Method for storing cylinders of material handling equipment, and storage trolley for cylinders of material handling equipment

Abstract

To provide a method for storing a cylinder of a cargo handling device capable of suppressing crushing of a seal of a cylinder during storage, and a storage truck for the cylinder of the cargo handling device.SOLUTION: According to a storage method of a cylinder 20 of a cargo handling device 1, a position corresponding to a vertical direction of a seal of the cylinder 20 is changed. Even when the cylinder 20 is stored for a long period of time, it is possible to suppress long-term load on a specific portion of the seal by changing the position corresponding to the vertical direction of the seal of the cylinder 20. Therefore, crushing of the seal of the cylinder 20 during storage can be suppressed.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a method for storing a cylinder of a cargo handling device and a storage carriage for the cylinder of the cargo handling device.

Background Art

[0002] For example, Patent Document 1 describes an unloader as a cargo handling device that unloads objects such as bulk cargo loaded on a ship. This unloader may raise and lower a boom in order to insert a cargo handling section for unloading into the ship's hold. In such a case, a cylinder may be used for raising and lowering the boom.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above-described cargo handling device, a spare cylinder may be stored on site. However, since the cylinder of the cargo handling device is large, the lower part of the seal may be crushed by receiving a long-term load during long-term storage. Therefore, there has been a problem that it is necessary to perform an overhaul again at the time of installation for a spare cylinder that has been overhauled before storage.

[0005] The present invention has been made to solve such problems, and an object thereof is to provide a method for storing a cylinder of a cargo handling device that can suppress crushing of the seal of the cylinder during storage and a storage carriage for the cylinder of the cargo handling device.

Means for Solving the Problems

[0006] The present invention relates to a method for storing a cylinder of a material handling device, comprising the step of changing the position of the cylinder seal corresponding to the vertical direction.

[0007] According to the storage method for the cylinder of a cargo handling device of the present invention, the position of the cylinder seal corresponding to the vertical direction is changed. In this case, even when the cylinder is stored for a long period of time, changing the position of the cylinder seal corresponding to the vertical direction can prevent a specific part of the seal from being subjected to load for a long period of time. Therefore, crushing of the cylinder seal during storage can be suppressed.

[0008] The cylinder may be held in the holding part and rotated around the centerline. By holding the cylinder in the holding part and rotating the cylinder around the centerline, the position corresponding to the vertical direction of the cylinder seal can be easily changed.

[0009] The holding unit may hold the cylinder with the piping still attached. In this case, the cylinder can be stored with the piping still attached.

[0010] The holding portion may be divisible in the circumferential direction. In this case, by dividing the holding portion, the cylinder can be easily placed on the holding portion.

[0011] After rotating the cylinder, it may be fixed in that position. In this case, the cylinder can be stored in the position it was in after rotation.

[0012] The holding part may be movable horizontally to a position where the cylinder is rotated. In this case, the position where the cylinder is stored can be freely selected.

[0013] The storage trolley for the cylinder of a material handling device according to the present invention is a storage trolley for the cylinder of a material handling device that stores the cylinder of the material handling device, and comprises a holding part for holding the cylinder, the holding part changes the position corresponding to the vertical direction of the cylinder seal while holding the cylinder.

[0014] The storage trolley for the cylinders of the cargo handling device according to the present invention provides the same effects and benefits as the storage method for the cylinders of the cargo handling device described above. [Effects of the Invention]

[0015] According to the present invention, it is possible to provide a method for storing cylinders of a material handling device that can suppress the collapse of the cylinder seals during storage, and a storage trolley for cylinders of a material handling device. [Brief explanation of the drawing]

[0016] [Figure 1] This is a schematic side view showing a material handling device in which cylinders stored by a storage trolley for the cylinders of the material handling device according to this embodiment are employed. [Figure 2] This is a side view of the storage trolley. [Figure 3] This is a cross-sectional view along line III-III in Figure 2. [Figure 4] This is a cross-sectional view along line IV-IV in Figure 2. [Figure 5] This is a cross-sectional view showing how the cylinder is placed on the holding section. [Figure 6] This is a cross-sectional view showing the cylinder after it has been rotated. [Figure 7] This is a process diagram showing the storage method for the cylinder of the cargo handling device of this embodiment. [Modes for carrying out the invention]

[0017] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic side view showing a cargo handling device 1 in which a cylinder stored by a cylinder storage carriage according to this embodiment is adopted. As another cargo handling device 1 in this embodiment, an unloader is exemplified. In addition, as the cargo handling device 1, in addition to an unloader, yard machines such as a stacker, a reclaimer, and a stacker reclaimer may be adopted.

