WO2022036423A1 - Device for replacing return rollers and method for replacing return rollers - Google Patents

Device for replacing return rollers and method for replacing return rollers Download PDF

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Publication number
WO2022036423A1
WO2022036423A1 PCT/BR2021/050306 BR2021050306W WO2022036423A1 WO 2022036423 A1 WO2022036423 A1 WO 2022036423A1 BR 2021050306 W BR2021050306 W BR 2021050306W WO 2022036423 A1 WO2022036423 A1 WO 2022036423A1
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WO
WIPO (PCT)
Prior art keywords
roller
return
support
roller support
fixed
Prior art date
Application number
PCT/BR2021/050306
Other languages
French (fr)
Portuguese (pt)
Inventor
Fabiano de Souza SILVA
Renan de Assis ALEXANDRE
Renato TOSTAS
Alcimar Fernandes TOBIAS
William Augusto FARIA
Lucas Alan Pereira FULGENCIO
Rodrigo Paula SOUZA
Original Assignee
Vale S.A.
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 Vale S.A. filed Critical Vale S.A.
Publication of WO2022036423A1 publication Critical patent/WO2022036423A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
    • B60P1/02—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with parallel up-and-down movement of load supporting or containing element
    • B60P1/025—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with parallel up-and-down movement of load supporting or containing element with a loading platform inside the wheels of a same axle and being lowerable below the axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G39/00—Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors 
    • B65G39/10—Arrangements of rollers
    • B65G39/12—Arrangements of rollers mounted on framework
    • 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
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for

Definitions

  • the present invention refers to a device configured to assist in the activity of exchanging return rolls applied to belt conveyors, as well as a method of exchanging return rolls applied to belt conveyors, which makes use of said device to change the return roller.
  • Belt conveyors are mechanisms intended for the continuous transport of bulk material or other types of products, using a belt as a means of traction and carrying element of the material to be transported through it.
  • the material movement occurs on a belt, generally continuous, with reversible movement or not, which moves on drums, rollers and/or sliding tables, horizontally or inclined, or even in curves, along a trajectory determined by the design conditions, having characteristic parts or regions of loading and unloading of the material.
  • Such equipment basically consists of an endless belt, which is extended between two drive drums (drive and return) and an internal structure built by laminated profiles and juxtaposed load rolls, installed on trestles, over the which belt slips with load, allowing the movement of material, usually ore.
  • the return roll basically comprises a central axis and a roll arranged in the central portion and around this central axis, the roll being arranged in direct contact with the conveyor belt, while the ends of the central axis of the return are supported on support frames fixed one on each side of the belt conveyor frame.
  • This high mass of the return rollers also makes it necessary at least two collaborators to carry out the activity of exchanging these elements, since a single collaborator is not able to support this mass, causing a plurality of collaborators have to assist in the exchange of return rollers, which is performed with a long time due to the lack of specific tools for this activity.
  • the return rollers are arranged at the bottom of the belt conveyor, they are arranged close to the ground, making it difficult for employees to access it, requiring employees to be in non-ergonomic positions to have access to the return rollers and, therefore, exert a great deal of physical effort in non-ergonomic positions to move the return rollers, either when removing the damaged return roller or installing a new return roller.
  • Said device comprises, in short, a roller support comprising a first support means and a second support means, a position adjustment system and a support system.
  • the support system consists of rollers that are supported on supports, which are configured to be in contact with the conveyor belt to lift it and, thus, prevent it from having contact with the return roller to be changed. during this process.
  • the roller support is arranged between the rollers of the support system, consisting of a first support means and a second support means.
  • the first support means is provided with rotating supports to be arranged in contact with the roll to be removed to carry out its exchange, while the second support means is provided with fixed supports to support a new return roller to be put in place. of the roller removed.
  • the device's position adjustment system consists of a hydraulic cylinder or the forklift's own movement system in which it is associated, allowing this horizontal movement of the roller support to remove the used return roller and install the new one.
  • KR20020052392A Another document, also included in the state of the art, consists of KR20020052392A, which also discloses a device to perform the exchange of return rollers in belt conveyors, performing the exchange of these elements in an automated way and without the need to stop the conveyor of belts.
  • Such device comprises, in short, a support for new rolls, a support for used rolls, a rotating shaft and a driving element.
  • the rotary axis consists of the element configured to support the supports, being rotated by means of the driving element.
  • the support for used rolls consists of a kind of arm configured to be arranged in contact with the roll installed on the belt conveyor to be replaced.
  • the support for new rolls has a constructive configuration similar to the support for used rolls, the only difference being that it is configured to arrange and support a new roll that will be installed on the belt conveyor after removing the used roll .
  • the support for used rolls is arranged in contact with the used roll and moved through the rotary axis and, after this movement, the rotary axis is rotated again by the driving element, causing the support for new rolls place the new roll in position to be installed on the belt conveyor.
  • document KR20020052392A reveals a device to assist in the exchange of return rollers, it consists of a kind of support for these return rollers, preventing their movement for application in several return rollers and, therefore, being limited to carrying out the replacement of the supported return roller by the same.
  • the aforementioned Korean document also comprises an automated structure to carry out the movement of the return rollers in it, presenting a complex and high cost structure.
  • Such support comprises, in summary, roller supports, easels and easel support.
  • the roller when in its operating position, that is, in direct contact with the belt of the belt conveyor and rotating, it has its ends arranged in contact with the roller support.
  • One of these supports is removable, causing the roll to be decoupled from it and, consequently, to rest on the easels.
  • Such easels are configured to support the roll when it is not in an operating position, that is, when it is ready to be removed/exchanged.
  • the trestles are supported by trestle supports, one of which is a hydraulic cylinder, configured to lift one end of the roll and thus assist in its lateral movement.
  • This lateral movement of the roller allows it to be removed from the support on its side, preventing the employee from making efforts resulting from the elevation and support of the roller, simply just slide it out of the holder.
  • the present invention aims to provide a device for changing the return roller that significantly increases safety and ergonomics in the activity of changing the return rollers on belt conveyors.
  • the present invention also aims to provide a device for exchange of return rolls with a simple and low cost construction, significantly increasing the efficiency in the activity of exchange of return rolls in belt conveyors.
  • the present invention also aims to provide a method for changing return rollers with high safety and efficiency.
  • Figure 1 - reveals a perspective view of the device for changing return rollers of the present invention in its preferred configuration.
  • Figure 2 - reveals a perspective view of the mobile base and the lifting mechanism of the device for changing return rollers of the present invention in its preferred configuration.
  • Figure 3 - reveals a perspective view of the roller support device for exchanging return rollers of the present invention in its preferred configuration.
  • Figure 4 - reveals a side view of the device for changing return rollers of the present invention in application.
  • Figure 5 - reveals a side view of the device for changing return rollers of the present invention in application.
  • Figure 6 - reveals a side view of the device for changing return rollers of the present invention in application.
  • the present invention in its preferred configuration, discloses a device for exchanging return rolls applied to belt conveyors, comprising: a mobile base configured to move the device provided with four wheels and a control rod; a lifting mechanism fixed to the mobile base configured to perform a movement in the vertical orientation; and a roller support fixed to the lifting mechanism provided with: a first element configured to support a new return roller; a second element, fixed to the first element, configured to support a worn return roller; and a third element, secured to the second element, configured to support a worn return roll and a new return roll.
  • the wheels of the mobile base are fixed two in the front portion of the mobile base and two in its rear portion, being arranged two wheels on each side of the mobile base and fixed by means of a caster system to allow the rotation of the wheels in a horizontal direction and the control rod of the mobile base is fixed perpendicularly near the rear end of the mobile base in a pivotable manner.
  • the lifting mechanism comprises an actuator fixed next to the mobile base and an actuator fixed next to the control rod of the mobile base.
  • the actuator consists of a pneumatic cylinder to expand and retract and move the roller support and the actuator consists of a foot pedal to pump and withdraw fluid from the actuator.
  • the first element of the roller support consists of a flat plate equipped with a lifting support perpendicularly fixed near the opposite end to which the second element is fixed, equipped with a roller supported on two rolling bearings configured to be arranged in contact with the belt conveyor belt.
  • the second element of the roller support consists of two “U” beams arranged one at each longitudinal end of the first roller support element.
  • the third element of the roller support consists of two flat beams fixed one to each "U” beam of the second element of the roller support, provided with a cam near the end opposite to that fixed to the second element of the roller support.
  • the present invention also in its preferred configuration, also reveals a method for exchanging return rollers, which makes use of the device for exchanging return rollers that comprises the following steps: (i) positioning a new return roller on the first roller support element of the device; (ii) positioning the device below the worn return roller to be replaced by means of the mobile base; (iii) lifting the roller support by means of the lifting mechanism until the third element of the roller support contacts the worn return roller; (iv) dissociating the worn feedback roller from its support by removing its securing means and raising the roller support until the worn feedback roller rests on the third element of the roller support; (v) moving the worn return roller dissociated in step iv from the third element to the second element of the roller support; (vi) moving the new return roller disposed on the first element to the third element of the roller support; (vii) installing the new return roller by lowering the roller holder through the lifting mechanism, supporting the new return roller on the holder and placing the fixing means; (viii) completely lowering the roller support
  • the main approach of the present invention reveals a device 1 for exchanging return rollers 2 of belt conveyors, allowing to carry out the activity of exchanging these elements with safety, ergonomics and high efficiency, reducing the exposure of employees and the time of activity execution.
  • the device 1 of the present invention comprises a mobile base 3, a lifting mechanism 4 and roller support 5, see figure 1, each of these elements being described in detail below.
  • the mobile base 3 consists of the element configured to allow the movement of the device 1 to the return roller 2 to be replaced.
  • Such mobile base 3 in its preferred configuration, consists of a structure composed of welded beams that comprises four wheels 3' and a control rod 3", see figure 2.
  • the wheels 3' of the mobile base 3 are fixed, two on the front portion of the mobile base 3 and two on its rear portion, two wheels being arranged on each side of the mobile base 3 and fixed by means of a system of rotation, which allows the rotation of the wheels in a horizontal direction to allow maneuvers and curves with the mobile base 3 and, consequently, with the device 1, allowing its positioning.
  • the mobile base 3 of the device 1 can comprise another number of wheels 3', as well as carry out the distribution of these wheels in a different way than the one described in its preferred configuration, so that it is only essential that the base mobile 3 is able to be moved without difficulty to position device 1.
  • the 3" control rod of the mobile base 3 consists of a pivotable rod fixed perpendicularly close to the rear end of the mobile base 3, with a sufficient length for the employee to be able to push and handle the 3" control rod in an ergonomic position and, thus, move the mobile base 3 and device 1 without having to crouch or stand in non-ergonomic positions.
  • control rod 3" can be fixed in other regions of the mobile base 3, as well as having a rigid and non-pivoting fixation as in its preferred configuration, being fundamental only that it is able to guide the movement of the mobile base 3 and, consequently, of the device 1.
  • the lifting mechanism 4 as its name implies, consists of the element configured to perform a vertical movement of the roller support 5 of the device 1, see figure 3.
  • the lifting mechanism 4 comprises a 4' actuator and a 4” actuator.
  • the actuator 4' of the lifting mechanism 4 in its preferred configuration, is arranged in a vertical orientation near the center of the mobile base 3, having one end fixed to the mobile base 3 and the other end fixed to the roller support 5 .
  • the actuator 4' consists of a pneumatic cylinder that performs the elevation of the roller support 5 through its expansion and its lowering through its retraction. the fluid used for this movement, the actuator 4' and, consequently, the roller support 5 is pumped or relieved by means of the actuator 4”.
