Device for adjusting the position of heavy objects and method for adjusting the position of heavy objects

Abstract

To provide a position adjustment device of a heavy object which hardly causes a failure and can suppress a maintenance cost.SOLUTION: A position adjustment device of a heavy object comprises: a first plane member arranged at a lower face of a jack for lifting the heavy object; a second plane member having an upper face which face-contacts with a lower face of the first plane member; and a moving member for moving the first plane member and the jack in a horizontal direction on the second plane member. By forming the lower face of the first plane part of engineering plastic or a steel material, and forming the upper face of the second plane member of engineering plastic or a steel material, the friction resistance of a contact face can be reduced.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] This invention relates to a position adjusting device and the like for performing position adjustment when installing a heavy object at a predetermined installation position.

Background Art

[0002] When installing a heavy object such as a condenser used in a power plant at a predetermined installation position, in the conventional installation method, the heavy object is placed on a roller or on a cart running on a conveying rail and conveyed to near the installation position, and then the heavy object is lifted by a chain block, and the operator repeats fine adjustment while applying an external force to install the heavy object at the installation position. Therefore, it takes a long time for installation, and since it is an operation of lifting a heavy object, there is a risk.

[0003] Under such circumstances, Patent Document 1 discloses a position adjustment support device used for position adjustment of a heavy object. The position adjustment support device includes an actuator body that expands and contracts in the vertical direction, and a spherical contact bearing provided on the lower surface of the actuator body and capable of freely moving in the horizontal plane, and can be easily moved in the horizontal direction while lifting the heavy object.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the position adjustment support device described in Patent Document 1 has several problems: it is prone to mechanical failures and maintenance costs are high because it uses bearings to support the actuator body and heavy objects. In addition, the device itself tends to be heavy because it includes bearings, which increases installation time and the amount of equipment (materials) required, thus increasing costs; the device itself is taller because it includes bearings, requiring heavy objects to be supported at a higher position; and it requires the provision of multiple support points, such as support points for the actuator and support points for the adjustment bolts.

[0006] Therefore, the objective of this invention is to provide a heavy object positioning device, etc., that is less prone to failure, has reduced maintenance and installation costs, can be used in low and narrow spaces, and does not require the provision of numerous support points, in order to solve these problems. [Means for solving the problem]

[0007] This invention was made to achieve the above objective and is characterized by the following:

[0008] The invention described in claim 1 is a heavy object positioning device used for aligning heavy objects when installing them, comprising a jack for lifting the heavy object, The 1 Planar Member A rectangular holding member in a plan view that holds the object from above. and, A fixing member for fixing the jack onto the holding member, The device comprises a second planar member having an upper surface that is in surface contact with the lower surface of the first planar member, and a moving member that moves the first planar member and the jack horizontally on the second planar member, The first planar member is fitted into a rectangular recess formed on the lower surface of the retaining member, with walls on all four sides, such that its lower surface protrudes below the walls, and the movable member is a set of four bolts that can independently push in the walls on all four sides of the retaining member from the outside in a plan view. The lower surface of the first planar member is made of engineering plastic or steel, and the upper surface of the second planar member is made of engineering plastic or steel.

[0009] The invention described in claim 2 is a heavy object positioning device as described in claim 1, characterized in that the engineering plastic is any of monomer cast nylon (MC), polyacetal (POM), ultra-high molecular weight polyethylene (UHPE), or fluororesin (PTFE).

[0010] The invention described in claim 3 is a heavy object positioning device according to claim 1 or 2, characterized in that the steel material is any one of stainless steel, carbon steel, copper, or a copper-based alloy coated with a thermal spray coating.

[0011] The invention described in claim 4 is a heavy object positioning device as described in claim 1, characterized in that the contact surface of the steel material with the engineering plastic has a surface roughness of Ra 0.1 μm or less.

[0012] The invention described in claim 5 is a heavy object positioning device as described in claim 1, characterized in that a lubricant is applied to the contact surface between the first planar member and the second planar member.

