• 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:
    Gripper (9) for gripping a hollow body (2), which comprises a gripper body (12), a pair of jaws (13) mounted articulated with respect to the gripper body (12) about axes (A1, A2) of respective parallel rotation, and a device (17) for magnetic return of the jaws (13), comprising a pair of magnets (18, 19) in magnetic opposition, magnetic axes parallel to the axes of rotation of the jaws (13). ), able to solicit opening or closing, the clamp (9) thus having two stable positions, open and closed, in which the magnets (18, 19) are off-axis.
    公开号:FR3045584A1
    申请号:FR1562496
    申请日:2015-12-16
    公开日:2017-06-23
    发明作者:Roux Julien Le
    申请人:Sidel Participations SAS；
    IPC主号:
    专利说明:

    The invention relates to the transport of hollow bodies, and more particularly to the transport of preforms in a production line of plastic containers (such as bottles). The invention concerns the transport of hollow bodies such as a container preform or a container. , vials, cans) or the transport of the containers themselves.
    More specifically, the invention relates to a gripping pliers of a hollow body, typically intended to be mounted on the periphery of a transfer wheel. Such a clamp is generally equipped with a pair of movable jaws between a gripping position in which the jaws are brought together to retain (and suspend) the hollow body, and a release position in which the jaws are spaced to allow the release of the hollow body.
    Given the speed of rotation of the wheel, proportional to the rate of production (from several tens of thousands of containers per hour at the present time, which represents a few thousand closing cycles closing for each clamp), the clamp must meet strict specifications: the hollow body must be held both firmly and without risk of damage, the opening and closing movements of the clamp must be carried out smoothly, the mass of the clamp must be contained, so as to limit the inertia of the wheel.
    Many models of pliers are known.
    Thus, a first known type of clamp is equipped with a spring that urges the clamp in the closed position, and a roller circulating on a cam path, which, via a link transmission mechanism (cf. eg EP 2 686 259 or its US equivalent US 2014/008927, both in the name of Sidel) or gear (see eg EP 1 867 600, also in the name of Sidel), order the opening of jaws against the return force of the spring.
    This first type of clamp has been proven but does not go without drawbacks, mainly related to the presence of the spring. First, the spring weighs down the clamp. Then, the many efforts of compression and relaxation repeated (tens of thousands of cycles per day of production) lead to mechanical fatigue may cause breakage of the spring. Finally, it is complex to properly size the spring, which must be stiff enough to allow rapid closure of the clamp (necessary to prevent the hollow body from escaping, but at the cost of a higher mass), while being flexible enough to facilitate the introduction of the hollow body (necessary to limit the risk of scratches or damage to the hollow body, at the cost of greater slowness of operation, may limit the rates).
    A second type of clamp, known from WO 201 3/0641 98A1 (KHS), saves the transmission mechanism by replacing a sliding ejector provided with magnets which, placed opposite magnets in magnetic opposition integrated into the jaws, solicit these towards their position of liberation.
    This second type of clamp has the advantage of facilitating the opening of the clamp through magnets in magnetic opposition, but it does not, however, the economy of a return spring that solicits the jaws to their gripping position. The aforementioned problems are therefore not solved.
    A first goal is to lighten the grips of hollow bodies.
    A second objective is to improve the reliability of the hollow body grippers.
    A third objective is, more specifically, to provide a gripper gripping no spring (that is to say a mechanical elastic return member). For this purpose, it is proposed a grasping forceps of a hollow body, which comprises: a clamp body; a pair of jaws mounted hinged relative to the clamp body about respective parallel axes of rotation, between a release position in which the jaws are spaced from each other to receive or release a hollow body, and a position gripper in which the jaws are brought closer to each other and define a housing for the hollow body so as to grip it; a magnetic return device comprising at least one pair of magnets in magnetic opposition, able to urge the jaws towards their release position or, conversely, towards their gripping position; in this clamp: the magnetic return device comprises at least one fixed magnet secured to the clamp body, having a magnetic axis parallel to the axis of rotation of the jaws, and at least one movable magnet coupled to at least one of the jaws , having a magnetic axis parallel to the axis of rotation of the jaws; each movable magnet is movable relative to the clamp body between a first end position in which the movable magnet is offset from the fixed magnet and biases at least one jaw towards its gripping position, and a second end position in which the movable magnet is offset relative to the fixed magnet in a direction opposite to the first end position and urges at least this jaw towards its release position.
