JP7069806B2 - Winch drum and crane equipped with it - Google Patents

Description

The present invention relates to a winch drum for winding a rope used for a crane or the like.

Conventionally, a winch drum for winding a rope used for a crane or the like is known. The winch drum includes a winding cylinder in which a rope (wire rope) is wound in multiple layers, and a pair of flanges provided at both ends in the width direction of the winding cylinder. In this winch drum, the ropes are sequentially wound around the outer peripheral surface of the winding cylinder from the first row to the last row of the first layer, and the ropes of the second layer and higher layers are sequentially wound on the ropes of the lower layer. In the winch drum, the number of rows of ropes wound around each layer is preset.

By the way, since the diameter of the rope has a tolerance, it may vary within the tolerance. The diameter of the rope also varies slightly depending on the mass of the suspended load suspended from the crane. In addition, the diameter of the rope wears and gradually decreases with long-term use of the rope. Further, since the winch drum, which is often manufactured by casting, cannot be said to have high dimensional accuracy, the distance between the pair of flanges in the winch drum has a relatively large variation.

Therefore, when a gap is formed between the ropes wound on the winch drum due to the above-mentioned variation, the rope wound on the layer falls into the gap formed on the lower layer. The rope is in a state of random winding. Further, if the rope does not enter the layer before reaching the preset number of rows due to the above-mentioned variation, the rope is also in a state of random winding.

For example, Patent Documents 1 and 2 disclose a technique for preventing the above-mentioned random winding. In Patent Document 1, in a spiral guide groove in which parallel grooves and inclined grooves are alternately provided at two locations on the outer peripheral surface of the winding cylinder, a protrusion is formed on the inner wall surface of the flange of one inclined groove section and the other. A rope winding drum having a recess formed on the inner wall surface of the flange of the inclined groove section is disclosed. Patent Document 2 is configured so that a flat plate-shaped adjuster can be detachably attached to the inner wall surface of the flange via a mounting hole, and the width of the winding drum can be changed by changing the plate thickness of the adjuster. The wire rope take-up drum is disclosed.

Japanese Unexamined Patent Publication No. 7-215683 Jitsukaisho 58-67890 Gazette

However, in the rope winding drum of Patent Document 1, the depth of the recess formed on the inner wall surface of the flange is set in advance, so that it depends on the variation in the diameter of the rope and the variation in the distance between the flanges. It cannot be adjusted.

Further, in the wire rope winding drum of Patent Document 2, the width of the winding drum can be changed by changing the plate thickness of the flat plate-shaped adjuster attached to the inner wall surface of the flange, but the number of adjusters that can be actually prepared is finite. There is a certain amount of limitation. Therefore, in the wire rope winding drum of Patent Document 2, the width of the winding drum cannot be continuously finely adjusted even if it can be adjusted stepwise.

The present invention has been made in view of the above problems, and even if there are variations in the diameter of the rope and variations in the distance between the flanges, the random winding of the rope can be caused by continuously finely adjusting the distance between the flanges. It is an object of the present invention to provide a winch drum capable of suppressing the occurrence and a crane equipped with the winch drum.

(1) The winch drum of the present invention is a drum body including a winding drum around which a rope is wound, and a first flange provided at one end of the winding cylinder in the width direction, and has the width of the rope. It has an inner surface facing in the direction and an outer surface on the opposite side thereof, and is configured to be displaceable in the width direction with respect to the drum body, and is provided at the other end of the winding cylinder in the width direction. A second flange and a regulating member including a bolt are provided. The bolt has a head and a shaft portion extending from the inner surface of the head and having a male screw formed on an outer peripheral surface, and the male screw is screwed into a female screw provided on the drum body. The restricting member is located on the outer side in the width direction with respect to the regulated surface formed by a part of the outer surface of the first flange, and by hitting the regulated surface, the outer side of the first flange in the width direction. It has a regulatory surface that regulates the displacement to. In the restricting member, the restricting surface is displaced inward in the width direction by rotating the bolt in the tightening direction, while the restricting surface is displaced in the width direction by rotating the bolt in the direction opposite to the tightening direction. It is configured to be displaced outwards.

In the winch drum of the present invention, the regulated surface regulates the lateral displacement of the first flange by hitting the regulated surface, whereby the maximum position where the first flange can be displaced outward in the width direction (the maximum position where the first flange can be displaced outward in the width direction (). Maximum allowable position) can be determined. That is, the regulation surface can determine the maximum allowable value of the distance between the inner surface of the first flange and the inner surface of the second flange (distance between flanges). Then, when the regulation surface is displaced inward in the width direction by rotating the bolt of the regulation member in the tightening direction, the maximum allowable value of the distance between the flanges can be reduced according to the displacement amount. Further, when the regulation surface is displaced outward in the width direction by rotating the bolt of the regulation member in the direction opposite to the tightening direction, the maximum allowable value of the distance between the flanges can be increased according to the displacement amount. That is, in the present invention, the maximum allowable value of the distance between the flanges can be continuously changed according to the amount of rotation of the bolt. Therefore, in the present invention, the distance between the flanges is continuously changed to make the distance between the flanges finer according to the variation in the diameter of the rope and the magnitude of the variation in the distance between the flanges due to the dimensional accuracy of casting. Can be adjusted. As a result, the upper layer rope falls into the gap formed between the ropes wound around the winch drum, causing the rope to be in a state of random winding, and the rope is moved before the specified number of rows is reached. It is possible to prevent the rope from being in a state of random winding due to the fact that it does not enter the layer.

(2) In the winch drum, the first flange is a flange main body that includes a facing wall portion facing the outer surface of the winding cylinder, and extending outward in the radial direction from the facing wall portion to the inner surface of the winding cylinder. The facing wall portion has a through hole penetrating in the width direction, and the winding cylinder is drilled inward in the width direction on the outer surface of the winding cylinder and is provided with the female screw. The shaft portion of the bolt is inserted into the through hole of the facing wall portion, and the male screw of the shaft portion is screwed into the female screw of the screw hole of the winding cylinder. The regulated surface is composed of at least a part of the outer surface of the facing wall portion, and the inner surface of the head of the bolt is lateral to the regulated surface in the width direction with respect to the regulated surface. They may face each other in the width direction.

In this aspect, the regulated surface is composed of at least a part of the outer surface of the facing wall portion. Then, the inner surface of the head of the bolt facing the regulated surface in the width direction can be used as the regulating surface. Further, when another member such as a washer is interposed between the head of the bolt and the facing wall portion, that is, the inner surface of the head of the bolt is with respect to the regulated surface via another member such as a washer. When facing each other in the width direction, the inner surface of another member such as a washer can be used as a regulating surface. Specifically, when the head of the bolt is rotated, the shaft portion of the bolt screwed into the screw hole of the winding cylinder enters or retracts into the screw hole, so that the head of the bolt constituting the regulation surface is formed. The inner surface of the head and the inner surface of other members such as washers constituting the regulation surface are displaced in the width direction. The maximum allowable position outside the width direction of the first flange is determined according to the displacement of the regulation surface, thereby determining the maximum allowable value of the distance between the flanges.

Further, in this aspect, the inner surface of the head of the bolt is located outside the regulated surface formed by at least a part of the outer surface of the facing wall portion of the first flange in the width direction. That is, the bolt is arranged so that its head is located outside the regulated surface in the width direction. Therefore, in this aspect, it is not necessary to provide a recess for accommodating the head of the bolt on the inner surface of the flange, for example, as disclosed in FIGS. 3 and 5 of Patent Document 2. If a recess for accommodating the head of the bolt is provided on the inner surface of the flange, the rope will come into contact with the edge of the recess when the rope is wound around the winding cylinder or when the rope is unwound from the winding cylinder, and the rope will wear. May progress. In this aspect, it is possible to prevent such rope wear from occurring.

