WO2023032661A1

WO2023032661A1 - Winch drum

Info

Publication number: WO2023032661A1
Application number: PCT/JP2022/030991
Authority: WO
Inventors: 秀和岩下; 彰博 ▲吉▼町
Original assignee: コベルコ建機株式会社
Priority date: 2021-09-02
Filing date: 2022-08-16
Publication date: 2023-03-09
Also published as: JP2023036195A; JP7380658B2

Abstract

A guide area (5A) of a winch drum (1) includes a guide recess (62) shaped to be recessed in the axial direction of the winch drum (1) from a rope guide (53) so as to allow insertion of part of the last row of rope during rope winding. The guide recess (62) has: a recess start end that is the portion of the guide recess (62) to which the last row of rope in a specific layer comes adjacent first during rope winding; and a recess terminal end that is the portion of the guide recess (62) to which the last row of rope comes adjacent last. The recess start end is located closer to the guide start end of the rope guide (53) than the top of the rope guide (53), and the recess terminal end is located closer to the guide terminal end of the rope guide (53) than the top of the rope guide (53).

Description

winch drum

The present disclosure relates to a winch drum for winding ropes used in cranes and the like.

Each of Patent Documents 1 to 3 discloses a winch drum used for cranes and the like. This winch drum is a device for winding a rope by rotating around an axis of rotation. The winch drum includes a winding drum and a pair of flanges. The rope is arranged in the winding drum such that a plurality of rope portions constituting a part of the rope are arranged in a plurality of rows in the axial direction, which is the direction of the rotating shaft, and in a plurality of layers in the radial direction of the winch drum. It is the part that The pair of flanges protrude outward in the radial direction from both ends of the winding drum in the axial direction. Each of the pair of flanges has a rope guide projecting from the inner surface of the flange toward the opposite flange. A rope guide is sometimes called a rope kick. The rope guide is arranged in this first row so that the rope portion of the first row in the upper layer, which is one layer above, intersects the rope portion of the last row in the lower layer when the rope is wound on the winch drum. It is for guiding a row of rope sections.

For example, in a crane, when the weight of the load supported by the hook attached to the end of the rope is small, or when there is no load attached to the hook, the rope being let out from the winch drum is affected. When the load is small, the winch drum may experience the following problems. That is, when the load on the rope is small when the rope is wound, the gap between the rope portion in the row immediately before the last row in the lower layer and the flange is ideal in the vicinity of the area where the rope guide is formed. may be smaller than the required dimensions. In other words, the distance in the axial direction between the rope portion of the row one row before the last row and the flange may be smaller than the ideal dimension. In this case, in the vicinity of the area where the rope guide is formed, the rope portion of the last row in the lower layer may not enter the gap. When such an event occurs, the rope portion of the first row in the upper layer is not properly positioned relative to the rope portion of the last row in the lower layer, resulting in a disturbed winding condition of the rope on the winding drum. As a result, the rope cannot be wound up on the winding drum in an orderly manner. Also, when the flexibility of the rope is low, problems similar to those described above are likely to occur.

Japanese Utility Model Laid-Open No. 6-23995 JP 2019-123585 A JP 2015-209283 A

INDUSTRIAL APPLICABILITY The present disclosure is a winch capable of suppressing disturbance of the winding state of a rope on a winding drum during rope winding even when the load on the rope is small or the flexibility of the rope is low during rope winding. The purpose is to provide drums.

Provided is a winch drum rotatable about an axis of rotation in a winding rotation direction, which is the direction of rotation for winding a rope, wherein a plurality of rope sections forming part of said rope are aligned with said axis of rotation. a winding drum for winding the rope so as to line up in a plurality of rows along the axial direction that is the direction and to line up in a plurality of layers along the radial direction of the winch drum; a first flange and a second flange respectively protruding outward from the rope, wherein each of the first flange and the second flange is the last row of the rope in a specific layer that is at least one layer of the plurality of layers a guide region that is a region that includes a rope guide that guides the rope portion of the first row so that the rope portion of the first row in a specific upper layer that is one layer above the specific layer intersects with the part The rope guide of the first flange has a shape protruding from the inner surface of the first flange toward the second flange, and the rope guide of the second flange protrudes from the second flange. The rope guide of each of the first flange and the second flange has a shape that protrudes from the inner surface toward the first flange, and the rope guide is a guide start end located at the boundary with the inner surface and the rope is a guide end located on the boundary between the guide start end, which is the first adjacent part of the rope guide when the rope part of the first row is wound on the winch drum, and the inner surface, and When the rope is wound, the rope portion of the first row is a guide end that is the last adjacent portion of the rope guide, and a top portion of the rope guide located between the guide start end and the guide end. and the guide region is a recess at a portion corresponding to the rope portion of the last row in the specific layer, and the rope of the last row is recessed at the time of winding the rope. It further includes a guide recess having a shape that is recessed in the axial direction from the rope guide so that a part of the portion can enter, and the guide recess is located in the last row of the specific layer when the rope is wound. The recess has a recess start end where the rope portion is the first adjacent portion of the guide recess and a recess end end where the rope portion of the last row is the last adjacent portion of the guide recess. The starting end is positioned closer to the guide starting end of the rope guide than the top of the rope guide and the recess end is located closer to the guide end of the rope guide than to the top of the rope guide.

1 is a side view of a crane with a winch drum in accordance with an embodiment of the present disclosure; FIG. It is a perspective view which shows the winch drum which concerns on the said embodiment. It is a top view which shows the winch drum which concerns on a reference example. 4 is a cross-sectional view taken along line IV-IV of FIG. 3; FIG. FIG. 5 is a cross-sectional view showing the flange when viewed in the direction of the arrow at the position of line AA in FIG. 4; FIG. 4 is a schematic diagram showing an arrangement state of ropes at position P1 in FIG. 3; Fig. 4 is a schematic diagram showing the arrangement of the ropes at position P2 of Fig. 3, showing proper winding; FIG. 4 is a schematic diagram showing an arrangement state of ropes at position P3 in FIG. 3; Fig. 4 is a schematic diagram showing the arrangement of the ropes at position P2 of Fig. 3, showing an improper winding condition; 1 is a plan view of a winch drum according to an embodiment of the present disclosure; FIG. FIG. 4 is a developed view of the winch drum for explaining the arrangement of rope grooves provided on the outer peripheral surface of the winding drum of the winch drum according to the embodiment; FIG. 11 is a cross-sectional view of the winch drum along line XII-XII in FIG. 10; FIG. 11 is a cross-sectional view of the winch drum along line XIII-XIII of FIG. 10; FIG. 5 is a diagram for explaining features of a guide region in the flange of the winch drum according to the embodiment; FIG. 13 is a cross-sectional view of the winch drum along line XV-XV of FIG. 12; FIG. 14 is a cross-sectional view of the winch drum along line XVI-XVI of FIG. 13; FIG. 11 is a schematic diagram showing an arrangement state of ropes at position P1 in FIG. 10; It is a top view which shows the winch drum which concerns on the said embodiment. It is the side view which expanded a part of flange in the winch drum based on the modification of the said embodiment.

Hereinafter, embodiments of the present disclosure will be described in detail based on the drawings.

FIG. 1 is a side view schematically showing a crane 100 including a winch drum 1 according to an embodiment of the present disclosure. As shown in FIG. 1 , the crane 100 includes a self-propellable undercarriage 101 , an upper revolving body 102 arranged on the undercarriage 101 , a hoisting member, and a winch device 107 .

The upper revolving body 102 includes a revolving frame 103 mounted on the lower traveling body 101 so as to be rotatable about the vertical axis, a cabin supported at the front part of the revolving frame 103, and supported at the rear part of the revolving frame 103. and a counterweight. The luffing member includes a boom 104 hoistably mounted to the front of a pivot frame 103 . The luffing member may further include a jib attached to the tip of boom 104 .

The winch device 107 is a device that causes the hook 105 to move up and down for hanging work by winding or unwinding a rope R (wire rope) connected to the hook 105 . The winch device 107 includes a winch drum 1 and a drive source (not shown) such as a hydraulic motor and a speed reducer. An arrangement position of the winch device 107 is, for example, behind the mounting portion of the boom 104 on the revolving frame 103 . A winch device 107 may be attached to the boom 104 . One end of the rope R is fixed to the winch drum 1 .

FIG. 2 is a perspective view showing the winch drum 1 according to the embodiment of the present disclosure. As shown in FIG. 2, the winch drum 1 is rotatable about the rotation axis K in a winding rotation direction D1, which is the rotation direction in which the rope R is wound, and in a delivery rotation direction D2, which is the rotation direction in which the rope R is paid out. Configured. The delivery rotation direction D2 is opposite to the winding rotation direction D1. A winch drum 1 includes a winding drum 2 around which a rope R is wound in a plurality of layers, and a pair of

flanges

3, 3.

The winding drum 2 is, for example, a portion having a cylindrical shape or a columnar shape, and a plurality of layers of rope R are wound around the outer peripheral surface of the winding drum 2 . The pair of

flanges

3, 3 are a first flange 3A and a second flange 3B projecting outward in the radial direction from both ends of the winding drum 2 in the axial direction. The winch drum 1 is driven by the drive source to rotate around the rotation axis K for winding or unwinding the rope R. As shown in FIG. The winch drum 1 is supported by the revolving frame 103 so that the width direction of the upper revolving body 102 and the rotation axis K coincide with each other, for example.

