EP4215473A1 - Verfahren zur handhabung von lasten und lasthandhabungsvorrichtung - Google Patents

Verfahren zur handhabung von lasten und lasthandhabungsvorrichtung Download PDF

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Publication number
EP4215473A1
EP4215473A1 EP22152341.8A EP22152341A EP4215473A1 EP 4215473 A1 EP4215473 A1 EP 4215473A1 EP 22152341 A EP22152341 A EP 22152341A EP 4215473 A1 EP4215473 A1 EP 4215473A1
Authority
EP
European Patent Office
Prior art keywords
load
arms
relation
loader
clamping
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.)
Pending
Application number
EP22152341.8A
Other languages
English (en)
French (fr)
Inventor
Jarkko RANTA
Sauli AALLONRANTA
Jari NYGRÉN
Teemu JAUHIAINEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Auramo Oy
Original Assignee
Auramo Oy
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Auramo Oy filed Critical Auramo Oy
Priority to EP22152341.8A priority Critical patent/EP4215473A1/de
Priority to PCT/EP2023/050421 priority patent/WO2023138946A1/en
Publication of EP4215473A1 publication Critical patent/EP4215473A1/de
Pending legal-status Critical Current

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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
    • B66F9/12—Platforms; Forks; Other load supporting or gripping members
    • B66F9/18—Load gripping or retaining means
    • B66F9/184—Roll clamps
    • 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