Further, in this embodiment, since the head of the bolt is located outside the regulated surface in the width direction, the work of adjusting the distance between the flanges can be performed from the outside in the width direction of the winch drum.

(3) In the winch drum, the drum body further includes an opposing member fixed to the winding cylinder in a state of facing the outer surface of the winding cylinder and the outer surface of the first flange, and the opposing member includes the facing member. The male screw on the shaft portion of the bolt is screwed into the female screw in the screw hole of the facing member so as to have a screw hole penetrating in the width direction and provided with the female screw. The tip surface of the shaft portion may face the regulated surface in the width direction outside the regulated surface in the width direction.

In this aspect, the tip surface of the shaft portion of the bolt facing the regulated surface in the width direction outside the regulated surface in the width direction can be used as the regulated surface. Specifically, when the head of the bolt is rotated, the shaft portion of the bolt screwed into the screw hole of the facing member is displaced in the width direction with respect to the screw hole. The tip surface of the shaft is displaced in the width direction. The maximum allowable position outside the width direction of the first flange is determined according to the displacement of the regulation surface, thereby determining the maximum allowable value of the distance between the flanges.

(4) In the winch drum, the winding cylinder has a tubular portion having an outer peripheral surface on which the rope is wound, and a flange portion extending radially outward from the widthwise one end portion of the tubular portion. The outer peripheral surface of the cylinder portion of the winding cylinder has a guide groove for guiding the rope of the first layer to be wound around the outer peripheral surface, and the flange portion of the winding cylinder is the first. The low-rise rope including one layer has an inner surface facing the width direction, and the inner side surface of the first flange faces the high-rise rope having a larger number of layers than the lower layer in the width direction. It is provided at the position.

In this aspect, the entire flange is composed of the first flange and the flange portion which is a part of the winding cylinder. An inner surface of the flange portion of the winding drum is provided at a position where the low-rise rope including the first layer faces in the width direction, and the inner surface of the first flange is a high-rise rope having a larger number of layers than the lower layer. Are provided at positions facing each other in the width direction. Therefore, in this aspect, the distance between the flanges can be continuously changed to finely adjust the distance between the flanges at the position corresponding to the high-rise rope. The reasons for adopting such a configuration are as follows.

In a winch drum in which a guide groove for guiding the rope of the first layer is provided on the outer peripheral surface of the winding drum, the rope of the first layer enters the guide groove to form a first row to the final row of the first layer. It is wound up in an orderly manner. Therefore, in this type of winch drum, in the first layer, the rope is wound in an orderly manner without adjusting the distance between the flanges. Rather, if the flange is displaced in the width direction at a position corresponding to the rope of the first layer, the advantage of providing the guide groove may be impaired. Further, when the winch drum is manufactured by casting, the dimensional accuracy of the winch drum tends to decrease toward the outer side in the radial direction. Therefore, in the high-rise building, there is likely to be a problem that a gap is formed between the ropes wound around the winch drum, and a problem that the rope does not enter the layer before the specified number of rows is reached. That is, in the low layer including the first layer, it is less necessary to adjust the distance between the flanges than in the high layer having a larger number of layers than the lower layer.

From the above, in this embodiment, by providing the inner side surface of the first flange at a position corresponding to the high layer, the distance between the flanges can be adjusted at the position corresponding to the high layer, but such adjustment is unnecessary. The inner surface of the flange portion of the winding cylinder is provided at a position corresponding to the lower layer where it is preferable not to make such an adjustment.

(5) The crane of the present invention includes a lower traveling body and an upper rotating body that is rotatably arranged on the lower traveling body, and the winch drum is mounted on the upper rotating body. ..

In the crane of the present invention, the distance between the flanges can be continuously changed and the distance between the flanges can be finely adjusted according to the magnitude of the variation in the diameter of the rope and the variation in the distance between the flanges. As a result, the upper layer rope falls into the gap formed between the ropes wound around the winch drum, causing the rope to be in a state of random winding, and the rope is moved before the specified number of rows is reached. It is possible to prevent the rope from being in a state of random winding due to the fact that it does not enter the layer.

According to the present invention, the distance between the flanges can be continuously changed and the distance between the flanges can be finely adjusted according to the magnitude of the variation in the diameter of the rope and the variation in the distance between the flanges. As a result, the upper layer rope falls into the gap formed between the ropes wound around the winch drum, causing the rope to be in a state of random winding, and the rope is moved before the specified number of rows is reached. It is possible to prevent the rope from being in a state of random winding due to the fact that it does not enter the layer.

It is a side view which shows the crane which concerns on embodiment of this invention. It is a perspective view which shows the outline of the winch drum which concerns on embodiment of this invention. It is sectional drawing which shows the winch drum which concerns on 1st Embodiment of this invention. It is an enlarged cross-sectional view of a part of FIG. 3, and is the cross-sectional view which shows the mechanism which adjusts the position of the 1st flange in the winch drum which concerns on 1st Embodiment. It is a side view which shows the winch drum which concerns on 1st Embodiment. It is a development view of the winch drum for demonstrating the arrangement of the guide groove provided on the outer peripheral surface of the winding cylinder of the winch drum which concerns on 1st Embodiment. It is sectional drawing which shows the stopper mechanism which regulates the displacement of the 1st flange inward in the width direction with respect to the winding cylinder in the winch drum which concerns on 1st Embodiment. It is sectional drawing which shows the mechanism which adjusts the position of the 1st flange in the winch drum which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows the mechanism which adjusts the position of the 1st flange in the winch drum which concerns on 3rd form . It is sectional drawing which shows the mechanism which adjusts the position of the 1st flange in the winch drum which concerns on 4th form .

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

[crane]
FIG. 1 is a side view showing an outline of a crane 100 according to an embodiment of the present invention. As shown in FIG. 1, the crane 100 includes a self-propellable lower traveling body 101 and an upper turning body 102 arranged on the lower traveling body 101.

The upper swivel body 102 includes a swivel frame 103 mounted on the lower traveling body 101 so as to be able to swivel around the vertical axis, and a boom 104 mounted on the front portion of the swivel frame 103 so as to be able to undulate. A hook 105 suspended from the tip of the boom 104 via a rope R (wire rope) and a winch device 107 are provided.

The winch device 107 is a device that causes the hook 105 to perform an elevating operation for hanging work by winding or feeding out the rope R 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. The position of the winch device 107 is, for example, behind the attachment portion of the boom 104 in the swivel frame 103.

FIG. 2 is a perspective view showing an outline of the winch drum 1 according to the embodiment of the present invention. As shown in FIG. 2, the winch drum 1 is rotated around the rotation axis K by the drive source for winding or unwinding the rope R. The winch drum 1 is supported by the swivel frame 103 so that the vehicle width direction of the crane 100 and the rotation axis K coincide with each other.

The rope R is pulled out from the winding cylinder 2 and passes through the tip of the boom 104, and is hung from the tip of the boom 104 to hang the hook 105. The winch drum 1 winds the rope R around the winding cylinder 2 by rotating in the winding rotation direction D1, which is one of the rotation directions around the rotation axis K, thereby raising the hook 105. Further, the winch drum 1 unwinds the rope R by rotating in the opposite direction D2 (feeding rotation direction D2) of the winding rotation direction D1, thereby lowering the hook 105.

Hereinafter, the winch drum 1 according to the first to second embodiments and the third to fourth embodiments of the present invention will be described in detail.

[First Embodiment]
FIG. 3 is a cross-sectional view showing a winch drum 1 according to the first embodiment of the present invention. FIG. 4 is an enlarged view of a part of FIG. 3, and is a cross-sectional view showing a mechanism for adjusting the position of the first flange 3A in the winch drum 1 according to the first embodiment. FIG. 5 is a side view showing the winch drum 1 according to the first embodiment, and is a view when the winch drum 1 is viewed in the axial direction of the rotation axis K.

