JP2010215336A - Rope pressing device of winch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rope pressing device of a winch that prevents a rope wound around the body of a drum from slipping out of the gap between a flange of the drum and the end portion of a pressing roller, while not causing the end surface of the pressing roller and inner surface of the flange to wear. <P>SOLUTION: In the rope pressing device 1 of the winch 102, the pressing roller 4 includes: a separating portion 30a which includes a portion locating between a first sub roller 26 and a second sub roller 28, and separating both the sub rollers 26, 28 each other along the axis 24, and the length of which along the axis 24 is variable; and a fixing portion 30b fixing the position so as not to allow the second sub roller 28, separated from the first sub roller 26 by the separating portion 30a, to move toward the flange 104a at one side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a winch rope retainer.

  The crane is provided with a hoisting winch and a hoisting winch, and a rope for lifting and a rope for hoisting the boom are wound around the drum of the winch. This type of rope is usually wound in multiple layers in a state where it is aligned in the axial direction of the drum without any gaps. However, if the rope is loose, the rope is lifted to the drum. There is a case where it is not wound up in an aligned state and becomes a so-called turbulent winding state. Also, due to both the axial dimension error of the drum and the rope thickness error, there is a deviation between the drum winding groove interval and the actual rope winding interval, causing the rope to slip on the drum. The winding cannot be performed well, and the turbulent winding can occur in this case as well.

  Therefore, Patent Document 1 below discloses that a rope pressing device is provided on the winch in order to suppress such a random winding of the rope. This rope pressing device includes a pressing roller, a support portion, and an urging spring. The support portion supports the pressing roller so that it does not move in the axial direction at the tip portion divided into two, and can rotate about the shaft provided at the base end portion. It has become. The supporting portion is urged by the urging spring so that the pressing roller rotates about the shaft in a direction approaching the drum portion of the winch. The pressing roller is disposed between a pair of flanges of the drum of the winch so as to prevent the rope from being lifted by being pressed against a rope wound around the drum body by the biasing force of the biasing spring. It has become. Thereby, the random winding of the rope is suppressed.

  In the rope pressing device of Patent Document 1, even when a gap may be generated between the flange of the drum and the end of the pressing roller due to a dimensional error of the drum and a dimensional error of the pressing roller, the gap The structure that can prevent the rope from coming out of the cable is further taken. Specifically, in this rope pressing device, the pressing roller is disposed at the center in the axial direction and is supported by the supporting portion and a pair of shaft rollers disposed on both outer sides in the axial direction of the axial roller. Each movable roller is urged by a spring member from the end of the shaft roller toward the flange of the drum. As a result, each movable roller is brought into close contact with the corresponding flange of the drum so that no gap is formed between them, and as a result, the rope is prevented from coming out of the gap.

JP 2003-73079 A

  However, in the rope pressing device disclosed in Patent Document 1, since the movable roller is always pressed against the flange of the drum by the spring member, the end surface of the movable roller and the inner surface of the flange of the drum against which the end surface is pressed are formed. There is a risk of wear.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a rope wound around the drum portion of the drum without wearing the end surface of the pressing roller and the inner surface of the flange of the drum. It is intended to provide a winch rope pressing device capable of preventing escape from a gap between the flange and the end portion of the pressing roller.

  In order to achieve the above object, a winch rope pressing device for pressing a rope wound around a trunk located between a pair of flanges of a winch drum mounted on a crane. A pressing roller disposed between the pair of flanges and contacting the rope wound around the trunk portion from the outside in the radial direction of the trunk portion to prevent the rope from being lifted; A support portion that is rotatably supported around the shaft, and the pressing roller is rotatably supported by the support portion and extends from the support portion toward one of the flanges, and more than the support portion. A first roller portion attached around the shaft portion at one flange side position, and the shaft portion at a position closer to the one flange side than the first roller portion; A second roller portion attached to the shaft portion so as to be movable along the shaft portion, and the roller portions interposed between the first roller portion and the second roller portion. A separation portion having a portion separated from each other along the shaft portion, the separation portion having a variable dimension in the direction along the shaft portion, and the second roller portion separated from the first roller portion by the separation portion And a fixing portion for fixing the position so as not to move to the one flange side.

  In the first aspect of the present invention, the distance between the second roller portion and the first roller portion can be adjusted along the shaft portion by using the separation portion, and the separation can be performed. With the distance adjusted, the second roller portion can be fixed by the fixing portion so as not to move to the one flange side. Accordingly, the gap between the second roller portion and the flange is set in the drum while maintaining the state where the second roller portion does not contact the one flange according to the axial dimension of the drum portion of the winch drum. It is possible to adjust the size so that the rope wound around the trunk does not come out. As a result, the rope wound around the drum body does not wear from the end surface of the second roller portion of the pressure roller and the inner surface of the drum flange, and the gap between the drum flange and the pressure roller end portion is removed. It can be prevented from coming out.

