JP7558482B2 - How to install lighting fixtures, how to renovate buildings, and how to construct buildings - Google Patents

Description

The present invention relates to a method for changing the installation of lighting fixtures in a building, a method for creating a building with lighting fixtures installed, a method for renovating a building by changing the lighting installation, and a method for creating a renovated building.

Lighting is an essential element in office buildings, factories, commercial facilities, and almost all buildings. In many countries, buildings are required to meet certain standards when they are constructed. For example, in Japan, there are laws such as the Building Standards Act and the Fire Service Act, which stipulate rules that must be followed. Buildings that do not meet the standards are considered illegal, and their use is restricted.

Buildings and other structures are constructed through a process that includes foundation work, structural work, finishing work, and equipment work. After the structural work is complete, electrical equipment such as lighting and air conditioning, and water supply and drainage systems are installed according to a set design.

Even after a building is completed, if the installed lights stop working, it may be necessary to replace them with new lights of the same model. However, unlike such a simple replacement, it would be a major undertaking to make major changes to the layout or type of lighting in response to changes or renovations to the design of the interior space.

Patent Document 1 discloses a technology aimed at making it easy to remodel when rearranging the interior of a room. The method disclosed in Patent Document 1 aims to achieve this objective by providing dedicated ceiling materials for partitions, lighting, and air conditioning, respectively, and making these ceiling materials compatible. In addition, the power supply to the lighting and air conditioning is based on the premise that multiple outlets have already been installed in appropriate positions above the ceiling.

JP 62-33959 A

The present invention discloses technology that makes it easy to change or rearrange lighting fixtures installed in a building.

The method disclosed as one embodiment is a method for changing the installation of a lighting fixture installed in a building, and includes a step of removing the lighting fixture installed in a ceiling material that forms a ceiling from the ceiling material, a step of removing the lighting fixture connected to a hanging material in the attic space from the hanging material to leave the hanging material and the lighting fixture disconnected, a step of disconnecting electrical wiring that is arranged in the attic space and electrically connected to the lighting fixture from the lighting fixture, and a step of providing electrical wiring with a connector as the electrical wiring for electrically connecting to a lightweight large lighting fixture. the step of removing the ceiling material forming the ceiling on which the removed lighting fixture was installed and installing another ceiling material to re-form the ceiling; the step of electrically connecting the connector-equipped electrical wiring arranged in the attic space to the lightweight, large-sized lighting fixture through an opening provided in the other ceiling material; and the step of installing the lightweight, large-sized lighting fixture, which is not connected to a hanging material and is electrically connected to the connector-equipped electrical wiring, in the opening in the ceiling material using a fastener provided on the lightweight, large-sized lighting fixture.

In addition, a method disclosed as one embodiment is a method for constructing a building in which lightweight large-sized lighting fixtures are installed, the method comprising the steps of: removing a lighting fixture installed in a ceiling material forming a ceiling from the ceiling material; removing the lighting fixture connected to a hanging material in the attic space from the hanging material to leave the hanging material and the lighting fixture disconnected; disconnecting electrical wiring arranged in the attic space and electrically connected to the lighting fixture from the lighting fixture; providing electrical wiring with a connector as the electrical wiring for electrically connecting to the lightweight large-sized lighting fixture. the step of removing the ceiling material forming the ceiling on which the removed lighting fixture was installed and installing another ceiling material to re-form the ceiling; the step of electrically connecting the connector-equipped electrical wiring arranged in the attic space to the lightweight, large-sized lighting fixture through an opening provided in the other ceiling material; and the step of installing the lightweight, large-sized lighting fixture, which is not connected to a hanging material and is electrically connected to the connector-equipped electrical wiring, in the opening in the ceiling material using a fastener provided on the lightweight, large-sized lighting fixture.

In addition, a method disclosed as one embodiment is a method for renovating a building by changing the installation of lighting from a lighting fixture to a lightweight large lighting fixture, the method including a step of removing the lighting fixture installed in a ceiling material forming a ceiling from the ceiling material, a step of removing the lighting fixture connected to a hanging material in the attic space from the hanging material to leave the hanging material and the lighting fixture disconnected, a step of disconnecting electrical wiring arranged in the attic space and electrically connected to the lighting fixture from the lighting fixture, and a step of connecting the electrical wiring to the lightweight large lighting fixture. the step of providing electrical wiring with a connector; the step of removing the ceiling material forming the ceiling in which the removed lighting fixture was installed and installing another ceiling material to re-form the ceiling; the step of electrically connecting the electrical wiring with a connector arranged in the attic space to the lightweight, large lighting fixture through an opening provided in the other ceiling material; and the step of installing the lightweight, large lighting fixture, which is not connected to a hanging material and is electrically connected to the electrical wiring with a connector, in the opening in the ceiling material using a fastener provided on the lightweight, large lighting fixture.

In addition, a method disclosed as one embodiment is a method for creating a renovated building having a ceiling formed by arranging a plurality of ceiling materials, a lightweight large-sized lighting fixture installed through an opening in the ceiling material, and a hanging material that is arranged in an area surrounded by the outer frame of the ceiling material in which the lightweight large-sized lighting fixture is installed in a top view in the attic space and is not connected to the lightweight large-sized lighting fixture, the method comprising the steps of: removing the lighting fixture installed in the ceiling material that forms the ceiling from the ceiling material; removing the lighting fixture connected to the hanging material in the attic space from the hanging material to leave the hanging material and the lighting fixture disconnected; and removing an electrical wiring that is arranged in the attic space and is electrically connected to the lighting fixture. the step of disconnecting a wire from the lighting fixture; providing electrical wiring with a connector as the electrical wiring for electrically connecting to the lightweight, large lighting fixture; removing the ceiling material which forms the ceiling and in which the removed lighting fixture was installed, and installing another ceiling material to re-form the ceiling; electrically connecting the electrical wiring with connector arranged in the attic space to the lightweight, large lighting fixture through an opening provided in the other ceiling material; and installing the lightweight, large lighting fixture, which is not connected to a hanging material and is electrically connected to the electrical wiring with connector, in the opening in the ceiling material using a fastener provided on the lightweight, large lighting fixture.

A method disclosed as one embodiment is a method for constructing a renovated building having a ceiling formed by arranging a plurality of ceiling materials, a lightweight large-sized lighting fixture installed through an opening in the ceiling material, and an insert that is embedded in a structure within an area surrounded by the outer frame of the ceiling material in which the lightweight large-sized lighting fixture is installed in a top view in the attic space and is not connected to a hanging material, the method comprising the steps of: removing the lighting fixture installed in the ceiling material that forms the ceiling from the ceiling material; removing the lighting fixture that is connected to the hanging material in the attic space from the hanging material to leave the hanging material and the lighting fixture disconnected; disconnecting electrical wiring that is arranged in the attic space and electrically connected to the lighting fixture from the lighting fixture; the step of removing the hanging material from which the lighting fixture has been removed, from the insert; providing electrical wiring with a connector as the electrical wiring for electrically connecting to the lightweight, large lighting fixture; the step of removing the ceiling material forming a ceiling in which the removed lighting fixture was installed and installing another ceiling material to re-form the ceiling; the step of electrically connecting the electrical wiring with a connector disposed in the attic space to the lightweight, large lighting fixture through an opening provided in the other ceiling material; and the step of installing the lightweight, large lighting fixture, which is not connected to the hanging material and is electrically connected to the electrical wiring with a connector, in the opening of the ceiling material using a fastener provided on the lightweight, large lighting fixture.

According to the present invention, it is possible to easily change or rearrange lighting fixtures installed in a building.

FIG. 1 is a schematic diagram showing an example of the structure of a room in a building before the lighting installation is changed. FIG. 2 is a schematic diagram showing an example of the structure of the ceiling of a room in the building in the state shown in FIG. FIG. 3 is a flow diagram for explaining the process up to the construction of the building of FIG. FIG. 4 is a schematic diagram showing an example of the structure of a room in a building after changing the lighting installation according to the first embodiment. FIG. 5 is a schematic perspective view of the illumination fixture. FIG. 6 is a schematic diagram for explaining the structure of the illumination fixture. FIG. 7 is a schematic perspective view of a light source mounted in an illumination fixture. FIG. 8 is a flow diagram for explaining the construction process of a building according to the first embodiment. FIG. 9 is a schematic diagram showing an intermediate state in the flow of FIG. FIG. 10 is a schematic diagram showing a state midway through the flow of FIG. FIG. 11 is a schematic diagram showing a state midway through the flow of FIG. FIG. 12 is a schematic diagram showing a state midway through the flow of FIG. FIG. 13 is a schematic diagram showing a state midway through the flow of FIG. FIG. 14 is a schematic diagram showing a state midway through the flow of FIG. FIG. 15 is a schematic diagram showing a state midway through the flow of FIG. FIG. 16 is a schematic diagram showing the mounting fixture. FIG. 17 is a schematic diagram showing a state where the mounting fixture is used. FIG. 18 is a schematic diagram showing an electrical connection configuration of an illumination fixture according to the second embodiment. FIG. 19 is a schematic diagram showing an example of the structure of a room in a building after changing the lighting installation according to the third embodiment. FIG. 20 is a flow diagram for explaining the construction process of a building according to the third embodiment. FIG. 21 is a schematic diagram showing a state midway through the flow of FIG. FIG. 22 is a schematic diagram showing an example of the structure of a room in a building after changing the lighting installation according to the fourth embodiment. FIG. 23 is a flow diagram for explaining the construction process of a building according to the fourth embodiment. FIG. 24 is a flow diagram for explaining the construction process of a building according to the fourth embodiment. FIG. 25 is a flow diagram for explaining the construction process of a building according to the fourth embodiment. FIG. 26 is a schematic diagram showing an intermediate state in the flow of FIG.

The following describes the form for carrying out the present invention with reference to the drawings. However, the form described below is intended to embody the technical concept of the present invention and does not limit the present invention. Furthermore, in the following description, the same names and symbols indicate the same or similar components, and detailed description will be omitted as appropriate. Note that the size and positional relationship of the components shown in each drawing may be exaggerated to clarify the description.