As shown in FIG. 3, the winch drum 1 has a drum body 11 including a winding body 2 in which a rope R is wound in multiple layers, and a width direction W (axial direction of the rotation axis K of the winch drum 1) in the winding body 2. It includes a first flange 3A provided at one end, a second flange 3B provided at the other end of the winding drum 2 in the width direction W, and a regulating member 10. In the first embodiment, the drum body 11 is composed of a winding body 2.

As shown in FIGS. 3 and 4, the winding cylinder 2 has a tubular portion 21 having an outer peripheral surface 211 on which the rope R is wound, and one end portion of the tubular portion 21 in the width direction W to the outside in the radial direction of the tubular portion 21. It has a flange portion 22 that expands. The tubular portion 21 is a portion having a cylindrical shape centered on the rotation axis K, and the flange portion 22 is a portion of the one end portion of the tubular portion 21 adjacent to the radial outer side of the tubular portion 21. The flange portion 22 has a shape that extends radially outward from the one end portion of the tubular portion 21 in an annular shape. Side plates 26 are provided at both ends of the tubular portion 21 in the width direction W. Each side plate 26 is provided with a shaft 27 centered on the rotation shaft K.

The flange portion 22 of the winding cylinder 2 is configured so as not to be displaced with respect to the winding cylinder 2. Specifically, since the flange portion 22 of the winding cylinder 2 is integrally molded with the cylinder portion 21 of the winding cylinder 2 by using a manufacturing method such as casting, the position with respect to the cylinder portion 21 is fixed. The flange portion 22 of the winding cylinder 2 has an inner side surface 221 in which a low-layer rope R composed of a first layer L1 and a second layer L2 faces the width direction W.

As shown in FIGS. 3 and 5, the first flange 3A has an annular shape centered on the rotation axis K. As shown in FIGS. 3 and 4, the first flange 3A is provided at a position adjacent to the flange portion 22 of the winding cylinder 2. The first flange 3A is configured to be displaceable in the width direction W with respect to the flange portion 22 of the winding cylinder 2. Specifically, the first flange 3A is formed as a separate body from the winding cylinder 2 by using a manufacturing method such as casting, and is configured to be displaceable with respect to the winding cylinder 2 by a position adjusting mechanism described later. To.

The first flange 3A has an inner side surface 321 on which the rope R faces the width direction W. The inner side surface 321 of the first flange 3A is provided at a position where the rope R of a high layer (in this embodiment, a layer of the third layer or more) having a larger number of layers than the lower layer faces the width direction W.

As shown in FIG. 4, the first flange 3A has a facing wall portion 31 and a flange main body 32. The facing wall portion 31 is provided at a position facing the outer surface 222 of the flange portion 22, which is the outer surface of the winding cylinder 2, in the width direction W. The facing wall portion 31 of the first flange 3A is located on the outer side W2 in the width direction with respect to the flange portion 22 of the winding cylinder 2. The facing wall portion 31 has a shape that extends in an annular shape in the radial direction from the end portion of the outer W2 in the width direction of the flange main body 32.

A gap in the width direction W is formed between the inner side surface 311 of the facing wall portion 31 and the outer surface 222 of the flange portion 22 of the winding cylinder 2, and the first flange 3A is provided within the range of the size of the gap. It can be displaced inward W1 in the width direction. Further, the first flange 3A is set in the width direction within the range of the width direction W of the portion where the male screw 63 of the shaft portion 62 of the bolt 6 and the female screw 24 of the screw hole 23 of the winding cylinder 2 are screwed together. It can be displaced to the outer W2.

The flange body 32 is a portion of the first flange 3A including the inner side surface 321 of the first flange 3A. The flange body 32 of the first flange 3A is provided at a position adjacent to the flange portion 22 of the winding cylinder 2 on the outer side in the radial direction. The flange body 32 has a shape that extends radially outward in an annular shape on the radial outer side of the flange portion 22 of the winding cylinder 2.

Therefore, in the first embodiment, the entire flange is composed of the first flange 3A and the flange portion 22 which is a part of the winding cylinder 2.

The second flange 3B has an annular shape centered on the rotation axis K. The second flange 3B is configured so as not to be displaced with respect to the winding cylinder 2. Since the second flange 3B is integrally molded with the winding cylinder 2 by using a manufacturing method such as casting, the position with respect to the winding cylinder 2 is fixed. As shown in FIG. 3, the second flange 3B has an inner side surface 323 on which the rope R faces the width direction W. The second flange 3B is provided at a position where the ropes R of the first layer L1 and above, that is, the ropes R of all the layers face each other in the width direction W.

The regulating member 10 is provided to displace the first flange 3A with respect to the winding cylinder 2 in the width direction W. The regulating member 10 includes a plurality of bolts 6 and a plurality of washers 66.

The plurality of bolts 6 (12 bolts 6 in the specific example shown in FIG. 5) are arranged so as to be spaced apart from each other along the circumferential direction of the annular first flange 3A. As shown in FIG. 4, each bolt 6 has a head portion 61 and a shaft portion 62 extending from the inner surface 64 of the head portion 61 and having a male screw 63 formed on the outer surface thereof. The inner surface 64 of the head portion 61 of each bolt 6 faces the inner side W1 in the width direction. The inner surface 64 of the head portion 61 of each bolt 6 is located in the width direction W via a washer 66 with respect to the outer surface of the first flange 3A (specifically, the outer surface 312 of the facing wall portion 31 of the first flange 3A). Facing.

A washer 66 is inserted through the shaft portion 62 of each bolt 6. Each washer 66 has an inner surface 67 facing the inner side W1 in the width direction. The inner surface 67 of each washer 66 faces the outer surface of the first flange 3A (specifically, the outer surface 312 of the facing wall portion 31 of the first flange 3A) in the width direction W. The inner surface 67 of each washer 66 constitutes the regulation surface S1 described later. When no other member such as a washer 66 is interposed between the head portion 61 of the bolt 6 and the facing wall portion 31 of the first flange 3A, the regulation surface S1 is the head portion 61 of the bolt 6. It is composed of an inner surface 64.

FIG. 6 is a developed view of the winch drum 1 for explaining the arrangement of the guide groove 4 provided on the outer peripheral surface 211 of the winding body 2 of the winch drum 1 according to the first embodiment.

As shown in FIGS. 3, 4 and 6, the winch drum 1 according to the first embodiment is a so-called rebus type winch drum. In the rebus type winch drum 1, the guide groove 4 is provided on the outer peripheral surface 211 of the winding cylinder 2. The rope R of the first layer L1 is taken up in an orderly manner by entering the guide groove 4. FIG. 4 illustrates a state in which the rope R is wound from the first layer L1 to the fifth layer L5.

As shown in FIG. 6, the guide groove 4 is provided in the parallel guide groove 4 provided in the first parallel portion P1, the inclined guide groove 4 provided in the first intersection C1, and the second parallel portion P2. The parallel guide groove 4 and the inclined guide groove 4 provided at the second intersection C2 are included. The first parallel portion P1, the first intersection C1, the second parallel portion P2, and the second intersection C2 are arranged in this order in the circumferential direction on the outer peripheral surface 211 of the winding cylinder 2.

The parallel guide groove 4 of the first parallel portion P1 and the parallel guide groove 4 of the second parallel portion P2 are grooves parallel to the circumferential direction of the outer peripheral surface 211 of the winding cylinder 2. The inclined guide groove 4 at the first intersection C1 and the inclined guide groove 4 at the second intersection C2 are grooves inclined with respect to the circumferential direction of the outer peripheral surface 211 of the winding cylinder 2. The inclined guide grooves 4 of these intersections C1 and C2 are inclined in the same direction.

