WO1979000330A1 - Inclination indicator for gripping means on loading machines - Google Patents
Inclination indicator for gripping means on loading machines Download PDFInfo
- Publication number
- WO1979000330A1 WO1979000330A1 PCT/SE1978/000085 SE7800085W WO7900330A1 WO 1979000330 A1 WO1979000330 A1 WO 1979000330A1 SE 7800085 W SE7800085 W SE 7800085W WO 7900330 A1 WO7900330 A1 WO 7900330A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- indicator
- gripping means
- inclination
- sensor
- fork
- Prior art date
Links
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
- 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
- B66F9/08—Masts; Guides; Chains
- B66F9/082—Masts; Guides; Chains inclinable
Definitions
- the present invention relates to an inclination indicator for loading machines having gripping means which are adjustable to an arbitrary angle of inclination in relation to a reference plane, for instance the fork on a fork truck.
- the purpose of this is to enable the driver of the loading machine to adjust the inclination of the gripping means to a position which is most suitable for gripping the go ⁇ ds.
- the fork When loading piled goods as boards with a fork truck the fork is entered into spaces in the pile of goods. It is then important that the fork has the same inclination as the spaces, or otherwise the fork may damage the boards where it is entered.
- the clamping means When loading cylindrical objects as paper rolls with a clamping truck, the clamping means bearing on the cylindrical surface of the roll, it is important that the contact of the clamping means with the roll is parallel to the axis of the roll. If the clamping occurs at an angle to the axis the roll is damaged by the shearing in the outer layers of the roll which is caused when the roll during .the continued clamping movement strives to turn towards a position where the axis of the roll is parallel to the clamping contact line.
- an inclination indicator suitably of an electronic type, consisting of a sensor, for instance a potentiometer, which detects the angular position of the fork in relation to a reference plane, for instance the plane defined by the supporting surfaces of the wheels, and a pointer which shows the position detected by the sensor.
- Fig. 1 shows a fork lift truck with a fork for piece goods or piled goods and an inclination indicator according to the invention.
- Fig. 2 shows a clamping truck with clamping means for gripping a paper roll or similar and an inclination indicator according to the invention. The figure shows the clamping means in their correct position.
- Fig. 3 shows the same clamping truck as in Fig. 2 but with the clamping means in an incorrect position.
- the truck 10 shown i Fig. 1 is in a known way provided with a fork 11 which is vertically adjustable on a lifting frame 12.
- the fork is placed at 90 angle to the frame.
- the frame can be inclined to different angles and in the figure an inclination forwards is marked xo and an inclination rearwards is marked yo.
- the angles are related to the line 15 which is perpendicular to the plane 16 of the ground.
- the lifting frame is inclined a certain angle forwards or rearwards the fork 11 is inclined by the same angle downwards respectively upwards in relation to the plane 16 of the ground, the plane 16 thus being the reference plane for the inclination of the fork.
- the inclination of the frame and the fork is detected by the sensor 13 and registered on the pointer device 14, so that the truck driver can adjust the fork to the desired position.
- the horizontal position is used when the fork is entered between the boards in a pile, an inclination upwards is used in order to prevent the goods from sliding off, and an inclination downwards is used for unloading.
- Figs. 2 and 3 show another type of loading machine, a truck with a clamping device for gripping objects.
- the clamping device has two clamping arms 20 adapted to grip on opposite sides of a paper roll 21 placed with its axis vertically.
- Fig. 2 shows the clamping device adjusted to the correct angular position so that the clamping contact surfaces of the clamping arms are parallel to the axis of the paper roll and thus bear on the surface of the roll.
- Fig. 3 shove an incorrect angle of the gripping device, which results in a point contact between the clamping surfaces and the paper roll, with subsequent damage on the roll at the contact points.
- the ground is the reference plane.
- the indicator will thus register the inclination in relation to the sloping plane. If instead it is desired to register a horzontal position independently of the possible inclination of the truck, this can be achieved by means of a plummet device to which the indicator is related.
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Earth Drilling (AREA)
- Sowing (AREA)
Abstract
Inclination indicator (14) for loading machines (10) having gripping means (11, 20) which are adjustable to an arbitrary angle of inclination in relation to a reference plane (16). The gripping means (11, 20) can be for instance the fork (11) on a fork lift truck (10) or the clamping means (20) on a clamping lift truck (10). The purpose of this is to enable the driver of the loading machine (10) to adjust the inclination of the gripping means (11, 20) to a position which is most suitable for gripping or other handling of the goods (21).