  According to a second aspect of the present invention, in the rope retainer for a winch according to the first aspect, the spacing portion is formed on the shaft portion so as to be sandwiched between the first roller portion and the second roller portion. It consists of a plurality of detachable spacers.

  According to the second aspect of the present invention, the number of the plurality of spacers sandwiched between the two roller portions is adjusted, or each spacer has a different thickness, and an appropriate thickness is selected from the spacers. A distance between the second roller portion and the flange can be adjusted by selecting a spacer and sandwiching it between both roller portions to adjust the distance that the second roller portion is separated from the first roller portion toward the one flange side. Can be adjusted. In the second aspect of the invention, since the gap between the first roller portion and the second roller portion is filled by the spacer, there is a problem that the rope cannot be pressed in such a gap. Can be prevented. That is, according to the second aspect of the present invention, the spacer can both adjust the gap between the second roller portion and the flange and prevent the rope from entering the gap between the two roller portions. Become.

  According to a third aspect of the present invention, in the winch rope pressing device according to the second aspect, the spacer has a cutout portion having a shape into which the shaft portion can enter in a radial direction thereof, and the cutout portion. The shaft portion is inserted between the first roller portion and the second roller portion.

  According to the third aspect of the present invention, the spacer is attached to and detached from the shaft portion in the radial direction between the first roller portion and the second roller portion without removing the second roller portion attached to the shaft portion. be able to. Thereby, the attaching / detaching operation of the spacer can be simplified.

  According to a fourth aspect of the present invention, there is provided the rope pressing device for a winch according to the first aspect, wherein one of the first roller portion and the second roller portion has a portion around an attachment portion with respect to the shaft portion. A through-hole penetrating the one roller portion in the axial direction is provided, and the separation portion is fixed to the other roller portion of the first roller portion and the second roller portion and along the shaft portion. The adjustment male screw portion inserted into the through hole, the one roller portion and the other roller portion to be screwed into the adjustment male screw portion and in contact with the one roller portion. An adjusting female thread portion for setting an interval between the one roller portion and the other roller portion is included.

  According to the fourth aspect of the present invention, the position of the adjusting female threaded portion screwed into the adjusting male threaded portion can be adjusted steplessly along the adjusting male threaded portion. The interval between the two roller portions set by the step can be adjusted steplessly, whereby the position of the second roller portion along the shaft portion can be adjusted more precisely. As a result, in this configuration, even when there is a very small error in the axial dimension of the drum body, the second roller portion can be made in close contact with the flange of the drum even when there is a very small error. The gap between the second roller portion and the flange can be adjusted to a size that prevents the rope from coming out.

  According to a fifth aspect of the present invention, in the winch rope pressing device according to the fourth aspect, in any one of the first roller portion and the second roller portion, a diameter of a gap between the two roller portions is provided. The cover part which covers a direction outer side is provided, It is characterized by the above-mentioned.

  According to the fifth aspect of the present invention, there is a case where a gap is formed between the two roller portions due to the two male roller portions being separated from each other by the adjusting male screw portion and the adjusting female screw portion. In addition, the outer side in the radial direction of the gap can be covered by the cover portion, and it is possible to prevent the rope from entering the gap and the press of the rope from becoming ineffective.

  A sixth aspect of the present invention is the winch rope pressing device according to any one of the first to fifth aspects, wherein the fixing portion includes a fixing male screw portion provided on the shaft portion and a shaft portion thereof. The second roller portion is screwed into the fixing male screw portion of the shaft portion at a position closer to the one flange side than the mounting position of the second roller portion to the second roller portion, and the second roller portion moves to the one flange side. A fixing female threaded portion that regulates the inner surface of the second roller portion, and a concave portion is formed on an end surface of the second roller portion facing the one flange, and the fixing female screw portion is accommodated in the concave portion. It is what.

  According to the sixth aspect of the present invention, the position of the second roller portion along the shaft portion is fixed by restricting the movement of the second roller portion toward the one flange by the fixing female screw portion. In addition, the fixing female screw portion can be accommodated in a recess provided in the end surface of the second roller portion, and the fixing female screw portion can be prevented from hitting the one flange. That is, according to the invention described in claim 6, even when the position of the second roller portion is fixed by the fixing female screw portion at the position on the one flange side with respect to the mounting position of the second roller portion with respect to the shaft portion, It is possible to prevent the inner surface of the flange of the drum from being worn by the contact of the fixing female screw portion.

  As described above, according to the rope pressing device of the winch of the present invention, the rope wound around the drum body does not wear the end surface of the pressing roller and the inner surface of the flange of the drum. It is possible to prevent escape from the gap between the end portions of the rollers.

