drum

Abstract

To provide a drum that can reduce the work load of removing a rope wound around the drum from the drum.SOLUTION: A drum has a winding drum 2 around which a rope is wound, and flanges 3 which are provided at each end of the winding drum 2 in the axial direction of the winding drum 2 and project outward in the radial direction of the winding drum 2 relative to the winding drum 2. One of the flanges 3 is a detachable flange 3a that can be attached to and detached from the winding drum 2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a drum on which a rope is wound. [Background technology]

[0002] Patent Document 1 discloses a rope reeling device that reels out a rope while applying tension to it toward a winch drum of a crane. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2018-52629 Summary of the Invention [Problem to be solved by the invention]

[0004] When removing a replacement rope from the drum of a crane winch, the rope must be reeled out from the winch drum, wound onto the drum of a winding device, and then reeled out from the drum. However, winding and reeling the rope is a heavy workload.

[0005] An object of the present invention is to provide a drum that can reduce the workload involved in removing a rope wound around the drum from the drum. [Means for solving the problem]

[0006] The present invention is characterized in that it comprises a hoisting drum on which a rope is wound, and flanges provided at both ends of the hoisting drum in the axial direction of the hoisting drum, which protrude radially outward from the hoisting drum, one of the flanges being a detachable flange that can be attached to and detached from the hoisting drum. [Effects of the Invention]

[0007] According to the present invention, the detachable flange is detachable from the hoisting drum. Therefore, for example, after winding a rope onto the hoisting drum, the hoisting drum can be positioned with the detachable flange facing downwards so that the axial direction of the hoisting drum is vertical, and the detachable flange can be removed from the hoisting drum and lifted to separate the rope wound around the hoisting drum. This allows the rope to be easily removed from the drum with the rope wound around it. This reduces the workload of removing the rope from the drum. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. [Figure 2] FIG. 2 is a view of FIG. 1 as seen from direction A. [Figure 3] 3 is an enlarged view of a main part B of FIG. 2, showing a state in which a detachable flange is fixed to a shaft. [Figure 4] 3 is an enlarged view of a main part B of FIG. 2, showing a state in which the detachable flange is released from the shaft. FIG. [Figure 5] FIG. [Figure 6] FIG. 1 is a side view of a crane. [Figure 7] FIG. 2 is a side view of the drum, showing the drum in a mounted state. [Figure 8] FIG. 10 is a side view of the drum showing the state in which the support member is attached to the detachable flange. [Figure 9] FIG. 2 is a side view of the drum with the detachable flange separated. [Figure 10] FIG. 10 is a perspective view of the rope on the detachable flange. [Figure 11] FIG. 2 is a view of a modified example of FIG. 1 as seen from the direction A. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[0010] (Drum configuration) The drum in this embodiment is a drum on which a rope is wound. As shown in Fig. 1, which is a perspective view of a drum 1, the drum 1 has a hoisting drum 2, a flange 3, and a shaft 4.

[0011] A rope is wound around the hoisting drum 2. Flanges 3 are provided on both ends of the hoisting drum 2 in the axial direction of the hoisting drum 2. The flanges 3 protrude outward from the hoisting drum 2 in the radial direction of the hoisting drum 2.

[0012] In this embodiment, the hoisting drum 2 has a plurality of segmented members 11 arranged side by side in the circumferential direction of the flange 3, each extending in the axial direction of the hoisting drum 2. In this embodiment, the segmented members 11 are rod-shaped, but they may also be plate-shaped and curved along the circumferential direction of the flange 3. Also, in this embodiment, the number of segmented members 11 is four, but it may be three or less, or five or more.

[0013] The shaft 4 is the axis of the drum 1. The shaft 4 passes through the radial center of the flange 3. Bushings 12 are fitted to both ends of the shaft 4. A driven coupling 13 is provided at one end of the shaft 4. This driven coupling 13 is connected to a drive coupling provided on the shaft of a motor of a rope winding device, which will be described later.

[0014] Here, one of the pair of flanges 3 is a detachable flange 3a that is detachable from the hoisting drum 2. As shown in Fig. 2, which is a view of Fig. 1 from direction A, the drum 1 has a fixing member 5. The fixing member 5 detachably fixes the detachable flange 3a to the shaft 4.