Figure 1 is a schematic diagram showing a room in a building 1 before the lighting installation has been changed. Figure 2 is a schematic diagram showing the structure of the ceiling in the room of building 1 in the state shown in Figure 1. To avoid complicating the diagram, Figure 2 shows the structure of the ceiling in only half of the entire ceiling shown in Figure 1, and omits some of the hanging materials and wiring.

Building 1 is assumed to have a multi-story structure with corridors and rooms, like a typical office building, but is not limited to this. For example, it may be a one-story building. Changes to the lighting installation may include changing the lighting itself to a different lighting, or changing the location where the lighting is installed.

In the building 1, the habitable room forms a space with a floor 2 as the underside, walls 3 as the sides, a ceiling 4 as the top, and windows 5 as the sides. Hereinafter, the space between the floor 2 as the underside and the ceiling 4 as the top will be referred to as the habitable room space. Note that it is also possible for the room to have no windows 5 and only walls 3 as the sides. In addition, multiple air conditioning devices 90 and multiple lighting fixtures 99 are installed on the ceiling 4. Note that there may be only one air conditioning device 90.

In the building 1, the attic forms a space with the ceiling 4 as the underside and the structure 6 as the upper and side surfaces. Hereinafter, the space between the ceiling 4, which forms the underside, and the structure 6, which forms the upper surface, is referred to as the attic space. In the attic space, multiple hanging members 20 connected to the ceiling insert of the structure 6 are provided. The hanging members 20 include hanging member 21 connected to the rough joists, hanging member 22 connected to the air conditioning equipment 90, and hanging member 23 connected to the lighting fixtures 99.

The ceiling 4 is formed by arranging a number of ceiling materials 40. The ceiling materials 40 are supported by hanging materials 21. The hanging materials 21 are connected to the ceiling insert of the structure 6, the joists are connected to the hanging materials 21, the ceiling materials 40 are attached to the joists, and the ceiling materials 40 are fixed in place.

In addition, a plurality of electrical wirings 50 are provided in the attic space through piping to supply power to electrically connected devices such as air conditioners 90 and lighting fixtures 99. Communication wiring for connection to a network may also be provided.

The air conditioning equipment 90 and the lighting fixtures 99 are installed on the ceiling 4 by fitting them into openings formed in the ceiling material 40. The air conditioning equipment 90 is connected to the hanging material 22, and the lighting fixtures 99 are connected to the hanging material 23. The air conditioning equipment 90 and the lighting fixtures 99 are each connected to electrical wiring 50 to receive a power supply.

The living space can also be said to be a space that has the ceiling 4 as part of the space and is located below the ceiling 4. The attic space can also be said to be a space that has the ceiling 4 as part of the space and is located above the ceiling 4.

Figure 3 is a flow diagram for explaining the process up to the construction of building 1 in the state of Figures 1 and 2. Here, a typical example from the state of a vacant lot to the construction of building 1 is explained. In the construction of a large building such as an office building, a general construction company is contracted to place an order for the construction work and coordinates the entire construction work carried out by various contractors.

First, the design of building 1 is done by an architect or designer (Step S1). In this process, the layout of corridors and rooms is decided, and the overall design of building 1 is recorded on the design drawings. In addition, the building materials to be used and electrical equipment such as lighting fixtures are also decided to some extent, and their placement is also recorded on the drawings.

Next, based on the determined design, building materials and construction machinery are prepared, and foundation work is carried out (step S2). In this process, pile work and earthwork are used to ensure a stable foundation that can withstand the weight of the building. This work is mainly carried out by workers from civil engineering contractors. Note that this work is not limited to civil engineering contractors, but also involves workers from other contractors.

Next, structural work is carried out to form the framework 6 of building 1 on stable ground (step S3). Structural work begins with the foundations and, if there is a basement, the basement, and progresses to the above-ground floors. The overall framework of building 1 is completed by pouring concrete, erecting columns, assembling steel frames, etc. Concrete is also poured into the exterior walls, roof, under the floors of each floor, etc.

During structural work, inserts are embedded to connect hanging materials 20 such as suspension bolts during subsequent interior work. For example, ceiling inserts for fixing suspension bolts are fixed as part of the floor slab (such as a reinforced concrete floor panel) when the slab is poured for the upper floor. The work here is mainly carried out by workers from civil engineering contractors and concrete construction contractors.

Next, exterior construction of the building 1 is carried out (step S4). The exterior shape of the building 1 is formed through the exterior construction. Tiling of the exterior walls, installation of window sashes, window glass, curtain walls, etc. are also carried out. Painting, etc. are also carried out.

Next, the interior construction work is carried out (step S5). In the interior construction work, the floor 2, walls 3, and ceiling 4 are constructed. In the ceiling construction work to install the ceiling 4, the hanging material 20 is connected to the ceiling insert installed in the structural work of step S3. Furthermore, the rough girders assembled in a lattice pattern using light steel frame materials or the like are connected to and supported by the hanging material 21. Then, the ceiling material 40 such as ceiling boards and ceiling underlayment material is attached. By supporting the ceiling material 40 to the hanging material 21 via the rough girders, measures are taken to prevent the risk of the ceiling material 40 falling off.

For example, in Japan, regulations to prevent ceilings from falling are set out in the Building Standards Act and Enforcement Orders. One of these regulations is that when installing ceiling materials that meet certain conditions, measures to prevent falling off must be taken, such as fixing them with hanging materials. In addition, when installing lighting fixtures or air conditioning equipment on the ceiling, these ceiling-mounted devices must also be directly connected to hanging materials and fixed in place, depending on their size and weight.

As a typical conventional example, light-weight ceiling-mounted fixtures such as surveillance cameras, emergency lighting, or smoke detector sensors can be installed on the ceiling without being connected to a suspension material such as a suspension bolt. In this case, almost the entire weight of the ceiling-mounted fixture is borne by the ceiling material.

On the other hand, for heavy ceiling-mounted fixtures such as recessed base lighting like the lighting fixture 99 or ceiling-mounted base lighting, or air-conditioning equipment 90, the ceiling-mounted fixture itself is connected to a hanging material and fixed in place before being installed on the ceiling material. In this case, the hanging material connected to the ceiling-mounted fixture supports almost the entire load of the ceiling-mounted fixture.

In addition, instead of installing the ceiling insert when the concrete is poured, the hanging material 20 can be fixed by driving anchors into the concrete after pouring. However, in terms of efficiency and safety, it is preferable to install it in advance. For locations where it is known that hanging materials will be installed, it is preferable that the placement of the ceiling insert be decided at the design stage and that it be embedded when the concrete is poured.

In addition, during the interior construction work, before the formation of the ceiling 4 using the ceiling material 40 is completed, work is also carried out to hang pipes and air conditioning ducts, and to run electrical wiring through the pipes. Work is also carried out to install electrical wiring 50 in the attic space.

In the wiring work to install the electrical wiring 50, the worker installs the required number of electrical wiring 50 based on the design drawings. The required number of electrical wiring 50 is determined according to the number of electrically connected devices to be installed, such as air conditioning equipment 90 and lighting fixtures 99, to be installed above the ceiling.

These tasks may be carried out after the formation of the ceiling 4 is complete. However, if the work space in the attic is narrow, it will be difficult to carry out these tasks. On the other hand, since the attic is a space where people do not normally enter, it is not advisable to make the work space too large.

Here, tasks such as installing ducts in the ceiling and fixing the ceiling material 40 with the hanging material 21 are performed by workers from a contractor who performs interior construction work. On the other hand, the work of laying the electrical wiring 50 is performed by specialized workers who are able to perform electrical work, as there is a risk of electric shock. In Japan, people who are not qualified as electricians are not permitted to perform electrical work such as wiring work. Safety is taken into consideration when constructing a building by having various specialized contractors each perform their specialized work.

Next, once the interior work is complete and the floors 2, walls 3 and ceilings 4 are completed, installation work begins (step S6). During installation work, various facilities that will be required when the building 1 is actually used are installed. For example, facilities for electricity, gas, water, drainage, air conditioning, toilets, disaster prevention, broadcasting, etc., as well as lighting, escalators, elevators, etc. are installed. This work is carried out by workers from businesses such as electrical work, telecommunications work, water facility work, fire protection facility work, and cleaning facility work.

The lighting fixture manufacturer then manufactures the lighting fixtures 99 needed for construction in time for the lighting installation work, and delivers them to an electrical materials trading company that manages electrical equipment materials (step S7). The electrical materials trading company manages inventory of materials other than lighting fixtures, such as switches, outlets, wires, cables, distribution boards, antennas, as well as distribution boards, intercoms, fire alarms, etc., and supplies only the required amount of electrical equipment materials needed for the installation work (step S8).

In air conditioning installation work, air conditioning equipment 90 is installed in the ceiling 4. A worker connects the air conditioning equipment 90 to the hanging material 22, and fits the air conditioning equipment 90 into an opening formed in the ceiling 4 while the air conditioning equipment 90 is connected to the hanging material 22.

In lighting installation work, the lighting fixture 99 is installed on the ceiling 4. The worker connects the lighting fixture 99 to the hanging material 23, and with the lighting fixture 99 connected to the hanging material 23, fits the lighting fixture 99 into an opening formed in the ceiling 4, and installs the lighting fixture 99 on the ceiling 4. By connecting the lighting fixture 99 to the hanging material 23, the lighting fixture 99 is fixed to the structure 6 via the hanging material 23.

The openings in the ceiling 4 for installing the air conditioning equipment 90 and the lighting fixtures 99 can be formed by drilling holes in the ceiling material 40. The openings in the ceiling material 40 may be provided during the ceiling installation work instead of during the equipment installation work.

In addition, when installing electrically connected devices such as air conditioners 90 and lighting fixtures 99, the electrically connected devices are also connected to the electrical wiring 50. This allows the electrically connected devices to be electrically connected to an external power source via the electrical wiring 50 and to receive power from the external power source.