It is a top view of the winch to which the rope pressing device according to the first embodiment of the present invention is applied. It is a side view of the winch and rope press apparatus shown in FIG. It is sectional drawing of the rope pressing device along the III-III line in FIG. It is sectional drawing orthogonal to the axial direction of the pressing roller of the rope pressing apparatus by 1st Embodiment. It is a figure which expands and shows the part of the pressing roller vicinity among sectional drawings of the rope pressing apparatus shown in FIG. It is a top view of the spacer used for the pressing roller of the rope pressing device by a 1st embodiment. It is a figure which shows partially the part of the edge part vicinity of the axial direction of the pressing roller among the sectional views along the axial direction of the pressing roller of the rope pressing device by 2nd Embodiment of this invention. It is the top view which showed the modification of the spacer.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
First, with reference to FIGS. 1-6, the rope holding | suppressing apparatus 1 of the winch 102 by 1st Embodiment of this invention is demonstrated.

  The rope pressing device 1 according to the first embodiment is attached to each winch 102 (a hoisting winch or a raising / lowering winch) mounted on a crane, and a trunk located between a pair of flanges 104a of the drum 104 of the winch 102. It is for pressing down the rope 50 wound around the portion 104b. The rope pressing device 1 suppresses the rope 50 from being lifted from the body portion 104 b of the drum 104 by pressing the rope 50, thereby suppressing the wrapping of the rope 50.

  Specifically, as shown in FIG. 1, the winch 102 is installed on a crane (not shown) via a gantry 103 and includes a drum 104 and a drive motor 106 that rotationally drives the drum 104. I have.

  The drum 104 has a pair of flanges 104a that are spaced apart in the axial direction, and a body portion 104b that is disposed between the pair of flanges 104a. When the drum 104 is rotated around its axis by the drive motor 106, a rope 50 (see FIG. 2) used for lifting work or raising and lowering the boom is wound around the outer periphery of the body portion 104 b of the drum 104. The rope 50 is usually wound in a multilayered manner in a state where it is aligned in the axial direction of the trunk portion 104b without any gap. A large number of groove portions 104c are formed on the outer peripheral surface of the body portion 104b side by side in the axial direction of the body portion 104b. The first-layer rope 50 wound around the trunk portion 104b is wound without gaps from one end side to the other end side in the axial direction of the trunk portion 104b along each groove portion 104c. When wound to the end, the second layer is wound on the first layer from the other end side of the body portion 104b toward the one end side. As described above, the rope 50 is normally wound in a state of being arranged in a multilayered manner without gaps while reciprocating in the axial direction with respect to the trunk portion 104b.

  However, when the rope 50 is loosened due to some factor, the rope 50 floats to the outside in the radial direction of the trunk portion 104b and a jump occurs, or the rope 50 overlaps with the rope 50 in the adjacent row. There is a risk that 50 random windings will occur. The rope pressing device 1 according to the first embodiment is used for suppressing the floating of the rope 50 from the trunk portion 104b of the rope 50 and suppressing the random winding of the rope 50.

  As shown in FIGS. 3 and 4, the rope pressing device 1 includes a support mechanism 2 and a pressing roller 4.

  The support mechanism 2 is configured to support the pressing roller 4 so as to be rotatable about its axis and to bias the pressing roller 4 in a direction approaching the body portion 104b. The support mechanism 2 includes a support part attaching part 6, a support part 8, an urging part holding part 10, and an urging part 12.

  The support portion mounting portion 6 is provided on a base 105 fixed to the gantry 103 and supports a base end portion of a support arm 8 a described later of the support portion 8. The base 105 extends substantially parallel to the axial center of the drum 104 at a position adjacent to the rear of the drum 104, and the support portion mounting portion 6 is separated in the longitudinal direction of the base 105, that is, in the axial direction of the drum 104. A pair is provided. Each support portion mounting portion 6 includes an arm support shaft 6 a disposed substantially parallel to the axis of the drum 104. The arm support shafts 6a of the support portion mounting portions 6 are arranged coaxially, and the base end portions of the support arms 8a described later of the support portion 8 are supported by the arm support shafts 6a.

  The support part 8 supports the pressing roller 4 rotatably, and has a pair of support arms 8a, a pair of bearings 8b, and a connecting member 8c.

  The pair of support arms 8a are disposed so as to be spaced apart from each other in the axial direction of the pressing roller 4, and rotatably support the pressing roller 4. At the base end portion of each support arm 8a, a fitting portion 8d that is fitted onto the corresponding arm support shaft 6a is provided. The fitting portion 8d is externally fitted to the arm support shaft 6a so as to be rotatable about the axis. As a result, the support arm 8a can swing around its base end side, so that the distal end of the support arm 8a contacts and separates from the body 104b of the drum 104 by the swing. It has become.

