JP2024126765A - Mat installation tool and electrical device installation method - Google Patents

Abstract

To solve conventional problems, namely, to provide a map installation jig capable of installing a vibration insulating map more safely between an electric device and a floor surface, and an electric device installation method.SOLUTION: A mat installation jig 200 comprises a first magnet 211 provided on an inner surface of a main body wall 221 and a second magnet 212 for attaching a vibration insulating map detachably. The mat installation jig 200 mounted with the vibration insulating mat can be installed at a lower end of an electric device with the first magnet 211 by bringing the inner surface of the main body wall 221 into contact with a side face of the electric device, and then the map installation jig 200 can be detached from the vibration insulating map with the vibration insulating mat left between the electronic device and the floor surface.SELECTED DRAWING: Figure 5

Description

This invention relates to technology related to a mat installation tool that can be used when replacing electrical equipment (e.g., a transformer) installed indoors, and more specifically, to a mat installation tool that can more safely install an anti-vibration mat between the electrical equipment and the floor surface, and a method using the same.

Traditionally, products using polychlorinated biphenyls (PCBs) have been used in a variety of products, from transformers in buildings and railway vehicles to fluorescent light ballasts and capacitors for home appliances such as microwave ovens. However, PCBs are difficult to decompose, being poorly soluble in water and having a high boiling point. In addition, because they are substances that may cause damage to human health and the living environment, new production and import of PCBs is currently prohibited.

Representative electrical equipment that uses PCBs includes products necessary for the supply of electricity, such as high-voltage transformers (hereafter referred to as "transformers"). Furthermore, this type of product is required to be properly disposed of within a specified period of time, based on the Special Measures Law Concerning the Promotion of Proper Treatment of Polychlorinated Biphenyl Waste. For example, it is mandatory to replace transformers that use PCBs, and work is being carried out daily to replace all of the many transformers that are subject to replacement under this law.

In the installation work of installing a new transformer after discarding the transformer to be replaced, for example, as shown in FIG. 8, a dolly B transports a transformer C to the installation position, inserts a square timber under the transformer C so that the transformer C is supported by the square timber, and then pulls out the dolly B. The position and orientation of the transformer C are then adjusted, and the transformer C is lifted one side at a time and an anti-vibration mat M is attached to the underside of the transformer C. The installation work is then completed by fixing an anchor fitting A to the bottom of the transformer C. The transformer is so heavy that it is difficult to lift one side without multiple people supporting it from both sides to prevent it from falling over, and there is a concern that if the workers do not communicate well with each other, there is a risk of an accident such as a hand or foot being caught under the transformer. Because the transformer is so heavy, for example, Patent Document 1 proposes a method of lifting the transformer by transporting it with a crane.

JP 2012-165579 A

However, many of the transformers to be replaced are installed in facilities such as apartment complexes, office buildings, and hospitals, and are often installed in small, dedicated supply transformer rooms (so-called rented rooms) within these facilities. This means that the installation work of the transformers is forced to be done in a space that is insufficient, and there is a problem that it is often dangerous work that depends on the experience and skill of the workers, such as one worker lifting the target product while another attaches an anti-vibration mat to the underside of the target product. Furthermore, this type of problem is not limited to transformers, and can be a common problem with other electrical equipment installed indoors, such as generators.

The objective of the present invention is to solve the problems of the past, that is, to provide a mat installation tool and an electrical equipment installation method that can install an anti-vibration mat between an electrical device and a floor surface more safely than in the past.

The present invention focuses on the point that an anti-vibration mat is installed between the electrical equipment and the floor surface by using a mat installation jig that is detachable from both the electrical equipment and the anti-vibration mat, and is an invention based on an idea that has not been seen before.

