert-O-Brake Systems, Inc. Electric monitoring system for load handling vehicles
US4949263A (en) * 1987-06-01 1990-08-14 Alert-O-Brake Systems Inc. Load handling vehicle monitoring system
DE19922137A1 (en) * 1999-05-12 2000-11-16 Still & Saxby Sarl Industrial truck with a battery pack
US7992686B2 (en) * 2008-07-10 2011-08-09 The Raymond Corporation Pallet counter for lift truck

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DE3035810C2 (en) * 1980-09-23 1986-12-18 Bergwerksverband Gmbh, 4300 Essen Data storage device for use in underground mining
US4395624A (en) * 1980-11-03 1983-07-26 Fleet Tech, Inc. Moving vehicle monitoring system
JPS57158696U (en) * 1981-03-31 1982-10-05

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Publication number Priority date Publication date Assignee Title
DE29501258U1 (en) * 1995-01-27 1995-03-09 Breest, Ernst-Jürgen, 90547 Stein Cleaning device, especially wiping or scrubbing mop

Also Published As

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DE3515422A1 (en) 1986-10-30
EP0200039A1 (en) 1986-11-05
DE3661230D1 (en) 1988-12-22
ATE38731T1 (en) 1988-12-15

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