[0014] Claim 6 The invention described is a method for adjusting the position of a heavy object using a heavy object position adjustment device, which is used for aligning heavy objects when installing them, wherein the position adjustment device includes a jack for lifting the heavy object, The 1 Planar Member A rectangular holding member in a plan view that holds the object from above. and, A fixing member for fixing the jack onto the holding member, The device comprises a second planar member having an upper surface that is in surface contact with the lower surface of the first planar member, and a moving member that moves the first planar member and the jack horizontally on the second planar member, The first planar member is fitted into a rectangular recess formed on the lower surface of the retaining member, with walls on all four sides, such that its lower surface protrudes below the walls, and the movable member is a set of four bolts that can independently push in the walls on all four sides of the retaining member from the outside in a plan view. The lower surface of the first planar member is made of engineering plastic or steel, and the upper surface of the second planar member is made of engineering plastic or steel. The process includes: a temporary placement step of transporting the heavy object to the installation position of the heavy object and temporarily placing the heavy object on a temporary support stand; an installation step of installing the position adjustment device below the jack contact portion of the temporarily placed heavy object to which the jack contacts; a lifting step of lifting the heavy object by pushing up the jack contact portion with the jack and transferring the load of the heavy object from the temporary support stand to the jack; and, with the heavy object lifted by the jack, adjusting the position of the heavy object so that it aligns with the installation position. boltA moving step of moving the jack horizontally using the same, and a placing step of lowering the heavy object by the jack and placing it at the installation position, characterized by including these steps.

Effect of the Invention

[0015] According to this invention, the frictional force on the surface where the second planar member and the first planar member are in surface contact can be reduced, and while the heavy object is lifted by the jack, the moving member can slide the first planar member and the jack on the second planar member on a horizontal plane. Further, since the position adjusting device is configured to slide the jack on a horizontal plane and is simple with steel plates and engineering plastics, it is less likely to fail, can suppress maintenance costs and installation costs, can be used even in low and narrow places, and there is no need to prepare a large number of support points.

Brief Explanation of the Drawings

[0016] [Figure 1] It is a plan view showing the heavy object 50 and the position adjusting device 1 in this embodiment. [Figure 2] It is a plan view of the position adjusting device 1 in this embodiment. [Figure 3] It is a cross-sectional view taken along the line A-A of the position adjusting device 1 in this embodiment. [Figure 4] It is a flowchart showing a method for adjusting the position of the heavy object 50 using the position adjusting device 1 in this embodiment.

Mode for Carrying Out the Invention

[0017] Referring to the drawings, embodiments of this invention will be described. First, a method for installing the heavy object 50 in this embodiment will be described.

[0018] In the method for installing the heavy object 50 in this embodiment, first, a temporary conveying rail is installed from the conveying source of the heavy object 50 to the installation position. The heavy object 50 is placed on a trolley running on the conveying rail and conveyed from the conveying source to the installation position. After the heavy object 50 is conveyed to the installation position, the heavy object 50 is jacked up, the load is transferred to a temporary support base arranged under the heavy object 50, and then the conveying rail and the trolley are removed.

[0019] Next, as shown in FIG. 1, the heavy object 50 is jacked up by lifting the contact portion 52 of the heavy object 50 with the hydraulic jack 10 provided on the upper part of the position adjusting device 1. Specifically, a plurality of position adjusting devices 1 are prepared corresponding to each of the contact portions 52 projecting outwardly on the outer surface of the heavy object 50. Then, the heavy object 50 is jacked up by simultaneously lifting the contact portions 52 with the hydraulic jacks 10 in the plurality of position adjusting devices 1.

[0020] Next, in the state where the load of the heavy object 50 is applied to each position adjusting device 1, the position of the hydraulic jack 10 is adjusted by sliding it on the horizontal plane, and the heavy object 50 is moved to the installation position. At this time, it is preferable to simultaneously perform the position adjustment of the hydraulic jacks 10 in each position adjusting device 1.

[0021] After the heavy object 50 is moved to the installation position, the heavy object 50 is jacked down by the hydraulic jack 10, the heavy object 50 is fixed with a fixture installed at the installation position, and the position adjusting device 1 is removed.