The rope R is pulled out from the winding drum 2, passes through a sheave attached to the tip of the boom 104, extends downward from the tip of the boom 104, and supports the hook 105. A suspended load 106 is attached to the hook 105 . The winch drum 1 rotates around the rotation axis K in the winding rotation direction D1 to wind the rope R around the winding drum 2, thereby raising the hook 105. As shown in FIG. In addition, the winch drum 1 rotates around the rotation axis K in the delivery rotation direction D2 to let out the rope R, thereby lowering the hook 105 .

Below, the winch drum 1 according to the embodiment of the present disclosure will be described in detail, but prior to that, the winch drum according to the reference example and its problems will be described. 3 to 9 are diagrams showing winch drums according to reference examples.

As shown in FIG. 3, the winch drum according to the reference example includes a winding drum 202 on which a rope R is wound in multiple layers, and a pair of flanges 203 projecting radially outward from both ends of the winding drum 202 in the axial direction. (first flange 203A and second flange 203B). In this winch drum, a rope groove 204 is provided on the outer peripheral surface of the winding drum 202 .

In addition, each of the pair of flanges 203 has a rope guide 205, as shown in FIGS. The rope guide 205 (first rope guide 205A) of the first flange 203A has a shape protruding from the inner surface 203S of the first flange 203A toward the second flange 203B, and the rope guide 205 of the second flange 203B ( The second rope guide 205B) has a shape that protrudes from the inner surface 203S of the second flange 203B toward the first flange 203A. 6 is a schematic diagram showing the arrangement of ropes at position P1 in FIG. 3, FIG. 7 is a schematic diagram showing the arrangement of ropes at position P2 in FIG. 3, and FIG. It is a schematic diagram showing the arrangement state of the rope in P3.

L1 shown in FIG. 7 is the dimension (guide-to-guide dimension) between the first rope guide 205A of the first flange 203A and the second rope guide 205B of the second flange 203B. A dimension L1 indicates a guide-to-guide dimension at a portion where the top portion 250 of the first rope guide 205A and the top portion 250 of the second rope guide 205B are present. The first rope guide 205A of the first flange 203A and the second rope guide 205B of the second flange 203B are formed at positions facing each other in the axial direction of the rotation axis K. This guide-to-guide dimension L1 is set to a dimension obtained by multiplying the number of rows of rope portions in each layer by the rope diameter or a value close to this dimension. Therefore, the rope R is in a state in which the upper layer rope portion and the lower layer rope portion are overlapped in the vertical direction as shown in FIG. On the other hand, as shown in FIGS. 6 and 8, the upper layer rope portion is positioned between two adjacent lower layer rope portions in the portions other than the rope guide 205 .

In such a winch drum, first, the rope portions R1 to R5 of the first layer of the rope R enter the rope groove 204 and are wound up in an orderly manner. Then, the rope portion R6 in the first row of the second layer moves from a position closer to the second flange 203B than the rope portion R5 of the first layer as shown in FIG. 6 to the rope guide 205B as shown in FIG. It is guided to move directly above the rope portion R5 and further guided by the rope guide 205B to move directly above the valley formed by the rope portions R4 and R5 of the first layer as shown in FIG. move to In this manner, the rope portions R6 to R10 of the second layer are wound up in an orderly manner. Then, the rope portion R11 in the first row of the third layer is guided by the first rope guide 205A in the same manner as the rope portion R6, and moves from the position shown in FIG. 6 to the position shown in FIG. It moves just above the valley formed by rope portions R9 and R10 of the layer.

In the specification and drawings, each of the rope portions R1 to R12 constitutes a portion of one continuous rope R. Also, in the drawings, as shown in FIG. 6, for example, the number "1" is written inside the circle representing the rope portion R1 located in the first row of the first layer, and the number "1" is located in the second row next to it. The number "2" is written inside the circle representing the rope portion R2. Further, the first layer, for example, as shown in FIG. 6, is composed of a rope portion R1 located in the first row of the first layer to a rope portion R5 located in the last row (fifth row in FIG. 6). be. That is, the first layer is composed of rope portions R1, R2, R3, R4 and R5. The second layer comprises a rope portion R6 positioned in the first row of the second layer to a rope portion R10 positioned in the last row (fifth row in FIG. 6). That is, the second layer is composed of rope portions R6, R7, R8, R9 and R10. Similarly, in the third and higher layers, each layer is composed of a plurality of rope portions from the rope portion positioned in the first row to the rope portion positioned in the last row. The above is the same for other figures described later.

In the crane 100, if the load on the rope R that is let out from the winch drum is small or if the flexibility of the rope R is low, the winch drum may have the following problems. The case where the load on the rope R is small includes, for example, the case where the weight of the load 106 supported by the hook 105 attached to the rope R is small and the case where the hook 105 is not attached to the load 106 .

That is, when the rope R is wound on the winch drum during rope winding, when the load on the rope R is small or when the flexibility of the rope R is low, as shown in FIG. , for example, the gap G1 between the first flange 203A and the rope portion R9 in the fourth row immediately before the final row (fifth row) in the second layer may become smaller than the ideal dimension. be. In other words, the distance G1 in the axial direction between the rope portion R9 in the fourth row one row before the final row and the rope guide 205 of the first flange 203A becomes smaller than the ideal dimension G0 shown in FIG. 7, for example. Sometimes. In this case, in the region where the rope guide 205 is formed or in the vicinity thereof, the rope portion R10 in the last row in the second layer may not enter the gap G1. If such an event occurs, the rope portion R11 of the first row in the third layer is not properly positioned with respect to the rope portion R10 of the last row in the second layer, resulting in The winding state is disturbed, and the rope R cannot be wound on the winding drum 202 in an orderly manner.

The winch drum 1 according to this embodiment has a structure for solving the above problems. Hereinafter, features of the winch drum 1 according to the present embodiment will be described with reference to FIGS. 10 to 17. FIG.

FIG. 10 is a plan view showing the winch drum 1 according to this embodiment. FIG. 11 is a developed view of the winch drum 1 for explaining the arrangement of the rope grooves 4 of the winch drum 1. FIG. 12 is a sectional view of the winch drum 1 taken along line XII-XII in FIG. 10, and FIG. 13 is a sectional view taken along line XIII-XIII of the winch drum in FIG. 14A and 14B are diagrams for explaining the features of the guide region in the first flange 3A of the winch drum 1. FIG. 14 is a cross-sectional view showing the first flange 3A when viewed in the direction of the arrow at the position of the AA line in FIG. 12, and the central view of FIG. 14 is a cross-sectional view showing the first flange 3A when viewed from the position of line B in the direction of the arrow, and the lower view of FIG. 14 is viewed from the position of line CC in FIG. 12 in the direction of the arrow. is a cross-sectional view showing the first flange 3A of. 15 is a cross-sectional view of the winch drum along line XV-XV in FIG. 12, and FIG. 16 is a cross-sectional view of the winch drum along line XVI-XVI in FIG. FIG. 17 is a schematic diagram showing how the ropes are arranged at position P1 in FIG.

As shown in FIGS. 2, 10 and 17, the winch drum 1 according to the present embodiment includes a winding drum 2 on which a rope R is wound in multiple layers, and radial A pair of flanges 3, 3 (a first flange 3A and a second flange 3B) projecting outward in the direction. The winding drum 2 is arranged such that a plurality of rope portions constituting a part of the rope R are arranged in a plurality of rows along the axial direction, which is the direction of the rotation axis K, and arranged in a plurality of layers along the radial direction of the winch drum 1. Take up rope R. The width direction W of the winding drum 2 is parallel to the axial direction of the rotation axis K of the winch drum 1 .

As shown in FIGS. 10, 11 and 17, in the winch drum 1, the rope groove 4 is provided on the outer peripheral surface 20 of the winding drum 2. As shown in FIGS. Of the rope R, the rope portions R1 to R5 of the first layer are wound up in order by entering the rope groove 4 (see FIG. 17).

As shown in FIG. 11, the rope grooves 4 include a plurality of first parallel grooves 4S1 formed in the first parallel portion S1 and arranged in the width direction W, and a plurality of first parallel grooves 4S1 formed in the first intersection portion T1 and arranged in the width direction W. a first inclined groove 4T1, a plurality of second parallel grooves 4S2 formed in the second parallel portion S2 and arranged in the width direction W, and a plurality of second inclined grooves 4S2 formed in the second intersection portion T2 and arranged in the width direction W groove 4T2. The first parallel portion S1, the first crossing portion T1, the second parallel portion S2, and the second crossing portion T2 are arranged in this order in the circumferential direction on the outer peripheral surface 20 of the winding drum 2. As shown in FIG.

The plurality of first parallel grooves 4S1 of the first parallel portion S1 and the plurality of second parallel grooves 4S2 of the second parallel portion S2 are grooves parallel to the circumferential direction of the outer peripheral surface 20 of the winding drum 2. The plurality of first inclined grooves 4T1 at the first intersection T1 and the plurality of second inclined grooves 4T2 at the second intersection T2 are grooves inclined with respect to the circumferential direction of the outer peripheral surface 20 of the winding drum 2 . A plurality of inclined grooves 4T1 and 4T2 at these intersections T1 and T2 are inclined in the same direction.