The mat installation jig of the present invention is a jig for installing an anti-vibration mat below an electrical device such as a transformer or generator installed indoors, and includes a main body wall and an attachment means. The main body wall has a first magnet on its inner surface, and the attachment means is for removably attaching the anti-vibration mat. When the inner surface is brought into contact with the side of the electrical device, the main body wall is installed on the electrical device by the first magnet. Furthermore, when the main body wall is installed at the bottom end of the electrical device with the anti-vibration mat attached by the attachment means, a part (particularly half) of the anti-vibration mat is positioned below the electrical device. Then, after the electrical device is placed on the floor with a part (particularly half) of the anti-vibration mat positioned below the electrical device, the anti-vibration mat can be removed from the anti-vibration mat while leaving it in place.

The mat installation jig of the present invention may also have an attachment means constituted by a second magnet. This second magnet is provided on the bottom surface of the main body wall. In this case, due to the effect of providing the second magnet and the magnetic body, a part of the upper surface of the vibration-proof mat adheres to the bottom surface of the main body wall. This vibration-proof mat may be molded from a material containing a magnetic body, so that the magnetic body is provided, or the magnetic body may be provided by attaching a separate part (e.g., a plate) made of a magnetic material to the main body part that exhibits vibration-proofing performance.

The mat installation tool of the present invention may further include a cushioning material that covers the inner surface of the main body wall. In this case, the main body wall is configured to be able to be installed on the electrical device with the cushioning material interposed between the electrical device and the main body wall.

The mat installation tool of the present invention can also have a recess formed on the side of the main body wall into which a finger can be inserted.

The electrical equipment installation method of the present invention is a method for installing electrical equipment indoors using the mat installation jig of the present invention, and includes a mat mounting step, a lifting step, a jig installation step, a suspending step, and a jig removal step. In the mat mounting step, the vibration-proof mat is attached to the mat installation jig by the installation means, and in the suspending step, the electrical equipment is suspending. In the jig installation step, the mat installation jig with the vibration-proof mat attached is installed at the lower end of the electrical equipment so that a part (particularly half) of the vibration-proof mat is positioned below the suspended electrical equipment. In the suspending step, the electrical equipment is suspending and placing on the floor with a part (particularly half) of the vibration-proof mat positioned below the electrical equipment. In the jig removal step, after placing the electrical equipment on the floor, the mat installation jig is removed from the vibration-proof mat while leaving the vibration-proof mat in place.

The mat installation jig of the present invention has the following effects.
(1) The mat installation jig can be installed on the electrical equipment by grasping the main body wall and approaching it from the side, and the vibration-proof mat attached to the mat installation jig can be installed under the electrical equipment. This makes it possible to avoid work-related accidents such as hands being caught between the electrical equipment and the floor when placing the vibration-proof mat under the electrical equipment, and therefore makes it possible to install the electrical equipment more safely than with conventional techniques.
(2) Since the mat installation jig is attached to the electrical equipment using a magnet, the mat installation jig can be removed relatively easily. As a result, the mat installation jig can also be removed relatively easily from the vibration-proof mat installed underneath the electrical equipment.

FIG. Left side view of the lifting device. FIG. FIG. 1 is a step diagram showing the process of installing a transformer using a lifting device. 1A is a front view showing an example of a mat installation jig of the present invention, FIG. 1B is a perspective view of the mat installation jig seen from diagonally above the front, and FIG. 1C is a perspective view of the mat installation jig seen from diagonally below the front. FIG. 1A is a perspective view showing an example of a cushioning material attached to a mat installation jig; FIG. 1B is a perspective view showing a narrow vibration-proof mat attached to the mat installation jig; and FIG. 1C is a perspective view showing a wide vibration-proof mat attached to the mat installation jig. 1A is a partial front view showing the state in which a mat installation jig with an anti-vibration mat attached thereto is attached to a transformer, and FIG. 1B is a partial front view showing the state in which the mat installation jig has been removed from the transformer and the anti-vibration mat. FIG. 1 is a step diagram illustrating a conventional transformer installation process.

First, an overview of the present invention will be described. The present invention relates to a device that can safely install electrical equipment indoors. More specifically, it is a technology that can safely install electrical equipment by using a "lifting device" that is suitable for installing electrical equipment in small rooms, and a "mat installation jig" that allows a vibration-proof mat to be safely installed between the electrical equipment and the floor surface. An example of an embodiment will be described below with reference to the drawings.