[0022] Next, the position adjusting device 1 for the heavy object 50 in this embodiment will be described with reference to FIGS. 2 and 3. FIG. 2 is a plan view of the position adjusting device 1 in this embodiment. FIG. 3 is a sectional view taken along the line A-A of FIG. 2. However, for the sake of explanation, FIG. 3 depicts the main body portion 51 of the heavy object 50 and the contact portion 52 that are not depicted in FIG. 2.

[0023] As shown in Figures 2 and 3, the position adjustment device 1 for the heavy object 50 in this embodiment includes a base 2 in plan view which is arranged so as to include the position of the hydraulic jack 10 when the position of the heavy object 50 coincides with the installation position when viewed from above; a first sliding member 3 in plan view which is fixed to the center of the upper surface of the base 2; a second sliding member 4 in plan view which is also rectangular and has a lower surface that is in surface contact with the upper surface of the first sliding member 3; a holding member 5 in plan view which is also rectangular and holds the second sliding member 4 from above; a fixing member 6 which fixes the hydraulic jack 10 on the holding member 5; four push bolts 8 which can push in from the outside each of the four sides of the holding member 5 when viewed from above; mounting members 7 which fix each of the push bolts 8 to the base 2; and a hydraulic jack 10.

[0024] For the base 2, for example, a steel plate such as a stainless steel (SUS) plate can be used.

[0025] For the first sliding member 3, a steel plate such as a stainless steel (SUS) plate can be used. In addition to stainless steel, other materials such as steel coated with a copper-based alloy thermal spray coating, carbon steel, and copper can be used as the material of the steel plate. Furthermore, it is preferable that the surface (upper surface) of the first sliding member 3 that is in surface contact with the second sliding member 4 has a surface roughness of Ra 0.1 μm or less. The first sliding member 3 only needs to use these steel materials on the surface that is in surface contact with the second sliding member 4, and other materials may be used for members other than the contact surface.

[0026] For the second sliding member 4, a plate-shaped engineering plastic such as monomer cast nylon sheet (for example, "MC901" manufactured by Mitsubishi Chemical Advanced Materials Corporation) can be used. Among engineering plastics, high-performance plastics suitable for structural and mechanical components, mainly used in industrial applications, with good heat abrasion resistance and a dynamic friction coefficient of about 0.05 to 0.2 are preferred. For example, monomer cast nylon (MC), polyacetal (POM), ultra-high molecular weight polyethylene (UHPE), and fluororesin (PTFE) can be used for the second sliding member 4.

[0027] It is preferable that the surface (bottom surface) of the second sliding member 4 that makes surface contact with the first sliding member 3 be processed to have the lowest possible coefficient of friction. Note that the second sliding member 4 only needs to be made of engineering plastic on the surface that makes surface contact with the first sliding member 3; other materials may be used for parts other than the contact surface.

[0028] By using these materials for the first sliding member 3 and the second sliding member 4, the frictional resistance at the surface where the first sliding member 3 and the second sliding member 4 are in surface contact is reduced. As a result, the frictional resistance at the surface where the first sliding member 3 and the second sliding member 4 are in surface contact is reduced to less than the frictional resistance at the upper surface in contact with the contact portion 52 on the hydraulic jack 10 side and the lower surface in contact with the hydraulic jack 10 on the contact portion 52 side.

[0029] In this example, the contact surface on the first sliding member 3 side is made of steel plate and the contact surface on the second sliding member 4 side is made of plate-shaped engineering plastic. However, these can be reversed, with the contact surface on the first sliding member 3 side being made of plate-shaped engineering plastic and the contact surface on the second sliding member 4 side being made of steel plate. Alternatively, both the contact surfaces on the first sliding member 3 side and the contact surfaces on the second sliding member 4 side may be made of steel plate. Furthermore, both the contact surfaces on the first sliding member 3 side and the contact surfaces on the second sliding member 4 side may be made of plate-shaped engineering plastic.

[0030] It is preferable to apply a lubricant 11, such as a conventionally known lubricating oil, to the portion where the first sliding member 3 and the second sliding member 4 make surface contact, in order to facilitate sliding.

