Wire diagnosis device

Abstract

Disclosed is a wire diagnosis device comprising: a diagnosis unit through which a wire passes in the vertical direction, and which has a sensor for inspecting the state of the passing wire; and a bracket having one side fixedly coupled to a lift platform, and having the other side fixed such that the relative position thereof to the diagnosis unit is variable, wherein the diagnosis unit has coupling pins protruding outward in the front-rear direction at the side portions thereof, the bracket has, at a bracket side plate, a slit in which the coupling pins are movable in the left-right direction within a predetermined range while the coupling pins pass therethrough, and the slit is formed in an arc shape so that the angle between the diagnosis unit and the bracket on the side surface extending in the left-right and up-down directions can be changed to be within a predetermined range. According to the present invention, a relative-coupling form of the wire diagnosis device and the lift platform to which the device is coupled is changed from a fixed form to a variable form, and thus damage to the wire and the wire diagnosis device and the possibility of a wire state diagnosis error can be reduced.

Description

Wire diagnostic device

[0001] The present invention relates to a wire diagnostic device coupled to a platform in a hoisting device that can lift an object using a wire, and more specifically, to a coupling structure between the platform and the wire diagnostic device.

[0002] In general, a hoisting device that can lift an object using a wire, and that uses the principle of a movable pulley to reduce the force to lift a heavy load, is composed of a support placed at a relatively high position, a winding drum rotatably connected to the support and having a wire wound around its circumference, a driving motor that drives the winding drum, an upper sheave rotatably connected to the support, a platform provided on the lower side of the support, and a lower sheave connected to the platform, and the wire passes through the circumferences of the upper sheave and the lower sheave sequentially and the tip is fixed to the support.

[0003] The lower part of the elevator is equipped with a hook, so that an object can be hung on the hook and lifted. The upper and lower sheaves are configured in the form of wheels with concave grooves formed on the circumference. Therefore, when an object is hung on the hook, the winding drum is rotated forward and backward by the driving motor to wind up or unwind the wire, and the upper and lower sheaves work together to raise and lower the object as the elevator is raised and lowered.

[0004] In such lifting devices, if the wire used to lift the object is damaged and breaks, a major accident may occur, so a means to diagnose the condition of the wire in real time is needed, and a wire diagnostic device has been developed and used as a means for such diagnosis.

[0005] This wire diagnostic device (1000) is mainly installed and used on the side of the elevator (110) that is relatively easy to install, as shown in FIG. 1, especially at the location where the wire enters and exits the elevator.

[0006] However, when the wire is stretched out long, the attitude of the elevator (110) may change and vibration may occur depending on the surrounding environment or the operating status of the hoisting device, such as the operation of the crane or the operation of the drive motor for hoisting the wire.

[0007] Such changes in the attitude or vibration of the elevator can result in changes in the relative positions and angles of the wire and the elevator around the point where the wire enters or exits the elevator. For example, if the wire is quickly wound or unwound, the elevator may rotate clockwise or counterclockwise around the center of the roller in Fig. 1. Even in this case, the wire tends to remain vertical, and since the diagnostic device is fixed to the elevator, the wire bends at a large angle at the top of the diagnostic device.

[0008] Meanwhile, the wire diagnostic device fixed to the elevator must be able to move the wire within the wire diagnostic device while in contact with the wire in a certain state due to its functional characteristics.

[0009] Therefore, changes in posture or vibration of the wire of the elevator can cause changes in partial mechanical tension or manpower between the elevator and the wire diagnosis device, changes in the bonding state between the wire diagnosis device and the wire, changes in mutual angles, and diagnostic errors due to changes in the diagnostic state of the wire diagnosis device, damage to the wire diagnosis device, and diagnostic errors resulting from such changes, which can be problematic.

[0010] The present invention aims to provide a diagnostic device having a configuration capable of reducing and preventing the possibility of damage and wire condition diagnosis errors due to movement or change in status of a platform in the conventional wire diagnostic device described above, and in particular, a diagnostic device configuration for determining a joint form between a platform and a wire diagnostic device.

[0011] The wire diagnostic device of the present invention to achieve the above purpose

[0012] A diagnostic unit having a sensor for inspecting the state of the wire passing through the wire in an up-and-down direction, and a bracket fixedly connected to a platform on one side and fixed so as to be able to move the position of the diagnostic unit on the other side,

[0013] The diagnostic unit has a coupling pin that protrudes outward in the front-back direction from the side,

[0014] The bracket is characterized in that it has a slit through which a coupling pin penetrates the bracket side plate and allows the coupling pin to move left and right within a certain range, and the slit is formed in an arc shape so that the mutual angle between the diagnostic part and the bracket on the side surface when they are spread left and right and up and down can be changed within a certain range.

