EP1232994B1 - Totmannschalter für ein Flurförderzeug - Google Patents
Totmannschalter für ein Flurförderzeug Download PDFInfo
- Publication number
- EP1232994B1 EP1232994B1 EP02000478A EP02000478A EP1232994B1 EP 1232994 B1 EP1232994 B1 EP 1232994B1 EP 02000478 A EP02000478 A EP 02000478A EP 02000478 A EP02000478 A EP 02000478A EP 1232994 B1 EP1232994 B1 EP 1232994B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- switch
- actuating
- spring
- operator
- actuating surface
- 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
- 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
- B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
- B66F17/003—Safety devices, e.g. for limiting or indicating lifting force for fork-lift trucks
-
- 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
Definitions
- the invention relates to a deadman switch for a truck with one of a Operator against the force of a return spring operable actuating surface and an electrical switch, wherein the electrical switch Actuator having a defined by means of a switch spring Has rest position and by means of the actuating surface against the force of Switch spring is movable in a forced position.
- the electrical switch Actuator having a defined by means of a switch spring Has rest position and by means of the actuating surface against the force of Switch spring is movable in a forced position.
- Deadman switches ensures that the drive of the truck only then can be switched on when an operator is at the driver's station and actively activates the deadman switch. When the operator releases the Driver's seat leaves or releases the dead man's switch for another reason, the drive of the truck switches off automatically.
- the deadman switch is usually by the operator to press the foot.
- the deadman switch has for this purpose an actuating surface on, with the foot pressed down against the force of a return spring can be.
- the actuating surface is mechanically with the actuating element of a connected to the electrical switch so that the electrical switch at a Depressing the actuating surface changes its switching position.
- the Actuator of the electrical switch is connected to a switch spring, which defines a rest position of the actuating element. By means of the actuating surface can the actuating element against the force of the switching spring in a Forced position are kept.
- the actuating surface can be directly or indirectly, e.g. via a lever, act on the actuator.
- the electric Switch only signals the presence of an operator when the Operator actually presses the actuating surface.
- damage or malfunction e.g. a line break or gluing of switch contacts, no unsafe condition of the truck cause.
- the actuator of the electric switch is actuated Actuating surface of the switch spring held in the rest position. At in Resting position located actuator signaled the electrical switch thus the presence of an operator.
- the safety of the truck is further improved when the electric Switch is open in the forced position of the actuating element. In the Forced position in which the actuator in absent operator is located, the electrical circuit is thus interrupted. In case of a line break in one to the deadman switch leading line, in which the electric circuit also is interrupted, switching on the drive of the truck is not possible. Under no circumstances can a line break lead to the drive of the truck can be switched on, although no driver is present.
- the Return spring is redundant.
- the force of the return spring does not move pressed actuating surface upwards and simultaneously moves the Actuator of the electric switch against the force of the switch spring in the forced position.
- the return spring is designed so that its force sufficient, if necessary, to glued contacts of the electrical switch tear apart and with an absent operator the electrical circuit to interrupt. The redundancy of the return spring is required to perform the function of Deadman switch to ensure even with the breakage of a return spring.
- the figure shows a deadman switch according to the invention in longitudinal section.
- an actuating surface 1 which is about an axis 2 on a housing 3 of the Deadman switch is pivotally mounted.
- the actuating surface 1 is in the after depressed position shown below while pressing through a Operator assumes.
- the upper position 4, which the actuating surface. 1 for example, occupies during the absence of the operator is with shown in dotted lines.
- the actuating surface 1 is parallel by means of two arranged, redundant return springs 5 biased to its upper position 4.
- the Return springs are dimensioned such that a single return spring 5 the full functionality of the deadman switch guaranteed.
- the deadman switch comprises an electrical switch 6, which is not shown electrical lines, for example, with a central control of a Truck is connected. Inside the electrical switch 6 are not shown electrical contacts by moving a Actuator 7 can be opened or closed.
- the Actuator 7 is by means of a switch spring, not shown in the shown biased position and can against the force of the switch spring in the Drawing to be moved to the right.