  • the trigger 4" consists of a kind of pedal fixed close to the rear end of the mobile base 3 and, consequently, close to the control rod 3", so that it can be pressed with the employee's foot to pump the fluid necessary for the expansion of actuator 4' and, thus, raise the roller support 5.
  • actuator 4" when moved in the opposite direction, is able to relieve the actuator 4' and, thus, remove the fluid pumped into it so that it retracts and, in this way, lowers the roller support 5 back to its rest position, that is, just resting on the actuator 4' on the mobile base 3.
  • the actuator 4' of the lifting mechanism 4 may consist of another element than the pneumatic cylinder, such as a mechanical actuator or a hydraulic cylinder, as well as the actuator 4” may consist of another element other than a pedal activated by the employee's foot, its main function being only to perform this movement in the vertical orientation of the roller support 5.
  • the lifting mechanism 4 may comprise elements other than the actuator 4' and the actuator 4", being fundamental only that it is able to carry out a movement of the roller support 5 in the vertical orientation, movement which is essential to assist in the exchange of return rollers 2.
  • the mobile base 3 and the lifting mechanism 4 of the device 1 in its preferred configuration, basically consist of an alligator jack, widely used and widespread in the state of the art to carry out the lifting of vehicles and other applications, according to exemplified in greater detail in document BR202018010807-2.
  • Roller support 5 main element of device 1 of the The present invention consists of the structure configured to be arranged in contact with the worn return roll 2 to carry out its removal and position the new return roll 2 to carry out its installation, see figure 3.
  • the roller support 5 is also composed of welded beams and, as mentioned above, is fixed to the lifting mechanism 4 of the device 1, preferably by means of a rotational fixing on the horizontal axis, allowing the roller support 5 to be rotated with respect to the mobile base 3.
  • the roller support 5 comprises three elements, which: a first element 6 configured to support the new return roller 2 to be installed; a second element 7 configured to support the used return roller 2 after its removal; and a third element 8 configured to carry out the removal and installation of the return roller 2, see figure 4.
  • the first element 6 of the roller support 5 in its preferred configuration, consists of a flat plate, which has its lower face fixed to the actuator 4' of the lifting mechanism 4 and the upper face configured to support and support 2 new return roller to be installed.
  • Lifting bracket 9 is configured to be in direct contact with the belt of the belt conveyor and, thus, cause the belt to lose contact with the return roller 2 to allow its replacement. To avoid great friction between the lifting support 9 and the belt, it comprises a roller 9' supported on two rolling bearings, so that the roller 9' rotates as the belt passes over it and, thus, generates less friction. .
  • the first element 6 of the roller support 5 may comprise a shape other than a flat plate, it being essential only that it is capable of supporting the new return roller 2.
  • the lifting bracket 9 may comprise elements other than the roller 9' and the roller bearings supporting it.
  • the second element 7 of the roller support 5, in its preferred configuration, is composed of two "U” beams fixed to the end of the first element 6 opposite to that of the lifting support 9, so that the second element 7 is at a lower height than the first element 6, allowing the return roller 2 that was removed to rest on its “U” beams of the second element 7.
  • the two "U” beams of the second element 7 are arranged one at each longitudinal end of the first element 6 of the roller support 5, so that the removed return roller 2 is able to stay supported and arranged in the space defined between the two “U” beams of the second element 7.
  • This "U" shape of the second element 7 of the roller support 5 allows that, when removing the worn return roller 2 and moving it to the second element 7, it serves as a support to move the return roller 2 from the first element 6 to the third element 8 of the roller support 5, see figure 5.
  • the second element 7 of the roller support 5 can comprise a shape other than the "U" beams, it being essential only that it supports the removed return roller 2 and does not impede the movement of the roller of return 2 from the first element 6 to the third element 8 of the roller support 5.
  • the third element 8 of the roller support 5 in its preferred configuration, consists of two flat beams fixed to the end of the second element 7 opposite to that which is fixed to the first element 6 of the roller support 5, so that the second element 7 is arranged between the third element 8 and the first element 6 of the roller support 5.
  • the two flat beams of the third element 8 comprise a cam 8' fixed at its end opposite the end fixed to the second element 7, in order to prevent the return roller 2 supported by the third element 8 will move in a direction other than the direction of the second element 7.
  • the third element 8 of the roller support 5 may comprise a shape other than that of two flat beams with a shoulder 8' at its end, this being its preferred configuration only for material and weight reduction of the roller support 5 and, consequently, of the device 1.
  • the third element 8 is configured to be arranged first in contact with the worn return roller 2, allowing it to be lifted by means of the lifting mechanism 4 to dissociate it from its support and, thus, carry out its removal.
  • the worn return roller 2 decoupled and supported on the third element 8 it is manually rotated by the employee until it reaches the second element 7 of the roller support 5 and, thus, is arranged supported on the "U" beams thereof.
  • the first step consists of positioning a new return roller 2, which is to be installed in place of the worn return roller 2, on the first element 6 of the roller support 5, so that all the following steps of the method are carried out with the new return roller 2 positioned on the roller support 5 of the device 1 , see figure 4.
  • This positioning of the new return roller 2 on the first element 6 of the roller support 5 can be performed manually by the employee, or with the aid of other lifting tools to carry out the lifting of the new return roller 2 to the first element 6 of the roll holder 5.
  • the second step consists of positioning the device 1 of the present invention below the return roller 2 that is to be replaced. This positioning is carried out by means of the mobile base 3 of the device 1, allowing its movement to precisely position it below the worn return roller 2 that is to be replaced.
  • the third step begins, which consists of lifting the roller support 5 of the device 1 through the lifting mechanism 4, making the third part 8 of the roller support 5 contact the worn return roller 2.
  • This third step is performed, in the preferred configuration of device 1, by means of actuator 4” which is pressed by the employee to carry out the expansion of actuator 4' of the lifting mechanism 4 and, thus, carry out the elevation of the support of rollers 5 until their third element 8 is arranged in contact with the worn return roller 2 that is desired to replace.
  • the fourth step consists of dissociating the worn return roller 2 from the support thereof by removing its fixing elements and lifting the third element 8 from the roller support 5, causing the worn return roller 2 to be removed from its support and rests on the third element 8 of the roller support 5, see figure 5.
  • the return roller 2 fixing elements on its support may consist of screws or other elements, which are manually removed by the employee with the aid of specific tools, not being the object of the present invention and, therefore, not described in greater detail.
  • the fifth step consists of moving the worn return roller 2 dissociated from the third element 8 to the second element 7 of the roller support 5, this movement being performed manually by the employee, who rotates the worn return roller 2 until the it is arranged and supported on the “U” beams of the second element 7 of the roller support 5, see figure 6.
  • the sixth step consists of moving the new return roller 2 arranged in the first element 6 to the third element 8 of the roller support 5, this movement also being performed manually by the employee, rotating the new return roller 2 over the worn return roller 2 arranged on the second element 7 and reaching up to the third element 8 of the roller support 5.
  • the seventh step consists of installing the new return roller 2 on its support by lowering the third element 8 of the roller support 5 through the lifting mechanism 4, making the new return roller 2 rest on its support to allow the insertion of its fastening means and, thus, complete its installation.
  • the eighth and last step consists of performing the lowering complete the roller support 5 through the lifting mechanism 4 and remove the device 1 by moving it through the mobile base 3, completing the activity of changing the return roller 2.
  • the employee can remove the worn return roll 2 arranged in the second element 7 of the roller support 5 or carry out the transport of this return roll 2 positioned in the device itself 1.
  • Such advantages consist of increased safety and ergonomics due to the fact that the employee no longer needs to lift or support the return roller 2, which has a high mass, as well as he no longer needs to be close under the belt conveyor. to carry out the activity of changing the return roller 2, so that the only physical effort made by the employee is to rotate the return roller 2 supported on the roller support 5 of device 1.
  • device 1 for exchanging return rollers 2 Another advantage achieved by device 1 for exchanging return rollers 2 is the increase in efficiency that is achieved as a result of the fact that all steps involved in exchanging return roller 2 are carried out with the aid of device 1, allowing them to be carried out with practicality and only with a single employee, unlike the state of the art in which all the activity was performed manually and with at least three employees.
  • the device 1 for exchanging return rollers 2 is the fact that it has a simple and low cost construction, without including automation and can be used in all places. [00104] Therefore, the present invention mitigates the inherent problems of this activity in the state of the art, in addition to promoting improvements in safety, ergonomics, efficiency and cost, as explained above, constituting a new and effective equipment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)

Abstract

The present invention relates to a device (1) for replacing return rollers (2) used in conveyor belts, which is inexpensive and not complex to build and allows this activity to be carried out safely, ergonomically and efficiently. This device (1) comprises a moveable base (3), a lifting mechanism (4) and a roller support (5), enabling a used return roller (2) to be removed and a new return roller (2) to be installed by moving the device (1). The present invention also relates to a method for replacing return rollers that uses the device (1) for replacing return rollers (2), comprising eight steps required to replace the return roller (2).

Description

DISPOSITIVO PARA TROCA DE ROLO DE RETORNO E MÉTODO DE TROCA DE ROLO DE RETORNO DEVICE FOR RETURN ROLLER CHANGE AND RETURN ROLLER CHANGE METHOD
Campo da Invenção Field of Invention
[001] A presente invenção se refere a um dispositivo configurado para auxiliar na atividade de troca de rolos de retomo aplicados em transportadores de correia, assim como um método de troca de rolo de retornos aplicados em transportadores de correia, que faz uso do referido dispositivo para troca de rolo de retorno. [001] The present invention refers to a device configured to assist in the activity of exchanging return rolls applied to belt conveyors, as well as a method of exchanging return rolls applied to belt conveyors, which makes use of said device to change the return roller.
Antecedentes da Invenção Background of the Invention
[002] Os transportadores de correia são mecanismos destinados ao transporte contínuo de material a granel ou outros tipos de produtos, utilizando uma correia como meio de tração e elemento portador do material a ser transportado por meio desta. [002] Belt conveyors are mechanisms intended for the continuous transport of bulk material or other types of products, using a belt as a means of traction and carrying element of the material to be transported through it.
[003] A movimentação do material ocorre em uma correia, geralmente contínua, com movimento reversível ou não, que se desloca sobre tambores, roletes e/ou mesas de deslizamento, de forma horizontal ou inclinada, ou mesmo em curvas, ao longo de uma trajetória determinada pelas condições de projeto, possuindo partes ou regiões características de carregamento e descarga do material. [003] The material movement occurs on a belt, generally continuous, with reversible movement or not, which moves on drums, rollers and/or sliding tables, horizontally or inclined, or even in curves, along a trajectory determined by the design conditions, having characteristic parts or regions of loading and unloading of the material.
[004] O tipo de construção dos transportadores de correia deve garantir que eles sejam adequados para: a) absorver a energia do choque dos materiais no curso do seu carregamento; b) transportar os materiais nas melhores condições de estabilidade, de forma a evitar ou minimizar suas perdas por projeção ou fracionamento; e c) transmitir as tensões resultantes das resistências ao deslocamento que existem, estando ou não carregados. [004] The type of construction of belt conveyors must ensure that they are suitable for: a) absorbing the shock energy of materials in the course of their loading; b) transport the materials in the best stability conditions, in order to avoid or minimize their losses by projection or fractionation; and c) transmitting the stresses resulting from the displacement resistances that exist, whether or not they are loaded.
[005] Tais equipamentos consistem, basicamente, em uma correia sem fim, a qual é estendida entre dois tambores de acionamento (motriz e de retorno) e uma estrutura interna construída por perfis laminados e rolos de carga justapostos, instalados em cavaletes, sobre os quais a correia desliza com carga, possibilitando a movimentação do material, geralmente, minério. [005] Such equipment basically consists of an endless belt, which is extended between two drive drums (drive and return) and an internal structure built by laminated profiles and juxtaposed load rolls, installed on trestles, over the which belt slips with load, allowing the movement of material, usually ore.