[0018] The cargo handling device 1 is a device for continuously discharging an object, that is, cargo (for example, coal, ore, etc.) from a ship's hold to land. The cargo handling device 1 includes a gantry 2, a slewing unit 3, a boom 4, a bucket elevator 6, an excavation unit 7, and a balance adjustment unit 8.

[0019] The gantry 2 is a device that can travel along the quay by two rails laid parallel to the quay. The gantry 2 is a main body portion that can be installed on the upper surface of the quay.

[0020] The slewing unit 3 supports the boom 4 so as to be slewed above the gantry 2. The slewing unit 3 includes a slewing mechanism 10, a gantry frame 11, and a base portion 12. The slewing mechanism 10 is provided on the upper part of the gantry 2 and has a rotating portion that rotates around a rotating shaft extending in the vertical direction. The gantry frame 11 is provided on the upper part of the slewing mechanism 10 and extends upward from the slewing mechanism 10 beyond the boom 4. The base portion 12 is provided on the upper part of the slewing mechanism 10 and supports the boom 4 from below. The gantry frame 11 and the base portion 12 support the boom 4 so as to be able to rise and fall.

[0021] The boom 4 is a frame body that extends horizontally from the slewing unit 3. The boom 4 includes a first portion 4A that extends laterally toward the sea side and supports the bucket elevator 6 and the excavation unit 7, and a second portion 4B that extends laterally toward the side opposite to the sea side and supports the balance adjustment unit 8. The first portion 4A of the boom 4 supports the bucket elevator 6 at the tip end on the sea side. The second portion 4B of the boom 4 supports the balance adjustment unit 8 at the end on the side opposite to the sea side.

[0022] The bucket elevator 6 extends downward from the tip of the first section 4A of the boom 4. The bucket elevator 6 transports the load lifted in the excavation section 7 upwards. The bucket elevator 6 is designed to maintain a vertical position regardless of the elevation angle of the boom 4.

[0023] The excavation unit 7 unloads cargo from the ship. The excavation unit 7 is located below the bucket elevator 6. The excavation unit 7 continuously excavates and scrapes the cargo from inside the ship's hold, and then transports the scraped cargo upwards to unload it.

[0024] The cargo handling device 1 has a luffing cylinder 20. The cylinder 20 is a cylinder for luffing the boom 4. The cylinder 20 has a tube portion 21 and a rod portion 22. The cylinder 20 adjusts the amount that the rod portion 22 protrudes from the tube portion 21 by moving a piston connected to the rod portion 22 back and forth within the tube portion 21. The cylinder 20 can raise the first portion 4A of the boom 4 by increasing the amount that the rod portion 22 protrudes from the tube portion 21. The cylinder 20 can lower the first portion 4A of the boom 4 by decreasing the amount that the rod portion 22 protrudes from the tube portion 21. In this embodiment, piping 23 and a valve block 25 are provided around the tube portion 21 of the cylinder 20 (see Figure 2).

[0025] Next, with reference to Figures 2 to 4, the configuration of the storage trolley 100 for the cylinder 20 of the cargo handling device 1 according to this embodiment will be described. Figure 2 is a side view of the storage trolley 100. Figure 3 is a cross-sectional view along line III-III in Figure 2. Figure 4 is a cross-sectional view along line IV-IV in Figure 2. Figures 2 to 4 show the state immediately after the cylinder 20 is placed on the storage trolley 100, and the position of the holding parts 30A and 30B in this state may be referred to as the "reference position". In the following description, the direction in which the center line CL of the cylinder 20 in the state stored on the storage trolley 100 extends may be referred to as the "axial direction D1". The horizontal direction perpendicular to the axial direction D1 may be referred to as the "width direction D2". The direction around the center line CL may be referred to as the "circumferential direction", the side away from the center line CL may be referred to as the "outer circumference side", and the side approaching the center line CL may be referred to as the "inner circumference side".