Definitions

  • the present invention relates to load handling with a loader, such as lift truck for example. More precisely the invention relates to a method for handling loads by gripping the loads with a load handling device of a loader, which load handling device comprises two or more movable arms for gripping the load from its sides between the arms, and to a such a load handling device.
  • loads and load types There are a plurality of different loads and load types, which are usually handled in warehouses and factories by clamping the loads from their sides.
  • the handling of these kind of loads is typically done with a clamp device connected to a lift truck or other type loader.
  • Typical examples of these kinds of loads are paper rolls and material bales.
  • Similar kind of load handling with clamps or clamping devices is also used in handling of loads packed in boxes, such as home appliances and consumer electronics.
  • the clamp or clamping device is adapted suitable for the dimensions, type, weight, shape and selected handling method of the load.
  • different frame and arm combinations are used for adapting the clamp or clamping device suitable for the dimensions of the load. All of these different combinations typically comprise a contact surface or clamping surface suitable to the load in question, which surface can be a separate part or integral part of the arm.
  • the clamping device needs to have arm structure or construction suitable for that purpose. For example, when a plurality of paper rolls is handled simultaneously, the clamp structure is typically divided to a plurality of sections so that it can used to clamp and handle a plurality of rolls with different diameters at the same time.
  • This visibility problem may lead to accidents if the operator of the loader fails to open the arms of the clamp sufficiently during releasing of the load before starting to move the loader itself.
  • the present invention provides a novel solution for overcoming the above discussed problems.
  • the operator of the loader with a clamping device is informed when the arms of the clamp are sufficiently detached from the load during release of the load, so that the operator knows when the loader can be safely moved.
  • a load handling device connected to a loader
  • which load handling device comprises at least two arms with clamping surfaces for contacting opposite side surfaces of a load and wherein at least one of the at least two arms is movable in relation to the other arm for obtaining the clamping and release operations for the load
  • the distance and/or position of the arms in relation to each other or in relation to the handled load is defined, and during releasing of the load the movement and/or position of the arms in relation to each other or in relation to the handled load is measured, and once defined distance and/or position between the arms or in relation to the handled load is reached, a signal indicating safe movement of the loader is issued.
  • the position of the arms when the load is clamped between the contact surfaces is detected and the clamping position of the arms is defined based on this detection.
  • the detection of the clamping position of the arms can be based on pressure rise in the hydraulic circuit operating the arms, for example, or with other suitable means and ways.
  • the detection of the clamping position of the arms i.e. that the load has been clamped between the arms, can also be indicated to the operator of the loader with suitable light and/or sound alarm, for example.
  • the position of the handled load in relation to the arms is defined, and the distance and/or position between the arms or in relation to the load is defined based on the position information of the handled load.
  • the position of the handled load in relation to the arms preferably comprises measurement of the distance of the surface of the load from a frame part to which frame part at least one of the at least two arms is turnably connected.
  • the indication signal is a sound and/or light signal.
  • the indication signal is a data transfer to other system, such as an external system and/or controller for example, through a dedicated data communication bus, or other digital or analog signal.
  • This data transfer can be used for enabling the use of additional external sensors on the loader to check the surroundings while backing off from the load, and/or visually displaying the clamp and loader positions during backing off from the load, for example.
  • the present invention also provides a load handling device, which device comprises a frame part or frame structure and at least two arms with contact surfaces for clamping a load between the contact surfaces wherein at least one of the arms is turnably connected to the frame part, and which frame part is configured to be connectable to a frame of a loader, wherein the load handling device comprises a device for defining clamping position of the arms and for defining a release position of the arms based on the clamping position of the arms, and a device for creating a signal once the arms are moved from the clamping position to the release position.
  • the load handling device comprises a device for defining the position of the clamped load.
  • FIG 1 shows schematically a loader 1 with a load handling device as a top view, which load handling device is a clamping device 2.
  • the clamping device 2 comprises two arms 3a and 3b, which are connected turnably to the frame part 5 of the clamping device. At the ends of the arms 3a, 3b are contact surfaces 4a, 4b via which the clamping device contacts the load to be handled.
  • the clamping device 2 shown in figure 1 is configured for handling paper rolls, which typically needs to gripped and handled both on horizontal and on vertical orientation, and turned between these orientations. Due to the need of lifting rolls in horizontal orientation from ground and for turning them in vertical orientation for storage, the arm 3a of the clamping device is longer than arm 3b, and the frame part 5 is rotatable in relation to the loader 1 for changing the orientation of the arms 3a, 3b and the load clamped between the arms. However, the arms 3a and 3b may be substantially equally long.
  • Figure 2 shows schematically an embodiment of a load handling device of the present invention, which is a clamping device 2.
  • the clamping device 2 comprises two arms 3a and 3b, which are connected turnably to the frame part 5 of the clamping device. At the ends of the arms 3a, 3b are contact surfaces 4a, 4b via which the clamping device contacts the load to be handled.
  • the clamping device 2 comprises a signal light 8a located at least on the arm 3a, position sensors 8b for defining the positions of the arms 3a and 3b, and a load detecting sensor 8c for detecting presence of a load and for defining distance from a surface of the load to the front surface of the frame part 5.
  • position sensors 8b for both of the arms only single position sensor may also be used, preferably for the longer arm 3a.
  • the signal light 8a may be replaced with any other type signal (such as sound, vibration or data transfer) creating device, or with a combination of these, in the solution of the present invention.
  • FIGS 3A and 3B illustrates schematically an embodiment of the operation of the present invention.
  • Figure 3A shows the situation, where a load 6 is clamped between the contact surfaces 4a, 4b of the arms 3a, 3b of the clamping device 2 of a loader.
  • the load 6 is transferred to a defined place for storage, for example, and the operator of the loader start to release clamping of the load.
  • the load 6 is a relatively small diameter paper roll, for example.
  • the position of the arms 3a, 3b is defined with position sensors 8b when the arms are gripping the load 6. Further, the distance of the closest surface of the load 6 is also defined with the distance sensor 8c. Position of the load 6 is then defined from the position of the arms 3a, 3b, geometry of the arms, and distance measurement from the distance sensor 8c. And based on the stored zero point and position of the arms 3a, 3b, the release position of arm 3a is calculated. In the calculated release position the arm 3a is located sufficient distance away the load 6 so that the contact surface 4a, as well as other parts of the arm 3a, cannot hit the load when the loader equipped with the clamping device 2 is moved away from the load.
  • the signal light 8a starts to blink to indicate that movement of the loader with the clamping device 2 is not allowed.
  • the blinking of signal light 8a stops, which indicates to the operator that it is safe to move the loader from the load 6.
  • the color of the signal light 8a may also change, and different sound alarm may be issued.
  • FIGS 4A and 4B illustrates schematically an alternative embodiment of the operation of the present invention.
  • the handled load 7 is relatively large diameter paper roll, for example.
  • figure 4A shows the situation, where a load 7 is clamped between the contact surfaces 4a, 4b of the arms 3a, 3b of the clamping device 2 of a loader and the load is ready to be released
  • figure 4B shows the position of the arms 3a, 3b of the clamping device 2 for safe movement of the loader when the releasing of the load 7 is completed.
  • Figure 5 shows a functional diagram of a basic embodiment of a system in accordance with the present invention.
  • the operator of the loader activates the system, as indicated in 101, when a clamped load is ready to be released.
  • the indicators such as the signal light 8a, are turned on, as shown in 103. Then the position of arms 3a, 3b is stored as shown in 104, and moving of the arms for releasing the load can be started.
  • the position of arms 3a, 3b is followed and defined, as shown in 105, with position sensors 8b.
  • the safe position of the arms 3a, 3b is reached, as shown in 106, indicators are turned off, as shown in 107, which indicates to the operator that the loader can be safely moved away from the load, and the system returns to wait for a new activation.
  • Figure 6 shows a functional diagram of an advanced embodiment of a system in accordance with the present invention.
  • the system of figure 6 When the system of figure 6 is activated, as shown in 201, either manually by the operator of a loader or automatically by suitable signal or operation, the system proceeds to a short wait, as shown in 202, before proceeding to load detection as shown in 203 and 204.
  • the load detection in 203 and 204 is based on input from distance sensor 8c, for example.
  • the system proceeds measure arm positions as shown 205.
  • the load gripping is confirmed with a pressure measurement from a hydraulic system moving the arms of the loader, as shown in 206, and the position of arms is updated, if necessary, based on the pressure measurement, as shown in 207.
  • the system proceeds to turn on indicators, such as the signal light 8a, indicating that the release of the load can be started, as shown in 208. Further, the arm positions in gripping position, i.e. the zero point, are stored, as shown in 209.
  • the system Based on the arm positions stored in 209, the system defines the value Z1, which presents the required movement of arms to move them to safe position or point for moving the loader away from the load, as shown in 210.
  • the operator can proceed to move the arms to release the load until the value Z1 is exceeded, as shown in 211-213. Then the operator is allowed to start to move the loader from the released load, which is followed by the system, as shown in 214, until the load has sufficiently far away from the load, that there is no risk of arms colliding the load. After this distance is achieved, the indicators are turned off, as shown in 215, which indicates that the loader can be freely guided to a new load.
  • the system After the indicators are turned off, the system returns to the short wait, as shown in 202, and proceed to the load detection cycle shown in 203 and 204 until a load is again detected at close proximity and gripped by the arms of the loader. This allows the system to be continuously in operation and does not need to be actively started again each time a load is to be released.
  • the solution of the present invention does not require precise measurement of the load itself or the position of the contact surfaces contacting the load for providing the sufficient clearance of the arms and contact surfaces contacting the load.
  • the required electronics and controlling methods can be implemented in much simpler way and economically advantageously than solutions requiring exact position definition of those.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
EP22152341.8A 2022-01-20 2022-01-20 Verfahren zur handhabung von lasten und lasthandhabungsvorrichtung Pending EP4215473A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22152341.8A EP4215473A1 (de) 2022-01-20 2022-01-20 Verfahren zur handhabung von lasten und lasthandhabungsvorrichtung
PCT/EP2023/050421 WO2023138946A1 (en) 2022-01-20 2023-01-10 Method for handling loads and load handling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22152341.8A EP4215473A1 (de) 2022-01-20 2022-01-20 Verfahren zur handhabung von lasten und lasthandhabungsvorrichtung

