JP2017122000A - Coil lifter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coil lifter that can shorten operation time while maintaining a storage capacity of a storage space when handling a coil with a coil lifter.SOLUTION: A coil lifter 1 comprises a base portion 2, a pair of arm portions 5, provided in the base portion 2, which is positioned on both end surfaces 4 of a coil 3 to approach and separate from each other, and claw enter/exit mechanisms 7, provided opposing to lower end parts of the arm portions 5, which are inserted into a center hole 6 of the coil 3 to engage with the hole. The claw enter/exit mechanisms 7 comprise: turning levers 21, provided in the arm portions 5 to be turnable vertically, which point upward or downward when engaging therewith and when disengaging therefrom; engagement claw portions 22 which are pinned to turning ends of the turning levers 21 and inserted into the center hole 6 of the coil 3; and pedestals 23 for sliding claws, provided in the arm portions 5, which when the turning levers 21 turn from non-engagement positions to engagement positions, changes directions of the engagement claw portions 22 to horizontal postures and supports the engagement claw portions 22.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a coil lifter for transporting a rolled coil or the like with a crane or the like, and more particularly to a coil lifter having a claw entry / exit mechanism inserted into a central hole of a coil.

  The coil lifter is used when lifting a rolled coil or the like, and is suspended by a crane. As shown in FIG. 9 (a), some coil lifters 60 are formed by providing an engaging claw portion 62 that can be tilted up and down on an arm 61 that is disposed so as to be close to and away from.

  There are two methods for handling the coil 3 by raising and lowering the engaging claw 62. In the first method, as shown in FIG. 9A, the arm 61 is separated from the coil 3 in advance so that the engaging claw 62 does not interfere with the coil 3 when the engaging claw 62 is tilted. At the same time, when the engaging claw 62 falls down, the engaging claw 62 is positioned at the upper end of the center hole 6 of the coil 3, and the arm 61 is closed and lifted. In the second method, as shown in FIG. 9B, the arm 61 and the engaging claw 62 are arranged so that the engaging claw 62 is raised and lowered in a state where the distance between the arm 61 and the end face 4 of the coil 3 is narrow. The engaging claw 62 is tilted in the center hole 6 of the coil 3 and the coil lifter is lifted and lifted.

JP 2000-169074 A

  However, in the first method, as shown in FIG. 9A, it is necessary to increase the arm opening width and perform the nail entry / exit operation independently. For this reason, the coil interval is increased, and the number of coils that can be stored in a storage area having a predetermined capacity is reduced, and the arm closing time after the nail entry / exit operation is increased.

  In the second method, as shown in FIG. 9 (b), when the coil is lifted by the second method, it is necessary to secure a clearance to allow the coil lifter to be greatly lowered and to move the claws in and out to match the inner diameter of the coil. In addition, there is a problem that the lifter winding time after the nail entry / exit operation becomes long. Furthermore, this method has a problem that it cannot be used unless the central hole of the coil is large enough to ensure the clearance.

  An object of the present invention is to provide a coil lifter that can shorten the operation time while maintaining the storage capacity when handling the coil with the coil lifter.

  In order to achieve the above-described object, the present invention includes a base portion supported by a crane, a pair of arm portions positioned on both end surfaces in the axial direction of a coil provided on the base portion and suspended, A coil lifter provided opposite to a lower end portion of the arm portion and provided with a claw entry / exit mechanism for being inserted into the center hole of the coil and engaging with the coil, wherein the claw entry / exit mechanism is arranged vertically on the arm portion. A pivot lever provided so as to be pivotable and having a pivot end facing upward or downward when disengaged and engaged, and a pin coupled to the pivot end of the pivot lever, and the center of the coil An engaging claw portion to be inserted into the hole, and provided on the arm portion, the posture of the engaging claw portion is horizontally changed when the rotation lever rotates from the non-engagement position to the engagement position. And a claw slide base for supporting the engaging claw portion It is those with a.

  According to the coil lifter of the present invention, the operation time can be shortened while maintaining the storage capacity.