1. Lifting device First, the lifting device will be described in detail with reference to the drawings. The electrical equipment installation method of the present invention is a method of installing electrical equipment using the lifting device and the mat installation jig of the present invention. Therefore, the lifting device will be described first, then the electrical equipment installation method using the lifting device will be described, and then the lifting device and the electrical equipment installation method using the mat installation jig of the present invention will be described in detail.

1 and 2 are diagrams showing the entire lifting device 100. The lifting device 100 is a device for lifting electrical equipment installed indoors. The present invention can be applied to various electrical equipment, but for convenience, the case of lifting a transformer C as an electrical equipment will be described as an example. The lifting device 100 includes a first support leg 110, a second support leg 120, a top beam 130, a tensioner 140 as a hoisting means, pulleys (end pulleys 151, upper central pulley 152a, lower central pulley 152b, and lifting jig pulley 153), and a lifting jig 160. Below, each of the main elements constituting the lifting device 100 will be described in detail. For convenience, the axial direction in which the top beam 130 is arranged (left-right direction in FIG. 1) is referred to as the "left-right direction", and the horizontal direction perpendicular to the left-right direction (left-right direction in FIG. 2) is referred to as the "front-rear direction". The lifting device 100 can also be used to remove electrical equipment, not just install it, but for convenience, we will use the example of installing electrical equipment here.

(Two supporting legs and a beam)
The two support legs (first support leg 110 and second support leg 120) are arranged substantially vertically (including vertically), and a top beam 130 is attached to the upper part of the support legs to form a gate-shaped frame body. The first support leg 110, the second support leg 120, and the top beam 130 may be formed using a material having a considerable strength (for example, metal, resin, etc.). The top beam 130 shown in the figure shows an example in which the top beam 130 is arranged substantially horizontally (including horizontally) and supported by the first support leg 110 and the second support leg 120, and is fixed (integrated) to the first support leg 110 and the second support leg 120 using a fixing bolt 131 inserted from the upper side. Alternatively, in addition to (or instead of) the specification in which the fixing bolt 131 is inserted from the upper side, the fixing bolt 131 can be inserted from the lower side of the top beam 130.

The structure for fixing the beam 130 to the first support leg 110 and the second support leg 120 is not limited to the above, and may be another structure, such as using a screw or a lock pin inserted in the front-rear direction. However, it is preferable that the structure can be easily assembled and used during work and easily disassembled after work, and that the disassembly work can be performed manually without requiring special tools. In addition, it is preferable that at least one of the first support leg 110 and the second support leg 120 is configured so that the mounting position to the beam 130 can be selected from multiple positions (i.e., the mounting position is variable), and the width dimension of the gate-shaped space (the dimension in the left-right direction in FIG. 1) can be adjusted. For example, bolt holes may be provided at multiple positions, and the mounting position may be variable depending on the insertion position, or bolt holes in the shape of long holes continuing horizontally may be provided to enable stepless position adjustment.

As shown in Figures 1 and 2, the lower end portions of the first support leg 110 and the second support leg 120 are long in the front-rear direction (left-right direction in Figure 2) and are configured so that the lifting device 100 does not tip over forward or backward. Note that Figure 1 shows an example in which the first support leg 110 is a combination of a rod-shaped (or tubular) first main column 111 and a first reinforcing column 112 that is arranged vertically on the first main column and connected to the first main column 111 at multiple points, and similarly, the second support leg 120 is a combination of a rod-shaped (or tubular) second main column 121 and a second reinforcing column 122, but other structures, such as a single rod-shaped member, may be used depending on the maximum weight of the electrical equipment to be lifted. In addition, it is preferable that the first support leg 110 and the second support leg 120 are configured to be self-supporting even before the top beam 130 is attached. For example, as shown in FIG. 1, it is preferable that the right self-supporting member 113 and the left self-supporting member 123 that protrude in the left and right directions when viewed from the front can be attached.

