Suspension bolt fixture and method of fixing electric apparatus

Abstract

To provide a suspension bolt fixture and a method of fixing an electric apparatus such that the efficiency of work to fit a bracing member to a suspension bolt can be improved.SOLUTION: A suspension bolt fixture 9 fixes a plurality of suspension bolts 2 supporting an electric apparatus in a building, with predetermined bolt position relation. The suspension bolt fixture 9 comprises a fixture body 10 fixed to lower parts of the plurality of suspension bolts 2. The fixture body 10 has a plurality of engagement parts engaging the suspension bolts 2, and an opening part 11 configured to allow a person to enter. The engagement parts are arranged around the opening part 11 in the same relation as the bolt position relation.SELECTED DRAWING: Figure 12

Description

[Technical Field]

[0001] The present disclosure relates to a hanging bolt fixing jig and a method for fixing electrical equipment. [Background technology]

[0002] In buildings, a technique for suspending electrical equipment from a ceiling opening using suspension bolts on a slab or ceiling frame structure is known. An example of electrical equipment placed in a ceiling opening is a ceiling-mounted cassette-type indoor unit. When securing this type of electrical equipment, vibration-proof members are sometimes attached to the suspension bolts to improve earthquake resistance or suppress vibration.

[0003] In new buildings, the indoor unit and anti-vibration members are attached to the suspension bolts before the ceiling is installed. In this case, the anti-vibration members can be attached after the indoor unit is attached to the suspension bolts. Alternatively, the anti-vibration members can be attached before the indoor unit is attached to the suspension bolts. For example, if the indoor unit has not yet arrived at the site, the anti-vibration members can be attached to the suspension bolts before the indoor unit is installed to save time.

[0004] In the case of an existing building with a ceiling, after removing the indoor unit from the suspension bolts, a worker enters the open ceiling opening and attaches the anti-vibration member to the suspension bolts. In this way, in the case of an existing building, the anti-vibration member is attached with the indoor unit removed. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 8-145461 Summary of the Invention [Problem to be solved by the invention]

[0006] However, if the anti-vibration member is attached to the suspension bolt when the indoor unit is not attached to the suspension bolt, the suspension bolt may be fixed in a misaligned position relative to the suspension bolt attachment part of the indoor unit. In this case, the anti-vibration member must be loosened, the position of the suspension bolt must be fine-tuned, and then the work must be redone by re-attaching the anti-vibration member.

[0007] One possible way to prevent the suspension bolts from shifting positions is to use the jig described in Patent Document 1. However, the jig described in this document does not allow for work to be done inside the spaces between the four suspension bolts. Therefore, in the case of a newly constructed building, the work of securing the vibration-proof members must be done while moving a stepladder and climbing up and down the stepladder. Furthermore, even in the case of an existing building, it is difficult to enter the spaces between the suspension bolts through a ceiling opening, so the work must be done from the outside of the suspension bolts. However, in order to work from the outside of the suspension bolts, a new opening must be created on the outside of the ceiling opening.

[0008] The present disclosure provides a hanging bolt fixing jig and a method for fixing electrical equipment that can improve the efficiency of the work of attaching an anti-vibration member to a hanging bolt. [Means for solving the problem]

[0009] The first aspect of the hanging bolt fixing jig that solves the problem is a hanging bolt fixing jig that fixes multiple hanging bolts that support electrical equipment in a building in a predetermined bolt positional relationship, and includes a jig body that is fixed to the lower parts of the multiple hanging bolts, and the jig body has multiple engaging portions that engage with the hanging bolts and an opening configured to allow a person to enter, and the engaging portions are arranged around the opening in a relationship that is the same as the bolt positional relationship.

[0010] According to this configuration, by engaging the suspension bolts with the engagement portions of the jig body, the suspension bolts can be fixed in a predetermined bolt positional relationship. Furthermore, when the suspension bolts are fixed by the jig body, a worker can enter the space between the bolts by passing through the opening of the jig body. This allows the installation of anti-vibration members within the space between the bolts. This improves the efficiency of the installation work of the anti-vibration members.

[0011] For example, in the case of an existing building with a ceiling, vibration-proof members may be attached to multiple suspension bolts in order to suspend a ceiling-embedded indoor unit from the slab. In this case, if the vibration-proof members are to be attached from the outside of the multiple suspension bolts, a new opening is required around the ceiling opening to insert the vibration-proof members into the attic.

[0012] In this regard, with the hanging bolt fixing jig, workers can enter the inter-bolt spaces through the ceiling opening and the opening in the jig body. This allows the vibration damping members to be attached to the hanging bolts from within the inter-bolt spaces between multiple hanging bolts, reducing the amount of movement required by the worker during the vibration damping member attachment work. In addition, the vibration damping members can be attached to the hanging bolts without creating a new opening around the ceiling opening.

[0013] A suspension bolt fixing jig according to a second aspect is the suspension bolt fixing jig according to the first aspect, wherein the jig body is configured to be disassembled or foldable.

[0014] According to this configuration, the suspension bolt fixing jig can be made compact, making it easy to transport the suspension bolt fixing jig to the site where it will be used. Also, during storage, the storage space required can be reduced.

[0015] A third aspect of the hanging bolt fixing jig is the hanging bolt fixing jig of the first or second aspect, in which the jig body can be attached to or detached from the hanging bolt by moving in a direction intersecting the hanging bolt or by rotating on a plane intersecting the hanging bolt.

[0016] With this configuration, the jig body can be removed in a direction intersecting the direction in which the suspension bolts extend, which makes it easier and faster to remove the jig body from the suspension bolts than if the jig body were lowered along the direction in which the suspension bolts extend.

[0017] A fourth aspect of the present invention relates to the hanger bolt fixing jig of the third aspect, and the engaging portions are configured as notches cut into the outer or inner peripheral edge of the jig body. This configuration allows the jig body to be removed in a direction intersecting the direction in which the hanger bolt extends.

[0018] A fifth aspect of the present invention relates to the hanger bolt fixing jig of the fourth aspect, wherein the plurality of engaging portions extend along a circle having a center at a point equidistant from the plurality of engaging portions in a plan view. With this configuration, the jig body can be removed in a direction intersecting the direction in which the hanger bolt extends by rotating the jig body.

[0019] A sixth aspect of the present invention relates to the hanger bolt fixing jig of the fourth aspect, wherein the plurality of engaging portions extend in the same direction. With this configuration, the jig body can be removed in a direction intersecting the extension direction of the hanger bolts by sliding the jig body in a direction intersecting the extension direction of the hanger bolts.

[0020] A seventh aspect of the present invention relates to the suspension bolt fixing jig of the first aspect, wherein the jig body is made up of a plurality of frame members, and the plurality of frame members are connected in a disassemblable manner to form the opening. With this configuration, the jig body can be bundled compactly.

[0021] According to an eighth aspect of the present invention, in the hanging bolt fixing jig of the first aspect, the jig body is made up of a plurality of frame members, the plurality of frame members are connected to form the opening, and two of the frame members facing each other are configured to be foldable. This configuration allows the jig body to be made compact easily and quickly.

[0022] A ninth aspect of the present invention relates to the hanger bolt fixing jig of the eighth aspect, and the jig body can be attached to or detached from the hanger bolt by folding the two frame members facing each other and unfolding the two frame members facing each other. This configuration allows the jig body to be attached to or detached from the hanger bolt easily and quickly.

[0023] A hanger bolt fixing jig according to a tenth aspect is the hanger bolt fixing jig according to the ninth aspect, wherein some first engaging portions of the plurality of engaging portions are configured as notches cut from the outer periphery of the jig body and extend in the unfolding direction of the frame member, and other second engaging portions of the plurality of engaging portions other than the first engaging portions are configured as notches cut from the outer periphery of the jig body and extend in the unfolding direction of the frame member. With this configuration, the jig body can be attached to the hanger bolt by extending it from a folded state. Also, the jig body can be removed by folding it from an extended state.

[0024] A suspension bolt fixing jig according to an eleventh aspect is the suspension bolt fixing jig according to any one of the first to tenth aspects, wherein a mark is provided on the jig body at a midpoint between two adjacent engaging portions.

[0025] According to this configuration, the jig body can be positioned relative to a location on the building where a positioning mark is provided, thereby easily positioning the suspension bolt relative to a predetermined location on the building.

[0026] A suspension bolt fixing jig of a twelfth aspect is the suspension bolt fixing jig of any one of the first to eleventh aspects, wherein the electrical equipment is disposed in a rectangular ceiling opening provided in the ceiling of the building and formed according to the size of the electrical equipment, and the jig body is configured to be sized so as to be insertable into the ceiling opening. With this configuration, the jig body can be inserted into the attic space in the building through the ceiling opening.

[0027] A suspension bolt fixing jig of a thirteenth aspect is the suspension bolt fixing jig of any one of the first to twelfth aspects, further comprising a guide for positioning the jig body relative to a portion of the building where the electrical equipment is disposed. This configuration makes it easy to position the jig body relative to the portion of the building where the electrical equipment is disposed.

[0028] A suspension bolt fixing jig of a fourteenth aspect is the suspension bolt fixing jig of the thirteenth aspect, wherein the electrical equipment is placed in a rectangular ceiling opening provided in the ceiling of the building and formed according to the size of the electrical equipment, the jig body has a rectangular outer shape in a plan view, and the guides are provided at corners of the jig body. This configuration makes it easy to position the jig body relative to the ceiling opening.

[0029] A fifteenth aspect of the hanging bolt fixing jig is the hanging bolt fixing jig of the fourteenth aspect, wherein the guide is configured to be able to contact two edges of the corners of the ceiling opening and extends to a position below the ceiling opening.

[0030] With this configuration, the jig body can be engaged with the ceiling opening via the guide. This maintains the position of the suspension bolt relative to the ceiling opening even when the suspension bolt is released, preventing the jig body from moving from its predetermined position. This makes it easy to attach the anti-vibration member to the suspension bolt.

[0031] A hanging bolt fixing jig of a 16th aspect is a hanging bolt fixing jig of any one of the 13th to 15th aspects, wherein the guide comprises a guide main body portion attached to the jig body, and a contact portion extending from the guide main body portion and configured to be able to contact two edges of a corner of a ceiling opening.

[0032] With this configuration, the contact portions of the guide can be brought into contact with the two edges of the corners of the ceiling opening, allowing the jig body to be accurately positioned relative to the ceiling opening. Also, because the jig body engages with the ceiling opening via the guide, movement of the jig body from its predetermined position can be prevented during the installation work of attaching the suspension bolt to the vibration prevention member.

[0033] A seventeenth aspect of the hanging bolt fixing jig is the hanging bolt fixing jig of the sixteenth aspect, wherein the guide further comprises an additional guide that is attached so that its position can be adjusted relative to the guide main body, and the additional guide has an abutment portion that is placed against the edge of the ceiling opening.

