• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Box lifting device for box stacking machine. The box lifting device comprises a lifting support (5) disposed in a lifting cavity (4) of the box stacking machine. The lifting support (5) is moved vertically by an actuator (6) between a lower position, in which said lifting support (5) is at the level of a transport surface (2a) of an input conveyor (2). ) to receive a box therefrom, and a top position, in which the lifting support (5) transfers the box to a support device. The lifting support (5) is attached to a lifting carriage (34) which carries a slide (47) coupled to a vertical guide (42) fixed to a fixed frame (30) of the machine. At least part of the vertical guide (42) is above the level of the transport surface (2a) of the entrance conveyor (2). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2554839A1
    申请号:ES201430946
    申请日:2014-06-23
    公开日:2015-12-23
    发明作者:Telesforo González Olmos
    申请人:Telesforo González Olmos；
    IPC主号:
    专利说明:

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    DESCRIPTION
    BOX LIFTING DEVICE FOR BOX STACKING MACHINE Technical field
    The present invention concerns a box lifting device for box stacking machine that includes at least one lifting support fixed to a lifting carriage moved by at least one actuator between a lower position and an upper position along at least one Vertical glutton fixed to a fixed frame of the box stacking machine.
    Background of the invention
    In the state of the art, box stacking machines are known which comprise a lifting cavity in which there is a lifting support that is moved vertically by at least one actuator between a lower position, in which the lifting support receives a box from an input conveyor, and an upper position, in which the lifting support transfers the box to a support device, so a stack of boxes is formed supported by the support device by adding successive boxes from below. Above the support device is a pusher that is moved horizontally by at least one other actuator to eject a stack of boxes from the support device to an exit path.
    The boxes to be stacked by the box stacking machine are generally empty boxes made of a semi-rigid sheet material, such as compact cardboard, corrugated cardboard, plastic, corrugated plastic, pen cardboard, and the like. Preferably, the boxes come directly from a box-forming machine that forms the successive boxes from the folding and joining of die-cut plates made of said semi-rigid sheet material.
    In some of these prior art box stacking machines, the actuator is located below the lifting support and comprises a dynamic fluid cylinder provided with an extensible rod and an anti-rotation device that prevents any rotation of the rod around its own axis. The actuator is arranged with the rod in an upright position and the lift stand is connected directly to the end of the rod. A drawback of this arrangement is that the box stacking machine requires having a considerable height from the ground to the lifting stand when it is in the lower position to provide sufficient space for the actuator arranged vertically below the lifting support. . This usually forces
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    to arrange the input conveyor in an inclined position forming a ramp to the lift cavity, as described for example in document ES 2343771 B1.
    In other prior art box stacking machines, the box lifting device comprises two independent lifting supports installed in relation to two mobile side walls defining a width of the lifting cavity, and the two lifting supports are independently operated by respective actuators. A drawback of this provision is that there is a risk that the two lifting supports do not move exactly simultaneously because they are operated by two independent actuators, and this can cause misalignment and jamming of the boxes during the lifting operation.
    Exposition of the invention
    The present invention provides a box lifting device for box stacking machine, comprising at least one lifting support arranged in a lifting cavity of the box stacking machine, wherein said lifting support is moved vertically by at least one actuator between a lower position, in which said lifting support is at a level equal to or lower than a transport surface of an input conveyor to receive a box from said input conveyor, and an upper position, in which the support of elevation transfers said box to a support device on which a stack of boxes is formed.
    The box lifting device of the present invention comprises two of said lifting supports installed on a common lifting carriage comprising a horizontal support crossbar perpendicular to a forward direction of the input conveyor. Said support cross member has two slides attached to two respective vertical glues fixed to the fixed frame on opposite sides of said lifting cavity of the box stacking machine, preferably at a rear end of the fixed frame opposite the input conveyor, so that the lifting carriage carrying the two lifting supports can slide up and down along said vertical glides.
    The box lifting device preferably comprises two of said actuators, each of which has a fixed part connected to the fixed frame and a mobile part connected to one of the ends of the support crossbar.
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    The two elevation supports comprise respective horizontal members parallel to the direction of advance of the input conveyor that define respective support surfaces located in a horizontal plane, and are sized and arranged to receive and lift one or more boxes in each cycle of elevation On the other hand, said support device comprises more than two retractable ones installed in each of two mobile side walls that define a width of the elevation cavity in a direction perpendicular to said forward direction of the input conveyor, and said ones Retractable are arranged so that they can support one or more boxes on a lower level of the pile of boxes.
