Rope exchange device

Abstract

To provide a rope replacement device capable of performing work for applying tension to a rope and rope replacement work.SOLUTION: A rope replacement device includes: a motor which is arranged on a pedestal and is engaged with a shaft of a drum to rotate the drum; and a pair of support members 6 which are arranged on the pedestal to support one end part and the other end part of the shaft of the drum from below. A lower recessed part 6b to which the shaft of the drum is fitted from above is formed on an upper end part 6a of the support member 6. The rope replacement device includes: a mounting member 7 which is detachably mounted on the upper end part 6a and in which an upper recessed part 7b fitted to the shaft of the drum from above is formed; and a fixing member 8 which can fix the mounting member 7 to the upper end part 6a.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a rope changing device for changing a rope wound around a drum. [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] However, in the current crane usage environment, rope replacement is more frequently required than tensioning the rope, so it is desirable to be able to use a tensioning device such as that disclosed in Patent Document 1 as a rope winding device as well.

[0005] An object of the present invention is to provide a rope exchange device that is capable of applying tension to a rope and exchanging the rope. [Means for solving the problem]

[0006] The present invention is characterized by comprising a base, a motor placed on the base and capable of engaging with the drum shaft to rotate the drum, a pair of support members placed on the base and supporting one end and the other end of the drum shaft from below, the upper end of the support member having a lower recess into which the drum shaft fits from above, an attachment member removably attached to the upper end and having an upper recess into which the drum shaft fits from above, and a fixing member capable of fixing the attachment member to the upper end. [Effects of the Invention]

[0007] According to the present invention, an attachment member is detachably attached to the upper end of a support member. By removing the attachment member from the upper end, the drum can be easily removed from the support member. This allows for easy drum replacement. When the drum supported by the support member is replaced with a drum for winding a rope, the rope to be replaced can be removed from the crane's winch drum by rotating the drum in the rope winding direction. When the drum supported by the support member is replaced with a drum on which a new rope is wound, the new rope can be unwound from the drum and wound onto the crane's winch drum. This allows for rope replacement. When the drum supported by the support member is replaced with a drum for applying tension to the rope, the drum can be rotated to apply tension to the rope being wound onto the crane's winch drum. As described above, the rope tensioning operation and rope replacement operation can be performed. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a side view of the rope exchange device. [Figure 2] FIG. 2 is a top view of the rope exchange device. [Figure 3] FIG. 2 is an enlarged view of a main part A in FIG. [Figure 4] FIG. 1 is a side view of a crane. [Figure 5] FIG. 1 is a perspective view of a drum for winding a rope. [Figure 6] FIG. 1 is a side view of the rope changing device, showing a state in which a drum on which a new rope is wound is attached. [Figure 7] FIG. 10 is a diagram showing a state in which a shaft is inserted into a drum. [Figure 8] FIG. 10 is a diagram showing a state in which a shaft is inserted into the drum. [Figure 9]FIG. 10 shows one state in which a shaft is attached to a drum. [Figure 10] FIG. 10 is a view showing another state in which the shaft is attached to the drum. [Figure 11] FIG. 1 is a side view of the rope exchanger with a tensioning drum attached. DETAILED DESCRIPTION OF THE INVENTION

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

[0010] (Configuration of rope exchange device) The rope exchange device in this embodiment exchanges a rope wound around a drum. As shown in Fig. 1, which is a side view of the rope exchange device 1, and Fig. 2, which is a top view of the rope exchange device 1, the rope exchange device 1 has a base 2, a motor 3, a power source 4, a power source 5, and a support member 6.

[0011] The base 2 is placed on the ground or on the bed of a truck, for example. A motor 3, a power source 4, a power supply 5, and a support member 6 are arranged on the base 2.

[0012] The motor 3 is capable of rotating the drum 40 (see FIGS. 6 and 11). The motor 3 is capable of engaging with the shaft of the drum 40 via a coupling. Specifically, a drive coupling provided on the shaft of the motor 3 is connected to a driven coupling provided on the shaft of the drum 40. In this embodiment, the motor 3 is a hydraulic motor, but it may also be an electric motor.