[0026] As shown in Figure 2, the storage trolley 100 comprises holding parts 30A, 30B, base parts 31A, 31B, and a trolley part 32. Holding part 30A holds one end of the cylinder 20 in the axial direction D1. Holding part 30B holds the other end of the cylinder 20 in the axial direction D1. Holding part 30B is positioned spaced apart from holding part 30A in the axial direction D1. A pair of cylinder fixing brackets 51 are attached to the holding parts 30A, 30B, respectively, to clamp and fix the joint part 26 at the end of the cylinder 20. Each cylinder fixing bracket 51 is provided to extend in the vertical direction.

[0027] The base portion 31A is provided below the holding portion 30A and rotatably supports the holding portion 30A. The base portion 31B is provided below the holding portion 30B and rotatably supports the holding portion 30B.

[0028] The trolley section 32 connects the base section 31A and the base section 31B and is a member that can move horizontally. The trolley section 32 has a connecting member 33 that extends in the axial direction D1 below the base section 31A and the base section 31B and connects the base section 31A and the base section 31B. The trolley section 32 also has wheels 34 at both ends of the connecting member 33 in the axial direction D1. The wheels 34 have a braking mechanism, and once the storage trolley 100 has moved to its desired position, the position of the storage trolley 100 can be fixed by applying the brakes.

[0029] Next, with reference to Figure 3, the detailed configuration of the holding part 30A and the base part 31A will be described. The holding part 30A is a member that can change the position corresponding to the vertical direction of the seal of the held cylinder 20. The holding part 30A is a member that can rotate the held cylinder 20 around the center line CL. The holding part 30A rotates the cylinder 20 by rotating it around the center line CL while holding the cylinder 20. The holding part 30A can hold the cylinder 20 with the piping 23 attached to it. In addition, the holding part 30A can rotate the cylinder 20 with the piping 23 attached to it.

[0030] As shown in Figure 3, the holding portion 30A comprises a main body portion 40, support portions 41A and 41B, support portions 42A and 42B, and a fixing pin insertion portion 43.

[0031] The main body portion 40 is a cylindrical member provided coaxially with the center line CL. The main body portion 40 has an inner diameter larger than the outer diameter of the cylinder 20 including the piping 23. The main body portion 40 has a flange portion 44 at its axial end D1. The flange portion 44 is provided with protrusions 46 that project axially D1 at a constant pitch in the circumferential direction. The protrusions 46 are the parts that the hook 61 of the lever block (registered trademark) 60 is hooked onto.

[0032] The main body 40 is divisible into two halves in the circumferential direction. Specifically, the main body 40 is divisible into a lower lower portion 35 and an upper upper portion 36. Note that "lower" and "upper" refer to the orientation in the reference position, and depending on the rotation angle of the holding portion 30A, the lower portion 35 may be positioned on the upper side. In the reference position, a line extending vertically and passing through the center line CL is set as the reference line SL. At this time, the lower portion 35 and the upper portion 36 have a symmetrical structure with respect to the reference line SL when viewed from the axial direction D1. Fixing flanges 47 are provided at both ends of the lower portion 35 and the upper portion 36 in the circumferential direction. The fixing flanges 47 of the lower portion 35 and the upper portion 36 are overlapped and fixed with bolts, thereby fixing the lower portion 35 and the upper portion 36 to each other.