Description
Inclination indicator for gripping means on loading machines
The present invention relates to an inclination indicator for loading machines having gripping means which are adjustable to an arbitrary angle of inclination in relation to a reference plane, for instance the fork on a fork truck. The purpose of this is to enable the driver of the loading machine to adjust the inclination of the gripping means to a position which is most suitable for gripping the goσds.
When loading piled goods as boards with a fork truck the fork is entered into spaces in the pile of goods. It is then important that the fork has the same inclination as the spaces, or otherwise the fork may damage the boards where it is entered.
When loading cylindrical objects as paper rolls with a clamping truck, the clamping means bearing on the cylindrical surface of the roll, it is important that the contact of the clamping means with the roll is parallel to the axis of the roll. If the clamping occurs at an angle to the axis the roll is damaged by the shearing in the outer layers of the roll which is caused when the roll during .the continued clamping movement strives to turn towards a position where the axis of the roll is parallel to the clamping contact line.
In both these cases there is a great risk of damaging the goods because the inclination of the clamping means can not be judged with sufficient accuracy from the driver's seat.
The present invention solves this problem by means of an inclination indicator, suitably of an electronic type, consisting of a sensor, for instance a potentiometer, which detects the angular position of the fork in relation to a reference plane, for instance the plane defined by the supporting surfaces of the wheels, and a pointer which shows the position detected by the sensor.
The invention is described more in particular in the following specification with appended drawings showing the following:
Fig. 1 shows a fork lift truck with a fork for piece goods or piled goods and an inclination indicator according to the invention.
Fig. 2 shows a clamping truck with clamping means for gripping a paper roll or similar and an inclination indicator according to the invention. The figure shows the clamping means in their correct position.
Fig. 3 shows the same clamping truck as in Fig. 2 but with the clamping means in an incorrect position. The truck 10 shown i Fig. 1 is in a known way provided with a fork 11 which is vertically adjustable on a lifting frame 12. The fork is placed at 90 angle to the frame. The frame can be inclined to different angles and in the figure an inclination forwards is marked xº and an inclination rearwards is marked yº. The angles are related to the line 15 which is perpendicular to the plane 16 of the ground. When the lifting frame is inclined a certain angle forwards or rearwards the fork 11 is inclined by the same angle downwards respectively upwards in relation to the plane 16 of the ground, the plane 16 thus being the reference plane for the inclination of the fork.
The inclination of the frame and the fork is detected by the sensor 13 and registered on the pointer device 14, so that the truck driver can adjust the fork to the desired position. The horizontal position is used when the fork is entered between the boards in a pile, an inclination upwards is used in order to prevent the goods from sliding off, and an inclination downwards is used for unloading.
Figs. 2 and 3 show another type of loading machine, a truck with a clamping device for gripping objects. In the illustrated case the clamping device has two clamping arms 20 adapted to grip on opposite sides of a paper roll 21 placed with its axis vertically. Fig. 2 shows the clamping device adjusted to the correct angular position so that the clamping contact surfaces of the clamping arms are parallel to the axis of the paper roll and thus bear on the surface of the roll. Fig. 3 shove an incorrect angle of the gripping
device, which results in a point contact between the clamping surfaces and the paper roll, with subsequent damage on the roll at the contact points.
In the described examples it is assumed that the ground is the reference plane. In case the truck stands on a sloping ground the indicator will thus register the inclination in relation to the sloping plane. If instead it is desired to register a horzontal position independently of the possible inclination of the truck, this can be achieved by means of a plummet device to which the indicator is related.
In the examples described it is shown how the angular position of the gripping means is adjusted by changing the position of the lifting frame in relation to the truck. Naturally this adjustment can also be made by making the gripping means angularly adjustable in relation to the lifting frame.
Claims
1. Incl nation indicator for loading machines having gripping means which are adjustable to an arbitrary angle of inclination in relation to a reference plane, characterize in that the indicator comprises a sensor (13) adapted to detect the inclination of the gripping means ( 1 1 , 20 ) in relation to the reference plane (16) and a pointer device (14) connected to said sensor (13) and adapted to show said inclination at a place visible to the truck driver.
2. Indicator as defined in claim 1, characterized in that the reference plane (16) is the ground.
3. Indicator as defined in claim 1, characterized in that the reference plane is a horizontal plane.
4. Indicator as defined in any preceding claim, characterized in that the gripping means are vertically adjustable.
5. Indicator as defined in any preceding claim, characterized in that the gripping means are a fork.
6. Indicator as defined in any of claims 1 to 4, characterized in that the gripping means are a clamping device.
7. Indicator as defined in any preceding claim, characterized in that the device is electronic.
Claims
1. Indicator for the inclination of gripping means on loading trucks, said gripping means being vertically adjustable and also adjustable to an arbitrary angle of inclination in relation to the truck, characterized in that the indicator is electronic and comprises a sensor (13) adapted to continuously register the angular position of the gripping means (11, 20) in relation to the truck, a gauge (1h) connected to said sensor and having a pointer adapted to continuously follow the position indicated by the sensor, the gauge (14) further having a dial mark indicating the position which corresponds to the position of the gripping means (11, 20) parallel to the plane defined by the contact surfaces of the wheels, the gauge being visible from the driver's seat. 2. Indicator as defined in claim 1, characterized in that the gripping means are a fork (11).