[0034] If the ceiling opening has a shape that does not conform to standard dimensions, or if the shape and dimensions of the ceiling opening deviate from the standard, the guide may not be able to accurately position the jig body relative to the ceiling opening.

[0035] In this regard, with the above-mentioned configuration, the additional guide can be placed against the edge of the ceiling opening, allowing the jig body to be accurately positioned relative to the ceiling opening. Also, because the jig body is engaged with the ceiling opening via the additional guide, movement of the jig body from its predetermined position can be prevented during the installation work of attaching the suspension bolt to the vibration prevention member.

[0036] The suspension bolt fixing jig of an eighteenth aspect is the suspension bolt fixing jig of any one of the thirteenth to seventeenth aspects, wherein the jig body is provided with an adjustment section that can adjust the position of the guide.

[0037] With this configuration, the position of the guide relative to the jig body can be adjusted depending on the size of the ceiling opening, so the suspension bolt fixing jig can be properly engaged with the ceiling opening for several ceiling openings of different sizes.

[0038] A suspension bolt fixing jig according to a 19th aspect is the suspension bolt fixing jig according to any one of the 13th to 18th aspects, wherein the guide is configured to be detachable from the jig body. With this configuration, the suspension bolt fixing jig can be disassembled into the jig body and the guide, making it easy to transport the suspension bolt fixing jig to a site where it will be used. In addition, since the suspension bolt fixing jig can be compactly stored, it can be stored in a small space.

[0039] A twentieth aspect of the hanging bolt fixing jig is a hanging bolt fixing jig of any one of the thirteenth to nineteenth aspects, wherein the guide comprises a guide main body portion attached to the jig body, and a first auxiliary guide and a second auxiliary guide movably attached to the guide main body portion, the first auxiliary guide being attached to the guide main body portion so as to be movably in a direction intersecting one of the two edges of the corner of the ceiling opening, and the second auxiliary guide being attached to the guide main body portion so as to be movably in a direction intersecting the other of the two edges of the corner of the ceiling opening.

[0040] With this configuration, the first auxiliary guide can be brought into contact with one of the two edges of the corner of the ceiling opening. The second auxiliary guide can be brought into contact with the other of the two edges of the corner of the ceiling opening. In this way, the positions of the first auxiliary guide and the second auxiliary guide can be adjusted independently. This allows the jig body to be positioned appropriately depending on the shape of the ceiling opening. Furthermore, because the jig body engages with the ceiling opening via the first auxiliary guide and the second auxiliary guide, movement of the jig body from its designated position during the installation work of attaching the suspension bolt to the vibration-proof member can be prevented.

[0041] A 21st aspect of the hanging bolt fixing jig is the 20th aspect of the hanging bolt fixing jig, wherein at least one of the first auxiliary guide and the second auxiliary guide has a side that is defined by a first specified length, and the first specified length is defined as the length from the hanging bolt fixing position in the electrical equipment to the highest point in the electrical equipment that interferes with the hanging bolt.

[0042] In the hanging bolt, the anti-vibration member is attached to the hanging bolt so as not to interfere with the electrical equipment. Since the anti-vibration member is attached to the hanging bolt before the electrical equipment is attached to the hanging bolt, it is preferable that the range in which the electrical equipment will be placed on the hanging bolt can be easily determined. In this regard, according to the above configuration, the range in which the electrical equipment will be placed on the hanging bolt can be easily determined using the first auxiliary guide or the second auxiliary guide. This improves the efficiency of the anti-vibration member installation work.

[0043] A method for fixing electrical equipment according to a 22nd aspect that solves the problem is a method for fixing electrical equipment to a plurality of suspension bolts using a suspension bolt fixing jig, wherein the suspension bolt fixing jig is any one of the suspension bolt fixing jigs according to the first to 11th aspects, and includes a first step of fixing a plurality of suspension bolts in a predetermined bolt positional relationship using the suspension bolt fixing jig for a plurality of suspension bolts that support the electrical equipment in a building, a second step of attaching anti-vibration members to the plurality of suspension bolts fixed by the suspension bolt fixing jig, a third step of removing the suspension bolt fixing jig from the plurality of suspension bolts, and a fourth step of fixing the electrical equipment to the plurality of suspension bolts to which the anti-vibration members are attached.

[0044] According to this configuration, the suspension bolt fixing jig of the above configuration is used to position the suspension bolts. Therefore, by engaging the suspension bolts with the engaging portions of the jig body, multiple suspension bolts can be fixed in a predetermined bolt positional relationship. Then, when multiple suspension bolts are fixed with the jig body, a worker can enter the space between the bolts by passing through the opening of the jig body. This allows the installation work of the vibration prevention member to be performed within the space between the bolts. This improves the efficiency of the installation work of the vibration prevention member.

[0045] A method for fixing electrical equipment according to a twenty-third aspect that solves the problem is a method for fixing electrical equipment to a plurality of suspension bolts using a suspension bolt fixing jig and placing the electrical equipment in a ceiling opening, wherein the suspension bolt fixing jig is the suspension bolt fixing jig described in any one of the twelfth to twentieth aspects, and includes the following steps: a first step of fixing a plurality of suspension bolts in a predetermined bolt positional relationship with respect to a plurality of suspension bolts that support the electrical equipment in a building using the jig body of the suspension bolt fixing jig; a second step of positioning the suspension bolts with respect to the ceiling opening by bringing guides of the suspension bolt fixing jig into contact with the ceiling opening; a third step of attaching anti-vibration members to the plurality of suspension bolts fixed by the suspension bolt fixing jig; a fourth step of removing the jig body and the guides of the suspension bolt fixing jig from the plurality of suspension bolts; and a fifth step of fixing the electrical equipment to the plurality of suspension bolts to which the anti-vibration members have been attached.

[0046] According to this configuration, the suspension bolt fixing jig of the above configuration is used to position the suspension bolts. Therefore, by engaging the suspension bolts with the engaging portions of the jig body, multiple suspension bolts can be fixed in a predetermined bolt positional relationship. Furthermore, the guides allow multiple suspension bolts to be positioned relative to the ceiling opening. Then, when multiple suspension bolts are fixed with the jig body, a worker can enter the space between the bolts by passing through the opening of the jig body. This allows the installation work of the vibration prevention member to be performed within the space between the bolts. This improves the efficiency of the vibration prevention member installation work. [Brief explanation of the drawings]

[0047] [Figure 1] FIG. 2 is a perspective view of a jig body of the suspension bolt fixing jig according to the first embodiment. [Figure 2] FIG. 2 is a plan view of a jig body of the suspension bolt fixing jig according to the first embodiment. [Figure 3] FIG. 2 is a perspective view of a first frame member. [Figure 4] FIG. 10 is a diagram for explaining a method for assembling four frame members. [Figure 5] FIG. 10 is a partial perspective view of the jig body engaged with the suspension bolt. [Figure 6] 10A and 10B are diagrams for explaining a method for removing the jig body from the suspension bolt. [Figure 7] FIG. [Figure 8] FIG. 2 is a partial perspective view of a jig body to which a guide is attached. [Figure 9] FIG. 10 is a plan view of a jig body and guides in a first example of guide arrangement. [Figure 10] FIG. 10 is a plan view of the jig body and the guides in a second example of the guide arrangement. [Figure 11] FIG. 10 is a perspective view of a suspension bolt before a jig body is attached, in a method for fixing an electrical device. [Figure 12] FIG. 10 is a perspective view of a suspension bolt and a jig body in a first step of a method for fixing an electrical device. [Figure 13] FIG. 10 is a perspective view of a suspension bolt, a jig body, and a guide in a second step of the method for fixing an electrical device. [Figure 14] FIG. 10 is a perspective view of a suspension bolt, a vibration-proof member, a jig body, and a guide in a third step of the method for fixing an electrical device. [Figure 15] FIG. 10 is a perspective view of a suspension bolt and a vibration-proof member in a fourth step of the method for fixing an electrical device. [Figure 16]FIG. 10 is a perspective view of a suspension bolt, a vibration-proof member, and an electrical device in a fifth step of the method for fixing the electrical device. [Figure 17] 10 is a flowchart of a first example of a method for fixing an electrical device. [Figure 18] 10 is a flowchart of a second example of a method for fixing an electrical device. [Figure 19] FIG. 10 is a plan view of a jig body of a suspension bolt fixing jig according to a second embodiment. [Figure 20] FIG. 10 is a plan view of a folded jig body of the suspension bolt fixing jig according to the second embodiment. [Figure 21] FIG. 11 is a perspective view of a guide in the suspension bolt fixing jig according to the third embodiment. [Figure 22] 22 is a perspective view of a guide of the suspension bolt fixing jig according to the third embodiment, seen from a direction different from the direction of view in FIG. 21. FIG. [Figure 23] FIG. 10 is a plan view of a jig body of a suspension bolt fixing jig according to a third embodiment. [Figure 24] FIG. 11 is a plan view of a guide in contact with a ceiling opening in the suspension bolt fixing jig according to the third embodiment. [Figure 25] FIG. 11 is a perspective view of a guide in contact with a ceiling opening in the suspension bolt fixing jig according to the third embodiment. [Figure 26] FIG. 10 is a perspective view of a suspension bolt, a jig body, and a guide arranged relative to a ceiling opening in a suspension bolt fixing jig according to a third embodiment. [Figure 27] 10A and 10B are diagrams for explaining how to use the first auxiliary guide. [Figure 28] FIG. 10 is a perspective view of a guide in a first modified example of the suspension bolt fixing jig in the first embodiment. [Figure 29] FIG. 10 is a perspective view of a guide to which an additional guide is attached in a first modified example of the suspension bolt fixing jig in the first embodiment. [Figure 30] 10 is a plan view showing the relationship between the jig body, guides, and additional guides in a first example of the arrangement of the additional guides. FIG. [Figure 31] FIG. 10 is a plan view showing the relationship between the jig body, the guide, and the additional guide in a second example of the arrangement of the additional guide. [Figure 32] FIG. 10 is a plan view of a jig body in a second modified example of the suspension bolt fixing jig in the first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0048] First Embodiment 1 to 18, a description will be given of a hanging bolt fixing jig 9 according to a first embodiment and a method for fixing an electrical device 1. In this embodiment, other embodiments, and modified examples, a rectangle is used as a concept including a rectangular shape and a square shape.

[0049] [Hanging bolt fixing jig] The suspension bolt fixing jig 9 is a jig that fixes a plurality of suspension bolts 2 that support electrical equipment 1 in a building in a predetermined bolt positional relationship.