When the work of connecting the electrical wiring 50 is performed while the lighting fixture 99 is connected to the hanging material 23, the work can be performed while the lighting fixture 99 is in a stable state. Also, since the electrical wiring 50 is arranged in the attic space, it is preferable to complete the connection with the electrical wiring 50 before fitting the lighting fixture 99 into the opening in the ceiling material 40. If the lighting fixture 99 is fitted in beforehand, the work of connecting the electrical wiring 50 must be performed in the attic space, which makes the work difficult.

The work of connecting the electrical wiring 50 here is also performed by a professional worker capable of electrical work, as there is a risk of electric shock. For example, in Japan, a worker qualified as an electrician connects the electrical wiring 50 to the power adapter of the lighting fixture 99. Another worker may perform the process up to connecting it to the hanging material 23, or a worker qualified as an electrician may perform the process from connecting it to the hanging material 23 to installing it on the ceiling 4.

In the case of a building 1 such as an office building, a design may be considered in which small ceiling-mounted fixtures such as downlights are provided for lighting narrow spaces such as corridors, while large base lights such as lighting fixture 99 are provided in large spaces such as living rooms. Although small lighting fixtures may be provided in parts of a living room, it is more effective to employ large lighting fixtures to efficiently illuminate the entire room.

First Embodiment
Next, the installation process of the lighting fixtures in the building according to the first embodiment will be described. Fig. 4 is a schematic diagram showing a room in the building 1 after the lighting installation has been changed. In the installation process according to the first embodiment, in order to make the explanation easier to understand, the process of changing the lighting installation from the state shown in Figs. 1 and 2 to the state shown in Fig. 4 will be described as an example.

After the installation change, in building 1, the lighting fixtures installed on the ceiling 4 have been changed from lighting fixture 99 to lighting fixture 10. In other words, the lighting installation has been changed from lighting fixture 99 to lighting fixture 10, and building 1 has been renovated. Lighting fixture 10 has also been installed in a place (ceiling material 40) where it was not installed before the installation change. When viewed from the living space side, no other changes have been made.

The layout of the room may also be changed in other ways. For example, the installation positions or number of air conditioners 90 may be changed, the ceiling material 40 may be completely replaced, the window glass may be replaced, or the floor tiles may be replaced. Furthermore, lighting fixtures may not be installed in places where lighting fixtures were not installed before the installation change, or lighting fixtures may be removed from places where lighting fixtures were installed before the installation change.

Here, we will explain the lighting fixture 10. The lighting fixture 10 has the performance equivalent to that of lighting fixture 99, but does not need to be connected to a hanging material and fixed during the lighting installation work. In other words, the lighting fixture 10 is large enough to be treated as a base lighting equivalent and can illuminate a wide area, but is lightweight enough that it does not require a hanging material.

Here, such lighting fixtures are referred to as lightweight large lighting fixtures. In building 1, lighting fixture 99 installed on the ceiling 4 of a room is changed to lighting fixture 10, resulting in the creation of building 1 equipped with lightweight large lighting fixtures.

In this specification, a large-sized lighting fixture is defined as a lighting fixture that satisfies at least one of the following: the total luminous flux is 2500 lm or more, the area of the light-emitting surface closest to the floor is 45000 mm2 or more, and 100 or more light sources such as LEDs are arranged. A lightweight lighting fixture is defined as a lighting fixture that can be installed on the ceiling without needing to be directly fixed to a hanging material.

A lightweight large lighting fixture is a lighting fixture that is both a large lighting fixture and a lightweight lighting fixture. In addition to the above, the conditions for determining whether a lighting fixture is lightweight or large may further include a weight of 0.5 kg or more, or a weight of less than 2.5 kg.

An example of the lighting fixture 10 is shown in Figures 5 to 7. Figure 5 is a schematic perspective view of the lighting fixture. Figure 6 is a schematic view for explaining the structure of the lighting fixture. Figure 7 is a schematic perspective view of a light source mounted in the lighting fixture.

The lighting fixture 10 has a base plate 111, a cover 112, a buffer section 113, an attachment section 12, a substrate 114, and a light source 115. The base plate 111 functions as a reinforcing plate or a heat sink in the lighting fixture 10. For example, it is a metal plate formed into a rectangular shape. For example, the metal plate can be formed using aluminum as the material.

In this specification, the term "light source" refers to a component that emits light, and the light source may be a light-emitting element such as an LED, or may be a combination of a light-emitting element and a wavelength conversion material. The term "wavelength conversion material" refers to a component that converts part or all of the light emitted by the light-emitting element into light of another wavelength, such as a phosphor material.

The cover 112 is provided so as to cover the light source 115 arranged on the substrate 114. It is also translucent to the light emitted by the light source 115. The cover 112 is formed in a milky white color with light diffusibility, for example, by dispersing titanium oxide or the like in a resin material. For example, an acrylic resin, for example, a polymethyl methacrylate resin, can be used as the resin material.

The buffer section 113 is provided on the outer periphery of the ceiling mounting surface of the base plate 111. The buffer section 113 prevents the ceiling mounting surface of the base plate 111 from coming into direct contact with the ceiling 4 (or the ceiling material 40) and buffers shocks. The mounting section 12 is the mounting portion for mounting the base plate 111 on the ceiling material 40.

The substrate 114 is an insulating substrate made of, for example, resin or ceramic, and has a light source arrangement surface on which a plurality of light sources 115 are arranged. In addition, a conductive pattern for supplying power to the light sources 115 is provided on the light source arrangement surface of the substrate 114. The material of the conductive pattern can be appropriately selected according to the main material of the substrate 114. For example, in the case of a substrate made of a ceramic material, it is preferable that the conductive pattern has a high melting point that can withstand the firing temperature of the ceramic sheet. For example, the material of the conductive wiring may be one containing a high melting point metal such as tungsten and/or molybdenum. Furthermore, other metal materials such as nickel, gold and/or silver may be provided as coating materials on the substrate by plating, sputtering, vapor deposition, etc. In addition, in the case of a substrate made of a resin material, it is preferable that the conductive pattern is easy to process. For example, in the case of a substrate made of injection-molded resin, it is preferable that the conductive pattern is easy to process by punching, etching, bending, etc., and has relatively large mechanical strength. Specific examples of materials for the conductive pattern include metals such as copper, aluminum, gold, silver, tungsten, rhodium, iron, nickel, and molybdenum, as well as iron-nickel alloys, phosphor bronze, and iron-containing copper.

6 shows a diagram in which a portion covered by cover 112 has been removed in order to explain the internal structure of cover 112. In reality, cover 112 covers substrate 114 and light source 115. The surface of substrate 114 opposite the surface on which the light source is placed contacts base plate 111.

The light sources 115 are evenly arranged on the substrate 114. For example, the light sources 115 are arranged in a matrix with a pitch of 15 mm to 20 mm. Each light source 115 includes a light emitting element 116, a wavelength conversion member 117, and a sealing member 118. The light emitting element 116 is mounted on the light source placement surface of the substrate 114, and the electrodes of the light emitting element 116 are electrically connected to a conductive pattern formed on the substrate 114. For example, the light emitting element 116 is covered with the wavelength conversion member 117 as shown in FIG. 7.

The sealing member 118 can be made of a material that is electrically insulating, transparent to light emitted from a light source (e.g., transmittance of 70% or more), and has fluidity before solidification (e.g., before curing is completed). For example, it may contain a resin raw material, such as silicone resin, epoxy resin, phenolic resin, polycarbonate resin, acrylic resin, TPX resin, polynorbornene resin, or modified or hybrid resins thereof. Among them, silicone resin is preferable because it has excellent heat resistance and/or light resistance ("silicone resin" in this specification refers to "silicone-based resin" which comprehensively includes modified resins or resins having at least a silicone skeleton). Such sealing raw materials may additionally contain fillers and/or phosphors, etc., as necessary.

The sealing member 118 covers the light emitting element 116 and the wavelength conversion member 117. The sealing member 118 has a shape with a recess near the center of the upper surface of the light emitting element 116. The sealing member 118 also has a shape with multiple protrusions on the periphery surrounding the recessed portion. In this way, the sealing member 118 has a flat shape overall, and further has a recessed portion and multiple protrusions, so that the light source 115 has a batwing-shaped light distribution characteristic.

Furthermore, the sealing member 118 has at least a maximum thickness dimension that is smaller than the maximum width dimension. For example, the maximum width is more than twice the maximum thickness. The maximum thickness is the height from the substrate 114 to the top of the protrusion of the sealing member 118. Such a flat sealing member allows the batwing to emit light from a lower height, making it possible to reduce the thickness of the lighting fixture 10. Reducing the thickness of the lighting fixture 10 makes it possible to reduce the weight even if it has a large light-emitting surface. The thickness of the lighting fixture 10 can be reduced to 30 mm or less.

The lighting fixture 10 may be, for example, a lighting fixture with a square light-emitting surface, 450 mm long and 450 mm wide, and a height of 20 mm from the ceiling installation surface to the light-emitting surface. The lighting fixture 10 may also be a lighting fixture with a square light-emitting surface, 600 mm long and 600 mm wide. Also, instead of a square light-emitting surface as shown in Figure 6, a rectangular light-emitting surface, for example, 150 mm long and 600 mm wide, may be used.

According to the building standards of Japan, designing the length and width to 600 mm or dividing this by a natural number will result in a good match with the ceiling material 40. This is because, in the building standards of Japan, building materials such as ceiling materials are measured in shaku units, and the length and width of ceiling materials are designed in units of approximately 300 mm.

By making the height and width of the lighting fixture 10 dimensions that are easy to match with the height and width of the ceiling material 40, for example, the lighting fixtures 10 can be easily installed when arranged side by side on the ceiling 4. Note that the height and width of the lighting fixture 10 need only be designed to a length that corresponds to the standards of the construction site (country) of the building 1 in which the lighting fixture 10 is installed, and therefore the standard is not necessarily in 300 mm units.

