• 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:
    The invention relates to a sensor device and a method for detecting an abnormal condition of a waste ribbon in a weaving machine comprising a block (2) with a guide element (3) for the waste ribbon, wherein in a normal state of the waste ribbon, the block (2) is mounted in a nominal position, the block (2) being slidably mounted along a path of movement of the waste ribbon so that the block (2) can be shifted from the nominal position in a direction opposite to the normal direction of movement of the waste ribbon by forces act on the block (2) in the aforementioned direction opposite to the normal direction of movement of the waste ribbon.
    公开号:BE1026547B1
    申请号:E20190061
    申请日:2019-07-09
    公开日:2020-08-06
    发明作者:Sebastiaan Verrept；Koenraad Vandecasteele
    申请人:Picanol Nv；
    IPC主号:
    专利说明:

    [0001] The invention relates to a sensor device and a method for detecting an abnormal condition of a waste ribbon in a weaving machine.
    [0002] JP 56-103076-U shows a weaving machine with a sensor device for detecting a tension drop of a scrap ribbon including a lever pivotably disposed about a pivot axis, the lever being held in a first position at a distance from a contact by an anti-gravity release ribbon acting on the lever, and due to the forces of gravity, the lever is pivoted to a second position, in which the lever contacts the contact, in case a tension in the release ribbon falls below a set value. the invention.
    [0003] It is the object of the invention to provide a sensor device and a method for detecting an abnormal condition of a waste ribbon in a weaving machine.
    [0004] This object is solved by the device and the method having the features of claims 1 and 9.
    [0005] According to a first aspect, there is provided a sensor device for detecting an abnormal state of a scrap ribbon in a weaving machine comprising a block having a scrap ribbon guiding element, wherein in a normal state of the scrap ribbon, the block is disposed in a nominal position. , and wherein the block is slidably mounted along a path of movement of the waste ribbon so that the block can be shifted from the nominal position in a direction opposite to the normal direction of movement of the waste ribbon by forces acting on the block in said direction opposite to the normal direction of movement of the waste ribbon.
    [0006] The waste ribbon makes contact with the block at the level of the guide element. Thus, in use, in a normal condition | the waste ribbon applies a force on the block in its direction of movement. In an abnormal state, forces acting on the block in an opposite direction could be applied by a waste ribbon being pulled back, that is, pulled in a direction opposite to its normal direction of movement, for example where the waste ribbon is clamped between a fabric rewinder.
    [0007] The waste ribbon guide element is, in one embodiment, a guide groove. In other embodiments, the guide element is a guide eye.
    [0008] In one embodiment, a proximity sensor is provided, wherein a presence or absence of the block in the nominal position is detectable by the proximity sensor. In one embodiment, the block has a detection face, the block is considered to be disposed in the nominal position as long as the detection face is disposed within a certain area opposite the proximity sensor, i.e. as long as the detection face is detectable by the proximity sensor.
    [0009] In preferred embodiments, at least in the region of the sensor device, the waste ribbon is moved along an at least substantially linear path of movement, the block being slidably mounted along a linear path. In one embodiment, a guide shaft is provided, wherein the block is slidably mounted on the guide shaft along the guide shaft. In the context of the application, a movement “along the guide axis” describes a movement in the axial direction of the guide axis. The block is provided with a groove or a through hole that receives the guide shaft. The guide axis is arranged at least substantially parallel to the path of movement of the waste ribbon.
    [0010] In one embodiment, the guide shaft is mounted between the wings of a mounting bracket, in particular between two wings of a mounting bracket, each wing being provided with a guide element for the waste ribbon. The two guide elements define a path of movement of the waste ribbon.
    [0011] In one embodiment, the block is movable along the full length of the guide axis between the wings of the disassembly support. In preferred embodiments, movement of the block in the normal direction of movement of the waste ribbon toward a first wing of the mounting bracket is limited by a stop member. In normal conditions, the waste ribbon s, in use, exerts a force on the block in its direction of movement by forcing the block against the stop member. The stop element ensures precise and repeatable positioning of the block in the nominal position.