[0013] The power source 4 is a hydraulic pump or the like that supplies hydraulic oil to the motor 3. The power source 5 supplies electricity to the power source 4. Since the power source 4 and the power source 5 are disposed on the base 2, there is no need to prepare them separately.

[0014] A pair of support members 6 are provided, and support one end and the other end of the drum shaft from below. The drum 40 is disposed between the pair of support members 6.

[0015] 3, which is an enlarged view of a main portion A in FIG. 1, a lower recess 6b into which the shaft of the drum 40 fits from above is formed in the upper end 6a of the support member 6. In addition, a through-hole 6c that passes through the upper end 6a in the horizontal direction is formed in the upper part of the upper end 6a.

[0016] The rope exchanging device 1 has an attachment member 7 and a fixing member 8. The attachment member 7 is detachably attached to the upper end portion 6a of the support member 6. An upper recessed portion 7b into which the shaft of the drum 40 fits from above is formed in the lower portion of the attachment member 7. Furthermore, a through-hole 7c that passes horizontally through the attachment member 7 is formed in the upper portion of the attachment member 7. When the attachment member 7 is attached to the upper end portion 6a of the support member 6, the shaft of the drum 40 (more specifically, a bushing 45, which will be described later) is clamped between the lower recessed portion 6b of the upper end portion 6a of the support member 6 and the upper recessed portion 7b of the attachment member 7.

[0017] The fixing member 8 can fix the mounting member 7 to the upper end portion 6a of the support member 6. The fixing member 8 has a pin 8a and a retaining pin 8b. With the mounting member 7 attached to the upper end portion 6a, the pin 8a is inserted successively through the through-hole 6c in the upper end portion 6a and the through-hole 7c in the mounting member 7, thereby fixing the mounting member 7 to the upper end portion 6a of the support member 6. The retaining pin 8b is inserted into the through-holes formed at both ends of the pin 8a, thereby preventing the pin 8a from coming off.

[0018] As shown in Fig. 2, the base 2 is provided with a space 15 for an operator to stand in. The space 15 is located at a position where the operator can face the drum 40 disposed between the pair of support members 6. Because the space 15 for the operator is provided in the base 2, even when the rope changing device 1 is placed on the bed of a truck, etc., the space for the operator can be suitably secured.

[0019] (Crane configuration) 4, 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] The counterweight 28 is mounted on the rear of the revolving frame 23.

[0027] In the crane 20 configured as described above, the rope wound around the drum of the winch 27 is replaced. When a new rope is supplied to the winch 27, tension is applied to the rope to prevent it from becoming tangled.

[0028] (Rope replacement work) The work of replacing the rope wound around the drum of the winch 27 consists of the work of unwinding the rope to be replaced that is wound around the drum of the winch 27, and the work of winding a new rope around the drum of the winch 27.

[0029] In the operation of unwinding the rope wound around the drum of the winch 27, a rope winding drum is attached to the rope changing device 1. A perspective view of the rope winding drum 41 is shown in FIG. 5. This drum 41 (drum 40) has a hoisting drum formed of four bars 41b arranged around a shaft 41a, which serves as an axis. Flanges 41c are provided on both ends of the hoisting drum in the longitudinal direction of the shaft 41a. Bushings 45 are fitted into both ends of the shaft 41a. A driven coupling 46 is provided on one end of the shaft 41a.

[0030] When attaching the rope winding drum 41 to the rope changing device 1, the attachment member 7 is removed from the upper end 6a of the support member 6, as shown in FIG. 3. Also, as shown in FIG. 1, the cover 3a provided on the top of the motor 3 and covering the drive coupling is removed. Then, the drive coupling provided on the shaft of the motor 3 and the driven coupling 46 provided on the shaft of the drum 41 are connected. Also, as shown in FIG. 3, the bushing 45 is fitted in the lower recess 6b of the upper end 6a, and the shaft 41a is placed in the lower recess 6b. In this way, the drum 41 is disposed between the pair of support members 6.

