Position adjustment device of heavy object and position adjustment method of heavy object

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] The present invention relates to a position adjustment device for adjusting the position of a heavy object when the object is to be installed at a predetermined installation position. [Background technology]

[0002] When installing heavy equipment such as condensers used in power plants at a designated location, the conventional installation method involves transporting the heavy equipment to the installation location by placing it on rollers or on a cart that runs on a transport rail, then hoisting it with a chain block and having workers repeatedly make fine adjustments while applying external force to install the heavy equipment at the installation location. This required a long time for installation, and was dangerous because it involved hoisting a heavy equipment.

[0003] Under such circumstances, Patent Document 1 discloses a position adjustment assistance device used for adjusting the position of a heavy object. The position adjustment assistance device includes an actuator body that expands and contracts vertically, and a spherical contact bearing that is provided on the lower surface of the actuator body and is freely movable within a horizontal plane, and can easily move the heavy object horizontally while lifting it. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2007-261739 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, the position adjustment support device of Patent Document 1 has problems such as being prone to mechanical failure and high maintenance costs because the actuator body and heavy objects are supported by bearings.In addition, there are problems such as the device itself being heavy because it includes bearings, which requires time for installation and a lot of equipment (materials), which can lead to high costs, the height of the device itself being high because it includes bearings, which requires supporting heavy objects at a high position, and the need to prepare multiple support points such as receiving points for the actuator and receiving points for the adjustment bolt.

[0006] Therefore, the object of the present invention is to provide a position adjustment device for a heavy object that is less likely to break down, has reduced maintenance and installation costs, can be used in low and narrow spaces, and does not require the preparation of multiple support points, in order to solve these problems. [Means for solving the problem]

[0007] The present invention has been made to achieve the above object and has the following features.

[0008] The invention described in claim 1 is a position adjustment device for a heavy object used for aligning a heavy object when installing it, comprising: a jack for lifting the heavy object; a first planar member provided on the underside of the jack; a second planar member having an upper surface in surface contact with the underside of the first planar member; and a moving member for moving the first planar member and the jack horizontally on the second planar member, wherein the underside 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 weight adjustment device described in claim 1, characterized in that the engineering plastic is any one 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 weight position adjustment device described in claim 1 or 2, characterized in that the steel material is one of stainless steel, carbon steel, and one coated with a thermal spray coating of copper or a copper-based alloy.

[0011] The invention described in claim 4 is the weight adjustment device 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 weight position adjustment device described in claim 1, characterized in that a lubricant is applied to the contact surfaces between the first planar member and the second planar member.

[0013] The invention recited in claim 6 is the weight position adjustment device recited in claim 1, characterized in that the moving member is a bolt.

[0014] The invention described in claim 7 is a method for adjusting a position of a heavy object using a position adjustment device for a heavy object used for aligning a position when installing the heavy object, the position adjustment device comprising: a jack for lifting the heavy object; a first planar member provided on the underside of the jack; a second planar member having an upper surface that is in surface contact with the underside of the first planar member; and a moving member for moving the first planar member and the jack in a horizontal direction on the second planar member, the underside of the first planar member being made of engineering plastic or steel, the upper surface of the second planar member being made of engineering plastic or steel, and the heavy object being transported to an installation position of the heavy object. The method includes a temporary placement process of temporarily placing the heavy object on a temporary support stand; an installation process of installing the position adjustment device below a jack abutment portion of the temporarily placed heavy object with which the jack abuts; a lifting process of lifting the heavy object by pushing up the jack abutment portion with the jack, thereby transferring the load of the heavy object from the temporary support stand to the jack; a moving process of moving the jack horizontally using the moving member while the heavy object is lifted by the jack so that the position of the heavy object coincides with the installation position; and a placement process of lowering the heavy object with the jack and placing it at the installation position. Effect of the Invention