[0015] As shown in FIGS. 3 and 4, which are enlarged views of a main portion B in FIG. 2, the fixing member 5 has an insertion bar 14, a pin 15, and a detachable pin 16. The insertion bar 14 is attached to the detachable flange 3a by a mounting member 17 so as to be movable forward and backward in the radial direction of the detachable flange 3a. An elongated hole 14a is formed in the center of the insertion bar 14. A pin 15 is fixed to the detachable flange 3a and passes through the inside of this elongated hole 14a. This pin 15 regulates the forward and backward direction of the insertion bar 14.

[0016] A through-hole 4a is formed in the shaft 4, penetrating in the direction of advancement and retreat of the insertion bar 14. As shown in FIG. 3, when the insertion bar 14 is moved toward the shaft 4, the shaft-side end of the insertion bar 14 is inserted into the through-hole 4a of the shaft 4. This fixes the detachable flange 3a to the shaft 4. On the other hand, as shown in FIG. 4, when the insertion bar 14 is moved away from the shaft 4, the shaft-side end of the insertion bar 14 comes out of the through-hole 4a of the shaft 4. This makes the detachable flange 3a attachable to and detachable from the shaft 4.

[0017] An engagement portion 14b is provided at the end of the insertion bar 14 opposite the shaft 4. This engagement portion 14b is formed in a U-shape. In other words, it has a shape with a space formed inside. The detachable pin 16 is attached to and detached from the detachable flange 3a. As shown in FIG. 3, the position where the detachable pin 16 is attached is inside the engagement portion 14b when the end of the insertion bar 14 on the shaft 4 side is inserted into the through-hole 4a of the shaft 4. By attaching the detachable pin 16 to the detachable flange 3a inside the engagement portion 14b, the insertion bar 14 cannot move forward or backward in the radial direction of the detachable flange 3a.

[0018] As shown in FIG. 1, the drum 1 has a gap member 6. The gap member 6 is attached to the inner surface of the detachable flange 3a. The gap member 6 is, for example, prismatic and extends from the shaft 4 toward the radial end of the detachable flange 3a. The gap members 6 are provided at 90-degree intervals around the circumference of the detachable flange 3a. The gap members 6 form a gap between the rope wound around the hoisting drum 2 and the detachable flange 3a. In other words, in the axial direction of the hoisting drum 2, the rope is not wound around the end where the gap member 6 exists, so when the rope is wound around another portion, a gap is formed between the rope and the detachable flange 3a.

[0019] The portion of the hoisting drum 2 on the detachable flange 3a side is made diameter-reducible. Specifically, one axial end of the segment 11 is attached with a pin to a flange 3 different from the detachable flange 3a so that the segment 11 can swing freely in the radial direction of the hoisting drum 2 when the detachable flange 3a is removed from the hoisting drum 2, and the other axial end of the segment 11 is detachably attached to the detachable flange 3a. Therefore, when the detachable flange 3a is removed from the hoisting drum 2, each of the multiple segment members 11 can swing freely in the radial direction.

[0020] The gap member 6 and the detachable flange 3a each have a through-hole formed therein that communicates with each other. The number of through-holes formed is at least the same as the number of segment members 11. The ends of the segment members 11 are inserted into these through-holes. As described above, the segment members 11 are free to swing in the radial direction, but by inserting the ends of the segment members 11 into the through-holes, the positions of the ends of the segment members 11 are fixed.

[0021] Here, the lengths of the multiple divided members 11 are different. If the multiple divided members 11 were all the same length, when inserting the ends of the divided members 11 into the through holes, it would be necessary to position all of the divided members 11 that can swing radially and insert all of the divided members 11 into the through holes at the same time, which would be inefficient. In contrast, if the multiple divided members are all different lengths, when inserting the ends of the divided members 11 into the through holes, it would be possible to easily insert all of the divided members 11 into the through holes by positioning and inserting the divided members 11 in order starting from the longest divided members 11.

[0022] The drum 1 also has a support member 7 (see FIG. 8). The support member 7 is attached to the detachable flange 3a and extends in the axial direction of the hoisting drum 2. After the rope is wound around the hoisting drum 2, the support member 7 is attached to the detachable flange 3a at a position radially outward of the flange 3 from the outer periphery of the rope.

[0023] As shown in Fig. 5, which is a side view of the rope winding device 50, the drum 1 is attached to the rope winding device 50. The rope winding device 50 has a motor 51 and a drum support member 52. A drive coupling is provided at the tip of the shaft of the motor 51. This drive coupling is connected to a driven coupling 13 provided at one end of the shaft 4.