  The bearings 8b are respectively provided on the outer surfaces of the tip portions of the pair of support arms 8a. Each support arm 8a supports a shaft portion 24, which will be described later, of the pressing roller 4 via the bearing 8b so as to be rotatable about its axis.

  As shown in FIG. 3, the connecting member 8c is installed between a pair of support arms 8a, and the pair of support arms 8a are connected and integrated. The connecting member 8c connects portions of the support arms 8a adjacent to the distal end side of the support arm 8a from the fitting portion 8d.

  The urging unit holding unit 10 is for holding the urging unit 12, and is located on the base 105 at a position spaced apart from each of the support unit mounting units 6 between the pair of support unit mounting units 6. It is attached. The urging portion holding portion 10 includes an urging portion mounting shaft 10a disposed coaxially with the arm support shaft 6a, an attachment shaft support portion 10b that is fixed to the base 105 and supports the urging portion mounting shaft 10a. have.

  The urging portion 12 urges the support portion 8 so that the tip ends of the both support arms 8a approach the trunk portion 104b. As a result, the pressing roller 4 supported by the tip portions of the two supporting arms 8a is urged in a direction approaching the trunk portion 104b, and the rope 50 wound around the trunk portion 104b is pressed by the pressing roller 4. As shown in FIG. 4, the urging portion 12 is formed of a torsion coil spring, and is wound around the urging portion mounting shaft 10a. One end of the torsion coil spring of the urging portion 12 is in contact with a part of the mounting shaft support portion 10b of the urging portion holding portion 10, while the other end is in contact with the connecting member 8c. The elastic force is applied to the connecting member 8c, and the support portion 8 is biased as described above.

  The pressing roller 4 is disposed between the pair of flanges 104a of the drum 104, and comes into contact with the rope 50 wound around the trunk portion 104b from the outside in the radial direction of the trunk portion 104b to suppress the lifting of the rope 50.

  As shown in FIG. 5, the pressing roller 4 includes a main roller 22, a pair of shaft portions 24, a pair of first sub rollers 26, a pair of second sub rollers 28, and a position adjusting unit 30.

  The main roller 22 is a relatively long roller that is disposed in the central portion of the pressing roller 4 in the axial direction. Shaft portions 24 are respectively provided at the positions of the shaft centers of both ends of the main roller 22 so as to protrude outward. Each shaft portion 24 extends in the axial direction of the pressing roller 4 and is rotatably supported by the tip end portion of the corresponding support arm 8a, and is located on the outside, that is, adjacent to the flange 104a (see FIG. 3 reference) side. Each shaft portion 24 is inserted and fixed to an inner ring member 8e of a bearing 8b provided at the tip of the corresponding support arm 8a, and the outer ring member 8f of the bearing 8b is fixed to the tip of the support arm 8a. It is fixed to the outside surface. With this structure, the shaft portion 24 is rotatable about its axis with respect to the distal end portion of the support arm 8a. The shaft portion 24 is rotatably supported by the support arm 8a, so that the main roller 22 is rotatable around the shaft.

  The pair of first sub-rollers 26 are arranged separately on both outer sides in the axial direction of the main roller 22 and can rotate integrally with the main roller 22. The first sub-roller 26 is included in the concept of the first roller portion of the present invention. Each first sub-roller 26 is formed with an insertion hole 26a coaxially with the axis thereof, and a shaft portion 24 extending outward from the distal end portion of the support arm 8a is inserted into the insertion hole 26a. That is, the first sub-roller 26 is attached around the shaft portion 24 at a position closer to the flange 104a than the bearing 8b of the support portion 8.

  Each first sub-roller 26 has an outer diameter equal to that of the main roller 22, and the end surface of the first sub-roller 26 on the bearing 8b side is in contact with the end of the inner ring member 8e of the bearing 8b. Each first sub-roller 26 is provided with a first sub-roller cover portion 26b extending from the end on the bearing 8b side to the main roller 22 side so as to surround the radially outer side of the bearing 8b. The first sub-roller cover portion 26b has an outer diameter equal to that of the first sub-roller 26 and the main roller 22, and faces the end surface of the first sub-roller 26 on the bearing 8b side by the first sub-roller cover portion 26b. The outer side in the radial direction of the gap between the outer surface of the distal end portion of the support arm 8a is covered. As a result, the bearing 8b is provided so as to protrude outward from the distal end portion of the support arm 8a, so that a gap is formed between the distal end portion of the support arm 8a and the end surface of the first sub-roller 26 facing the support arm 8a. Even if formed, the rope 50 is prevented from entering the gap.