    Thanks to this architecture, and in particular thanks to the design of the magnetic return device, the clamp is devoid of spring. This results in a lightening of the clamp, the benefit of the inertia of the wheel that is equipped, its reliability (no spring breakage) and the rate of production that can be accelerated.
    Various additional features may be provided, alone or in combination: the clamp comprises: an actuator carrying the movable magnet, this actuator being movable in translation relative to the clamp body between a retracted position, corresponding to the gripping position of the jaws wherein the actuator is recessed relative to the housing, and an extended position corresponding to the jaw release position, wherein a front end of the actuator protrudes into the housing; a pair of links each coupling a jaw to the actuator. each link is, by an outer end, articulated with respect to a jaw and, by an inner end, articulated relative to the actuator; the magnetic return device comprises a pair of fixed magnets disposed on either side of the actuator, facing the movable magnet; the moving magnet is spherical; by their inner ends, the rods are hinged relative to the actuator about a common axis; the clamp comprises a roller integral with the actuator, adapted to cooperate with a cam; each jaw carries a movable magnet and is secured to a lever which, in gripping position of the jaw, is recessed relative to the housing and which, in the release position of the jaw protrudes into the housing. Other objects and advantages of the invention will become apparent in the light of the description of an embodiment, given hereinafter with reference to the accompanying drawings in which: FIG. 1 is a perspective view of a transfer wheel equipped, on its periphery, with a series of gripping tongs; Figure 2 is a top view of a gripper, shown in open configuration, spaced apart jaws; Figure 3 is a view similar to Figure 2, showing the clamp in closed configuration, jaws close together; Figure 4 is a bottom view of the clamp of Figure 2, in open configuration; Figure 5 is a bottom view of the clamp of Figure 3, in closed configuration; Figure 6 is a perspective sectional view showing the clamp of Figure 2 in open configuration; Figure 7 is a perspective sectional view showing the clamp of Figure 3 in closed configuration; Figure 8 is a detail sectional view illustrating the magnetic return device in the open configuration of the clamp; Figure 9 is a view similar to Figure 8, showing the magnetic return device in the closed configuration of the clamp; Figure 10 is a schematic top view illustrating a gripper according to another embodiment, shown in open configuration, spaced jaws; Figure 11 is a view similar to Figure 10, showing the clamp in closed configuration, jaws close together.
    FIG. 1 shows a hollow body transfer wheel 1 integrated in a container production line. In the following, the hollow bodies 2 shown are preforms, from which containers must be formed by blow molding or stretch blow molding, the wheel being for example a preform feed wheel in a blower. Reference 2 will be used later to designate one or more preform (s), but wheel 1 could be used to carry other types of hollow bodies, e.g. Intermediate containers (blanks) or completely formed containers as they exit a blower.
    Each preform 2 comprises a cylindrical body 3 closed by a hemispherical bottom 4, and, opposite the bottom 4, an open neck 5 separated from the body 3 by a flange 6 projecting radially.
    As can be seen in FIG. 1, the wheel 1 comprises a disc 7 on the periphery of which are mounted (by being fastened, for example by means of screws 8), regularly spaced tongs 9, configured to grip the preforms 2 by their necks. 5. According to an embodiment illustrated in FIG. 1, each preform 2 is provided with a peripheral rib 10 surmounting the flange 6 and which defines therewith a groove 11 intended to receive a tamper-evident ring integrated into a stopper closing the container once it filled. This groove 11 is, in the illustrated example, used to achieve the capture of the preform 2. In another mode of use (not shown), the clamp can grasp the preform under the flange 6 (located under the neck 5 ).