[0031] The material used for the retaining member 5 can be, for example, carbon steel or stainless steel (SUS). A recess is formed on the lower surface of the retaining member 5 into which the second sliding member 4 is fitted. The recess is deep enough so that when the second sliding member 4 is fitted, the lower surface of the second sliding member 4 protrudes downward. This allows the first sliding member 3 and the second sliding member 4 to make surface contact. The recess is rectangular in shape and has walls on all four sides.

[0032] For example, carbon steel or stainless steel (SUS) can be used as the material for the fixing member 6. The fixing member 6 secures the hydraulic jack 10 which is placed on the holding member 5.

[0033] For example, carbon steel or stainless steel (SUS) can be used as the material for the mounting member 7 and the push bolts 8. The four push bolts 8 are fixed by the mounting member 7 so that their tips contact each side when the holding member 5 is viewed from above. The mounting member 7 is tapped for the push bolts 8, and by rotating the push bolts 8, the holding member 5 and the hydraulic jack 10 or heavy object 50 on it are slid along the horizontal plane. When one side of the holding member 5 is pushed by the push bolts 8 when viewed from above, the push bolts 8 on the other opposing side cannot move the holding member 5 if they remain as they are, so they are moved outwards.

[0034] The hydraulic jack 10 installed on the position adjustment device 1 only needs to be able to be fixed on the holding member 5 and be able to lift the heavy object 50 together with the hydraulic jack 10 of the other position adjustment device 1. For example, conventionally known jacks such as the ET type power jack from Osaka Jack Manufacturing Co., Ltd. can be used.

[0035] Next, using Figure 4, we will explain how to adjust the position of a heavy object 50 using the position adjustment device 1.

[0036] First, the heavy object 50 is transported to its installation location and temporarily placed on a temporary support stand (not shown) (an example of the "temporary placement process") (Step S1). The heavy object 50 is transported, for example, by placing it on rollers (not shown) or on a trolley (not shown) that runs on transport rails (not shown). The temporary support stand is installed between the lower part of the main body 51 of the heavy object 50 and the ground, and supports the load of the heavy object 50. At this stage, it is difficult for the position of the heavy object 50 to perfectly coincide with the installation location, so fine adjustments are made in the next step and beyond so that the position of the heavy object 50 perfectly coincides with the installation location.

[0037] Next, the position adjustment device 1 is installed below the contact portion 52 (an example of a "jack contact portion") where the hydraulic jack 10 of the heavy object 50, which is temporarily placed on the temporary support frame, makes contact (an example of an "installation process") (step S2).

[0038] Next, the contact portion 52 is pushed up by the hydraulic jack 10 to lift the heavy object 50, transferring the load of the heavy object 50 from the temporary support stand to the hydraulic jack 10 (an example of the "lifting process") (step S3).

[0039] Next, with the heavy object 50 lifted by the hydraulic jack 10, the hydraulic jack 10 is moved horizontally using a push bolt 8 (an example of a "moving member") so that the position of the heavy object 50 coincides with the installation position (an example of a "moving process") (step S4).

[0040] Next, the heavy object 50 is lowered using the hydraulic jack 10 and placed in the installation position (an example of the "placement process") (step S5).

[0041] As described above, the position adjustment device 1 for the heavy object 50 of this embodiment is used for positioning the heavy object 50 when installing it, and comprises a hydraulic jack 10 (an example of a "jack") for lifting the heavy object 50, a second sliding member 4 (an example of a "first planar member") provided on the lower surface of the hydraulic jack 10 via a holding member 5, a first sliding member 3 (an example of a "second planar member") having an upper surface that is in surface contact with the lower surface of the second sliding member 4, and a push bolt 8 (an example of a "moving member") for moving the second sliding member 4 and the hydraulic jack 10 in the horizontal direction on the first sliding member 3, wherein one of the lower surface of the second sliding member 4 and the upper surface of the first sliding member 3 is made of engineering plastic and the other is made of steel.