[0024] A pair of drum support members 52 are provided, each supporting an end of the shaft 4, specifically, a bushing 12.

[0025] When the drum 1 is rotated by the motor 51, the rope that is unwound from the drum of the crane winch is wound onto the hoisting drum 2 of the drum 1.

[0026] (Crane configuration) 6, which is a side view of crane 20, crane 20 is configured to hoist and lower a load (not shown), and has a configuration in which an upper rotating body 22 is rotatably provided on top of a crawler-type lower traveling body 21. Note that crane 20 is not limited to a crawler-type crane, and may also be a wheel-type crane.

[0027] The upper rotating body 22 has a rotating frame 23, a boom 24, a gantry 25, a lower spreader 26, a winch 27, and a counterweight 28.

[0028] The swivel frame 23 is attached to the lower running body 21 via a swivel bearing (not shown). The boom 24 is connected to the front of the swivel frame 23 so as to be able to rise and fall relative to the swivel frame 23. The boom 24 is, for example, a lattice boom. One end of a boom guy line 29 is connected to the tip of the boom 24.

[0029] A point sheave 32 is provided at the tip of the boom 24. A hook device 34 is suspended from this point sheave 32 via a hoisting rope 33.

[0030] The gantry 25 is attached to the rear of the revolving frame 23. The lower spreader 26 is attached to the upper end of the gantry 25. A boom hoisting rope 31 is hung between the lower spreader 26 and an upper spreader 30 connected to the other end of the boom guy line 29.

[0031] A plurality of winches 27 are arranged in the center of the revolving frame 23. The winches 27 are used to wind and unwind ropes, and are used to hoist and lower a suspended load, raise and lower the boom 24, and the like.

[0032] The winch 27 includes a hook winch and a boom hoist winch. The hook winch winds in or pays out the hoisting rope 33 to raise or lower the hook device 34. The boom hoist winch winds in or pays out the boom hoist rope 31 to raise or lower the boom 24 around the boom foot pin 24s, which serves as the boom 24's fulcrum.

[0033] The counterweight 28 is mounted on the rear of the revolving frame 23.

[0034] In the crane 20 configured as described above, work is performed to replace the rope wound around the drum of the winch 27. The rope to be replaced, which has been unwound from the drum of the winch 27, is wound onto the winding body 2 of the drum 1 attached to the rope winding device 50.

[0035] (Rope removal work) The operation of removing the rope wound around the hoisting drum 2 of the drum 1 from the drum 1 is performed as follows. The following description will be given with reference to side views of the drum 1 shown in FIGS. 7 to 9. First, as shown in FIG. 7, a crane is used to lift the drum 1 with a wire fastened to the flange 3. Then, the drum 1 is placed on a pedestal 60 placed on the ground, with the detachable flange 3a facing downwards. Next, as shown in FIG. 8, a support member 7 is attached to the detachable flange 3a. Then, the fixing member 5 is operated to release the detachable flange 3a from the shaft 4.

[0036] Next, as shown in Figure 9, the drum 1 from which the detachable flange 3a has been removed is lifted up. As a result, the detachable flange 3a is separated from the shaft 4, and the rope 70 wound around the hoisting drum 2 is separated from the hoisting drum.

[0037] In this way, by releasing the fixation of the detachable flange 3a to the shaft 4, the detachable flange 3a can be removed from the hoisting drum 2. Then, by removing the detachable flange 3a from the hoisting drum 2, the rope 70 can be easily removed from the drum 1 with the rope 70 wound on it. Therefore, the workload involved in removing the rope 70 from the drum 1 can be reduced.

[0038] Here, a tightening force acts on the rope 70 wound around the hoisting drum 2. Therefore, if the portion of the hoisting drum 2 on the detachable flange 3a side is not retractable, the rope 70 wound around the hoisting drum 2 will not easily separate from the hoisting drum 2 even if the hoisting drum 2 is lifted. In contrast, in this embodiment, the portion of the hoisting drum 2 on the detachable flange 3a side is retractable. In other words, when the detachable flange 3a is separated from the shaft 4, the dividing member 11 becomes free to swing. Therefore, by reducing the diameter of the portion of the hoisting drum 2 on the detachable flange 3a side, the rope 70 wound around the hoisting drum 2 can be easily separated from the hoisting drum 2.

[0039] There is a possibility that the rope 70 may collapse after being separated from the hoisting drum 2. However, by attaching the support member 7 to the detachable flange 3a, the rope 70 separated from the hoisting drum 2 can be prevented from collapsing.