    Each gripper 9 comprises, first of all, a gripper body 12 by which the gripper 9 is fixed on the disc 7 of the wheel 1 by means of the screws 8. The gripper body 12 is advantageously made of an aluminum alloy or in a high performance plastic material, especially in a polyacetal, typically polyoxymethylene (POM).
    The gripper 9 comprises, secondly, a pair of jaws 13 mounted articulated with respect to the gripper body 12 about axes A1, A2 of respective parallel rotation, between: a release position (on the right in FIG. 2; FIG. 4), in which the jaws 13 are spaced from each other to receive a preform 2 at a point of charge and release it at a discharge point; a gripping position (on the left in FIG. 1; FIG. 3; FIG. 5), in which the jaws 13 are brought closer to each other and define a housing 14 for the preform 2 so as to grip it at from the point of charge to the point of discharge.
    The housing 14 defined by the jaws 13 in the gripping position is adapted to the contour of the gripping area of the preform 2. In this case, this contour is circular; it is therefore by a circle that the housing 14 has been represented in FIGS. 2 and 4 (in dashed lines) and in FIGS. 3 and 5 (in solid lines, coinciding with the contour of the preforming zone of the preform 2). For this purpose, each jaw 13 has, on the side of a front end, a recess 16 in an arc whose radius corresponds to that of the preform 2 at its neck 5 (or under its flange 6).
    The jaws 13 are advantageously made of a metallic material, e.g. steel or aluminum alloy.
    The clamp 9 comprises, thirdly, a magnetic return device 17 including at least one pair of magnets 18, 19 in magnetic opposition, able to urge the jaws 13 towards their gripping position or, conversely, towards their release position , as we will see below.
    More specifically, the magnetic return device 17 comprises: at least one fixed magnet 18, integral with the clamp body 12, whose magnetic poles are respectively and arbitrarily marked N (north) and S (south), and having a magnetic axis M1 primary (NS) parallel to the axis A1 (respectively A2) of rotation of the jaws 13, at least one magnet 19 movable relative to the body 12 of clamp being coupled to at least one of the jaws 13 (that is, that is to say that the movement of the movable magnet 19 is coupled to that of this jaw 13), having a secondary magnetic axis M2 (NS) parallel to the axis A1 (respectively A2) of rotation of the jaws 13 (and therefore to the magnetic axis M1 of the fixed magnet 18).
    Each movable magnet 19 is displaceable, relative to the clamp body 12 (and therefore with respect to the fixed magnet 18), between: a first end position in which the movable magnet 19 is offset relative to the fixed magnet 18 and urges the jaw (s) 13 towards the release position, and a second end position in which the movable magnet 19 is off-axis with respect to the fixed magnet 18 in a direction opposite to the first extreme position and urges at least the (or) jaws 13 to the gripping position.
    According to a first embodiment, illustrated in Figures 2 to 9, the clamp 9 comprises an actuator 20 carrying the movable magnet 19, and a pair of rods 21 each coupling a jaw 13 to the actuator 20. The actuator 20 and the rods 21 together form a transmission mechanism 22 controlling the opening and closing of the jaws 13.
    More precisely, each link 21 is, by an external end 23, hinged to a jaw 13 about an external axis B1 parallel to the axis A1 (respectively A2) of articulation of the jaw 13, and, by an internal end 24 articulated with respect to the actuator 20 about an internal axis B2 parallel to the external axis B1. According to a preferred embodiment, illustrated in FIGS. 6 and 7, the internal axis B2 is common to the two links 21. In this case, and as can be seen in FIGS. 6 and 7, the link rods 21 are advantageously provided with either side of the actuator 20, which is traversed by the internal axis B2 (which, in practice, is in the form of a pin).
    In the example shown, the actuator 20 is in the form of a rod, advantageously made of a metallic material (for example steel or an aluminum alloy). The actuator 20 has a front section which extends between the jaws 13 and on which are articulated the rods 21, and a distal section 26 through which the actuator 20 is slidably mounted in a bore 27 formed in the body 12 of forceps, preferably with the interposition of wear rings 28 made of a material having a low coefficient of friction, e.g. Brass. The actuator 20 is thus mounted displaceable in translation relative to the clamp body 12 between: an extended position, corresponding to the release position of the jaws 13 (FIG. 2), in which the movable magnet 19 is in its first extreme position and wherein a front end 29 of the actuator protrudes into the housing 14; a retracted position, corresponding to the gripping position of the jaws 13, in which the movable magnet 19 is in its second end position and in which the actuator 20 is set back relative to the housing 14.