[0050] The multiple suspension bolts 2 are fixed to a slab or ceiling framework structure (hereinafter simply referred to as a slab) of a building in a predetermined bolt positional relationship in a plan view. Specifically, the multiple suspension bolts 2 are fixed to the slab of a building in a predetermined bolt positional relationship corresponding to the electrical equipment 1 fixed to the suspension bolts 2. The electrical equipment 1 fixed to the suspension bolts 2 is provided with suspension bolt mounting portions 1B with which the suspension bolts 2 engage. The suspension bolts 2 are fixed to a slab or the like so as to have the same positional relationship as the positional relationship of the suspension bolt mounting portions 1B of the electrical equipment 1 fixed to the suspension bolts 2. The positional relationship of the suspension bolt mounting portions 1B of the electrical equipment 1 is consolidated into several patterns depending on the specifications of each manufacturer. Therefore, the multiple suspension bolts 2 are arranged in a bolt positional relationship that matches one of several patterns. Several different types of suspension bolt fixing jigs 9 are prepared to suit each of several patterns.

[0051] The electrical equipment 1 is fixed to a slab by a suspension bolt 2. The suspension bolt 2 is attached to the slab of a building. The suspension bolt 2 suspends the electrical equipment 1. The electrical equipment 1 and the suspension bolt 2 are housed in the space above the ceiling SA between the slab and the ceiling 4 inside the room. Examples of the electrical equipment 1 include a ceiling-embedded indoor unit 1A installed in a ceiling opening 5, a ceiling-embedded ventilation device installed in the ceiling opening 5, and the like. Hereinafter, this embodiment will be described using the indoor unit 1A as an example.

[0052] The indoor unit 1A is placed in a ceiling opening 5. The ceiling opening 5 is provided in a ceiling 4 inside a building. The ceiling opening 5 is formed to a size corresponding to the size of the electrical device 1. In one example, the ceiling opening 5 is formed to be rectangular.

[0053] The indoor unit 1A is suspended from a slab by four suspension bolts 2. In recent years, to improve earthquake resistance, the suspension bolts 2 have been reinforced with vibration-proof members 3. An example of the vibration-proof member 3 is a brace. Two braces are connected to the two suspension bolts 2 in a mutually crossed state.

[0054] Reinforcement using anti-vibration members 3 may be performed on newly constructed buildings, or may be added to existing buildings to increase earthquake resistance. Anti-vibration members 3 have the following problem. When the four suspension bolts 2 are reinforced with anti-vibration members 3, the positions of the lower ends of the four suspension bolts 2 may shift from the specified bolt positional relationship. This makes it impossible to attach the indoor unit 1A to the four suspension bolts 2. Furthermore, the positions of the lower ends of the four suspension bolts 2 may shift from their specified positions relative to the ceiling opening 5. This causes the indoor unit 1A attached to the four suspension bolts 2 to shift from its specified position relative to the ceiling opening 5, making it impossible to completely cover the ceiling opening 5 with a decorative panel (not shown) attached to the indoor unit 1A to cover the ceiling opening 5. The suspension bolt fixing jig 9 of this embodiment is used to prevent such misalignment of the four suspension bolts 2.

[0055] The suspension bolt fixing jig 9 includes a jig body 10. The suspension bolt fixing jig 9 further includes a guide 40. The jig body 10 is fixed to the lower parts of the plurality of suspension bolts 2. The guide 40 positions the jig body 10 relative to the ceiling opening 5.

[0056] [Jig body] 1, the jig body 10 has a plurality of engagement portions 12 that engage with the hanging bolts 2, and an opening 11. The engagement portions 12 are arranged around the opening 11 in the same positional relationship as the bolts.

[0057] 2, the jig body 10 has a rectangular outer shape in a plan view. The jig body 10 is configured to have a size that allows it to be inserted into the ceiling opening 5.

[0058] The opening 11 is configured to allow a person to enter the opening 11. The opening 11 is provided to allow a person to enter the inter-bolt space S between the multiple suspension bolts 2. A person enters the inter-bolt space S by crawling through the opening 11. In other words, the size of the opening 11 is large enough for a person to enter.

[0059] The jig body 10 is configured as a frame. The jig body 10 may be configured in a frame shape by pressing an iron plate, or may be configured in a frame shape by joining a plurality of rod-shaped members. The jig body 10 may be configured to be deformable. Furthermore, the jig body 10 may be configured to be foldable.

[0060] In this embodiment, the jig body 10 is formed by joining a plurality of frame members 20. The plurality of frame members 20 are joined so as to form an opening 11 and so as to be disassembled.

[0061] The jig body 10 includes four frame members 20. The four frame members 20 are divided into first frame members 21 and second frame members 22. The jig body 10 includes two first frame members 21 and two second frame members 22. The first frame members 21 are longer than the second frame members 22. The second frame members 22 have the same structure as the first frame members 21.

[0062] As shown in Fig. 3, the first frame member 21 includes an upper surface portion 25 extending in the longitudinal direction, a first side surface portion 26A extending in the longitudinal direction, a second side surface portion 26B opposite the first side surface portion 26A, and an end surface portion 27 intersecting the upper surface portion 25 and the first side surface portion 26A. The first frame member 21 has a first end portion 21A in the longitudinal direction and a second end portion 21B opposite the first end portion 21A. The end surface portion 27 is provided at the first end portion 21A. In this embodiment, when there is no need to distinguish between the first end portion 21A and the second end portion 21B, they are simply referred to as end portions.

[0063] An end surface portion 27 of the first frame member 21 is connected to a first side surface portion 26A of one of the two second frame members 22. A portion of the first side surface portion 26A of the first frame member 21 near the second end portion 21B is connected to an end surface portion 27 of the other of the two second frame members 22.

[0064] The four frame members 20 are joined together so that their first side surface portions 26A face inward. The opening 11 is defined by the first side surface portions 26A of the four frame members 20.

[0065] As shown in Figure 4, the four frame members 20 are bundled together so that they overlap each other for ease of transportation. The first frame members 21 are stacked on top of each other. The second frame members 22 are stacked on top of each other. Then, a pair of first frame members 21 and a pair of second frame members 22 are stacked on top of each other. Because the four frame members 20 are not tubular but have a structure made up of three panel members, the four frame members 20 can be bundled together compactly in this way.

[0066] [Engagement part] As shown in FIG. 5, the jig body 10 is fixed to the hanging bolt 2. The hanging bolt 2 is placed in the engagement portion 12. The engagement portion 12 is then placed between two nuts 2A that engage with the hanging bolt 2. At this time, the second side surface portion 26B prevents a reference nut 2B (see below), which is one of the two nuts 2A, from coming off. A nut 2A that is large enough to come into contact with the second side surface portion 26B is used as the reference nut 2B. The jig body 10 is then fixed to the hanging bolt 2 by tightening the nut 2A.

[0067] An engagement portion 12 is provided on each of the top surface portions 25 of the four frame members 20. The engagement portion 12 is configured as a notch cut into the outer peripheral edge 16 of the jig body 10. The outer peripheral edge 16 includes the outer edges of the four top surface portions 25.

[0068] The engagement portion 12 extends from the bolt position where the suspension bolt 2 is located on the jig body 10 toward the outer circumferential edge 16 of the jig body 10. The engagement portion 12 is configured so that the width of the engagement portion 12 increases toward the outer circumferential edge 16. The bolt position on the jig body 10 is set based on the above-mentioned predetermined bolt positional relationship.

[0069] As shown in FIG. 6 , the multiple engaging portions 12 extend, in a plan view, along a circle C whose center is a point PC that is equidistant from the multiple engaging portions 12. With the engaging portions 12 arranged in this manner, the jig body 10 is configured to be attachable to or detachable from the suspension bolt 2 by rotating it on a plane that intersects with the suspension bolt 2. Due to the structure of the engaging portions 12 extending along the circle C, by rotating the jig body 10, the four suspension bolts 2 can be smoothly engaged with the respective engaging portions 12 of the jig body 10. Furthermore, by rotating the jig body 10, each portion of the jig body 10 can be smoothly detached from the four suspension bolts 2.

[0070] 2, a mark 29 is provided on the jig body 10 at a position midway between two adjacent engagement portions 12. In one example, the mark 29 is configured as a hole penetrating the top surface portion 25.

[0071] The jig body 10 is provided with an adjustment unit 30 that can adjust the position of the guide 40. The adjustment unit 30 is provided at each corner 15 of the jig body 10. The corner 15 of the jig body 10 is a portion that includes an end of the first frame member 21 and an end of the second frame member 22.

[0072] The adjustment unit 30 includes three groove sets 31. Each groove set 31 includes a first groove 33 and a second groove 34 that extend in different directions. The first groove 33 is provided at an end of the first frame member 21. The first groove 33 extends along the longitudinal direction of the first frame member 21. The second groove 34, which forms a set with the first groove 33, is provided at an end of the second frame member 22 that is connected to the first frame member 21 in which the first groove 33 is provided. The second groove 34 extends along the longitudinal direction of the second frame member 22. The second groove 34 is configured so that a line extending along the second groove 34 is perpendicular to a line extending along the first groove 33. The first groove 33 and the second groove 34 are configured as through holes so that the claws 46 of the guide 40 can be inserted therethrough. The three groove sets 31 are arranged at intervals in a direction along a diagonal line of the jig body 10, and the first grooves 33 are parallel to one another.

[0073] The guide 40 is engaged with one of three groove sets 31 of the adjustment section 30 of the jig body 10. Due to the structure in which the groove set 31 with which the guide 40 engages can be selected from the three groove sets 31, the position of the guide 40 with respect to the jig body 10 can be adjusted.

[0074] [guide] The guide 40 is a tool for positioning the jig body 10 relative to the portion of the building where the electrical device 1 is to be placed (specifically, the ceiling opening 5). The guide 40 is provided at the corner 15 of the jig body 10.

[0075] When attached to the jig body 10, the guide 40 is configured to be able to come into contact with two edges of the corners 6 of the ceiling opening 5. When attached to the jig body 10, the guide 40 extends to a position below the ceiling opening 5. The guide 40 is configured to be detachable from the jig body 10.

[0076] 7, the guide 40 includes a guide main body portion 41 and a contact portion 42. The guide main body portion 41 is configured to be attached to the jig main body 10. The contact portion 42 is configured to extend from the guide main body portion 41 and be able to contact two edges of the corner portion 6 of the ceiling opening 5. The guide main body portion 41 has an upper plate 43 that is disposed on the upper surface of the jig main body 10. The contact portion 42 has a hanging portion 48 that extends downward from the upper plate 43.

[0077] The upper plate 43 has a first portion 44 disposed on the first frame member 21 and a second portion 45 disposed on the second frame member 22. The second portion 45 extends so as to intersect with the longitudinal direction of the first portion 44. The first portion 44 is provided with a claw 46 that engages with the first groove 33 of the first frame member 21. The second portion 45 is provided with a claw 46 that engages with the second groove 34 of the second frame member 22.