    The fact that the lifting carriage is guided with respect to the fixed frame by vertical glues independent of the one or more actuators and located at least partially above the level of the transport surface of the input conveyor allows the one or more actuators not They are located below the elevation support but next to the elevation support, which in turn allows to significantly reduce the height from the ground to the elevation support when it is in the lower position and arrange the input conveyor with its surface of transport in a horizontal position.
    In one embodiment, the two actuators are dynamic fluid cylinders with a rod, whose moving parts are extensible rods. The lift carriage has rigid vertical transmission members that extend upwardly from some ends of the support cross member, and the extensible shafts of the actuators are connected to upper ends of these vertical transmission members. In another alternative embodiment, the actuators are dynamic fluid cylinders without a rod, whose moving parts are slides connected directly to opposite ends of the support carriage of the lifting carriage.
    Preferably, the two lifting brackets are fixed to respective secondary carriages, and each of the secondary carriages has a sliding slide fixed to a horizontal glider fixed along the support carriage of the lift carriage, so that the positions of the two lifting supports with respect to the support traverse can be regulated by moving the secondary carriages along the horizontal glide.
    For example, the secondary carriages can be moved manually along the horizontal glide of the support cross member of the lift carriage and can be fixed relative to the support cross member at selected positions along the horizontal glide by means of fixing, such as tightening screws, flanges, or the like.
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    Alternatively, the secondary carriages can have respective drag followers coupled to corresponding vertical guide and drag profiles fixed to mobile side walls of the box stacker, where said mobile side walls define a width of the lift cavity in a direction perpendicular to the feed direction of the input conveyor. The positions of the mobile side walls are adjustable to adapt the box stacking machine to different box sizes. Thus, when the mobile side walls are moved, the secondary cars carrying the lifting supports are moved along with them by the vertical guide and drag profiles.
    Brief description of the drawings
    The foregoing and other features and advantages will be more fully understood from the following detailed description of some examples of realization, which have a merely illustrative and non-limiting character, with reference to the attached drawings, in which:
    Fig. 1 is a perspective view of a box stacking machine that includes a box lifting device in accordance with a first embodiment of the present invention, with lifting stands of the box lifting device arranged in a lower position ;
    Fig. 2 is a perspective view showing a rear part of the box stacking machine of Fig. 1 with the lifting supports of the box lifting device arranged in the lower position, where some elements of the machine have been omitted to better show the box lifting device;
    Fig. 3 is an enlarged view of detail III of Fig. 2.
    Fig. 4 is a partial perspective view illustrating a second embodiment of the box lifting device, with the lifting supports of the box lifting device arranged in an upper position.
    Fig. 5 is a side elevational view of the box stacking machine of Fig. 1 with the lifting supports of the box lifting device arranged in the lower position; Y
    Fig. 6 is a side elevation view of the box stacking machine of Fig. 1 with the lifting supports of the box lifting device arranged in the upper position.
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    Detailed description of an example of realization
    Referring firstly to Figs. 1, 2, 3, 5 and 6, the reference sign 50 generally designates a box stacking machine that includes a box lifting device according to a first embodiment of the present invention. The box stacking machine 50 comprises a fixed frame 30 and an auxiliary frame 31 provided with wheels 32. On the auxiliary frame 31 an input conveyor 2 is provided provided with an endless belt that is moved in a forward direction D by a motor (not shown). The input conveyor 2 has a horizontal transport surface 2a. In use, the input conveyor 2 is placed under a molding cavity of a box forming machine (not shown), so that successive boxes formed by the forming machine are ejected from the molding cavity and fall on the surface of transport 2a of the input conveyor 2.
    The auxiliary frame 31 of the input conveyor 2 comprises lateral structures 18 on which are installed input glues 1 that direct the boxes moved by the input conveyor 2 towards an elevation cavity 4 located inside the fixed frame 30 a through an inlet opening 58 in the fixed frame 30. The inlets 1 have deflectors 33 located in a region close to a distal end thereof. The elevation cavity 4 is defined laterally by two mobile side walls 3 parallel to the direction of advance D. Within the cavity of elevation 4 there is a final stop 7 defining a box insertion limit for the one or more boxes that are introduced into the cavity of elevation 4 in a direction parallel to the direction of advance D.
