Rewinder

Abstract

To provide a winch capable of preventing occurrence of random winding of a linear member while maintaining a function to raise or lower an object along a slope by winding and releasing the linear member such as a wire rope.SOLUTION: In a random winding prevention device 21, first and second vertical guide members 25, 26 are provided extending vertically near a drum 4 and on the winding direction side of a linear member 20 with respect to the drum 4, and a third guide member 22 is provided laid laterally on a winding-start side with respect to the drum 4 of the linear member 20, and arranged extending between a pair of supporting bodies 3, 3 of a structure 2 so as to be located on the drum 4 center side with respect to the first and the second guide members 25,26.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a hoist that raises or lowers an object along a slope by winding and feeding out a linear member such as a wire rope, and in particular to a hoist that has a structure that prevents the wire rope or other linear member from becoming irregularly wound when being wound. [Background technology]

[0002] For example, as shown in Patent Document 1, a ship lifting device equipped with a hoist may be used to raise a platform carrying a ship along a slope from a body of water, such as the sea, a lake, or a river, to land, or conversely, to lower a platform carrying a ship along a slope from land to the water.

[0003] In such a ship lifting device, when a wire rope is attached to the platform on which the ship is placed and the platform is raised by winding the wire rope with a hoist, there is a risk of the wire rope becoming irregularly wound around the drum of the hoist, making it difficult for the drum of the hoist to rotate, or other problems occurring.

[0004] As a measure against erroneous winding of linear members such as wire ropes, for example, the cable winding device of Patent Document 2 shows a configuration having an anti-sway member that reduces the occurrence of erroneous winding, in which the wire bends in the axial direction of the drum and goes beyond the circular plate portions at both ends of the drum, resulting in the wire being wound off-axis in the direction of the drum's central axis of rotation. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2005-263128 A [Patent Document 2] Patent No. 5986691 Publication Summary of the Invention [Problem to be solved by the invention]

[0006] However, the anti-vibration member of the cable winding device shown in Patent Document 2 adjusts the angle of an inclined line that extends toward the axial center of the drum while touching the surface of the central line side of the cable with respect to the central line of the cable that is perpendicular to the axis of the drum at the axial center of the drum, by displacing the position of the anti-vibration member, as shown in Figure 8 of Patent Document 2. Accordingly, it is said that the longer the distance from the rotation center line of the drum (synonymous with the central line of the cable described above), the greater the angle of the inclined line becomes, making the anti-vibration member of Patent Document 2 more effective (paragraph "0057" of Patent Document 2).

[0007] On the other hand, in a hoist 1 that displaces an object D (for example, the platform 102 of a ship lifting device 100) by winding up a linear member 20 such as a wire cable, when the object D located on a slope is wound up from a position lower than the drum 4, the angle R1 of the line L2 extending from the winding start end P of the linear member 20 on the drum 4 to the object D naturally becomes larger than the line L1 extending horizontally from the winding start end P of the linear member 20 on the drum 4, as shown by the solid line in Fig. 6 of the present application. Therefore, the part of the start side of winding and unwinding of the linear member 20 on the drum 4 can be restricted to the drum 4 side. Therefore, as shown by a dashed line in FIG. 6 of the present application, when the angle R2 of the line L3 extending from the winding starting end P of the linear member 20 on the drum 4 to the object D with respect to the line L1 is small, it is possible to eliminate the problem of the linear member 20 trying to wind around the drum 4 at a desired position without using the idea of ​​adjusting the angle R3 of the line L4 with respect to the line L1 by arranging a device X at a position slightly away from the drum 4, such as the anti-swaying member of Patent Document 2, as shown by a two-dot chain line in FIG. 6 of the present application.

[0008] However, in a hoist 1 that raises or lowers an object D along a slope by winding up a linear member 20 such as a wire rope, for example, when the rotational speed of the drum 4 is set relatively fast, even if the angle R1 of the line L2 extending from the winding starting end P of the linear member 20 on the drum 4 to the object D relative to the L1 is large, as described above, a problem occurs in that when the linear member 20 is wound up, the linear member 20 gets caught between the axial side end of the drum 4 and the support of a structure such as a case that supports the drum 4, resulting in irregular winding.