Specifically, in the developed view of FIG. 11 , the portion indicated by the dashed line Z at the upper end and the portion indicated by the dashed line Z at the lower end are connected to each other in the winding drum 2 of the actual winch drum 1. The same position on the outer peripheral surface 20 of the barrel 2 . The first parallel groove 4S1 indicated by an arrow AL1 on the upper right in FIG. 11 is a parallel groove positioned in the first row of the first parallel portion S1, and the first parallel groove 4S1 indicated by an arrow AL2 on the lower right in FIG. Similarly, it is a parallel groove located in the first row of the first parallel portion S1. The first parallel groove 4S1 indicated by an arrow AL6 on the upper right in FIG. 11 is a parallel groove positioned in the second row of the first parallel portion S1, and the first parallel groove 4S1 indicated by an arrow AL7 on the lower right in FIG. is similarly a parallel groove located in the second row of the first parallel portion S1.

The plurality of first parallel grooves 4S1 illustrated in the lower part of the developed view of FIG. 11 are connected to the plurality of first inclined grooves 4T1 illustrated in the upper part thereof. The plurality of first inclined grooves 4T1 are connected to the plurality of second parallel grooves 4S2 shown above. The plurality of second parallel grooves 4S2 are connected to the plurality of second inclined grooves 4T2 shown above. The second inclined grooves 4T2 are connected to a plurality of first parallel grooves 4S1 shown above. In this manner, the plurality of first parallel grooves 4S1, the plurality of first inclined grooves 4T1, the plurality of second parallel grooves 4S2, and the plurality of second inclined grooves 4T2 are connected to each other in the circumferential direction. A single continuous rope groove 4 is constructed.

For example, when the winding start position of the rope R is set to the first parallel groove 4S1 indicated by the upper right arrow AL1, the rope R enters the first parallel groove 4S1 and is wound along the arrow AL1. When it reaches the position indicated by the dashed-dotted line Z at the upper end, it enters the first parallel groove 4S1 indicated by the lower right arrow AL2 and is wound along the arrow AL2. After that, the rope R is further divided into the first inclined groove 4T1 of the first crossing portion T1 indicated by the arrow AL3, the second parallel groove 4S2 of the second parallel portion S2 indicated by the arrow AL4, and the second crossing portion T2 indicated by the arrow AL5. The second inclined groove 4T2 and the first parallel groove 4S1 of the first parallel portion S1 indicated by arrows AL6 and AL7 are entered in this order and wound up. In the same manner, the rope R is wound into one continuous rope groove 4 described above.

More specifically, the plurality of first inclined grooves 4T1 at the first intersection T1 have the following functions when the rope R is wound around the winding drum 2. That is, each of the rope portions R1 to R5 of the first layer enters the corresponding first inclined groove 4T1, thereby shifting the position of each of the rope portions R1 to R5 by 1/2 pitch (approximately the radius of the rope R) to the second groove. It is moved in a direction approaching the flange 3B. Similarly, the plurality of second inclined grooves 4T2 at the second intersection T2 have the following functions when the rope R is wound around the winding drum 2. As shown in FIG. That is, each of the rope portions R1 to R5 of the first layer enters the corresponding second inclined groove 4T2, thereby shifting the position of each of the rope portions R1 to R5 by 1/2 pitch (approximately the radius of the rope R) to the second groove. It is moved in a direction approaching the flange 3B. Therefore, when the rope R goes around the winding drum 2, the position of the rope R moves in a direction approaching the second flange 3B by one pitch (approximately the diameter of the rope R).

Also, as shown in FIG. 11, the final row 4E at the second intersection T2 is configured such that the width of the rope groove 4 is reduced from 1 pitch to 1/2 pitch when the rope R is wound. Therefore, the rope R that has entered the rope groove 4 of the last row 4E of the first layer does not enter the rope groove 4 of the last row 4E as the winding progresses, and is pushed up to the first row of the second layer.

The rope portion of the upper layer (for example, the rope portion R12 of the third layer in FIG. 10) is in the lower layer of the rope portion R12 at the first parallel portion S1 shown in FIG. 11 when viewed from above as shown in FIG. parallel to two adjacent rope portions (e.g. rope portions R9 and R10 of the second layer in FIG. 10) and, as shown in FIG. located above. In addition, the rope portion of the upper layer (for example, the rope portion R12 of the third layer in FIG. 10) is located in the lower layer of the rope portion R12 at the second parallel portion S2 shown in FIG. 11 when viewed from above as shown in FIG. and parallel to two adjacent rope portions (e.g. rope portions R8 and R9 of the second layer in FIG. 10), and the valley formed by these rope portions R8,9 as shown in FIG. located directly above the That is, in the first parallel portion S1 and the second parallel portion S2, the rope portion of the upper layer is shifted in the width direction W by 1/2 pitch from the rope portion of the lower layer immediately below.

The rope portion of the upper layer (for example, the rope portion R12 of the third layer in FIG. 10) is located at the first intersection T1 shown in FIG. 11 when viewed from above as shown in FIG. intersects with the rope portion R9) of the second layer at As a result, for example, the rope portion R12 of the third layer is formed by the rope portions R8 and R9 of the second layer from a position just above the valley formed by the rope portions R9 and R10 of the second layer. to a position directly above the valley below. Similarly, the rope portion of the upper layer intersects the rope portion of the lower layer at the second intersection T2 shown in FIG. 11 when viewed from above.

The first parallel portion S1 is provided in a region that occupies, for example, 1/3 of the outer peripheral surface 20 of the winding drum 2 in the circumferential direction. The second parallel portion S2 is provided, for example, in a region occupying the other one-third of the outer peripheral surface 20 of the winding drum 2 in the circumferential direction. The first crossing portion T1 is provided in a region that occupies, for example, 1/6 of the outer peripheral surface 20 of the winding drum 2 in the circumferential direction. The second crossing portion T2 is provided, for example, in a region occupying the other 1/6 of the outer peripheral surface 20 of the winding drum 2 in the circumferential direction.

In other words, in the cross-section perpendicular to the rotation axis K on the outer peripheral surface 20 of the winding drum 2, the central angle formed by connecting both ends of the first parallel portion S1 in the circumferential direction and the rotation axis K is 120 degrees. , the central angle formed by connecting both ends of the second parallel portion S2 in the circumferential direction and the rotation axis K is 120 degrees. The central angle formed by connecting both ends of the first crossing portion T1 in the circumferential direction and the rotation axis K is 60 degrees, and the both ends of the second crossing portion T2 in the circumferential direction and the rotation axis K are The central angle formed by tying is 60 degrees. However, the range (proportion) in which the parallel portions S1, S2 and the crossing portions T1, T2 are provided is not limited to the above specific example.

As shown in FIGS. 10-17, the first flange 3A has a guide area 5A and the second flange 3B has a guide area 5B. Each of the

guide regions

5A, 5B guides the first row of rope segments so that they are properly positioned, and guides the last row of rope segments so that they are properly positioned. to reserve space for the rope section of the last row.

　As shown in Figures 12, 15 and 17, the guide region 5A of the first flange 3A includes a plurality of rope guides 51, 53, 55, 57 and a plurality of guide recesses 62, 64, 66. As shown in FIGS. 13, 16 and 17, the guide region 5B of the second flange 3B includes multiple rope guides 52, 54, 56 and multiple guide recesses 63, 65. As shown in FIG. The guide region 5A of the first flange 3A and the guide region 5B of the second flange 3B are provided at positions facing each other in the axial direction (width direction W). In the present embodiment, as shown in FIG. 11, the

guide regions

5A and 5B are formed in a portion corresponding to the first crossing portion T1, and the second crossing portion T2, the first parallel portion S1 and the second parallel portion It is not formed at the site corresponding to S2.

As shown in FIGS. 10, 14, 15 and 17, each of the plurality of rope guides 51, 53, 55, 57 of the first flange 3A extends from the inner surface 3S of the first flange 3A toward the second flange 3B. It has a shape that protrudes from the As shown in FIGS. 10, 16 and 17, each of the rope guides 52, 54, 56 of the second flange 3B has a shape protruding from the inner surface 3S of the second flange 3B toward the first flange 3A. have. Each of the plurality of rope guides 51 to 57 has a triangular shape when viewed from the outside in the radial direction.

As shown in FIGS. 12 and 15, a plurality of rope guides 51, 53, 55, 57 in the guide region 5A of the first flange 3A are formed at sites corresponding to odd-numbered layers among the plurality of layers. The rope guide 51 guides the rope portion R1 of the first row in the first layer. However, in this embodiment, since the groove 4 is formed in the outer peripheral surface 20 of the winding drum 2, the rope guide 51 can be omitted. Therefore, the plurality of rope guides in the guide region 5A may be formed only in three or more odd layers.

As shown in FIGS. 10 and 17, the rope guides 53 are arranged in the third layer so that the rope portions R11 in the first row in the third layer intersect the rope portions R10 in the last row in the second layer. It guides a row of rope portions R11. In this case, the second layer is an example of a specific layer, and the third layer is an example of a specific upper layer.

The rope guide 55 guides the rope portion of the first row in the fifth layer so that the rope portion of the first row in the fifth layer crosses the rope portion of the last row in the fourth layer. In this case, the fourth layer is an example of a specific layer, and the fifth layer is an example of a specific upper layer.