    As can be seen in FIGS. 2 to 5, the actuator 20 carries, at a distal end projecting from the clamp body opposite the end end 29, a washer 31 fixed by a nut 32. This washer 31, with a diameter greater than that of the bore 27, forms a limit stop which unilaterally blocks the actuator 20 in the extended position, which in turn unilaterally blocks the jaws 13 in the release position (FIGS. 2, 4, 6).
    FIGS. 6 and 8 show that, in this position, the secondary magnetic axis M2 is offset from the primary magnetic axis M1 towards the front end 29 of the actuator 20, that is to say towards the jaws 13. In view of this shift and the magnetic opposition in which the magnets 18, 19 (their poles of the same sign facing each other) are located, the moving magnet 19 is subjected to an effort having not only a component parallel to the magnetic axes M1, M2 (axial component), but also a component perpendicular to the axes M1, M2 (referred to as the transverse component), directed in the direction of the offset of the secondary magnetic axis M2 with respect to the axis M1 primary magnet, that is to say, in this case, in the direction favoring the opening of the jaws 13.
    According to a preferred embodiment illustrated in FIGS. 6 and 8, the magnetic return device 17 comprises a pair of fixed magnets 18 secured to the clamp body 12, arranged on either side of the actuator 20, facing each other. of the magnet 19 movable and in magnetic opposition thereof. These two fixed magnets 18 are advantageously identical and coaxial, and are spaced apart from the moving magnet 19 of the same gap.
    In this case, the axial components of the forces exerted by the fixed magnets 18 on the moving magnet 19 cancel each other out, since they have the same value and opposite directions (thus balancing the movement of the actuator), while the transverse components add up to form a global transverse component T1 increasing the useful motor force exerted on the actuator 20.
    In the retracted position, the actuator 20 is, conversely, blocked unilaterally by the jaws 13, themselves unilaterally blocked in the gripping position by the preform 2 which they enclose.
    FIGS. 7 and 9 show that, in this position, the secondary magnetic axis M2 is offset from the primary magnetic axis M1 towards the distal end of the actuator 20, that is to say opposite the jaws 13. Given this shift and the magnetic opposition in which are the magnets 18, 19 (their poles of the same sign, N, respectively S, facing each other), the mobile magnet 19 is subjected to a force having not only a component parallel to the axes M1, M2 (axial component), but also a component perpendicular to the axes M1, M2 (transverse component), directed in the direction of the offset of the secondary magnetic axis relative to to the primary magnetic axis M1, that is to say, in this case, in the direction favoring the closure of the jaws 13.
    As above, in the case where, as in the example illustrated, the magnetic return device 17 comprises a pair of fixed magnets 18 integral with the clamp body 12, arranged on either side of the actuator 20 , opposite the magnetic magnet 19 and in magnetic opposition thereof, the axial components of the forces exerted by the fixed magnets 18 on the movable magnet 19 cancel each other out, since they have the same value and opposite directions, while the transverse components add up to form a global transverse component T2 increasing the useful motor force exerted on the actuator 20.
    Thus, the magnetic return device 17 exerts on the actuator 20 (and therefore on the jaws 13): in the release position of the jaws 13, a return force tending to open them; it follows that the release position is stable, the washer 31 ensuring the unilateral blocking of the actuator 20 (and thus the jaws 13) in this position; in the gripping position of the jaws 13, a return force tending to tighten them; it follows that this position is also stable, the preform 2 ensuring the unilateral locking of the jaws 13 (and therefore the actuator 20) in this position.