[0009] The present invention has been made to solve such problems, and its main objective is to provide a hoist that has the function of raising or lowering an object along a slope by winding up a linear member such as a wire rope, while preventing the linear member from becoming unbalanced. [Means for solving the problem]

[0010] In order to achieve the above object, the hoist of the present invention is configured to include a structure having at least a pair of upright supports, and a drum pivotally supported by the pair of supports and around which a linear member is wound, an object is connected to the tip end of the linear member, and the linear member is wound onto the drum and fed out by the rotation of the drum, thereby displacing the object along a slope in a direction toward or away from the drum. In this hoist, first and second upright guide members for regulating movement of the linear member in the axial direction of the drum are provided near the drum on the side of the drum in the winding direction of the linear member as a device for preventing irregular winding of the linear member. Establishment, A third guide member in a horizontally-inclined shape for restricting radial movement of the linear member on the drum is stretched between the pair of supports of the structure on the start side of winding the linear member on the drum so as to be closer to the center of the drum in the radial direction than the first and second guide members. At the same time, the first and second guide members are attached to mounting portions protruding from cylindrical members respectively fitted around an axis member constituting the third guide member in a radial direction of the third guide member, so that the cylindrical members can rotate about the axis member.The present invention is characterized in that the structure can be various objects such as a support part for supporting the drum and a housing for accommodating certain devices and components of the hoist. The linear member can be a wire rope, a cable, etc. The object can be a platform on which a barge can be placed and moved. The connection to the object can be made by interposing a movable pulley therebetween. The start side of winding the linear member on the drum can be the side above the drum (top winding) or the side below the drum (bottom winding). The first guide member, the second guide member, and the third guide member are all located near the drum, and are set on the outer periphery (three directions: left, right, and top with respect to the drum) of the movement (winding and letting out) range of the wire rope.

[0011] As a result, when the drum is rotated to wind the linear member onto the drum, as the portion of the linear member at the start of winding onto the drum moves in the radial direction of the drum, the portion is prevented from moving in the radial direction away from the drum by the third guide member of the irregular winding prevention device, which is installed between the pair of supports of the structure and located on the outer periphery of the movement range of the linear member when wound onto and let off from the drum. Furthermore, as the linear member moves in the axial direction of the drum when wound onto the drum, the portion is prevented from moving outward beyond the axial end of the drum by the first and second guide members of the irregular winding prevention device, which are installed near the drum on the side of the winding direction of the linear member relative to the drum and located on the outer periphery of the movement range of the linear member when wound onto and let off from the drum.

[0012] and, The cylindrical member to which the first guide member is attached and the cylindrical member to which the second guide member is attached each rotate about the shaft member as a rotation axis, and the second guide member can rotate independently. In this way, the first and second guide members are rotated so that their ends face upward, and the side in the winding direction of the linear member is opened relative to the drum. It is possible to make it a state. Effect of the Invention

[0013] As described above, according to the hoist of the present invention, when the drum is rotated to wind the linear member onto the drum, the portion of the linear member at the start of winding onto the drum moves in the radial direction of the drum, so that the portion does not move radially away from the drum. This can be prevented by the third guide member of the irregular winding prevention device installed between a pair of supports of the structure, and when the linear member moves in the axial direction of the drum as it is wound onto the drum, the portion does not move outward beyond the axial end of the drum. This can be prevented by the first and second guide members of the irregular winding prevention device installed near the drum on the side of the drum in the winding direction of the linear member.

[0014] and, If the first and second guide members get in the way when performing maintenance or other work on the wire rope of the hoisting machine, the first and second guide members can be rotated so that their ends face upward, leaving the side of the drum in the winding direction of the linear member open, thereby improving work efficiency. [Brief description of the drawings]

[0015] [Figure 1] 1 is a schematic diagram showing an example of a ship lifting device equipped with a hoist to which the present invention is applied. [Diagram 2] FIG. 1(a) is a front view showing an outline of an example of a hoist to which the present invention is applied, and FIG. 1(b) is a schematic diagram showing the positional relationship between the drum of the hoist and the first, second and third guide members that regulate the movement of a linear member. [Diagram 3] 1 is a plan view showing an outline of an example of a hoist to which the present invention is applied. [Figure 4] 4 is an enlarged view showing an outline of the configurations of a first guide member, a second guide member and a third guide member that regulate the movement of a linear member. FIG. [Diagram 5] 13 is a top view showing an outline of a state in which the first and second guide members that regulate the movement of the linear member are rotated about the third guide member so that their ends face upward. FIG. [Figure 6]This is a schematic diagram showing that in a hoist to which the present invention is applied, it is not necessary to place a device for preventing irregular winding at a position away from the drum in order to adjust the angle from the winding start end of the drum to the platform so that it is relatively large with respect to a horizontal reference line. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0017] 1 to 5 show an example of a hoist 1 to which the present invention is applied and a ship lifting device 100 equipped with this hoist 1.