[0015] In the present invention, the coupling pin may be configured to protrude a certain length from the side of the diagnostic section so that the diagnostic section can move forward and backward relative to the bracket and the elevator by the protruding length, and at this time, a stopper for limiting the forward and backward movement range of the diagnostic section may be provided at the outer end of the coupling pin.

[0016] In the present invention, the diagnostic unit has a front side and a rear side as side portions, a coupling pin protrudes outward from each of these side portions, a wire passes through a sensor in the diagnostic unit in the space between these side portions, and the bracket also has a front side plate and a rear side plate each having a slit, and the diagnostic unit can be positioned between these side plates.

[0017] In the present invention, connecting rods that connect and fix the front and rear side plates to each other are installed on the left and right sides of the front and rear side plates between the front and rear side plates of the bracket, so that a wire passing through the diagnostic section passes through the space between these two connecting rods and the space between the front and rear side plates, thereby limiting the range in the left-right direction and front-back direction where the wire is located.

[0018] At this time, the front side plate of the bracket is fixed to the front plate of the elevator, the rear side plate of the bracket is fixed to the rear plate of the elevator, and one or more rollers or sheaves can be rotatably installed between the front and rear plates of the elevator to change the direction of movement of the wire.

[0019] In the present invention, two or more coupling pins are formed in parallel on the same side so that they pass through the arc-shaped slit of the bracket side plate at the same time and move along the arc-shaped slit so that the mutual position and angle between the bracket and the diagnostic box change.

[0020] According to the present invention, the mutual coupling form between the wire diagnostic device and the elevator to which the device is coupled can be changed from a fixed form to a variable form, thereby reducing the possibility of damage to the wire and the wire diagnostic device and errors in wire status diagnosis.

[0021] Figure 1 is a front view schematically showing a conventional wire diagnostic device coupled to a platform and the mutual coupling state of wires wound around a sheave or roller installed in the platform through the diagnostic device.

[0022] Figure 2 is a perspective view showing a wire diagnostic device according to one embodiment of the present invention coupled to a portion of a platform, and a wire entering the platform through the diagnostic device.

[0023] Figures 3 to 5 are a plan view, a front view, and a side view, respectively, showing the wire diagnostic device of Figure 2 together with a portion of the elevator and wires.

[0024] Figures 6 and 7 are front views showing the state of connection between each part of the wire diagnostic device according to one embodiment of the present invention and the mutual positional relationship between the wire and a part of the elevator when the elevator rotates clockwise and counterclockwise, respectively.

[0025] FIGS. 8 and 9 are side views showing the coupling state and positional relationship between each part of a wire diagnostic device according to one embodiment of the present invention when the elevator moves forward and backward with respect to the wire, and the mutual positional relationship between the wire and a part of the elevator.

[0026] The present invention will be described in more detail with reference to the drawings below.

[0027] FIG. 2 is a perspective view showing a wire diagnostic device according to one embodiment of the present invention coupled to a portion of a platform, and a wire entering the platform through the diagnostic device, and FIGS. 3 to 5 are a plan view, a front view, and a left side view of the wire diagnostic device of FIG. 2, respectively, showing a portion of the platform and the wire.

[0028] In this embodiment, the wire diagnostic device comprises a diagnostic box (120) having a sensor for inspecting the state of a wire (200) passing through it in an up-and-down direction, and a bracket (130) that is fixedly connected to a platform (110) on one hand and is fixed so as to be able to move in mutual positions with the diagnostic box (120) on the other hand.

[0029] The diagnostic box (120) is configured with two parallel side portions, i.e., a front side portion (120a) and a rear side portion (120b), which are on a plane that extends in the up-down and left-right directions, and a coupling pin (121) that protrudes outward in the front-back direction from each of the side portions of the diagnostic box. Here, two parallel coupling pins (121) protrude outward from each side portion.

[0030] The bracket (130) is formed by two bracket side plates, i.e., a front side plate (130a) and a rear side plate (130b), which are parallel to each other on a plane that is extended in the up-down and left-right directions, and each of these side plates is provided with a slit (131) through which a coupling pin (121) passes and through which the coupling pin (121) can move left-right within a certain range.