    Thus, the clamp 9 is bistable: stable in the release position of the jaws 13 and stable in the gripping position. The magnetic return device 17 thus acts as a couple of coaxial return springs which would be alternately activated / inhibited. The inversion of the direction of the return force exerted on the actuator 20 (via the movable magnet 19) occurs when the magnetic axis M1 and the magnetic axis M2 are momentarily merged during the (forced) passage of the actuator 20 from its deployed position to its retracted position, or vice versa. The "neutral" position is called the (unstable) position of the actuator 20 where the magnetic axis M1 and the magnetic axis M2 coincide.
    It is advantageous to promote the instability of the dead point, so as to limit the forces that it is necessary to exert on the actuator 20 to force its passage from its deployed position to its retracted position and vice versa. For this purpose, it is advantageous that the movable magnet 19 is spherical, which limits the peak of transverse force in the vicinity of the dead point (axes M1, M2 almost coincidental) while affecting little the value of the forces exerted on the actuator 20 by the magnetic return device 17 in the retracted or extended position.
    Starting from the release position, the closure of the jaws 13 is caused by the support of the preform 2 against the front end 29 of the actuator 20. The latter is dimensioned so that its end 29 protrudes into the housing 14 by a distance greater than the offset of the secondary magnetic axis M2 relative to the primary magnetic axis M1. In this way, when the preform 2 is properly positioned in its housing 14, the actuator 20 has passed its dead point and is biased towards its retracted position by the return force exerted by the magnetic return device 17, this which, via the transmission mechanism 22, comes to tighten the jaws in the gripping position around the preform 2. Conversely, starting from the gripping position, the actuator 20 is moved away from its retracted position until it passes the dead point. Therefore, the return force exerted by the magnetic return device 17 on the actuator 20 tends to move it to its deployed position. While, via the transmission mechanism 22, the jaws 13 are spaced towards their release position, the front end 29 of the actuator 20 enters the housing 14 and pushes the preform 2 to promote its ejection of the clamp 9. For this purpose, the gripper 9 is advantageously provided with a roller 33 secured to the actuator 20, adapted to cooperate with a cam 34 (schematized in dashed lines in FIG. 4), positioned locally in the vicinity of the discharge point of the wheel 1.
    This cam 34 however remains small since the clamp 9 is stable in its two positions, open (corresponding to the release position of the jaws 13) and closed (corresponding to the gripping position of the jaws 13). It is therefore not necessary to have a current cam path on the entire periphery of the wheel 1.
    Each preform 2 reaching tangentially (in the direction indicated in FIG. 1 by the arrow F1) at the point of load is positioned between the open jaws 13 of a clamp 9 as the wheel (in the direction indicated in Figure 1 by the arrow F2). The support of the preform 2 against the front end 29 of the actuator 20 then causes, as described above, the closure of the jaws 13 on the preform 2 and the immobilization thereof in the clamp 9.
    Various modifications can be made to the clip 9 which has just been described. In particular, it is conceivable, to increase the forces exerted on the jaws 13 especially in the gripping position, to provide it with at least two mobile magnets (and at least as many corresponding fixed magnets). It is thus possible to mount a series of movable magnets 19 in the actuator 20, and a series of magnets 18 fixed, in magnetic opposition of the moving magnets 19, in the body 12 of the clamp.
    According to a second embodiment, illustrated in Figures 10 and 11, the clamp 9 is devoid of sliding actuator; each jaw 13 carries a movable magnet 19 and is secured to a lever 35 which, in the gripping position of the jaw 13, is set back relative to the housing 14 and which, in the release position of the jaw 13, protrudes into the housing 14.
    In the illustrated example, the levers 35 overlap, the preform 2 pushing them together when it is positioned in its housing 14. In this example, the levers 35 extend in the extension of the axes A1, A2 of rotation of the jaws 13, but they could be offset with respect to them.