[0031] Next, the mounting member 7 is attached to the upper end portion 6a of the support member 6, and the mounting member 7 is fixed to the upper end portion 6a by the fixing member 8. Furthermore, as shown in FIG. 1, the cover 3a is attached to the top of the motor 3. In this manner, the drum 41 is attached to the rope changing device 1. In this state, the drum 41 is rotated by the motor 3, and the rope that is unwound from the drum of the winch 27 is wound onto the drum 41.

[0032] When winding of the rope is completed, the mounting member 7 is removed from the upper end portion 6a of the support member 6, the cover 3a is removed from the top of the motor 3, and the drum 41 is removed from the rope changing device 1.

[0033] Next, in the operation of winding a new rope onto the drum of the winch 27, as shown in Figure 6, which is a side view of the rope changing device 1, the drum 42 (drum 40) on which the new rope is wound is attached to the rope changing device 1 in the same manner as the drum 41.

[0034] Here, the drum 42 around which the new rope is wound has a winding drum 42a around which the rope is wound and a flange 42b. The flanges 42b are provided on both ends of the winding drum 42a in the axial direction of the winding drum 42a, and protrude outward from the winding drum 42a in the radial direction of the winding drum 42a. A through-hole 42c is formed in the center of the flange 42b in the radial direction. The drum 42 does not have an axis serving as a shaft.

[0035] Therefore, the rope exchange device 1 has a shaft 9. The shaft 9 is inserted into each of the through holes 42c of the pair of flanges 42b. A driven coupling 46 is provided at one end of the shaft 9.

[0036] 7 shows how the shaft 9 is being inserted into the drum 42. When inserting the shaft 9 into each of the through-holes 42c of the pair of flanges 42b, the shaft 9 is suspended by a crane (not shown) and inserted through the through-hole 42c of one of the flanges 42b. However, if the suspended shaft 9 is at an angle to the axial direction of the drum 42, the tip of the shaft 9 may not be able to be properly inserted through the through-hole 42c of the other flange 42b.

[0037] Therefore, the rope exchanging device 1 has a support member 10. The support member 10 can be inserted into the through-hole 42c of the flange 42b, and is connected to the shaft 9 in the longitudinal direction of the shaft 9. For example, the support member 10 is connected to the shaft 9 by screwing a male thread formed at the tip of the support member 10 into a female thread formed on the shaft 9.

[0038] As shown in Figure 7, with the tip of the shaft 9 inserted into the through-hole 42c of one flange 42b, the support member 10 is inserted through the through-hole 42c of the other flange 42b, connecting the shaft 9 and the support member 10. In this state, the shaft 9 is inserted through the through-hole 42c of the other flange 42b. As shown in Figure 8, which shows the state in which the shaft 9 has been inserted into the drum 42, the shaft 9 and the support member 10 are connected, so when the shaft 9 is inserted, the tip of the shaft 9 always passes through the through-hole 42c of the other flange 42b. After the shaft 9 has been inserted into the drum 42, the support member 10 is removed.

[0039] Here, if the shaft 9 is simply inserted through the drum 42, the shaft 9 will spin freely when the motor 3 is driven. Therefore, as shown in FIG. 7 , a protruding member 9a is provided on the shaft 9 on the side of the driven coupling 46. The protruding member 9a protrudes in a direction perpendicular to the longitudinal direction of the shaft 9. The protruding member 9a has an elongated hole formed along its longitudinal direction. As shown in FIG. 8 , a pin 9b is inserted continuously through this elongated hole and a through-hole formed in the side surface of the flange 42b of the drum 42. This allows the drum 42 to rotate in conjunction with the shaft 9. Although the position of the through-hole formed in the side surface of the flange 42b varies radially depending on the type of drum 42, the hole on the protruding member 9a side is an elongated hole, so the pin 9b can be inserted continuously through any type of drum 42.

