JP2005231852A - Winding drum of winch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a winding drum of a winch having a wire rope terminal part handling structure capable of simply attaching a winding terminal part of a wire rope to the winding drum of the winch by a rational fixing means and ensuring safety. <P>SOLUTION: This winding drum 4 of the winch 1 has a wire rope fixing structure which nips and fixes a terminal part 30a of the wire rope wound around the winding drum 4 by a pressing member 12 fitted in a bottom face of a recessed part 11 by providing the recessed part 11 in a part of a surface of the winding drum 4. A surface of the pressing member 12 is formed into a curved face along an outer peripheral face of the winding drum 4. A rope pressing channel 14 for receiving and pressing the wire rope terminal part 30a is formed on a central line of a lower face. The rope is directly locked by set screws 18 arranged in a plurality of sections from an upper face to the rope pressing channel 14. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winch winding drum mainly used in heavy machinery, and more particularly to a structure for fixing a terminal portion of a wire rope wound around the winding drum of the winch, and the wire rope wound around the winding drum comes out. The present invention relates to a winch winding drum that can be surely prevented.

  Conventionally, in a winch that is directly connected to a reduction drive and rotates, as a terminal binding means to a winding rope of a wire rope wound around the winding drum, as known from Patent Documents 1 to 3, the terminal of the wire rope is used. A socket or cylindrical locking piece is attached integrally, and a terminal portion with the locking piece is inserted into the inside through a notch opening provided in the winding drum, and comes into contact with the inner peripheral surface of the winding drum. Means to lock are taken.

Japanese Utility Model Publication No. 40-20590 Japanese Utility Model Publication No. 40-27865 Japanese Utility Model Publication No. 48-28539

  However, in the method disclosed in Patent Document 1, after inserting the large circular diameter portion attached to the rope end from the large diameter portion in the keyhole-shaped rope end insertion hole provided in the winding drum, Since the wire rope is slid and held in the narrow part of the rope end insertion hole, if the winding force of the wire rope on the winding drum is loosened during use, the rope part becomes the narrow part. There is a problem in that the large-diameter portion of the rope end that is fitted and locked is displaced due to the looseness of the wire rope and comes out of the rope end insertion hole.

  Further, in the wire rope terminal binding method described in Patent Document 2, even if the wound wire rope is loosened, it does not come out unless the terminal socket is removed. When replacing, the flange portion on the side of the winding drum must be disassembled, and the entire winch is disassembled, which makes it difficult to replace the wire rope. In what has been proposed by Patent Document 3 as a solution to such a problem, in order to fit the end portion of the wire rope inside the flange portion of the winding drum side portion, the end portion is inserted into a narrow space. There is a problem in mounting operability due to the structure that must be provided.

  As a fixing means instead of the above-described method of inserting the locking piece fixed to the wire rope end portion into the winding drum and fixing it inside the winding drum, for example, FIGS. 5 (a), (b), ( As shown in c), a recess 101 is provided in a part of the surface of the winding drum 100, and the holding plate 102 that fits the terminal portion 106 a of the wire rope 106 into the recess 101 in the recess 101. In some cases, a method is adopted in which the holding plate 102 is clamped to the winding drum 100 by a plurality of bolts 104 and fixed to the winding drum 100 with the bottom surface 103 of the recess 101. And the receiving piece 105 along the axial direction of the winding drum 100 is fixed so that the wire rope 106 wound around the center portion of the surface of the pressing plate 102 does not fall at the terminal portion fixing portion. According to this method, the rope end can be reliably fixed on the surface side of the winding drum 100, and there is an advantage that the workability is better than the method described above and the rope end can be fixed securely.

  However, according to such a system, as shown in FIG. 5, the first-layer wire wound around the winding drum 100 on the upper side of the portion where the terminal portion is fixed to the winding drum 100 using the holding plate 102. The rope 106 does not fall at the terminal portion fixing portion, but is wound around the portion in the winding direction in a straight line between the front and rear edges of the recess 101 and the top surface of the receiving piece 105. When such a phenomenon occurs, a part of the wire rope 106 is floated between the three locations a, b, and c, so that the wire rope wound around the second layer is between the first layer ropes. When it is wound around (the valley part generated at the adjacent part of the wire rope to be wound), the floating part is pushed and spread by the acting force toward the winding drum axis due to the tension of the second layer wire rope, and the rope Something happens in between. Alternatively, the rope is crushed while it is wound in multiple layers, and there is a problem in that the strands of the wire rope are damaged particularly at the points a, b, and c. Such a phenomenon does not occur all at once, but is considered to occur during the use of the winch. Normally, all the first layers of the wire rope 106 wound around the winding drum 100 are not extended, and the terminal is fixed. Near the part is hardly paid out. For this reason, there is a danger of overlooking the occurrence of damage to the wire rope 106 and causing an unexpected accident.