Lighting fixtures 10 that do not require fixing with a hanging material will have their weight applied to the ceiling material 40. For this reason, it is desirable to install one lighting fixture 10 on one ceiling material 40. Also, when considering the balance of the load, it is best to make the center of gravity of the lighting fixture 10 the center of the ceiling material 40. By making the vertical or horizontal dimensions of the lighting fixture 10 correspond to the vertical and horizontal dimensions of the ceiling material in accordance with building material standards, it becomes easier to create a design that satisfies these installation conditions.

Figure 8 is a flow diagram for explaining the process up to the installation of a lighting fixture. Figures 9 to 18 are supplementary diagrams for explaining each process, and are schematic diagrams relating to the state of the room. Of the tasks up to the installation of a lighting fixture, those that are not described as being performed by specialized workers capable of electrical work can be performed by workers who are not specialized in electrical work.

First, the lighting fixture 99 installed on the ceiling 4 is removed (step S11). The lighting fixture 99 is connected to the hanging material 23 and is installed on the ceiling 4 while connected to the electrical wiring 50. Therefore, in this process, the lighting fixture 99 installed on the ceiling material 40 is removed from the ceiling material 40, and then the lighting fixture 99 is removed from the hanging material 23 and the electrical connection of the lighting fixture 99 with the electrical wiring 50 is disconnected.

In the process of removing the lighting fixture 99 installed in the ceiling material 40 from the ceiling material 40, the lighting fixture 99 is removed from the ceiling material 40 so that at least the lighting fixture 99 can be removed from the hanging material 23 and the electrical connection with the electrical wiring 50 can be disconnected. Therefore, the entire lighting fixture 99 may be removed, or only a portion required for the work may be removed.

In the process of removing the lighting fixture 99 from the hanging material 23, for example, the lighting fixture 99 connected to the hanging material 23 in the attic space is removed from the hanging material. This releases the lighting fixture 99 from its state of being fixed to the frame 6 via the hanging material 23. In other words, this process can be said to be a process of disconnecting the hanging material 23 and the lighting fixture 99 that were connected in the attic space.

In the task of disconnecting the electrical connection between the lighting fixture 99 and the electrical wiring 50, for example, a tool can be used to cut the electrical wiring 50 connected to the lighting fixture 99, thereby disconnecting the electrical connection with the electrical wiring 50. In this case, since the exposed parts at the cut surface pose a risk of electric shock, etc., this should be done by a professional worker who is capable of performing electrical work. Note that disconnection may also be performed by a method other than cutting.

As this also relates to the next step, it is preferable to minimize loss of wiring length due to disconnection of the electrical wiring 50 so that a sufficient wiring length can be maintained. When cutting the electrical wiring 50, it is preferable to cut it at a position close to the end of the electrical wiring 50 on the lighting fixture 99 side. For example, the cut should be made several centimeters from the base of the electrical wiring 50 that connects to the lighting fixture 99.

If the electrical wiring 50 is connected to a power adapter installed in the ceiling space separately from the lighting fixture 99, the electrical wiring 50 that connects to the power adapter should be cut several centimeters from its base. In this case, the power adapter for the lighting fixture 99 is also collected together with the removed lighting fixture 99.

As long as a sufficient length is ensured, the cutting position of the electrical wiring 50 can be appropriately determined by the worker, but it is not necessary to make it unnecessarily short, and it is preferable to cut the electrical wiring 50 at a position within 20 cm from the end of the electrical wiring 50 on the lighting fixture 99 side. This allows the electrical wiring 50 that is electrically connected to the lighting fixture 99 to be disconnected from the lighting fixture 99, and the lighting fixture 99 is no longer electrically connected to the external power source.

It is possible to determine whether to perform the work of removing the lighting fixture 99 from the hanging material 23 first or the work of disconnecting the electrical connection with the electrical wiring 50 first. This work can be performed by a worker present in the living space.

Next, electrical wiring with a connector 51 is provided as electrical wiring that electrically connects to the lighting fixture 10 (step S12). For example, a worker in the living space can provide electrical wiring with a connector 51 by attaching a connector 52 to the electrical wiring 50 that has been disconnected from the lighting fixture 99. However, this work is performed by a professional worker who can perform electrical work, as there is a risk of electric shock when attaching the connector 52. The connector 52 is also provided at the end of the electrical wiring 50 that has been disconnected from the lighting fixture 99.

The connector 52 is an example of an electric shock prevention connection part that is used to prevent electric shock when connecting electrical connection devices such as lighting fixtures to electrical wiring. By using this electric shock prevention connection part, electrical connection devices can be electrically connected while ensuring safety against electric shock.

The connection work of the connector-equipped electrical wiring 51 using the connector 52 is ensured to be safe against electric shock, so it can be done by anyone other than a professional electrical worker. As long as the laws and regulations of Japan at the time of filing are observed, it can be done by anyone other than a qualified electrician.

It should be noted that the method is not limited to attaching a connector 52 to the electrical wiring 50 separated from the lighting fixture 99, but it is also possible to provide new electrical wiring with a connector 51. For example, if the number of lighting fixtures increases compared to before the installation change, new electrical wiring for the increased number of fixtures can be provided as explained in the interior work in step S5, and a connector can be attached to this to provide electrical wiring with a connector 51.

In addition, instead of disconnecting the electrical wiring 50 that was connected to the lighting fixture 99 and continuing to use it, it is also possible to install new electrical wiring 51 with a connector and use it. In other words, the method of installing the electrical wiring 51 with a connector can be determined appropriately as to whether to install it using the electrical wiring 50 that is already installed, or to install it anew. It is sufficient that a sufficient number of electrical wiring 51 with connectors is installed to supply power to the lighting fixture 10 installed on the ceiling 4.

Figures 9 to 11 show the process in which the electrical wiring 50 connected to the lighting fixture 99 is disconnected and the electrical wiring 50 is used to install the electrical wiring 51 with a connector. Figure 12 also shows the state in which the ceiling material 40 on which the lighting fixture 99 was installed has been removed. In Figure 12, the electrical wiring 51 with a connector corresponding to the additional lighting fixture 10 has not yet been installed.

As shown in Figure 11, the electrical wiring with connector 51 can be installed while the ceiling material 40 connected to the lighting fixture 99 remains installed, but the electrical wiring with connector 51 can also be installed after removing the ceiling material 40. Since removing the ceiling material 40 is a task that can be done by anyone other than a specialized electrical worker, if the electrical wiring 50 connected to the lighting fixture 99 is to be used, it is more efficient for a specialized worker to disconnect the electrical wiring 50 and attach the connector in one continuous process.

On the other hand, when installing new electrical wiring in the attic space, it is easier to do the work after removing the ceiling material 40. If the ceiling material 40 is left in place, that is, if the ceiling 4 in Figure 1 is left in place, workers will have to enter the attic space and perform work within this space, but considering the narrowness and darkness of the space, it will be difficult to work there.

For this reason, the work of using the existing electrical wiring 50 and the work of installing new electrical wiring may be carried out on separate dates. A specialized electrical worker will install electrical wiring with a connector 51 using the existing electrical wiring 50, then another worker will remove the necessary ceiling material 40, and then the specialized electrical worker will install the new electrical wiring with a connector 51.

Next, a new ceiling material 40 is installed to re-form the ceiling 4 (step S13). The ceiling material 40 on which the lighting fixture 99 was installed has an opening formed to fit the lighting fixture 99, which does not fit the lighting fixture 10, so the ceiling material 40 cannot be used as is to install the lighting fixture 10. Therefore, a worker in the living space removes the ceiling material 40 on which the removed lighting fixture 99 was installed. As shown in FIG. 12, even if the ceiling material 40 is removed, the joist 30 remains as it is and is connected to the hanging material 21. After removing this ceiling material 40, a new ceiling material 40 is installed as shown in FIG. 13. The newly installed ceiling material 40 has an opening formed in a shape that fits the installation of the lighting fixture 10.

It is also possible to use the installed ceiling material 40 without preparing a new ceiling material 40. For example, the opening in the ceiling material 40 can be repaired to a shape that can be used to install the lighting fixture 10. Also, if the lighting fixtures before and after the change can be installed in an opening of the same shape, there is no need to repair the opening.

As shown in Figure 13, the opening provided for installing the lighting fixture 10 is sufficiently small or very small compared to the size of the ceiling surface of the ceiling material 40 or the size of the light-emitting surface of the lighting fixture 10. In this specification, an opening that is 1/3 or less of the area of the comparison target is considered to be sufficiently small, and an opening that is 1/5 or less is considered to be very small.

The opening can be formed in a circular shape with a diameter of 10 cm to 15 cm. The shape of the opening does not have to be strictly circular. It can be a shape other than a circle, and the opening can be formed in a shape that is contained within a square with one side measuring 15 cm.

It is possible to install the lighting fixture 10 even if the maximum diameter of the opening exceeds 15 cm or is less than 10 cm. However, as described below, taking into consideration the size of the fastener that will be hooked onto the ceiling material 40 and the ease of operation for workers to put their arms through, it is preferable to ensure a circular opening of approximately 10 cm.

Even if the ceiling material 40 does not have a lighting fixture 99 installed, if the lighting fixture 10 is to be installed in the ceiling material 40 by changing the installation, an opening is formed in a shape that matches the installation of the lighting fixture 10. The opening may be formed in the ceiling material 40 that is already installed, or the already installed ceiling material 40 may be removed and the opening may be formed in the ceiling material 40 that is newly installed.

Ceiling materials 40 in areas where lighting fixtures 10 are not installed may also be removed and new ceiling materials 40 installed. All ceiling materials 40 in the room may also be replaced with new ones. If a ceiling 4 is formed by mixing ceiling materials 40 that have been used for many years with new ceiling materials 40, there may be differences in color even for the same type of ceiling materials 40. To achieve a unified color scheme, it is recommended that all ceiling materials 40 in the room be replaced with new ones. Whether to replace some or all of the ceiling materials 40 can be decided as appropriate.