    A pair of elevation brackets 5 (better shown in Fig. 2) are installed in said elevation cavity 4, which comprise respective horizontal members, parallel to the forward direction D, adjacent to the two movable side walls 3, and which define respective support surfaces located in a horizontal plane. The two elevation supports 5 are connected to a lifting carriage 34 located at one end of the fixed frame 30 opposite the inlet conveyor 2.
    As shown in Figs. 2 and 3, the lift carriage 34 carrying the elevation supports 5 comprises a horizontal support cross member 45, perpendicular to the forward direction D. This support cross member 45 has two sliders 47, which are respectively coupled to two glues. verticals 42 fixed to the fixed frame 30 on opposite sides of said elevation cavity 4 at said end of the fixed frame 30 opposite the
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    input conveyor 2. Almost the entire length of the vertical glides 42 is located above the level of the transport surface 2a of the input conveyor 2.
    In the embodiment shown, the box lifting device comprises two actuators 6 constituted by dynamic fluid cylinders with a rod. Each of the actuators 6 has a fixed part 6a connected to the fixed frame 30 and a mobile part 6b constituted by an extensible rod connected to the lift carriage 34. To this end, the lift carriage 34 has a pair of rigid vertical transmission members 46 that they extend upward from opposite ends of the support cross member 45, so that the lift carriage 34 has a general "U" shaped configuration, and the extensible rods constituting the movable parts 6b of the actuators 6 are connected to ends superiors of vertical transmission members 46.
    As illustrated in Figs. 5 and 6, an activation of the actuators 6 moves the lift carriage 34 along the vertical glides 42 between a lower position (Fig. 5), in which the lifting supports 5 are substantially flush with the transport surface 2a of the input conveyor 2 to receive one or more boxes C from the input conveyor 2, and an upper position (Fig. 6), in which the lifting supports 5 transfer the one or more boxes C to a support device that it comprises a plurality of retractiles 35 installed in said movable side walls 3 that define a width of the lift cavity 4. Thus, the successive boxes C are added from below to a stack of boxes that is supported by the retractiles 35 of the support device.
    In the embodiment shown, in order to adapt the box stacking machine to different box sizes, the positions of the movable side walls 3 with respect to the fixed frame 30 and the position of the end stop 7 inside the lift cavity 4 they can be regulated by means of mechanisms operated by respective first and second hand-operated cranks 14, 27 in cooperation with corresponding first and second couplings 15, 26 (Fig. 1), or alternatively by motor groups (not shown). Thus, the lifting supports 5 can receive one, two, three or more boxes C (represented by broken lines in Figs. 5 and 6) in each lifting cycle, depending on the positions of the movable side walls 3 and the stop final 7.
    In each of the mobile side walls 3 there are more than two retractable ones 35 (six in the embodiment shown), and the retractable ones 35 are arranged so that they can support one, two, three or more boxes C in the lower part of the pile of boxes, or in other words, can support one, two, three or more piles of adjacent boxes. Figs. 5 and 6 show
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    the end stop 7 positioned so that the lifting supports 5 receive two boxes C in each lifting cycle and four of the retractable ones 35 of each side wall 3 support the two boxes C at the lower level of the stack of boxes.
    Above the level of the support device there is a pusher 36 fixed to an ejector carriage 37 that runs along a glide 38 parallel to the direction of travel D and which is moved horizontally by an actuator 39 to eject the stack of boxes from the device support towards an exit path comprising exit gulas 40 fixed to the movable side walls 3. The exit gulas 40 are provided with support rollers 41.
    In positions adjacent to the inlet opening 58 there are retractable inlet stops 59 (Fig. 1). Elastic elements 60 (Fig. 2) permanently push the input stops 59 towards a retention position above the level of the transport surface 2a of the input conveyor 2. The lifting support 5, when moved to the lower position , pushes the input stops 59 towards a retracted position below the level of the transport surface 2a of the input conveyor 2 against the force of the elastic elements 60 allowing the entry of boxes into the lifting cavity 4. When the support of Elevation 5 is moved to the upper position, the input stops 59 are released and pushed into a retention position by the elastic elements 60 preventing the entry of boxes into the lifting cavity 4.
    To regulate the position of the movable side walls 3 with respect to the fixed frame 30, the box stacking machine comprises a pair of horizontal glides 9 perpendicular to the direction of advance D fixed frame fixed 30 and located at a level lower than the surface of transport 2a of the inlet conveyor 2. Each of the mobile side walls 3 has fixed slides 11 (see also Fig. 3) slidably coupled to the corresponding horizontal glides 9 so that the mobile side walls 3 can move to the lengths of the horizontal glues 9 keeping their positions parallel to the direction of advance D.