[0031] This slit (131) is not a horizontal straight line when viewed from the front, but forms an arc-shaped curve with a certain gap, and the two coupling pins (121) protruding outward (in the forward direction) from the front side (120a) of the diagnostic box pass through the arc-shaped slit (131) provided in the front side plate (130a) of the bracket, and the two coupling pins protruding outward (in the rear direction) from the rear side (120b) of the diagnostic box pass through the arc-shaped slit provided in the rear side plate (130b) of the bracket.

[0032] The coupling pins (121) can only move along the arc slits (131) through which these coupling pins pass, and when the coupling pins move to the left or right along the arc slits, the mutual angle between the diagnostic box (120) and the bracket (130) on the side changes within a certain range.

[0033] Here, the arc slit usually means a circular slit with a certain curvature, but if the coupling pins passing through the slit can move left and right within the slit, and the mutual angle between the diagnostic box and the bracket on the side can change while moving, it does not need to be a strictly circular slit.

[0034] Here, the range of mutual positional change and angular change between the diagnostic box (120) and the bracket (130) can be determined by detailed factors such as the curvature, length, and slit spacing of the circular slit. For example, if the radius of curvature of the circular slit is large (the curvature is small) and the slit length is short, the range of mutual angular change will be limited to a small range.

[0035] Therefore, when the position and angle of the hoisting platform (110) change significantly in the operation of a hoisting device such as a crane, it is appropriate to increase the curvature of the arc-shaped slit and make the slit length long to accommodate such angle changes. However, if the curvature of the arc-shaped slit is formed too large, the coupling pin (121) moving along the slit (131) may not move smoothly, so it is preferable to determine the curvature and slit length within the range in which the coupling pin moves smoothly.

[0036] In this configuration, a wire (200) passes between the two side parts (120a, 120b) of the diagnostic box through a sensor (not shown) for measuring the wire status within the diagnostic box (120), and the diagnostic box (120) is positioned between the front side plate (130a) and the rear side plate (130b) of the bracket (130).

[0037] Since the coupling pin (121) protrudes a considerable length from the side of the diagnostic box (120), the diagnostic box (120) can move in the front-back direction between the front side plate (130a) and the rear side plate (130b) of the bracket with respect to the bracket (130) and the platform (110) by the length of the protrusion. Here, a bolt head, nut, bushing, etc. may be provided on the outer end of the coupling pin (121) to function as a stopper to limit the range of movement in the front-back direction of the diagnostic box (120). However, if the length of the coupling pin (121) is sufficiently long, even if the diagnostic box (120) moves in the front-back direction, the side of the diagnostic box (120) will come into contact with the side plate of the bracket (130) before the coupling pin (121) comes out of the slit (131), preventing movement, so there is no need to worry about the coupling pin (121) coming out of the slit (131).

[0038] Although this example assumes two coupling pins passing through a single slit, it is possible to form a structure with a different number of coupling pins, as long as the coupling pins can pass through a single slit together and move smoothly within the slit. However, if the number of coupling pins passing through a single slit increases and the coupling pin installation interval increases, the distance that the coupling pins can move along the slit decreases, and the allowable angular range between the diagnostic box and the bracket may be reduced.

[0039] Here, for stable and balanced mutual angular conversion operation between the bracket and the diagnostic box, it is assumed that the front side and rear side of the diagnostic box are respectively connected to the front side plate and the rear side plate of the bracket through the connection between their connecting pins and slits, and the front side plate of the bracket is connected to the front plate of the elevator platform, and the rear side plate of the bracket is connected to the rear plate of the elevator platform. However, it is also conceivable that the diagnostic box has connecting pins only in the front side, and the bracket has only a front bracket, or only the front bracket has an arc-shaped slit through which the connecting pin passes. In other words, it is not necessary for the connecting pins and the arc-shaped slits to be connected on all of the front and rear sides.

[0040] The coupling pin (121) protruding forward from the front side portion (120a) and the coupling pin protruding rearward from the rear side portion (120b) may be formed integrally to be a single long coupling pin passing through the diagnostic box (120). In this case, the through hole formed in the diagnostic box so that the coupling pin passes through the diagnostic box (120) may have a considerable amount of play, and it may also be considered that the coupling pin (121) is formed in an arc shape rather than a straight line. In this case, the diagnostic box may also rotate at a certain angle around an axis extending left and right through the diagnostic box. However, in the case where the coupling pin is formed integrally passing through the diagnostic box, it will be considered to adjust and determine the gap so that interference with the wire does not occur within the diagnostic box.