Specifically, the inclined guide groove 4 at the first intersection C1 is located at the position of the rope R because the rope R of the first layer L1 enters the inclined guide groove 4 when the rope R is wound around the winding cylinder 2. Is moved to the second flange 3B side by 1/2 pitch (approximately the radius of the rope R). Similarly, the inclined guide groove 4 at the second intersection C2 determines the position of the rope R by allowing the rope R of the first layer L1 to enter the inclined guide groove 4 when the rope R is wound around the winding cylinder 2. Move it to the 2nd flange 3B side by 1/2 pitch (approximately the radius of the rope R). Therefore, when the rope R goes around the winding cylinder 2, the position of the rope R moves to the second flange 3B side by one pitch (approximately the diameter of the rope R).

Further, the final row 4E at the second intersection C2 is configured so that the width of the guide 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 guide groove 4 of the final row 4E of the first layer L1 does not enter the guide groove 4 of the final row 4E as the winding progresses, and is pushed up to the first row of the second layer L2.

In the first parallel portion P1 and the second parallel portion P1, as shown in FIG. 4, the upper rope R (for example, the rope R of the third layer L3) is in the lower layer (for example, the second layer L2) and is adjacent to each other. It is arranged parallel to the two matching ropes R and is located directly above the valley formed by these lower ropes R. That is, in the first parallel portion P1 and the second parallel portion P2, the rope R in the upper layer is located at a position shifted by 1/2 pitch with respect to the rope R in the lower layer immediately below the rope R.

On the other hand, in the first intersection C1, the upper rope is arranged so as to intersect the lower rope when viewed in a plan view. Similarly, at the second intersection C2, the upper rope is arranged so as to intersect the lower rope when viewed in a plan view.

In the specific example shown in FIG. 6, the first parallel portion P1 is provided in a region occupying 1/3 of the outer peripheral surface 211 of the winding cylinder 2 in the circumferential direction. The second parallel portion P2 is provided in a region that occupies another one-third of the outer peripheral surface 211 of the winding cylinder 2 in the circumferential direction. The first intersection C1 is provided in a region occupying 1/6 of the outer peripheral surface 211 of the winding cylinder 2 in the circumferential direction. The second intersection C2 is provided in a region occupying another 1/6 of the outer peripheral surface 211 of the winding cylinder 2 in the circumferential direction. In this case, in the cross section perpendicular to the rotation axis K on the outer peripheral surface 211 of the winding cylinder 2, the central angle connecting both ends of the first parallel portion P1 in the circumferential direction and the rotation axis K is 120 degrees, and the second parallel portion P2. The central angle connecting both ends in the circumferential direction and the rotation axis K is 120 degrees. Further, the central angle connecting both ends of the first intersection C1 in the circumferential direction and the rotation axis K is 60 degrees, and the central angle connecting both ends of the second intersection C2 in the circumferential direction and the rotation axis K is 60 degrees. be.

However, the range in which the parallel portions P1 and P2 and the intersecting portions C1 and C2 are provided is not limited to the above specific example. As an example, in the cross section of the outer peripheral surface 211 of the winding cylinder 2 perpendicular to the rotation axis K, the central angle connecting both ends of the first parallel portion P1 in the circumferential direction and the rotation axis K is set to 105 degrees, and the second parallel portion The central angle connecting both ends of P2 in the circumferential direction and the rotation axis K is 105 degrees, the central angle connecting both ends of the first intersection C1 in the circumferential direction and the rotation axis K is 75 degrees, and the second intersection C2. The central angle connecting both ends in the circumferential direction and the rotation axis K can be set to 75 degrees.

As shown in FIG. 6, in the winch drum 1, a rope guide portion 5 called a rope kick is provided on the inner side surface 321 of the first flange 3A so as to project toward the second flange 3B. A similar rope guide portion 5 is provided on the inner side surface 323 of the second flange 3B so as to project toward the first flange 3A. The cross section of each rope guide portion 5 has a triangular shape. The functions of the rope guide unit 5 are as follows. For example, the rope R in the first row of the second layer L2 is guided by the rope guide portion 5 from a position closer to the flange than the rope R in the last row of the first layer L1 and is guided by the rope in the last row of the first layer L1. By moving directly above R and further being guided by the rope guide portion 5, it moves directly above the valley formed by the rope R in the final row of the first layer and the rope R adjacent thereto. As a result, the rope R of the second layer is wound up in an orderly manner. These rope guide portions 5 are provided only in the first intersection portion C1, and are not provided in the second intersection portion C2, the first parallel portion P1, and the second parallel portion P2.

As described above, in the first embodiment, the entire flange is composed of the first flange 3A and the flange portion 22 which is a part of the winding cylinder 2. The reasons for adopting such a configuration are as follows.

As shown in FIGS. 3 and 4, in the winch drum 1 in which the guide groove 4 for guiding the rope R of the first layer L1 is provided on the outer peripheral surface 211 of the winding cylinder 2, the rope R of the first layer L1 is By entering the guide groove 4, the first layer L1 is wound up in an orderly manner from the first row to the last row. Further, in the winch drum 1, a recess 40 (see FIG. 3) for guiding the rope R of these rows is adjacent to the inner side surface 323 of the flange at a portion corresponding to the first row and the final row of the second layer L2. It is provided. Therefore, in the winch drum 1, in the first layer L1 and the second layer L2, the rope R is wound in an orderly manner without adjusting the distance between the pair of flanges 3A and 3B provided at both ends in the width direction W. Taken. Further, when the winch drum 1 is manufactured by casting, the dimensional accuracy of the winch drum 1 tends to decrease toward the outer side in the radial direction. Therefore, in the higher layer of the third layer L3 or higher, there is a problem that a gap is formed between the ropes R wound around the winch drum 1, and the ropes R cannot enter the layer before the specified number of rows is reached. Is likely to occur. On the other hand, in the low layer including the first layer L1 and the second layer L2, it is less necessary to adjust the distance between the pair of flanges 3A and 3B than in the high layer of the third layer L3 and above.

From the above, in the first embodiment, the inner side surface 321 of the first flange 3A configured to be displaceable in the width direction W with respect to the flange portion 22 of the winding cylinder 2 is provided at a position corresponding to the high layer. Therefore, the distance between the pair of flanges 3A and 3B can be adjusted at the position corresponding to the high layer. On the other hand, the inner side surface 221 of the flange portion 22 of the winding cylinder 2 is provided at a position corresponding to the lower layer where such adjustment is unnecessary and it is preferable not to make such adjustment.

Next, a mechanism (position adjusting mechanism) for adjusting the position of the first flange 3A on the winch drum 1 will be specifically described with reference to FIG.

In the first embodiment, as described above, the inner surface 67 of each washer 66 constitutes the regulation surface S1 in the position adjusting mechanism, and a part of the outer surface 312 of the facing wall portion 31 of the first flange 3A is formed. , The regulated surface S2 in the position adjusting mechanism, that is, the regulated surface S2 pressed by the regulated surface S1.

In the position adjusting mechanism, by rotating a plurality of bolts 6 in the tightening direction, the regulated surface S1 (inner surface 67 of the washer 66) becomes one of the regulated surfaces S2 (outer surface 312 of the facing wall portion 31 of the first flange 3A). Part) is pressed to displace the first flange 3A inward W1 in the width direction with respect to the winding cylinder 2. On the other hand, by rotating the plurality of bolts 6 in the directions opposite to the tightening direction, the first flange 3A is allowed to be displaced to the outer side W2 in the width direction with respect to the winding cylinder 2. That is, the position adjusting mechanism shown in FIG. 4 adjusts the position of the first flange 3A in the width direction W with respect to the winding cylinder 2. At the position adjusted by this, the first flange 3A is restricted from being displaced to the outer side W2 in the width direction with respect to the winding cylinder 2. That is, the position adjusting mechanism shown in FIG. 4 defines the maximum allowable value of the distance between the pair of flanges 3A and 3B.