[0018] As shown in Fig. 1, the ship lifting device 100 is configured to have at least a platform 102 placed on two rails 101, 101, a hoist 1, and a linear member 20 such as a wire rope connecting the platform 102 and the hoist 1. A part of the platform 102 is shown in Fig. 1. As shown by the dashed line in Fig. 1, the platform 102 is a platform on which a ship 103 such as a barge is placed. The platform 102 has wheels (not shown), and as the wheels roll on the rails 101, 101, the platform 102 can be displaced in a direction toward or away from a drum 4 of the hoist 1 (described below) along the longitudinal direction of the rails 101, 101.

[0019] The ship lifting device 100 is a device for vertically displacing (raising and lowering) a slope of a platform 102 carrying a ship 103 using a hoist 1, and is used for lifting an object located below the hoist 1 up to the vicinity of the hoist 1, but can also be used as a device for sending out the platform 102 carrying a ship 103 above the hoist 1, although this is not shown. However, for the sake of convenience, the present invention will be described on the premise that the hoist 1 is used for lifting the platform 102 up to the vicinity of the hoist 1, and differences in configuration, etc. when used to send out the platform 102 above the hoist 1 will be mentioned as necessary.

[0020] 1 to 5, the hoist 1 is configured to include a structure 2 provided with a pair of upright supports 3, 3, a drum 4 journaled by the supports 3, 3 and for winding up and letting out the linear member 20, and a base 5. Although not shown, the structure 2 includes tools and devices required for rotating and stopping the drum 4 to wind up and let out the linear member 20, such as a motor for rotating the drum 4, a stopper for stopping the rotation of the drum 4, and bearings for the drum 4.

[0021] 2(a), for example, the supports 3, 3 are located on both sides of the drum 4 in the axial direction and support the shafts 41, 41 of the drum 4 so that the drum 4 can rotate, and in this embodiment, are configured to stand upright facing upward from a base 5. Note that, on the surface of the support 3 facing the drum 4, a circular or arc-shaped protective cover is often formed on the radially outer side of the drum 4 around which the linear member 20 is wound; however, since this makes it difficult to see the space S between the axial end of the drum 4 and the support 3, the protective cover is omitted in the illustration in this embodiment for convenience.

[0022] As shown, for example, in the schematic diagram of the hoist seen from the front in Fig. 2(a) and the schematic diagram of the drum 4 and the irregular winding prevention device 21, etc., in Fig. 2(b), the drum 4 has a cylindrical wound portion 42 with a uniform outer diameter from one end to the other end in the axial direction, and flanges 43, 43 are formed at both ends in the axial direction, where the linear member 20 protrudes radially outward from the wound portion 42. However, the wound portion 42 may also be columnar in shape with an outer diameter that gradually decreases from the end toward the center in the axial direction, although not shown.

[0023] The hoist 1 is provided with a random winding prevention device 21 that is constituted at least by a guide member 22 that is laid across the supports 3, 3 in a horizontal position, and guide members 25, 26 that are connected at one end to the guide member 22, so as to prevent random winding of the linear member 20 caused by the high speed rotation of the drum 4 when the linear member 20 is wound around the drum 4. The guide members 22, 25, 26 are formed of a metal such as steel.

[0024] 4, the guide member 22 in this embodiment is configured to include three cylindrical tubular members 221, 222, and 223 with both ends open, and a columnar shaft member 224 inserted into the tubular members 221, 222, and 223 arranged in parallel in the axial direction. In this embodiment, both end portions of the shaft member 224 are threaded, and a fastener 27 having a threaded inner surface such as a nut can be screwed into the shaft member 224. As a result, the guide member 22 is attached to the supports 3, 3 by inserting the shaft member 224 into the tubular members 221, 222, and 223 arranged between the supports 3, 3, and then attaching the fastener 23 to the portion of the shaft member 224 protruding outward from the support 3 and fastening it. However, in this embodiment, since the tubular members 221 and 223 rotate around the shaft member 224 as the center of rotation, as described below, the fastening by the fastener 23 must be such that the tubular members 221 and 223 do not come into close contact with the tubular member 222 or the support body 3.