- the electrical switch 6 is as Positively operated opener. This means that the electrical contacts of the switch 6 are closed in the illustrated position of the actuating element 7, and at against the force of the switch spring to the right shifted actuator. 7 are open.
- the displacement of the actuating element 7 of the electrical switch 6 via a toggle lever 8 which is pivotable about an axis 9 on the housing 3 of the Deadman switch is stored.
- the toggle lever 8 is a on the toggle lever. 8 mounted sliding roller 10 pivoted, which at one of the actuating surface. 1 arranged slope 11 rolls.
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Transportation (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Civil Engineering (AREA)
- Mechanisms For Operating Contacts (AREA)
- Push-Button Switches (AREA)
- Forklifts And Lifting Vehicles (AREA)
Description
Claims (6)
- Totmannschalter für ein Flurförderzeug mit einer von einer Bedienperson entgegen der Kraft einer Rückstellfeder (5) betätigbaren Betätigungsfläche (1) und einem elektrischen Schalter (6), wobei der elektrische Schalter (6) ein Betätigungselement (7) aufweist, das eine mittels einer Schalterfeder definierte Ruhestellung aufweist und mittels der Betätigungsfläche (1) entgegen der Kraft der Schalterfeder in eine Zwangsstellung bewegbar ist, dadurch gekennzeichnet, dass das Betätigungselement (7) des elektrischen Schalters (6) bei nicht betätigter Betätigungsfläche (1) von der Betätigungsfläche (1) in der Zwangsstellung gehalten wird.
- Totmannschalter nach Anspruch 1, dadurch gekennzeichnet, dass das Betätigungselement (7) des elektrischen Schalters (6) bei betätigter Betätigungsfläche (1) von der Schalterfeder in der Ruhestellung gehalten wird.
- Totmannschalter nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der elektrische Schalter (6) in der Zwangsstellung des Betätigungselements (7) geöffnet ist.
- Totmannschalter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der elektrische Schalter (6) in der Ruhestellung des Betätigungselements (7) geschlossen ist.
- Totmannschalter nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Rückstellfeder (5) redundant ausgeführt ist.
- Totmannschalter nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Betätigungsfläche (1) von der Bedienperson mit dem Fuß betätigbar ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10103536 | 2001-01-26 | ||
DE10103536A DE10103536A1 (de) | 2001-01-26 | 2001-01-26 | Totmannschalter für ein Flurförderzeug |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1232994A2 EP1232994A2 (de) | 2002-08-21 |
EP1232994A3 EP1232994A3 (de) | 2003-08-13 |
EP1232994B1 true EP1232994B1 (de) | 2005-03-30 |
Family
ID=7671851
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02000478A Expired - Lifetime EP1232994B1 (de) | 2001-01-26 | 2002-01-08 | Totmannschalter für ein Flurförderzeug |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1232994B1 (de) |
DE (2) | DE10103536A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005006855A1 (de) | 2005-02-15 | 2006-08-17 | Om Carrelli Elevatori S.P.A. | Flurförderzeug mit einem Lenkgeber |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2974764A (en) * | 1958-04-01 | 1961-03-14 | Elwell Parker Electric Co | Industrial truck braking system |
US3788431A (en) * | 1972-08-10 | 1974-01-29 | Clark Equipment Co | Seat safety brake control system |
GB2289669B (en) * | 1994-05-20 | 1997-12-17 | Lansing Linde Ltd | Industrial lift trucks |
DE19743735B4 (de) * | 1997-10-02 | 2009-08-06 | Linde Material Handling Gmbh | Flurförderzeug mit einem Fahrerstand zum Bremsen eines solchen Flurförderzeugs |
-
2001
- 2001-01-26 DE DE10103536A patent/DE10103536A1/de not_active Withdrawn
-
2002
- 2002-01-08 DE DE50202598T patent/DE50202598D1/de not_active Expired - Fee Related
- 2002-01-08 EP EP02000478A patent/EP1232994B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE50202598D1 (de) | 2005-05-04 |
EP1232994A2 (de) | 2002-08-21 |
DE10103536A1 (de) | 2002-08-01 |
EP1232994A3 (de) | 2003-08-13 |
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