    [0012] In one embodiment, the block has only one degree of freedom, which means that movement of the block is limited to movement along the path of movement of the waste ribbon. In preferred embodiments, the block is further rotatable mounted on the guide shaft, applying a force to the block | arranged to rotate the block about the guide axis from the nominal position, and wherein the block is held in the nominal position against said force by a release ribbon having a predefined tension. In other words, the block is both slidable from the nominal position and rotatable from the nominal position, each of the movements from the nominal position being detectable, for example by means of the proximity sensor. In one embodiment, the guide axis is mounted horizontally, with the forces of gravity acting on the block to rotate the block about the guide axis from the nominal position. Alternatively or in addition, in embodiments of the invention, biasing force elements, such as spring elements, are provided to urge the block out of the nominal position. In this case, in one embodiment, the guide shaft is not arranged horizontally.
    [0013] In preferred embodiments, the block is provided with a detection face, the block is considered to be disposed in the nominal position as long as the detection face is disposed within a certain area. The block is slidable at least so that the detection plane can be moved out of the determined area. In embodiments, the block is also rotatable so that the detection plane can be moved out of the defined area. "
    [0014] In one embodiment, the block waste ribbon guide element is a guide eye, an axis of said guide eye and a rotation axis of the block being in a center plane of the block, and the detection plane being asymmetrical with respect to the center plane applied. With this design, an angle of rotation with which the detection plane is moved out of the particular area depends on the orientation in which the block is mounted on the guide shaft. Hereby, by removing the block from the guide shaft, rotating the block 180 ° and reassembling the block on the guide shaft, a sensitivity of the sensor device to deviations in a drop-off ribbon voltage can be changed.
    [0015] According to a second aspect, there is provided a method for detecting an abnormal condition of a waste ribbon in a weaving machine, wherein the waste ribbon is passed through a block, which block is slidably disposed along a path of movement of the waste ribbon, in a normal manner. condition of the waste ribbon the block is arranged in a nominal position, and where the waste ribbon is moved in a direction opposite to its normal direction of movement, the waste ribbon exerts a force on the block in said direction opposite to the normal direction of movement of the waste ribbon and the block is moved from the nominal position in the said direction opposite to the normal direction of movement of the waste ribbon.
    [0016] In one embodiment, a presence or absence of the block in the nominal position is detected by a proximity sensor.
    [0017] In one embodiment, the block is movable only along a path of movement of the waste ribbon. Additionally, in preferred embodiments, the block is rotatably disposed about an axis of rotation extending at least substantially parallel to the path of movement of the waste ribbon, a force being applied to the block to rotate the block about the axis of rotation from the nominal position, and wherein the block is held against said force in the nominal position by a release ribbon having a predefined tension.
    [0018] In the following, embodiments of the invention will be described in detail with reference to the drawings. Throughout the drawings, like elements are referred to by like reference numbers.
    [0019] Figures 1 to 8 show a first embodiment of a sensor device 1 for detecting an abnormal condition of a waste ribbon (not shown) at a weaving machine.
    [0020] The sensor device 1 contains a block 2 with a guide element 3 for the waste ribbon. The block 2 is mounted on a guide shaft 4. In the embodiment shown, the block 2 is slidably and rotatably mounted on the guide axis 4, so that the block 2 can slide along the guide axis 4 and rotate about the guide axis 4.
    [0021] The sensor device 1 comprises a mounting bracket 5 with two parallel wings 6 and a collar girder 11 arranged perpendicular to the two wings 6.
    [0022] The guide shaft 4 is mounted between the wings 6 of the mounting bracket 5, in the embodiment shown the guide shaft 4 is mounted on the mounting bracket 5 by means of bolts 14, 15. Each wing 6 is provided with a guide element 7 for the waste ribbon.
    [0023] In the embodiment shown, the guide shaft 4 is provided with a stop element 8, whereby a movement of the block 2 towards a first wing 6 of the mounting support 5, which is shown on the right in figure 1, is limited by the stop element 8. The other wing 6 is hereinafter referred to as second wing 6.
    [0024] The sensor device 1 further includes a proximity sensor 9 with a cable 12 mounted on the collar girder 11 of the mounting bracket. The proximity sensor 9 cooperates with a detection surface 10 of the block 2 as will be explained in more detail below.
    [0025] In the embodiment shown, the guide element 3 of the block 2 and the guide elements 7 in the wings 6 are guide eyes, a waste ribbon (not shown) being wired through the guide element 7 provided at the level of the second wing 6 (left in Figure 1), through the guide element 3 of the block 2 and through the guide element 7 provided at the level of the first wing 6. As a result, in normal operation, the waste ribbon is moved from left to right in Figure 1, whereby the moving waste ribbon has a exerts force on the block 2, which forces the block 2 towards the stop element 8.
    [0026] The terms "left" and "right" used in the context of the application are only used to describe a position of elements with respect to each other and do not limit the positioning of the sensor device 1 on a weaving machine.