In this way, the unnecessary ceiling material 40 is removed and a new ceiling material 40 is installed, and the ceiling 4 is re-formed. This work can also be performed by workers present in the living space.

As shown in Figure 13, when the ceiling material 40 is installed and the ceiling 4 is re-formed by the work of step S13, the required number of connector-equipped electrical wiring 51 are already arranged in the attic space. Also, as shown in Figure 13, each connector-equipped electrical wiring 51 is placed near the opening in the ceiling material 40 where the lighting fixture 10 to which the connector-equipped electrical wiring 51 is connected is to be installed. It is desirable to place them in a position where a worker in the living space can reach the opening with his/her arm through it and grab it.

Next, the lighting fixture 10 is installed on the ceiling 4 (step S14). A worker in the living space installs the lighting fixture 10 that has been brought into the living space on the ceiling 4. Installing the lighting fixture 10 on the ceiling 4 involves electrically connecting the lighting fixture 10 to an external power source using the connector 52 of the connector-equipped electrical wiring 51, and installing the electrically connected lighting fixture 10 on the ceiling material 40.

A worker in the living space passes his arm through the opening in the ceiling material 40, grabs the electrical wiring with connector 51 installed in the attic space, and pulls the connector 52 of the electrical wiring with connector 51 into the living space. Then, the worker can connect the connector in the living space. As mentioned above, this connection work can be performed by anyone other than a professional electrical worker.

As shown in Figure 14, the connector can be connected by inserting the connector 52 of the connector-equipped electrical wiring 51 into the terminal block 61 of the power adapter 60. Also, the lighting fixture 10 can be electrically connected by inserting the electrical cable 62 of the power adapter 60 into the terminal block 13 of the lighting fixture 10. The electrical cable 62 is provided with a connector 63, so that even those who are not specialized in electrical work can perform the connection work.

The work of connecting the connector-equipped electrical wiring 51 to the power adapter 60 and the work of connecting the power adapter 60 to the lighting fixture 10 can be done in any order. If it is difficult to connect the connector-equipped electrical wiring 51 to the power adapter 60 while the power adapter 60 and the lighting fixture 10 are connected, it is preferable to connect the connector-equipped electrical wiring 51 to the power adapter 60 first.

In addition, the power adapter 60 does not have to be separate from the lighting fixture 10, and the connector 52 of the connector-equipped electrical wiring 51 may be inserted into the lighting fixture 10 with the power adapter. In other words, the connector 52 of the connector-equipped electrical wiring 51 may be directly connected to the lighting fixture 10 to electrically connect the lighting fixture 10.

In addition, instead of a structure in which an electrical cable 62 extends from the power adapter 60 and is inserted into the terminal block 13 of the lighting fixture 10, a structure in which an electrical cable extends from the lighting fixture 10 and is inserted into the terminal block 61 of the power adapter 60 may be used.

As shown in Figure 15, the power adapter 60 connected to the connector-equipped electrical wiring 51 is placed in the attic (attic space) through an opening in the ceiling material 40 by a worker present in the living space. This operation also returns the connector-equipped electrical wiring 51 to its position in the attic. In other words, the power adapter 60 is placed in the attic through the opening through which the connected connector-equipped electrical wiring 51 passed.

Instead of placing the power adapter 60 in the attic, it may be installed in an opening in the ceiling material 40. In this case, the power adapter 60 has a fastener for installation in the ceiling material 40. The lighting fixture 10 also has a fastener for connecting to the power adapter 60.

In this way, the connector 52 of the connector-equipped electrical wiring 51 is used to electrically connect the lighting fixture 10 to an external power source. This allows the electrical wiring 51 with connector arranged in the attic space to be electrically connected to the lighting fixture 10 through the opening in the ceiling material 40.

When installing the electrically connected lighting fixture 10 on the ceiling material 40, a worker present in the living space attaches the mounting portion 12 of the lighting fixture 10 to an opening in the ceiling material 40 and installs the lighting fixture 10 on the ceiling 4.

The lighting fixture 10 has a mounting section 12 on the surface that is installed on the ceiling 4, and a lighting section 11 that illuminates the living space. The mounting section 12 also has the above-mentioned terminal block 13 for electrical connection, and a fastener 14 for physical attachment.

A worker in the living space passes the fastener 14 of the lighting fixture 10, which is electrically connected to the connector-equipped electrical wiring 51, through the opening in the ceiling material 40, and installs the lighting fixture 10 in the ceiling material 40. The lighting fixture 10 is not connected to the hanging material 23, and the entire weight of the lighting fixture 10 is applied to the ceiling material 40 on which the lighting fixture 10 is installed.

When installing the lighting fixture 10 on the ceiling material 40, a mounting bracket 70 as shown in Fig. 16 can also be used. When using the mounting bracket 70, the mounting bracket 70 is installed in the opening of the ceiling material 40 before the lighting fixture 10 and the connector-equipped electrical wiring 51 are electrically connected.

Although the lighting fixture 10 can be installed directly on the ceiling material 40, using the mounting bracket 70 may make the work easier. For example, if the fastener has elasticity and needs to be compressed when passing through an opening in the ceiling material 40, it would be difficult to work while holding a large lighting fixture. The mounting bracket 70 is an example of an auxiliary mounting part that assists in the installation of the lighting fixture 10 on the ceiling 4.

When using the mounting bracket 70, for example, the power adapter 60 connected to the connector-equipped electrical wiring 51 is placed in the attic space, and then the fastener 71 of the mounting bracket 70 is passed through an opening in the ceiling material 40 to install it. After the mounting bracket 70 is installed in the ceiling material 40, the electrical cable 62 of the power adapter 60 is pulled into the living space and connected to the lighting fixture 10. Then, with the lighting fixture 10 electrically connected to the connector-equipped electrical wiring 51, the fastener 14 of the lighting fixture 10 is passed through the opening in the mounting bracket 70 to install it.

Figure 17 shows the connection relationship between the lighting fixture 10, the power adapter 60, and the mounting bracket 70. As shown in Figure 17, the electrical cable 62 of the power adapter 60 is connected to the terminal block 13 of the lighting fixture 10, and the fastener 14 of the lighting fixture 10 is fitted into the mounting bracket 70.

If the power adapter 60 can pass through the opening in the mounting bracket 70, it is also possible to install the mounting bracket 70 on the ceiling material 40 and then connect the connector-equipped electrical wiring 51 to the power adapter 60. However, if installing the mounting bracket 70 reduces the opening connecting the living space and the attic space, making it difficult to grasp the connector-equipped electrical wiring 51 and pull it into the living space, it is preferable to avoid this procedure.

In this way, a worker present in the living space can install the lighting fixture 10, which is not connected to the hanging material 23 and is electrically connected to the connector-equipped electrical wiring 51, in the opening in the ceiling material 40 using the fastener 14 provided on the lighting fixture 10.

In this manner, the lighting in the rooms of the building 1 can be replaced from the lighting fixture 99 to the lighting fixture 10. Furthermore, by carrying out the replacement work in this manner, the work can be simplified. Furthermore, workers can be used more effectively.

One advantage is that there is no need to prepare a hanging material 23 for a newly installed lighting fixture 10. In other words, when a hanging material is required for a newly installed lighting fixture, if the hanging material that was installed before the installation cannot be used as is, it would be necessary to suspend a new hanging material from the frame, but this is not necessary in the installation process described in the first embodiment.

Another advantage is that the work that follows after the ceiling 4 has been remodeled, that is, the installation of the lighting fixtures 10, does not require a specialized electrical worker. If a specialized electrical worker disconnects the electrical wiring 50 connected to the first half of the lighting fixtures 99 and installs the electrical wiring 51 with a connector, the subsequent work can be carried out by other workers, thereby shortening the time required for specialized qualified personnel to perform the work.

Another advantage is that, because there is no need to connect the lighting fixture 10 with the hanging material 23, the work can be done as long as there is an opening in the ceiling material 40 that is large enough to pull out the electrical wiring with connector 51 arranged in the attic space into the living space. Since an opening large enough to fit an arm through is all that is needed to install the lighting fixture 10 in the ceiling 4, the work of forming an opening in the ceiling material 40 is also simplified. Note that each of these advantages can be enjoyed without necessarily having to have all of the processes described in the first embodiment.

In the living space after the installation change shown in Figure 4, when viewed from the living space side, only the lighting fixtures have been changed, but at the same time, the attic space has a unique structure due to the installation of lightweight, large lighting fixtures that do not need to be directly connected by hanging materials.

Specifically, in the attic space, the hanging material 23 remains in a state where it is not connected to the lighting fixture 10. Alternatively, the hanging material 23 has been removed, but the insert embedded in the structure 6 remains. By installing the lighting fixture 10 in the place where the lighting fixture 99 was installed, the following structure is formed in the building 1.

A building 1 has a ceiling 4 formed by arranging multiple ceiling materials 40, a lighting fixture 10 installed through an opening in the ceiling material 40, and an insert or hanging material 23 that is arranged in an area surrounded by the outer frame of the ceiling material 40 in which the lighting fixture 10 is installed in a top view in the attic space, and the lighting fixture 10 is not connected to the hanging material 23. Note that this insert may or may not be connected to the hanging material 23.

The state in which the insert and the hanging member 23 are not connected can be achieved, for example, by removing the lighting fixture 99 from the hanging member 23, disconnecting the electrical wiring 50, and then removing the hanging member 23 from which the lighting fixture 99 has been removed from the insert. The hanging member 23 may be removed from the insert before or after the electrical wiring 51 with connector is installed, but is preferably removed before the ceiling is reconstructed.

By removing the hanging material 23 that is no longer needed, it is possible to remove unnecessary objects from the ceiling space. On the other hand, by leaving the hanging material 23 in place, it is possible to avoid increasing the number of man-hours required by workers and to complete the work quickly.