[0078] A bolt insertion portion 47 through which the suspension bolt 2 is inserted is provided between the first portion 44 and the second portion 45. The bolt insertion portion 47 extends outward from the portion where the inner end of the first portion 44 and the inner end of the second portion 45 intersect.

[0079] The hanging portion 48 has a first hanging portion 48A extending downward from the outer end of the first portion 44 and a second hanging portion 48B extending downward from the outer end of the second portion 45. The second hanging portion 48B is perpendicular to the first hanging portion 48A in a plan view.

[0080] 8, the claws 46 of the guide 40 are inserted into the first groove 33 and the second groove 34 of the corner 15 of the jig body 10, thereby positioning the guide 40 on the jig body 10. The guide 40, together with the jig body 10, is disposed between the two nuts 2A, and is fixed to the suspension bolt 2 by tightening the nuts 2A.

[0081] As shown in FIG. 9 , the guides 40 are disposed at each of the four corners 15 of the jig body 10. The upper plate 43 of the guide 40 is disposed on the jig body 10. The claws 46 of the guide 40 are engaged with one of the groove sets 31 of the adjustment unit 30. The guide 40 is disposed relative to the jig body 10 so that the contact portion 42 of the guide 40 is positioned at the corner 6 of the ceiling opening 5 in a plan view. This allows the guide 40 to be fixed in a position where it can contact the corner 6 of the ceiling opening 5. By fixing such a guide 40 to the jig body 10, the jig body 10 can be accurately positioned relative to the ceiling opening 5. Because the jig body 10 is engaged with the ceiling opening 5 via the guides 40, movement of the jig body 10 from its predetermined position can be prevented during the work of attaching the anti-vibration member 3 to the hanging bolt 2.

[0082] An example of the arrangement of the guide 40 will be described with reference to FIGS. 9 shows a first example of the arrangement of the guide 40. In this example, the claws 46 of the guide 40 are engaged with the innermost first groove 33 and second groove 34 in the jig body 10.

[0083] 10 shows a second example of the arrangement of the guides 40. In this example, the claws 46 of the guides 40 are engaged with the first groove 33 and the second groove 34 located between the innermost and outermost sides of the jig body 10. In this case, each guide 40 is arranged further outward than in the first example.

[0084] As can be seen from FIGS. 9 and 10, the position of the guide 40 relative to the jig body 10 can be adjusted by selecting the groove set 31 with which the claws 46 of the guide 40 engage from the three groove sets 31 of the adjustment portion 30.

[0085] 11 to 16, an example of a method for fixing the electrical device 1 will be described. Here, an example will be given in which the hanging bolts 2 are reinforced with vibration-proof members 3 to improve earthquake resistance in an existing building in which the electrical device 1 is embedded in the ceiling 4.

[0086] 11, in reinforcing the suspension structure of the electric device 1 in an existing building, first, the electric device 1 is removed from the suspension bolt 2. Then, a reference nut 2B, which will be described later, is placed at a predetermined height on the suspension bolt 2. Specifically, the reference nut 2B is placed at a position on the suspension bolt 2 where the suspension bolt mounting portion 1B of the electric device 1 is fixed.

[0087] Next, as shown in FIG. 12, the jig body 10 is used to fix the suspension bolts 2 supporting the electrical equipment 1 in the building in a predetermined bolt positional relationship.

[0088] Specifically, the jig body 10 is assembled by connecting four frame members 20 at the site where the electrical device 1 is installed. The jig body 10 may be assembled at a different location rather than at the site. Next, the jig body 10 is inserted into the ceiling space SA through the ceiling opening 5. Then, worker P holds the jig body 10 while it is inside the opening 11 of the jig body 10. Worker P positions the jig body 10 horizontally so that each engagement portion 12 is located near the suspension bolt 2. Worker P rotates the jig body 10 so that the suspension bolt 2 fits into each engagement portion 12. With the suspension bolt 2 fitted into the engagement portion 12, the jig body 10 is temporarily fixed to the suspension bolt 2 at a predetermined height position on the suspension bolt 2.

[0089] Next, as shown in FIG. 13, the guide 40 of the suspension bolt fixing jig 9 is brought into contact with the ceiling opening 5, thereby positioning the suspension bolt 2 relative to the ceiling opening 5.

[0090] Specifically, the guide 40 is attached to the jig body 10 by engaging the claws 46 of the guide 40 with the preselected groove set 31. The groove set 31 is selected based on the positional relationship between the groove set 31 of the jig body 10 and the corner 6 of the ceiling opening 5. The work of attaching the guide 40 to the jig body 10 may be performed before the work of fixing the jig body 10 to the suspension bolt 2, or may be performed after the jig body 10 has been temporarily fixed to the suspension bolt 2.

[0091] After positioning the hanging bolt 2 relative to the ceiling opening 5, the nut 2A attached to the hanging bolt 2 is tightened to fix the jig body 10 and the guide 40 to the hanging bolt 2. This makes the hanging bolt 2, jig body 10, guide 40, and ceiling opening 5 integrated and less likely to become misaligned with one another.

[0092] Next, as shown in FIG. 14, the vibration prevention members 3 are attached to the plurality of suspension bolts 2 fixed by the suspension bolt fixing jig 9.

[0093] Specifically, worker P enters opening 11 and then enters inter-bolt space S between multiple suspension bolts 2. Then, for four suspension bolts 2, worker P connects two suspension bolts 2 to each other with vibration prevention members 3. If the vibration prevention members 3 are braces, the two braces are attached to the suspension bolts 2 in a crossed state. By entering inter-bolt space S, worker P positions all four suspension bolts 2 close to worker P. Therefore, worker P can install the vibration prevention members 3 more efficiently than if he or she were to perform the installation work while going around the outer periphery of inter-bolt space S.

[0094] Next, as shown in Figure 15, the jig body 10 and guides 40 are removed from the multiple suspension bolts 2. The removed jig body 10 and guides 40 are taken out through the ceiling opening 5 and placed on the floor. The jig body 10 is then disassembled into frame members 20. The four frame members 20 are bundled together so that they overlap each other for easy transportation.

[0095] Next, as shown in Fig. 16, the electrical device 1 is fixed to a plurality of hanging bolts 2 to which anti-vibration members 3 are attached. Since the hanging bolts 2 are fixed by the anti-vibration members 3 in a predetermined bolt positional relationship, the electrical device 1 can be easily fixed to the hanging bolts 2.

[0096] The electric device 1 can be fixed either using the guide 40 or not using the guide 40. The steps of each method will be briefly described below.

[0097] [Example 1 of how to secure electrical equipment] 17, a first example of a method for fixing the electric device 1 will be described. In the first example, the suspension bolt 2 is fixed only by the jig body 10 without using the guide 40, and then the electric device 1 is fixed to the suspension bolt 2.

[0098] The first example of the method for fixing the electrical device 1 includes a first step S1 to a fourth step S4. In the first step S1, the plurality of suspension bolts 2 are fixed in a predetermined bolt positional relationship with respect to the plurality of suspension bolts 2 by a jig body 10 of a suspension bolt fixing jig 9. In the second step S2, vibration prevention members 3 are attached to the plurality of suspension bolts 2 fixed by the suspension bolt fixing jig 9. In the third step S3, the suspension bolt fixing jig 9 is removed from the plurality of suspension bolts 2. In the fourth step S4, the electrical device 1 is fixed to the plurality of suspension bolts 2 to which the vibration prevention members 3 are attached.

[0099] The work procedure of the first step S1 is similar to the procedure described above with reference to Figure 12. The work procedure of the second step S2 is similar to the procedure described above with reference to Figure 14. The work procedure of the third step S3 is similar to the procedure described above with reference to Figure 15. The work procedure of the fourth step S4 is similar to the procedure described above with reference to Figure 16.

[0100] [Second example of how to secure electrical equipment] A second example of the method for fixing the electric device 1 will be described with reference to Fig. 18. The second example is a method in which the suspension bolt 2 is fixed using the jig body 10 and the guide 40, and then the electric device 1 is fixed to the suspension bolt 2. The second example corresponds to the method described above with reference to Figs. 11 to 16.

[0101] The second example of the method for fixing the electrical device 1 includes a first step S11 to a fifth step S15. In the first step S11, the jig body 10 fixes the multiple suspension bolts 2 in a predetermined bolt positional relationship with respect to the multiple suspension bolts 2. In the second step S12, the guide 40 is brought into contact with the ceiling opening 5, thereby positioning the suspension bolts 2 with respect to the ceiling opening 5. In the third step S13, the vibration prevention members 3 are attached to the multiple suspension bolts 2 fixed by the suspension bolt fixing jig 9. In the fourth step S14, the jig body 10 and the guide 40 are removed from the multiple suspension bolts 2. In the fifth step S15, the electrical device 1 is fixed to the multiple suspension bolts 2 to which the vibration prevention members 3 are attached.

[0102] The work procedure of the first step S11 is similar to the procedure described above with reference to FIG. 12. The work procedure of the second step S12 is similar to the procedure described above with reference to FIG. 13. The work procedure of the third step S13 is similar to the procedure described above with reference to FIG. 14. The work procedure of the fourth step S14 is similar to the procedure described above with reference to FIG. 15. The work procedure of the fifth step S15 is similar to the procedure described above with reference to FIG. 16.

[0103] [Operation of the embodiment] The jig body 10 can fix the four suspension bolts 2 in positions that have a predetermined bolt positional relationship. The jig body 10 is provided with an opening 11 that allows a person to enter. Therefore, when the four suspension bolts 2 are fixed by the jig body 10, the worker P can enter the inter-bolt space S through the opening 11. In this way, since the worker P can enter the inter-bolt space S, the vibration prevention members 3 can be efficiently attached to the four suspension bolts 2.

[0104] [Effects of the embodiment] The effects of this embodiment will be described. (1) The jig body 10 has a plurality of engagement portions 12 that engage with the hanging bolts 2 and an opening 11 configured to allow a person to enter. The engagement portions 12 are arranged around the opening 11 in the same positional relationship as the bolts.

[0105] According to this configuration, the suspension bolts 2 can be fixed in a predetermined bolt positional relationship by engaging the suspension bolts 2 with the engaging portions 12 of the jig body 10. When the suspension bolts 2 are fixed by the jig body 10, a worker P can enter the inter-bolt space S by passing through the opening 11 of the jig body 10. This allows the installation work of the vibration prevention member 3 to be performed in the inter-bolt space S.

[0106] For example, in the case of an existing building with a ceiling 4 stretched, in order to suspend a ceiling-embedded indoor unit 1A from a slab, anti-vibration members 3 may be attached to multiple suspension bolts 2. In this case, if the anti-vibration members 3 are to be attached from the outside of the multiple suspension bolts 2, a new opening 11 is required around the ceiling opening 5 in order to insert the anti-vibration members 3 into the attic space SA.