  Each second sub-roller 28 is disposed outside the corresponding first sub-roller 26. The second sub-roller 28 is included in the concept of the second roller portion of the present invention. Each second sub-roller 28 is formed with an insertion hole 28a coaxially with the axis thereof, and the shaft portion 24 corresponding to the insertion hole 28a is inserted therein. That is, each second sub-roller 28 is attached around the shaft portion 24 at a position closer to the flange 104 a than the first sub-roller 26. The second sub-roller 28 is externally fitted to the shaft portion 24 so as to be movable along the shaft portion 24. The portion of the second sub-roller 28 from the end on the first sub-roller 26 side to the central portion in the axial direction has the same outer diameter as that of the first sub-roller 26, and the adjacent flange 104a side from the central portion. The outer surface is formed in a tapered shape so that the diameter of the portion up to the end is gradually reduced toward the end. A concave portion 28b is formed on the end surface of each second sub-roller 28 that faces the adjacent flange 104a.

  The position adjusting unit 30 is provided for one of the first sub-roller 26 and the second sub-roller 28 and the other of the first sub-roller 26 and the second sub-roller 28, and the second sub-roller 28 extends from the first sub-roller 26. It is used to adjust the distance of separation along the shaft portion 24 toward the adjacent flange 104a and to fix the position of the second sub-roller 28 in a state where the separation distance is adjusted. The position adjustment unit 30 includes a separation unit 30a and a fixing unit 30b.

  The spacing portion 30 a is interposed between the first sub-roller 26 and the second sub-roller 28 and separates both the sub-rollers 26, 28 from each other along the shaft portion 24, and is sandwiched between the sub-rollers 26, 28. The dimension of the portion along the shaft portion 24 is variable.

  Specifically, the spacing portion 30a includes a plurality of spacers 30c that can be attached to and detached from the shaft portion 24 so as to be sandwiched between the first sub-roller 26 and the second sub-roller 28. As shown in FIG. 6, each spacer 30c is a disk-like member having an insertion hole 30d formed coaxially with its axis, and the shaft portion 24 is inserted into the insertion hole 30d. The spacer 30c has an outer diameter equal to the outer diameter of the first sub-roller 26 and the outer diameter of the end of the second sub-roller 28 on the first sub-roller 26 side. Therefore, the outer peripheral surfaces of the end portions of the first sub-roller 26, the spacer 30c, and the second sub-roller 28 on the first sub-roller 26 side are surfaces in a state where the spacer 30c is mounted on the shaft portion 24 between both the sub-rollers 26 and 28. Become one.

  Then, the number of the plurality of spacers 30c sandwiched between the sub-rollers 26, 28 is adjusted, or each spacer 30c is made to have a different thickness, and a spacer 30c having an appropriate thickness is selected from the spacers 30c. The distance between the sub rollers 26 and 28 can be adjusted by selecting and inserting the sub rollers 26 and 28 between them. By adjusting the distance between the sub rollers 26 and 28, the distance at which the second sub roller 28 is separated from the first sub roller 26 toward the adjacent flange 104a can be adjusted.

  The fixing portion 30b is for fixing the position of the second sub roller 28 separated from the first sub roller 26 by the separation portion 30a so as not to move to the adjacent flange 104a side. The fixing portion 30b has a fixing male screw portion 30e and a fixing female screw portion 30f.

  The fixing male screw portion 30e is provided at the tip portion of each shaft portion 24, and protrudes into the concave portion 28b of the corresponding second sub-roller 28. The fixing female screw portions 30f (nuts) are screwed into the fixing male screw portions 30e, and the fixing female screw portions 30f are accommodated in the recesses 28b of the corresponding second sub-rollers 28. . That is, the fixing female screw portion 30f is screwed into the fixing male screw portion 30e at a position closer to the flange 104a than the mounting position of the second sub-roller 28 with respect to the shaft portion 24. When the fixing female screw portion 30f is tightened, the second sub-roller 28, the first sub-roller 26, and the spacer 30c sandwiched between the two sub-rollers 26 and 28 are replaced with the inner ring member 8e of the bearing 8b and the fixing female screw. The second sub-roller 28 is fixed to the part 30f and integrated with the shaft part 24, and the second sub-roller 28 is pressed against the separating part 30a toward the first sub-roller 26, and the position is fixed. The movement of the two sub-rollers 28 toward the adjacent flange 104a is restricted.

  Next, when there is a dimensional error of the drum 104, a dimensional error of the pressing roller 4, etc., in the rope pressing device 1 according to the first embodiment, the gap between the end of the pressing roller 4 and the flange 104a of the drum 104 is determined. A method for adjusting the gap will be described.

  First, the fixing female screw portion 30f screwed into the fixing male screw portion 30e is loosened to remove the fixing female screw portion 30f from the fixing male screw portion 30e, and then the second sub-roller 28 is removed from the shaft portion 24. Remove.