    In the fixed frame 30 a pair of spindles 12 perpendicular to the direction of advancement D are rotatably installed, each of which has first and second threaded portions 12a, 12b with opposite thread directions. The movable side walls 3 have respective first and second nuts 13a, 13b attached to each of said first and second threaded portions 12a, 12b with opposite thread directions of the spindles 12, so that a rotation of the spindles 12 causes movements of the mobile side walls 3 in opposite directions along the horizontal glues 9.
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    The spindles 12 can be turned simultaneously by a mechanism actuated by the aforementioned first hand-operated crank 14.
    Along the support cross member 45 a horizontal glide 48 is fixed and each lift support 5 is fixed to a secondary carriage 51 that has a slide 49 fixedly slidably coupled to the horizontal glide 48 fixed to the support cross member 45. Asl , the positions of the secondary carriages 51 and their corresponding lifting supports 5 can be adjusted according to the positions of the mobile side walls 3. As best shown in Fig. 3, in the illustrated embodiment, the mobile side walls 3 have vertical glutton and drag profiles 62 are fixed and each of the secondary carriages 51 has a drag follower 63 attached to one of the vertical glutton and drag profiles 62.
    Thus, the secondary carriages 51 carrying the lifting supports 5 move together with the mobile side walls 3 when they are moved in a direction perpendicular to a direction of advancement D by the spindles 12, and the positions of those of the secondary carriages 51 that carry the lifting supports 5 in a direction perpendicular to the forward direction D are maintained by the vertical gliding and drag profiles 62 when the lift carriage 34 is moved up and down along the vertical glides 42 while the walls mobile sides 3 are in stationary positions.
    In an alternative embodiment not shown, the vertical glutton and drag profiles 62 and the drag followers 63 are omitted, so that the secondary carriages 51 can be moved manually along the horizontal glutton 48, and the secondary carriages 51 are associated with fixing means, such as tightening screws, flanges, or the like, whereby the secondary carriages 51 are fixed with respect to the support cross member 45 of the lift carriage 34 at selected positions along the horizontal glider 48 relative to the positions of the movable side walls 3.
    The position of the input glues 1 with respect to the auxiliary frame 31 of the input conveyor 2 can also be adjusted in order to adapt the box stacking machine to different box sizes. Preferably, the distal ends of the inlets 1 are connected to the auxiliary frame 31 by respective vertical axis joints and the proximal ends of the inlets 1 are linked to the movable side walls 3, so that the inclinations of the Inlet guides 1 with respect to the auxiliary frame 31 vary together with the movements of the movable side walls 3 in the direction perpendicular to the direction of advance D.
    Fig. 4 shows a second embodiment, which is essentially analogous to the first embodiment shown in Figs. 1, 2, 3, 5 and 6, except that here the actuators 6 that drive the movements of the lift car 34 are dynamic fluid cylinders without a rod, each of which has a fixed part 6a constituted by an elongated cylinder body 5 and a mobile part 6b constituted by a slide that is moved along the elongated cylinder body. The fixed parts 5a of the actuators 6 are fixed to the fixed frame 30 and the mobile parts 6b are directly connected to opposite ends of the support cross member 45 of the lift carriage 34. With this second embodiment, the vertical transmission members 46 fixed to opposite ends of the support cross member 45 and 10 connected to the actuator stems 6, which in the first embodiment shown in Figs. 1, 2, 3, 5 and 6 protrude from the top of the fixed frame 30 when the lift carriage 34 is in the upper position.
    In Fig. 4, the entrance guides 1, the movable side walls 3 and the lifting supports 5 and are positioned by the way to handle boxes of an allowable minimum size 15. The entrance guides 1 are inclined accordingly in convergent directions towards the lift cavity 4 whose width is restricted by the movable side walls 3.
    The scope of the present invention is defined in the appended claims.
    权利要求:
    Claims (10)
    [1]
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    1. - Box lifting device for box stacking machine, comprising at least one lifting support (5) arranged in a lifting cavity (4) of the box stacking machine, where said lifting support (5) is moved vertically by at least one actuator (6) between a lower position, wherein said lifting support (5) is at a level equal to or lower than a transport surface (2a) of an input conveyor (2) to receive a box (C) from said input conveyor (2), and an upper position, in which the lifting support (5) transfers said box (C) to a support device on which a stack of boxes is formed, characterized by comprising two of said lifting supports (5) installed on a common lifting carriage (34) comprising a horizontal support cross member (45) perpendicular to a forward direction (D) of the input conveyor (2), and said support crossbar (45) is fixed d The sliders (47), which are coupled to two respective vertical glues (42) fixed to the fixed frame (30) on opposite sides of said lifting cavity (4) of the box stacking machine.