The facing wall portion 31 of the first flange 3A has a plurality of through holes 313 that penetrate the facing wall portion 31 in the width direction W. The plurality of through holes 313 are formed at positions corresponding to the plurality of bolts 6 shown in FIG. No female screw is provided in each through hole 313.

The flange portion 22 of the winding cylinder 2 has a plurality of screw holes 23 drilled in the width direction W from the outer surface 222 thereof. A female screw 24 is formed on the inner surface of each screw hole 23. The plurality of screw holes 23 are formed at positions corresponding to the plurality of bolts 6 shown in FIG. 5, that is, positions corresponding to the plurality of through holes 313. As shown in FIG. 4, each screw hole 23 is a hole drilled in the flange portion 22 of the winding cylinder 2 from the outer surface 222 to the inner side W1 in the width direction halfway through the thickness of the flange portion 22. That is, each screw hole 23 is not a through hole that penetrates the flange portion 22. Each screw hole 23 is open only to the outer surface 222 of the flange portion 22, and is not open to the inner side surface 221 of the flange portion 22. Therefore, the inner side surface 221 of the flange portion 22 is composed of continuous surfaces.

The head portion 61 of each bolt 6 is located on the outer side W2 in the width direction of the facing wall portion 31, the shaft portion 62 is inserted into the through hole 313 of the facing wall portion 31, and the male screw 63 of the shaft portion 62 is a screw hole. It is arranged in a state of being screwed into the female screw 24 of 23. As described above, a washer 66 is interposed between the head portion 61 of the bolt 6 and the facing wall portion 31.

FIG. 7 is a cross-sectional view showing a stopper mechanism in the winch drum 1 according to the first embodiment. This stopper mechanism has a function of restricting the first flange 3A from being displaced inward W1 in the width direction with respect to the winding cylinder 2. That is, the stopper mechanism defines the minimum allowable value of the distance between the pair of flanges 3A and 3B. Since both the position adjusting mechanism shown in FIG. 4 and the stopper mechanism shown in FIG. 7 are provided, the first flange 3A is displaced to the inner side W1 in the width direction and the outer side W2 in the width direction with respect to the winding cylinder 2. Be regulated. The specific configuration of the mechanism shown in FIG. 7 is as follows.

As shown in FIGS. 5 and 7, the winch drum 1 includes a plurality of bolts 7 (four bolts 7 in the specific example shown in FIG. 5). The plurality of bolts 7 are arranged so as to be spaced apart from each other along the circumferential direction of the annular first flange 3A. As shown in FIG. 7, each bolt 7 has a head portion 71 and a shaft portion 72 extending from the inner surface 74 of the head portion 71 and having a male screw 73 formed on the outer peripheral surface thereof.

As shown in FIG. 7, the facing wall portion 31 of the first flange 3A has a plurality of screw holes 314 penetrating the facing wall portion 31 in the width direction W. The plurality of screw holes 314 are formed at positions corresponding to the plurality of bolts 7 shown in FIG. A female screw 315 is formed on the inner surface of each screw hole 314.

Each bolt 7 has its head 71 located on the outer side W2 in the width direction with respect to the facing wall portion 31, and the male screw 73 of the shaft portion 72 is screwed into the female screw 315 of the screw hole 314 of the facing wall portion 31. Be placed. Each bolt 7 has a tip surface 75 located at the tip of its shaft portion 72. The tip surface 75 of the shaft portion 72 of each bolt 7 faces the outer surface 222 of the flange portion 22 of the winding cylinder 2 in the width direction W. As shown in FIG. 7, when the tip surface 75 of the shaft portion 72 is in contact with the outer surface 222 of the flange portion 22 of the winding cylinder 2, the first flange 3A is inside W1 in the width direction with respect to the winding cylinder 2. Displacement to is regulated.

In the stopper mechanism, by rotating a plurality of bolts 7 in the tightening direction, the minimum allowable value of the distance between the pair of flanges 3A and 3B can be increased, and the plurality of bolts 7 are rotated in the opposite directions in the tightening direction. By making it possible, the minimum allowable value of the distance between the pair of flanges 3A and 3B can be reduced.

Hereinafter, the operation of the position adjusting mechanism will be described. In the first embodiment, as shown in FIG. 3, the rope R is orderedly wound up to the second layer L2 along the outer peripheral surface 211 of the winding body 2 in the winch drum 1. Then, the winding of the rope R is continued, and the rope R is wound in the order of the third layer L3, the fourth layer L4, and the fifth layer L5.

Then, for example, when the rope R of the third layer L3 finishes winding from the first row to the last row, the operator forms a relatively large gap between two adjacent ropes R in the third layer L3. If so, the position adjusting mechanism is used to reduce the distance between the pair of flanges 3A and 3B. On the other hand, if, for example, in the third layer L3, the rope R does not enter the third layer L3 before reaching a preset predetermined number of rows, the operator uses a position adjusting mechanism to pair the flanges. Increase the distance between 3A and 3B. The specific operation of the position adjustment mechanism is as follows.

With reference to FIG. 4, the operator rotates the head portion 61 of the bolt 6 in the tightening direction by a tool when the distance between the pair of flanges 3A and 3B is reduced. As a result, the shaft portion 62 of the bolt 6 further enters the screw hole 23 of the winding cylinder 2 toward the inner side W1 in the width direction. At this time, the inner surface 64 of the head 61 of the bolt 6 presses the washer 66 inward W1 in the width direction, and the inner surface 67 (regulating surface S1) of the washer 66 is outside the facing wall portion 31 constituting the regulated surface S2. A part of the side surface 222 is pressed inward W1 in the width direction. As a result, the first flange 3A is displaced inward W1 in the width direction by the amount of entry of the shaft portion 62 according to the amount of rotation of the bolt 6 in the tightening direction.

For example, the operator rotates the bolt 6 in the tightening direction as described above until the gap formed between the ropes R in the third layer L3 is almost eliminated, so that the first flange 3A with respect to the winding cylinder 2 Is continuously displaced inward W1 in the width direction. As a result, the distance between the pair of flanges 3A and 3B is finely adjusted so as to have an optimum size. FIG. 4 shows a state in which the inner side surface 321 of the first flange 3A is located on the inner side W1 in the width direction by the dimension A with respect to the inner side surface 221 of the flange portion 22 of the winding cylinder 2 by the position adjustment as described above. ..

Further, when increasing the distance between the pair of flanges 3A and 3B, the operator rotates the head portion 61 of the bolt 6 in the direction opposite to the tightening direction by a tool. As a result, the shaft portion 62 of the bolt 6 retracts toward the outer side W2 in the width direction with respect to the screw hole 23 of the winding cylinder 2. At this time, the inner surface 64 of the head portion 61 of the bolt 6 and the inner surface 67 (regulatory surface S1) of the washer 66 are displaced to the outer side W2 in the width direction by the same distance as the amount of retreat of the shaft portion 62. This allows the first flange 3A to be displaced to the outer side W2 in the width direction with respect to the winding cylinder 2 by the amount of retreat of the shaft portion 62 according to the amount of rotation in the direction opposite to the tightening direction.