[0033] Support parts 41A and 41B are members that support the cylinder 20, which is located inside the main body 40, from the outer circumference. Support parts 41A and 41B have a structure that protrudes inward from the inner surface of the lower part 35. In addition, the inner circumferential wall 41a of support parts 41A and 41B is curved with a curvature corresponding to the outer surface of the cylinder 20. Therefore, the inner circumferential wall 41a of support parts 41A and 41B can support the cylinder 20 by contacting the outer surface of the cylinder 20. Counterweights 41b are provided on the outer circumference of support parts 41A and 41B (areas with hatching). This allows the lower counterweight 41b to balance the structure when the upper piping 23 or valve block 25 (see Figure 2) above the cylinder 20 is heavy. Support parts 41A and 41B are provided at positions spaced apart from each other in the circumferential direction. Therefore, the pipe 23 provided on the cylinder 20 is positioned in the valley between the support portion 41A and the support portion 41B.

[0034] Support parts 42A and 42B are members that support the cylinder 20, which is located inside the main body 40, from the outer circumference. Support parts 42A and 42B have a structure that protrudes inward from the inner circumferential surface of the upper part 36. In addition, the inner circumferential walls 42a of support parts 42A and 42B are curved with a curvature corresponding to the outer circumferential surface of the cylinder 20. Therefore, the inner circumferential walls 42a of support parts 42A and 42B can support the cylinder 20 by contacting the outer circumferential surface of the cylinder 20. Here, the position of the inner circumferential wall 42a can be adjusted in the circumferential direction by an adjustment bolt 42b. This allows the adjustment bolt 42b to adjust the holding force of the cylinder 20 by the holding part 30A. Support parts 42 and 42B are provided at positions spaced apart from each other in the circumferential direction. Therefore, the piping 23 provided on the cylinder 20 is arranged in the valley between support parts 42A and 42B.

[0035] The fixing pin insertion section 43 fixes the holding section 30A to the base section 31A by inserting the fixing pin 49 from the inner circumference side. The fixing pin insertion sections 43 are provided on both sides in the circumferential direction for each support section 41A, 41B, 42A, 42B. As a result, the fixing pin insertion sections 43 are arranged at predetermined intervals in the circumferential direction. In the reference position, the fixing pin insertion section 43 on the support sections 41A and 41B closer to the reference line SL is positioned to correspond to the base section 31A. Therefore, by inserting the fixing pin 49 into the fixing pin insertion section 43, the fixing pin 49 reaches the base section 31A.

[0036] The base portion 31A comprises a main body portion 52 and a plurality of needle roller bearings 53. The main body portion 52 is provided on the connecting member 33 of the trolley portion 32 and is a member that supports the holding portion 30A from below. The plurality of needle roller bearings 53 are arranged in an arc shape along the outer circumferential surface of the main body portion 40 of the holding portion 30A. The needle roller bearings 53 contact the main body portion 40 of the holding portion 30A and thereby rotatably support the main body portion 40. The needle roller bearings 53 are rotatably supported by the main body portion 52.

[0037] A projection 54 is provided at the end of the main body 52 in the width direction D2, projecting in the axial direction D1. This projection 54 is the part that the other hook 62 of the lever block 60 is hooked onto.

[0038] As shown in Figure 4, the holding portion 30B comprises a main body portion 40, support portions 41A and 41B, support portions 42A and 42B, and a fixing pin insertion portion 43. The base portion 31B comprises a main body portion 52 and a plurality of needle roller bearings 53. The holding portion 30B and the base portion 31B have the same configuration as the holding portion 30A and the base portion 31A, so their description is omitted.

[0039] Next, with reference to Figure 7, the storage method for the cylinder 20 of the cargo handling device 1 according to this embodiment will be described. As shown in Figure 7, first, the storage trolley 100 is moved to the storage location (step S10). In step S10, the holding parts 30A and 30B are not placed on the base parts 31A and 31B. In step S10, once the storage trolley 100 reaches the desired position, the brakes on the wheels 34 are applied. Next, the lower part 35 of the holding parts 30A and 30B is placed on the base parts 31A and 31B of the storage trolley 100 (step S20, see Figure 5). In step S20, the lower part 35 is fixed to the base parts 31A and 31B by inserting the fixing pin 49 into the fixing pin insertion part 43.