Second Embodiment
Next, a process for installing lighting fixtures in a building according to the second embodiment will be described. The installation process according to the second embodiment has a different procedure from that of the first embodiment in cases where lighting fixtures are installed in places where they were not installed before the installation change, or where the number of lighting fixtures to be installed is increased from before the installation change.

In the first embodiment, in these cases, the electrical wiring 50 already connected to the lighting fixture 99 is insufficient, so new electrical wiring 51 with a connector is provided. In the second embodiment, this is done without performing wiring work that would increase the number of electrical wires drawn from the piping, thereby reducing the workload of specialized electrical workers.

Figure 18 is a schematic diagram for explaining a method for dealing with this without performing wiring work. As is clear from the figure, in the second embodiment, a power adapter 260 having two or more electrical cables 62 is used.

When a new lighting fixture 10 is installed in a location where no electrical connection device such as a lighting fixture 10 was installed before the installation change and no electrical wiring 50 was required, a power adapter 260 is placed nearby for the lighting fixture 10 to be installed.

For example, as shown in FIG. 18, if a ceiling material 40 on which no electrical connection device is installed is adjacent to a ceiling material 40 on which an electrical connection device is installed before the installation change, it is possible to electrically connect the newly installed lighting fixture 10 using the electrical wiring 50 used to electrically connect the installed electrical connection device and the power adapter 260.

If the electrical wiring 50 installed before the installation change is sufficient, a professional electrical worker can prepare the electrical wiring required for the installation change simply by converting this electrical wiring 50 into electrical wiring 51 with a connector.

In the work of installing the lighting fixtures in step S14, a worker present in the living space prepares the required number of power adapters 60 and power adapters 260 based on the number of electrical wiring with connectors 51 placed in the attic space and the number of lighting fixtures 10 to be installed on the ceiling.

Here, in order to distinguish between power adapter 60 and power adapter 260, power adapter 60 will be referred to as the first power adapter and power adapter 260 will be referred to as the second power adapter, and no distinction will be made between them when simply referring to them as power adapters.

Depending on the situation, the power adapters provided may all be first power adapters or all may be second power adapters. Here, it is assumed that both the first power adapter and the second power adapter are provided.

Once the required number of power adapters are prepared, a worker in the living space connects the connector-equipped electrical wiring 51 to the power adapters, similar to the work performed in the first embodiment. Typically, the number of power adapters prepared for the lighting fixture 10 is equal to or less than the number of connector-equipped electrical wiring 51 arranged in the attic space.

The worker places the power adapters connected to the connector-equipped electrical wiring 51 in the ceiling. It is preferable that each power adapter is placed in an opening near the power adapter with the connector 63 of the electrical cable 62 of that power adapter.

In addition, when placing a second power adapter, it is preferable that one of the multiple electrical cables 62 has its connector 63 placed in an opening near the second power adapter, while the connectors 63 of the remaining electrical cables 62 are placed near openings in another ceiling material 40.

18 shows a power adapter 260 having two electrical cables 62, but three or more electrical cables 62 may be provided on one power adapter 260. However, to avoid concentrating the electrical control load at one location, it is preferable to have four or fewer electrical cables 62.

Next, a worker in the living space connects the terminal block 13 of the lighting fixture 10 to the electrical cable 62 of the power adapter. When a second power adapter is used, different lighting fixtures 10 are connected to each of the multiple electrical cables 262 of the second power adapter. The lighting fixtures 10 electrically connected to the connector-equipped electrical wiring 51 are installed in the ceiling material 40, as in the first embodiment.

It should be noted that, even when using the second power adapter, it is possible to electrically connect to one lighting fixture 10 using a single electrical cable 262, without using multiple electrical cables 262. In other words, it is not necessary to use all of the multiple electrical cables 262.

In the building 1 according to the second embodiment, among the multiple power adapters arranged for electrically connecting the multiple lighting fixtures 10, a power adapter that connects to at least multiple lighting fixtures 10 is used. In addition, the power adapter that connects to one lighting fixture 10 may be a first power adapter or a second power adapter.

In this way, by using a power adapter 260 having multiple electrical cables 62, the work of installing new electrical wiring 51 with connectors can be eliminated, thereby reducing the workload of specialized electrical workers.

Third Embodiment
Next, the process of installing lighting fixtures in a building according to the third embodiment will be described. Fig. 19 is a schematic diagram showing a room in the building 1 after the lighting installation has been changed. The lighting fixture in the room of the building 1 shown in Fig. 19 is different from that shown in Fig. 4. Specifically, the lighting fixture has been changed from the lighting fixture 10 to the lighting fixture 310.

Apart from the difference in the shape of the lighting fixture, the process of changing the installation from the state shown in Fig. 1 to the state shown in Fig. 19 is the same as that described in the first embodiment, so a description will be omitted. Here, the installation process when changing the installation from the state shown in Fig. 4 to the state shown in Fig. 19 will be described as an example. Fig. 20 is a flow diagram for explaining the process until the installation of the lighting fixture is changed.

In the case of ceiling recessed lighting fixtures, the shape of the opening in the ceiling material 40 needs to match the shape of the light-emitting surface of the lighting fixture, so replacing a lighting fixture with one that has a different light-emitting surface shape requires a new ceiling material 40. Therefore, not only the lighting fixture but also the installed ceiling material 40 had to be removed and replaced with a new one.

On the other hand, the lighting fixture 10 does not need to match the opening of the ceiling material 40 to the shape of the light-emitting surface, and can be installed with an opening that is sufficiently smaller than the light-emitting surface. In the example described in the first embodiment, the opening is between 10 cm and 15 cm, and the light-emitting surface is 450 mm long and 450 mm wide. It was also explained that in addition to such shapes, a rectangular lighting fixture with a length of 150 mm and a width of 600 mm can also be used as the lighting fixture to be installed.

The lighting fixture 310 of the third embodiment can be, for example, a lighting fixture having a rectangular light-emitting surface of 150 mm in length and 600 mm in width as described above. The lighting fixture 310 has the same mounting portion 12 as the lighting fixture 10. Similarly to the lighting fixture 10, the lighting fixture 310 is also a lightweight large lighting fixture, and does not need to be connected to a hanging material when installed on the ceiling 4.

Because the opening formed for the lighting fixture 10 is sized to be larger than either the vertical or horizontal width of the lighting fixture 310, the mounting portion 12 can be provided so as not to exceed either the vertical or horizontal width of the lighting fixture 310. By providing the mounting portion 12 in such a position, the mounting portion 12 of the lighting fixture 310 installed on the ceiling 4 does not extend beyond the light-emitting surface when looking up at the ceiling 4 from the floor 2 side of the room.

Previously, large lighting fixtures had to be connected to a hanging material 23 when they were installed on the ceiling 4, and the connection position of the hanging material 23 was different between large lighting fixtures with light-emitting surfaces that differ greatly in shape, such as the light-emitting surfaces of lighting fixture 10 and lighting fixture 310. This made it difficult to use the same ceiling material 40 even if the fixtures had the same mounting part 12.

On the other hand, by realizing the lighting fixtures 10 and 310, which are lightweight large lighting fixtures, and by adopting a common mounting portion 12 designed to be larger than the vertical and horizontal widths of either lighting fixture, it is possible to install one of the lighting fixtures on the ceiling material 40 by simply utilizing the opening formed in the ceiling material 40 for the installation of the other lighting fixture.

In the example described in this third embodiment, the lighting fixture 10 and the lighting fixture 310 are manufactured by the same manufacturer. By standardizing the mounting portion used in lightweight large lighting fixtures, lighting fixture 10 and lighting fixture 310 can be replaced using the same opening even if they are manufactured by different manufacturers.

In addition, the mounting parts used between different lighting fixtures do not have to be strictly the same shape. As long as they can be installed on the ceiling 4 using the same opening, for example, the mounting parts may have the same shape in the plan view but a different shape in the height direction. Slight differences in the plan view shape would also be acceptable.

Furthermore, when using auxiliary mounting parts such as the mounting bracket 70 described in the first embodiment, the degree of freedom in the shape of the mounting part will be further increased. This is because if the auxiliary mounting parts are designed to fit the openings in the ceiling material, the openings in the auxiliary mounting parts can be designed to have shapes that correspond to each of the different lighting fixtures. Replacing the mounting bracket is easier than removing the ceiling material.

Thus, having the same mounting portion 12 means having a mounting portion that can be attached using the same opening, and as long as this is achieved, mounting portions having different shapes are also included.

Replacement between lighting fixture 10 and lighting fixture 310, which are lightweight, large lighting fixtures having the same mounting portion 12, is a very simple and easy procedure, as shown in the flow diagram of Figure 20.

First, remove the lighting fixture 10 installed on the ceiling 4 (step S31). The worker in the living space removes only the lighting fixture 10, leaving the ceiling material 40 in place. In addition, the lighting fixture 10 and the connector-equipped electrical wiring 51 are electrically disconnected. Specifically, the connector of the electrical cable 62 that was inserted into the terminal block 13 is unplugged.

In addition, the power adapter 60 and the connector-equipped electrical wiring 51 are electrically disconnected. Specifically, the connector of the connector-equipped electrical wiring 51 that was inserted into the terminal block 61 is unplugged. In addition, the power adapter 60 that is placed in the attic space is collected.

In order to make it easier to remove the connector of the connector-equipped electrical wiring 51 that was inserted into the terminal block 61, it is advisable to first remove the mounting bracket 70 installed on the ceiling material 40. Also, if the power adapter 60 can be used with the lighting fixture 310 as is, it is sufficient to perform the work of electrically disconnecting the lighting fixture 10 and the connector-equipped electrical wiring 51.

Next, the lighting fixture 310 is installed on the ceiling 4 (step S32). This step is the same as step S14 in the first embodiment. If the power adapter 60 can be used as is, the work begins from the point shown in FIG. 21. Therefore, a worker in the living space need only electrically connect the lighting fixture 310 to the connector-equipped electrical wiring 51, and then install the lighting fixture 310 in the electrically connected state on the ceiling material 40.