The rope guide 57 guides the rope portion of the first row of the seventh layer so that the rope portion of the first row of the seventh layer crosses the rope portion of the last row of the sixth layer. In this case, the sixth layer is an example of a specific layer, and the seventh layer is an example of a specific upper layer.

As shown in FIGS. 12 and 15, the plurality of guide recesses 62, 64, 66 of the guide region 5A in the first flange 3A are formed at sites corresponding to even-numbered layers among the plurality of layers.

As shown in FIGS. 15 and 17, the guide recess 62 is a recess at a portion corresponding to the rope portion R10 of the last row in the second layer. From the rope guides 51 and 53 positioned inside and outside the guide recess 62 in the radial direction, the guide recess 62 allows a part of the rope portion R10 in the final row to enter during rope winding. It has a shape that is recessed in the axial direction, which is the direction of the rotation axis K (see FIG. 15).

The guide recess 64 is a recess at a portion corresponding to the rope portion of the final row in the fourth layer. The guide recesses 64 are provided with rope guides 53 and 53 positioned radially inside and outside the guide recesses 64 so that a part of the rope portion of the last row in the fourth layer can enter during rope winding. 55 has a shape recessed in the axial direction (see FIG. 15).

The guide recess 66 is a recess at a portion corresponding to the rope portion of the last row in the sixth layer. The guide recesses 66 are provided with rope guides 55 and 55 positioned radially inside and outside the guide recesses 66 so that a portion of the rope portion in the last row in the sixth layer can enter during rope winding. 57 has a shape recessed in the axial direction (see FIG. 15).

As shown in FIGS. 13 and 16, the plurality of rope guides 52, 54, 56 in the guide region 5B of the second flange 3B are formed at sites corresponding to even-numbered layers among the plurality of layers.

As shown in FIGS. 10 and 17, the rope guides 52 are arranged such that the first row rope portion R6 of the second layer intersects the last row rope portion R5 of the first layer. Guide part R6. In this case, the first layer is an example of a specific layer, and the second layer is an example of a specific upper layer.

The rope guide 54 guides the rope portion of the first row in the fourth layer so that the rope portion of the first row in the fourth layer crosses the rope portion of the last row in the third layer. In this case, the third layer is an example of a specific layer, and the fourth layer is an example of a specific upper layer.

The rope guide 56 guides the rope portion of the first row in the sixth layer so that the rope portion of the first row in the sixth layer crosses the rope portion of the last row in the fifth layer. In this case, the fifth layer is an example of a specific layer, and the sixth layer is an example of a specific upper layer.

As shown in FIGS. 13 and 16, the plurality of guide recesses 63 and 65 in the guide region 5B of the second flange 3B are formed in odd-numbered layers (three or more odd-numbered layers in this embodiment) of the plurality of layers. They are formed in corresponding parts.

As shown in FIGS. 16 and 17, the guide recess 63 is a recess at a portion corresponding to the rope portion of the last row in the third layer. The guide recesses 63 are provided with rope guides 52 and 52 positioned radially inside and outside the guide recesses 63 so that a portion of the rope portion in the last row of the third layer can enter during rope winding. 54, it has a shape that is recessed in the axial direction, which is the direction of the rotation axis K (see FIG. 16).

The guide recess 65 is a recess at a portion corresponding to the rope portion of the last row in the fifth layer. The guide recesses 65 are provided with rope guides 54 and 54 positioned radially inside and outside the guide recesses 65 so that a part of the rope portion of the last row in the fifth layer can enter when the rope is wound. 56 has a shape recessed in the axial direction (see FIG. 16).

Each of the plurality of rope guides 51-57 has a guide start end 153, a guide end end 154, and a top portion 150. The guide start end 153 is the start end of the rope guide located at the boundary between the rope guide and the inner surface 3S. is the part adjacent to The guide end 154 is the end of the rope guide located at the boundary between the rope guide and the inner surface 3S, and is the last portion of the rope guide that the rope portion of the first row adjoins during rope winding. The apex 150 is a ridge line located between the guide starting end 153 and the guide terminating end 154, and is the leading end of the rope guide in the projecting direction (the axial direction).

Each of the plurality of guide recesses 62-66 has a recess start end 163 and a recess end end 164. A recess start end 163 is a portion of the guide recess that the rope portion of the last row first adjoins during rope winding. The recess end 164 is the last portion of the guide recess that the last row of rope sections adjoins during rope winding.

The recess starting end 163 is located closer to the guide starting end 153 of the rope guide than to the top 150 of the rope guide. Specifically, for example, as shown in FIG. 13, the recess starting end 163 of the guide recess 63 is positioned closer to the guide recess 63 than the top 150 of the rope guide 54 adjacent to the guide recess 63 in the radial direction. It is located close to 153.

The recessed end 164 is located closer to the guide end 154 of the rope guide than to the top 150 of the rope guide. Specifically, for example, as shown in FIG. 13 , the recess end 164 of the guide recess 63 is positioned closer to the guide recess 63 than the top 150 of the rope guide 54 radially adjacent to the guide recess 63 . It is located close to 154.

12 and 13, the recess starting ends 163 of the plurality of guide recesses 62 to 66 are located at positions corresponding to the guide starting ends 153 of the rope guides, and The recessed end 164 is at a position corresponding to the guide end 154 of the rope guide.

Specifically, in the guide region 5A of the first flange 3A, the recess starting ends 163 of the plurality of guide recesses 62, 64, 66 each include the guide starting ends 153 of the rope guides 51, 53, 55, 57. (starting side straight line C3 to be described later) or adjacent to the straight line.

Similarly, in the guide region 5B of the second flange 3B, the recess starting ends 163 of the plurality of guide recesses 63 and 65 are formed by imaginary straight lines (starting side straight lines) including the guide starting ends 153 of the plurality of rope guides 52, 54 and 56 C3) is positioned above or adjacent to the straight line.

In the guide region 5A of the first flange 3A, the concave ends 164 of the plurality of guide

concave portions

62, 64, 66 are formed by imaginary straight lines (described later) that include the guide ends 154 of the rope guides 51, 53, 55, 57. It is arranged on the terminal side straight line C2) or at a position adjacent to the straight line.

Similarly, in the guide region 5B of the second flange 3B, the recess ends 164 of the plurality of guide recesses 63, 65 are aligned with an imaginary straight line that includes the guide ends 154, 154, 154 of the plurality of rope guides 52, 54, 56. It is arranged at a position on or adjacent to (Terminal Side Straight Line C2).

More specifically, in the guide region 5A of the first flange 3A, the bottoms of the plurality of guide recesses 62, 64, 66 (that is, the right ends of the plurality of guide recesses 62, 64, 66 in FIG. 15) are the recess start ends. From 163 to the recess end 164, it is located on the plane containing the inner surface 3S of the first flange 3A. Similarly, in the guide region 5B of the second flange 3B, the bottoms of the plurality of guide recesses 63, 65 (that is, the left ends of the plurality of guide recesses 63, 65 in FIG. 16) extend from the recess start end 163 to the recess end end 164, It is located on a plane including the inner surface 3S of the second flange 3B.

As described above, in the winch drum 1 according to the present embodiment, the recess start ends 163 of the guide recesses 62 to 66 are located closer to the guide start ends 153 than the tops 150 of the rope guides. Each recessed end 164 is located closer to the guide end 154 of the rope guide than to the top 150 of the rope guide. Specifically, the recess start ends 163 of the guide recesses 62 to 66 are on the start end straight line C3, and the recess end ends 164 of the guide recesses 62 to 66 are on the end straight line C2. Therefore, these guide recesses can accommodate a part of the rope portion of the last row from the point when the rope portion of the last row in the specific layer reaches the guide area (5A or 5B) during rope winding, and moreover, , the top 150 of the rope guide can be bypassed by continuing to partially accommodate the last row of rope portions until reaching the recessed end 164 at a position corresponding to the guide end 154 rather than the top 150 of the rope guide. This means that even if the load on the rope R during rope winding is small or the flexibility of the rope R is low, the rope portion of the last row in a specific layer is the rope of the row one row before the last row. The event of not entering the gap between the part and the flange (3A or 3B) is suppressed. As a result, disturbance of the winding state of the rope R on the winding drum 2 during rope winding is suppressed.

Also, in the winch drum 1 according to the present embodiment, as shown in FIGS. 12 and 13, the tops 150 of the plurality of rope guides 51 to 57 have a straight shape. In the guide region 5A of the first flange 3A, the tops 150 of the rope guides 51, 53, 55, 57 are positioned on the same straight line when viewed in the axial direction as shown in FIG. An intersection point between the winding drum 2 and a virtual line extending from the top 150 toward the winding drum 2 is defined as a top inner end 150E. In this case, the virtual top line is inclined in the direction opposite to the winding rotation direction D1 (that is, the delivery rotation direction D2) with respect to the reference line C1, which is a straight line passing through the rotation axis K and the top inner end 150E. formed by posture. The reference line C1 is a straight line parallel to the radial direction of the winch drum 1 . In this embodiment, the reference line C1 is a straight line passing through the center of the first intersection T1 in the circumferential direction of the winding drum 2 or its vicinity.