  Next, an appropriate number of spacers 30c or spacers 30c having an appropriate thickness are externally fitted to the shaft portion 24, and then the shaft portion 24 with the second sub roller 28 sandwiched between the first sub roller 26 and the spacer 30c. Reattach to. At this time, the number of spacers 30c is adjusted or an appropriate thickness so that a gap is formed between the outer end face of the second sub-roller 28 and the opposite flange 104a so that the rope 50 does not come out. The position along the shaft portion 24 of the second sub-roller 28 is adjusted by using the spacer 30c.

  Finally, the fixing female screw portion 30f is screwed into the fixing male screw portion 30e and tightened to fix the position along the shaft portion 24 of the second sub-roller 28, and the first sub-roller 26, the second sub-roller 28, and those A spacer 30 c sandwiched between the sub rollers 26 and 28 is fixed to the shaft portion 24.

  As described above, in the first embodiment, the distance by which the second sub roller 28 is separated from the corresponding first sub roller 26 along the shaft portion 24 toward the adjacent flange 104a using the spacer 30c of the separation portion 30a. In addition to being able to adjust, the position of the second sub-roller 28 can be fixed by the fixing portion 30b so as not to move to the flange 104a side with the separation distance adjusted. Accordingly, the second sub roller 28 is not in contact with the adjacent flange 104a in accordance with the axial dimension of the drum portion 104b of the drum 104 of the winch 102, and between the second sub roller 28 and the flange 104a. The gap can be adjusted to such a size that the rope 50 wound around the trunk portion 104b does not come out. As a result, the rope 50 wound around the drum portion 104b of the drum 104 does not wear the end surface of the second sub-roller 28 of the pressing roller 4 and the inner surface of the flange 104a of the drum 104, and the flange 104a of the drum 104 and the pressing roller 4 Can be prevented from slipping out of the gap between the ends of the.

  Further, in the first embodiment, a separation portion 30 a that separates the first sub roller 26 and the second sub roller 28 from each other can be attached to and detached from the shaft portion 24 so as to be sandwiched between the first sub roller 26 and the second sub roller 28. Therefore, the number of spacers 30c sandwiched between the sub-rollers 26 and 28 among the plurality of spacers 30c is adjusted, or the spacers 30c are made to have different thicknesses. By selecting a spacer 30c having an appropriate thickness from among the two sub-rollers 26 and 28, the distance at which the second sub-roller 28 is separated from the first sub-roller 26 toward the adjacent flange 104a can be adjusted. 2 The gap between the sub roller 28 and the adjacent flange 104a can be adjusted. . And in this 1st Embodiment, since the clearance gap between the 1st sub-roller 26 and the 2nd sub-roller 28 is filled with the spacer 30c, it prevents that the trouble that the holding | suppressing of the rope 50 becomes ineffective in such a clearance gap arises. be able to. That is, according to the first embodiment, both the adjustment of the gap between the second sub-roller 28 and the adjacent flange 104a and the prevention of the rope 50 from entering the gap between the sub-rollers 26, 28 by the spacer 30c. Can be performed.

  In the first embodiment, the fixing female screw portion 30f that is screwed into the fixing male screw portion 30e of the shaft portion 24 and restricts the second sub roller 28 from moving toward the adjacent flange 104a is the second sub roller. 28 is accommodated in a recess 28b formed on the end surface facing the flange 104a, it is possible to avoid the fixing female screw portion 30f from hitting the flange 104a. That is, in the first embodiment, even when the position of the second sub roller 28 is fixed by the fixing female screw portion 30f at a position closer to the flange 104a than the mounting position of the second sub roller 28 with respect to the shaft portion 24, the fixing female screw It is possible to prevent the inner surface of the flange 104a of the drum 104 from being worn by the contact with the portion 30f.

(Second Embodiment)
Next, the rope presser 1 of the winch 102 according to the second embodiment of the present invention will be described with reference to FIG.

  The rope pressing device 1 of the winch 102 according to the second embodiment is different from the first embodiment in that the distance between the first sub-roller 26 and the second sub-roller 28 by the adjusting male screw portion 30g and the adjusting female screw portion 30h. Is set.

  Specifically, in the second embodiment, the separating portion 30a includes an adjusting male screw portion 30g, an adjusting female screw portion 30h, a first fixing nut 30i, and a second fixing nut 30j.