[0041] In the present invention, connecting rods (133, 135) connecting the front side plate (130a) and the rear side plate (130b) of the bracket are installed on the left and right sides of the front side plate (130a) and the rear side plate (130b), so that the wire (200) passing through the diagnostic box (120) passes through the space between the two connecting rods (133, 135) and the space between the front side plate (130a) and the rear side plate (130b), thereby limiting the range in the left-right direction and front-back direction where the wire is located.

[0042] The front side plate (130a) of the bracket is fixed to the front plate (110a) of the platform (110), the rear side plate (130b) of the bracket (130) is fixed to the rear plate (110b) of the platform, and one or more rollers or sheaves can be rotatably installed between the front and rear plates of the platform to change the direction of movement of the wire (200).

[0043] In the embodiment of the present invention having the above configuration, when rotational displacement or movement in the left-right direction occurs in the elevator (110) depending on the environment surrounding the winch and the driving condition, a change in mutual angle occurs between the diagnostic box (120) and the bracket (130) in the wire diagnostic device of this embodiment, and this change in angle can be explained using example forms such as those in FIGS. 6 and 7.

[0044] Figure 6 illustrates a case where the elevator (110) changes its position by rotating counterclockwise around the roller axis of one of the rollers inside, for example, due to a sudden winding of the wire (200). In this case, the wire (200) above the diagnostic box (120) tries to maintain a vertical state or vertical direction in an inertial and continuous manner due to gravity.

[0045] In the past, the diagnostic box and bracket constituting the wire diagnostic device were fixed to each other, and the bracket was fixed to the elevator, so that the diagnostic box was largely rotated with respect to the wire above it at the top of the diagnostic box where the wire entered and exited the diagnostic box. However, in FIG. 6, the diagnostic box (120) is connected in a state close to a straight line with the wire (200) above it, and instead, the bracket (130) and the elevator (110) are rotated relatively to the diagnostic box (120) to have a rotational variation, and a pair of coupling pins (121) protruding from the front side portion (120a) of the diagnostic box are relatively moved to the left from the center of the arc-shaped slit (131) formed in the front side plate (130a) of the bracket, mainly as a result of the movement of the bracket (130), compared to the normal state of FIG. 4.

[0046] When this state is achieved, the wire at the bottom of the diagnostic box (120) has a large degree of freedom in terms of play or direction in relation to the roller or sheave inside the elevator (110), so there is no need to form a state in which it is greatly bent relative to the diagnostic box (120), and as a result, the wire (200) can maintain almost the same direction as the diagnostic box (120) compared to the conventional case, and its position within the diagnostic box does not change significantly, and the occurrence of stress or strain at a specific position of the diagnostic box is also reduced.

[0047] Figure 7 illustrates a case where the elevator changes its position, rotating clockwise around the roller axis of one of its internal rollers, for example, due to a sudden release of the wire. Even in this case, the wire above the diagnostic box inertially and continuously attempts to maintain a vertical state or vertical direction due to gravity.

[0048] As described above with respect to FIG. 6, in the past, the diagnostic box is largely rotated with respect to the wire above it at the top of the diagnostic box where the wire enters and exits the diagnostic box, but in FIG. 7, the diagnostic box is connected in a state close to a straight line with the wire above it, and instead, the bracket and the elevator rotate with respect to the diagnostic box to have a rotational variation, and a pair of coupling pins protruding from the front side of the diagnostic box move relatively to the right from the center of the arc-shaped slit formed in the front side plate of the bracket, mainly as a result of the movement of the bracket, compared to the normal state of FIG. 4, and as a result, the wire can maintain almost the same direction as the diagnostic box compared to the conventional case, and its position within the diagnostic box does not change significantly, and the occurrence of stress or strain at a specific position of the diagnostic box is also reduced.

[0049] FIGS. 8 and 9 are side views showing the coupling state and positional relationship between each part of the wire diagnostic device according to one embodiment of the present invention when the elevator (110) moves forward and backward with respect to the wire (200), and the mutual positional relationship between the wire and a part of the elevator.

[0050] If the elevator (110) is suddenly moved backwards due to a shock from an external object or an object loaded on the elevator (110), the wire (200) above the diagnostic box (120) tries to maintain the vertical state and current position by gravity in an inertial and continuous manner.