    The clamp body 12 incorporates a fixed magnet 18 facing each movable magnet 19, in magnetic opposition thereof. The trajectory of the movable magnets 19 is circular but, given its small angular amplitude with respect to the spacing between the axis A1 (respectively A2) of rotation of the jaw 13 and the movable magnet 19, this trajectory can be considered quasi -linear. Although the clamp 9 is devoid of a transmission mechanism, the operating principle is the same as that of the clamp described above. The clamp 9 is bistable, the jaws 13 being urged alternately towards their opening or towards their closure according to their position (respectively of release, figure 10, or of gripping, figure 11), by the return force generated by the device 17 of magnetic reminder. From the release position, the closure of the clamp 9 is achieved by the depression in its housing 14 of the preform 2 which pushes the levers 35, which thus rotate the jaws 13 about their axes A1, A2 of respective rotation to exceed the dead point (magnetic axes of magnets 18 19 combined). Therefore, the return force exerted by the magnetic return device 17 exerts on each jaw 13 a torque which tends to tighten it around the preform 2. The gripping position is stable, the preform 2 itself providing a stop unilateral limiting the stroke of the jaws 13. Conversely, from the gripping position, a force exerted on at least one of the jaws 13 is necessary to cause opening. In the illustrated example, one of the jaws 13 carries a roller 33 adapted to cooperate with a cam 34 (dotted in Figure 10) located in the vicinity of the discharge point of the wheel 1. The cooperation of the roller 33 with the cam 34 causes the pivoting of this jaw 13 (and thus the ejection of the preform 2 via the lever 35, the preform 2 itself causing the pivoting of the other jaw 13 and thus contributing to its own ejection via the lever 35 corresponding), against the return force of the magnetic return device 17, until the passage of the neutral point. Therefore, the return force is reversed and contributes to the opening of the jaws 13 (and thus the ejection of the preform 2 via the levers 35), until the release position is reached. The stroke of the jaws 13 is limited unilaterally, in this position, by their abutment against each other at the rear ends 36, as illustrated in FIG.
    The clip 9 which has just been described provides several advantages. First, it is devoid of mechanical spring, for the benefit of its weight. The magnets 18, 19 have a weight but it is possible to minimize it, e.g. using rare earth magnets, neodymium-iron-boron type, which generate strong and durable magnetic fields for a contained weight.
    The reduction in the weight of the clamp 9 reduces the inertia of the wheel 1, to the benefit, first, of its reliability and durability and, secondly, production rates.
    Then, the spring effect provided by the magnetic return device 17 being made without contact, this results in a reduction of the contact friction zones within the gripper 9 (in particular, there is no contact between the magnets 18, 19). This results in a reduction of wear and mechanical fatigue of the movable components of the clamp 9, to the benefit of its reliability and durability.
    Finally, the clamp 9 being bistable, the action of the roller 33 on the cam 34 may be limited to a zone of the wheel 1 circumscribed in the vicinity of the discharge point, to the benefit of reducing wear, simplicity and the reliability of the entire production line.
    权利要求:
    Claims (8)
    [1" id="c-fr-0001]
    1. Gripper (9) for gripping a hollow body (2), which comprises: a clamp body (12); a pair of jaws (13) mounted articulated with respect to the clamp body (12) about respective parallel axes of rotation (A1, A2), between a release position in which the jaws (13) are spaced apart; the other for receiving or releasing a hollow body (2), and a gripping position in which the jaws (13) are brought closer to each other and define a housing (14) for the hollow body (2) of to grip this one; a device (17) for magnetic return comprising at least one pair of magnets (18, 19) in magnetic opposition, able to urge the jaws (13) to their release position or, conversely, to their gripping position; said clamp (9) being characterized in that the magnetic return device (17) comprises at least one fixed magnet (18) integral with the clamp body (12), having a magnetic axis (M1) parallel to the axis ( A1, A2) for rotating the jaws (13), and at least one movable magnet (19) coupled to at least one of the jaws (13), having a magnetic axis (M2) parallel to the axis (A1, A2 ) rotation of the jaws (13); and in that each movable magnet (19) is displaceable relative to the clamp body (12) between a first end position in which the movable magnet (19) is off-axis with respect to the fixed magnet (18) and urges the minus one of the jaws (13) to its release position, and a second end position in which the movable magnet (19) is off-axis with respect to the magnet (18) fixed in a direction opposite to the first extreme position and urges at least this jaw (13) towards its gripping position.