    [2]
    2. - Box lifting device according to claim 1, characterized in that the lifting supports (5) comprise respective horizontal members parallel to the direction of advance (D) defining respective support surfaces located in a horizontal plane.
    [3]
    3. - Box lifting device according to claim 2, characterized in that the support cross member (45) has a horizontal glider (48) fixed, the lifting supports (5) are fixed to respective secondary carriages (51), and each of said secondary carriages (51) has a slide (49) attached slidably to said horizontal glutton (48).
    [4]
    4. - Box lifting device according to claim 3, characterized in that said secondary carriages (51) have respective drag followers (63) coupled to corresponding vertical glutton and drag profiles (62) fixed to mobile side walls (3) defining a width of the lift cavity (4) in a direction perpendicular to said feed direction (D) of the input conveyor (2).
    [5]
    5. - Box lifting device according to claim 3, characterized in that said secondary carriages (51) are associated with fixing means by which the secondary carriages (51) can be fixed with respect to the support cross member (45) of the lifting carriage (34) in selected positions along the horizontal glide (48).
    [6]
    6. - Box lifting device according to any one of the preceding claims, characterized in that said vertical guides (42) are fixed to the fixed frame (30) at one end of the fixed frame (30) opposite the input conveyor (2) .
    [7]
    7. - Box lifting device according to any one of the preceding claims 5, characterized in that it comprises two of said actuators (6), each of the
    which has a fixed part (6a) connected to the fixed frame (30) and a mobile part (6b) connected to one of the ends of the support cross member (45) of the lifting carriage (34).
    [8]
    8. - Box lifting device according to claim 7, characterized in that the lifting carriage (34) comprises vertical transmission members (46) which are
    10 extend upwards from the support cross member (45), and said actuators (6) are cylinders of dynamic fluid with a rod, whose moving parts (6b) are extensible rods connected to upper ends of said vertical transmission members (46 ).
    [9]
    9. - Box lifting device according to claim 7, characterized in that said actuators (6) are dynamic fluid cylinders without a rod, whose moving parts (6b) are
    slides connected to ends of the support crossbar (45).
    [10]
    10. - Box lifting device according to any one of the preceding claims, characterized in that the lifting supports (5) are sized and arranged to receive and lift one or more boxes in each lifting cycle and said
    20 support device comprises more than two retractable (35) installed in each of two mobile side walls (3) defining a width of the lift cavity (4) in a direction perpendicular to said forward direction (D) of the inlet conveyor (2), said retractable (35) being arranged to support one or more boxes at a lower level of the stack of boxes.
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    同族专利:
    公开号 | 公开日
    ES2554839B1|2016-09-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3039624A|1958-04-01|1962-06-19|M & C Conveyors Inc|Adjustable case stacker|
    GB1096671A|1963-05-22|1967-12-29|Dawson Bros Ltd|Improvements relating to stacking and unstacking machines for crates, boxes and the like|
    US3478897A|1967-10-12|1969-11-18|Fmc Corp|Pallet stacking apparatus|
    US3904045A|1972-12-27|1975-09-09|Thibault Jacques G A|Machine for loading packages on a pallet|
    EP1262428A1|2001-05-30|2002-12-04|G.D Societ Per Azioni|Package stacking apparatus|
    CN110550433A|2019-09-04|2019-12-10|博众精工科技股份有限公司|Two-group three-station battery cell linkage conveying mechanism and using method thereof|
    法律状态:
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    2016-11-22| PC2A| Transfer of patent|Owner name: TELESFORO GONZALEZ MAQUINARIA SLU Effective date: 20161116 |
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    2019-07-01| GD2A| Contractual licences|Effective date: 20190701 |
    2021-06-15| GD2A| Contractual licences|Effective date: 20210615 |
    优先权:
    申请号 | 申请日 | 专利标题
    ES201430946A|ES2554839B1|2014-06-23|2014-06-23|Box lifting device for box stacking machine|ES201430946A| ES2554839B1|2014-06-23|2014-06-23|Box lifting device for box stacking machine|
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