    [0027] An axis 17 of the guide element 3 of the block 2 and a rotation axis 18 of the block 2 lie in a central plane 13, indicated by a dotted line. The block 2 shown in Figures 1 to 8 is provided with three indicia 16, two indicia 16 being provided on a common first part of the block 2 relative to the center plane, and one indication 16 on an opposite second part of the block 2 is provided.
    [0028] The guide axis 4 is arranged horizontally, gravity forces acting on the block 2 causing a rotation of the block 2 about the guide axis 4 until equilibrium is reached. In case a scrap ribbon with a sufficient tension is wired through the guide elements 3 and 7, a rotation of the block 2 is avoided. In case a tension of the waste ribbon drops, the block 2 will rotate about the guide axis 4 as a result of the forces of gravity acting on the block 2. In the embodiment shown, a center of gravity of the block 2 and the detection face 10 are arranged on opposite sides of the guide shaft 4, i.e. when the center of gravity is moved downward, the detection face 10 is moved upward. In other embodiments, the center of gravity of the block 2 and the detection plane 10 are arranged on the same side of the block 2 relative to the guide axis 4.
    [0029] Figures 1, 2, 4, 6 and 8 show a normal state of a waste ribbon, with the detection face 10 being disposed opposite the proximity sensor 9. In the context of the application, the block 2 is considered to be disposed in a nominal position as long as the detection face 10 is disposed within a certain area, and thus is detectable by the proximity sensor 9.
    [0030] The sensor device 1 shown in the figures is suitable for detecting two different abnormal states.
    [0031] Figures 3 and 5 show a first abnormal state in which the block 2 is moved along the guide axis 4 from the nominal position. Such movement of the block 2 is caused by forces acting on the block 2 in a direction opposite to the normal direction of movement of the waste ribbon, i.e. from right to left in Figure 1. Such forces are applied to the block 2, for example as the waste ribbon is moved in a direction opposite to its normal direction of movement, i.e. from right to left in Figures 1 and 4.
    [0032] Figure 7 shows a second abnormal state, where the block 2 is rotated about the guide axis 4 from the nominal position shown in Figure 6. Such rotation of the block 2 is caused, for example, by gravitational forces acting on the block 2, in case a waste ribbon tension is not sufficient to balance the forces of gravity.
    [0033] As shown in Figures 6 and 8, the detection face 10 is arranged asymmetrically with respect to the center face 13. The block 2 can be mounted on the guide shaft 4 in two orientations as shown in Figures 6 and 8, the orientations are rotated 180 ° with respect to each other. A sensitivity to deviations in the release ribbon tension depends on the orientation of the block 2.
    [0034] Figure 6 shows a first orientation, also referred to as sensitive arrangement, in which the first part of the block 2 provided with two indicia 16 is arranged above the second part of the block 2 provided with only one indication 16. In that orientation, the detection plane 10 extends only a short distance down from a neutral position, in which the center plane 13 is aligned with a central axis of the proximity sensor 9. Thus, a small rotation of the block 2 about the guide axis 4 causes the detection plane 10 up and out of the range of the proximity sensor 9. In other words, if the block 2 rotates a small amount, then a signal from the proximity sensor 9 is already falling.
    [0035] Figure 8 shows a second orientation, also referred to as non-sensitive arrangement, in which the first part of the block 2 provided with two indicia 16 is arranged under the second part of the block 2 provided with only one indication 16, wherein the indicia 16 are not visible in Figure 8. With that orientation, compared to the sensitive arrangement, the detection plane 10 extends a greater distance down from a neutral position, in which the center plane 13 is aligned with a central axis of the proximity sensor 9 Thus, in comparison with the sensitive arrangement, the block 2 can rotate about the guide axis 4 by a greater angle before a signal from the proximity sensor 9 will drop. In other words, when an end of the block 2 opposite the detection plane 10 is moved downward due to gravity and the detection plane 10 is moved upward, the proximity sensor 9 continues to measure a signal even if the block 2 has been rotated a larger angle in comparison. with the sensitive setup.
    [0036] The sensor device 1 shown in Figures 1 to 8 is preferably arranged on the right side of a weaving machine,
    [0037] Figure 9 is a front perspective view of a second embodiment of a sensor device 1 for detecting an abnormal condition of a waste ribbon in a weaving machine, which is preferably disposed on a left side of a weaving machine, with the waste ribbon in a normal condition moves from right to left. The sensor device 1 shown in Figure 9 mainly corresponds to the sensor device 1 shown in Figures 1 to 8 and corresponding reference characters are used for the same or similar elements.