Similarly, in the guide region 5B of the second flange 3B, the tops 150 of the rope guides 52, 54, 56 are positioned on the same straight line when viewed in the axial direction as shown in FIG. An intersection point between the winding drum 2 and a virtual line extending from the top 150 toward the winding drum 2 is defined as a top inner end 150E. In this case, the virtual top line is inclined in the direction opposite to the winding rotation direction D1 (that is, the delivery rotation direction D2) with respect to the reference line C1, which is a straight line passing through the rotation axis K and the top inner end 150E. formed by posture.

Further, in the winch drum 1 according to the present embodiment, as shown in FIGS. 12 and 13, each of the plurality of rope guides 51 to 57 is arranged in the radial direction when the rope guide is viewed in the axial direction. The outer portion has a shape such that the circumferential distance between the top portion 150 and the guide end portion 154 increases. Further, in each of the plurality of rope guides 51 to 57, when the rope guide is viewed in the axial direction, the outer portion in the radial direction has a larger distance in the circumferential direction between the top portion 150 and the guide starting end 153. It has a shape like

Below, these features will be explained in detail. As shown in FIGS. 12-14, each of the plurality of rope guides 51-57 has a first inclined surface 151 and a second inclined surface 152. As shown in FIG. The first inclined surface 151 and the second inclined surface 152 are arranged in the circumferential direction of the winch drum 1 . The inner edges of the first inclined surface 151 and the second inclined surface 152 are connected to each other at the top portion 150 . The first inclined surface 151 is located in the winding rotation direction D1 with respect to the top portion 150, and the second inclined surface 152 is located on the opposite side of the winding rotation direction D1 with respect to the top portion 150 (delivery rotation direction D2). It is a plane located in The first inclined surface 151 is a surface facing the rope R during rope winding. The second inclined surface 152 is adjacent to the first inclined surface 151 on the side opposite to the winding rotation direction D1, and is a surface that the rope R faces after the first inclined surface 151 during rope winding.

The first inclined surface 151 has the guide start end 153, which is an outer edge located at a position displaced from the top portion 150 in the winding rotation direction D1. Guide starting ends 153 of the plurality of rope guides 51, 53, 55, 57 on the first flange 3A are positioned on the same straight line when viewed in the axial direction as shown in FIG. Guide starting ends 153 of the plurality of rope guides 52, 54, 56 on the second flange 3B are positioned on the same straight line when viewed in the axial direction as shown in FIG. Guide starting ends 153 of the plurality of rope guides 51, 53, 55, 57 in the first flange 3A are on the same plane as the inner surface 3S of the first flange 3A. Guide starting ends 153 of the plurality of rope guides 52, 54, 56 on the second flange 3B are on the same plane as the inner surface 3S of the second flange 3B. The inner surface 3S of the first flange 3A and the inner surface 3S of the second flange 3B are parallel to the plane perpendicular to the rotation axis K.

The first inclined surface 151 is inclined with respect to a plane perpendicular to the rotation axis K. Specifically, the first inclined surface 151 of each of the plurality of rope guides 51, 53, 55, 57 in the first flange 3A approaches the second flange 3B as it goes from the guide start end 153 toward the top 150. It is inclined with respect to the inner surface 3S of the 1 flange 3A. The first inclined surface 151 of each of the plurality of rope guides 52, 54, 56 on the second flange 3B is formed on the inner surface 3S of the second flange 3B so as to approach the first flange 3A from the guide starting end 153 toward the top 150. tilted towards.

The second inclined surface 152 has the guide end 154, which is an outer side, at a position shifted from the top 150 to the opposite side of the winding rotation direction D1 (delivery rotation direction D2). The guide ends 154 of the plurality of rope guides 51, 53, 55, 57 on the first flange 3A are located on the same straight line when viewed in the axial direction as shown in FIG. The guide ends 154 of the plurality of rope guides 52, 54, 56 on the second flange 3B are located on the same straight line when viewed in the axial direction as shown in FIG. Guide ends 154 of the plurality of rope guides 51, 53, 55, 57 on the first flange 3A are flush with the inner surface 3S of the first flange 3A. Guide ends 154 of the plurality of rope guides 52, 54, 56 on the second flange 3B are flush with the inner surface 3S of the second flange 3B.

The second inclined surface 152 is inclined with respect to a plane perpendicular to the rotation axis K. Specifically, the second inclined surface 152 of each of the plurality of rope guides 51, 53, 55, 57 in the first flange 3A approaches the second flange 3B as it goes from the guide end 154 toward the top 150. It is inclined with respect to the inner surface 3S of the 1 flange 3A. The second inclined surface 152 of each of the plurality of rope guides 52, 54, 56 on the second flange 3B is on the inner surface 3S of the second flange 3B so as to approach the first flange 3A from the guide end 154 toward the top 150. tilted towards.

The tops 150 of the plurality of rope guides 51 , 53 , 55 , 57 are formed between the outer peripheral surface 20 of the winding drum 2 and the outer periphery 30 of the flange 3 . The apex 150 of each of the plurality of rope guides 51, 53, 55, 57 has a shape such that it moves away from the reference line C1 as it goes from its radial inner end to its radial outer end.

As shown in FIG. 12, the inclination angle θ1 of the top portion 150 with respect to the reference line C1 when the first flange 3A is viewed in the axial direction of the rotation axis K is not particularly limited, but is preferably 10° to 20°. is preferably in the range of , more preferably in the range of 12° to 18°, even more preferably in the range of 14° to 16°.

The first inclined surface 151 may be flat, curved, or a combination thereof. Similarly, the second inclined surface 152 may be flat, curved, or a combination thereof.

In the present embodiment, the guide starting ends 153 of the plurality of rope guides 51 to 57 (the guide starting ends 153 of the first inclined surfaces 151) are at positions shifted in the winding rotation direction D1 with respect to the reference line C1. When the rope guide is viewed in the axial direction, the distance between the top portion 150 and the guide starting end 153 in the circumferential direction increases toward the outer portion in the radial direction.

Further, in the present embodiment, the guide ends 154 of the plurality of rope guides 51 to 57 (the guide ends 154 of the second inclined surfaces 152) are deviated from the reference line C1 in the delivery rotation direction D2, When the rope guide is viewed in the axial direction, the distance between the top portion 150 and the guide end 154 in the circumferential direction increases toward the outer portion in the radial direction.

L1 shown in FIG. 17 is a virtual straight line (top virtual line) including the tops 150 of the plurality of rope guides 51, 53, 55, 57 on the first flange 3A, and the plurality of rope guides 52, 54, 54, 54 on the second flange 3B. 56 is the dimension (dimension between guides) between an imaginary straight line (top imaginary line) containing the top part 150 of 56 and . This guide-to-guide dimension L1 is set, for example, to a dimension obtained by multiplying the number of rope rows in each layer by the rope diameter or a value close to this dimension. Therefore, the rope R is in a state in which multiple layers of rope portions are substantially overlapped vertically, as shown in FIG. On the other hand, in the portions corresponding to the first parallel portion S1 and the second parallel portion S2, the upper layer rope portion is positioned in the valley formed by the two lower layer rope portions.

In this embodiment, the rope R is wound by the winch drum 1 as follows, as in the reference example described above. First, as shown in FIG. 17, rope portions R1 to R5 of the first layer of the rope R enter the rope groove 4 and are wound up in an orderly manner. Then, the rope portion R6 in the first row of the second layer is guided by the rope guide from a position closer to the flange 3B than the rope portion R5 of the first layer as shown in FIG. It moves directly above the rope portion R5 and, guided by the rope guide, moves directly above the valley formed by the rope portion R4 (not shown in FIG. 10) and the rope portion R5 of the first layer. In this manner, the rope portions R6 to R10 of the second layer are wound up in an orderly manner. Then, the rope portion R11 in the first row of the third layer is guided by the rope guides, as in the case of the rope portion R6, to reach the center of the valley formed by the rope portions R9 and R10 of the second layer. Move up. In this manner, the rope portions R11 to R15 of the third layer are wound up in order.

FIG. 18 is a plan view showing the winch drum 1 according to this embodiment. FIG. 18 is a diagram showing a state in which a gap G2 is generated between the rope R and the flange 3A due to the diameter reduction of the rope R. As shown in FIG. Compared to the case where the diameter of the rope R is ideal, if the diameter of the rope R becomes smaller as shown in FIG. 2 will be positioned close to the flange 3B. As a result, the gap G2 between the rope portion R10 in the last row (fifth row) of the second layer and the flange 3A becomes larger.

For this reason, as in the winch drum according to the reference example shown in FIG. When it is on the top, that is, when it is located on the reference line C1, the rope part R11 of the first row of the third layer is located on the lower layer (second layer) even at the position facing the top 250 of the rope guide 205 can not be located directly above the rope portion R10 of the , and will be shifted to a position closer to the flange 203A. As a result, a large gap is formed between the rope portion R11 of the first row and the rope portion R12 of the second row of the third layer.