[0042] Therefore, according to the position adjusting device 1 of the heavy object 50 in this embodiment, the frictional force on the surface where the first sliding member 3 and the second sliding member 4 are in surface contact can be reduced. While the heavy object 50 is lifted by the hydraulic jack 10, the first sliding member 3 can be slid horizontally on the second sliding member 4 and the hydraulic jack 10 by the force of the push bolt 8. In addition, since the position adjusting device 1 is configured to slide the hydraulic jack 10 horizontally, it is composed of a steel plate and engineering plastic, which is simple, less prone to failure, can suppress maintenance costs and installation costs, can be used even in low and narrow places, and there is no need to prepare a large number of support points.

Explanation of Reference Numerals

[0043] 1: Position adjusting device 2: Base 3: First sliding member 4: Second sliding member 5: Holding member 6: Fixed member 7: Mounting member 8: Push bolt 10: Hydraulic jack 11: Lubricant 50: Heavy object 51: Main body part 52: Contact part

Claims

1. A device for adjusting the position of heavy objects, used for aligning heavy objects when installing them. A jack for lifting the aforementioned heavy object, A rectangular holding member in a plan view holds the first planar member from above, A fixing member for fixing the jack onto the holding member, A second planar member having an upper surface that is in surface contact with the lower surface of the first planar member, A moving member that moves the first planar member and the jack horizontally on the second planar member, Equipped with, The first planar member is fitted into a rectangular recess formed on the lower surface of the retaining member, the recess having walls on all four sides, with its lower surface protruding below the walls. The movable member is a set of four bolts that can independently push into the walls of the four sides of the holding member in a plan view from the outside. The lower surface of the first planar member is made of engineering plastic or steel. A device for adjusting the position of heavy objects, characterized in that the upper surface of the second planar member is made of engineering plastic or steel.

2. A device for adjusting the position of a heavy object according to claim 1, The engineering plastic is one of monomer cast nylon (MC), polyacetal (POM), ultra-high molecular weight polyethylene (UHPE), or fluororesin (PTFE). A distinctive feature is the device for adjusting the position of heavy objects.

3. A device for adjusting the position of a heavy object according to claim 1 or 2, The heavy object positioning device is characterized in that the steel material is one of stainless steel, carbon steel, copper, or a copper-based alloy coated with a thermal spray coating.

4. A device for adjusting the position of a heavy object according to claim 1, A heavy object positioning device characterized in that the contact surface of the steel material with the engineering plastic has a surface roughness of Ra 0.1 μm or less.

5. A device for adjusting the position of a heavy object according to claim 1, A device for adjusting the position of heavy objects, characterized in that a lubricant is applied to the contact surface between the first planar member and the second planar member.

6. A method for adjusting the position of a heavy object using a heavy object positioning device, which is used for aligning heavy objects when installing them. The position adjustment device is, A jack for lifting the aforementioned heavy object, A rectangular holding member in a plan view holds the first planar member from above, A fixing member for fixing the jack onto the holding member, A second planar member having an upper surface that is in surface contact with the lower surface of the first planar member, A moving member that moves the first planar member and the jack horizontally on the second planar member, Equipped with, The first planar member is fitted into a rectangular recess formed on the lower surface of the retaining member, the recess having walls on all four sides, with its lower surface protruding below the walls. The movable member is a set of four bolts that can independently push into the walls of the four sides of the holding member in a plan view from the outside. The lower surface of the first planar member is made of engineering plastic or steel. The upper surface of the second planar member is made of engineering plastic or steel. A temporary placement step involves transporting the heavy object to the installation location of the heavy object and temporarily placing the heavy object on a temporary support stand. Installation step: Install the position adjustment device below the jack contact portion of the temporarily placed heavy object to which the jack contacts, A lifting step in which the jack pushes up the jack contact portion to lift the heavy object and transfers the load of the heavy object from the temporary support stand to the jack, A moving step in which, with the heavy object lifted by the jack, the jack is moved horizontally using the bolt so that the position of the heavy object coincides with the installation position, The process of lowering the heavy object using the jack and placing it in the installation position, A method for adjusting the position of a heavy object, characterized by including the following:

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