[0107] In this regard, with the suspension bolt fixing jig 9, the worker P can enter the inter-bolt space S through the ceiling opening 5 and the opening 11 of the jig body 10. This allows the vibration prevention members 3 to be attached to the suspension bolts 2 from within the inter-bolt space S between the multiple suspension bolts 2, thereby reducing the movement of the worker P during the work of attaching the vibration prevention members 3. In addition, the vibration prevention members 3 can be attached to the suspension bolts 2 without providing a new opening 11 around the ceiling opening 5.

[0108] (2) The jig body 10 is configured to be disassembled. Alternatively, the jig body 10 may be configured to be foldable (see the second embodiment). With this configuration, the suspension bolt fixing jig 9 can be made compact, making it easy to transport the suspension bolt fixing jig 9 to the site where it will be used. Furthermore, during storage, the storage space required can be reduced.

[0109] (3) The jig body 10 can be attached to or detached from the hanging bolt 2 by rotating on a plane intersecting the hanging bolt 2. With this configuration, the jig body 10 can be detached in a direction intersecting the direction in which the hanging bolt 2 extends (for example, horizontally). Therefore, the jig body 10 can be detached from the hanging bolt 2 more easily and quickly than when the jig body 10 is lowered along the direction in which the hanging bolt 2 extends.

[0110] (4) The engaging portion 12 is configured as a notch cut into the outer peripheral edge 16 or the inner peripheral edge 17 of the jig body 10. With this configuration, the jig body 10 can be removed in a direction intersecting the direction in which the hanging bolt 2 extends.

[0111] (5) In a plan view, the engaging portion 12 extends along a circle C having a center at a point equidistant from the plurality of engaging portions 12. With this configuration, the jig body 10 can be removed in a direction intersecting the direction in which the hanging bolt 2 extends by rotating the jig body 10.

[0112] (6) The jig body 10 is made up of a plurality of frame members 20. The plurality of frame members 20 are disassembled and connected to form the opening 11. With this configuration, the jig body 10 can be bundled compactly.

[0113] (7) The jig body 10 has a mark 29 at the midpoint between two adjacent engagement portions 12. This configuration allows the jig body 10 to be positioned relative to a location on the building where a positioning mark is provided. This makes it easy to position the suspension bolt 2 relative to a predetermined location on the building. For example, the jig body 10 can be positioned relative to a positioning mark provided around the ceiling opening 5.

[0114] (8) The jig body 10 is configured to have a size that allows it to be inserted through the ceiling opening 5. With this configuration, the jig body 10 can be inserted into the attic space SA through the ceiling opening 5 in a building.

[0115] (9) The suspension bolt fixing jig 9 includes a guide 40. The guide 40 is configured to position the jig body 10 relative to the location in the building where the electrical device 1 is to be placed. This configuration makes it easy to position the jig body 10 relative to the location in the building where the electrical device 1 is to be placed.

[0116] (10) The jig body 10 has a rectangular outer shape in a plan view. The guides 40 are provided at the corners 15 of the jig body 10. This configuration makes it easy to position the jig body 10 relative to the ceiling opening 5.

[0117] (11) The guide 40 is configured to be able to come into contact with two edges of the corner 6 of the ceiling opening 5, and extends to a position below the ceiling opening 5. With this configuration, the jig body 10 can be engaged with the ceiling opening 5 via the guide 40. This allows the position of the hanging bolt 2 to be maintained relative to the ceiling opening 5 even when the hanging bolt 2 is released, and prevents the jig body 10 from moving from its predetermined position. This makes it easy to attach the anti-vibration member 3 to the hanging bolt 2.

[0118] (12) The guide 40 includes a guide main body 41 and a contact portion 42. The contact portion 42 is configured to be able to come into contact with two edges of the corner 6 of the ceiling opening 5. With this configuration, the contact portion 42 of the guide 40 can be brought into contact with two edges of the corner 6 of the ceiling opening 5, so that the jig main body 10 can be accurately positioned relative to the ceiling opening 5. Furthermore, because the jig main body 10 engages with the ceiling opening 5 via the guide 40, movement of the jig main body 10 from a predetermined position during the installation work of attaching the suspension bolt 2 to the vibration prevention member 3 can be suppressed.

[0119] (13) The jig body 10 is provided with an adjustment unit 30 that can adjust the position of the guide 40. With this configuration, the position of the guide 40 relative to the jig body 10 can be adjusted according to the size of the ceiling opening 5. Therefore, the suspension bolt fixing jig 9 can be appropriately engaged with the ceiling opening 5 for several ceiling openings 5 ​​of different sizes.

[0120] (14) The guide 40 is configured to be detachable from the jig body 10. With this configuration, the suspension bolt fixing jig 9 can be disassembled into the jig body 10 and the guide 40, making it easy to transport the suspension bolt fixing jig 9 to the site where it will be used. In addition, since the suspension bolt fixing jig 9 can be compactly packed during storage, the storage space required can be reduced.

[0121] (15) A first example of a method for fixing an electrical device 1 includes a first step S1 to a fourth step S4. In the first step S1, a plurality of suspension bolts 2 that support the electrical device 1 in a building are fixed in a predetermined bolt positional relationship using a suspension bolt fixing jig 9. In the second step S2, vibration-proof members 3 are attached to the plurality of suspension bolts 2 fixed by the suspension bolt fixing jig 9. In the third step S3, the suspension bolt fixing jig 9 is removed from the plurality of suspension bolts 2. In the fourth step S4, the electrical device 1 is fixed to the plurality of suspension bolts 2 to which the vibration-proof members 3 are attached.

[0122] According to this configuration, the suspension bolt fixing jig 9 configured as described above is used to position the suspension bolts 2. Therefore, by engaging the suspension bolts 2 with the engaging portions 12 of the jig body 10, the suspension bolts 2 can be fixed in a predetermined bolt positional relationship. Then, when the suspension bolts 2 are fixed with the jig body 10, a worker P can enter the inter-bolt space S by passing through the openings 11 of the jig body 10. This allows the installation work of the vibration prevention members 3 to be performed within the inter-bolt space S. The work efficiency of installing the vibration prevention members 3 can be improved.

[0123] (16) A second example of a method for fixing an electrical device 1 includes a first step S11 to a fifth step S15. In the first step S11, a jig body 10 of a suspension bolt fixing jig 9 is used to fix a plurality of suspension bolts 2 supporting the electrical device 1 in a building in a predetermined bolt positional relationship. In the second step S12, a guide 40 of the suspension bolt fixing jig 9 is brought into contact with the ceiling opening 5, thereby positioning the suspension bolts 2 with respect to the ceiling opening 5. In the third step S13, anti-vibration members 3 are attached to the plurality of suspension bolts 2 fixed by the suspension bolt fixing jig 9. In the fourth step S14, the jig body 10 and guide 40 of the suspension bolt fixing jig 9 are removed from the plurality of suspension bolts 2. In the fifth step S15, the electrical device 1 is fixed to the plurality of suspension bolts 2 to which the anti-vibration members 3 are attached.

[0124] According to this configuration, the suspension bolt fixing jig 9 configured as described above is used to position the suspension bolts 2. Therefore, by engaging the suspension bolts 2 with the engaging portions 12 of the jig body 10, the suspension bolts 2 can be fixed in a predetermined bolt positional relationship. Furthermore, the guides 40 allow the suspension bolts 2 to be positioned relative to the ceiling opening 5. Then, when the suspension bolts 2 are fixed with the jig body 10, the worker P can enter the inter-bolt space S by passing through the opening 11 of the jig body 10. This allows the installation work of the vibration prevention members 3 to be performed within the inter-bolt space S. The work efficiency of installing the vibration prevention members 3 can be improved.

[0125] Second Embodiment A suspension bolt fixing jig 9 according to the second embodiment will be described with reference to Figures 19 and 20. Components common to the first embodiment are given the same reference numerals as those in the first embodiment, and descriptions of overlapping components will be omitted.

[0126] The suspension bolt fixing jig 9 of this embodiment differs from the first embodiment in that the jig body 10 is configured to be foldable.

[0127] In the hanging bolt fixing jig 9, the jig body 10 is formed by joining a plurality of frame members 20. The plurality of frame members 20 are connected to form an opening 11. The plurality of frame members 20 are configured so that two frame members 20 facing each other can be folded.

[0128] As shown in FIG. 19, the jig body 10 includes four frame members 20. The four frame members 20 are divided into third frame members 51 and fourth frame members 52. The jig body 10 includes two third frame members 51 and two fourth frame members 52. The third frame members 51 extend linearly. The third frame members 51 do not have a folding structure. The fourth frame members 52 have a folding structure.

[0129] One of the two fourth frame members 52 is disposed between the two third frame members 51 and is connected to first ends 51A of the two third frame members 51. The other of the two fourth frame members 52 is disposed between the two third frame members 51 and is connected to second ends 51B of the two third frame members 51. Both of the two fourth frame members 52 are connected to the third frame members 51 so as to bend toward the center of the opening 11.

[0130] Specifically, the two ends of the fourth frame member 52 are each connected to the third frame member 51 by a first hinge 53. The first hinge 53 is provided inside a corner formed by the third frame member 51 and the fourth frame member 52, straddling the third frame member 51 and the fourth frame member 52. The rotation axis of the first hinge 53 extends in the vertical direction. The vertical direction is defined as the direction along the vertical direction when the jig body 10 is fixed to the hanging bolt 2.

[0131] As shown in FIG. 20, the fourth frame member 52 is configured to be folded in half. The fourth frame member 52 includes two fifth frame members 55, each half the length of the fourth frame member 52, and a second hinge 54 connecting the two fifth frame members 55. The second hinge 54 is disposed outside the two fifth frame members 55 and is provided so as to straddle the two fifth frame members 55. The rotation axis of the second hinge 54 extends parallel to the direction in which the rotation axis of the first hinge 53 extends. This structure allows the two third frame members 51 to move toward each other while maintaining a parallel state. In this manner, the jig body 10 can be folded.

[0132] The jig body 10 has a plurality of engagement portions 12 that engage with the suspension bolts 2. The engagement portions 12 are arranged around the opening 11 in the same positional relationship as the bolts. In this embodiment, there are two types of engagement portions 12. One of the two types of engagement portions 12 is referred to as a first engagement portion 57. The other of the two types of engagement portions 12 is referred to as a second engagement portion 58.

[0133] Two first engagement portions 57 of the multiple engagement portions 12 are configured as notches cut into the outer peripheral edge 16 of the jig body 10 and extend in the unfolding direction DE of the third frame member 51. The unfolding direction DE is the direction in which the third frame member 51 moves when the jig body 10 is unfolded from the folded state. The two first engagement portions 57 open to the outside of the third frame member 51.