[006] Quando sem carga, a correia desliza sobre rolos conhecidos como rolos de retomo, sendo os mesmos responsáveis por guiar a correia sem carga e, assim, permitindo que esta alcance até o tambor motriz para ser, novamente, carregada com o material a ser transportado. [006] When unloaded, the belt slides over rollers known as return rollers, which are responsible for guiding the belt without load and, thus, allowing it to reach the driving drum to be loaded again with the material to be be transported.
[007] O rolo de retomo compreende, basicamente, um eixo central e um rolo disposto na porção central e ao redor desse eixo central, sendo o rolo disposto em contato direto com a correia do transportador, enquanto as extremidades do eixo central do rolo de retorno são apoiadas em estmturas de suporte fixadas uma em cada lado da estmtura do transportador de correias. [007] The return roll basically comprises a central axis and a roll arranged in the central portion and around this central axis, the roll being arranged in direct contact with the conveyor belt, while the ends of the central axis of the return are supported on support frames fixed one on each side of the belt conveyor frame.
[008] Desse modo, devido à rotação constante do rolo de retomo para reduzir o atrito com a correia durante a sua movimentação de retomo, assim como a abrasividade decorrente do contato desses elementos, se faz necessário trocar com frequência esses rolos de retomo para evitar acidentes graves como, por exemplo, danificação da correia e incêndios. [008] Thus, due to the constant rotation of the return roller to reduce friction with the belt during its return movement, as well as the abrasiveness resulting from the contact of these elements, it is necessary to frequently change these return rollers to avoid serious accidents such as belt damage and fire.
[009] No estado da técnica, a atividade de troca dos rolos de retomo é realizada de maneira completamente manual, com a utilização de ferramentas apenas para realizar o içamento da correia, fazendo com a mesma seja elevada e perca o contato com o rolo de retomo para possibilitar a sua substituição. [009] In the state of the art, the activity of exchanging the return rollers is carried out completely manually, with the use of tools only to lift the belt, causing it to be lifted and lose contact with the roller. return to enable its replacement.
[0010] Devido a falta de ferramentas específicas para essa atividade, os colaboradores realizam a remoção do rolo de retomo desgastado e a instalação do novo rolo de retomo de maneira totalmente manual, sem o auxílio de nenhuma ferramenta, ficando sujeitos a um grande esforço físico e riscos de acidentes em decorrência da elevada massa dos rolos de retomo. [0010] Due to the lack of specific tools for this activity, employees remove the worn return roller and install the new return roller completely manually, without the aid of any tools, being subject to great physical effort and risk of accidents due to the high mass of the return rollers.
[0011] Essa massa elevada dos rolos de retomo também faz com que seja necessário pelo menos dois colaboradores para realizar a atividade de troca desses elementos, uma vez que um único colaborador não é capaz de suportar essa massa, fazendo com que uma pluralidade de colaboradores tenham que auxiliar na troca dos rolos de retomo, que é realizada com um tempo elevado devido à falta de ferramentas especificas para essa atividade. [0011] This high mass of the return rollers also makes it necessary at least two collaborators to carry out the activity of exchanging these elements, since a single collaborator is not able to support this mass, causing a plurality of collaborators have to assist in the exchange of return rollers, which is performed with a long time due to the lack of specific tools for this activity.
[0012] Além disso, como os rolos de retomo são dispostos na parte inferior do transportador de correias, os mesmos são dispostos próximos ao solo, dificultando o acesso dos colaboradores ao mesmo, necessitando que os colaboradores fiquem em posições nada ergonômicas para ter acesso aos rolos de retomo e, assim, realizar um grande esforço físico em posições nada ergonômicas para movimentar os rolos de retorno, seja durante a remoção do rolo de retomo danificado ou na instalação do rolo de retomo novo. [0012] In addition, as the return rollers are arranged at the bottom of the belt conveyor, they are arranged close to the ground, making it difficult for employees to access it, requiring employees to be in non-ergonomic positions to have access to the return rollers and, therefore, exert a great deal of physical effort in non-ergonomic positions to move the return rollers, either when removing the damaged return roller or installing a new return roller.
[0013] A proximidade dos rolos de retomo com o solo também possuem um agravante para o colaborador em decorrência dos locais em que os transportadores de correia são instalados, tipicamente em locais distantes da área urbana e, portanto, com acumulo de lama e, inclusive, fezes de animais, fazendo com que o operador muitas vezes tenha que se apoiar nessa lama e nas fezes de animais para ter acesso ao rolo de retomo e, assim, conseguir realizar a sua substituição. [0013] The proximity of the return rollers to the ground also has an aggravating factor for the employee due to the places where the belt conveyors are installed, typically in places far from the urban area and, therefore, with accumulation of mud and even , animal feces, making the operator often have to lean on this mud and animal feces to gain access to the return roller and, thus, be able to carry out its replacement.
[0014] Portanto, resta evidente que a atividade de troca dos rolos de retorno no estado da técnica apresenta diversos inconvenientes, submetendo o colaborador a um esforço físico elevado e falta de segurança em decorrência da elevada massa do rolo de retomo, assim como submetendo o colaborador a ficar em posições nada ergonômicas em proximidade com o solo com acumulo de lama e, inclusive, fezes de animais. [0014] Therefore, it is evident that the activity of exchanging the return rollers in the state of the art has several drawbacks, subjecting the employee to a high physical effort and lack of security due to the high mass of the return roller, as well as subjecting the employee to stay in non-ergonomic positions close to the ground with accumulation of mud and even animal feces.
[0015] Há, ainda no estado da técnica, alguns documentos de patente que descrevem ferramentas especificas para essa atividade de troca de rolo de retorno, como é o caso do documento KR20120066480A, o qual revela um dispositivo que permite realizar uma movimentação simultânea do rolo de retorno a ser removido e do rolo de retorno a ser instalado, auxiliando na troca desses elementos. [0015] There are, still in the state of the art, some patent documents that describe specific tools for this return roll exchange activity, as is the case of document KR20120066480A, which reveals a device that allows performing a simultaneous movement of the roll the return roller to be removed and the return roller to be installed, helping to change these elements.
[0016] O referido dispositivo compreende, de maneira resumida, um suporte para rolos composto por um primeiro meio de apoio e um segundo meio de apoio, um sistema de ajuste de posição e um sistema de suporte. O sistema de suporte é composto por rolos que são apoiados em suportes, sendo os mesmos configurados para se disporem em contato com a correia do transportador para eleva-la e, assim, impedir que a mesma tenha contato com o rolo de retorno a ser trocado durante esse processo. [0016] Said device comprises, in short, a roller support comprising a first support means and a second support means, a position adjustment system and a support system. The support system consists of rollers that are supported on supports, which are configured to be in contact with the conveyor belt to lift it and, thus, prevent it from having contact with the return roller to be changed. during this process.
[0017] O suporte para rolos é disposto entre os rolos do sistema de suporte, composto por um primeiro meio de apoio e por um segundo meio de apoio. O primeiro meio de apoio é dotado de suportes rotativos para se disporem em contato com o rolo a ser retirado para realizar a sua troca, enquanto o segundo meio de apoio é dotado de suportes fixos para suportarem um rolo de retomo novo a ser colocado no lugar do rolo removido. [0017] The roller support is arranged between the rollers of the support system, consisting of a first support means and a second support means. The first support means is provided with rotating supports to be arranged in contact with the roll to be removed to carry out its exchange, while the second support means is provided with fixed supports to support a new return roller to be put in place. of the roller removed.
[0018] Toda essa movimentação necessária para dispor o primeiro meio de apoio em contato com o rolo de retomo a ser removido e movimentar o segundo meio de apoio com o rolo de retomo novo na estmtura do transportador de correias é realizada por meio de uma empilhadeira na orientação vertical e pelo sistema de ajuste de posição na orientação horizontal. [0018] All this movement necessary to have the first support means in contact with the return roller to be removed and move the second support means with the new return roller in the structure of the belt conveyor is carried out by means of a forklift in portrait orientation and by the position adjustment system in landscape orientation.
[0019] O sistema de ajuste de posição do dispositivo consiste em um cilindro hidráulico ou o próprio sistema de movimentação da empilhadeira em que é associado, permitindo realizar essa movimentação horizontal do suporte de rolos para remover o rolo de retorno usado e instalar o novo. [0019] The device's position adjustment system consists of a hydraulic cylinder or the forklift's own movement system in which it is associated, allowing this horizontal movement of the roller support to remove the used return roller and install the new one.
[0020] Entretanto, embora o dispositivo revelado no documento KR20 120066480 auxilie na atividade de troca dos rolos de retomo de transportadores de correia, o mesmo necessita ser associado a uma empilhadeira para realizar a movimentação dos rolos de retomo durante a sua substituição, de modo que, seja impossível a sua aplicação para substituição de rolos de retomo próximo ao solo. [0020] However, although the device revealed in the document KR20 120066480 helps in the activity of changing the return rollers of belt conveyors, it needs to be associated with a forklift to carry out the movement of the return rollers during their replacement, so that its application to replace return rollers close to the ground is impossible.
[0021] Além disso, toda a movimentação do dispositivo revelado no documento coreano supracitado é realizada por meio dessa empilhadeira, de modo que, o mesmo não possa ser utilizado sem estar acoplado à empilhadeira, impedindo a sua utilização em rolos de retorno dispostos próximos ao solo. [0021] In addition, all device drive revealed in the Korean document mentioned above is carried out by means of this forklift, so that it cannot be used without being coupled to the forklift, preventing its use in return rollers arranged close to the ground.
[0022] Não obstante, toda a estrutura do dispositivo no documento supracitado é automatizada, de modo a compreender uma configuração construtiva complexa e de alto custo envolvido. [0022] Nevertheless, the entire structure of the device in the aforementioned document is automated, in order to understand a complex constructive configuration and high cost involved.
[0023] Outro documento, também compreendido no estado da técnica, consiste no KR20020052392A, que também revela um dispositivo para realizar a troca de rolos de retomo em transportadores de correia, realizando a troca desses elementos de maneira automatizada e sem necessidade de parar o transportador de correias. [0023] Another document, also included in the state of the art, consists of KR20020052392A, which also discloses a device to perform the exchange of return rollers in belt conveyors, performing the exchange of these elements in an automated way and without the need to stop the conveyor of belts.
[0024] Tal dispositivo compreende, de maneira resumida, um suporte para rolos novos, um suporte para rolos usados, um eixo rotativo e um elemento acionador. O eixo rotativo consiste no elemento configurado por suportar os suportes, sendo o mesmo rotacionado por meio do elemento acionador. O suporte para rolos usados consiste em uma espécie de braço configurado para se dispor em contato com o rolo instalado no transportador de correias que se deseja substituir. [0024] Such device comprises, in short, a support for new rolls, a support for used rolls, a rotating shaft and a driving element. The rotary axis consists of the element configured to support the supports, being rotated by means of the driving element. The support for used rolls consists of a kind of arm configured to be arranged in contact with the roll installed on the belt conveyor to be replaced.
[0025] O suporte para rolos novos possui uma configuração construtiva semelhante ao suporte para rolos usados, tendo como diferença apenas o fato de que é configurado para se dispor e suportar um rolo novo que será instalado no transportador de correias após a remoção do rolo usado. [0025] The support for new rolls has a constructive configuration similar to the support for used rolls, the only difference being that it is configured to arrange and support a new roll that will be installed on the belt conveyor after removing the used roll .