[0025] In this embodiment, as shown in Fig. 4, the guide member 25 is configured to have a cylindrical main body 251 with both ends open, a tip end 252 arranged closer to the other end side (tip end side) of the guide member 25 than the main body 251 and having a screw hole (not shown) opening on the main body 251 side, and a columnar core member 253 inserted from one end side (base end side) of the guide member 25 into the main body 251 and having a tip reaching the screw hole of the tip end 252. The main body 251 occupies most of the outer shape of the guide member 25. The tip end 252 has a large diameter portion 252a with the same outer diameter as the main body 251 and a small diameter portion 252b with an outer diameter smaller than that of the main body 251. 2 and 4, the guide member 25 is in an upright shape with the side opposite to the tip 252 of the main body 251 facing directly upward or nearly upward (the side opposite to the upper surface of the base 5) and the small diameter portion 252b of the tip 252 facing directly downward or nearly downward (the upper surface side of the base 5) at least when the drum 4 is rotated to wind or pull out the linear member 20. That is, the guide member 25 is in an upright shape extending vertically or nearly vertically from one end side to the other end side in the axial direction so as to intersect with the linear member 20 being wound or pulled out at least when the drum 4 is rotated to wind or pull out the linear member 20. In this embodiment, both end portions of the core member 253 are threaded, and the upper end side can be screwed with a fastener 27 having a threaded inner surface such as a nut, and the lower end side can be screwed with the tip 252. In this embodiment, the main body 251 is fitted to the core member 253 inserted into a through hole (not shown) of a thin plate-like attachment portion 221a protruding from the cylindrical member 221 of the guide member 22 in the radial direction of the cylindrical member 221, and then the tip portion 252 is screwed to the tip of the core member 253, and the fastener 27 is fitted to the part protruding from the attachment portion 221a of the core member 253 on the opposite side to the main body 251 and fastened, so that the guide member 25 is attached to the guide member 22. The main body 251 may be cylindrical in shape and rotatable about the core member 253. As a result, even if the linear member 20 hits the side of the main body 251 of the guide member 25, the main body 251 rotates, so that the impact of the linear member 20 on the main body 251 is mitigated.

[0026] 4, the guide member 26 in this embodiment is configured to have a cylindrical main body 261 with both ends open, a tip end 262 arranged closer to the other end (tip end) of the guide member 26 than the main body 261 and having a screw hole (not shown) opening on the main body 261 side, and a columnar core member 263 inserted from one end (base end) of the guide member 26 into the main body 261 and having a tip reaching the screw hole of the tip end 262. The main body 261 occupies most of the outer shape of the guide member 26. The tip end 262 has a large diameter portion 262a having the same outer diameter as the main body 261 and a small diameter portion 262b having an outer diameter smaller than that of the main body 261. 2 and 4, the guide member 26 is in an upright shape with the side opposite to the tip 262 of the main body 261 facing directly upward or nearly upward (the side opposite to the upper surface of the base 5) and the small diameter portion 262b of the tip 262 facing directly downward or nearly downward (the upper surface side of the base 5) at least when the drum 4 is rotated to wind or pull out the linear member 20. That is, the guide member 26 is in an upright shape extending vertically or nearly vertically from one end side to the other end side in the axial direction so as to intersect with the linear member 20 being wound or pulled out at least when the drum 4 is rotated to wind or pull out the linear member 20. In this embodiment, both end portions of the core member 263 are threaded, and the upper end side can be screwed with a fastener 27 having a threaded inner surface such as a nut, and the lower end side can be screwed with the tip 262. In this embodiment, the main body 261 is fitted to the core member 263 inserted into a through hole (not shown) of a thin plate-like attachment portion 223a protruding from the cylindrical member 223 of the guide member 22 in the radial direction of the cylindrical member 223, and then the tip portion 262 is screwed to the tip of the core member 263, and the fastener 27 is fitted to the part protruding from the attachment portion 223a of the core member 263 on the opposite side to the main body 261 and fastened, so that the guide member 26 is attached to the guide member 22. The main body 261 may have a cylindrical core member 262 that is rotatable about the core member 262 as a rotation center. As a result, even if the linear member 20 hits the side of the main body 261 of the guide member 26, the main body 261 rotates, so that the hit of the linear member 20 against the main body 261 is mitigated.

[0027] In such irregular winding prevention device 21, as shown in Fig. 4, the guide member 22 is located closer to the center in the radial direction of the drum 4 than the upper ends of the guide members 25, 26 which are uprightly installed in the vertical direction. Furthermore, as shown in Fig. 2(b) and Fig. 3, the guide member 22 is located above a line extending diagonally downward from the uppermost winding start end of the linear member 20 which is wound in multiple layers around the winding portion 42 of the drum 4 and whose winding start end is the top winding.