[0134] Two second engagement portions 58 of the multiple engagement portions 12 are configured as notches cut from the outer peripheral edge 16 of the jig body 10, and extend in the deployment direction DE of the third frame member 51. The two second engagement portions 58 are provided on a third frame member 51 different from the third frame member 51 on which the first engagement portion 57 is provided. The two second engagement portions 58 open to the outside of the third frame member 51. The two second engagement portions 58 extend in the opposite direction to the first engagement portions 57, and extend parallel to the first engagement portions 57.

[0135] The jig body 10 is detached from the suspension bolt 2 by folding the two frame members 20 facing each other. The jig body 10 is attached to the suspension bolt 2 by unfolding the two frame members 20 facing each other.

[0136] An adjustment section 30 is provided on the jig body 10. The adjustment section 30 is similar to the adjustment section 30 of the first embodiment. Furthermore, in the suspension bolt fixing jig 9, the configuration of the guide 40 is similar to that of the first embodiment. The guide 40 is attached to the jig body 10 by engaging the claws 46 of the guide 40 with any of the grooves of the adjustment section 30. Attaching the guide 40 to a corner 15 of the jig body 10 fixes the corner 15 of the jig body 10, thereby stabilizing the shape of the jig body 10.

[0137] [Effects of this embodiment] (1) The jig body 10 is configured to be foldable. This configuration makes it easy to transport the suspension bolt fixing jig 9 to the site where it will be used. In addition, since the suspension bolt fixing jig 9 can be compactly packed during storage, the storage space required can be reduced.

[0138] (2) The jig body 10 is composed of a plurality of frame members 20. The plurality of frame members 20 are connected to form the opening 11, and two frame members 20 facing each other are configured to be foldable. This configuration allows the jig body 10 to be made compact easily and quickly.

[0139] (3) The jig body 10 can be attached to or detached from the suspension bolt 2 by folding the two frame members 20 facing each other and unfolding the two frame members 20 facing each other. This configuration allows the jig body 10 to be attached to or detached from the suspension bolt 2 easily and quickly.

[0140] (4) The two first engagement portions 57 are configured as notches cut into the outer peripheral edge 16 of the jig body 10 and extend in the unfolding direction DE of the third frame member 51. The two second engagement portions 58 are configured as notches cut into the outer peripheral edge 16 of the jig body 10 and extend in the unfolding direction DE of the third frame member 51. With this configuration, the jig body 10 can be attached to the suspension bolt 2 by extending it from a folded state. In addition, the jig body 10 can be removed by folding it from an extended state.

[0141] Third Embodiment 21 to 27, a description will be given of a suspension bolt fixing jig 9 according to the third embodiment. Components common to the first and second embodiments are given the same reference numerals as those in the first and second embodiments, and descriptions of overlapping components will be omitted.

[0142] In this embodiment, the guide 60 is different from the guide 40 of the first embodiment. Figures 21 and 22 show the guide 60 of this embodiment.

[0143] In this embodiment, the jig body 10 has a folding structure, which conforms to the structure shown in the second embodiment.

[0144] 23, the jig body 10 is provided with a positioning bolt 62 for positioning the guide 60. Specifically, positioning bolt holes 18 for attaching the positioning bolt 62 are provided at the ends of the two frame members 20 that form the corners 15 of the jig body 10. A guide body 61, which will be described later, is positioned on the jig body 10 by engaging with the head of the positioning bolt 62.

[0145] As shown in FIGS. 21 and 22, the guide 60 includes a guide main body 61 attached to the jig body 10, and a first auxiliary guide 63 and a second auxiliary guide 64 attached movably relative to the guide main body 61.

[0146] In this embodiment, the first direction D1 is defined as a direction intersecting one of the two edges of the corner 6 of the ceiling opening 5. The second direction D2 is defined as a direction intersecting the other of the two edges of the corner 6 of the ceiling opening 5. The state in which the guide main body 61 is attached to the corner 15 of the jig body 10 is referred to as the "attached state of the guide main body 61." In this embodiment, the first direction D1 is perpendicular to the longitudinal direction of the fourth frame member 52 in the attached state of the guide main body 61. The second direction D2 is perpendicular to the longitudinal direction of the third frame member 51 in the attached state of the guide main body 61. The first auxiliary guide 63 is attached to the guide main body 61 so as to be movable in the first direction D1. The second auxiliary guide 64 is attached to the guide main body 61 so as to be movable in the second direction D2. An example of the guide 60 will be described below.

[0147] As shown in FIGS. 21 and 22, the guide main body 61 includes a fixed plate 65 disposed on the upper surface of the jig main body 10, and a guide support portion 66 that supports the first auxiliary guide 63 and the second auxiliary guide 64.

[0148] The fixing plate 65 is provided with a bolt insertion portion 65A through which the suspension bolt 2 is inserted. The fixing plate 65 is fixed to the suspension bolt 2 by tightening a nut 2A with the suspension bolt 2 inserted into the bolt insertion portion 65A. The fixing plate 65 is provided with a first bolt hole 65B through which the positioning bolt 62 is inserted.

[0149] The fixing plate 65 is positioned at the corner 15 of the jig body 10 by fitting the positioning bolt 62 into the first bolt hole 65B. Furthermore, by positioning the fixing plate 65 at the corner 15 of the jig body 10, the angle between the third frame member 51 and the fourth frame member 52 at the corner 15 of the jig body 10 is fixed at 90 degrees.

[0150] The guide support portion 66 has a first guide support portion 67 and a second guide support portion 68 connected to the first guide support portion 67. The guide support portion 66 is provided below the fixed plate 65.

[0151] The first guide support portion 67 and the second guide support portion 68 will be described with reference to FIGS. The first guide support portion 67 movably supports the first auxiliary guide 63. The first guide support portion 67 extends parallel to the third frame member 51 when the guide main body portion 61 is attached. The first guide support portion 67 has a first support plate 71 for supporting the first auxiliary guide 63. The first support plate 71 is configured to be located below the fourth frame member 52 when the guide main body portion 61 is attached. When the guide main body portion 61 is attached, the first support plate 71 extends so as to be perpendicular to the fourth frame member 52 in a plan view (see FIG. 24).

[0152] The first support plate 71 is provided with a second bolt hole 73 through which the bolt 69 is inserted. Two second bolt holes 73 are provided in the first support plate 71. The two second bolt holes 73 are aligned horizontally with a gap between them when the guide main body 61 is attached. The first auxiliary guide 63 is attached to the first support plate 71 by the two bolts 69.

[0153] The second guide support portion 68 movably supports the second auxiliary guide 64. The second guide support portion 68 extends parallel to the fourth frame member 52 when the guide main body 61 is attached. The second guide support portion 68 has a second support plate 72 for supporting the second auxiliary guide 64. The second support plate 72 is configured to be located below the third frame member 51 when the guide main body 61 is attached. When the guide main body 61 is attached, the second support plate 72 extends so as to be perpendicular to the third frame member 51 in a plan view (see FIG. 24).

[0154] The second support plate 72 is provided with a second bolt hole 73 through which the bolt 69 is inserted. Two second bolt holes 73 are provided in the second support plate 72. The two second bolt holes 73 are aligned horizontally with a gap between them when the guide main body 61 is attached. The second auxiliary guide 64 is attached to the second support plate 72 by the two bolts 69.

[0155] The first auxiliary guide 63 has an auxiliary guide main body 75 and an abutment portion 76 that abuts against the edge of the ceiling opening 5. The auxiliary guide main body 75 is formed by a plate that can come into contact with the first support plate 71. The abutment portion 76 is connected to the auxiliary guide main body 75. The abutment portion 76 is configured to be perpendicular to the auxiliary guide main body 75. The first auxiliary guide 63 is formed by bending a metal plate into an L shape.

[0156] The auxiliary guide main body 75 is provided with two bolt grooves 77 through which the bolts 69 are inserted. The two bolt grooves 77 both extend horizontally and are aligned horizontally when the guide main body 61 is attached. Two bolts 69 provided in the first support plate 71 are inserted into the two bolt grooves 77, respectively. The first auxiliary guide 63 is supported by the two bolts 69 and can move relative to the first support plate 71. The first auxiliary guide 63 is fixed to the first support plate 71 by fastening the two bolts 69. The second auxiliary guide 64 has substantially the same structure as the first auxiliary guide 63.

[0157] [Positioning the hanging bolt fixing jig] 25 and 26 show an example of when the suspension bolt fixing jig 9 is fixed to the suspension bolt 2. A first auxiliary guide 63 and a second auxiliary guide 64 are used to position the suspension bolt fixing jig 9 relative to the ceiling opening 5.

[0158] Specifically, guides 60 are attached to each corner 15 of the jig body 10. Then, guides 60 are attached to each corner 15 of the jig body 10 so that the positional relationship (i.e., the planned positional relationship) between the ceiling opening 5 and the jig body 10 is established.

[0159] As a result, when the abutment portion 76 of the first auxiliary guide 63 contacts one edge of the corner 6 of the ceiling opening 5 and the abutment portion 76 of the second auxiliary guide 64 contacts the other edge of the corner 6 of the ceiling opening 5, the jig body 10 is positioned in the expected positional relationship with respect to the ceiling opening 5.

[0160] [Dimensional structure of auxiliary guide] At least one of the first auxiliary guide 63 and the second auxiliary guide 64 has a side defined by a first specified length LA. The first specified length LA is defined as the length from the position where the suspension bolt is fixed on the electrical device 1 to the highest point on the electrical device 1 where it interferes with the suspension bolt 2. Specifically, the suspension bolt fixing position on the electrical device 1 is the position of the suspension bolt mounting portion 1B. The highest point on the electrical device 1 where it interferes with the suspension bolt 2 is the top surface 1C of the electrical device 1.

[0161] 27, at least one of the first auxiliary guide 63 and the second auxiliary guide 64 has a side with a first specified length LA. By using the first auxiliary guide 63 or the second auxiliary guide 64 as a ruler, the position for attaching the anti-vibration member 3 to the suspension bolt 2 can be easily determined.

[0162] With reference to Figure 27, a method for setting the position of the lower end 3A of the anti-vibration member 3 will be described. The position of the electrical device 1 relative to the ceiling 4 is determined by the specifications of the electrical device 1. The electrical device 1 also has a position where it is fixed by a reference nut 2B (hereinafter referred to as the suspension bolt fixing position). Therefore, the position of the nut 2A (hereinafter also referred to as the reference nut 2B) on the suspension bolt 2 that engages with the portion of the electrical device 1 where the suspension bolt is fixed is determined by the specifications of the electrical device 1.