[0026] Desse modo, o suporte para rolos usados é disposto em contato com o rolo usado e movimentado por meio do eixo rotativo e, após essa movimentação, o eixo rotativo é rotacionado novamente pelo elemento acionador, fazendo com que o suporte para rolos novos coloque o rolo novo em posição para ser instalado ao transportador de correias. [0026] In this way, the support for used rolls is arranged in contact with the used roll and moved through the rotary axis and, after this movement, the rotary axis is rotated again by the driving element, causing the support for new rolls place the new roll in position to be installed on the belt conveyor.
[0027] Entretanto, embora o documento KR20020052392A revele um dispositivo para auxiliar na troca de rolos de retomo, o mesmo consiste em uma espécie de suporte para esses rolos de retomo, impedindo a sua movimentação para aplicação em diversos rolos de retorno e, portanto, restando limitado a realizar a substituição do rolo de retomo suportado pelo mesmo. [0027] However, although document KR20020052392A reveals a device to assist in the exchange of return rollers, it consists of a kind of support for these return rollers, preventing their movement for application in several return rollers and, therefore, being limited to carrying out the replacement of the supported return roller by the same.
[0028] Além disso, o documento coreano supracitado também compreende uma estmtura automatizada para realizar a movimentação dos rolos de retomo no mesmo, apresentando uma estmtura complexa e de alto custo. [0028] In addition, the aforementioned Korean document also comprises an automated structure to carry out the movement of the return rollers in it, presenting a complex and high cost structure.
[0029] Ainda no estado da técnica, outro documento consiste no US20130140144A1, que revela um suporte para rolos de transportadores de correias, tal suporte compreendendo elementos e meios configurados para possibilitar dissociar e retirar o rolo instalado ao mesmo de maneira prática e segura durante a necessidade de troca desse elemento. [0029] Still in the state of the art, another document consists of US20130140144A1, which discloses a support for belt conveyor rollers, such support comprising elements and means configured to make it possible to dissociate and remove the roller installed therein in a practical and safe way during need to replace that element.
[0030] Tal suporte compreende, de maneira resumida, apoios de rolo, cavaletes e suporte de cavaletes. O rolo, quando em sua posição de operação, ou seja, em contato direto com a correia do transportador de correias e rotacionando, o mesmo possui as suas extremidades dispostas em contato com o apoio de rolos. Um desses apoio é removível, fazendo com que o rolo seja dissociado do mesmo e, consequentemente, fique apoiado sobre os cavaletes. [0030] Such support comprises, in summary, roller supports, easels and easel support. The roller, when in its operating position, that is, in direct contact with the belt of the belt conveyor and rotating, it has its ends arranged in contact with the roller support. One of these supports is removable, causing the roll to be decoupled from it and, consequently, to rest on the easels.
[0031] Tais cavaletes, conforme mencionado acima, são configurados para suportar o rolo quando o mesmo não se encontra em posição de operação, ou seja, quando o mesmo está pronto para ser retirado/trocado. Os cavaletes são apoiados por suportes de cavalete, sendo um deles um cilindro hidráulico, configurado para elevar uma das extremidades do rolo e, assim, auxiliar na sua movimentação lateral. [0031] Such easels, as mentioned above, are configured to support the roll when it is not in an operating position, that is, when it is ready to be removed/exchanged. The trestles are supported by trestle supports, one of which is a hydraulic cylinder, configured to lift one end of the roll and thus assist in its lateral movement.
[0032] Essa movimentação lateral do rolete permite que o mesmo seja removido do suporte pela lateral do mesmo, evitando que o colaborador realize esforços decorrentes da elevação e sustentação do rolo, bastando apenas deslizar o mesmo para fora do suporte. [0032] This lateral movement of the roller allows it to be removed from the support on its side, preventing the employee from making efforts resulting from the elevation and support of the roller, simply just slide it out of the holder.
[0033] Entretanto, embora o dispositivo descrito em US20130140144A1 auxilie na troca de rolos de retomo de transportadores de correia, o mesmo consiste em um suporte para esses elementos, de modo que, o mesmo seja aplicado para um único rolo de retomo, impedindo a sua movimentação e utilização em múltiplos rolos de retomo do mesmo transportador de correias. [0033] However, although the device described in US20130140144A1 helps in the exchange of return rollers of belt conveyors, it consists of a support for these elements, so that it is applied to a single return roller, preventing the its movement and use in multiple return rollers of the same belt conveyor.
[0034] Além disso, para realizar a remoção do rolo de retomo desgastado, o colaborador necessita realizar um esforço físico para deslizar o rolo pela sua abertura lateral, apresentando também baixa ergonomia e necessidade de esforço físico, assim como essa atividade é realizada no estado da técnica. [0034] In addition, to remove the worn return roller, the employee needs to make a physical effort to slide the roller through its side opening, also presenting low ergonomics and the need for physical effort, as well as this activity is performed in the state of the technique.
[0035] Conclui-se pelas buscas e análise do estado da técnica, que não há um dispositivo configurado para realizar a troca de rolos de retomo com segurança e ergonomia, impedindo que o colaborador realize um grande esforço físico ou fique em posições não ergonômicas durante a atividade de troca desses elementos. [0035] It is concluded from the searches and analysis of the state of the art, that there is no device configured to perform the exchange of return rollers safely and ergonomically, preventing the employee from performing a great physical effort or staying in non-ergonomic positions during the activity of exchanging these elements.
[0036] Não há, ainda no estado da técnica, um dispositivo configurado para realizar a troca de rolos de retomo com alta eficiência e uma constmção simples com baixo custo de confecção e aplicação, que permita realizar a remoção do rolo de retomo desgastado e a instalação do rolo de retorno novo de maneira prática e sem a necessidade de estrutura de alta complexidade e automatização. [0036] There is not, yet in the state of the art, a device configured to perform the exchange of return rolls with high efficiency and a simple construction with low cost of manufacture and application, which allows the removal of the worn return roll and the installation of the new return roller in a practical way and without the need for a highly complex structure and automation.
[0037] Por último, não há no estado da técnica, um método para realizar a troca de rolos de retomo que apresente grande segurança e eficiência, diminuindo a exposição dos colaboradores responsáveis por essa atividade e o tempo de execução da mesma. [0037] Finally, in the state of the art, there is no method to perform the exchange of return rolls that presents great safety and efficiency, reducing the exposure of the employees responsible for this activity and the time of execution of the same.
Objetivos da Invenção Objectives of the Invention
[0038] A presente invenção tem como objetivo proporcionar um dispositivo para troca de rolo de retomo que aumente significativamente a segurança e a ergonomia na atividade de troca de rolos de retomo em transportadores de correia. [0038] The present invention aims to provide a device for changing the return roller that significantly increases safety and ergonomics in the activity of changing the return rollers on belt conveyors.
[0039] A presente invenção também tem como objetivo proporcionar um dispositivo para troca de rolo de retomo com uma constmção simples e de baixo custo, aumentando significativamente a eficiência na atividade de troca de rolos de retomo em transportadores de correia. [0039] The present invention also aims to provide a device for exchange of return rolls with a simple and low cost construction, significantly increasing the efficiency in the activity of exchange of return rolls in belt conveyors.
[0040] Por último, a presente invenção também tem como objetivo proporcionar um método para troca de rolos de retorno com alta segurança e eficiência. [0040] Lastly, the present invention also aims to provide a method for changing return rollers with high safety and efficiency.
Breve Descrição dos Desenhos Brief Description of Drawings
[0041] A presente invenção é detalhadamente ilustrada com base nas respectivas figuras: [0041] The present invention is illustrated in detail based on the respective figures:
[0042] Figura 1 - revela uma vista em perspectiva do dispositivo para troca de rolos de retomo da presente invenção em sua configuração preferencial. [0042] Figure 1 - reveals a perspective view of the device for changing return rollers of the present invention in its preferred configuration.
[0043] Figura 2 - revela uma vista em perspectiva da base móvel e do mecanismo de elevação do dispositivo para troca de rolos de retorno da presente invenção em sua configuração preferencial. [0043] Figure 2 - reveals a perspective view of the mobile base and the lifting mechanism of the device for changing return rollers of the present invention in its preferred configuration.
[0044] Figura 3 - revela uma vista em perspectiva do suporte de rolos do dispositivo para troca de rolos de retomo da presente invenção em sua configuração preferencial. [0044] Figure 3 - reveals a perspective view of the roller support device for exchanging return rollers of the present invention in its preferred configuration.
[0045] Figura 4 - revela uma vista lateral do dispositivo para troca de rolos de retomo da presente invenção em aplicação. [0045] Figure 4 - reveals a side view of the device for changing return rollers of the present invention in application.
[0046] Figura 5 - revela uma vista lateral do dispositivo para troca de rolos de retomo da presente invenção em aplicação. [0046] Figure 5 - reveals a side view of the device for changing return rollers of the present invention in application.
[0047] Figura 6 - revela uma vista lateral do dispositivo para troca de rolos de retomo da presente invenção em aplicação. [0047] Figure 6 - reveals a side view of the device for changing return rollers of the present invention in application.
Sumário da Invenção [0048] A presente invenção, em sua configuração preferencial, revela um dispositivo para troca de rolos de retomo aplicados em transportadores de correias que compreende: uma base móvel configurada para movimentar o dispositivo dotada de quatro rodas e uma haste de controle; um mecanismo de elevação fixado à base móvel configurado para realizar uma movimentação na orientação vertical; e um suporte de rolos fixado ao mecanismo de elevação dotado de: um primeiro elemento configurado para suportar um rolo de retorno novo; um segundo elemento, fixado ao primeiro elemento, configurado para suportar um rolo de retomo desgastado; e um terceiro elemento, fixado ao segundo elemento, configurado para suportar um rolo de retorno desgastado e um rolo de retomo novo. Summary of the Invention [0048] The present invention, in its preferred configuration, discloses a device for exchanging return rolls applied to belt conveyors, comprising: a mobile base configured to move the device provided with four wheels and a control rod; a lifting mechanism fixed to the mobile base configured to perform a movement in the vertical orientation; and a roller support fixed to the lifting mechanism provided with: a first element configured to support a new return roller; a second element, fixed to the first element, configured to support a worn return roller; and a third element, secured to the second element, configured to support a worn return roll and a new return roll.
[0049] As rodas da base móvel são fixadas duas na porção frontal da base móvel e duas na sua porção traseira, sendo dispostas duas rodas em cada lado da base móvel e fixadas por meio de um sistema de rodízio para permitir a rotação das rodas em um sentido horizontal e a haste de controle da base móvel é fixada perpendicularmente próximo à extremidade traseira da base móvel de maneira pivotável. [0049] The wheels of the mobile base are fixed two in the front portion of the mobile base and two in its rear portion, being arranged two wheels on each side of the mobile base and fixed by means of a caster system to allow the rotation of the wheels in a horizontal direction and the control rod of the mobile base is fixed perpendicularly near the rear end of the mobile base in a pivotable manner.
[0050] O mecanismo de elevação compreende um atuador fixado próximo à base móvel e um acionador fixado próximo à haste de controle da base móvel. O atuador consiste em um cilindro pneumático para expandir e retrair e movimentar o suporte de rolos e o acionador consiste em um pedal para bombear e retirar o fluido do atuador. [0050] The lifting mechanism comprises an actuator fixed next to the mobile base and an actuator fixed next to the control rod of the mobile base. The actuator consists of a pneumatic cylinder to expand and retract and move the roller support and the actuator consists of a foot pedal to pump and withdraw fluid from the actuator.
[0051] O primeiro elemento do suporte de rolos consiste em uma chapa plana dotada de um suporte de içamento perpendicularmente fixado próximo a extremidade oposta a qual o segundo elemento é fixado, dotado de um rolo apoiado em dois mancais de rolamento configurado para se dispor em contato com a correia do transportador de correias. [0051] The first element of the roller support consists of a flat plate equipped with a lifting support perpendicularly fixed near the opposite end to which the second element is fixed, equipped with a roller supported on two rolling bearings configured to be arranged in contact with the belt conveyor belt.