On the other hand, in the present embodiment, as shown in FIG. 12, the apex 150 of each of the plurality of rope guides is positioned on the opposite side of the winding rotation direction D1 from the inner end to the outer end of the apex 150 with respect to the reference line C1. It has a shape such that it goes away in (the delivery rotation direction D2). Therefore, as shown in FIG. 18, even if the gap G2 between the rope portion R10 of the last row of the second layer and the first flange 3A is large, the rope portion R11 of the first row of the third layer is , at a position corresponding to the top 150 of the rope guide, substantially directly above the underlying rope portion R10. This is because, at the first intersection T1 on the winch drum 1, the rope portion R10 in the lower layer moves toward the guide end 154 of the second inclined surface 152 from the position corresponding to the guide starting end 153 of the first inclined surface 151 toward the first flange. This is because it is arranged so as to approach the inner surface 3S of 3A.

Therefore, in this embodiment, since the rope portion R11 in the first row of the third layer can effectively obtain the guiding effect of the rope guide, as shown in FIG. It is possible to climb over the inner side in the width direction W and move directly above the valley formed by the rope portions R9 and R10 of the second layer. As a result, even if the diameter of the rope R is smaller than the ideal size, a large gap is formed between the rope portion R11 in the first row and the rope portion R12 in the second row of the third layer. It is possible to suppress the occurrence of the problem that the

Another reason why the top portion 150 is inclined with respect to the reference line C1 as shown in FIG. 12 in this embodiment is to solve the following problem. That is, due to the diameter of the rope R being smaller than the ideal dimension, among the plurality of layers formed by the rope R wound on the winding drum 2, the layer located radially outward is , the gap G2 between the rope R and the first flange 3A may accumulate and become large. That is, in the winch drum 1, the rope portion of the upper layer is basically wound up as a rail in the valley between two adjacent rope portions of the lower layer. For this reason, the arrangement state of the rope portions in the upper layer is affected to some extent by the arrangement state of the rope portions in the lower layer. Therefore, when a certain layer is arranged such that a gap G2 is formed between the rope portion of the last row and the inner surface 3S of the flange 3, the arrangement of the upper layer is affected by the arrangement of the lower layer, Furthermore, the arrangement of the upper layer is affected by the arrangement state of the two lower layers. In this manner, among the plurality of layers, the gap between the rope portion in the last row and the inner surface 3S of the flange 3 tends to accumulate in the layer positioned radially outward of the winding drum 2 . Therefore, the gap G2 between the rope portion in the last row and the inner surface 3S of the flange 3 tends to increase as the layer is located radially outward.

In order to solve the problem of the accumulation of such gaps G2, in the present embodiment, the top portion 150 is arranged such that it moves away from the reference line C1 toward the opposite side of the winding rotation direction D1 as it goes from the inner end to the outer end. A configuration of having a shape is adopted. As a result, the distance that the top portion 150 of the rope guide separates from the reference line C1 on the side opposite to the winding rotation direction D1 increases radially outward. Therefore, even if the gap G2 between the rope portion of the last row and the inner surface 3S of the flange 3 is cumulatively increased in the layers positioned radially outward among the plurality of layers, the cumulative gap G2 is large. Depending on the requirements, the above distances can be increased. As a result, even in the radially outer layer where the gap G2 is large, the rope portion of the first row rides over the rope portion of the last row of the lower layer to the inside in the width direction W and is arranged at an appropriate position. The rope R can be wound up orderly. As a result, in this embodiment, the effect of winding up the rope R in an orderly manner can be further enhanced.

As shown in FIGS. 12 and 13, in this embodiment, the distance that the guide end 154, which is the outer edge of the second inclined surface 152, is separated from the reference line C1 on the opposite side of the winding rotation direction D1 is It increases from the inner end of the termination 154 toward the outer end. Therefore, compared to the case where the guide end 154 is parallel to the reference line C1, in the present embodiment, the second inclined surface 152 can be provided even at a position farther away from the reference line C1 on the opposite side of the winding rotation direction D1. becomes possible. That is, in the second embodiment, a rope guide having a thickness in the direction of the rotation axis K can be provided even at a position farther away from the reference line C1 on the side opposite to the winding rotation direction D1. The range in which a rope guide having such a thickness can be provided increases from the inner end to the outer end of the guide terminal end 154 . By providing such a thickness, there are the following advantages.

That is, among the plurality of layers formed by the rope R wound on the winding drum 2 as described above, the gap between the rope portion of the last row and the inner surface 3S of the flange 3 is increased in the layer positioned radially outward. G2 tends to accumulate and increase. Due to this, it tends to be more difficult for the rope portions of the first row of the upper layer to climb over the rope portions of the last row of the lower layer to the inside in the width direction W in the layers positioned radially outward. Even in such a case, in the present embodiment, the second inclined surface of the rope guide is also positioned farther away from the reference line C1 in the winding rotation direction D1 as the layer is located radially outward. Since the thickness of the part corresponding to 152 is given, the given thickness makes it easy for the rope part of the first row of the upper layer to get over the rope part of the last row of the lower layer to the inside in the width direction W. In addition, the thickness given in this way is such that the rope part of the first row of the upper layer that has overcome the rope part of the last row of the lower layer overcomes the rope part of the lower layer in the opposite direction (outside in the width direction W) and again It also serves to restrict the movement of the flange 3 to return to the position on the inner surface 3S side.

As shown in FIG. 12, in this embodiment, as described above, the guide starting ends 153 of the plurality of rope guides 51 to 57 are aligned in the same direction when viewed in the axial direction as shown in FIGS. This straight line is hereinafter referred to as a start side straight line C3. Further, the guide ends 154 of the plurality of rope guides 51 to 57 are positioned on the same straight line, and this straight line is hereinafter referred to as the "end straight line C2".

The guide starting end 153, which is the outer side of the first inclined surface 151, has a shape inclined with respect to the reference line C1 so that the distance between the guide starting end 153 and the reference line C1 increases radially outward.

As shown in FIG. 12, the inclination angle θ3 of the starting end straight line C3 with respect to the reference line C1 when the first flange 3A is viewed in the axial direction of the rotation axis K is not particularly limited, but is preferably 25°. It is preferably in the range of ~35°, more preferably in the range of 27.5° to 32.5°, even more preferably in the range of 29° to 31°.

In addition, the inclination angle θ2 of the terminal side straight line C2 with respect to the reference line C1 when the first flange 3A is viewed in the axial direction of the rotation axis K is not particularly limited, but is preferably in the range of 25° to 35°. , more preferably in the range of 27.5° to 32.5°, even more preferably in the range of 29° to 31°.

Further, the total angle (θ2+θ3) of the angles θ2 and θ3 is preferably in the range of 50° to 70°, more preferably in the range of 55° to 65°, and even more preferably 58°. ° to 62°.

As shown in FIG. 12, in the present embodiment, the distance that the guide start end 153, which is the outer edge of the first inclined surface 151, separates from the reference line C1 in the winding rotation direction D1 increases radially outward. Become. Therefore, in this embodiment, the inclination angle θ4 (not shown) of the first inclined surface 151 with respect to the inner surface 3S of the flange (3A or 3B) is greater than the case where the guide starting end 153 is parallel to the reference line C1. It becomes smaller from the inner end (inner end in the radial direction) of 153 toward the outer end (outer end in the radial direction). The rope R used in the crane 100 usually has a certain degree of rigidity and not much suppleness. Therefore, if the inclination angle θ4 can be made small, the ropes R in the upper first row can be smoothly guided along the first inclined surface 151 . That is, the first inclined surface 151 having a small inclination angle θ4 gradually bends the rope R of the upper layer so that the rope R of the upper layer crosses the rope R of the last row of the lower layer inward in the width direction W (cross direction W). The rope R of the upper layer can be guided so that the rope R is over. Therefore, in the present embodiment, the rope R can be smoothly crossed over the layer positioned radially outward among the plurality of layers. This means that even if the gap G2 between the rope portion of the last row and the inner surface 3S of the flange (3A or 3B) accumulates and becomes larger in the radially outer layer, the rope portion of the first row is increased. gets over the rope part of the last row of the lower layer to the inside in the width direction W and is easily arranged at an appropriate position.

[Modification]
FIG. 19 is an enlarged side view of a portion of the flange of the winch drum according to the modified example of the embodiment. 19 showing the first flange 3A, the characteristics of the modification will be described below. In this modification, the second flange 3B, not shown, also has the same characteristics as the first flange 3A. ing.

In the modification shown in FIG. 19, the radial dimension at the recess starting end 163 is larger than the radial dimension at the recess terminal end 164 in each of the plurality of guide recesses. Specifically, for example, in the guide region 5A of the first flange 3A, the radial dimension L12 at the recess start end 163 of the guide recess 62 is greater than the radial dimension L22 at the recess end 164 of the guide recess 62. . Similarly, the radial dimension L14 at the recess start end 163 of the guide recess 64 is greater than the radial dimension L24 at the recess terminal end 164 of the guide recess 64, and the radial dimension at the recess start end 163 of the guide recess 66 is The dimension L16 is greater than the radial dimension L26 at the recess end 164 of the guide recess 66 .

When the load on the rope R during rope winding is small or when the flexibility of the rope R is low, the axial direction between the rope portion in the row one row before the last row in the specific layer and the flange (3A or 3B) Not only is the distance at , which is less than the ideal dimension, but the radial position of the last row of rope sections may be shifted radially from the ideal position. Such an event is particularly likely to occur at a relatively early stage when the rope portion of the last row in a particular layer reaches the guide area during rope winding. Also, if the timing at which the rope portion of the first row in a specific layer intersects the rope portion of the last row in the lower layer in the vicinity of the guide region is earlier than the ideal timing, the final row of the rope portion in the specific layer When the rope portion reaches the guide area, the above-described radial displacement is likely to occur. Therefore, in this modification, the radial dimension of the guide recess at the recess start end 163 is set relatively larger than the radial dimension of the guide recess at the recess end end 164. Even if the radial position of is deviated from the ideal position in the radial direction, part of the rope portion in the final row is likely to enter the guide recess from the starting end of the recess.