In this way, a lightweight, large-sized lighting fixture is realized, and by being able to use the same mounting part and the same power adapter, the replacement work is simplified and becomes very simple. Even if the power adapter is different, if it can be connected to the connector of the connector-equipped electrical wiring 51, the replacement work is simplified.

Although it is possible to install it in the ceiling 4 using the same opening, there may be cases where the electrical connection work is different. For example, when replacing a lighting fixture with one that connects to electrical wiring that does not have a connector. In such cases, a professional electrical worker will electrically connect the lighting fixture to the electrical wiring. Even in such cases, the replacement work is simplified as there is no need to install new hanging material.

<Fourth embodiment>
Next, the installation process of the lighting fixtures in the building according to the fourth embodiment will be described. Fig. 22 is a schematic diagram showing a room in the building 1 after the lighting installation has been changed. The room in the building 1 shown in Fig. 22 has the same lighting fixtures installed on the ceiling as the one shown in Fig. 19, but the layout is different. Specifically, with regard to the connection direction of the lighting fixtures, if the connection direction in Fig. 19 is horizontal, then the connection direction in Fig. 22 is vertical.

In the fourth embodiment, an installation process for changing the installation from the state of Fig. 19 to the state of Fig. 22 will be described as an example. When changing the installation from Fig. 19 to Fig. 22, there are the following three change patterns when viewed in units of ceiling material 40 installed on the ceiling 4.

The first pattern is where lighting fixtures were installed in that ceiling material position before the change, but are no longer installed after the change. The second pattern is where lighting fixtures were not installed in that ceiling material position before the change, but are installed after the change. And the third pattern is where the same lighting fixtures as before the change are installed in that ceiling material position after the change, but the direction in which they are installed changes.

In addition, there may be patterns in which there are no changes to the installation. Patterns in which there are no changes to the installation may include a pattern in which no lighting fixtures are installed before or after the installation change, or a pattern in which lighting fixtures remain installed in the same position and orientation before and after the installation change.

Figure 23 is a flow diagram for explaining the process of the first change pattern. Also, Figure 24 is a flow diagram for explaining the process of the second change pattern. Also, Figure 25 is a flow diagram for explaining the process of the third change pattern.

As shown in the flow diagram of Figure 23, in the first change pattern, first, the lighting fixture 310 is removed (step S411). The worker in the living space removes only the lighting fixture 310, leaving the ceiling material 40 in place. In addition, the lighting fixture 10 and the connector-equipped electrical wiring 51 are electrically disconnected. Specifically, the connector 63 of the electrical cable 62 that was inserted into the terminal block 13 is pulled out.

As described in step S31 of the third embodiment, the mounting bracket 70 installed on the ceiling material 40 is removed, and the power adapter 60 placed in the attic space is collected. Note that it is not necessary to collect the power adapter 60 and the mounting bracket 70. For example, the power adapter 60 may be left in the attic space by simply moving the power adapter 60 from its original position, and the power adapter 60 may be used for a lighting fixture 310 installed in a different position.

Next, a new ceiling material 40 is installed on the ceiling 4 (step S412). The installed ceiling material 40 has an opening for the installation of the lighting fixture 310, so this opening is blocked. Therefore, a worker in the living space removes the installed ceiling material 40 and installs another ceiling material 40 in its place with the opening blocked. Note that instead of replacing the ceiling material, a supplementary member that blocks the opening may be attached to the ceiling material 40.

As shown in the flow diagram of Figure 24, in the second change pattern, first, the ceiling material 40 is removed (step S421). Next, electrical wiring with a connector 51 is prepared for electrical connection to the lighting fixture 310. One way to prepare the electrical wiring with a connector 51 is to have a specialized electrical worker carry out the wiring work and install new electrical wiring with a connector 51. Another method is to use electrical wiring with a connector 51 that is already installed.

As the already installed electrical wiring with connector 51, it is possible to use the electrical wiring with connector 51 that remains when the lighting fixture 310 is removed, as in the first modification pattern. Alternatively, it is possible to use the electrical wiring with connector 51 connected to the power adapter 60, as described in the second embodiment. In this case, the power adapter 60 is replaced with the power adapter 260.

When a lighting fixture 310 is to be installed near an already installed electrical wiring with connector 51, it is preferable to use the electrical wiring with connector 51. Also, when the turning on and off of the lights is controlled by a switch in a specific area, it is preferable to use the electrical wiring with connector 51 in the same area.

For example, when control is performed in the dotted area A in Figure 19, it is preferable to use electrical wiring 51 with a connector that electrically connects to the lighting fixture 310 installed in this area for electrically connecting the lighting fixture 310 installed in the dotted area in Figure 23.

Once the electrical wiring 51 with connector is prepared (step S422), the ceiling material 40 is installed (step S423), and then the lighting fixture 310 is installed (step S424). The installation of the ceiling material 40 and the lighting fixture 310 can be performed by the same operations as those described in steps S13 and S14. The lighting fixture 310 can also be installed by the method described in the second embodiment.

As shown in the flow diagram of Figure 25, in the third change pattern, first, the lighting fixture 310 that is installed and fixed to the ceiling material is released from its fixed state (step S431). For example, a worker in the living space removes only the lighting fixture 310 while leaving the ceiling material 40 in place. In addition, the lighting fixture 310 and the connector-equipped electrical wiring 51 are maintained in an electrically connected state.

Next, rotate the lighting fixture 310 (step S432). The worker in the living space rotates the lighting fixture 310 by the desired angle in a plane parallel to the ceiling surface to match the orientation of the lighting fixture 310 when it is to be installed on the ceiling 4. In the example of the fourth embodiment, as shown in FIG. 26, the lighting fixture 310 is rotated by 90 degrees in a plane parallel to the ceiling surface.

This rotation operation can be performed while the electric cable 62 remains inserted into the terminal block 13 of the lighting fixture 310. Alternatively, the electric cable 62 may be temporarily removed from the terminal block 13, the lighting fixture 310 may be rotated, and the electric cable 62 may be inserted into the terminal block 13 again.

Next, the lighting fixture 310 is installed (step S433). The worker in the living space can use the lighting fixture 310 that was released from the fixed state in step S431 and rotated in step S432 as is and install it on the ceiling material 40. Since the electrical connections have already been made, the only task that needs to be performed is to install the lighting fixture 310 on the ceiling material 40.

In this way, once a room in which lighting fixtures 10 and 310 are installed in building 1 is completed, the lighting layout in the room can be easily changed. Because there is no need to connect to hanging material 23, there is no need to create an opening in ceiling material 40 to match the connection position of the hanging material, which is determined taking into account the shape and balance of the lighting fixture, and the installation of the lighting fixture can be changed using a unified opening.

As a result, changing the lighting layout no longer requires the same amount of major work as in the past. The reduced man-hours reduce labor and material costs, and when there is a change in the tenants using the rooms in building 1, for example, it becomes easier to propose changes to the lighting layout to the tenants.

When changing between lighting fixtures 10 and 310, such as changing the installation from lighting fixture 10 to lighting fixture 310 or changing the location of lighting fixture 10 or lighting fixture 310, there may be no hanging material 23 in the ceiling space of the room in building 1 at the stage before the change. In other words, this is the case when lighting fixture 10 or lighting fixture 310 is installed in the room when building 1 is constructed, and the installation is changed. In this case, since lighting fixture 10 or lighting fixture 310 is installed during the construction stage, there is no need to provide hanging material 23 during construction.

As shown in the examples of Figures 19 and 22, by arranging the layout so that multiple lighting fixtures 310 are installed in a connected manner, it is possible to design an integrated lighting system. In order to explain the various changes in the connection state, each change will be considered in terms of an area of the ceiling material 40 arranged in a 2x2 matrix. Areas B, C, and D are indicated in Figures 19 and 22. For example, looking at area B indicated by the dashed line, the layout change from Figure 19 to Figure 22 can be expressed as follows:

This layout change is a method of changing the installation from a state in which each of the multiple lighting fixtures 310 having a rectangular light-emitting surface is installed on the ceiling material 40 so that the long side of the light-emitting surface is parallel to one side of the rectangular outline that forms the ceiling surface of the ceiling material 40 (hereinafter referred to as the first direction), and the multiple lighting fixtures 310 are connected to each other, to a state in which the lighting fixtures 310 are installed on the ceiling material 40 so that the long side of the lighting fixtures 310 is parallel to one side of the rectangular outline that intersects with the one side of the ceiling material 40 (hereinafter referred to as the second direction), and the multiple lighting fixtures 310 are connected to each other. This process is also configured as the third change pattern.

Specifically, one of the two adjacent lighting fixtures 310 connected in the first direction and the lighting fixture 310 installed closest to this lighting fixture 310 in the second direction are released from their fixed state, rotated 90 degrees on a plane parallel to the ceiling surface, and installed and connected to the ceiling material 40 that was installed immediately before the fixed state was released. The same operation is also performed on the other of the two lighting fixtures 310 and the lighting fixture 310 installed closest to this lighting fixture 310 in the second direction.

For example, looking at dotted area C, the layout change from FIG. 19 to FIG. 22 is a method of changing the connection state, similar to area B. Furthermore, this process is composed of a first change pattern and a third change pattern.

Specifically, one of two adjacent lighting fixtures 310 connected in the first direction and the lighting fixture 310 installed closest to this lighting fixture 310 in the second direction are released from their fixed state, rotated 90 degrees on a plane parallel to the ceiling surface, and installed and connected to the ceiling material 40 that was installed immediately before the fixed state was released. In addition, the other of the two lighting fixtures 310 and the lighting fixture 310 installed closest to this lighting fixture 310 in the second direction are each removed from the ceiling material 40, and a ceiling material 40 without an opening is installed in the ceiling position where they were installed.

For example, looking at the dashed area D, the layout change from Figure 19 to Figure 22 is a method of changing the connection state, similar to area B. Furthermore, this process is composed of a first change pattern, a second change pattern, and a third change pattern.