[0028] 3 and 4, when the guide members 25, 26 are in a vertically upright position, they are disposed close to the drum 4 in the winding direction of the linear member 20, and are disposed such that the space S between the axial end of the drum 4 and the support 3 is hidden by the guide members 25, 26 when the drum 4 is viewed from the winding direction of the linear member 20, as shown in Fig. 2 and 4. The arrangement of the guide members 25, 26 in close proximity to the drum 4 means, for example, an arrangement in which the linear member 20 does not enter the gap S between the guide members 25, 26 and the axial end of the drum 4.

[0029] As a result, guide member 22 and guide members 25 and 26 are all positioned near drum 4 and are set on the outer periphery (three directions: left, right, and top relative to drum 4) of the movement (winding and unwinding) range of linear member 20, as shown in Figure 2(b).

[0030] Therefore, it is possible for the guide member 22 to hold down the line from the winding start end of the linear member 20 from above to prevent the linear member 20 from moving radially outward relative to the winding portion 42 of the drum 4, and it is also possible for the linear member 20 to be restricted from moving beyond the axial end of the drum 4 as it moves axially relative to the winding portion 42 of the drum 4 by hitting the guide members 25, 26. Therefore, it is possible to prevent irregular winding from occurring even if the winding speed of the drum 4 is high.

[0031] When the platform 102 carrying the ship 103 is sent out above the hoist 1, the starting end of the winding of the linear member 20 is below the drum 4, and although not shown, the guide member 22 is installed horizontally on the supports 3, 3 below the drum 4, and the guide members 25, 26 are arranged to stand upright facing upward from the guide member 22 when preventing irregular winding.

[0032] In this invention, by rotating the cylindrical members 221, 223 of the guide member 22 about the shaft member 224 as the center of rotation, the guide members 25, 26 attached to the attachment portions 221a, 223a of the cylindrical members 221, 223 can also be rotated about the shaft member 224 as the center of rotation. Therefore, when the guide members 25, 26 are an obstacle to performing work such as maintenance on the linear member 20 of the hoisting machine 1, as shown in Fig. 5, the guide members 25, 26 can be rotated so that the tip portions 252, 262 face upward, respectively, to open the side of the winding direction of the linear member 20 relative to the drum 4, thereby improving the efficiency of the work.

[0033] In this way, the guide members 25, 26 are rotatable about the shaft member 224 of the guide member 22 as the center of rotation, and in order to prevent the guide members 25, 26 from accidentally rotating, a rotation restriction rod 28 for restricting the rotation of the guide members 25, 26 is installed between the supports 3, 3. In this embodiment, the rotation restriction rod 28 is linear and has an outer diameter smaller than that of the guide member 22, and the rotation of the guide members 25, 26 is restricted by the small diameter portions 252a, 262b of the tip portions 252, 262 of the guide members 25, 26 hitting the rotation restriction rod 28. When the small diameter portions 252a, 262b of the tip portions 252, 262 hit the rotation restriction rod 28, the guide members 25, 26 are in an upright state extending in the vertical direction or in a shape close to the vertical direction as described above. [Explanation of symbols]

[0034] 1 Hoisting machine 2 structure 3 Support 4 Drums 20 Linear members 21 Anti-disturbance winding device 22 Guide member (third guide member) 221, 223 Cylinder member 221a, 223a Mounting part 224 Shaft member 25 Guide member (first guide member) 26 Guide member (second guide member)

Claims

[Claim 1] A hoisting machine including a structure having at least a pair of upright supports and a drum pivotally supported by the pair of supports and wound with a linear member, an object is connected to a tip end of the linear member, and the linear member is wound on the drum by rotation of the drum, thereby displacing the object along a slope in a direction toward or away from the drum, As the device for preventing irregular winding of the linear member, a first guide member and a second guide member each having a vertical shape for restricting movement of the linear member in an axial direction of the drum are provided near the drum on a side of the drum in a winding direction of the linear member; a third guide member arranged to be laid horizontally on the drum so as to restrict radial movement of the linear member, the third guide member being laid across the pair of supports of the structure on the start side of winding the linear member onto the drum, the third guide member being closer to the radial center of the drum than the first and second guide members; A hoist characterized in that the first and second guide members are attached to mounting portions protruding radially from tubular members respectively fitted around an axis member constituting the third guide member, so that each of the tubular members can rotate around the axis member as a center of rotation.

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