[0052] O segundo elemento do suporte de rolos consiste em duas vigas em “U” dispostas uma em cada extremidade longitudinal do primeiro elemento do suporte de rolos. O terceiro elemento do suporte de rolos consiste em duas vigas planas fixadas uma em cada viga “U” do segundo elemento do suporte de rolos, dotadas de um sobressalto próximo a extremidade oposta à fixada ao segundo elemento do suporte de rolos. [0052] The second element of the roller support consists of two “U” beams arranged one at each longitudinal end of the first roller support element. The third element of the roller support consists of two flat beams fixed one to each "U" beam of the second element of the roller support, provided with a cam near the end opposite to that fixed to the second element of the roller support.
[0053] A presente invenção, ainda em sua configuração preferencial, revela também um método para troca de rolos de retomo, que faz uso do dispositivo para troca de rolos de retorno que compreende as seguintes etapas: (i) posicionar um rolo de retomo novo no primeiro elemento do suporte de rolos do dispositivo; (ii) posicionar o dispositivo abaixo do rolo de retomo desgastado a ser substituído por meio da base móvel; (iii) elevar o suporte de rolos por meio do mecanismo de elevação até que o terceiro elemento do suporte de rolos tenha contato com o rolo de retomo desgastado; (iv) dissociar o rolo de retomo desgastado do seu suporte por meio da remoção dos seus meios de fixação e elevando o suporte de rolos até que o rolo de retomo desgastado fique apoiado sobre o terceiro elemento do suporte de rolos; (v) movimentar o rolo de retomo desgastado dissociado na etapa iv do terceiro elemento até o segundo elemento do suporte de rolos; (vi) movimentar o rolo de retomo novo disposto no primeiro elemento até o terceiro elemento do suporte de rolos; (vii) instalar o rolo de retorno novo por meio do abaixamento do suporte para rolos através do mecanismo de elevação, apoiando o rolo de retomo novo no suporte e colocando os meios de fixação; (viii) abaixar completamente o suporte para rolos por meio do mecanismo de elevação e retirar o dispositivo (1) de baixo do transportador de correias por meio da base móvel. [0053] The present invention, still in its preferred configuration, also reveals a method for exchanging return rollers, which makes use of the device for exchanging return rollers that comprises the following steps: (i) positioning a new return roller on the first roller support element of the device; (ii) positioning the device below the worn return roller to be replaced by means of the mobile base; (iii) lifting the roller support by means of the lifting mechanism until the third element of the roller support contacts the worn return roller; (iv) dissociating the worn feedback roller from its support by removing its securing means and raising the roller support until the worn feedback roller rests on the third element of the roller support; (v) moving the worn return roller dissociated in step iv from the third element to the second element of the roller support; (vi) moving the new return roller disposed on the first element to the third element of the roller support; (vii) installing the new return roller by lowering the roller holder through the lifting mechanism, supporting the new return roller on the holder and placing the fixing means; (viii) completely lowering the roller support by means of the lifting mechanism and removing the device (1) from under the belt conveyor by means of the mobile base.
[0054] A movimentação do rolo de retomo desgastado e do rolo de retorno novo nas etapas v e vi é realizado manualmente pelo colaborador rotacionando os rolos de retomo apoiados sobre o suporte para rolos. [0054] The movement of the worn return roll and the new return roll in steps v and vi is performed manually by the employee rotating the return rolls supported on the roller support.
Descrição Detalhada da Invenção Detailed Description of the Invention
[0055] Embora a presente invenção possa ser implementada em diferentes modalidades, constam das figuras e da descrição detalhada que se segue, as configurações preferenciais da mesma, partindo do pressuposto de que a presente descrição deve ser considerada para fins meramente exemplificativos, não se limitando ao que aqui está ilustrado ou descrito. [0055] Although the present invention can be implemented in In different modalities, the figures and the detailed description that follow, the preferred configurations of the same, appear on the assumption that the present description must be considered for merely exemplary purposes, not being limited to what is illustrated or described herein.
[0056] A principal abordagem da presente invenção revela um dispositivo 1 para troca de rolos de retomo 2 de transportadores de correias, permitindo realizar a atividade de troca desses elementos com segurança, ergonomia e alta eficiência, diminuindo a exposição dos colaboradores e o tempo de execução da atividade. [0056] The main approach of the present invention reveals a device 1 for exchanging return rollers 2 of belt conveyors, allowing to carry out the activity of exchanging these elements with safety, ergonomics and high efficiency, reducing the exposure of employees and the time of activity execution.
[0057] Em sua concretização preferencial, o dispositivo 1 da presente invenção compreende uma base móvel 3, um mecanismo de elevação 4 e suporte de rolos 5, vide a figura 1, sendo cada um desses elementos detalhadamente descritos a seguir. [0057] In its preferred embodiment, the device 1 of the present invention comprises a mobile base 3, a lifting mechanism 4 and roller support 5, see figure 1, each of these elements being described in detail below.
[0058] A base móvel 3 consiste no elemento configurado para permitir a movimentação do dispositivo 1 até o rolo de retomo 2 a ser substituído. Tal base móvel 3, em sua configuração preferencial, consiste em uma estrutura composta por vigas soldadas que compreende quatro rodas 3’ e uma haste de controle 3”, vide a figura 2. [0058] The mobile base 3 consists of the element configured to allow the movement of the device 1 to the return roller 2 to be replaced. Such mobile base 3, in its preferred configuration, consists of a structure composed of welded beams that comprises four wheels 3' and a control rod 3", see figure 2.
[0059] Ainda em sua configuração preferencial, as rodas 3’ da base móvel 3 são fixadas duas na porção frontal da base móvel 3 e duas na sua porção traseira, sendo dispostas duas rodas em cada lado da base móvel 3 e fixadas por meio de um sistema de rodízio, que permite a rotação das rodas em um sentido horizontal para permitir realizar manobras e curvas com a base móvel 3 e, consequentemente com o dispositivo 1, permitindo o seu posicionamento. [0059] Still in its preferred configuration, the wheels 3' of the mobile base 3 are fixed, two on the front portion of the mobile base 3 and two on its rear portion, two wheels being arranged on each side of the mobile base 3 and fixed by means of a system of rotation, which allows the rotation of the wheels in a horizontal direction to allow maneuvers and curves with the mobile base 3 and, consequently, with the device 1, allowing its positioning.
[0060] Em configurações alternativas, a base móvel 3 do dispositivo 1 pode compreender outra quantidade de rodas 3’, assim como realizar a distribuição dessas rodas de maneira distinta que a descrita em sua configuração preferencial, de modo que, seja fundamental apenas que a base móvel 3 seja capaz de ser movimentada sem dificuldade para o posicionamento do dispositivo 1. [0060] In alternative configurations, the mobile base 3 of the device 1 can comprise another number of wheels 3', as well as carry out the distribution of these wheels in a different way than the one described in its preferred configuration, so that it is only essential that the base mobile 3 is able to be moved without difficulty to position device 1.
[0061] A haste de controle 3” da base móvel 3, consiste em uma haste pivotável fixada perpendicularmente próximo à extremidade traseira da base móvel 3, dotada de um comprimento suficiente para que o colaborador consiga empurrar e manusear a haste de controle 3” em uma posição ergonômica e, assim, realize a movimentação da base móvel 3 e do dispositivo 1 sem necessitar agachar ou ficar em posições não ergonômicas. [0061] The 3" control rod of the mobile base 3, consists of a pivotable rod fixed perpendicularly close to the rear end of the mobile base 3, with a sufficient length for the employee to be able to push and handle the 3" control rod in an ergonomic position and, thus, move the mobile base 3 and device 1 without having to crouch or stand in non-ergonomic positions.
[0062] Desse modo, a movimentação da base móvel 3 é guiada por meio dessa haste de controle 3”, permitindo, inclusive, que o dispositivo 1 seja posicionado abaixo do transportador de correias sem que o colaborador também tenha que entrar debaixo do transportador de correia. [0062] In this way, the movement of the mobile base 3 is guided through this control rod 3", even allowing the device 1 to be positioned below the belt conveyor without the employee also having to enter under the conveyor of belt.
[0063] Em configurações alternativas, a haste de controle 3” pode ser fixada em outras regiões da base móvel 3, assim como ter uma fixação rígida e não pivotável como em sua configuração preferencial, sendo fundamental apenas que a mesma seja capaz de guiar a movimentação da base móvel 3 e, consequentemente, do dispositivo 1. [0063] In alternative configurations, the control rod 3" can be fixed in other regions of the mobile base 3, as well as having a rigid and non-pivoting fixation as in its preferred configuration, being fundamental only that it is able to guide the movement of the mobile base 3 and, consequently, of the device 1.
[0064] O mecanismo de elevação 4, assim como seu nome já infere, consiste no elemento configurado para realizar uma movimentação vertical do suporte de rolos 5 do dispositivo 1, vide a figura 3. Em sua configuração preferencial, o mecanismo de elevação 4 compreende um atuador 4’ e um acionador 4”. [0064] The lifting mechanism 4, as its name implies, consists of the element configured to perform a vertical movement of the roller support 5 of the device 1, see figure 3. In its preferred configuration, the lifting mechanism 4 comprises a 4' actuator and a 4” actuator.
[0065] O atuador 4’ do mecanismo de elevação 4, em sua configuração preferencial, é disposto em uma orientação vertical próximo ao centro da base móvel 3, possuindo uma extremidade fixada à base móvel 3 e a outra extremidade fixada ao suporte de rolos 5. [0065] The actuator 4' of the lifting mechanism 4, in its preferred configuration, is arranged in a vertical orientation near the center of the mobile base 3, having one end fixed to the mobile base 3 and the other end fixed to the roller support 5 .
[0066] Ainda em sua configuração preferencial, o atuador 4’ consiste em um cilindro pneumático que realiza a elevação do suporte de rolos 5 por meio da sua expansão e o seu abaixamento por meio da sua retração. O fluido utilizado para essa movimentação do atuador 4’ e, consequentemente, do suporte de rolos 5 é bombeado ou aliviado por meio do acionador 4”. [0066] Still in its preferred configuration, the actuator 4' consists of a pneumatic cylinder that performs the elevation of the roller support 5 through its expansion and its lowering through its retraction. the fluid used for this movement, the actuator 4' and, consequently, the roller support 5 is pumped or relieved by means of the actuator 4”.
[0067] Em sua configuração preferencial, o acionador 4” consiste em uma espécie de pedal fixado próximo à extremidade posterior da base móvel 3 e, consequentemente, próximo à haste de controle 3”, de modo que, o mesmo possa ser pressionado com o pé do colaborador para bombear o fluido necessário para a expansão do atuador 4’ e, assim, elevar o suporte de rolos 5. [0068] Do mesmo modo, o acionador 4”, quando movimentado em sentido contrário, é capaz de aliviar o atuador 4’ e, assim, retirar o fluido bombeado para o mesmo para que o mesmo retraia e, desse modo, abaixe o suporte de rolos 5 de volta para a sua posição de repouso, ou seja, apenas apoiado sobre o atuador 4’ sobre a base móvel 3. [0067] In its preferred configuration, the trigger 4" consists of a kind of pedal fixed close to the rear end of the mobile base 3 and, consequently, close to the control rod 3", so that it can be pressed with the employee's foot to pump the fluid necessary for the expansion of actuator 4' and, thus, raise the roller support 5. [0068] Likewise, actuator 4", when moved in the opposite direction, is able to relieve the actuator 4' and, thus, remove the fluid pumped into it so that it retracts and, in this way, lowers the roller support 5 back to its rest position, that is, just resting on the actuator 4' on the mobile base 3.