[0040] Next, as shown in Fig. 10, which is a perspective view of the rope 70 on the detachable flange 3a, the rope 70 remaining on the detachable flange 3a is bundled with a bundling rope 80. A gap is formed between the rope 70 remaining on the detachable flange 3a and the detachable flange 3a by the gap member 6, and the bundling rope 80 can be passed through this gap. Then, by bundling the rope 70 with the bundling rope 80, the handleability of the rope 70 can be improved.

[0041] (Variation) As shown in FIG. 11 , which is a view of FIG. 1 from direction A, a hole 9 may be formed in the detachable flange 3a, which connects the radially inner region and the radially outer region of the rope 70 wound around the hoisting drum. The hole 9 is, for example, an elongated hole. The hole 9 connects the radially inner region and the radially outer region of the rope 70 remaining on the detachable flange 3a, so that a bundling rope 80 can be passed between them. Furthermore, by bundling the rope 70 with the bundling rope 80, the handleability of the rope 70 can be improved.

[0042] (effect) As described above, in the drum 1 according to this embodiment, the detachable flange 3a is detachable from the hoisting drum 2. Therefore, for example, after the rope 70 has been wound onto the hoisting drum 2, the detachable flange 3a can be placed on the bottom so that the axial direction of the hoisting drum 2 is aligned vertically, and the detachable flange 3a can be removed from the hoisting drum 2 and the hoisting drum 2 can be lifted up, thereby separating the rope 70 wound around the hoisting drum 2 from the hoisting drum 2. In this manner, the rope 70 can be easily removed from the drum 1 on which the rope 70 has been wound. This reduces the workload involved in removing the rope 70 wound onto the drum 1.

[0043] Furthermore, the portion of the hoisting drum 2 on the detachable flange 3a side is made contractible. A tightening force acts on the rope 70 wound around the hoisting drum 2. For example, one possible procedure for separating the rope 70 wound around the hoisting drum 2 from the hoisting drum 2 is to position the hoisting drum 2 with the detachable flange 3a facing downwards so that the axial direction of the hoisting drum 2 is in the up-down direction, remove the detachable flange 3a from the hoisting drum 2, and then lift the hoisting drum 2. However, if the portion of the hoisting drum 2 on the detachable flange 3a side is not contractible, the rope wound around the hoisting drum 2 will not easily separate from the hoisting drum 2 even if the hoisting drum 2 is lifted. In contrast, if the portion of the hoisting drum 2 on the detachable flange 3a side is contractible, the rope 70 wound around the hoisting drum 2 can be easily separated from the hoisting drum 2 by reducing the diameter of the portion of the hoisting drum 2 on the detachable flange 3a side.

[0044] Furthermore, the split member 11 of the hoisting drum 2 is attached to a flange 3 different from the detachable flange 3a so as to be swingable in the radial direction. This allows the split member 11 to swing freely when the detachable flange 3a is removed from the hoisting drum 2, so that the diameter of the portion of the hoisting drum 2 on the detachable flange 3a side can be reduced appropriately.

[0045] Furthermore, the lengths of the multiple divided members 11 are different. If the multiple divided members 11 were all the same length, when inserting the ends of the divided members 11 into the through holes, it would be necessary to position all of the divided members 11 that can swing radially and insert all of the divided members 11 into the through holes at the same time, which would be inefficient. In contrast, if the multiple divided members 11 were all different lengths, when inserting the ends of the divided members 11 into the through holes, it would be possible to easily insert all of the divided members 11 into the through holes by positioning and inserting the divided members 11 in order starting from the longest divided members 11.

[0046] Furthermore, the support member 7 is attached to the detachable flange 3a at a position radially outward from the outer periphery of the rope 70 wound around the hoisting drum 2. There is a possibility that the rope 70 may collapse once it has been separated from the hoisting drum 2. Therefore, by attaching the support member 7 to the detachable flange 3a after the rope 70 has been wound around the hoisting drum 2, it is possible to prevent the rope 70, once separated from the hoisting drum 2, from collapsing.

[0047] In addition, the detachable flange 3a is detachably fixed to the shaft 4. By releasing the fixation of the detachable flange 3a to the shaft 4, the detachable flange 3a can be removed from the hoisting drum 2.