[0040] 9, which shows one state in which the shaft 9 is attached to the drum 42, the rope exchanging device 1 has a pair of brackets 11. The bracket 11a on the driven coupling 46 side is fixed (welded) to the shaft 9 on the opposite side of the shaft 9 from the protruding member 9a. The side of the flange 42b of the drum 42 abuts against this bracket 11a. After the shaft 9 is inserted into the drum 42, the bracket 11b on the opposite side to the driven coupling 46 side is fitted onto the shaft 9 and abuts against the side of the flange 42b.

[0041] The bracket 11 is provided with a hanging portion 11c to which a wire for suspending the shaft 9 can be fastened. When the drum 42 is attached to or detached from the rope exchange device 1, the shaft 9 together with the drum 42 is suspended by the wire fastened to the hanging portion 11c.

[0042] The bracket 11 also has a fitting portion 11d that can fit into the through-hole 42c of the flange 42b. The bracket 11a on the driven coupling 46 side has the fitting portion 11d on the opposite side (drum 42 side) from the driven coupling 46. The fitting portion 11d has a shape that tapers from the outside to the inside (right side in the figure) of the drum 42 in the longitudinal direction of the shaft 9.

[0043] The bracket 11b on the opposite side from the driven coupling 46 has a fitting portion 11d provided on one side in the longitudinal direction of the shaft 9. This fitting portion 11d has a shape that tapers toward the tip in the longitudinal direction of the shaft 9. By changing the direction in which the bracket 11b is inserted onto the shaft 9, the fitting portion 11d can be disposed on the drum 42 side or the opposite side from the drum 42. Note that the bracket 11b may have fitting portions 11d provided on both sides in the longitudinal direction of the shaft 9.

[0044] 9, in bracket 11b on the opposite side from driven coupling 46, fitting portion 11d is disposed on the opposite side from drum 42. Therefore, fitting portion 11d is not fitted into through hole 42c of flange 42b. In this case, when shaft 9 is rotated, depending on the diameter of shaft 9 relative to through hole 42c, drum 42 (winding drum 42a) may rattle relative to shaft 9.

[0045] If the drum 42 rattles relative to the shaft 9, as shown in Figure 10, which illustrates another state in which the shaft 9 is attached to the drum 42, the fitting portion 11d of the bracket 11b on the side opposite the driven coupling 46 is disposed on the drum 42 side, and the fitting portion 11d is fitted into the through hole 42c of the flange 42b. Because the fitting portion 11d has a tapered shape, the fitting portion 11d fits firmly into the through hole 42c. This makes it possible to prevent the winding drum 42a from rattling when the drum 42 rotates.

[0046] In this manner, the drum 42 is attached to the rope changing device 1, and the rope unwound from the drum 42 is wound onto the drum of the winch 27.

[0047] (The task of applying tension to the rope) 11, which is a side view of the rope changing device 1, in the work of applying tension to the rope, a tensioning drum 43 (drum 40) is attached to the rope changing device 1 in the same manner as the drum 41. Like the drum 41, this drum 43 also has bushings 45 fitted to both ends of the shaft 43a, and a driven coupling 46 is provided at one end of the shaft 43a.

[0048] The rope is unwound from a drum on which a new rope is wound, which is provided in a rope supplying device (not shown), and is wound onto the drum of winch 27. Rope changing device 1 is disposed between the rope supplying device and crane 20, and the rope unwound from the drum of the rope supplying device is wound around hoisting drum 43b of drum 43. A braking force is then applied to drum 43, thereby applying tension to the rope.