[0051] In the past, there was not much space between the front bracket (130a) and the rear bracket (130b), and the diagnostic box (120) and the wire (200) passing through the diagnostic box moved together with the bracket (130) and the elevator (110) to which the bracket was fixed, so that the diagnostic box at the top of the diagnostic box entering and exiting the diagnostic box was temporarily rotated significantly with respect to the wire above it, and accordingly, the wire passing through the inside of the diagnostic box was not in a constant position with respect to the sensor installed inside the diagnostic box and shook, and in this process, errors in the wire inspection results, stress between the diagnostic box and the wire, and damage to the wire or the diagnostic box due to stress concentration may occur.

[0052] However, as shown in FIG. 8, in the embodiment of the present invention, the diagnostic box (120) has a certain amount of space to move between the front side plate and the rear side plate of the bracket (130), so that even when a temporary external force is applied backwards to the elevator (110), the diagnostic box (120) and the wire (200) above it maintain their current positions by inertia, and only the elevator (110) moves backwards relatively. Of course, the combined state of the bracket and the diagnostic box is maintained by the slit of the bracket and the joint pin of the diagnostic box.

[0053] As a result, compared to the normal state of FIG. 5, the diagnostic box (120) and the wire (200) are mainly moved forward from the central position as a result of the bracket (130) and the elevator (110), and the diagnostic box (120) is positioned closer to the front side plate of the bracket (130), and the wire (200) can maintain almost the same vertical direction as the diagnostic box (120), and its position within the diagnostic box does not change significantly, and does not have a great influence on the wire condition diagnosis, and the occurrence of stress or strain at a specific position of the diagnostic box is also reduced.

[0054] With respect to Fig. 9, by the same logic as above, even when a temporary external force is applied forward to the elevator, the diagnostic box and wire are mainly moved rearward from the central position as compared to the normal state of Fig. 5, as a result of the bracket and elevator moving, and the diagnostic box is positioned closer to the rear side plate of the bracket, and the wire can maintain almost the same direction as the diagnostic box, and its position within the diagnostic box does not change significantly, and it does not have a great influence on the wire condition diagnosis, and the occurrence of stress or strain at a specific position of the diagnostic box is also reduced.

[0055] While the present invention has been described above through limited examples, these are merely illustrative examples to aid understanding of the present invention and are not intended to be limited to these specific examples. Therefore, those skilled in the art will be able to devise various modifications and applications based on the present invention, and such modifications and applications are, of course, within the scope of the appended claims.

Claims

1. A diagnostic unit having a sensor for inspecting the state of the wire passing through it in the vertical direction, On one hand, it has a bracket that is fixedly connected to the elevator and on the other hand, it is fixed so that the position of the diagnostic unit and the bracket can be mutually changed. The above diagnostic part has a coupling pin protruding outward in the front-back direction on the side, A wire diagnostic device characterized in that the bracket has a slit through which the coupling pin penetrates the bracket side plate and the coupling pin can move in the left-right direction within a certain range, and the slit is formed in an arc shape so that the mutual angle between the diagnostic unit and the bracket on the side surface when they are spread out in the left-right and up-down directions can be changed within a certain range.

2. In paragraph 1, The above-mentioned coupling pin is configured to protrude a certain length from the side of the diagnostic section so that the diagnostic section moves forward and backward relative to the bracket by the protruding length. A wire diagnostic device characterized in that a stopper for limiting the forward and backward movement range of the diagnostic unit is provided at the outer end of the coupling pin.

3. In paragraph 1, The above diagnostic unit has a front side and a rear side as sides, and the coupling pin protrudes outward from each of the front side and the rear side, and a wire passes through a sensor in the diagnostic unit between the front side and the rear side. The above bracket also has a front side plate and a rear side plate each having a slit, A wire diagnostic device characterized in that the diagnostic unit is located between the front side plate and the rear side plate.

4. In paragraph 3, Between the front side plate and the rear side plate, a connecting rod connecting the front side plate and the rear side plate is installed on the left and right sides of the front side plate and the rear side plate, A wire diagnostic device characterized in that the space between the connecting rods and the space between the front side plate and the rear side plate allows the wire passing through the diagnostic section to pass therethrough, thereby limiting the range in the left-right direction and front-back direction where the wire is located.

5. In paragraph 1 or paragraph 3, A wire diagnostic device characterized in that the above-mentioned coupling pins are formed in two or more positions in parallel on the same side and pass through the arc-shaped slit of the bracket side plate at the same time, and when moving along the slit, the mutual position and angle between the bracket and the diagnostic box change.

Images