[0069] Em configurações alternativas, o atuador 4’ do mecanismo de elevação 4 pode consistir em outro elemento que não o cilindro pneumático como, por exemplo, um atuador mecânico ou um cilindro hidráulico, assim como o acionador 4” pode consistir em outro elemento que não um pedal acionado pelo pé do colaborador, tendo como função principal apenas realizar essa movimentação na orientação vertical do suporte de rolos 5. [0069] In alternative configurations, the actuator 4' of the lifting mechanism 4 may consist of another element than the pneumatic cylinder, such as a mechanical actuator or a hydraulic cylinder, as well as the actuator 4” may consist of another element other than a pedal activated by the employee's foot, its main function being only to perform this movement in the vertical orientation of the roller support 5.
[0070] Ainda em configurações alternativas o mecanismo de elevação 4 pode compreender outros elementos que não o atuador 4’ e o acionador 4”, sendo fundamental apenas que o mesmo seja capaz de realizar uma movimentação do suporte de rolos 5 na orientação vertical, movimentação essa que é fundamental para auxiliar na troca dos rolos de retomo 2. [0070] Still in alternative configurations, the lifting mechanism 4 may comprise elements other than the actuator 4' and the actuator 4", being fundamental only that it is able to carry out a movement of the roller support 5 in the vertical orientation, movement which is essential to assist in the exchange of return rollers 2.
[0071] A base móvel 3 e o mecanismo de elevação 4 do dispositivo 1, em sua configuração preferencial, consistem basicamente de um macaco do tipo jacaré, amplamente utilizado e difundido no estado da técnica para realizar a elevação de veículos e outras aplicações, conforme exemplificado em maiores detalhes no documento BR202018010807-2. [0071] The mobile base 3 and the lifting mechanism 4 of the device 1, in its preferred configuration, basically consist of an alligator jack, widely used and widespread in the state of the art to carry out the lifting of vehicles and other applications, according to exemplified in greater detail in document BR202018010807-2.
[0072] O suporte de rolos 5, elemento principal do dispositivo 1 da presente invenção, consiste na estrutura configurada para se dispor em contato com o rolo de retomo 2 desgastado para realizar a sua remoção e posicionar o rolo de retomo 2 novo para realizar a sua instalação, vide a figura 3. [0072] Roller support 5, main element of device 1 of the The present invention consists of the structure configured to be arranged in contact with the worn return roll 2 to carry out its removal and position the new return roll 2 to carry out its installation, see figure 3.
[0073] O suporte de rolos 5 também é composto por vigas soldadas e, conforme mencionado anteriormente, é fixado ao mecanismo de elevação 4 do dispositivo 1, preferencialmente por meio de uma fixação rotativa no eixo horizontal, permitindo que o suporte de rolos 5 seja rotacionado em relação à base móvel 3. [0073] The roller support 5 is also composed of welded beams and, as mentioned above, is fixed to the lifting mechanism 4 of the device 1, preferably by means of a rotational fixing on the horizontal axis, allowing the roller support 5 to be rotated with respect to the mobile base 3.
[0074] Em sua configuração preferencial, o suporte de rolos 5 compreende três elementos, os quais: um primeiro elemento 6 configurado para suportar o rolo de retomo 2 novo a ser instalado; um segundo elemento 7 configurado para suportar o rolo de retorno 2 usado após a sua remoção; e um terceiro elemento 8 configurado para realizar a remoção e a instalação do rolo de retomo 2, vide a figura 4. [0074] In its preferred configuration, the roller support 5 comprises three elements, which: a first element 6 configured to support the new return roller 2 to be installed; a second element 7 configured to support the used return roller 2 after its removal; and a third element 8 configured to carry out the removal and installation of the return roller 2, see figure 4.
[0075] O primeiro elemento 6 do suporte de rolos 5, em sua configuração preferencial, consiste em uma chapa plana, a qual possui a sua face inferior fixada junto atuador 4’ do mecanismo de elevação 4 e a face superior configurada para apoiar e suportar o rolo de retomo 2 novo a ser instalado. O primeiro elemento 6 do suporte de rolos 5, ainda em sua configuração preferencial, compreende um suporte de içamento 9, o qual é perpendicularmente fixado próximo a uma das extremidades do primeiro elemento 6. [0075] The first element 6 of the roller support 5, in its preferred configuration, consists of a flat plate, which has its lower face fixed to the actuator 4' of the lifting mechanism 4 and the upper face configured to support and support 2 new return roller to be installed. The first element 6 of the roller support 5, still in its preferred configuration, comprises a lifting support 9, which is fixed perpendicularly close to one of the ends of the first element 6.
[0076] O suporte de içamento 9 é configurado para se dispor em contato direto com a correia do transportador de correias e, assim, fazer com que a correia perca o contato com o rolo de retomo 2 para possibilitar a sua troca. Para evitar um grande atrito entre o suporte de içamento 9 e a correia, o mesmo compreende um rolo 9’ apoiado sobre dois mancais de rolamento, de modo que o rolo 9’ rotacione conforme a correia passe pelo mesmo e, assim, gere menos atrito. [0077] Em configurações alternativas, o primeiro elemento 6 do suporte de rolos 5 pode compreender um formato que não uma chapa plana, sendo fundamental, apenas, que o mesmo seja capaz de suportar o rolo de retorno 2 novo. Além disso, ainda em configurações alternativas, o suporte de içamento 9 pode compreender outros elementos que não o rolo 9’ e os mancais de rolamentos que o suporta. [0076] Lifting bracket 9 is configured to be in direct contact with the belt of the belt conveyor and, thus, cause the belt to lose contact with the return roller 2 to allow its replacement. To avoid great friction between the lifting support 9 and the belt, it comprises a roller 9' supported on two rolling bearings, so that the roller 9' rotates as the belt passes over it and, thus, generates less friction. . [0077] In alternative configurations, the first element 6 of the roller support 5 may comprise a shape other than a flat plate, it being essential only that it is capable of supporting the new return roller 2. Furthermore, even in alternative configurations, the lifting bracket 9 may comprise elements other than the roller 9' and the roller bearings supporting it.
[0078] O segundo elemento 7 do suporte de rolos 5, em sua configuração preferencial, é composto por duas vigas em “U” fixadas à extremidade do primeiro elemento 6 oposta à do suporte de içamento 9, de modo que o segundo elemento 7 fique a uma altura inferior que o primeiro elemento 6, permitindo que o rolo de retorno 2 que foi removido fique apoiado sobre as suas vigas em “U” do segundo elemento 7. [0078] The second element 7 of the roller support 5, in its preferred configuration, is composed of two "U" beams fixed to the end of the first element 6 opposite to that of the lifting support 9, so that the second element 7 is at a lower height than the first element 6, allowing the return roller 2 that was removed to rest on its “U” beams of the second element 7.
[0079] Ainda em sua configuração preferencial, as duas vigas em “U” do segundo elemento 7 são dispostas uma em cada extremidade longitudinal do primeiro elemento 6 do suporte de rolos 5, de modo que o rolo de retomo 2 removido seja capaz de ficar apoiado e disposto no espaço definido entre as duas vigas em “U” do segundo elemento 7. [0079] Still in their preferred configuration, the two "U" beams of the second element 7 are arranged one at each longitudinal end of the first element 6 of the roller support 5, so that the removed return roller 2 is able to stay supported and arranged in the space defined between the two “U” beams of the second element 7.
[0080] Esse formato “U” do segundo elemento 7 do suporte de rolos 5 permite que, ao remover o rolo de retomo 2 desgastado e movimenta-lo até o segundo elemento 7, o mesmo sirva de suporte para movimentar o rolo de retorno 2 novo do primeiro elemento 6 até o terceiro elemento 8 do suporte de rolos 5, vide a figura 5. [0080] This "U" shape of the second element 7 of the roller support 5 allows that, when removing the worn return roller 2 and moving it to the second element 7, it serves as a support to move the return roller 2 from the first element 6 to the third element 8 of the roller support 5, see figure 5.
[0081] Em configurações alternativas, o segundo elemento 7 do suporte de rolos 5 pode compreender outro formato que não as vigas em “U”, sendo fundamental apenas que o mesmo suporte o rolo de retomo 2 desgastado removido e não impeça a movimentação do rolo de retomo 2 novo do primeiro elemento 6 até o terceiro elemento 8 do suporte de rolos 5. [0081] In alternative configurations, the second element 7 of the roller support 5 can comprise a shape other than the "U" beams, it being essential only that it supports the removed return roller 2 and does not impede the movement of the roller of return 2 from the first element 6 to the third element 8 of the roller support 5.
[0082] O terceiro elemento 8 do suporte de rolos 5, em sua configuração preferencial, consiste em duas vigas planas fixadas à extremidade do segundo elemento 7 oposta à que é fixada ao primeiro elemento 6 do suporte de rolos 5, de modo que, o segundo elemento 7 fique disposto entre o terceiro elemento 8 e o primeiro elemento 6 do suporte de rolos 5. [0082] The third element 8 of the roller support 5, in its preferred configuration, consists of two flat beams fixed to the end of the second element 7 opposite to that which is fixed to the first element 6 of the roller support 5, so that the second element 7 is arranged between the third element 8 and the first element 6 of the roller support 5.
[0083] Ainda em sua configuração preferencial, as duas vigas planas do terceiro elemento 8 compreende um sobressalto 8’ fixado em sua extremidade oposta à extremidade fixada ao segundo elemento 7, de modo a impedir que o rolo de retorno 2 apoiado pelo terceiro elemento 8 venha a movimentar-se para outro sentido que não o sentido do segundo elemento 7. [0084] Em configurações alternativas, o terceiro elemento 8 do suporte de rolos 5 pode compreender outro formato que não o de duas vigas planas com um sobressalto 8’ em sua extremidade, sendo essa a sua configuração preferencial apenas para redução de material e de peso do suporte de rolos 5 e, consequentemente, do dispositivo 1. [0083] Still in their preferred configuration, the two flat beams of the third element 8 comprise a cam 8' fixed at its end opposite the end fixed to the second element 7, in order to prevent the return roller 2 supported by the third element 8 will move in a direction other than the direction of the second element 7. [0084] In alternative configurations, the third element 8 of the roller support 5 may comprise a shape other than that of two flat beams with a shoulder 8' at its end, this being its preferred configuration only for material and weight reduction of the roller support 5 and, consequently, of the device 1.
[0085] Desse modo, o terceiro elemento 8 é configurado para se dispor em contato primeiro com o rolo de retomo 2 desgastado, permitindo realizar uma elevação do mesmo por meio do mecanismo de elevação 4 para dissocia-lo do seu suporte e, assim, realizar a sua remoção. Com o rolo de retorno 2 desgastado dissociado e apoiado sobre o terceiro elemento 8, o mesmo é rotacionado manualmente pelo colaborador até alcançar o segundo elemento 7 do suporte de rolos 5 e, assim, ficar disposto apoiado nas vigas em “U” deste. [0085] In this way, the third element 8 is configured to be arranged first in contact with the worn return roller 2, allowing it to be lifted by means of the lifting mechanism 4 to dissociate it from its support and, thus, carry out its removal. With the worn return roller 2 decoupled and supported on the third element 8, it is manually rotated by the employee until it reaches the second element 7 of the roller support 5 and, thus, is arranged supported on the "U" beams thereof.