The displacement of the first flange 3A with respect to the winding cylinder 2 with respect to the outer side W2 in the width direction is performed, for example, by the operator pulling the first flange 3A toward the outer side W2 in the width direction. Further, the displacement of the first flange 3A to the outer side W2 in the width direction with respect to the winding body 2 is automatically caused by the force exerted on the outer side W2 in the width direction by the rope R wound around the winding body 2 with respect to the first flange 3A. It may be done. In this way, by rotating the bolt 6 in the direction opposite to the tightening direction of the bolt 6, the first flange 3A is continuously displaced to the outer side W2 in the width direction with respect to the winding cylinder 2. As a result, the distance between the pair of flanges 3A and 3B is finely adjusted so as to have an optimum size.

When the position of the first flange 3A is adjusted by the position adjusting mechanism shown in FIG. 4, the tip surface 75 of the shaft portion 72 of each bolt 7 and the outer surface 222 of the flange portion 22 of the winding cylinder 2 are used in the stopper mechanism shown in FIG. The gap between them is widened to a sufficient size in advance so as not to interfere with the position adjustment. Then, the position of the first flange 3A is adjusted by the position adjusting mechanism, the distance between the pair of flanges 3A and 3B is adjusted to the optimum size, and then the plurality of bolts 7 are tightened in the stopper mechanism shown in FIG. By rotating in the direction, the tip surface 75 of the shaft portion 72 is brought into contact with the outer surface 222 of the flange portion 22 of the winding cylinder 2. As a result, the displacement of the first flange 3A is restricted so that the first flange 3A does not displace from the optimum position to the inner side W1 in the width direction.

The timing for adjusting the distance between the pair of flanges 3A and 3B is not limited to when the rope R of the third layer L3 described above has finished winding, and for example, when the rope R of the fifth layer L5 shown in FIG. 4 has finished winding. Alternatively, it may be when the rope R of the odd-numbered layer has finished winding, such as when the rope R of the seventh layer has finished winding, or when all the layers have finished winding. Further, the adjustment of the distance between the pair of flanges 3A and 3B may be performed a plurality of times. Further, when the position adjusting mechanism is provided on the opposite side of the winding cylinder 2 in the width direction W, that is, when the second flange 3B is configured to be displaceable with respect to the winding cylinder 2, the pair of flanges 3A The timing for adjusting the distance between the and 3B may be when the rope R of the even-numbered layer of the fourth layer L4 or higher has been wound. Further, the timing for adjusting the distance between the pair of flanges 3A and 3B may be performed before the winch drum 1 winds the rope (before the start of winding). The term “before the start of winding” can be exemplified, for example, before the product of the winch drum 1 is shipped, before the winch drum 1 is used, or before the work using the winch drum 1 is performed. As described above, in the winch drum 1 according to the first embodiment, the distance between the pair of flanges 3A and 3B is adjusted by winding the rope R before the winch drum 1 winds the rope R (before the start of winding). This can be done either after winding the rope R on the way.

Further, in the first embodiment, the head portion 61 of the bolt 6 is arranged so as to be located on the outer side W2 in the width direction with respect to the facing wall portion 31 of the first flange 3A. Therefore, it is not necessary to provide a recess for accommodating the head portion 61 of the bolt 6 on the inner side surface 221 of the flange portion 22 of the winding cylinder 2 or the inner side surface 321 of the flange body 22 of the first flange 3A. Therefore, the inner side surface 221 of the flange portion 22 of the winding cylinder 2 is formed by a continuous surface, and at least the portion of the inner side surface 321 of the flange body 22 of the first flange 3A where the rope R faces the width direction W is , Consists of continuous planes. This makes it possible to prevent the rope R from being worn when the rope R is wound around the flange portion 22 of the winding cylinder 2 or when the rope R is unwound from the flange portion 22 of the winding cylinder 2.

In the first embodiment, as shown in FIG. 4, the width direction is equal to the dimension A between the inner side surface 321 of the first flange 3A and the inner side surface 221 of the flange portion 22 of the winding cylinder 2 by the above-mentioned position adjusting mechanism. A step may be formed in W. The step is formed in a circular shape centered on the rotation axis K, and is a uniform step continuous in the circumferential direction over the entire circumference of the boundary portion between the first flange 3A and the flange portion 22 of the winding cylinder 2. be. Further, the direction in which this step is formed substantially coincides with the direction in which the rope R extends. Therefore, the step has a smaller effect on the wear of the rope R than the recess for accommodating the head of the bolt described above.

[Second Embodiment]
FIG. 8 is a cross-sectional view showing a mechanism for adjusting the position of the first flange 3A in the winch drum 1 according to the second embodiment of the present invention.

The winch drum 1 according to the second embodiment is different from the first embodiment described above in the specific configuration of the position adjusting mechanism provided at one end of the winding cylinder 2. The winch drum 1 according to the second embodiment is the same as the first embodiment except for the position adjusting mechanism. Therefore, in the following, the second embodiment will be described only with the configuration different from the first embodiment, and the description of the same configuration as the first embodiment will be omitted.

As shown in FIG. 8, in the second embodiment, the regulation surface S1 in the position adjusting mechanism is composed of the tip surface 65 of the shaft portion 62 of the bolt 6, and the regulated surface S2 facing the regulation surface S1. Is composed of a part of the outer surface 322 of the first flange 3A. Further, in the second embodiment, the drum body 11 is composed of the winding body 2 and the facing member 9, and the regulating member 10 is composed of a plurality of bolts 6.

The first flange 3A is provided at a position adjacent to the flange portion 22 of the winding cylinder 2 on the outer side in the radial direction. The first flange 3A has the flange body 32 as in the first embodiment, but does not have the facing wall portion 31 as in the first embodiment.

The facing member 9 is arranged on the outer side W2 in the width direction with respect to the outer side surface 222 of the flange portion 22 of the winding cylinder 2 and the outer side surface 322 of the first flange 3A, and faces the outer side surfaces 222 and 322. .. The facing member 9 has, for example, an annular shape centered on the rotation axis K.

The facing member 9 is fixed to the winding body 2 by a fixing member. The fixing member may be any as long as it can fix the facing member 9 to the winding cylinder 2, and its specific configuration is not particularly limited. In the specific example shown in FIG. 8, the facing member 9 is fixed to the winding body 2 by a bolt 8 as a fixing member. The bolt 8 has a head 81 and a shaft portion 82 extending from the inner surface of the head 81 and having a male screw 83 formed on an outer surface thereof.

The facing member 9 has a through hole 95 penetrating in the width direction W at a portion facing the outer surface 222 of the flange portion 22 of the winding body 2 in the width direction W. On the outer surface 222 of the winding cylinder 2, a screw hole 28 is formed at a portion facing the facing member 9. A female screw 29 is formed on the inner surface of the screw hole 28. The screw hole 28 is a hole drilled halfway through the thickness of the flange portion 22 of the winding cylinder 2 from the outer surface 222 of the winding cylinder 2 toward the inner side W1 in the width direction. That is, each screw hole 28 is not a through hole that penetrates the flange portion 22. Each screw hole 28 is open only to the outer surface 222 of the flange portion 22, and is not open to the inner side surface 221 of the flange portion 22. Therefore, the inner side surface 221 of the flange portion 22 is composed of continuous surfaces.

The head portion 81 of the bolt 8 is located on the outer side W2 in the width direction of the facing member 9, the shaft portion 82 is inserted into the through hole 95 of the facing member 9, and the male screw 83 of the shaft portion 82 is the screw of the winding cylinder 2. It is arranged in a state of being screwed into the female screw 29 of the hole 28. A washer 84 is interposed between the head 81 of the bolt 8 and the facing member 9. As a result, the facing member 9 is fixed to the winding cylinder 2. A plurality of bolts 8 and corresponding through holes 95 and screw holes 28 are provided along the circumferential direction of the facing member 9.

In the second embodiment, the plurality of bolts 6 are arranged at intervals from each other along the circumferential direction about the rotation axis K, as in the first embodiment shown in FIG.