[0040] Next, the process of placing the cylinder 20 on the holding parts 30A and 30B is performed (step S30, see Figure 5). In step S30, with the cylinder 20 suspended by a crane so that the valve block 25 (see Figure 2) is positioned on the upper side, the cylinder 20 is placed on the lower part 35 of the holding parts 30A and 30B. Next, the process of placing the upper part 36 of the holding parts 30A and 30B on the lower part 35 and fixing it is performed (step S40, see Figure 3). In step S40, the fixing flanges 47 of the lower part 35 and the upper part 36 are overlapped and fixed with bolts. Also in step S40, the cylinder fixing bracket 51 (see Figure 2) is attached.

[0041] Next, a preparatory step is performed to rotate the cylinder 20 together with the holding parts 30A and 30B (step S50). In step S50, the lever block 60 is attached to the extension side of the holding part 30A and the base part 31A (see Figure 3). Here, the hook 62 is hooked onto the protruding part 54 of the base part 31A, and the hook 61 is hooked onto the protruding part 46 of the holding part 30A, which is located downstream of the hook 62 in the rotation direction R1. Also, the lever block 60 is attached to the retraction side of the holding part 30B and the base part 31B (see Figure 4). Here, the hook 62 is hooked onto the protruding part 54 of the base part 31B, and the hook 61 is hooked onto the protruding part 46 of the holding part 30B, which is located upstream of the hook 62 in the rotation direction R1. Also in step S50, the rotation handle 69 is attached to the holding parts 30A and 30B (see Figure 6). In step S50, the fixing pin 49 is removed from the fixing pin insertion part 43 (see Figure 3).

[0042] Next, the cylinder 20 is rotated together with the holding parts 30A and 30B (step S60). In step S60, the operator rotates the holding parts 30A and 30B in the rotation direction R1 using the rotation handle 69, thereby rotating the cylinder 20 to the desired angle. At this time, the lever blocks 60 are operated in the order of "extending the chain 63 of the extension-side lever block 60" and "retracting the chain 63 of the retraction-side lever block 60" to minimize the amount of time the chain 63 is loose.

[0043] Next, the cylinder 20 is fixed to the base parts 31A and 31B together with the holding parts 30A and 30B (step S70). In step S70, the lower part 35 is fixed to the base parts 31A and 31B by inserting the fixing pin 49 into the fixing pin insertion part 43. Also, the chains 63 of the extension lever block 60 and the retraction lever block 60 are tensioned.

[0044] Furthermore, after a predetermined period has elapsed, steps S60 and S70 are performed again. The frequency and angle of rotation are not particularly limited, but for example, during storage of the cylinder 20, it may be rotated by 90° once every three months.

[0045] Next, the method for storing the cylinder 20 of the cargo handling device 1 according to this embodiment, and the operation and effects of the storage trolley 100 will be described.

[0046] The method for storing the cylinder 20 of the cargo handling device 1 according to this embodiment is a method for storing the cylinder 20 of the cargo handling device 1, and includes a step of changing the position of the seal of the cylinder 20 corresponding to the vertical direction.

[0047] According to the storage method for the cylinder 20 of the cargo handling device 1 of this embodiment, the position of the seal of the cylinder 20 corresponding to the vertical direction is changed. Specifically, as shown in Figure 6, before the cylinder 20 is rotated, position "A1" corresponds to the lower part of the seal 80, and position "A2" corresponds to the upper part of the seal 80. After the cylinder 20 is rotated, position "B1" corresponds to the lower part of the seal 80, and position "B2" corresponds to the upper part of the seal 80. In this way, the position of the seal 80 of the cylinder 20 corresponding to the vertical direction can be changed. This makes it possible to suppress the long-term application of load to "A1".

[0048] In this case, even when the cylinder 20 is stored for a long period of time, the position of the seal of the cylinder 20 corresponding to the vertical direction can be changed during storage, thereby preventing a specific part of the seal from being subjected to load for a long period of time. Therefore, crushing of the seal of the cylinder 20 during storage can be suppressed.