(Hoisting Means)
The tensioning machine 140 is a winding means capable of winding up a flexible linear body (e.g., a wire harness formed by bundling a plurality of metal wires) as a main material 141, and is attached to the first support leg 110. The tensioning machine 140 is provided with a rotating body 142 around which one end of the main material 141 is wound, an operating unit 143 for rotating the rotating body 142, a ratchet mechanism, and a clutch mechanism. For example, the operating unit 143 shown in Figs. 1 and 2 includes an operating lever and a handle 144 held by an operator, one end of the operating lever is attached to the rotating body 142, and the handle 144 is provided at the other end of the operating lever. The ratchet mechanism is a mechanism for transmitting a rotational force in only one rotation direction by operating the operating unit 143 to swing within a certain range (e.g., the operating range from the solid line position to the position shown by the dashed line in Fig. 1). The clutch mechanism is a mechanism for switching between a locked state in which the rotating body 142 can rotate only in the direction in which the main material 141 is wound, and a released state in which the rotating body 142 can rotate in the opposite direction and the main material 141 is unwound. Note that the configuration of the wire tensioning machine 140 is not limited to the above, and other configurations may be used. For example, the position and orientation of the wire tensioning machine 140 are not limited to a configuration in which it can rotate around the front-to-rear direction shown in Figure 1, and it may also be configured to rotate around a central axis in another direction (for example, the left-to-right direction).

(pulley)
The lifting device 100 is configured by winding a main material 141 around a plurality of pulleys (end pulleys 151, upper central pulley 152a, lower central pulley 152b, and hoisting jig pulley 153). Specifically, the main material 141 of the wire tensioning machine 140 is wound around the end pulley 151 attached to the top of the wire tensioning machine 140 and the central pulley (upper central pulley 152a) attached to the middle of the top beam 130, and hangs down into a gate-shaped space formed under the top beam 130. A hoisting jig 160 is attached to the hanging main material 141.

(Hanging jig)
The hoisting jig 160 is configured to be capable of being engaged with a portion of the transformer C, and is a jig that enables the transformer C to be hoisted from above. The hoisting jig 160 is disposed in a gate-shaped space surrounded by the first support leg 110, the second support leg 120, and the top beam 130. The hoisting jig 160 rises when the wire tensioning machine 140 winds up (i.e., pulls) the main material 141 of the wire tensioning machine 140, and the hoisting jig 160 descends when the main material 141 is unwound (i.e., loosened).

The lifting jig pulley 153 can also be attached to the lifting jig 160. In this case, the main beam 141, which is wound around the upper central pulley 152a and hangs down, is wound around the lifting jig pulley 153 and faces upward, and the tip of the main beam 141 is fixed to the top beam 130. When lifting or lowering the transformer C, the lifting jig pulley 153 functions as a movable pulley, which is preferable because it allows the transformer C to be lifted with a small operating force.

If it is necessary to further reduce the operating force required to hoist the transformer C, it can also be used as a two-stage pulley using the lower central pulley 152b. In this case, as shown by the thin line in Figure 1, the main beam 141 that is wound around the hoisting jig pulley 153 and faces upward is not fixed to the top beam 130, but is further wound around the lower central pulley 152b and hung down, and its tip is fixed to the hoisting jig 160.

Figure 3 is a perspective view showing an example of a hoisting jig 160, specifically showing the hoisting jig 160 shown in simplified form in Figures 1 and 2. The hoisting jig 160 is composed of a lifting beam 161 arranged approximately horizontally (including horizontally) and two hoisting materials 162 attached to the lifting beam 161. In addition, a support body 163 is attached above the lifting beam 161, and the hanging main material 141 is wound around a hoisting jig pulley 153 supported by this support body 163, that is, the lifting beam 161 is attached to the main material 141 via the support body 163 (hoisting jig pulley 153). Note that FIG. 3 shows an example of a "hinge connection" in which the lift beam 161 is connected to the support 163 so as to be rotatable around a substantially vertical (including vertical) axis, but this is not limiting. For example, the lift beam 161 may be attached directly to the hanging main beam 141, or a hoisting jig pulley 153 may be attached to the lift beam 161.