Further, in this modification, in each of the plurality of guide recesses, the starting end side outer end that is the radially outer end of the recess starting end 163 is the radially outer end of the recess terminal end 164 . It is located outside the end in the radial direction. Specifically, for example, in the guide region 5A of the first flange 3A, a starting end side outer end 163A, which is an outer end in the radial direction at the recess starting end 163 of the guide recess 62, is equal to the diameter at the recess terminal end 164 of the guide recess 62. It is positioned outside in the radial direction of the terminating side outer end 164A, which is the outer end in the direction. That is, the distance between the rotation axis K and the start side outer end 163A is greater than the distance between the rotation axis K and the terminal side outer end 164A. Similarly, the starting end side outer end 163B, which is the radially outer end of the recess starting end 163 of the guide recess 64, is closer to the terminating end side outer end 164B, which is the radially outer end of the recess terminal end 164 of the guide recess 64. is positioned radially outward, and a starting end side outer end 163C, which is the radially outer end at the recess starting end 163 of the guide recess 66, is located at the radially outer end 164 of the guide recess 66. It is positioned outside in the radial direction of the terminating side outer end 164C, which is the end.

The radial position of the rope portion in the last row as described above is particularly prone to shifting outward in the radial direction. Therefore, in this modification, the radial dimension of the guide recess at the recess start end 163 is larger than the radial dimension of the guide recess at the recess end end 164, and the outer end of the recess start end 163 on the start end side is the recess end end 164. Therefore, even if the radial position of the rope portion of the last row is shifted radially outward from the ideal position , part of the rope portion in the last row is more likely to enter the guide recess from the starting end of the recess.

Also, in this modification, the radial dimension of the guide recess at the portion corresponding to the top 150 of the rope guide is greater than the radial dimension at the recess end 164 . This makes it easier for a portion of the rope portion in the last row to enter the guide recess at the portion corresponding to the top portion 150 of the rope guide. Specifically, it is as follows.

As shown in FIG. 19, for example, in the guide region 5A of the first flange 3A, the guide recess 62 is located at a position corresponding to the inner end of the top portion 150 of the rope guide 53 adjacent to the guide recess 62 radially outwardly. It has an intermediate section outer edge 165A which is an outer edge located at . The inner end of the top portion 150 is the end located inside the top portion 150 in the radial direction. The radial dimension L32 of the guide recess 62 at the portion including the intermediate outer end 165A is larger than the radial dimension L22 at the recess terminal end 164 of the guide recess 62 . In this modification, the dimension L32 is the same as the radial dimension L12 at the recess start end 163 of the guide recess 62, but may be larger or smaller than the dimension L12. Note that the relationship between the dimension L12, the dimension L22, and the dimension L32 is not limited to the above relationship. For example, dimension L12 may be greater than dimension L22 and dimension L32, in which case dimension L22 may be the same as dimension L32, or may be greater or less than dimension L32.

Similarly, the guide recess 64 has an intermediate outer end 165B, which is an outer end located corresponding to the inner end of the top 150 of the rope guide 55 adjacent to the guide recess 64 on the outer side in the radial direction. The radial dimension L34 of the guide recess 64 at the portion including the intermediate outer end 165B is greater than the radial dimension L24 at the recess terminal end 164 of the guide recess 64 . In this modification, the dimension L34 is the same as the radial dimension L14 at the recess start end 163 of the guide recess 64, but may be larger or smaller than the dimension L14. In addition, the relationship between the dimension L14, the dimension L24, and the dimension L34 is not limited to the above relationship. For example, dimension L14 may be greater than dimension L24 and dimension L34, in which case dimension L24 may be the same as dimension L34, or may be greater or less than dimension L34.

The guide recess 66 has an intermediate outer end 165C, which is an outer end positioned corresponding to the inner end of the top 150 of the rope guide 57 adjacent to the guide recess 66 on the outer side in the radial direction. The radial dimension L36 of the guide recess 66 at the portion including the intermediate outer end 165C is larger than the radial dimension L26 at the recess terminal end 164 of the guide recess 66 . In this modification, the dimension L36 is the same as the radial dimension L16 at the recess start end 163 of the guide recess 66, but may be larger or smaller than the dimension L16. Note that the relationship between the dimension L16, the dimension L26, and the dimension L36 is not limited to the above relationship. For example, dimension L16 may be greater than dimension L26 and dimension L36, in which case dimension L26 may be the same as dimension L36, or may be greater or less than dimension L36.

The radial dimension at the recess start end 163 of the guide recess may be larger than the radial dimension at the recess start end 163 of the guide recess located radially inside the guide recess. Specifically, dimension L16 may be greater than dimension L14, and dimension L14 may be greater than dimension L12.

The radial dimension of the guide recess in the portion including the outer end of the intermediate portion is greater than the radial dimension of the portion including the outer end of the intermediate portion in the guide recess positioned radially inside the guide recess. can also be large. Specifically, dimension L36 may be greater than dimension L34, and dimension L34 may be greater than dimension L32.

Further, in this modification, the distance between the rotating shaft K of the winch drum 1 and the outer end of the intermediate portion of the guide recess is the same as the distance between the rotating shaft K and the outer end of the guide recess on the starting end side. It is larger than the distance between K and the terminating outer end of the guide recess. Specifically, it is as follows.

The distance between the rotating shaft K and the intermediate outer end 165A of the guide recess 62 is the same as the distance between the rotating shaft K and the starting end side outer end 163A of the guide recess 62, and the rotating shaft K and the guide recess 62 outside the terminal end side. greater than the distance to edge 164A. In the guide recess 62, the start side outer end 163A and the intermediate portion outer end 165A are smoothly connected by an arc-shaped curve, and the intermediate portion outer end 165A and the terminal side outer end 164A are smoothly connected by a spline curve. .

The distance between the rotation axis K and the intermediate outer end 165B of the guide recess 64 is the same as the distance between the rotation axis K and the start end side outer end 163B of the guide recess 64, and the rotation axis K and the guide recess 64 outside the end side. greater than the distance to end 164B. In the guide recess 64, the start side outer end 163B and the intermediate portion outer end 165B are smoothly connected by an arc-shaped curve, and the intermediate portion outer end 165B and the terminal side outer end 164B are smoothly connected by a spline curve. .

The distance between the rotating shaft K and the intermediate outer end 165C of the guide recess 66 is the same as the distance between the rotating shaft K and the starting end side outer end 163C of the guide recess 66, and the rotating shaft K and the guide recess 66 outside the terminal end side. greater than the distance to end 164C. In the guide recess 66, the start side outer end 163C and the intermediate portion outer end 165C are smoothly connected by an arc-shaped curve, and the intermediate portion outer end 165C and the terminal side outer end 164C are smoothly connected by a spline curve. .

It should be noted that the positions of the outer end on the starting end side, the outer end on the intermediate part side, and the outer end on the terminal side of the guide recess, and the dimensions in the radial direction are not limited to the specific examples described above, and may be set as follows, for example.

That is, in the guide recess, the intermediate portion outer end may be positioned radially outside the starting end side outer end and the terminal end side outer end. In other words, the distance between the rotation axis K and the outer end of the intermediate portion of the guide recess is greater than the distance between the rotation axis K and the outer end of the guide recess on the starting end side, and the distance between the rotation axis K and the outer end of the guide recess It may be larger than the distance to the edge. In this case, in the guide recess, the start side outer end and the intermediate portion outer end are smoothly connected by a spline curve, and the intermediate portion outer end and the terminal side outer end are smoothly connected by a spline curve. The distance between the rotating shaft K and the outer end of the guide recess on the starting end side may be the same as the distance between the rotating shaft K and the outer end on the trailing end side of the guide recess. It may be larger than the distance to the edge. In the case of such a form, a portion of the rope portion in the last row is likely to enter the guide recess at a portion corresponding to the top portion 150 of the rope guide in the guide recess.

Also, in the guide recess 62 shown in FIG. 19, the dimension L32 may be larger than the dimensions L12 and L22, and in the guide recess 64, the dimension L34 may be larger than the dimensions L14 and L24. At 66, dimension L36 may be greater than dimension L16 and dimension L26. In the case of such a form, a portion of the rope portion in the last row is likely to enter the guide recess at a portion corresponding to the top portion 150 of the rope guide in the guide recess. In addition, in the guide recessed part 62, the dimension L12 may be the same as the dimension L22, and may be larger than the dimension L22. Similarly, in the guide recess 64, the dimension L14 may be the same as the dimension L24 or may be greater than the dimension L24. In the guide recess 66, the dimension L16 may be the same as the dimension L26 or may be greater than the dimension L26.

The present disclosure is not limited to the embodiments described above. The present disclosure includes, for example, the following aspects.

The guide starting end 153 of the rope guide may be parallel to the reference line C1, and the guide end 154 of the rope guide may be parallel to the reference line C1.