  A plurality of through holes 26d penetrating in the axial direction are provided around the attachment portion of the first sub roller 26 to the shaft portion 24, that is, around the insertion hole 26a of the first sub roller 26, and the shaft of the second sub roller 28 is provided. A plurality of through-holes 28 d penetrating in the axial direction are provided around the attachment portion to the portion 24, that is, around the insertion hole 28 a of the second sub-roller 28. An adjusting male screw portion 30g made of a bolt is inserted into the through holes 26d, 28d of both the sub rollers 26, 28 from the main roller 22 side. The adjusting male screw portion 30g extends along the shaft portion 24, and the head (bolt head) of the adjusting male screw portion 30g is on the main roller 22 side of the first sub-roller 26 and the first sub-roller cover. It arrange | positions in the space where the radial direction outer side was covered by the part 26b. A first fixing nut 30i is screwed into the adjusting male screw portion 30g at a position corresponding to the second sub roller 28 of the first sub roller 26, and the head of the first fixing nut 30i and the adjusting male screw portion 30g. The adjustment male screw portion 30g is fixed to the first sub roller 26 by sandwiching the first sub roller 26 therebetween.

  An adjusting female screw portion 30h made of a nut is screwed between the sub rollers 26 and 28 in the adjusting male screw portion 30g and at a position closer to the tip than the screwing position of the first fixing nut 30i. The adjusting female thread portion 30h is in contact with the end surface of the second sub roller 28 on the first sub roller 26 side so that the interval between the sub rollers 26 and 28 is set. Then, the fixing female screw portion 30f of the fixing portion 30b fixes the position of the second sub roller 28 in a state where the second sub roller 28 is pressed against the adjusting female screw portion 30h toward the first sub roller 26 side. It has become. The leading end portion of the adjusting male screw portion 30g is disposed in the concave portion 28b of the second sub-roller 28 through the through hole 28d of the second sub-roller 28, and the second fixing nut 30j is screwed to the leading end portion. ing. Accordingly, the second fixing nut 30j is accommodated in the recess 28b of the second sub-roller 28. The adjustment male screw portion 30g and the second sub roller 28 are fixed to each other by sandwiching the second sub roller 28 between the second fixing nut 30j and the adjustment female screw portion 30h.

  Further, the second sub roller 28 is provided with a second sub roller cover portion 28 f that covers the radially outer side of the gap between the second sub roller 28 and the first sub roller 26. The second sub-roller cover part 28f is included in the concept of the cover part of the present invention. The second sub-roller cover portion 28f is formed in a cylindrical shape extending from the end of the second sub-roller 28 on the first sub-roller 26 side to the main roller 22 side, and radially outside the gap between the sub-rollers 26 and 28. It covers and overlaps the outer peripheral surface of the first sub roller 26. When the position of the second sub-roller 28 is shifted along the shaft portion 24, the second sub-roller cover portion 28 f slides on the outer peripheral surface of the first sub-roller 26. The second sub roller cover portion 28 f has an outer diameter equal to that of the main roller 22.

  The other configuration of the rope pressing device 1 according to the second embodiment is the same as that of the first embodiment.

  Next, in the rope pressing device 1 according to the second embodiment, when adjusting the gap between the end portion of the pressing roller 4 and the flange 104a of the drum 104, first, it is screwed into the fixing male screw portion 30e. The fixing female screw portion 30f that is tightened is loosened, and the second fixing nut 30j that is screwed into the adjusting male screw portion 30g is loosened.

  Next, the adjusting female thread 30h is turned so that a gap is formed between the outer end face of the second sub-roller 28 and the flange 104a facing the second sub-roller 28 so that the rope 50 does not come out. The position along the shaft portion 24, that is, the distance (the distance between the sub rollers 26 and 28) that the second sub roller 28 is separated from the first sub roller 26 along the shaft portion 24 is adjusted. After this adjustment, the second fixing nut 30j is tightened and the fixing female thread portion 30f is tightened to fix the position along the shaft portion 24 of the second sub-roller 28.

  In the second embodiment, the position of the adjusting female screw portion 30h screwed to the adjusting male screw portion 30g can be adjusted steplessly along the adjusting male screw portion 30g. The interval between the set sub-rollers 26 and 28 can be adjusted steplessly, whereby the position of the second sub-roller 28 along the shaft portion 24 can be adjusted precisely. As a result, in the second embodiment, even if there is a very small error in the axial dimension of the drum portion 104b of the drum 104, the second sub-roller 28 is made to correspond to the minute error finely. Without contacting the flange 104a, the gap between the second sub-roller 28 and the flange 104a can be adjusted to a size that prevents the rope 50 from coming out.

  In the second embodiment, the second sub-roller 28 is provided with the second sub-roller cover portion 28f that covers the radially outer side of the gap between the first sub-roller 26. As described above, the adjusting male screw A gap is formed between the sub-rollers 26 and 28 because the sub-rollers 26 and 28 are separated from each other by the portion 30g and the adjusting female screw portion 30h and the distance between the sub-rollers 26 and 28 is set. Even in this case, the radially outer side of the gap can be covered with the second sub roller cover portion 28f. Therefore, it is possible to prevent the rope 50 from entering the gap and the press of the rope 50 from becoming ineffective.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and all modifications within the meaning and scope equivalent to the scope of claims for patent are further included.