The lifting material 162 is an example in which a belt is looped and is provided at two locations spaced apart in the horizontal direction. The position at which the lifting material 162 is attached to the lifting beam 161 can be fixed at one location, or can be adjustable in the left-right direction. For example, FIG. 3 shows an example in which mounting holes 164 are provided in two locations on each side of the lifting beam 161, allowing the worker to select the mounting location for the lifting material 162 and insert a lock pin 165 to fix it in place.

The lifting beam 161 and the hoisting material 162 may be set appropriately according to the type, shape, and size of the electrical device to be installed, and two or more types may be prepared and used interchangeably. For example, the number of hoisting materials 162 is not limited to two, but may be three or more. The lifting beam 161 does not have to be made up of a single rod-shaped body, and may be made up of a combination of two or more rod-shaped bodies, and the lifting beam 161 may be configured to be planar, so to speak, in an approximately triangular or rectangular shape when viewed from above.

2. Electrical Equipment Installation Method Using Lifting Device Next, an electrical equipment installation method using the lifting device 100 will be described in detail with reference to the drawings. The electrical equipment installation method is a method for installing electrical equipment using the lifting device 100 described so far. Therefore, explanations that overlap with the contents explained in the lifting device 100 will be avoided, and only the contents unique to the lifting device 100 will be explained. In other words, the contents not described here are the same as those explained in "1. Lifting device".

Figure 4 shows the process of installing transformer C. When installing transformer C, first, transformer C is placed on cart B and transported to the installation position, and lifting device 100 is installed to surround transformer C at the installation position, as shown in Figure 4 (a). After that, the height position of the lifting jig 160 (hanging material 162) of lifting device 100 is adjusted and the lifting jig 160 is engaged with the upper part of transformer C, making it possible to lift transformer C. Note that the lifting device 100 may be installed before transformer C is placed on cart B and transported to the installation position.

When the transformer C is ready to be lifted, as shown in FIG. 4(b), the wire tensioner 140 is operated to raise the transformer C, and the trolley B supporting the transformer C is pulled out. After that, as shown in FIG. 4(c), the orientation of the transformer C is adjusted, and a mat installation jig 200 integrated with an anti-vibration mat M is attached to the bottom end of the transformer C. Details of the mat installation jig 200 will be described later.

Once the mat installation jig 200 has been attached, the wire tensioner 140 is operated to lower the transformer C, and the vibration-proof mat M is placed on the floor surface, with the transformer C supported on the floor surface, as shown in Figure 4(d). The lifting device 100 is now no longer in use and can be removed. The vibration-proof mat M is sandwiched under the transformer C due to its weight, and the mat installation jig 200 is separated and removed from the vibration-proof mat M, as shown in Figure 4(e). Finally, anchor fittings A for fixing the transformer C to the floor surface are attached to the bottom of the transformer C, completing the installation of the transformer C.

As described above, according to the electrical equipment installation method using the lifting device 100, both the lifting and lowering of the transformer C during the installation work of the transformer C can be performed simply by operating the wire tensioner 140, and the transformer C can be installed by a single worker. Therefore, the installation work of the transformer C can be performed safely without relying on the skill of the worker.

As shown in FIG. 1 etc., the lifting device 100 is structured such that the lifting jig 160 is provided in a gate-shaped space surrounded by two support legs (first support leg 110 and second support leg 120) and the top beam 130, and the wire tensioner 140, end pulley 151, upper central pulley 152a, and lower central pulley 152b as the hoisting means are provided on the first support leg 110 or the top beam 130. For this reason, there is no need for a structure that protrudes significantly outward from the gate-shaped portion. Therefore, even in a small room where the transformer C is close to the wall and there is little space for work space, the gate-shaped lifting device 100 can be installed in that space.