The recess start end 163 of the guide recess does not necessarily have to be arranged at a position corresponding to the guide start end 153 of the rope guide. may be placed.

The recess terminal end 164 of the guide recess does not necessarily have to be arranged at a position corresponding to the guide terminal end 154 of the rope guide, and is shifted from the guide terminal end 154 in the winding rotation direction D1 or the delivery rotation direction D2. may be placed.

The guide starting ends 153 of the plurality of rope guides may not necessarily be arranged on the same straight line, and at least one of these guide starting ends 153 is aligned with the other guide starting ends 153 in the winding rotation direction D1 or the delivery rotation direction D2. may be arranged at a position shifted to Likewise, the guide ends 154 of the rope guides may not necessarily be collinear, and at least one of these guide ends 154 may be aligned with respect to the other guide ends 154 in the winding rotational direction D1 or the payout direction. It may be arranged at a position shifted in the rotational direction D2. In addition, the top portions 150 of the plurality of rope guides may not necessarily be arranged on the same straight line, and at least one of these top portions 150 is arranged in the winding rotation direction D1 or the delivery rotation direction D2 with respect to the other top portions 150. They may be arranged at shifted positions.

Further, in the above-described embodiment, the bottom of the guide recess is located on the plane including the inner surface 3S of the flange (3A or 3B) from the recess start end 163 to the recess end end 164, but it is not limited to such a form. . At least part of the bottom of the guide recess may be arranged at a position offset in the axial direction with respect to the inner surface 3S of the flange (3A or 3B).

In the modified example of FIG. 19, as described above, in each guide recess, the outer end of the starting end and the outer end of the intermediate portion are smoothly connected by a spline curve, and the outer end of the intermediate portion and the outer end of the terminal end are smoothly connected by a spline curve. , but the same is applicable to the embodiments shown in FIGS. 12 and 13 . Specifically, in the guide region of the flange shown in each of FIGS. 12 and 13, each guide recess corresponds to the inner end of the top 150 of the rope guide adjacent radially outwardly to that guide recess. an intermediate portion outer end that is an outer end at a position, a starting end side outer end that is a radially outer end at a recess starting end 163 of the guide recess, and a radially outer end at a recess terminal end 164 of the guide recess. and a terminating outer edge, which is an edge. 12 and 13, in each guide recess, the outer end of the starting end and the outer end of the intermediate portion may be smoothly connected by a spline curve. It may be smoothly connected to the lateral outer end by a spline curve. Also, in the flanges shown in FIGS. 12, 13 and 19, the curve connecting the outer end of the starting end and the outer end of the intermediate portion and the curve connecting the outer end of the intermediate portion and the outer end of the terminal end are spline curves. For example, it may be a curve such as a Bezier curve or a curve obtained by Lagrangian interpolation.

As described above, according to the present disclosure, even if the load on the rope during rope winding is small or the flexibility of the rope is low, the winding state of the rope is disturbed on the winding drum during rope winding. A winch drum is provided that can suppress the

In this winch drum, the recess start end of the guide recess is located closer to the guide start end than the top of the rope guide, and the recess end is located closer to the guide end of the rope guide than the top of the rope guide. Therefore, the guide recess can accommodate a part of the rope portion of the last row in a specific layer from a relatively early stage when the rope portion of the last row reaches the guide area during rope winding, and moreover, A part of the rope portion of the last row can continue to be accommodated until reaching the end of the recess which is located closer to the end of the guide than the top of the guide and bypass the top. This means that even if the load on the rope during rope winding is small or the flexibility of the rope is low, the rope portion of the last row in a particular layer will be the same as the rope portion of the row one row before the last row. It is possible to suppress the occurrence of an event in which it does not enter the gap with the flange. As a result, disturbance of the winding state of the rope on the winding drum during rope winding is suppressed.

It is preferable that the radial dimension of the guide recess at the recess starting end is larger than the radial dimension of the guide recess at the recess terminal end. When the load on the rope is small when the rope is wound or when the flexibility of the rope is low, the ideal dimension is the distance in the axial direction between the rope portion in the row immediately before the last row in the specific layer and the flange. In addition to being less than , the radial position of the last row of rope sections may deviate radially from the ideal position. Such an event is particularly likely to occur at a relatively early stage when the rope portion of the last row in a particular layer reaches the guide area during rope winding. In this configuration, the radial dimension of the guide recess at the recess start end is set relatively larger than the radial dimension of the guide recess at the recess end end. Even if the position deviates from the ideal position in the radial direction, part of the rope portion in the final row is likely to enter the guide recess from the starting end of the recess.

The starting end-side outer end, which is the radially outer end of the guide recess at the recess starting end, is radially wider than the terminal end-side outer end, which is the radially outer end of the guide recess at the recess terminal end. It is preferably located on the outside. The radial position of the last row of rope portions as described above is particularly susceptible to radial displacement outward. In this configuration, the radial dimension of the guide recess at the recess start end is larger than the radial dimension of the guide recess at the recess end end, and the start end side outer end of the recess start end is larger than the terminal end side outer end of the recess end end. Since it is positioned radially outward, even if the radial position of the last row rope portion deviates radially outward from the ideal position, the position of the last row rope portion It becomes easier for a part to enter the guide recess from the starting end of the recess.

When the apex of the rope guide has a shape extending linearly, and the intersection of the apex imaginary line, which is a virtual line extending the apex toward the winding drum, and the winding drum is defined as the inner end of the apex In the above, it is preferable that the top imaginary line is formed in a posture that is inclined in the direction opposite to the winding rotation direction with respect to a reference line that is a straight line passing through the rotation axis and the top inner end. . In this configuration, the position where the rope portion of the first row of the specific upper layer faces the top of the rope guide can be shifted to the opposite side of the winding rotation direction. As a result, even if the diameter of the rope is smaller than the ideal size, the rope can be wound up in an orderly manner.

It is preferable that the rope guide has a shape such that, when the rope guide is viewed in the axial direction, the distance in the circumferential direction between the top portion and the end of the guide increases toward the outer portion in the radial direction. . In this configuration, the circumferential distance between the apex and the end of the guide increases with increasing layer. Therefore, the higher the layer, the thicker the rope guide can be provided at the position shifted from the reference line to the opposite side in the winding rotation direction. The thickness thus imparted makes it easier for the first row rope portion of the particular upper layer to climb over the last row rope portion of the particular layer.

Claims

A winch drum rotatable around a rotation axis in the winding rotation direction, which is the rotation direction in which the rope is wound,
The rope is wound so that a plurality of rope portions forming part of the rope are arranged in a plurality of rows along the axial direction, which is the direction of the rotation axis, and arranged in a plurality of layers along the radial direction of the winch drum. a winding drum;
A first flange and a second flange projecting outward in the radial direction from both ends of the winding drum in the axial direction,
Each of the first flange and the second flange is in a specific upper layer that is one layer above the specific layer with respect to the rope portion of the last row in the specific layer that is at least one layer of the plurality of layers a guide region, the region containing a rope guide for guiding said first row of rope portions so that said first row of rope portions intersect, said rope guide of said first flange being located on an inner surface of said first flange; and the rope guide of the second flange is shaped to protrude from the inner surface of the second flange toward the first flange,
Each of the rope guides of the first flange and the second flange is a guide starting end located at the boundary with the inner surface, and the rope of the first row is wound on the winch drum during rope winding when the rope is wound on the winch drum. A guide start end, which is a first adjacent part of the rope guide, and a guide end position, which is located on the boundary with the inner surface, and the rope part of the first row is the rope guide at the time of winding the rope. and a guide end that is the last adjacent portion, and a top that is located between the guide start and the guide end and that is the tip of the rope guide in the projecting direction,
The guide area is a concave portion in the specific layer corresponding to the rope portion of the last row, and the rope guide allows a part of the rope portion of the last row to enter when the rope is wound. further comprising a guide recess having a shape recessed in the axial direction from
The guide recess has a recess start end, which is a portion of the guide recess first adjacent to the rope portion of the last row in the specific layer when the rope is wound, and a rope portion of the last row of the guide recess. and a recess end that is a last adjacent portion, wherein the recess start is located closer to the guide start of the rope guide than the top of the rope guide, and the recess end is positioned closer to the rope guide winch drum closer to the guide end of the rope guide than to the top of the winch drum.
A winch drum according to claim 1,
The winch drum, wherein the radial dimension of the guide recess at the recess starting end is larger than the radial dimension of the guide recess at the recess terminal end.
A winch drum according to claim 2,
The starting end-side outer end, which is the radially outer end of the guide recess at the recess starting end, is radially wider than the terminal end-side outer end, which is the radially outer end of the guide recess at the recess terminal end. The winch drum, located outside.
The winch drum according to any one of claims 1 to 3,
The top of the rope guide has a shape extending linearly,
In the case where the intersection of the top virtual line, which is a virtual line extending the top toward the winding drum, and the winding drum is defined as the top inner end, the top virtual line is the top inner end. A winch drum that is formed in a posture that is inclined in a direction opposite to the winding rotation direction with respect to a reference line that is a straight line passing through.
A winch drum according to claim 4,
The winch drum has a shape such that, when the rope guide is viewed in the axial direction, the distance between the top portion and the end of the guide in the circumferential direction increases toward the outer portion in the radial direction. .