[0086] O rolo de retomo 2 novo, disposto no primeiro elemento 6 do suporte de rolos 5, é então rotacionado manualmente até o terceiro elemento 8, passando por cima do rolo de retorno 2 desgastado disposto no segundo elemento 7, até alcançar o terceiro elemento 8 do suporte de rolos 5. Então o terceiro elemento 8, junto com o suporte de rolos 5 em geral, é abaixado por meio do mecanismo de elevação 4, permitindo instalar o rolo de retomo 2 novo no seu suporte e, assim, realizar a troca do rolo de retomo 2. [0087] Tendo sido descrito o dispositivo 1 para troca de rolos de retorno 2 da presente invenção e todos os seus elementos e funções, é descrito a seguir o método para troca de rolos de retorno 2 que faz uso do referido dispositivo 1, sendo o mesmo dotado de 8 oito etapas, as quais são detalhadamente descritas a seguir. [0086] The new return roller 2, arranged on the first element 6 of the roller support 5, is then manually rotated to the third element 8, passing over the worn return roller 2 arranged on the second element 7, until reaching the third element 8 of the roller support 5. Then the third element 8, together with the roller support 5 in general, is lowered by means of the lifting mechanism 4, making it possible to install the new return roller 2 on its support and thus carry out the exchange of the return roller 2. [0087] Having described the device 1 for exchanging return rollers 2 of the present invention and all its elements and functions, the method for exchanging return rollers 2 using said device 1 is described below, the even endowed with 8 eight steps, which are described in detail below.
[0088] A primeira etapa consiste em posicionar um rolo de retomo 2 novo, que se deseja instalar no lugar do rolo de retomo 2 desgastado, no primeiro elemento 6 do suporte de rolos 5, de modo que, todas as etapas seguintes do método sejam realizadas já com o rolo de retomo 2 novo posicionado no suporte de rolos 5 do dispositivo 1 , vide a figura 4. [0088] The first step consists of positioning a new return roller 2, which is to be installed in place of the worn return roller 2, on the first element 6 of the roller support 5, so that all the following steps of the method are carried out with the new return roller 2 positioned on the roller support 5 of the device 1 , see figure 4.
[0089] Esse posicionamento do rolo de retomo 2 novo no primeiro elemento 6 do suporte de rolos 5 pode ser realizado manualmente pelo colaborador, ou com o auxílio de outras ferramentas de içamento para realizar a elevação do rolo de retomo 2 novo até o primeiro elemento 6 do suporte de rolos 5. [0089] This positioning of the new return roller 2 on the first element 6 of the roller support 5 can be performed manually by the employee, or with the aid of other lifting tools to carry out the lifting of the new return roller 2 to the first element 6 of the roll holder 5.
[0090] A segunda etapa consiste em posicionar o dispositivo 1 da presente invenção abaixo do rolo de retomo 2 que se deseja substituir. Esse posicionamento é realizado por meio da base móvel 3 do dispositivo 1, permitindo a movimentação do mesmo para posiciona-lo com precisão abaixo do rolo de retomo 2 desgastado que se deseja substituir. [0090] The second step consists of positioning the device 1 of the present invention below the return roller 2 that is to be replaced. This positioning is carried out by means of the mobile base 3 of the device 1, allowing its movement to precisely position it below the worn return roller 2 that is to be replaced.
[0091] Com o dispositivo 1 posicionado, inicia-se a terceira etapa, que consiste em realizar a elevação do suporte de rolos 5 do dispositivo 1 por meio do mecanismo de elevação 4, fazendo com que a terceira parte 8 do suporte de rolos 5 fique em contato com o rolo de retomo 2 desgastado. [0091] With the device 1 positioned, the third step begins, which consists of lifting the roller support 5 of the device 1 through the lifting mechanism 4, making the third part 8 of the roller support 5 contact the worn return roller 2.
[0092] Essa terceira etapa é realizada, na configuração preferencial do dispositivo 1, por meio do acionador 4” que é pressionado pelo colaborador para realizar a expansão do atuador 4’ do mecanismo de elevação 4 e, assim, realizar a elevação do suporte de rolos 5 até que o seu terceiro elemento 8 seja disposto em contato com o rolo de retomo 2 desgastado que se deseja substituir. [0092] This third step is performed, in the preferred configuration of device 1, by means of actuator 4” which is pressed by the employee to carry out the expansion of actuator 4' of the lifting mechanism 4 and, thus, carry out the elevation of the support of rollers 5 until their third element 8 is arranged in contact with the worn return roller 2 that is desired to replace.
[0093] A quarta etapa consiste em dissociar o rolo de retomo 2 desgastado do suporte do mesmo por meio da remoção dos seus elementos de fixação e elevação do terceiro elemento 8 do suporte de rolos 5, fazendo com que o rolo de retomo 2 desgastado seja retirado do seu suporte e fique apoiado sobre o terceiro elemento 8 do suporte de rolos 5, vide a figura 5. [0093] The fourth step consists of dissociating the worn return roller 2 from the support thereof by removing its fixing elements and lifting the third element 8 from the roller support 5, causing the worn return roller 2 to be removed from its support and rests on the third element 8 of the roller support 5, see figure 5.
[0094] Os elementos de fixação do rolo de retomo 2 em seu suporte podem consistir em parafusos ou outros elementos, sendo os mesmos removidos manualmente pelo colaborador com o auxílio de ferramentas especificas, não sendo o objeto da presente invenção e, portanto, não descrito em maiores detalhes. [0094] The return roller 2 fixing elements on its support may consist of screws or other elements, which are manually removed by the employee with the aid of specific tools, not being the object of the present invention and, therefore, not described in greater detail.
[0095] A quinta etapa consiste em movimentar o rolo de retomo 2 desgastado dissociado do terceiro elemento 8 até o segundo elemento 7 do suporte de rolos 5, sendo essa movimentação realizada manualmente pelo colaborador, que rotaciona o rolo de retomo 2 desgastado até que o mesmo fique disposto e apoiado nas vigas em “U” do segundo elemento 7 do suporte de rolos 5, vide a figura 6. [0095] The fifth step consists of moving the worn return roller 2 dissociated from the third element 8 to the second element 7 of the roller support 5, this movement being performed manually by the employee, who rotates the worn return roller 2 until the it is arranged and supported on the “U” beams of the second element 7 of the roller support 5, see figure 6.
[0096] A sexta etapa consiste em movimentar o rolo de retomo 2 novo disposto no primeiro elemento 6 até o terceiro elemento 8 do suporte de rolos 5, sendo essa movimentação também realizada de maneira manual pelo colaborador, rotacionando o rolo de retomo 2 novo sobre o rolo de retomo 2 desgastado disposto no segundo elemento 7 e alcançando até o terceiro elemento 8 do suporte de rolos 5. [0096] The sixth step consists of moving the new return roller 2 arranged in the first element 6 to the third element 8 of the roller support 5, this movement also being performed manually by the employee, rotating the new return roller 2 over the worn return roller 2 arranged on the second element 7 and reaching up to the third element 8 of the roller support 5.
[0097] A sétima etapa consiste em instalar o rolo de retomo 2 novo no seu suporte por meio do abaixamento do terceiro elemento 8 do suporte de rolos 5 através do mecanismo de elevação 4, fazendo com que o rolo de retorno 2 novo fique apoiado em seu suporte para permitir a inserção dos seus meios de fixação e, assim, concluir a instalação do mesmo. [0097] The seventh step consists of installing the new return roller 2 on its support by lowering the third element 8 of the roller support 5 through the lifting mechanism 4, making the new return roller 2 rest on its support to allow the insertion of its fastening means and, thus, complete its installation.
[0098] A oitava e última etapa consiste em realiza o abaixamento completo do suporte de rolos 5 por meio do mecanismo de elevação 4 e remover o dispositivo 1 movimentando-o por meio da base móvel 3, finalizando a atividade de troca do rolo de retorno 2. [0098] The eighth and last step consists of performing the lowering complete the roller support 5 through the lifting mechanism 4 and remove the device 1 by moving it through the mobile base 3, completing the activity of changing the return roller 2.
[0099] Finalizada as oito etapas do método para troca de rolos de retorno 2 descrito acima, o colaborador pode retirar o rolo de retomo 2 desgastado disposto no segundo elemento 7 do suporte de rolos 5 ou realizar o transporte desse rolo de retomo 2 posicionado no próprio dispositivo 1. [0099] After the eight steps of the method for exchanging return rolls 2 described above, the employee can remove the worn return roll 2 arranged in the second element 7 of the roller support 5 or carry out the transport of this return roll 2 positioned in the device itself 1.
[00100] Tendo sido descrito tanto o dispositivo 1 para troca de rolos de retorno 2 quanto o método para troca de rolos de retorno 2 que faz uso do referido dispositivo 1, resta evidente que o mesmo traz vantagens significativas em relação ao estado da técnica. [00100] Having described both the device 1 for exchanging return rollers 2 and the method for exchanging return rollers 2 that makes use of said device 1, it is evident that it brings significant advantages in relation to the state of the art.
[00101] Tais vantagens consistem no aumento da segurança e ergonomia em decorrência do fato de que o colaborador não necessita mais levantar ou suportar o rolo de retomo 2, que possui uma massa elevada, assim como não necessita mais ficar próximo debaixo do transportador de correias para realizar a atividade de troca do rolo de retorno 2, de modo que o único esforço físico realizado pelo colaborador seja para rotacionar o rolo de retomo 2 apoiado sobre o suporte de rolos 5 do dispositivo 1. [00101] Such advantages consist of increased safety and ergonomics due to the fact that the employee no longer needs to lift or support the return roller 2, which has a high mass, as well as he no longer needs to be close under the belt conveyor. to carry out the activity of changing the return roller 2, so that the only physical effort made by the employee is to rotate the return roller 2 supported on the roller support 5 of device 1.
[00102] Outra vantagem alcançada pelo dispositivo 1 para troca de rolos de retomo 2 consiste no aumento da eficiência que é alcançado em decorrência do fato de que todas as etapas envolvidas na troca do rolo de retorno 2 são realizadas com o auxílio do dispositivo 1, possibilitando realiza- las com praticidade e apenas com um único colaborador, diferentemente do estado da técnica em que toda a atividade era realizada de maneira manual e com pelo menos três colaboradores. [00102] Another advantage achieved by device 1 for exchanging return rollers 2 is the increase in efficiency that is achieved as a result of the fact that all steps involved in exchanging return roller 2 are carried out with the aid of device 1, allowing them to be carried out with practicality and only with a single employee, unlike the state of the art in which all the activity was performed manually and with at least three employees.
[00103] Por último, tem-se como vantagem alcançada pelo dispositivo 1 para troca de rolos de retomo 2 o fato do mesmo apresentar uma constmção simples e de baixo custo, sem compreender automatizações e podendo ser empregados em todos os locais. [00104] Sendo assim, a presente invenção mitiga os problemas inerentes dessa atividade no estado da técnica, além de promover melhorias na segurança, ergonomia, eficiência e custo, conforme exposto acima, constituindo um equipamento novo e eficaz. [00103] Finally, the advantage achieved by the device 1 for exchanging return rollers 2 is the fact that it has a simple and low cost construction, without including automation and can be used in all places. [00104] Therefore, the present invention mitigates the inherent problems of this activity in the state of the art, in addition to promoting improvements in safety, ergonomics, efficiency and cost, as explained above, constituting a new and effective equipment.
[00105] Dessa forma, embora tenham sido mostradas apenas algumas modalidades da presente invenção, será entendido que várias omissões, substituições e alterações podem ser feitas por um técnico versado no assunto, sem se afastar do espírito e escopo da presente invenção. As modalidades descritas devem ser consideradas em todos os aspectos somente como ilustrativas e não restritivas. [00105] Accordingly, although only a few embodiments of the present invention have been shown, it will be understood that various omissions, substitutions and alterations may be made by one skilled in the art, without departing from the spirit and scope of the present invention. The described modalities are to be considered in all respects only as illustrative and not restrictive.