[0048] Furthermore, the gap member 6 forms a gap between the rope 70 wound around the hoisting drum 2 and the detachable flange 3a. As a result, when the detachable flange 3a is removed from the hoisting drum 2, the bundling rope 80 can be passed through the gap between the rope 70 remaining on the detachable flange 3a and the detachable flange 3a. As a result, the rope 70 remaining on the detachable flange 3a can be bundled with the bundling rope 80, thereby improving the handleability of the rope 70.

[0049] Furthermore, the detachable flange 3a is formed with a hole 9 that connects the radially inner region and the radially outer region of the rope 70 wound around the hoisting drum 2. This allows the bundling rope 80 to be passed between the radially inner region and the radially outer region of the rope 70 remaining on the detachable flange 3a when the detachable flange 3a is removed from the hoisting drum 2. This allows the rope 70 remaining on the detachable flange 3a to be bundled with the bundling rope 80, thereby improving the handleability of the rope 70.

[0050] Although the embodiments of the present invention have been described above, they are merely illustrative examples and do not limit the present invention, and the specific configurations and other aspects can be appropriately modified in design. Furthermore, the actions and effects described in the embodiments of the invention are merely a list of the most preferred actions and effects resulting from the present invention, and the actions and effects of the present invention are not limited to those described in the embodiments of the present invention. [Explanation of symbols]

[0051] 1 drum 2 Winding drum 3 flange 3a Detachable flange 4 shafts 5 Fixing member 6 Gap members 7 Support member 9 holes 11 Divided parts 12 Bush 13 Driven coupling 14 Insertion Bar 15-pin 16 Detachable pin 17 Mounting material 20 Crane 21 Undercarriage 22 Upper rotating body 23 Swivel frame 24 Boom 25 Gantry 26 Lower spreader 27 Winch 28 Counterweight 29 Boom Guyline 30 Upper Spreader 31 Boom hoisting rope 32 point sheave 33 Hoisting rope 34 Hook device 50 Rope winding device 51 Motor 52 Drum support member 60 pedestal 70 Rope 80 Binding Rope

Claims

1. A winding drum on which a rope is wound; Flanges are provided on both ends of the winding drum in the axial direction of the winding drum, and protrude radially outward relative to the winding drum; and one of the flanges is a detachable flange that is detachable from the hoisting drum, The hoisting drum is configured so that a portion of the detachable flange side can be reduced in diameter, The winding drum has a plurality of divided members arranged side by side in the circumferential direction of the flange and each extending in the axial direction, one end of the divided member in the axial direction is attached to a flange different from the detachable flange so as to be able to swing freely in the radial direction when the detachable flange is detached from the hoisting drum, The other end of the divided member in the axial direction is detachably attached to the detachable flange.

2. the detachable flange is formed with through holes, through which the ends of the divided members are inserted, the number of which is at least the number of the divided members; 2. The drum of claim 1, wherein each of said plurality of segments has a different length.

3. a support member attached to the detachable flange and extending in the axial direction; 3. The drum according to claim 1, wherein the support member is attached to the detachable flange at a position radially outward from an outer periphery of the rope wound around the hoisting drum.

4. A winding drum on which a rope is wound; Flanges are provided on both ends of the winding drum in the axial direction of the winding drum, and protrude radially outward relative to the winding drum; and one of the flanges is a detachable flange that is detachable from the hoisting drum, The hoisting drum is configured so that a portion of the detachable flange side can be reduced in diameter, a support member attached to the detachable flange and extending in the axial direction; The drum is characterized in that the support member is attached to the detachable flange at a position radially outward from the outer periphery of the rope wound around the hoisting drum.

5. a shaft passing through the radial center of the flange; a fixing member that detachably fixes the detachable flange to the shaft; The drum according to any one of claims 1 to 4, characterized in that it has

6. The drum according to any one of claims 1 to 5, further comprising a gap member that forms a gap between the rope wound around the hoisting drum and the detachable flange.

7. A drum according to any one of claims 1 to 5, characterized in that a hole is formed in the detachable flange to connect a radially inner region and a radially outer region of the rope wound around the hoisting drum.

8. A winding drum on which the rope is wound; Flanges are provided on both ends of the winding drum in the axial direction of the winding drum, and protrude radially outward relative to the winding drum; and one of the flanges is a detachable flange that is detachable from the hoisting drum, The hoisting drum is configured so that a portion of the detachable flange side can be reduced in diameter, A drum characterized in that it has a gap member that forms a gap between the rope wound around the winding drum and the detachable flange.

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