The facing member 9 has a plurality of screw holes 93 penetrating in the width direction W at a portion facing the outer surface 322 of the first flange 3A in the width direction W. A female screw 94 is formed on the inner surface of each screw hole 93. The plurality of screw holes 93 are formed at positions corresponding to the plurality of bolts 6.

The head portion 61 of each bolt 6 is located on the outer side W2 in the width direction of the facing member 9, the male screw 63 of the shaft portion 62 is screwed into the female screw 94 of the screw hole 93 of the facing member 9, and the shaft portion 82 is formed. The tip surface 65 is arranged in a state of being located inside W1 in the width direction with respect to the facing member 9.

A gap in the width direction W is formed between the inner side surface 91 of the facing member 9 and the outer surface 322 of the first flange 3A, and the first flange 3A is placed on the outer side W2 in the width direction within the range of the size of the gap. Can be displaced to. Further, a gap in the width direction W is formed between the outer surface 92 of the facing member 9 and the inner surface 64 of the head portion 61 of the bolt 6, and the width of the first flange 3A is within the range of the size of the gap. It can be displaced to W1 inside the direction.

In the second embodiment, when the head portion 61 of the bolt 6 located on the outer side W2 in the width direction is rotated in the tightening direction by a tool or the like by the facing member 9, the shaft portion 62 of the bolt 6 faces the inner side W1 in the width direction. It moves in the screw hole 93 of the member 9. Since the facing member 9 is fixed to the winding cylinder 2, the shaft portion 62 of the bolt 6 moves to the inner side W1 in the width direction, so that the tip surface 65 of the shaft portion 62 of the bolt 6 constituting the regulation surface S1 is covered. It abuts on a part of the outer surface 322 of the first flange 3A constituting the regulation surface S2, and presses a part of the outer surface 322 against the inner side W1 in the width direction. As a result, the first flange 3A is displaced inward W1 in the width direction by the amount of movement of the shaft portion 62 according to the amount of rotation of the bolt 6 in the tightening direction. In this way, the first flange 3A is continuously displaced inward W1 in the width direction with respect to the winding cylinder 2 according to the amount of rotation of the bolt 6 in the tightening direction of the bolt 6. As a result, the distance between the pair of flanges 3A and 3B is finely adjusted so as to have an optimum size.

Further, in the second embodiment, when the head portion 61 of the bolt 6 is rotated in the direction opposite to the tightening direction by a tool or the like, the shaft portion 62 of the bolt 6 is moved to the outer side W2 in the width direction with respect to the screw hole 93 of the facing member 9. Retreat towards. As a result, the tip surface 65 of the shaft portion 62 of the bolt 6 constituting the regulation surface S1 is displaced to the outer side W2 in the width direction by the same distance as the amount of retreat of the shaft portion 62. This allows the first flange 3A to be displaced to the outer side W2 in the width direction with respect to the winding cylinder 2 by the amount of retreat of the shaft portion 62 according to the amount of rotation in the direction opposite to the tightening direction. As a result, the first flange 3A is continuously displaced to the outer side W2 in the width direction with respect to the winding cylinder 2 according to the amount of rotation of the bolt 6 in the direction opposite to the tightening direction of the bolt 6. As a result, the distance between the pair of flanges 3A and 3B is finely adjusted so as to have an optimum size.

Further, in the second embodiment, the bolt 6 is arranged so that its head 61 is located on the outer side W2 in the width direction with respect to the facing member 9 of the first flange 3A. Therefore, as described above, it is not necessary to provide a recess for accommodating the head 61 of the bolt 6 on the inner side surface 321 of the first flange 3A, so that it is possible to prevent the rope R from being worn due to the recess. can.

[ Third form ]
FIG. 9 is a cross-sectional view showing a mechanism for adjusting the position of the first flange 3A in the winch drum 1 according to the third embodiment .

As shown in FIG. 9, in the winch drum 1 according to the third embodiment , the guide groove 4 as in the first embodiment shown in FIG. 4 is not provided on the outer peripheral surface 211 of the winding cylinder 2. Further, the winding cylinder 2 does not have the flange portion 22 as in the first embodiment. Therefore, the inner side surface 321 of the first flange 3A is provided at a position where the ropes R of the first layer L1 and above, that is, the ropes R of all the layers face each other in the width direction W. The winch drum 1 according to the third embodiment is different from the first embodiment described above in these points, and has the same configuration as the first embodiment except for the above points. Therefore, in the following, only the configuration different from the first embodiment will be described with respect to the third embodiment , and the description of the same configuration as the first embodiment will be omitted.

As shown in FIG. 9, in the third embodiment , since the guide groove 4 is not provided on the outer peripheral surface 211 of the winding cylinder 2, there is a problem that a gap is formed between the ropes R wound around the winch drum 1. Further, the problem that the rope R does not enter the layer before reaching the specified number of rows is more likely to occur even in the lower layer including the first layer L1 as compared with the first and second embodiments. Therefore, the inner side surface 321 of the first flange 3A is provided at a position corresponding to the rope R of all the layers of the first layer L1 and above. The same applies to the fourth form described later.

As shown in FIG. 9, in the third embodiment , the regulation surface S1 in the position adjusting mechanism is the inner surface 67 of the washer 66 interposed between the head portion 61 of the bolt 6 and the facing wall portion 31 of the first flange 3A. The regulated surface S2 pressed against the regulation surface S1 is composed of a part of the outer surface 312 of the facing wall portion 31 of the first flange 3A.

The winding cylinder 2 has a plurality of screw holes 23 drilled in the width direction W from the outer surface 222 of the side plate 26 which is the outer surface of the winding cylinder 2. A female screw 24 is formed on the inner surface of each screw hole 23. The plurality of screw holes 23 are formed at positions corresponding to the plurality of bolts 6 (positions similar to the positions corresponding to the plurality of bolts 6 in the first embodiment shown in FIG. 5). As shown in FIG. 9, each screw hole 23 is a hole formed in the side plate 26 of the winding cylinder 2 from the outer surface 222 of the side plate 26 toward the inner side W1 in the width direction halfway through the thickness of the side plate 26. That is, each screw hole 23 is not a through hole that penetrates the side plate 26.

The head portion 61 of each bolt 6 is located on the outer side W2 in the width direction with respect to the facing wall portion 31 of the first flange 3A, and the shaft portion 62 thereof is inserted into the through hole 313 of the facing wall portion 31 to form the shaft portion 62. The male screw 63 is arranged in a state of being screwed into the female screw 24 of the screw hole 23.

Since the operation of the position adjusting mechanism according to the third embodiment is the same as that of the first embodiment, the description thereof will be omitted.

[ Fourth form ]
FIG. 10 is a cross-sectional view showing a mechanism for adjusting the position of the first flange 3A in the winch drum 1 according to the fourth embodiment .

As shown in FIG. 10, in the winch drum 1 according to the fourth embodiment , the guide groove 4 as in the second embodiment shown in FIG. 8 is not provided on the outer peripheral surface 211 of the winding cylinder 2. Further, the winding cylinder 2 does not have the flange portion 22 as in the second embodiment. Therefore, the inner side surface 321 of the first flange 3A is provided at a position where the ropes R of the first layer L1 and above, that is, the ropes R of all the layers face each other in the width direction W. The winch drum 1 according to the fourth embodiment is different from the second embodiment described above in these points, and has the same configuration as the second embodiment except for the above points.

Since the operation of the position adjusting mechanism according to the fourth embodiment is the same as that of the second embodiment, the description thereof will be omitted.

[Other variants]
The present invention is not limited to the embodiments described above. The present invention includes, for example, the following forms.