[0049] (effect) As described above, in the rope exchange device 1 according to this embodiment, the attachment member 7 is detachably attached to the upper end 6a of the support member 6. By removing the attachment member 7 from the upper end 6a, the drum 40 can be easily removed from the support member 6. This allows the drum 40 to be easily replaced. When the drum 40 supported by the support member 6 is replaced with the drum 41 for winding the rope, the rope to be replaced can be removed from the drum of the winch 27 of the crane 20 by rotating the drum 41 in the rope winding direction. When the drum 40 supported by the support member 6 is replaced with the drum 42 on which a new rope is wound, the new rope can be unwound from the drum 42 and wound onto the drum of the crane winch 27. This allows the rope to be replaced. When the drum 40 supported by the support member 6 is replaced with the drum 43 for applying tension to the rope, the drum 43 can be rotated so as to apply tension to the rope, thereby applying tension to the rope being wound onto the drum of the crane winch 27. As described above, the work of applying tension to the rope and the work of replacing the rope can be performed.

[0050] Also, it has a power source 4 that drives the motor 3. Therefore, it is not necessary to prepare a separate power source 4, which improves convenience.

[0051] Also, it has a power supply 5 that drives the power source 4. Therefore, there is no need to prepare a separate power supply 5, which improves convenience.

[0052] Additionally, a support member 10 that can be inserted into the through hole 42c of the flange 42b is connected to the shaft 9. When inserting the shaft 9 into each of the through holes 42c of the pair of flanges 42b, the shaft 9 is inserted through the through hole 42c of one of the flanges 42b. However, if the shaft 9 is oblique to the axial direction of the drum 42, the tip of the shaft 9 may not be properly inserted through the through hole 42c of the other flange 42b. Therefore, with the tip of the shaft 9 inserted into the through hole 42c of one of the flanges 42b, the support member 10 is inserted through the through hole 42c of the other flange 42b to connect the shaft 9 and the support member 10. In this state, if the shaft 9 is inserted through the through hole 42c of one of the flanges 42b, the tip of the shaft 9 will always be inserted through the through hole 42c of the other flange 42b. This facilitates the task of inserting the shaft 9 into each of the through holes 42c of the pair of flanges 42b.

[0053] Furthermore, bracket 11, which is fitted onto shaft 9, has fitting portion 11d that can fit into through-hole 42c. Since fitting portion 11d has a tapered shape, fitting portion 11d fits tightly into through-hole 42c. This prevents wobbling of winding drum 42a when winding drum 42a rotates.

[0054] 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]

[0055] 1 Rope exchange device 2 pedestal 3 motors 4 Power source 5 Power supply 6 Support member 6a Upper end 6b Lower recess 7 Mounting material 7b Upper recess 8 Fixing member 9 Shaft 9a Protruding member 9b pin 10 Support member 11 Bracket 11d Mating part 15 spaces 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 40, 41, 42, 43 Drums 41a shaft 41c flange 42a winding drum 42b flange 42c through hole 43a shaft 43b winding drum 45 Bush 46 Driven coupling

Claims

1. A base, a motor disposed on the base and engaging with a shaft of the drum to rotate the drum; a pair of support members disposed on the base and supporting one end and the other end of the drum shaft from below; and A lower recess into which the shaft of the drum fits from above is formed at the upper end of the support member, a mounting member that is detachably attached to the upper end portion and has an upper recess formed therein that fits onto the shaft of the drum from above; a fixing member capable of fixing the mounting member to the upper end portion; and The drum is a winding drum around 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 from the winding drum to the outside in the radial direction of the winding drum; and a through hole is formed in a center portion of the flange in a radial direction of the flange, a shaft of the drum inserted through the through-hole of each of the pair of flanges; a support member that can be inserted into the through hole of the flange and is connected to the shaft in the longitudinal direction of the shaft; A rope exchange device comprising:

2. 2. The rope exchange device according to claim 1, further comprising a power source disposed on the base for driving the motor.

3. 3. The rope exchange device according to claim 2, further comprising a power source arranged on the base and driving the power source.

4. a bracket fitted onto the shaft and abutting against a side surface of the flange; the bracket has a fitting portion that can be fitted into the through hole, The rope changing device according to any one of claims 1 to 3, characterized in that the fitting portion has a shape that tapers from the outside to the inside of the drum in the longitudinal direction of the shaft.

Images