[0163] The anti-vibration member 3 is preferably attached to the suspension bolt 2 so as not to interfere with the electric device 1 and so that the lower end 3A of the anti-vibration member 3 is positioned near the electric device 1. In the vertical direction, the lowest position at which the lower end 3A of the anti-vibration member 3 can be positioned relative to the electric device 1 is determined by the dimensional structure of the electric device 1. Specifically, the lowest position at which the lower end 3A of the anti-vibration member 3 can be positioned relative to the electric device 1 is the highest position at which it interferes with the suspension bolt 2 in the electric device 1. Therefore, in the electric device 1, the lower end 3A of the anti-vibration member 3 cannot be positioned within the range from the suspension bolt fixing position of the electric device 1 to the highest position at which it interferes with the suspension bolt 2 (i.e., the first specified length LA). In this embodiment, the range from the suspension bolt attaching portion 1B to the top surface 1C of the electric device 1 corresponds to the range in which the lower end 3A of the anti-vibration member 3 cannot be positioned.

[0164] In short, the lower end 3A of the anti-vibration member 3 cannot be positioned in the portion of the suspension bolt 2 between the reference nut 2B and the position above the reference nut 2B plus the first specified length LA.

[0165] In this embodiment, at least one of the first auxiliary guide 63 and the second auxiliary guide 64 has a side with the first specified length LA. Therefore, the first auxiliary guide 63 or the second auxiliary guide 64 can be used as a ruler to easily determine a position that is the first specified length LA higher than the reference nut 2B. In this way, the lowest position at which the lower end 3A of the anti-vibration member 3 can be positioned on the suspension bolt 2 can be easily set.

[0166] [Effects of this embodiment] (1) In the hanging bolt fixing jig 9, the guide 60 includes a guide main body 61, a first auxiliary guide 63, and a second auxiliary guide 64. The first auxiliary guide 63 is attached to the guide main body 61 so as to be movable in a first direction D1. The second auxiliary guide 64 is attached to the guide main body 61 so as to be movable in a second direction D2.

[0167] With this configuration, the first auxiliary guide 63 can be brought into contact with one of the two edges of the corner 6 of the ceiling opening 5. The second auxiliary guide 64 can be brought into contact with the other of the two edges of the corner 6 of the ceiling opening 5. In this way, the positions of the first auxiliary guide 63 and the second auxiliary guide 64 can be adjusted independently. This allows the jig body 10 to be positioned appropriately depending on the shape of the ceiling opening 5. Furthermore, because the jig body 10 engages with the ceiling opening 5 via the first auxiliary guide 63 and the second auxiliary guide 64, movement of the jig body 10 from its predetermined position during the installation work of attaching the suspension bolt 2 to the vibration prevention member 3 can be prevented.

[0168] (2) At least one of the first auxiliary guide 63 and the second auxiliary guide 64 has a side that is defined by the first defined length LA.

[0169] The anti-vibration member 3 is attached to the hanging bolt 2 so as not to interfere with the electrical equipment 1. Because the anti-vibration member 3 is attached to the hanging bolt 2 before the electrical equipment 1 is attached to the hanging bolt 2, it is preferable that the range in which the electrical equipment 1 will be placed on the hanging bolt 2 can be easily grasped. In this regard, according to the above configuration, the range in which the electrical equipment 1 will be placed on the hanging bolt 2 can be easily grasped using the first auxiliary guide 63 or the second auxiliary guide 64. This improves the efficiency of the work of attaching the anti-vibration member 3.

[0170] <Modification> In addition to the above-described embodiment, the suspension bolt fixing jig 9 and the method for fixing the electric device 1 according to the present disclosure may be configured as, for example, the following modified examples, or a combination of at least two mutually consistent modified examples.

[0171] A first modified example of the suspension bolt fixing jig 9 according to the first embodiment will be described with reference to FIGS.

[0172] In this modification, the suspension bolt fixing jig 9 further includes an additional guide 80 in addition to the guide 40. The guide 40 is configured so that the additional guide 80 can be attached. The additional guide 80 is attached to the guide 40 so that its position can be adjusted.

[0173] As shown in FIG. 29 , the additional guide 80 has an additional guide main body 81 and an abutment portion 82 that abuts against the edge of the ceiling opening 5. The additional guide main body 81 is formed by a plate that can come into contact with the first hanging portion 48A or the second hanging portion 48B of the guide 40. The abutment portion 82 is connected to the additional guide main body 81. The abutment portion 82 is configured to be perpendicular to the additional guide main body 81. The additional guide 80 is formed by bending a metal plate into an L-shape. The additional guide main body 81 is provided with a bolt hole 83 through which a bolt 89 is inserted. The bolt hole 83 is configured to have just the right size to allow the bolt 89 to pass through while leaving little room for error.

[0174] Additional guide attachment portion 85 is provided on contact portion 42 of guide 40. Specifically, additional guide attachment portion 85 is provided on first hanging portion 48A and second hanging portion 48B of contact portion 42 of guide 40, respectively.

[0175] The additional guide mounting portion 85 is configured so that the additional guide 80 is fixed with a bolt 89. Specifically, the additional guide mounting portion 85 has a bolt positioning portion 86 configured so that the bolt 89 passes through. The bolt positioning portion 86 is configured to pass through the first hanging portion 48A or the second hanging portion 48B. The bolt positioning portion 86 has a first hole 87 and a plurality of second holes 88 that are shorter than the first hole 87. The first hole 87 extends along the longitudinal direction of the first frame member 21 or the longitudinal direction of the second frame member 22 when the guide 40 is attached to the jig body 10. The second hole 88 extends downward from the lower edge of the first hole 87 so as to be perpendicular to the first hole 87. The plurality of second holes 88 are arranged at intervals in a direction along the first hole 87. The first hole 87 and the second hole 88 are configured so that the bolt 89 passes through. The width of the second hole 88 is slightly larger than the diameter of the bolt 89. The bolt 89 can move from one of the plurality of second holes 88 to another via the first hole 87. The bolt 89 is inserted through the bolt hole 83 so as not to move relative to the additional guide 80. By placing the bolt 89 in one of the plurality of second holes 88, the additional guide 80 is positioned relative to the first hanging portion 48A or the second hanging portion 48B of the guide 40. The position of the bolt 89 relative to the first hanging portion 48A or the second hanging portion 48B can be changed by selecting one of the plurality of second holes 88, so that the position of the additional guide 80 relative to the guide 40 can be adjusted.

[0176] [Positioning the hanging bolt fixing jig] 30 shows an example of when the suspension bolt fixing jig 9 is fixed to the suspension bolt 2 when a ceiling opening 5 is formed according to standard dimensions. In this case, the suspension bolt fixing jig 9 can be engaged with the ceiling opening 5 using only the guide 40. For this reason, the additional guide 80 is positioned so that the abutment portion 82 comes into contact with the second hanging portion 48B. In this case, the additional guide 80 is not actually used in positioning the suspension bolt fixing jig 9 relative to the ceiling opening 5.

[0177] FIG. 31 shows an example of when the hanger bolt fixing jig 9 is fixed to the hanger bolt 2 when the ceiling opening 5 is formed in a shape that deviates from the standard dimensions. In this example, the ceiling opening 5 is formed to be longer in the longitudinal direction of the ceiling opening 5 than the standard dimensions. In this case, the hanger bolt fixing jig 9 cannot be engaged with the ceiling opening 5 using only the guide 40. For this reason, an additional guide 80 is used. The additional guide 80 is attached to the second hanging portion 48B of the guide 40 so that the abutment portion 82 contacts the edge of the ceiling opening 5. This allows the hanger bolt fixing jig 9 to be positioned in a predetermined position relative to the ceiling opening 5, and also makes it possible to prevent the hanger bolt fixing jig 9 and the hanger bolt 2 from moving relative to the ceiling opening 5.

[0178] [Effects of this modified example] When the guide 40 is provided with the additional guide 80 as in this modified example, the following effects are obtained. If the ceiling opening 5 has a shape that does not conform to the standard dimensions, or if the shape and dimensions of the ceiling opening 5 deviate from the standard, the guide 40 may not be able to accurately position the jig body 10 relative to the ceiling opening 5.

[0179] In this regard, according to the present modified example, the jig body 10 can be accurately positioned relative to the ceiling opening 5 by abutting the additional guide 80 against the edge of the ceiling opening 5. Furthermore, because the jig body 10 engages with the ceiling opening 5 via the additional guide 80, movement of the jig body 10 from its predetermined position during the installation work of attaching the suspension bolt 2 to the anti-vibration member 3 can be suppressed.

[0180] A second modified example of the suspension bolt fixing jig 9 according to the first embodiment will be described with reference to Fig. 32. In the first embodiment, the jig body 10 is configured to be attachable to or detachable from the suspension bolt 2 by rotation. In contrast, as shown in Fig. 32, the jig body 10 may be configured to be attachable to or detachable from the suspension bolt 2 by moving in a direction intersecting the suspension bolt 2.

[0181] The engaging portions 12 are configured as notches cut into the outer peripheral edge 16 or the inner peripheral edge 17 of the jig body 10. The multiple engaging portions 12 extend in the same direction.

[0182] Specifically, two of the four engagement portions 12 are configured as third engagement portions 91 cut into the outer peripheral edge 16. The third engagement portions 91 open to the outer peripheral edge 16 of the jig body 10. The two third engagement portions 91 extend parallel to each other.

[0183] The other two of the four engagement portions 12 are configured as fourth engagement portions 92 cut into the inner peripheral edge 17. The fourth engagement portions 92 open to the inner peripheral edge 17 of the jig body 10. The two fourth engagement portions 92 extend parallel to the third engagement portions 91. The two fourth engagement portions 92 open in the same direction as the third engagement portions 91.

[0184] [Effects of this modified example] According to this configuration, the jig body 10 can be removed in a direction intersecting the extension direction of the suspension bolt 2. Therefore, the jig body 10 can be removed from the suspension bolt 2 more easily and quickly than when the jig body 10 is lowered along the extension direction of the suspension bolt 2.

[0185] Furthermore, the multiple engaging portions 12 extend in the same direction. Therefore, by sliding the jig body 10 in a direction intersecting the extension direction of the suspension bolt 2 (for example, horizontally), the jig body 10 can be removed in the direction intersecting the extension direction of the suspension bolt 2.

[0186] The guide 40 according to the first embodiment is attached to a jig body 10 that does not have a folding structure. The guide 40 according to the first embodiment may be attached to a jig body 10 that has a folding structure as shown in the second embodiment.

[0187] The first embodiment discloses a structure of the engagement portion 12 that enables the jig body 10 to be attached to or detached from the suspension bolt 2 by rotating the jig body 10. Such a structure of the engagement portion 12 may be applied to the jig body 10 having a folding structure shown in the second embodiment.

[0188] 32 discloses a structure of the engagement portion 12 that allows the jig body 10 to be attached to or detached from the suspension bolt 2 by sliding the jig body 10. Such a structure of the engagement portion 12 may be applied to the jig body 10 having the folding structure shown in the second embodiment.