  The present invention has been made to solve such problems, and is a function that can easily attach a winding end portion of a wire rope to a winding cylinder of a winch by a reasonable fixing means and ensure safety. An object of the present invention is to provide a winch winding drum having a wire rope end portion processing structure.

In order to achieve such an object, the winding drum of the winch according to the present invention is:
A wire rope fixing structure in which a recess is provided in a part of the surface of the winding drum, and the end portion of the wire rope wound around the winding drum is sandwiched and fixed by a presser member that fits the bottom surface of the recess. A surface of the presser member is formed into a curved surface along the outer peripheral surface of the winder drum, and a rope presser groove is formed on the center line of the lower surface for receiving and pressing the wire rope terminal portion. The rope is configured to be directly locked to the rope pressing groove by set screws arranged at a plurality of positions from the upper surface.

  In the present invention, it is preferable that a notch guide portion is formed on the rope winding side of the pressing member so that the rope is drawn from the locking portion to the winding drum in the circumferential direction of the winding drum.

  According to the present invention, when the wire rope wound around the winding drum is charged, the end portion of the wire rope is received in the rope pressing groove provided on the lower surface of the pressing member, and is sandwiched between the bottom surface of the recess and the pressing member. After that, if the presser member is fixed by fastening with a bolt, the upper surface of the presser member becomes an outer surface of a curved surface that substantially matches the curved surface of the outer peripheral surface of the winding drum. Can be aligned. And if the terminal part of the wire rope clamped by the bottom face of the recess in the rope pressing groove by the set screw attached to the pressing member is locked, the wire rope terminal part can be securely locked and fixed. . Therefore, the wire rope can be wound tightly around the winding drum end by fixing the terminal portion in the recess, and the first rope can be wound even when the second layer is wound. It will be wound entirely along the peripheral surface and will not cause any abnormalities. As a result, there is no damage to the rope as has conventionally occurred in winches, it can be held stably, and the wire rope to be wound is the same as the winding drum surface without causing floating at the terminal fixing processing location. Thus, it is possible to prevent the occurrence of random winding and other causes of wire rope damage.

  Further, by adopting the configuration of the second invention, when the wire rope fixed by the pressing member is wound around the winding drum, the bent portion of the rope drawn out from the fixing portion and wound around the winding drum can be reasonably wound. Since it can be transferred to the surface, the rope can be wound around the drum without damaging the rope.

  Next, a specific example of a winch winding drum according to the present invention will be described with reference to the drawings.

  FIG. 1 is an overall plan view of an embodiment of a winch having a winding drum according to the present invention. 2 is a plan view of the main part, and FIG. 3 is a sectional view taken along line AA in FIG.

  The winch 1 of this embodiment is similar to the conventional one in basic structure, and is mounted on a winding drum 4 supported on a base 2 by a pair of frames 3 and 3 ′ from a motor 5 attached to one frame 3 to the other. Power is transmitted through a gear reduction mechanism 6 attached to the frame 3 ′, and the winding drum 4 is driven to reduce speed. The motor 5 is provided with a built-in electromagnetic brake so that the brake is activated simultaneously with the stop of driving.

  The winding drum 4 is provided with a wire rope terminal fixing means 10 at a part of its peripheral surface so as to be shifted to one flange portion 7. The wire rope terminal fixing means 10 includes a recess 11 formed in the winding drum 4 and a pressing member 12 that fixes the terminal portion 31 of the wire rope 30 in the recess 11.

  As shown in FIGS. 2 and 3, the recess 11 is a box shape having a square shape in plan view and a required depth, and the inner bottom surface 11 a of the recess 11 is flattened, and a flange portion in the recess 11 is formed. 7 is provided with a rope take-out groove 16 in the circumferential direction in the circumferential direction.

  The pressing member 12 has a surface 13 formed into an arcuate surface that substantially coincides with the circumferential surface of the winding drum 4 and can be inserted into the recess 11 so that the rope can be led from one end to the rope takeout groove 16 on the recess 11 side. A rope pressing groove 14 is provided over the entire length on the center line of the back surface in a square shape with an outer dimension that allows the notch guide portion 13 to be formed. The front surface 13 is provided with a plurality of screw holes 17 perpendicular to each other in the longitudinal direction at the upper position of the rope pressing groove 14 on the back surface, and hexagonal set screws 18 are screwed into the screw holes 17. Has been. Further, a total of four mounting holes 19 are provided on both sides of the screw hole 17 forming portion so as to match the mounting screw holes 20 provided in the recess 11 at a predetermined pitch. The mounting hole 19 is preferably a long hole for convenience of alignment. The mounting hole 19 is formed with a counterbore 19a having a depth in which the head of the bolt 21 sinks when the presser member 12 is fastened in the recess 11. The hexagon socket set screw 18 has a size such that the upper end sinks inside the screw hole 17 when the rope end is locked.