[00106] É expressamente previsto que todas as combinações dos elementos que desempenham a mesma função substancialmente da mesma forma para alcançar os mesmos resultados estão dentro do escopo da presente invenção. Substituições de elementos de uma modalidade descrita para outra são também totalmente pretendidas e contempladas. [00106] It is expressly provided that all combinations of elements that perform the same function in substantially the same way to achieve the same results are within the scope of the present invention. Element substitutions from one described embodiment to another are also fully intended and contemplated.
[00107] Assinale-se que os desenhos não estão necessariamente em escala, possuindo natureza meramente conceituai. A intenção da invenção proposta pelo presente pedido pode, portanto, ser limitada, tal como indicado pelo escopo das reivindicações anexas. [00107] It should be noted that the drawings are not necessarily to scale, having a merely conceptual nature. The intent of the invention proposed by the present application may therefore be limited, as indicated by the scope of the appended claims.

Claims

REIVINDICAÇÕES
1. DISPOSITIVO (1) PARA TROCA DE ROLOS DE RETORNO (2) aplicados em transportadores de correias, caracterizado pelo fato de que compreende: 1. DEVICE (1) FOR EXCHANGE OF RETURN ROLLS (2) applied to belt conveyors, characterized in that it comprises:
- uma base móvel (3) configurada para movimentar o dispositivo (1) dotada de quatro rodas (3’) e uma haste de controle (3”); - a mobile base (3) configured to move the device (1) provided with four wheels (3') and a control rod (3");
- um mecanismo de elevação (4) fixado à base móvel (3) configurado para realizar uma movimentação na orientação vertical; e - a lifting mechanism (4) fixed to the mobile base (3) configured to carry out a movement in the vertical orientation; and
- um suporte de rolos (5) fixado ao mecanismo de elevação (4) dotado de: um primeiro elemento (6) configurado para suportar um rolo de retorno (2) novo; um segundo elemento (7), fixado ao primeiro elemento (6), configurado para suportar um rolo de retomo (2) desgastado; e um terceiro elemento (8), fixado ao segundo elemento (7), configurado para suportar um rolo de retomo (2) desgastado e um rolo de retomo (2) novo. - a roller support (5) fixed to the lifting mechanism (4) provided with: a first element (6) configured to support a new return roller (2); a second element (7), fixed to the first element (6), configured to support a worn return roller (2); and a third element (8), fixed to the second element (7), configured to support a worn return roller (2) and a new return roller (2).
2. DISPOSITIVO (1) PARA TROCA DE ROLOS DE RETORNO (2), de acordo com a reivindicação 1, caracterizado pelo fato de que as rodas (3’) da base móvel (3) são fixadas duas na porção frontal da base móvel (3) e duas na sua porção traseira, sendo dispostas duas rodas em cada lado da base móvel (3) e fixadas por meio de um sistema de rodízio para permitir a rotação das rodas (3’) em um sentido horizontal e a haste de controle (3”) da base móvel (3) é fixada perpendicularmente próximo à extremidade traseira da base móvel (3) de maneira pivotável. 2. DEVICE (1) FOR EXCHANGE OF RETURN ROLLS (2), according to claim 1, characterized in that the wheels (3') of the mobile base (3) are fixed two in the front portion of the mobile base ( 3) and two in its rear portion, two wheels being arranged on each side of the mobile base (3) and fixed by means of a caster system to allow the rotation of the wheels (3') in a horizontal direction and the control rod (3”) of the movable base (3) is fixed perpendicularly near the rear end of the movable base (3) in a pivotable manner.
3. DISPOSITIVO (1) PARA TROCA DE ROLOS DE RETORNO (2), de acordo com a reivindicação 1, caracterizado pelo fato de que o mecanismo de elevação (4) compreende um atuador (4’) fixado próximo à base móvel (3) e um acionador (4”) fixado próximo à haste de controle (3”) da base móvel (3). 3. DEVICE (1) FOR EXCHANGE OF RETURN ROLLS (2), according to claim 1, characterized in that the lifting mechanism (4) comprises an actuator (4') fixed close to the mobile base (3) and a trigger (4”) fixed next to the control rod (3”) of the mobile base (3).
4. DISPOSITIVO (1) PARA TROCA DE ROLOS DE RETORNO (2), de acordo com a reivindicação 3, caracterizado pelo fato de que o atuador (4’) consiste em um cilindro pneumático para expandir e retrair e movimentar o suporte de rolos (5) e o acionador (4”) consiste em um pedal para bombear e retirar o fluido do atuador (4’). 4. DEVICE (1) FOR EXCHANGE OF RETURN ROLLS (2), according to claim 3, characterized in that that the actuator (4') consists of a pneumatic cylinder to expand and retract and move the roller support (5) and the actuator (4") consists of a pedal to pump and withdraw the fluid from the actuator (4').
5. DISPOSITIVO (1) PARA TROCA DE ROLOS DE RETORNO (2), de acordo com a reivindicação 1, caracterizado pelo fato de que o primeiro elemento (6) do suporte de rolos (5) consiste em uma chapa plana dotada de um suporte de içamento (9) perpendicularmente fixado próximo a extremidade oposta a qual o segundo elemento (7) é fixado, dotado de um rolo (9’) apoiado em dois mancais de rolamento configurado para se dispor em contato com a correia do transportador de correias. 5. DEVICE (1) FOR EXCHANGE OF RETURN ROLLS (2), according to claim 1, characterized in that the first element (6) of the roller support (5) consists of a flat plate equipped with a support hoist (9) perpendicularly fixed near the opposite end to which the second element (7) is fixed, equipped with a roller (9') supported on two rolling bearings configured to be arranged in contact with the belt of the belt conveyor.
6. DISPOSITIVO (1) PARA TROCA DE ROLOS DE RETORNO (2), de acordo com a reivindicação 5, caracterizado pelo fato de que o segundo elemento (7) do suporte de rolos (5) consiste em duas vigas em “U” dispostas uma em cada extremidade longitudinal do primeiro elemento (6) do suporte de rolos (5). 6. DEVICE (1) FOR EXCHANGE OF RETURN ROLLS (2), according to claim 5, characterized in that the second element (7) of the roller support (5) consists of two "U" beams arranged one at each longitudinal end of the first element (6) of the roller support (5).
7. DISPOSITIVO (1) PARA TROCA DE ROLOS DE RETORNO (2), de acordo com a reivindicação 6, caracterizado pelo fato de que o terceiro elemento (8) do suporte de rolos (5) consiste em duas vigas planas fixadas uma em cada viga “U” do segundo elemento (7) do suporte de rolos (5), dotadas de um sobressalto (8’) próximo a extremidade oposta à fixada ao segundo elemento (7) do suporte de rolos (5). 7. DEVICE (1) FOR EXCHANGE OF RETURN ROLLS (2), according to claim 6, characterized in that the third element (8) of the roller support (5) consists of two flat beams fixed one to each “U” beam of the second element (7) of the roller support (5), provided with a projection (8') near the end opposite to that fixed to the second element (7) of the roller support (5).
8. MÉTODO PARA TROCA DE ROLOS DE RETORNO (2), que faz uso do dispositivo (1) para troca de rolos de retomo (2) da reivindicação 1, caracterizado pelo fato de que compreende as seguintes etapas: i. Posicionar um rolo de retomo (2) novo no primeiro elemento (6) do suporte de rolos (5) do dispositivo (1); ii. Posicionar o dispositivo (1) abaixo do rolo de retomo (2) desgastado a ser substituído por meio da base móvel (3); iii. Elevar o suporte de rolos (5) por meio do mecanismo de elevação (4) até que o terceiro elemento (8) do suporte de rolos (5) tenha contato com o rolo de retomo (2) desgastado; iv. Dissociar o rolo de retomo (2) desgastado do seu suporte por meio da remoção dos seus meios de fixação e elevando o suporte de rolos (5) até que o rolo de retomo (2) desgastado fique apoiado sobre o terceiro elemento (8) do suporte de rolos (5); v. Movimentar o rolo de retorno (2) desgastado dissociado na etapa iii do terceiro elemento (8) até o segundo elemento (7) do suporte de rolos (5); vi. Movimentar o rolo de retomo (2) novo disposto no primeiro elemento (6) até o terceiro elemento (8) do suporte de rolos (5); vii. Instalar o rolo de retomo (2) novo por meio do abaixamento do suporte para rolos (5) através do mecanismo de elevação (4), apoiando o rolo de retorno (2) novo no suporte e colocando os meios de fixação; viii. Abaixar completamente o suporte para rolos (5) por meio do mecanismo de elevação (4) e retirar o dispositivo (1) de baixo do transportador de correias por meio da base móvel (3). 8. METHOD FOR EXCHANGE OF RETURN ROLLS (2), which makes use of the device (1) for exchange of return rollers (2) of claim 1, characterized in that it comprises the following steps: i. Position a new return roller (2) on the first element (6) of the roller support (5) of the device (1); ii. Position the device (1) below the worn return roller (2) to be replaced by means of the mobile base (3); iii. Raise the roller support (5) by means of the lifting mechanism (4) until the third element (8) of the roller support (5) comes into contact with the worn return roller (2); iv. Disconnect the worn return roller (2) from its support by removing its fastening means and lifting the roller support (5) until the worn return roller (2) rests on the third element (8) of the roller support (5); v. Moving the worn return roller (2) decoupled in step iii from the third element (8) to the second element (7) of the roller support (5); saw. Moving the new return roller (2) arranged in the first element (6) to the third element (8) of the roller support (5); vii. Install the new return roller (2) by lowering the roller support (5) through the lifting mechanism (4), supporting the new return roller (2) on the support and placing the fastening means; viii. Fully lower the roller support (5) using the lifting mechanism (4) and remove the device (1) from under the belt conveyor using the mobile base (3).
9. MÉTODO PARA TROCA DE ROLOS DE RETORNO (2), de acordo com a reivindicação 8, caracterizado pelo fato de que a movimentação do rolo de retomo (2) desgastado e do rolo de retomo (2) novo nas etapas v e vi é realizado manualmente pelo colaborador rotacionando os rolos de retomo (2) apoiados sobre o suporte para rolos (5). 9. METHOD FOR CHANGING RETURN ROLLS (2), according to claim 8, characterized in that the movement of the worn return roller (2) and the new return roller (2) in steps v and vi is carried out manually by the employee rotating the return rollers (2) supported on the roller support (5).
PCT/BR2021/050306 2020-08-18 2021-07-19 Device for replacing return rollers and method for replacing return rollers WO2022036423A1 (en)

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BR102020016836-3A BR102020016836A2 (en) 2020-08-18 2020-08-18 Device for changing return rollers and method for changing return rollers

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2452330A (en) * 2007-09-01 2009-03-04 Alan Habberley Belt conveyor with lever-mounted roller
US20140283351A1 (en) * 2013-03-21 2014-09-25 Takraf Gmbh Process and device for replacing idler rollers of a belt conveyor
KR101554110B1 (en) * 2014-09-23 2015-10-01 한전케이피에스 주식회사 Return idler roller exchange device for conveyor belt
WO2018032065A1 (en) * 2016-08-17 2018-02-22 Fonseca Helio Safety support table for the replacement of return rollers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2452330A (en) * 2007-09-01 2009-03-04 Alan Habberley Belt conveyor with lever-mounted roller
US20140283351A1 (en) * 2013-03-21 2014-09-25 Takraf Gmbh Process and device for replacing idler rollers of a belt conveyor
KR101554110B1 (en) * 2014-09-23 2015-10-01 한전케이피에스 주식회사 Return idler roller exchange device for conveyor belt
WO2018032065A1 (en) * 2016-08-17 2018-02-22 Fonseca Helio Safety support table for the replacement of return rollers

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