3. Indicator as defined in claim 1, characterized in that the gripping means are a clamping device (20).
4. Indicator as defined in any of the preceding claims, characterized in that the sensor (13) is a potentiometer.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE782857209T DE2857209A1 (en) | 1977-11-30 | 1978-11-28 | INCLINATION INDICATOR FOR GRIPPING MEANS ON LOADING MACHINES |
| JP50013378A JPS54500054A (en) | 1977-11-30 | 1978-11-28 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7713553 | 1977-11-30 | ||
| SE7713553A SE415018B (en) | 1977-11-30 | 1977-11-30 | INDICATOR FOR DISPOSAL OF THE SLIP OF THE GRIP ORGAN ON A FORK TRUCK |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1979000330A1 true WO1979000330A1 (en) | 1979-06-14 |
Family
ID=20333053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/SE1978/000085 WO1979000330A1 (en) | 1977-11-30 | 1978-11-28 | Inclination indicator for gripping means on loading machines |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0007967A1 (en) |
| JP (1) | JPS54500054A (en) |
| DE (1) | DE2857209A1 (en) |
| DK (1) | DK541478A (en) |
| ES (1) | ES475531A1 (en) |
| FR (1) | FR2491904A1 (en) |
| GB (1) | GB2035955A (en) |
| NL (1) | NL7811653A (en) |
| NO (1) | NO784016L (en) |
| SE (1) | SE415018B (en) |
| WO (1) | WO1979000330A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993017952A1 (en) * | 1992-03-09 | 1993-09-16 | Pekka Kolari | A mast centering device for a lift truck |
| DE4218269A1 (en) * | 1992-06-03 | 1993-12-09 | Juergen Sinn | Fork lift truck fork angle indicating appts. - has rotatable shaft with plate attached to one end of Bowden cable connected to lifting mast |
| GB2285250A (en) * | 1993-12-29 | 1995-07-05 | Samsung Heavy Ind | Tilt angle sensor |
| DE10028808A1 (en) * | 2000-06-15 | 2002-01-03 | Martin Pfeil Trawid Gmbh | Lifting truck for lifting and maneuvering goods like rolls of paper uses a sensor mechanism for instantaneous tilting and/or acceleration of a holding device. |
| US6431816B1 (en) * | 1998-10-07 | 2002-08-13 | Cascade Corporation | Adaptive load-clamping system |
| EP1426205A2 (en) | 2002-12-04 | 2004-06-09 | Jungheinrich Aktiengesellschaft | Four-wheeled lift truck with oscillating axle |
| US6829835B2 (en) | 2002-11-21 | 2004-12-14 | Martin Pfeil Trawid-Gmbh | Lifting vehicle |
| DE10305900B4 (en) * | 2003-02-13 | 2007-04-05 | Jungheinrich Aktiengesellschaft | forklifts |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI96503C (en) * | 1994-08-26 | 1996-07-10 | Hymatic Ltd Oy | Method and apparatus for controlling a mast |
| GB0327240D0 (en) * | 2003-11-02 | 2003-12-24 | Cheesman John F | Fork lift truck monitor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2972194A (en) * | 1959-04-17 | 1961-02-21 | Raymond E Ewing | Blade cutting angle indicator |
| SE334752B (en) * | 1969-06-23 | 1971-05-03 | Bolinder Munktell | |
| GB1258081A (en) * | 1968-01-19 | 1971-12-22 | ||
| SE371173B (en) * | 1971-08-26 | 1974-11-11 | Massey Ferguson Inc | |
| US3984918A (en) * | 1974-10-02 | 1976-10-12 | Sun Oil Company (Delaware) | Inclinometer |
| GB1491345A (en) * | 1974-02-19 | 1977-11-09 | Towmotor Corp | Fork position indicator for a lift truck |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3534355A (en) * | 1967-03-28 | 1970-10-13 | Dole Valve Co | Load warning device |
| US3893093A (en) * | 1973-07-25 | 1975-07-01 | Forney International | Crane boom angle indication and warning system |
| US3865265A (en) * | 1973-08-20 | 1975-02-11 | Brudi Equipment | Lift truck safety accessory |