  In the winch winding drum of this embodiment configured as described above, when the wire rope 30 is wound around the winding drum 4, the end portion 30a of the wire rope 30 is provided in the rope holding groove 14 provided on the back surface of the holding member 12. The presser member 12 is inserted into the recess 11 provided in the winding drum 4 and fixed to the recess 11 with the fastening bolt 21. In this way, the end portion 30 a of the wire rope is clamped and fixed by the inner surface of the rope pressing groove 14 of the pressing member 11 and the bottom surface 11 a of the recess 11 of the winding drum 4. Further, when a plurality of set screws 18 attached to the presser member 11 are tightened inward, the end portion 30a of the wire rope whose tip is fixed in the rope presser groove 14 is strengthened. Press firmly to fix.

  In this way, the wire rope 30 having the terminal portion 30 a fixed by the presser member 12 and the set screw 18 in the recess 11 of the winding drum 4 extends along the notch guide portion 13 formed on one side of the presser member 12. Thus, it is guided from the recess 11 to the surface side of the winding drum 4 through a rope take-out groove 16 formed on the winding drum circumferential surface. By doing so, the recess 11 becomes a curved surface that substantially matches the peripheral surface of the winding drum 4 by the presser member 12 fitted inside the upper portion thereof, and the wire rope 30 led to the outside from the rope takeout groove 16. Since the upper part of the recess 11 is aligned with the peripheral surface of the winding drum 4 and buried, the wire rope 30 wound around the portion does not float and there is no problem. Wound smoothly. Therefore, even when the layers are wound in multiple layers, the upper layer of the wire rope 30 does not bite at the lower portion of the wire rope winding portion, and the problem of damaging the rope can be solved.

  When the wire rope 30 is fixed by pressing the terminal portion 30a against the bottom surface 11a of the recess 11 of the winding drum 4 by the pressing member 12, the rope terminal portion 30a is inserted into the rope pressing groove 14 provided in the pressing member 12. Since the rope end portion 30a is turned back and does not become disassembled at the time of fixing, the strands are cut off. Never get out. Moreover, in this embodiment, since it is set as the structure where an irregular external force does not act on a rope by the notch guide part 13 also in the part by which the wire rope 30 is guide | induced to the winding drum surface side from a fixing part, it fixes during use. There is no detachment from the department.

  As described above, according to the present embodiment, the conventional problems can be reasonably solved with a simple configuration, and even when the wire rope is charged (wound) into the winding drum, the rope holding groove of the pressing member 12 is provided. If the rope end is fitted and inserted into the recess as it is and fastened and fixed with the mounting bolt, the rope end can be securely fixed to the winding drum, and the work must be done by removing the presser member when replacing the rope. You can install a new wire rope and work.

1 is an overall plan view of an embodiment of a winch having a winding drum according to the present invention. Enlarged plan view of the main part AA sectional view in FIG. The figure showing the aspect which fixes a rope terminal part and is wound around a winding drum It is explanatory drawing of the fixation aspect of the conventional wire rope terminal part, (a) is a top view of a winch winding drum, (b) is an enlarged plan view of a wire rope terminal fixing part, (c) is a BB cross-sectional view. .

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Winch 4 Winding drum 6 Flange part 10 Wire rope terminal part fixing means 11 Recess 11a Inner bottom face of a recess 12 Holding member 13 The surface of a holding member 14 Rope holding groove 16 Rope taking-out groove 18 Set screw 20 Fastening bolt 30 Wire rope 30a Wire rope terminal

Claims (2)

  A wire rope fixing structure in which a recess is provided in a part of the surface of the winding drum, and the end portion of the wire rope wound around the winding drum is sandwiched and fixed by a holding member that fits the bottom surface of the recess. A surface of the pressing member is formed in a curved surface along the outer peripheral surface of the winding drum, and a rope pressing groove for receiving and pressing the wire rope terminal portion is formed on the center line of the lower surface. A winch winding drum characterized in that the rope is directly locked to the rope pressing groove by set screws arranged at a plurality of positions from the upper surface.   2. The winch winding drum according to claim 1, wherein a guide portion through which the rope is drawn from the locking portion to the winding drum is formed in a circumferential direction of the winding drum on the rope pull-out side of the pressing member.

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