Publications (1)

Publication Number Publication Date
EP4215473A1 true EP4215473A1 (de) 2023-07-26

Family

ID=80113332

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22152341.8A Pending EP4215473A1 (de) 2022-01-20 2022-01-20 Verfahren zur handhabung von lasten und lasthandhabungsvorrichtung

Country Status (2)

Country Link
EP (1) EP4215473A1 (de)
WO (1) WO2023138946A1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5898378A (en) * 1998-02-09 1999-04-27 Lift-O-Matic Material Handling, Inc. Drum lift indicators and inventory control devices
JPH11335099A (ja) * 1998-05-28 1999-12-07 Toyota Autom Loom Works Ltd ロールクランプ装置
JP2013112425A (ja) * 2011-11-25 2013-06-10 Toyota Industries Corp ロールクランプ装置
US20140121823A1 (en) * 2012-10-29 2014-05-01 Cascade Corporation Interactive clamp force control system for load handling clamps
US20170183042A1 (en) * 2015-12-29 2017-06-29 Toyota Motor Engineering & Manufacturing North America, Inc. Barrel drum transporter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5898378A (en) * 1998-02-09 1999-04-27 Lift-O-Matic Material Handling, Inc. Drum lift indicators and inventory control devices
JPH11335099A (ja) * 1998-05-28 1999-12-07 Toyota Autom Loom Works Ltd ロールクランプ装置
JP2013112425A (ja) * 2011-11-25 2013-06-10 Toyota Industries Corp ロールクランプ装置
US20140121823A1 (en) * 2012-10-29 2014-05-01 Cascade Corporation Interactive clamp force control system for load handling clamps
US20170183042A1 (en) * 2015-12-29 2017-06-29 Toyota Motor Engineering & Manufacturing North America, Inc. Barrel drum transporter

Also Published As

Publication number Publication date
WO2023138946A1 (en) 2023-07-27

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