-
1977
- 1977-11-30 SE SE7713553A patent/SE415018B/en unknown
-
1978
- 1978-11-28 WO PCT/SE1978/000085 patent/WO1979000330A1/en unknown
- 1978-11-28 GB GB7924583A patent/GB2035955A/en not_active Withdrawn
- 1978-11-28 NL NL7811653A patent/NL7811653A/en not_active Application Discontinuation
- 1978-11-28 DE DE782857209T patent/DE2857209A1/en not_active Ceased
- 1978-11-28 JP JP50013378A patent/JPS54500054A/ja active Pending
- 1978-11-29 ES ES475531A patent/ES475531A1/en not_active Expired
- 1978-11-29 NO NO784016A patent/NO784016L/en unknown
- 1978-11-30 DK DK541478A patent/DK541478A/en not_active Application Discontinuation
-
1979
- 1979-06-19 EP EP78900296A patent/EP0007967A1/en not_active Withdrawn
-
1981
- 1981-02-26 FR FR8104161A patent/FR2491904A1/en active Granted
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2972194A (en) * | 1959-04-17 | 1961-02-21 | Raymond E Ewing | Blade cutting angle indicator |
| GB1258081A (en) * | 1968-01-19 | 1971-12-22 | ||
| SE334752B (en) * | 1969-06-23 | 1971-05-03 | Bolinder Munktell | |
| SE371173B (en) * | 1971-08-26 | 1974-11-11 | Massey Ferguson Inc | |
| GB1491345A (en) * | 1974-02-19 | 1977-11-09 | Towmotor Corp | Fork position indicator for a lift truck |
| US3984918A (en) * | 1974-10-02 | 1976-10-12 | Sun Oil Company (Delaware) | Inclinometer |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993017952A1 (en) * | 1992-03-09 | 1993-09-16 | Pekka Kolari | A mast centering device for a lift truck |
| DE4218269A1 (en) * | 1992-06-03 | 1993-12-09 | Juergen Sinn | Fork lift truck fork angle indicating appts. - has rotatable shaft with plate attached to one end of Bowden cable connected to lifting mast |
| GB2285250A (en) * | 1993-12-29 | 1995-07-05 | Samsung Heavy Ind | Tilt angle sensor |
| US6431816B1 (en) * | 1998-10-07 | 2002-08-13 | Cascade Corporation | Adaptive load-clamping system |
| DE10028808B4 (en) * | 2000-06-15 | 2004-07-29 | Martin Pfeil Trawid-Gmbh | lifting vehicle |
| DE10028808A1 (en) * | 2000-06-15 | 2002-01-03 | Martin Pfeil Trawid Gmbh | Lifting truck for lifting and maneuvering goods like rolls of paper uses a sensor mechanism for instantaneous tilting and/or acceleration of a holding device. |
| US6829835B2 (en) | 2002-11-21 | 2004-12-14 | Martin Pfeil Trawid-Gmbh | Lifting vehicle |
| DE10256539A1 (en) * | 2002-12-04 | 2004-06-24 | Jungheinrich Ag | Four-wheel truck with pendulum axle |
| EP1426205A2 (en) | 2002-12-04 | 2004-06-09 | Jungheinrich Aktiengesellschaft | Four-wheeled lift truck with oscillating axle |
| DE10256539B4 (en) * | 2002-12-04 | 2006-02-16 | Jungheinrich Ag | Four-wheel truck with pendulum axle |
| US7137473B2 (en) | 2002-12-04 | 2006-11-21 | Jungheinrich Aktiengesellschaft | Four-wheel industrial truck with a swing axle |
| DE10305900B4 (en) * | 2003-02-13 | 2007-04-05 | Jungheinrich Aktiengesellschaft | forklifts |
| DE10305900C5 (en) * | 2003-02-13 | 2014-04-17 | Jungheinrich Aktiengesellschaft | forklifts |
Also Published As
| Publication number | Publication date |
|---|---|
| ES475531A1 (en) | 1979-05-01 |
| NL7811653A (en) | 1979-06-01 |
| DK541478A (en) | 1979-05-31 |
| FR2491904A1 (en) | 1982-04-16 |
| FR2491904B1 (en) | 1983-04-08 |
| NO784016L (en) | 1979-06-12 |
| SE7713553L (en) | 1979-05-31 |
| GB2035955A (en) | 1980-06-25 |
| EP0007967A1 (en) | 1980-02-20 |
| JPS54500054A (en) | 1979-11-08 |
| DE2857209A1 (en) | 1981-01-08 |
| SE415018B (en) | 1980-09-01 |
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