    [2" id="c-fr-0002]
    2. Pliers (9) according to claim 1, characterized in that it comprises: an actuator (20) carrying the magnet (19) movable, this actuator (20) being movable in translation relative to the body (12) of clamp between an extended position, corresponding to the release position of the jaws (13), wherein a front end (29) of the actuator (20) projects into the housing (14), and a retracted position, corresponding to the gripping position of the jaws (13), wherein the actuator (20) is recessed relative to the housing (14); a pair of links (21) each coupling a jaw (13) to the actuator (20).
    [3" id="c-fr-0003]
    3. Pliers (9) according to claim 2, characterized in that each link (21) is, by an outer end (23), hinged relative to a jaw (13) and, by an end (24) internally articulated relative to the actuator (20).
    [4" id="c-fr-0004]
    4. Gripper (9) according to claim 3, characterized in that, by their ends (24) internal, the links are articulated relative to the actuator (20) about a common axis.
    [5" id="c-fr-0005]
    5. Pliers (9) according to one of claims 2 to 4, characterized in that the device (17) for magnetic return comprises a pair of magnets (18) fixed on either side of the actuator ( 20) opposite the moving magnet (19).
    [6" id="c-fr-0006]
    6. Gripper (9) according to claim 5, characterized in that the magnet (19) is spherical mobile.
    [7" id="c-fr-0007]
    7. Gripper (9) according to one of claims 2 to 6, characterized in that it comprises a roller (33) integral with the actuator (20), adapted to cooperate with a cam (34).
    [8" id="c-fr-0008]
    8. Pliers (9) according to claim 1, characterized in that each jaw (13) carries a magnet (19) movable and is integral with a lever (35) which, in gripping position of the jaw (13), is recessed relative to the housing (14) and which, in the release position of the jaw (13), protrudes into the housing (14).
    类似技术:
    公开号 | 公开日 | 专利标题
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    FR2803234A1|2001-07-06|METHOD FOR INTRODUCING A PISTON INTO A CYLINDER OF AN INTERNAL COMBUSTION ENGINE AND DEVICE FOR CARRYING OUT THIS METHOD
    WO2018007712A1|2018-01-11|Device for performing an operation on a product, comprising a tool capable of following a path of the product
    FR3082898A1|2019-12-27|ASSEMBLY OF A PIECE RECEIVING A TREE INSIDE IT AND PIN FOR HOLDING THE TREE
    FR2785271A1|2000-05-05|Plastics bottle and container gripper comprizes fork with rotary arms switching from rest to work to grip settings under incoming bottle pressure.
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    同族专利:
    公开号 | 公开日
    EP3181496B1|2018-12-12|
    EP3181496A1|2017-06-21|
    US9878483B2|2018-01-30|
    CN106882594A|2017-06-23|
    CN106882594B|2020-07-24|
    US20170173843A1|2017-06-22|
    FR3045584B1|2018-01-12|
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    法律状态:
    2016-11-21| PLFP| Fee payment|Year of fee payment: 2 |
    2017-06-23| PLSC| Search report ready|Effective date: 20170623 |
    2017-11-21| PLFP| Fee payment|Year of fee payment: 3 |
    2018-11-27| PLFP| Fee payment|Year of fee payment: 4 |
    2020-11-20| ST| Notification of lapse|Effective date: 20200911 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1562496A|FR3045584B1|2015-12-16|2015-12-16|PREVENTION FORCE OF HOLLOW BODY SUCH AS PREFORM OF CONTAINER OR CONTAINER|
    FR1562496|2015-12-16|FR1562496A| FR3045584B1|2015-12-16|2015-12-16|PREVENTION FORCE OF HOLLOW BODY SUCH AS PREFORM OF CONTAINER OR CONTAINER|
    EP16306677.2A| EP3181496B1|2015-12-16|2016-12-14|Clamp for gripping a hollow body such as a container preform or container|
    US15/381,737| US9878483B2|2015-12-16|2016-12-16|Clamp for gripping a hollow body such as a container preform or a container|
    CN201611163510.6A| CN106882594B|2015-12-16|2016-12-16|Gripping gripper for container preforms or hollow bodies of containers|
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