[0189] In the second embodiment, the fourth frame member 52 of the jig body 10 has a two-fold structure. Specifically, the fourth frame member 52 is foldable relative to the third frame member 51 and has a structure that allows it to be folded in half. In this structure, the rotation axis of one folding rotation of the fourth frame member 52 relative to the third frame member 51 is the same as the rotation axis of the other folding rotation of one half of the fourth frame member 52 relative to the other half.

[0190] In contrast to this, the jig body 10 may be configured as follows. The fourth frame member 52 is foldable relative to the third frame member 51 and has a structure that allows it to be folded in half. In this structure, the axis of rotation when one half of the fourth frame member 52 is rotated relative to the other half is perpendicular to the longitudinal direction of the fourth frame member 52 and extends parallel to the longitudinal direction of the third frame member 51. In this case, the two fifth frame members 55 that make up the fourth frame member 52 are connected to each other by hinges that are arranged on the upper surface portions 25 of the fifth frame members 55. This structure also allows the jig body 10 to be folded compactly.

[0191] Alternatively, the jig body 10 may have one folding structure as follows. In the jig body 10, the fourth frame member 52 is configured to be folded in half. The axis of rotation for folding one half of the fourth frame member 52 relative to the other half is perpendicular to the longitudinal direction of the fourth frame member 52 and extends parallel to the longitudinal direction of the third frame member 51. The two fifth frame members 55 that make up the fourth frame member 52 are connected to each other by a hinge disposed on the top surface portion 25 of the fifth frame member 55. With this structure, the jig body 10 can be folded compactly.

[0192] In the third embodiment, the guide 60 is attached to the jig body 10 having a folding structure. The guide 60 according to the third embodiment can also be applied to a jig body 10 that does not have the folding structure shown in the first embodiment.

[0193] The guide 60 of the third embodiment includes a guide main body 61 attached to the jig body 10, and a first auxiliary guide 63 and a second auxiliary guide 64. The first auxiliary guide 63 and the second auxiliary guide 64 are provided on the guide main body 61. Alternatively, the first auxiliary guide 63 and the second auxiliary guide 64 may be provided independently on the jig body 10. For example, the guide main body 61 is divided into two parts. The first auxiliary guide 63 and the second auxiliary guide 64 are attached to two frame members 20, respectively, via divided bodies of the guide main body 61. The first auxiliary guide 63 and the second auxiliary guide 64 are attached to the frame members 20 so as to be movable in a direction perpendicular to the frame members 20.

[0194] In the first embodiment, the jig body 10 may be provided with the additional guide 80 of the above-described modified example, as well as the first auxiliary guide 63 and the second auxiliary guide 64 described in the third embodiment. In one example, the additional guide 80, the first auxiliary guide 63, and the second auxiliary guide 64 are arranged offset in the vertical direction so as not to interfere with each other. One of the first auxiliary guide 63 and the second auxiliary guide 64 may be provided on the additional guide 80.

[0195] The above describes an embodiment and its modified examples of the hanging bolt fixing jig 9 and the method for fixing the electrical equipment 1. However, it will be understood that various modifications of the form and details are possible without departing from the spirit and scope of the hanging bolt fixing jig 9 and the method for fixing the electrical equipment 1 as set forth in the claims. [Explanation of symbols]

[0196] C...circle, DE...deployment direction, LA...first specified length, 1...electrical equipment, 2...hanging bolt, 3...vibration prevention member, 4...ceiling, 5...ceiling opening, 6...corner, 9...hanging bolt fixing jig, 10...jig body, 11...opening, 12...engagement portion, 15...corner, 16...outer peripheral edge, 17...inner peripheral edge, 20...frame member, 29...mark, 30...adjustment portion, 40...guide, 41...guide body portion, 42...contact portion, 57...first engagement portion, 58...second engagement portion, 60...guide, 61...guide body portion, 63...first auxiliary guide, 64...second auxiliary guide, 76...contact portion, 80...additional guide, 82...contact portion.

Claims

1. A suspension bolt fixing jig (9) for fixing a plurality of suspension bolts (2) supporting electrical equipment (1) in a building in a predetermined bolt positional relationship, a jig body (10) fixed to the lower portions of the plurality of hanging bolts (2); The jig body (10) has a plurality of engagement portions (12) that engage with the hanging bolts (2) and an opening (11) configured to allow a person to enter; The engaging portion (12) is arranged around the opening (11) so as to have the same positional relationship as the bolt. Hanging bolt fixing jig.

2. The jig body (10) is configured to be disassembled or foldable. The suspension bolt fixing jig according to claim 1.

3. The jig body (10) can be attached to or detached from the suspension bolt (2) by moving in a direction intersecting the suspension bolt (2) or by rotating on a plane intersecting the suspension bolt (2). The suspension bolt fixing jig according to claim 1.

4. The engagement portion (12) is configured as a notch cut from the outer peripheral edge (16) or the inner peripheral edge (17) of the jig body (10). The suspension bolt fixing jig according to claim 3.

5. The plurality of engagement portions (12) extend, in a plan view, along a circle (C) having a center at a point equidistant from the plurality of engagement portions (12). The suspension bolt fixing jig according to claim 4.

6. The plurality of engagement portions (12) extend in the same direction. The suspension bolt fixing jig according to claim 4.

7. The jig body (10) is composed of a plurality of frame members (20), The plurality of frame members (20) are disassemblably connected to form the opening (11). The suspension bolt fixing jig according to claim 1.

8. The jig body (10) is composed of a plurality of frame members (20), The plurality of frame members (20) are connected to form the opening (11), and two of the frame members (20) facing each other are configured to be foldable. The suspension bolt fixing jig according to claim 1.

9. The jig body (10) can be attached to or detached from the suspension bolt (2) by folding the two frame members (20, 52) facing each other and unfolding the two frame members (20, 52) facing each other. The suspension bolt fixing jig according to claim 8.

10. Some first engaging portions (57) of the plurality of engaging portions (12) are configured as notches cut from the outer peripheral edge (16) of the jig body (10) and extend in the deployment direction (DE) of the frame member (20); The second engaging portions (58) other than the first engaging portions (57) among the plurality of engaging portions (12) are configured as notches cut from the outer peripheral edge (16) of the jig body (10) and extend in the deployment direction (DE) of the frame member (20). The suspension bolt fixing jig according to claim 9.

11. A mark (29) is provided on the jig body (10) at a midpoint between two adjacent engagement portions (12). The suspension bolt fixing jig according to claim 1.

12. The electrical equipment (1) is disposed in a rectangular ceiling opening (5) provided in a ceiling (4) of the building and formed in accordance with the size of the electrical equipment (1), The jig body (10) is configured to have a size that allows it to be inserted into the ceiling opening (5). The suspension bolt fixing jig according to claim 1.

13. The jig further includes guides (40, 60) for positioning the jig body (10) relative to a location in the building where the electrical equipment (1) is to be placed. The suspension bolt fixing jig according to claim 1.

14. The electrical equipment (1) is disposed in a rectangular ceiling opening (5) provided in a ceiling (4) of the building and formed in accordance with the size of the electrical equipment (1), The jig body (10) has a rectangular outer shape in a plan view, The guides (40, 60) are provided at the corners (15) of the jig body (10). The suspension bolt fixing jig according to claim 13.

15. The guides (40, 60) are configured to be able to contact two edges of the corners (6) of the ceiling opening (5) and extend to a position below the ceiling opening (5). The suspension bolt fixing jig according to claim 14.

16. The guide (40) includes a guide body portion (41) attached to the jig body (10), and a contact portion (42) extending from the guide body portion (41) and configured to be able to contact two edges of a corner portion (6) of the ceiling opening (5). The suspension bolt fixing jig according to claim 13.

17. The guide (40) further includes an additional guide (80) that is attached to the guide body portion (41) so that its position can be adjusted, The additional guide (80) has an abutment (82) that is abutted against the edge of the ceiling opening (5). The suspension bolt fixing jig according to claim 16.

18. The jig body (10) is provided with an adjustment section (30) that can adjust the position of the guides (40, 60). The suspension bolt fixing jig according to claim 13.

19. The guides (40, 60) are configured to be detachable from the jig body (10). The suspension bolt fixing jig according to claim 13.

20. The guide (60) includes a guide main body (61) attached to the jig main body (10), and a first auxiliary guide (63) and a second auxiliary guide (64) attached movably to the guide main body (61), The first auxiliary guide (63) is attached to the guide body (61) so as to be movable in a direction intersecting one of the two edges of the corner portion (6) of the ceiling opening (5), The second auxiliary guide (64) is attached to the guide body (61) so as to be movable in a direction intersecting the other of the two edges of the corner portion (6) of the ceiling opening (5). The suspension bolt fixing jig according to claim 13.

21. At least one of the first auxiliary guide (63) and the second auxiliary guide (64) has a side defined by a first defined length (LA), The first specified length (LA) is specified as the length from the fixing position of the suspension bolt in the electrical equipment (1) to the highest position in the electrical equipment (1) that interferes with the suspension bolt (2). The suspension bolt fixing jig according to claim 20.

22. A method for fixing an electrical device (1) to a plurality of hanging bolts (2) using a hanging bolt fixing jig (9), comprising: The suspension bolt fixing jig (9) is the suspension bolt fixing jig (9) according to any one of claims 1 to 11, a first step of fixing a plurality of suspension bolts (2) supporting the electrical equipment (1) in a building in a predetermined bolt positional relationship using the suspension bolt fixing jig (9); a second step of attaching vibration-proof members (3) to the plurality of hanging bolts (2) fixed by the hanging bolt fixing jig (9); a third step of removing the suspension bolt fixing jig (9) from the plurality of suspension bolts (2); and a fourth step of fixing the electrical equipment (1) to the plurality of suspension bolts (2) to which the vibration-proof members (3) are attached. How to secure electrical equipment.

23. A method for fixing an electrical device (1), comprising fixing the electrical device (1) to a plurality of hanging bolts (2) using a hanging bolt fixing jig (9), and placing the electrical device (1) in a ceiling opening (5), The suspension bolt fixing jig (9) is the suspension bolt fixing jig (9) according to any one of claims 12 to 20, a first step of fixing a plurality of suspension bolts (2) supporting the electrical equipment (1) in a building in a predetermined bolt positional relationship using the jig body (10) of the suspension bolt fixing jig (9); a second step of positioning the suspension bolt (2) relative to the ceiling opening (5) by bringing the guides (40, 60) of the suspension bolt fixing jig (9) into contact with the ceiling opening (5); a third step of attaching vibration-proof members (3) to the plurality of hanging bolts (2) fixed by the hanging bolt fixing jig (9); a fourth step of removing the jig body (10) and the guides (40, 60) of the suspension bolt fixing jig (9) from the plurality of suspension bolts (2); and a fifth step of fixing the electrical equipment (1) to the plurality of suspension bolts (2) to which the vibration-proof members (3) are attached. How to secure electrical equipment.

Images