  For example, as shown in FIG. 8, the spacer 30c has a notch portion 30k having a shape into which the shaft portion 24 can enter in the radial direction, and both the shaft portions 24 enter the notch portion 30k. The spacer 30c may be sandwiched between the sub rollers 26 and 28.

  According to this configuration, after loosening the fixing female screw portion 30f, the spacer 30c is disposed on the shaft portion 24 between the first sub roller 26 and the second sub roller 28 without removing the second sub roller 28 from the shaft portion 24. It can be attached and detached in the radial direction. Thereby, the attachment / detachment work of the spacer 30c can be simplified.

  Further, in the support mechanism 2, the urging portion 12 that urges the support portion 8 so that the pressing roller 4 supported by the tip end portion of the support arm 8a approaches the body portion 104b of the drum 104 is not necessarily required. The roller 4 may be configured to press the rope 50 wound around the trunk portion 104b by its own weight.

  Further, a pair of support arms 8a may not be provided, and one support arm cantilever-supports the pressing roller 4 as long as it has a desired strength.

  Furthermore, the shaft portion 24, the first sub roller 26, and the second sub roller 28 do not need to be provided in pairs, and may be provided only on one side.

  Moreover, the main roller 22 is not necessarily required among the pressing rollers 4, and only the first sub-roller and the second sub-roller may be provided as the rollers. For example, the tip end portion of the support arm may support the central portion in the axial direction of the pressing roller, and the first sub-roller and the second sub-roller may be provided on both sides of the tip end portion, respectively.

DESCRIPTION OF SYMBOLS 1 Rope pressing device 4 Pressing roller 8 Support part 24 Shaft part 26 1st sub-roller (1st roller part)
28 Second sub-roller (second roller part)
28b Recess 28d Through hole 28f Second sub-roller cover part (cover part)
30a Spacing part 30b Fixing part 30c Spacer 30e Fixing male thread part 30f Fixing female thread part 30g Adjustment male thread part 30h Adjustment female thread part 30k Notch part 50 Rope 102 Winch 104 Drum 104a Flange 104b Body part

Claims (6)

A winch rope pressing device for pressing a rope wound around a trunk located between a pair of flanges of a winch drum mounted on a crane,
A pressing roller disposed between the pair of flanges and configured to contact the rope wound around the trunk from the outside in the radial direction of the trunk to suppress lifting of the rope;
A support portion that rotatably supports the pressing roller around its axis;
The pressing roller is rotatably supported by the support portion and extends from the support portion to one flange side, and around the shaft portion at a position closer to the one flange side than the support portion. A first roller portion to be attached, and a second roller attached to the shaft portion so as to be movable along the shaft portion at a position closer to the one flange than the first roller portion. And a portion that is interposed between the first roller portion and the second roller portion and separates both roller portions from each other along the shaft portion. A separation portion having a variable dimension, and a fixing portion for fixing the position of the second roller portion separated from the first roller portion by the separation portion so as not to move toward the one flange side. To, winch rope hold-down device.   2. The winch according to claim 1, wherein the separation portion includes a plurality of spacers detachably attached to the shaft portion so as to be sandwiched between the first roller portion and the second roller portion. Rope presser.   The spacer has a cutout portion having a shape into which the shaft portion can enter in the radial direction, and the first roller portion and the second roller portion in a state where the shaft portion enters the cutout portion. The rope retainer for a winch according to claim 2, wherein the rope retainer is sandwiched between them. Around the attachment portion of one of the first roller portion and the second roller portion with respect to the shaft portion, a through-hole penetrating the one roller portion in the axial direction is provided,
The spacing portion is fixed to the other roller portion of the first roller portion and the second roller portion, extends along the shaft portion, and is inserted into the through hole, and the one Between the first roller portion and the other roller portion, and is brought into contact with the one roller portion to set an interval between the one roller portion and the other roller portion. The winch rope retainer according to claim 1, further comprising an adjusting female thread portion for performing the adjustment.   The cover part which covers the radial direction outer side of the clearance gap between these both roller parts is provided in either one of the said 1st roller part and the said 2nd roller part, The Claim 4 characterized by the above-mentioned. Winch rope retainer. The fixing portion is connected to the fixing male screw portion of the shaft portion at a position closer to the one flange side than the mounting position of the second roller portion to the shaft portion and the fixing male screw portion provided on the shaft portion. And a fixing female thread portion that restricts movement of the second roller portion toward the one flange side,
The end surface of the second roller portion facing the one flange is formed with a recess, and the fixing female screw portion is accommodated in the recess. The winch rope retainer according to item 1.