[0049] The cylinder 20 is held by the holding parts 30A and 30B, and the held cylinder 20 may be rotated around the centerline. By holding the cylinder 20 with the holding parts 30A and 30B and rotating the cylinder 20 around the centerline, the position of the cylinder 20 corresponding to the vertical direction of the seal can be easily changed.

[0050] The holding parts 30A and 30B may hold the cylinder 20 with the piping 23 still attached to it. In this case, the cylinder 20 can be stored with the piping 23 still attached to it.

[0051] The holding parts 30A and 30B may be divisible in the circumferential direction. In this case, by dividing the holding parts 30A and 30B, the cylinder 20 can be easily placed on the holding parts 30A and 30B.

[0052] After rotating the cylinder 20, it may be fixed in that rotated position. In this case, the cylinder 20 can be stored in the rotated position after rotation.

[0053] The holding parts 30A and 30B may be movable horizontally to a position where the cylinder 20 is rotated. In this case, the position in which the cylinder 20 is stored can be freely selected.

[0054] The storage trolley 100 for the cylinder 20 of the cargo handling device 1 according to this embodiment is a storage trolley 100 for the cylinder 20 of the cargo handling device 1, and includes holding parts 30A and 30B for holding the cylinder 20, and the holding parts 30A and 30B change the position corresponding to the vertical direction of the seal of the cylinder 20 while holding the cylinder 20.

[0055] According to the storage trolley 100 for the cylinder 20 of the cargo handling device 1 in this embodiment, the same effects and advantages as the storage method for the cylinder 20 of the cargo handling device 1 described above can be obtained.

[0056] The cylinders to be stored are not limited to those used for luffing unloaders. For example, cylinders used for luffing reclaimers and stackers, cylinders used for snug mechanisms in container cranes, and cylinders used for swinging CSUs may also be stored. [Explanation of Symbols]

[0057] 1...Cargo handling equipment, 20...Cylinder, 30A, 30B...Holding parts, 100...Storage trolley.

Claims

1. A method for storing the cylinders of a material handling device, A step of placing a holder capable of holding a cylinder onto a base, The process includes: holding the cylinder with the piping attached in the holding part, and rotating the held cylinder together with the holding part around the center line relative to the base part to change the position of the cylinder seal corresponding to the vertical direction, The holding portion comprises a main body which is a cylindrical member having an inner diameter larger than the outer diameter of the cylinder including the piping, and a plurality of support portions provided on the inner circumferential surface of the main body at positions spaced apart from each other in the circumferential direction, and supporting the cylinder placed inside the main body from the outer circumferential side. Storage method for cylinders of cargo handling equipment.

2. The method for storing a cylinder of a cargo handling device according to claim 1, wherein the holding portion is provided with a counterweight to balance the weight of the piping.

3. The base portion is provided with a first projection that rotatably supports the main body portion and is a portion on which the hook is attached, The main body is provided with a plurality of second protrusions in the circumferential direction, which are portions for hooking the hook. A method for storing the cylinder of a cargo handling device according to claim 1 or 2.

4. The method for storing a cylinder of a cargo handling device according to any one of claims 1 to 3, wherein the holding portion is divisible in the circumferential direction.

5. A method for storing a cylinder of a cargo handling device according to any one of claims 1 to 4, wherein the cylinder is rotated and then fixed in the rotated position.

6. The method for storing a cylinder of a cargo handling device according to any one of claims 1 to 5, wherein the holding portion is movable horizontally to a position for performing the step of rotating the cylinder.

7. A storage trolley for the cylinders of a material handling device, A retaining part that holds the cylinder, A base portion that rotatably supports the aforementioned holding portion, Equipped with, The holding portion comprises a main body, which is a cylindrical member having an inner diameter larger than the outer diameter of the cylinder including the piping, and a support portion provided on the inner circumferential surface of the main body, which supports the cylinder, which is located inside the main body, from the outer circumferential side. A storage trolley for a cylinder of a material handling device, wherein the holding portion is rotatable around the centerline relative to the base portion together with the held cylinder, while the cylinder with the piping still attached is held in place, and the position corresponding to the vertical direction of the cylinder's seal can be changed by this rotation.

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