Specifically, one of two adjacent lighting fixtures 310 connected in the first direction is removed from the ceiling material 40, and a ceiling material 40 without an opening is installed in the ceiling position where the lighting fixture 310 was installed. The other lighting fixture 310 of the two lighting fixtures 310 is released from the fixed state, rotated 90 degrees on a plane parallel to the ceiling surface, and installed on the ceiling material 40 where it was installed immediately before the fixed state was released. The ceiling material 40 at the position where the lighting fixture 310 connected to the other lighting fixture 310 in the second direction is to be installed is removed, electrical wiring 51 with a connector is prepared, a ceiling material 40 with an opening is installed, and the lighting fixture 310 electrically connected to the electrical wiring 51 with a connector is installed on the ceiling material 40 with its long side parallel to the second direction.

In this way, lighting fixture installation changes may include all three change patterns, or may include some of the three change patterns, or may not include some of the three change patterns.

Although the method according to the present invention has been described above based on each embodiment, the technical concept of the present invention is not limited to the specific embodiments described. In the embodiments, an example in which the lighting fixture according to the present invention is installed in a living room has been described, but the installation location is not limited to a living room and may be, for example, a front entrance or a hall. The living space is not limited to a living room and may refer to a space that exists on the opposite side of the ceiling from the attic.

Furthermore, the present invention can be applied even if it is not essential to have all the components disclosed in each embodiment in sufficient quantity. If it is within the scope of design freedom, a person skilled in the art or in the technical field to which the invention pertains can apply the present invention even if some of the components disclosed in the embodiments are not described in the claims, and the present specification discloses the invention on the premise that this is included.

The methods described in each embodiment can be used in the field of architecture, such as the construction and renovation of buildings such as office buildings, high-rise buildings, etc.

Reference Signs List 1 Building 2 Floor 3 Wall 4 Ceiling 5 Window 6 Structure 10, 310 Lighting fixture 11 Lighting section 111 Base plate 112 Cover 113 Buffer section 114 Substrate 115 Light source
116 Light emitting element
117 Wavelength conversion member
118 Sealing member 12 Mounting portion 13 Terminal block 14 Fastener 99 Illumination fixture (conventional)
20 Hanging material 21 Hanging material (for joists)
22 Hanging material (for air conditioning equipment)
23 Hanging material (for lighting fixtures)
30 Rough frame 40 Ceiling material 50 Electrical wiring (without connector)
51 Electrical wiring (with connector)
52 Connector 60, 260 Power adapter 61 Terminal block 62, 262 Electric cable 63 Connector 70 Mounting bracket 71 Fastener 90 Air conditioning equipment

Claims (11)

A method for changing the installation of lighting fixtures installed in a building, comprising:
removing the lighting fixture from a ceiling material that forms a ceiling;
a step of removing the lighting fixture connected to a hanging material in the ceiling space from the hanging material to leave the hanging material and the lighting fixture disconnected;
a step of disconnecting an electrical wiring disposed in the ceiling space and electrically connected to the lighting fixture from the lighting fixture;
providing electrical wiring with a connector as the electrical wiring for electrically connecting to a lightweight large-sized illumination fixture;
a step of removing the ceiling material forming the ceiling in which the removed lighting fixture was installed and installing another ceiling material to re-form the ceiling;
a step of electrically connecting the electrical wiring with a connector disposed in the ceiling space to the lightweight large-sized lighting fixture through an opening provided in the separate ceiling material;
a step of installing the light-weight large-sized lighting fixture, which is not connected to a hanging material and is electrically connected to the connector-equipped electrical wiring, in an opening in the ceiling material using a fastener of the light-weight large-sized lighting fixture;
The method according to claim 1, The method according to claim 1, in which the lighting fixture to be removed from the ceiling is a large lighting fixture, and the installation is changed from the large lighting fixture to the lightweight large lighting fixture. A method according to claim 1 or 2, in which, in the step of providing the electrical wiring with a connector, a connector is attached to the electrical wiring that has been disconnected from the lighting fixture in the step of disconnecting it from the lighting fixture, thereby providing the electrical wiring with a connector. A method according to any one of claims 1 to 3, in which in the process of electrically connecting the electrical wiring with a connector to the lightweight, large-sized lighting fixture, a connector of the electrical wiring with a connector arranged in the ceiling space is connected to a power adapter of the lightweight, large-sized lighting fixture. A power adapter for the light-weight large-sized lighting fixture is provided separately from the light-weight large-sized lighting fixture,
5. The method according to claim 4, wherein the step of electrically connecting the electrical wiring with a connector and the lightweight, large-sized lighting fixture comprises connecting the power adapter and the lightweight, large-sized lighting fixture. A method according to any one of claims 4 and 5, in which, in the process of electrically connecting the electrical wiring with a connector to the lightweight, large-sized lighting fixture, the connector of the electrical wiring with a connector is connected to the power adapter which connects to a plurality of the lightweight, large-sized lighting fixtures, and the plurality of the lightweight, large-sized lighting fixtures are connected to the power adapter. A method according to any one of claims 1 to 6, comprising installing the lightweight large lighting fixtures in a location on the ceiling where the lighting fixtures were installed and in a location on the ceiling where the lighting fixtures were not installed. A method for constructing a building in which a lightweight large-sized lighting fixture is installed, comprising the steps of:
A step of removing a lighting fixture installed in a ceiling material forming a ceiling from the ceiling material;
A step of removing the lighting fixture connected to a hanging material in the ceiling space from the hanging material to leave the hanging material and the lighting fixture disconnected from the hanging material;
a step of disconnecting an electrical wiring disposed in the ceiling space and electrically connected to the lighting fixture from the lighting fixture;
providing electrical wiring with a connector as the electrical wiring for electrically connecting to the lightweight large-sized illumination fixture;
a step of removing the ceiling material forming the ceiling in which the removed lighting fixture was installed, and installing another ceiling material to re-form the ceiling;
a step of electrically connecting the electrical wiring with a connector disposed in the ceiling space to the lightweight large-sized lighting fixture through an opening provided in the separate ceiling material;
a step of installing the light-weight large-sized lighting fixture, which is not connected to a hanging material and is electrically connected to the connector-equipped electrical wiring, in an opening in the ceiling material using a fastener of the light-weight large-sized lighting fixture;
The method according to claim 1, A method for renovating a building by changing the lighting installation from a lighting fixture to a lightweight large lighting fixture, comprising:
removing the lighting fixture from a ceiling material that forms a ceiling;
a step of removing the lighting fixture connected to a hanging material in the ceiling space from the hanging material to leave the hanging material and the lighting fixture disconnected;
a step of disconnecting an electrical wiring disposed in the ceiling space and electrically connected to the lighting fixture from the lighting fixture;
providing electrical wiring with a connector as the electrical wiring for electrically connecting to the lightweight large-sized illumination fixture;
a step of removing the ceiling material forming the ceiling in which the removed lighting fixture was installed and installing another ceiling material to re-form the ceiling;
a step of electrically connecting the electrical wiring with a connector disposed in the ceiling space to the lightweight large-sized lighting fixture through an opening provided in the separate ceiling material;
a step of installing the light-weight large-sized lighting fixture, which is not connected to a hanging material and is electrically connected to the connector-equipped electrical wiring, in an opening in the ceiling material using a fastener of the light-weight large-sized lighting fixture;
The method according to claim 1, A method for constructing a renovated building having a ceiling formed by arranging a plurality of ceiling materials, a lightweight large-sized lighting fixture installed through an opening in the ceiling material, and a hanging material that is arranged in an area surrounded by an outer frame of the ceiling material in which the lightweight large-sized lighting fixture is installed in a top view in an attic space and is not connected to the lightweight large-sized lighting fixture,
A step of removing a lighting fixture installed in the ceiling material forming a ceiling from the ceiling material;
a step of removing the lighting fixture connected to the hanging material in the ceiling space from the hanging material to leave the hanging material and the lighting fixture disconnected;
a step of disconnecting an electrical wiring disposed in the ceiling space and electrically connected to the lighting fixture from the lighting fixture;
providing electrical wiring with a connector as the electrical wiring for electrically connecting to the lightweight large-sized illumination fixture;
a step of removing the ceiling material forming the ceiling in which the removed lighting fixture was installed and installing another ceiling material to re-form the ceiling;
a step of electrically connecting the electrical wiring with a connector disposed in the ceiling space to the lightweight large-sized lighting fixture through an opening provided in the separate ceiling material;
a step of installing the light-weight large-sized lighting fixture, which is not connected to a hanging material and is electrically connected to the connector-equipped electrical wiring, in an opening in the ceiling material using a fastener of the light-weight large-sized lighting fixture;
The method according to claim 1, A method for constructing a renovated building having a ceiling formed by arranging a plurality of ceiling materials, a lightweight large-sized lighting fixture installed through an opening in the ceiling material, and an insert that is embedded in a structural member and arranged in an area surrounded by an outer frame of the ceiling material in which the lightweight large-sized lighting fixture is installed in a top view in an attic space, and is not connected to a hanging material,
A step of removing a lighting fixture installed in the ceiling material forming a ceiling from the ceiling material;
a step of removing the lighting fixture connected to the hanging material in the ceiling space from the hanging material to leave the hanging material and the lighting fixture disconnected;
a step of disconnecting an electrical wiring disposed in the ceiling space and electrically connected to the lighting fixture from the lighting fixture;
removing the hanging material connected to the insert from which the lighting fixture has been removed;
providing electrical wiring with a connector as the electrical wiring for electrically connecting to the lightweight large-sized illumination fixture;
a step of removing the ceiling material forming the ceiling in which the removed lighting fixture was installed, and installing another ceiling material to re-form the ceiling;
a step of electrically connecting the electrical wiring with a connector disposed in the ceiling space to the lightweight large-sized lighting fixture through an opening provided in the separate ceiling material;
a step of installing the light-weight large-sized lighting fixture, which is not connected to a hanging material and is electrically connected to the connector-equipped electrical wiring, in an opening in the ceiling material using a fastener of the light-weight large-sized lighting fixture;
The method according to claim 1,

Images