[0015] According to this invention, it is possible to reduce the frictional force on the surface where the second planar member and the first planar member are in surface contact, and while the heavy object is being lifted by the jack, the first planar member and the jack can be slid on a horizontal plane on the second planar member by the moving member. In addition, since the position adjustment device has a simple structure for sliding the jack on a horizontal plane, using steel plates and engineering plastics, it is less likely to break down, maintenance costs and installation costs can be reduced, it can be used in low and narrow places, and there is no need to prepare many support points. [Brief description of the drawings]

[0016] [Figure 1] FIG. 2 is a plan view showing a weight 50 and a position adjustment device 1 in the present embodiment. [Diagram 2] FIG. 1 is a plan view of a position adjustment device 1 in the present embodiment. [Diagram 3] 2 is a cross-sectional view taken along line AA of the position adjustment device 1 in the present embodiment. FIG. [Figure 4] 4 is a flowchart showing a method for adjusting the position of a weight 50 using the position adjustment device 1 in the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] An embodiment of the present invention will be described with reference to the drawings. First, a method for installing a weight 50 in this embodiment will be described.

[0018] In the method of installing the heavy object 50 in this embodiment, first, a transport rail is temporarily installed from the transport origin of the heavy object 50 to the installation position, and the heavy object 50 is loaded onto a dolly that runs on the transport rail and transported from the transport origin to the installation position. After the heavy object 50 is transported to the installation position, the heavy object 50 is jacked up and the load is transferred to a temporary support stand arranged under the heavy object 50, and then the transport rail and dolly are removed.

[0019] 1, the heavy object 50 is jacked up by lifting the abutment parts 52 of the heavy object 50 with the hydraulic jack 10 provided on the upper part of the position adjustment device 1. Specifically, a plurality of position adjustment devices 1 are prepared corresponding to the abutment parts 52 protruding outward from the outer surface of the heavy object 50. Then, the hydraulic jacks 10 of the plurality of position adjustment devices 1 simultaneously lift the abutment parts 52 to jack up the heavy object 50.

[0020] Next, with the load of the heavy load 50 applied to each position adjustment device 1, the position of the hydraulic jack 10 is adjusted by sliding it on a horizontal plane, and the heavy load 50 is moved to the installation position. At this time, it is preferable that the position adjustment of the hydraulic jack 10 is performed simultaneously by each position adjustment device 1.

[0021] After the heavy load 50 has been moved to the installation position, the heavy load 50 is jacked down by the hydraulic jack 10, the heavy load 50 is fixed by a fixing device installed at the installation position, and the position adjustment device 1 is removed.

[0022] Next, the position adjustment device 1 for a weight 50 in this embodiment will be described with reference to Fig. 2 and Fig. 3. Fig. 2 is a plan view of the position adjustment device 1 in this embodiment. Fig. 3 is a cross-sectional view taken along line AA in Fig. 2. However, for the sake of explanation, Fig. 3 depicts a main body 51 and a contact portion 52 of the weight 50, which are not depicted in Fig. 2.

[0023] As shown in Figures 2 and 3, the position adjustment device 1 for a heavy load 50 in this embodiment includes a base 2 having a square shape in a plan view and arranged so as to include the position of the hydraulic jack 10 when the position of the heavy load 50 overlaps with the installation position when viewed in a plan view, a first sliding member 3 having a square shape in a plan view and fixed to the center of the upper surface of the base 2, a second sliding member 4 having a square shape in a plan view and having a lower surface in surface contact with the upper surface of the first sliding member 3, a holding member 5 having a square shape in a plan view and holding the second sliding member 4 from above, a fixing member 6 that fixes the hydraulic jack 10 onto the holding member 5, four pressing bolts 8 that can be pressed in from the outside into each of the four sides of the holding member 5 when viewed in a plan view, mounting members 7 that fix the pressing bolts 8 to the base 2, and the hydraulic jack 10.

[0024] The base 2 may be made of, for example, a steel plate such as a stainless steel (SUS) plate.

[0025] For the first sliding member 3, for example, a steel plate such as a stainless steel (SUS) plate can be used. In addition to stainless steel, for example, a plate coated with a thermal spray coating of a copper-based alloy, carbon steel, copper, etc. can be used as the material of the steel plate. In addition, it is preferable that the surface (upper surface) of the first sliding member 3 that comes into surface contact with the second sliding member 4 is finished to a surface roughness of Ra 0.1 μm or less. It is sufficient that the surface of the first sliding member 3 that comes into surface contact with the second sliding member 4 is made of these steel materials, and other materials may be used for the members other than the contact surface.

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

[0027] It is preferable that the surface (lower surface) of the second sliding member 4 that comes into surface contact with the first sliding member 3 is processed so as to have a friction coefficient as low as possible. Note that it is sufficient for the second sliding member 4 to use engineering plastics for the surface that comes into surface contact with the first sliding member 3, and other materials may be used for the members other than the contact surface.

[0028] Using these materials for the first sliding member 3 and the second sliding member 4 reduces the frictional resistance on the surface where the first sliding member 3 and the second sliding member 4 are in surface contact. This makes the frictional resistance on the surface where the first sliding member 3 and the second sliding member 4 are in surface contact smaller than the frictional resistance on the upper surface in contact with the abutment portion 52 on the hydraulic jack 10 side and the lower surface in contact with the hydraulic jack 10 on the abutment portion 52 side.

[0029] In addition, the contact surface on the first sliding member 3 side is made of a steel plate, and the contact surface on the second sliding member 4 side is made of a plate-shaped engineering plastic, but this may be reversed so that the contact surface on the first sliding member 3 side is made of a plate-shaped engineering plastic, and the contact surface on the second sliding member 4 side is made of a steel plate. Also, both the contact surface on the first sliding member 3 side and the contact surface on the second sliding member 4 side may be made of a steel plate. Furthermore, both the contact surface on the first sliding member 3 side and the contact surface on the second sliding member 4 side may be made of a 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 come into surface contact with each other, so as to facilitate sliding.

[0031] The material of the holding member 5 may be, for example, carbon steel or stainless steel (SUS). A recess is formed on the bottom surface of the holding member 5 into which the second sliding member 4 is fitted. The recess is deep enough that the bottom surface of the second sliding member 4 protrudes downward when the second sliding member 4 is fitted. This allows the first sliding member 3 and the second sliding member 4 to come into surface contact. The recess is also rectangular with walls formed on all four sides.

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

[0033] The mounting member 7 and the pressing bolts 8 can be made of, for example, carbon steel or stainless steel (SUS). The four pressing bolts 8 are fixed by the mounting member 7 so that their tips abut against the respective sides of the holding member 5 when viewed in plan. The mounting member 7 is tapped for the pressing bolts 8, and by rotating the pressing bolts 8, the holding member 5 and the hydraulic jack 10 and weight 50 placed thereon are slid along a horizontal plane. When pressing one side of the holding member 5 when viewed in plan with the pressing bolts 8, the pressing bolts 8 on the opposing other sides cannot move the holding member 5 if left as they are, so they are moved outward.

[0034] The hydraulic jack 10 installed on the position adjustment device 1 must be capable of being fixed onto the holding member 5 and capable of lifting a heavy object 50 together with the hydraulic jack 10 of another position adjustment device 1; for example, a conventionally known jack such as the ET type power jack manufactured by Osaka Jack Manufacturing Co., Ltd. can be used.

[0035] Next, a method for adjusting the position of the weight 50 using the position adjustment device 1 will be described with reference to FIG.

[0036] First, the heavy object 50 is transported to the installation position of the heavy object 50, and the heavy object 50 is temporarily placed on a temporary support stand (not shown) (an example of a "temporary placement process") (step S1). The heavy object 50 is transported, for example, by placing the heavy object 50 on rollers (not shown) or on a cart (not shown) that runs on a transport rail (not shown). The temporary support stand is installed between the bottom of the main body 51 of the heavy object 50 and the ground, and receives the load of the heavy object 50. Note that at this stage, it is difficult for the position of the heavy object 50 to perfectly match the installation position, and fine adjustments are made in the next step and subsequent steps so that the position of the heavy object 50 perfectly matches the installation position.