In each of the above embodiments, only the first flange 3A is configured to be displaceable in the width direction W with respect to the winding cylinder 2, and the second flange 3B is configured to be non-displaceable with respect to the winding cylinder 2. , Not limited to this. Both the first flange 3A and the second flange 3B may be configured to be displaceable in the width direction W with respect to the winding cylinder 2. In this case, the second flange 3B is configured to be displaceable in the width direction W with respect to the winding cylinder 2 by the same mechanism as the first flange 3A described above.

In the first embodiment and the second embodiment, the inner side surface 221 of the flange portion 22 of the winding cylinder 2 is provided at a position where the ropes R of the first layer L1 and the second layer L2 face each other in the width direction W. The inner side surface 321 of the flange 3A is provided at a position where the rope R of the third layer L3 or higher faces the width direction W, but the present invention is not limited to this. For example, the inner side surface 221 of the flange portion 22 of the winding cylinder 2 is provided at a position where the rope R of the first layer L1 faces the width direction W, and the inner side surface 321 of the first flange 3A is the second layer L2 or higher. The rope R may be provided at a position facing the width direction W.

In the first embodiment described above, the winch drum 1 is provided with a stopper mechanism (see FIG. 7) that regulates the displacement of the first flange 3A to the inner side W1 in the width direction with respect to the winding cylinder 2. The mechanism can also be provided in the second embodiment and the third to fourth embodiments . The stopper mechanism may be omitted in the first to second embodiments and the third to fourth embodiments .

Further, in the first embodiment and the third embodiment , when the optimum position of the first flange 3A with respect to the winding body 2 is known in advance, the inner side surface 311 of the facing wall portion 31 and the outer surface of the winding body 2 are formed. A plate-shaped member (spacer) can also be arranged in the gap formed between the 222 and the plate. Thereby, it is possible to restrict the displacement of the first flange 3A from the optimum position to the inner side W1 in the width direction.

In the second embodiment and the fourth embodiment , the case where the facing member 9 has an annular shape is exemplified, but the facing members 9 are not limited to the annular shape and are spaced apart from each other in the circumferential direction about the rotation axis K. It may be composed of a plurality of members arranged apart from each other, and in this case, the bolt 6 and the bolt 8 are arranged for each member.

In the first embodiment and the third embodiment , the regulating member 10 is composed of a plurality of bolts 6 and a plurality of washers 66, but the plurality of washers 66 can be omitted. Further, the regulating member 10 may include still another member in addition to the bolt 6 and the washer 66. When the inner surface of the other member is located on the innermost side W1 in the width direction among the members constituting the regulating member 10, the inner surface of the other member constitutes the regulating surface S1. That is, in a state where the inner surface 64 of the head 61 of the bolt 6 faces the regulated surface S2 in the width direction W, the washer 66 is between the inner surface 64 of the head 61 of the bolt 6 and the regulated surface S2. Not only when the inner surface 64 of the head 61 of the bolt 6 faces the regulated surface S2 in the width direction W without using other members such as, but also the inner surface 64 and the regulated surface of the head 61 of the bolt 6 The case where the inner surface 64 of the head portion 61 of the bolt 6 faces the regulated surface S2 in the width direction W via another member such as a washer 66 with S2 is also included.

In the second embodiment and the fourth embodiment , another member (for example, a part of the outer surface 322 of the first flange 3A) is between the tip surface 65 of the shaft portion 61 of the bolt 6 and the regulated surface S2. A plate-shaped member) may be interposed. That is, in a state where the tip surface 65 of the shaft portion 61 of the bolt 6 faces the regulated surface S2 in the width direction W, between the tip surface 65 of the shaft portion 61 of the bolt 6 and the regulated surface S2. Not only when the tip surface 65 of the shaft portion 61 of the bolt 6 faces the regulated surface S2 in the width direction W without using other members, but also the tip surface 65 and the regulated surface of the shaft portion 61 of the bolt 6 The case where the tip surface 65 of the shaft portion 61 of the bolt 6 faces the regulated surface S2 in the width direction W via another member with S2 is also included.

1 winch drum 2 winding body 21 cylinder part 211 outer peripheral surface of winding body 22 flange part 221 inner surface of flange part (inner side surface of winding body)
222 Outer surface of flange (outer surface of winding body)
23 Threaded hole of winding body 24 Female thread of screw hole 3A 1st flange 3B 2nd flange 31 Facing wall part 311 Inner side surface of facing wall part 312 Outer side surface of facing wall part 313 Through hole of facing wall part 32 Flange body 321 Flange body Inner side surface of 322 Flange body outer surface 6 Bolt 61 Head 62 Shaft 63 Male thread 64 Head inner surface 65 Shaft tip surface 66 Washer 67 Washer inner surface 9 Opposing member 91 Opposing member inner surface 92 Outer surface of facing member Side surface 93 Threaded hole of facing member 94 Female thread of screw hole of facing member 10 Restricting member 11 Drum body R Rope S1 Restricting surface S2 Restricted surface W Width direction W1 Width direction Inside W2 Width direction outside

Claims (4)

The drum body including the winding body from which the rope is wound, and
A first flange provided at one end in the width direction of the winding body, which has an inner side surface facing the rope in the width direction and an outer surface opposite to the inner side surface thereof, with respect to the drum body. The one that is configured to be displaceable in the width direction and the one that can be displaced in the width direction.
A second flange provided at the other end of the winding cylinder in the width direction, and
Equipped with regulatory members including bolts,
The bolt has a head and a shaft portion extending from the inner surface of the head and having a male screw formed on an outer peripheral surface, and the male screw is screwed into a female screw provided on the drum body.
The restricting member is located on the outer side in the width direction with respect to the regulated surface formed by a part of the outer surface of the first flange, and by hitting the regulated surface, the outer side of the first flange in the width direction. Has a regulatory surface that regulates displacement to
In the restricting member, the restricting surface is displaced inward in the width direction by rotating the bolt in the tightening direction, while the restricting surface is displaced in the width direction by rotating the bolt in the direction opposite to the tightening direction. Configured to displace outwards ,
The winding cylinder has a tubular portion having an outer peripheral surface on which the rope is wound, and a flange portion extending radially outward from the widthwise one end portion of the tubular portion.
The outer peripheral surface of the cylinder portion of the winding cylinder has a guide groove for guiding the rope of the first layer to be wound around the outer peripheral surface.
The flange portion of the winding body has an inner surface on which the rope of the low layer including the first layer faces in the width direction.
The inner side surface of the first flange is a winch drum provided at a position where the high-rise rope having a larger number of layers than the lower layer faces in the width direction . The first flange has a facing wall portion facing the outer surface of the winding cylinder, and a flange main body extending radially outward from the facing wall portion and including the inner surface surface.
The facing wall portion has a through hole penetrating in the width direction.
The winding cylinder has a screw hole formed in the outer surface of the winding cylinder inward in the width direction and provided with the female screw.
The shaft portion of the bolt is inserted into the through hole of the facing wall portion, and the shaft portion is inserted into the through hole.
The male screw of the shaft portion is screwed into the female screw of the screw hole of the winding body.
The regulated surface is composed of at least a part of the outer surface of the facing wall portion.
The winch drum according to claim 1, wherein the inner surface of the head of the bolt faces the regulated surface in the width direction outside the regulated surface. The drum body further includes an opposing member fixed to the winding cylinder in a state of facing the outer surface of the winding cylinder and the outer surface of the first flange.
The facing member has a screw hole that penetrates in the width direction and is provided with the female screw.
The male screw on the shaft portion of the bolt is screwed into the female screw in the screw hole of the facing member.
The winch drum according to claim 1, wherein the tip surface of the shaft portion of the bolt faces the regulated surface in the width direction outside the regulated surface in the width direction. It is provided with a lower traveling body and an upper rotating body that is rotatably arranged on the lower traveling body.
A crane on which the winch drum according to any one of claims 1 to 3 is mounted on the upper swing body.

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