Furthermore, the lifting device 100 has a simple structure with two support legs (first support leg 110 and second support leg 120) and a top beam 130 as its basic structure, and can be easily assembled and disassembled. For example, the dimensions of the portal space can be adjusted to correspond to the size of the electrical equipment. In addition, the lifting device 100 can be easily transported because it is easy to make it lightweight, and can be easily transported to a construction site even with a small work vehicle.

3. Mat Installation Jig Next, the mat installation jig 200 of the present invention will be described in detail with reference to Figures 5 and 6. The mat installation jig 200 can be used in the installation work of a transformer C, and is a jig for installing an anti-vibration mat M below a transformer C, such as a transformer C installed indoors. For convenience, the side of the mat installation jig 200 that is closer to the transformer C when the mat installation jig 200 is attached to the transformer C will be referred to as the "inside" and the opposite side as the "outside."

The mat installation jig 200 includes a main body 220, a first magnet 211, and a second magnet 212. The main body 220 is formed of synthetic resin (e.g., synthetic rubber), and a main body wall 221 is formed in the upper part of the main body 220, and a lower wall 222 can also be formed in the lower part (below the main body wall 221). The side of the main body wall 221 is formed with an inner surface 221a that is curved so that the center side is concave, and two first magnets 211 are provided on the inner surface 221a of the main body wall 221 (the surface that contacts the transformer C). By abutting the inner surface 221a of the main body wall 221 against the side of the transformer C whose outer surface is made of a magnetic material, the inner surface 221a of the main body wall 221 is attached (attracted) to the transformer C by the magnetic force of the first magnet 211. As a result, the mat installation jig 200 can be installed (attached) to the transformer C.

The second magnet 212 functions as a mounting means for removably attaching the anti-vibration mat M. Therefore, the anti-vibration mat M may be molded from a material containing a magnetic substance (e.g., a rubber material containing magnetic powder), or may have a metal plate or the like attached to its surface as a magnetic substance. The second magnet 212 is provided on the bottom surface 221b of the main body wall 221 as shown in FIG. 5(c), and the anti-vibration mat M and the mat installation jig 200 can be integrated by attaching a part of the upper surface of the anti-vibration mat M to the lower side of the main body wall 221.

When the vibration-proof mat M and the mat installation jig 200 are integrated, the vibration-proof mat M is set to a size (preferably a size that allows about half of the upper surface of the vibration-proof mat M to protrude) inward from the main body wall 221 (toward the front side of the paper in Figures 6 (b) and (c)). This allows a part (e.g., half) of the vibration-proof mat M to be attached and positioned below (particularly the bottom surface) the transformer C. Note that the second magnet 212 used as the attachment means can be a neodymium magnet, but other attachment means such as a detachable adhesive sheet for the vibration-proof mat M can also be used.

5 shows an example in which a lower wall 222 is provided below the main body wall 221, and one third magnet 213 is provided on the lower wall 222. The lower wall 222 is arranged on the outside of the main body wall 221 except for the bottom surface 221b, and one outer surface is formed so that the outer surface of the main body wall 221 and the outer surface of the lower wall 222 are continuous. The lower wall 222 and the third magnet 213 are not essential components, but as shown in Figures 6(b) and 6(c), when the vibration-proof mat M is installed below the main body wall 221, the lower wall 222 and the vibration-proof mat M are in contact (attached) by the third magnet 213, which can be used to position the vibration-proof mat M, and the third magnet 213 can stably support the vibration-proof mat M. Note that Figures 6(b) and 6(c) show examples in which the vibration-proof mat M installed using the mat installation jig 200 has different sizes. Even when using vibration-proof mats M of different sizes, the lower wall 222 is formed into a flat plate, allowing the use of a common mat installation jig 200.