It is a front view of the coil lifter which concerns on one embodiment of this invention. (A) is an AA arrow directional cross-sectional view of FIG. 1, (b) is a BB arrow directional view of (a). It is the perspective view which looked at CC line arrow cross section of Fig.2 (a) from diagonally upward. It is a principal part enlarged view of Fig.2 (a). It is explanatory drawing explaining operation | movement of an engagement nail | claw part in CC sectional view taken on the line of FIG. 2 (a), (a) shows the state which has a rotation lever in a non-engagement position, (b) A state in which the rotation lever is rotating is shown, and (c) shows a state in which the rotation lever is in the engagement position. It is explanatory drawing explaining operation | movement of an engagement nail | claw part, (a) shows the state in which the coil has not got on the engagement claw part, (b) shows the state in which the coil got on the engagement claw part. . It is sectional explanatory drawing of the operation | movement which inserts an engagement nail | claw part in the center hole of a coil. It is explanatory drawing of the coil lifter which concerns on other embodiment, (a) shows the state which has a rotation lever in a non-engagement position, (b) shows the state in which the rotation lever is rotating, c) shows a state in which the rotating lever is in the engaged position. In relation to a conventional coil lifter, (a) shows a state where the coil is lifted by the first method, and (b) shows a state where the coil is lifted by the second method.

  Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

  As shown in FIG. 1, the coil lifter 1 includes a pair of base parts 2 supported by a crane (not shown) and axially opposite end faces 4 of a coil 3 provided and suspended on the base part 2 and closely spaced from each other. The arm part 5, a claw entry / exit mechanism 7 that is provided opposite to the lower end parts of the arm part 5, is inserted into the center hole 6 of the coil 3 and engages with the coil 3, and the claw entry / exit mechanism 7 includes the coil 3 And a locking mechanism 8 that locks the operation of the claw entry / exit mechanism 7 when inserted into the center hole 6.

  The base unit 2 includes an upper block 9 that is suspended from a crane and a lower block 10 that is pivotably provided on the upper block 9. The lower block 10 is formed long in the approaching / separating direction of the arm portion 5. The lower block 10 slidably supports the pair of arm portions 5. The lower block 10 is provided with an arm driving device 11 that drives the arm unit 5. The arm drive device 11 drives the extending portions 14 of the arm portion 5 described later in a direction to approach or separate from each other. The arm driving device 11 is electrically connected to the control device 12 and is configured to be driven by a command from the control device 12.

  The arm portion 5 includes a slide portion 13 that extends in the longitudinal direction of the lower block 10 and is slidably supported by the lower block 10, and a downward extension portion 14 that extends downward from the tip of the slide portion 13. Prepare. As shown in FIG. 2A, the extending portion 14 is provided between a pair of vertical frames 15 formed to be divided into two forks from the tip of the slide portion 13 and the lower ends of the vertical frames 15. A horizontal frame 16.

  As shown in FIG. 2B, one vertical frame 15 is provided with a coil detection device 17 that detects the coil 3. The coil detection device 17 includes a contact bar 19 that is provided on the vertical frame 15 via a link 18 and contacts the coil 3, and a limit switch 20 that detects the rotation of the link 18. The contact bar 19 is disposed so as to protrude in the direction of the coil 3 from the vertical frame 15. The link 18 is formed to rotate when the contact bar 19 contacts the coil 3 and to allow the contact bar 19 to retreat. The limit switch 20 is electrically connected to the control device 12 and outputs a signal to the control device 12 as to whether or not the rotation of the link 18 has been detected.

  As shown in FIGS. 2A, 3, and 5, the claw entry / exit mechanism 7 is provided with a rotation lever 21 provided on the lower extension portion 14 so as to be rotatable up and down, and a rotation end of the rotation lever 21. An engaging claw portion 22 that is rotatably coupled to the pin 3 and inserted into the center hole 6 of the coil 3, and is provided on the horizontal frame 16 of the lower extension portion 14 to support the engaging claw portion 22 from below and a rotation lever 21. And a claw slide base 23 for sliding the engagement claw portion 22 according to the rotation of the claw.

  The rotation lever 21 is provided coaxially and rotatably on a pair of vertical frames 15 that constitute the downward extending portion 14. When the engaging claw portion 22 is not engaged with the coil 3, the rotating lever 21 has its rotating end facing upward, and when the engaging claw portion 22 is engaged with the coil 3, the rotating lever 21 is approximately outward on the arm portion 5. The rotation end is set so that the rotation end faces downward.

  As shown in FIGS. 2A and 2B, one vertical frame 15 is provided with a lever driving device 24 that drives the rotating lever 21. The lever driving device 24 includes an actuator 25 driven by a command from the control device 12, a first sprocket 26 driven to rotate by the actuator 25, and a second sprocket 28 provided integrally with the shaft 27 of the rotating lever 21. And an endless chain 29 wound around the first sprocket 26 and the second sprocket 28. Actuator 25 consists of an electric motor. The actuator 25 is not limited to an electric motor, and may be a hydraulic motor or the like.

  The vertical frame 15 is provided with a lever position detection device 30 that detects the position of the rotation lever 21. The lever position detection device 30 includes a sensor target 31 provided on the shaft 27 of the rotation lever 21 and a proximity sensor 32 provided on the vertical frame 15 to detect the sensor target 31. The sensor target 31 is formed in a disk shape and a shape in which a part of the circumferential direction is enlarged. The proximity sensor 32 is arranged so as to detect the enlarged diameter portion of the sensor target 31 when the rotation lever 21 reaches the vertical stop position. The proximity sensor 32 is electrically connected to the control device 12 and outputs to the control device 12 information indicating whether or not the diameter-expanded portion of the sensor target 31 has been detected.

  As shown in FIG. 2A and FIG. 3, the engaging claw portion 22 is hooked on the side plate portion 33 that is pivotally coupled to each of a pair of opposed rotating levers 21 and the side plate portion 33. A bottom plate portion 34 provided across, a top plate portion 35 provided across a side plate portion 33 opposite to the bottom plate portion 34, and an inner peripheral surface of the coil 3 provided on the top plate portion 35. And a contact pad 36 to be contacted.

  The side plate portion 33 is formed in a long plate shape extending from the pin coupling position. Further, the side plate portion 33 is formed to have a length that extends downward from the rotation lever 21 when the rotation end of the rotation lever 21 faces upward, the tip abuts against the claw slide base 23, and is slightly inclined. Has been. Specifically, the side plate portion 33 is formed to be about twice as long as the rotation lever 21. The sliding contact portion 37 of the side plate portion 33 that is in sliding contact with the claw slide base 23 is formed to be bent in the shape of a ship bottom so that the posture can be easily changed.

  The bottom plate portion 34 is arranged with a position shifted from the sliding contact portion 37 so that the side plate portion 33 is not in contact with the claw slide base 23 when the side plate portion 33 is slid on the claw slide base 23 and the posture is changed. Yes.

  The contact pad 36 is made of a composite material, resin, or metal using a resin such as FRP so as not to damage the coil 3.

  As shown in FIG. 5 (b), the claw slide base 23 is formed in a block shape, and its upper surface is in sliding contact with the engaging claw portion 22. The upper surface of the claw slide base 23 is inclined such that the front side (coil 3 side) is lower than the rear side, and the engagement claw portion 22 is smoothly slid. The claw slide pedestal 23 is positioned in front of the rotation center of the engagement claw portion 22 when the rotation end of the rotation lever 21 is stopped downward. Support the side from below.

  Further, as shown in FIG. 7, the rotation lever 21 and the claw slide base 23 are provided with hole detection sensors 38 and 39 for detecting the center hole 6 of the coil 3. The upper hole detection sensor 38 provided in the rotating lever 21 determines whether or not the upper end of the engaging claw portion 22 does not contact the coil 3 when the engaging claw portion 22 is converted into a horizontal posture. The center hole 6 is detected as much as possible, and is arranged at the height of the upper end of the engaging claw portion 22 in a horizontal posture. The lower hole detection sensor 39 provided on the claw slide pedestal 23 uses the control device 12 to determine whether or not the lower end of the engagement claw portion 22 contacts the coil 3 when the engagement claw portion 22 is converted into a horizontal posture. The center hole 6 is detected so as to be determined, and is disposed at the height of the lower end of the engaging claw portion 22 in a horizontal posture.

  As shown in FIGS. 4 and 6, the lock mechanism 8 includes a main lock mechanism 40 that locks the rotation of the rotation lever 21 when the rotation end of the rotation lever 21 is stopped downward. There is a sub-block mechanism 41 that locks the retraction of the engaging claw portion 22 when the coil 3 rides on the joint claw portion 22.

  The main lock mechanism 40 is provided with a recess 42 formed in a pin 21 a for pin-engaging the engaging claw portion 22 with the rotating lever 21, and is inserted into the recess 42 so as to be able to protrude and retract toward the recess 42. Thus, the lock pin 43 that restricts the rotation of the rotation lever 21, the spring 44 that is provided on the vertical frame 15 and biases the lock pin 43 toward the recess 42, and the lock pin 43 that is provided on the vertical frame 15 is driven. And a lock driving unit 45. The lock driving unit 45 includes a solenoid 46 and a link mechanism 47 that transmits the driving force of the solenoid 46 to the lock pin 43. The solenoid 46 is configured to be driven by a command from the control device 12. The solenoid 46 may be another actuator such as a hydraulic cylinder.

  The sub-lock mechanism 41 is provided on the side plate portion 33 of the engagement claw portion 22 and the claw slide base 23 so as to be fitted to each other and the bottom plate portion 34 of the engagement claw portion 22 so as to protrude downward. When the coil 3 is not on the engaging claw portion 22, it interferes with the claw slide pedestal 23 to lift the engaging claw portion 22 from the claw slide pedestal 23, and the coil 3 is put on the engaging claw portion 22. A spring plunger 50 that is sometimes retracted.

  Next, the operation of this embodiment will be described.

  When the coil 3 is lifted by the coil lifter 1, the coil lifter 1 is moved vertically above the coil 3 by a crane and lowered. At this time, the pair of arm portions 5 need only be spaced so that the contact bar 19 of the coil detection device 17 does not contact the coil 3, as in the conventional coil lifter 60 shown in FIG. In addition, a sufficient space around the end face of the coil 3 is not required.

  Thereafter, when the upper and lower hole detection sensors 38 and 39 detect the center hole 6, the control device 12 stops the lowering of the coil lifter 1 and operates the lever driving device 24. Thereby, the rotation lever 21 rotates backward (opposite side of the coil 3). The engaging claw portion 22 pin-coupled to the rotation end of the rotation lever 21 is pushed forward by the rotation lever 21 and is converted into a horizontal posture while sliding forward on the claw slide base 23. . At this time, the side plate portion 33 of the engaging claw portion 22 that is in sliding contact with the claw slide pedestal 23 is formed in a ship bottom shape, and the position where the side plate portion 33 abuts on the claw slide pedestal 23 corresponds to the pin 21a as the posture changes. Since the engaging claw portion 22 moves to the side, the distal end side approaches a horizontal posture while rotating upward about the contact position with the claw slide base 23. That is, the tip of the engaging claw portion 22 is inserted into the center hole 6 of the coil 3 while gradually rising from the state in contact with the claw slide base 23, and the lower end of the inner peripheral surface of the center hole 6 and There is no contact with the upper end.

  When the proximity sensor 32 of the lever position detection device 30 detects the enlarged portion of the sensor target 31, the control device 12 stops the lever drive device 24 and causes the solenoid 46 of the lock drive portion 45 of the main lock mechanism 40 to contract. The driving force from the solenoid 46 is transmitted to the lock pin 43 through the link mechanism 47, and the lock pin 43 is removed from the recess 42. Similarly, when the control device 12 releases the solenoid 46, the lock pin 43 is pushed by the spring 44. The rotation of the rotation lever 21 is locked by being inserted into the recess 42 of the pin 21a.

  At the same time, the control device 12 drives the arm driving device 11 to bring the arm portion 5 closer to the coil 3. When the contact bar 19 of the coil detection device 17 contacts the end surface of the coil 3 and the limit switch 20 detects the rotation of the link 18, the control device 12 stops the arm unit 5. Since the arm portion 5 is sufficiently closer to the coil 3 than the conventional coil lifter 62 shown in FIG. 9A, the arm portion 5 is stopped in a very short time. Thereafter, the coil lifter 1 is lifted by a crane so that the coil 3 is put on the engaging claw portion 22. At this time, the coil lifter 1 is slowly raised so as not to damage the coil 3. However, since the engaging claw portion 22 is sufficiently close to the upper end of the inner peripheral surface of the coil, the engaging claw portion 22 is extremely short. Coil 3 gets on top.

  Further, as shown in FIG. 6B, when the coil 3 is placed on the engaging claw portion 22, the engaging claw portion 22 rotates downward about the pin 21a against the elastic force of the spring plunger 50. The step portions 48, 4 of the sub-block mechanism 41 are fitted together. Thereby, the movement to the back (direction which separates from the coil 3) of the engaging claw part 22 is locked.

  In this way, the claw entry / exit mechanism 7 is provided on the arm portion 5 so as to be pivotable up and down, and the pivot lever 21 is adapted to face downward when engaged so that the rotational end faces upward when not engaged. The engagement claw portion 22 is pin-coupled to the rotation end of the rotation lever 21 and is inserted into the center hole 6 of the coil 3 and the arm portion 5, and the rotation lever 21 is engaged from the non-engagement position. When rotating to the position, the orientation of the engaging claw portion 22 is horizontally changed, and the claw slide pedestal 23 that supports the engaging claw portion 22 is provided. Therefore, the end surface of the coil 3 and the arm portion 5 are provided. The engagement claw portion 22 can be moved in and out of the coil 3 with the clearance between the engagement claw 22 and the engagement claw portion 22 being moved in and out of the coil 3 side. Minimal clearance between the joint claw 22 and the upper end of the center hole 6 Can, operating time required for lifting the coil 3 can be greatly reduced by the coil lifter 1. Further, since the engaging claw portion 22 can be moved in and out substantially horizontally, the coil 3 having a small inner diameter can be handled with a margin, the risk of the engaging claw portion 22 colliding with the coil 3 can be reduced, and work quality can be improved. Can be expected.

  The engaging claw portion 22 is formed to be longer than the length of the rotating lever 21, and when the rotating lever 21 is in the non-engaging position, the engaging claw portion 22 is held so that the tip is directed downward and is in contact with the claw slide base 23 to rotate. When the moving lever 21 is rotated to the engagement position, it is slid by the claw slide base 23 and horizontally changed in posture, so that the engagement claw portion 22 can be stably moved in and out in the horizontal direction with a simple structure. Can be made.

  Further, since the lock mechanism 8 that locks the operation of the claw entry / exit mechanism when the claw entry / exit mechanism 7 is inserted into the center hole 6 of the coil 3 is provided, even when the engaging claw portion 22 receives an unexpected external force, the coil 3 can be prevented from coming off, the coil 3 can be prevented from being damaged, and the coil 3 can be moved reliably.

  In addition, although what demonstrated the drive of the nail | claw-in / out mechanism 7 and the main lock mechanism 40 by the control apparatus 12 was demonstrated, it does not restrict to this. The claw entry / exit mechanism 7 and the main lock mechanism 40 may be performed by manual operation such as button operation, or may be a combination of automatic control and manual operation.

  In addition, the rotation lever 21 is configured such that the rotation end faces upward when disengaged and faces downward when engaged, but the rotation end faces downward when disengaged and faces upward when engaged. It may be. In this case, for example, as shown in FIGS. 8A, 8 </ b> B, and 8 </ b> C, the claw slide pedestal 51 has a contact point with the engagement claw portion 52 in front of the rotation center of the rotation lever 21 (coil It is good to be provided in the downward extension part 14 so that it may be located in the upper side. The extending portion 14 is provided with a guide portion 53 that regulates the rotation direction of the engaging claw portion 52 so that the raised engaging claw portion 52 does not rotate backward (opposite to the coil 3). It should be done.

  As shown in FIGS. 8 (a) and 8 (b), when the turning lever 21 directed downward is turned rearward (on the opposite side to the coil 3), the engaging claw portion 52 has a front end side for claw sliding. While riding on the pedestal 51, the rear end side is pushed upward by the rotation lever 21. As shown in FIGS. 8B and 8C, the engaging claw portion 52 is changed in posture to a horizontal posture while being pushed forward by further turning the turning lever 21, and It protrudes forward.

DESCRIPTION OF SYMBOLS 1 Coil lifter 2 Base part 3 Coil 4 End surface 5 Arm part 6 Center hole 7 Claw entry / exit mechanism 21 Rotating lever 22 Engaging claw part 23 Claw slide base

Claims (4)

A base portion supported by a crane, a pair of arm portions located on both end surfaces in the axial direction of the coil provided on the base portion and suspended, and provided opposite to the lower end portions of these arm portions; In a coil lifter provided with a claw entry / exit mechanism for engaging with the coil inserted into the central hole of the coil,
The claw entry / exit mechanism is provided on the arm portion so as to be rotatable up and down, and has a turning lever whose turning end faces upward or downward when not engaged and engaged, and a rotation of the turning lever. An engagement claw portion that is pin-coupled to the moving end and is inserted into the central hole of the coil, and provided in the arm portion, the engagement lever is rotated when the rotation lever rotates from the non-engagement position to the engagement position. A coil lifter comprising: a claw slide pedestal for horizontally changing a direction of the joint claw portion and supporting the engagement claw portion.   The coil lifter according to claim 1, wherein the rotation lever is rotated outward with respect to the arm portion by a driving device.   The engaging claw portion is formed longer than the length of the rotating lever, and when the rotating lever is in the non-engaging position, the tip is held downward and is in contact with the claw slide base, 3. The coil lifter according to claim 2, wherein when the rotation lever is rotated to the engagement position, the coil lifter is slid on the claw slide base and horizontally changed in posture.   The coil lifter according to any one of claims 1 to 3, further comprising a lock mechanism that locks the operation of the claw entry / exit mechanism when the claw entry / exit mechanism is inserted into a central hole of the coil.

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