    [0038] In contrast to the embodiment shown in Figures 1 to 8, in the embodiment of Figure 9 the stop element 8 is provided on the second wing 6, shown to the left in Figure 9. In normal operation, the waste ribbon (not shown) is removed from moved right to left in the drawing plane by forcing the block 2 against the stop element 8.
    权利要求:
    Claims (11)
    [1]
    A sensor device for detecting an abnormal condition of a waste ribbon in a weaving machine comprising a block (2) with a guide element (3) for the waste ribbon, wherein in a normal state of the waste ribbon, the block (2) is in a nominal position and wherein the block (2) is slidably mounted along a path of movement of the waste ribbon, so that the block (2) can be shifted from the nominal position in a direction opposite to the normal direction of movement of the waste ribbon by forces acting on the block (2) in said direction opposite to the normal direction of movement of the waste ribbon.
    [2]
    Sensor device according to claim 1, characterized in that a proximity sensor (9) is provided, wherein a presence or absence of the block (2) in the nominal position is detectable by the proximity sensor (9).
    [3]
    Sensor device according to Claim 1 or 2, characterized in that a guide axis (4) is provided, wherein the block | (2) is mounted slidably along the guide shaft (4) on the guide shaft (4).
    [4]
    Sensor device according to claim 3, characterized in that a mounting bracket (5) with two wings (6) is provided, the guide shaft (4) being mounted between the wings (6) of the mounting bracket (5), each wing (6) ) is provided with a guide element (7) for the waste ribbon, wherein in particular the guide elements (7) are aligned with respect to each other along an axis extending parallel to the guide axis (4).
    [5]
    Sensor device according to claim 4, characterized in that a movement of the block (2) in the normal direction of movement of the waste ribbon towards a first wing (6) of the mounting support (5) is limited by a stop element (8).
    [6]
    Sensor device according to any one of claims 3 to 5, characterized in that the block (2) is mounted rotatably on the guide axis (4), whereby a force is applied to the block (2) around the block (2) about the guide axis. (4) to be rotated out of the nominal position, and wherein the block (2) is held in the nominal position against said force by a release ribbon having a predefined tension.
    [7]
    Sensor device according to claim 6, characterized in that the block (2) is provided with a detection surface (10), the block (2) being considered to be arranged in the nominal position as long as the detection surface (10) is within a certain area. applied.
    [8]
    Sensor device according to Claim 7, characterized in that the guide element (3) for the waste ribbon of the block (2) is a guide eye, an axis of said guide eye and a rotation axis (18) of the block (2) in a central plane ( 13) of the block (2), and wherein the detection surface (10) is arranged asymmetrically with respect to the center plane (13).
    [9]
    A method for detecting an abnormal condition of a waste ribbon in a weaving machine, wherein the waste ribbon is passed through a block (2), which block (2) is slidably disposed along a path of movement of the waste ribbon, in a normal state of the waste ribbon the block (2) is arranged in a nominal position, and wherein when the waste ribbon is moved in a direction opposite to its normal direction of movement, the waste ribbon exerts a force on the block (2) in said direction opposite the normal direction of movement of the waste ribbon and the block (2) is moved in said direction opposite to the normal direction of movement of the waste ribbon from the nominal position.
    [10]
    Method according to claim 9, characterized in that a presence or absence of the block (2) in the nominal position is detected by a proximity sensor (9).
    [11]
    Method according to claim 9 or 10, characterized in that the block (2) is arranged rotatably about an axis of rotation (18) extending at least substantially parallel to the path of movement of the waste ribbon, whereby a force is applied to the block (2) to rotate the block (2) about the axis of rotation (18) from the nominal position, and wherein the block (2) is held in the nominal position against said force by a waste ribbon having a predefined tension.
    类似技术:
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    同族专利:
    公开号 | 公开日
    BE1026547A1|2020-03-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPS5245070U|1975-09-18|1977-03-30|
    JPS56103076U|1980-01-08|1981-08-12|
    EP2570530A1|2011-09-14|2013-03-20|Starlinger & Co Gesellschaft m.b.H.|Warp stop motion detector and circular loom|
    法律状态:
    2020-09-03| FG| Patent granted|Effective date: 20200806 |
    优先权:
    申请号 | 申请日 | 专利标题
    EP18074174|2018-09-07|
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