6(a) shows an example in which the inner surface 221a of the main body wall 221 is covered with a thin-plate-shaped cushioning material 230. The cushioning material 230 may be, for example, a nonwoven fabric, and may be attached to the inner surface 221a with double-sided tape. This allows the main body wall 221 to be installed (magnetically attached) to the transformer C with the cushioning material 230 between the transformer C and the main body wall 221, and prevents the transformer C from being damaged by rubbing against the corners of the main body wall 221 or the first magnet 211. The magnetic force of the first magnet 211 can be adjusted by adjusting the thickness and number of the cushioning material 230. The cushioning material 230 may also be made of a material containing a magnetic substance, which allows the mat installation jig 200 to have an expanded range of magnetic force.

The body wall 221 is provided with recesses 221c that can be used by an operator to grip the mat installation jig 200. Specifically, the recesses 221c are formed on both the left and right sides of the body wall 221 (both sides in the left-right direction in FIG. 5) and are set to a depth that allows a finger to be inserted (for example, a depth of 1 cm or more). This allows the recesses 221c to be gripped with the fingertips, making it easier to carry the mat installation jig 200.

A portion (hereinafter referred to as the "thin plate portion") that is thinner than other portions can be formed near the center of the main body wall 221, and a through hole 221d can be further provided in the thin plate portion (particularly the upper portion). In this case, the mat installation jig 200 can be carried by pinching the thin plate portion with pliers or by engaging a hook-shaped tool with the through hole 221d. This makes it easier to remove the mat installation jig 200 toward the upper side even when the mat installation jig 200 is installed in a place with a narrow gap to the wall.

A groove 221e that continues in the vertical direction can also be provided on the inside of the main body wall 221. Welded areas (welding marks) may remain on the side of the transformer C, and in this case, for example, the weld bead may act as a barrier and the mat installation jig 200 may not completely adhere to the side of the transformer C. On the other hand, if a groove 221e is provided on the inside of the main body wall 221, the weld bead or the like can be accommodated in this groove 221e, meaning that even if welded areas remain on the transformer C, the mat installation jig 200 can be attached in close contact with the side.

4. Electrical Equipment Installation Method Using Mat Installation Jig Next, the electrical equipment installation method using the mat installation jig 200 of the present invention will be described in detail with reference to the drawings. Note that as an electrical equipment installation method, explanations that overlap with the contents explained using the lifting device 100 will be avoided, and only the contents specific to the case where the mat installation jig 200 is used will be explained.

When installing the transformer C, first, the vibration-proof mat M is attached to the mat installation jig 200 by the second magnet 212 as the mounting means (Fig. 6(b) and Fig. 6(c)). Then, the transformer C is lifted by the lifting device 100 so that a gap is created below the transformer C, and the mat installation jig 200 with the vibration-proof mat M attached is installed at the lower end of the transformer C (Fig. 7(a)). At this time, the mat installation jig 200 can be attached to the transformer C from the side by grasping the main body wall 221 (particularly the recess 221c) of the mat installation jig 200, and the installation position can also be fine-tuned. In addition, a part of the vibration-proof mat M protrudes inward (towards the transformer C) from the main body wall 221, and the mat installation jig 200 is installed so that the protruding part is positioned below the lifted transformer C.

A part (e.g., half) of the vibration-proof mat M is placed below the transformer C, and the transformer C is then hung and placed on the floor. The mat installation jig 200 is then removed from the transformer C and the vibration-proof mat M, leaving the vibration-proof mat M between the transformer C and the floor (Figure 7(b)). When removing the mat installation jig 200, the main body wall 221 of the mat installation jig 200 can be grasped to remove only the mat installation jig 200 from the side of the transformer C.

In this way, by using the mat installation jig 200 of the present invention when installing an electrical device such as a transformer C, the worker can install the vibration-proof mat M between the electrical device and the floor surface without having to reach under the electrical device. This makes it possible to avoid dangerous work such as getting one's hands caught between the electrical device and the floor surface when installing the vibration-proof mat M, and allows the electrical device to be safely installed while supported by the vibration-proof mat M.