[0037] Next, the position adjustment device 1 is installed below the abutment portion 52 (an example of a "jack abutment portion") of the heavy object 50 temporarily placed on the temporary support stand, with which the hydraulic jack 10 abuts (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 weight 50, and the load of the weight 50 is transferred from the temporary support stand to the hydraulic jack 10 (an example of a "lifting step") (step S3).

[0039] Next, with the heavy load 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 load 50 matches the installation position (an example of a "moving process") (step S4).

[0040] Next, the heavy load 50 is lowered by the hydraulic jack 10 and placed at the installation position (an example of a "placing step") (step S5).

[0041] As described above, the position adjustment device 1 for a heavy object 50 in this embodiment is used for aligning 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 underside of the hydraulic jack 10 via a retaining member 5, a first sliding member 3 (an example of a "second planar member") having an upper surface in surface contact with the underside 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 horizontally on the first sliding member 3, and one of the underside 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 device 1 for adjusting the position of a heavy load 50 of this embodiment, it is possible to reduce the frictional force on the surface where the first sliding member 3 and the second sliding member 4 are in surface contact, and while the heavy load 50 is held up by the hydraulic jack 10, the force of the pressing bolt 8 can cause the second sliding member 4 and the hydraulic jack 10 to slide on a horizontal plane on the first sliding member 3. Furthermore, since the position adjustment device 1 has a simple structure for sliding the hydraulic jack 10 on a horizontal plane, using steel plates and engineering plastics, it is less likely to break down, maintenance costs and installation costs can be reduced, it can be used in low and narrow places, and there is no need to prepare many support points. [Explanation of symbols]

[0043] 1:Position adjustment device 2: Foundation 3: First sliding member 4: Second sliding member 5: Holding member 6: Fixing member 7: Mounting material 8: Push bolt 10: Hydraulic jack 11: Lubricants 50: Heavy objects 51: Main body 52: Contact part

Claims

1. A weight position adjustment device used for aligning a weight when installing the weight, comprising: A jack for lifting the heavy object; A first planar member provided on a lower surface of the jack; a second planar member having an upper surface in surface contact with the lower surface of the first planar member; a moving member for moving the first planar member and the jack horizontally on the second planar member; Equipped with the lower surface of the first planar member is made of engineering plastic or steel; A position adjustment device for a heavy object, wherein the upper surface of the second planar member is made of engineering plastic or steel.

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

3. The weight position adjustment device according to claim 1 or 2, 2. A position adjustment device for a heavy load, wherein the steel material is any one of stainless steel, carbon steel, and those coated with a thermal spray coating of copper or a copper-based alloy.

4. The weight position adjustment device according to claim 1, A position adjustment device for a heavy load, wherein the contact surface of the steel material with the engineering plastic has a surface roughness of Ra 0.1 μm or less.

5. The weight position adjustment device according to claim 1, A position adjustment device for a heavy object, characterized in that a lubricant is applied to the contact surfaces of the first planar member and the second planar member.

6. The weight position adjustment device according to claim 1, 4. The apparatus for adjusting the position of a heavy object, wherein the movable member is a bolt.

7. A method for adjusting a position of a weight object using a weight object position adjustment device used for aligning a weight object when installing the weight object, comprising the steps of: The position adjustment device is A jack for lifting the heavy object; A first planar member provided on a lower surface of the jack; a second planar member having an upper surface in surface contact with the lower surface of the first planar member; a moving member for moving the first planar member and the jack horizontally on the second planar member; Equipped with 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 process of transporting the heavy object to an installation position of the heavy object and temporarily placing the heavy object on a temporary support stand; an installation process of installing the position adjustment device below a jack abutment portion of the temporarily placed heavy object with which the jack abuts; a lifting process of lifting the heavy object by pushing up the jack abutment portion with the jack, and transferring the load of the heavy object from the temporary support stand to the jack; a moving step of moving the jack in a horizontal direction using the moving member while the heavy object is lifted by the jack so that the position of the heavy object coincides with the installation position; a placing step of lowering the heavy object by the jack and placing it at the installation position; A method for adjusting a position of a weight, comprising:

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