The mat installation tool and electrical equipment installation method of the present invention can be particularly suitably used when replacing a large number of transformers based on the Special Measures Law Concerning the Promotion of Proper Treatment of Polychlorinated Biphenyl Waste. According to the present invention, it is possible to safely install electrical equipment with an anti-vibration mat attached between the electrical equipment and the floor surface without relying on the skills of the worker, and by reducing restrictions on the workers who can perform the work, it is possible to quickly replace the transformer, and ultimately to replace electrical equipment that uses substances that may cause damage to human health and the living environment with new electrical equipment. Therefore, considering that users of the facility can continue to use the facility with peace of mind, it can be said that this invention can be expected to not only be used industrially but also to make a great contribution to society.

100 Lifting device 110 First support leg (of lifting device) 111 First main pillar (of first support leg) 112 First reinforcing pillar (of first support leg) 113 Right self-supporting member (of first support leg) 120 Second support leg (of lifting device) 121 Second main pillar (of second support leg) 122 Second reinforcing pillar (of second support leg) 123 Left self-supporting member (of second support leg) 130 Top beam (of lifting device) 140 Wire tensioning machine (of lifting device) 141 Main beam (of wire tensioning machine) 151 End pulley (of lifting device) 152a Upper central pulley (of lifting device) 152b Lower central pulley (of lifting device) 153 Lifting jig pulley (of lifting device) 160 Lifting jig 161 (of lifting device) Lifting beam (of the hoisting jig) 162 Lifting load material (of the hoisting jig) 200 Mat installation jig of the present invention 211 First magnet (of the mat installation jig) 212 Second magnet (of the mat installation jig) 213 Third magnet (of the mat installation jig) 221 Main body wall (of the mat installation jig) 221a Inner surface (of the main body wall) 221b Bottom surface (of the main body wall) 221c Recess (of the main body wall) 221d Through hole (of the main body wall) 222 Lower wall (of the mat installation jig) 230 Cushioning material (of the mat installation jig) A: Anchor metal fitting B: Cart C: Transformer M: Anti-vibration mat

Claims (5)

A tool for installing an anti-vibration mat under electrical equipment such as a transformer or generator installed indoors,
a main body wall having a first magnet provided on an inner surface thereof;
and a mounting means for removably mounting the vibration-proof mat;
When the inner surface is brought into contact with a side surface of the electric device, the main body wall is mounted on the electric device by the first magnet;
When the body wall is placed at the lower end of the electrical device with the vibration-proof mat attached by the mounting means, a part of the vibration-proof mat is disposed below the electrical device,
After the electrical equipment is placed on a floor surface with a portion of the vibration-proof mat disposed below the electrical equipment, the electrical equipment can be removed from the vibration-proof mat while leaving the vibration-proof mat in place.
A mat installation jig characterized by: the mounting means is constituted by a second magnet provided on a bottom surface of the body wall,
a part of an upper surface of the vibration-proof mat on which a magnetic body is provided is attached to the bottom surface of the main body wall by the second magnet and the magnetic body;
2. The mat installation jig according to claim 1. Further comprising a cushioning material covering the inner surface of the main body wall,
The main body wall is installed on the electric device with the buffer material interposed between the electric device and the main body wall.
2. The mat installation jig according to claim 1. A recess into which a finger can be inserted is formed on the side of the body wall.
2. The mat installation jig according to claim 1. A method for installing the electrical device in a room using the mat installation jig according to claim 1, comprising the steps of:
a mat mounting step of mounting the vibration-proof mat to the mat mounting jig by the mounting means;
a lifting step of lifting the electrical device;
a jig installation process for installing the mat installation jig to which the vibration-proof mat is attached at a lower end of the electric device so that a portion of the vibration-proof mat is disposed below the lifted electric device;
a suspending step of suspending the electrical equipment and placing the electrical equipment on a floor surface with a portion of the vibration-proof mat disposed below the electrical equipment;
and a jig removal step of removing the mat installation jig from the vibration-proof mat while leaving the vibration-proof mat in place after placing the electrical device on a floor surface.
1. A method for installing electrical equipment comprising: