Illuminating device

Abstract

To provide an illuminating device flexibly adaptable to both a conventional office and an ABW office.SOLUTION: A device according to one embodiment of the present invention is an illuminating device to be attached to a ceiling, and having a square shape in a planar view, and comprises a fixed type first luminaire, lighting ducts, and a terminal block for supplying power to the first luminaire and the lighting ducts. One or more of the lighting ducts are arranged along at least one side of the illuminating device having the square shape. A movable type second luminaire can be attached to the lighting ducts. There is provided a setting part capable of switching between lighting and extinguishing of the first luminaire and the second luminaire when the second luminaire is attached to the lighting ducts.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a lighting device.

Background Art

[0002] Conventionally, lighting devices in offices have been required to illuminate the interior of the office uniformly at the required illuminance. On the other hand, with the spread of ABW (Activity Based Working) offices, lighting devices are also required to provide a lighting environment that matches the purpose and work content and responds to the way of working in which the place and time of work can be freely selected. For example, in addition to the normal work desks in the office, lighting corresponding to various areas such as dedicated desks for concentration and relaxation spaces is required. As lighting corresponding to ABW offices, an environmental control system such as Patent Document 1 is known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the environmental control system disclosed in Patent Document 1 above, a plurality of spotlights for illuminating the upper surfaces of desks in a room where a plurality of desks are arranged, a plurality of base lights for illuminating a wider area in the room than the upper surfaces of the desks, and a plurality of speakers for outputting sound in the room are provided. A part of the ABW office is divided into two areas: a centralized control area where people are particularly likely to concentrate on work, and another part of the ABW office where people are particularly likely to feel relaxed and a plurality of people communicate, which is a co-creation area. Also, in order to enhance the zoning effect, a buffer area is provided between the two areas. In order to attach the spotlights, a plurality of duct rails are installed in advance on the ceiling.

[0005] However, when changing the layout from a conventional office to an ABW office, for example, it is necessary to install a large-scale environmental control system dedicated to the ABW office as in Patent Document 1, and there is a problem that it is difficult to plan lighting accompanying the layout change.

[0006] An object of the present disclosure is to provide a lighting device that can flexibly respond to both a conventional office and an ABW office.

Means for Solving the Problems

[0007] The lighting device of the present disclosure is a rectangular-shaped lighting device attached to the ceiling, and includes a fixed first lighting fixture, a lighting duct, and a terminal block that supplies power to the first lighting fixture and the lighting duct. One or more lighting ducts are arranged along at least one side of the rectangular-shaped lighting device, and a detachable second lighting fixture can be attached to the lighting duct. When the second lighting fixture is attached to the lighting duct, a setting unit is provided that can switch between turning off and turning on the first lighting fixture and the second lighting fixture.

Effects of the Invention

[0008] According to the lighting device of the present disclosure, in a state where the second lighting fixture is not attached, it corresponds to a conventional office. Further, for example, by providing a base light as the first lighting fixture and a spotlight as the second lighting fixture in the lighting duct, it is possible to flexibly respond to an ABW office. Further, since the lighting duct is incorporated into the lighting fixture, it is excellent in terms of design. Since it is a lighting device in which the lighting duct is incorporated into the lighting fixture and integrally constructed, even in the case of a setting using only spotlights, there is no sense of discomfort due to the base light being turned off.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4A

Figure 4B

Figure 4C

Figure 5A

Figure 5B

Figure 6

Figure 7

Figure 8A

Figure 8B

Figure 8C

Figure 9

Mode for Carrying Out the Invention

[0010] Hereinafter, the lighting device according to the embodiment of the present invention will be described in detail with reference to the drawings. However, the embodiments shown below are examples of lighting devices for embodying the technical idea of the present invention, and do not specify the present invention thereto. The present invention can be equally applied to other embodiments included in the claims. In the embodiments of the present invention, an application example to an ABW office will be mainly described. However, the present invention is not limited to lighting fixtures dedicated to ABW offices, and can be used for various purposes such as conventional office lighting fixtures.

[0011] When the lighting device according to the embodiment of the present invention is attached to a ceiling, for example, a grid ceiling, the side surface of the lighting device cannot be seen. However, in the drawings, a perspective view including the side surface of the lighting device is used for the purpose of explaining the structure of the lighting device according to the embodiment of the present invention. In addition, since the lighting duct is incorporated in the lighting device, the lighting duct itself is not independently exposed to the outside. However, for the explanation of the lighting duct, a drawing in which only the lighting duct portion is extracted is also used. In addition, each drawing is for the purpose of clearly explaining the embodiment of the present invention, and there are also some parts that are omitted or exaggerated.

[0012] Embodiment 1. The lighting device according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 6.

[0013] FIG. 1 is a perspective view of the lighting device of Embodiment 1. The lighting device 1 includes a housing 10, and a base light 20 and a lighting duct 30 are attached to the housing 10 as a first lighting fixture. A louver 11 is detachably provided on the light-emitting side of the base light 20.

[0014] In the example of FIG. 1, a pair of writing ducts 30 are arranged between a pair of base lights 20 so as to be parallel to the extending direction of the base lights 20 and along the side of the lighting device 1. The number of writing ducts 30 is not limited to a pair, and any number may be used as long as it is one or more. Further, in the example of FIG. 1, the writing ducts 30 are arranged such that a pair of writing ducts 30 are between a pair of base lights 20, parallel to the extending direction of the base lights 20, and along the side of the lighting device 1. However, this is only an example, and the present embodiment is not limited thereto. For example, an arrangement in which the writing ducts 30 are centered on the lighting device 1, or an arrangement in which a pair of writing ducts 30 are respectively along the outside of a pair of base lights 20, etc., various arrangements can be adopted.

[0015] The writing duct 30 is attached to the housing 10 of the lighting device 1 while being sandwiched between both side surfaces. The method of attaching the writing duct 30 to the housing 10 is not particularly limited, but is fixed in a state of being sandwiched between both side surfaces by means such as screwing, shape coupling by unevenness, welding, adhesion, etc.

[0016] By being fixed to the housing 10 while the both side surfaces of the writing duct 30 are sandwiched, it is advantageous from the viewpoint of mechanical strength. For example, even when compared with a case where the writing duct 30 is attached in a manner of hanging from a T-bar as in the conventional case, fixing the writing duct 30 to the housing 10 while sandwiching both side surfaces as in the lighting device 1 of the present embodiment can improve the mechanical strength including durability such as earthquake resistance strength. Further, by arranging so as to sandwich the writing duct 30, it also contributes to the improvement of the mechanical strength of the lighting device 1 itself.

[0017] In addition, by fixing the lighting duct 30 using the T-bar of the grid ceiling together, the mechanical strength can be further improved. For example, both ends of the lighting duct 30 can be directly or indirectly engaged with the T-bar of the grid ceiling. Also, the lighting duct 30 can be arranged along the T-bar of the grid ceiling and directly or indirectly engaged with the T-bar.

[0018] When the lighting duct 30 is attached in a manner of hanging it from the T-bar as in the conventional case, for example, it is in a manner of hanging it from the ceiling by screwing or the like, so there is a structural problem of being vulnerable to vibrations such as earthquakes. In contrast, since the lighting duct 30 is fixed to the housing 10 in a state where both side surfaces are sandwiched, the lighting duct 30 has a structure in which it is difficult to vibrate, so the mechanical strength is improved also from the viewpoint of earthquake resistance strength and the like.

[0019] By incorporating the lighting duct 30 into the lighting device 1 and increasing the mechanical strength of the lighting device 1, the durability can be increased also for earthquake resistance strength and the like as described above, so the degree of freedom in the design of the lighting device is improved. For example, in the case of lengthening the lighting device 1, it is possible to increase the mechanical strength by arranging a plurality of lighting ducts 30 along the longitudinal direction of the lighting device 1.

[0020] FIG. 1 shows a case where a second lighting fixture is attached to the lighting duct 30. For example, when the lighting device of the present embodiment is used in a conventional office, it is also assumed that it is used in a state where the second lighting fixture is not attached to the lighting duct 30. Even in such a case, since the lighting duct 30 is incorporated into the lighting device 1 and is also integrated in terms of design, it is superior in design compared to the case where the lighting duct 30 is arranged on the ceiling in an exposed state as in the conventional case.

[0021] In the example of FIG. 1, the surface of the writing duct 30 is arranged to be flush with the surface of the lighting device 1. The arrangement of the writing duct 30 in the height direction is not particularly limited, but it is provided so as not to be exposed from the lower surface of the lighting device 1. Functionally, the writing duct 30 can also be arranged below the lower surface of the lighting device 1. In this case, there are limitations from the design perspective and the optical perspective associated with the writing duct 30 protruding downward, that is, from the perspective of whether the writing duct 30 obstructs the emission of the emitted light and from the perspective of whether it becomes a physical obstacle downward. However, as long as the function of the writing duct 30 is not inhibited, its three-dimensional arrangement can be freely designed.

[0022] In the example of FIG. 1, the writing duct 30 is fixed to the lighting device 1, but the present embodiment is not limited to this. The writing duct 30 can be made retractable by storing it inside the lighting device 1 or covering the lower surface side of the writing duct 30 with a movable cover. In this case, for example, when used in a conventional office, the writing duct 30 is used in a stored state, and when used in the layout of an ABW office, the writing duct 30 that was in the stored state can be taken out or deployed, and a second lighting fixture can be attached to the writing duct 30 for use.

[0023] The lighting device 1 of the present embodiment is not particularly limited, but in the example of FIG. 1, it will be described as being used by being attached to a grid ceiling. Since the lighting device 1 of the present embodiment is dimensionally designed in consideration of the opening area of the grid ceiling, when attaching it to the grid ceiling, it is possible to install the lighting device 1 within the range of a predetermined opening area set in the grid ceiling in advance. Therefore, the lighting device 1 of the present embodiment is advantageous even when the opening area of the grid ceiling cannot be changed. Note that the lighting device 1 of the present embodiment is not only used for grid ceilings but can be used for any form of lighting attached to the ceiling.

[0024] FIG. 2 is a perspective view of the lighting device 1 of FIG. 1 with a spotlight 40 attached thereto. One or more second lighting fixtures, for example, a spotlight 40, a downlight, a task light, etc., can be attached to the lighting duct 30 in a plurality of types. In the example of FIG. 2, the case where one spotlight 40 and two spotlights 40 are respectively arranged on a pair of lighting ducts 30 is shown. The type and number of the second lighting fixtures arranged on the lighting duct 30 can be arbitrarily set as long as they satisfy power limitations, current limitations, weight limitations, and physical arrangement limitations, that is, physical limitations such as the second lighting fixtures overlapping or colliding with each other.

[0025] FIG. 3 is an enlarged schematic view of one of the plurality of spotlights 40 attached to the lighting device 1 shown in FIG. 2. In the spotlight 40, a light source unit 43 is attached to a main body portion 41, and the main body portion 41 is slidably fixed to the lighting duct 30 via an arm 42 and a plug 50. Although not particularly limited, the length of the arm of the spotlight 40, the direction of the arm 42, the direction of the main body portion 41, that is, the directions such as the vertical direction and the rotation direction, which are the directions of the emitted light of the light source unit 43, the light condensing degree of the emitted light of the light source unit 43, etc. can be changed and set. In the spotlight 40, the direction and position of the main body portion 41 can be freely changed.

[0026] The lighting duct 30 is provided with a duct rail 31 for slidably fixing the plug 50, a first power supply terminal 32 and a second power supply terminal 33, which are two-pole terminals for supplying power to the plug 50.

[0027] FIG. 4A is a schematic view of the lighting duct 30 of the lighting device 1 of FIG. 1. With reference to FIG. 4A, the lighting duct 30 will be described in detail. The lighting duct 30 is a long member extending in the sliding direction of the plug 50, and has a cross-sectional shape with a part of the portion where the plug 50 is attached being open.

[0028] Figure 4A is a schematic diagram of the cross-section of the writing duct 30. The writing duct 30 is provided with a pair of duct rails 31 for slidably fixing the plug 50, a first power supply terminal 32 and a second power supply terminal for supplying power to the plug 50, and a duct-side grounding terminal 34.

[0029] Figure 4B is a schematic diagram of the plug 50 corresponding to the writing duct 30 of the lighting device in FIG. 1. Figure 4B is a schematic diagram of the cross-section of the plug 50 corresponding to the cross-section of the writing duct 30 in FIG. 4A. The plug 50 is provided with a pair of engaging portions 51 that engage with the duct rails 31, a first power receiving terminal, a second power receiving terminal, and a plug-side installation terminal 54.

[0030] Figure 4C is a schematic diagram of the case where the plug 50 is attached to the writing duct of the lighting device in FIG. 1. Figure 4C is a schematic diagram of the cross-section corresponding to FIGS. 4A and 4B. The pair of engaging portions 51 of the plug 50 are respectively fitted into and engaged with the pair of duct rails 31 of the writing duct 30. Since the shape and dimensions of the cross-section of the engaging portion 51 are designed to be slightly smaller than the shape and dimensions of the cross-section of the duct rail 31, the engaging portion 51 can move along the extending direction of the duct rail 31 with an appropriate clearance and can be engaged and fixed at its predetermined position.

[0031] The first power receiving terminal 52 of the plug 50 is in contact with the first power supply terminal 32 of the writing duct 30. The second power receiving terminal 53 of the plug 50 is in contact with the first power supply terminal 32 of the writing duct 30. Also, the plug-side installation terminal 54 of the plug 50 is in contact with the duct-side grounding terminal 34 of the writing duct 30. Thereby, the plug 50 can be supplied with power by two poles from the writing duct 30 and can be grounded. Here, the writing duct 30 with a grounding terminal has been described, but the grounding terminal can also be omitted.

[0032] In order to confirm the polarities of the first power supply terminal 32 and the second power supply terminal 33, for example, the cross-sectional shape of the lighting duct 30 is made asymmetrical left and right, and it may be matched with the polarity of the plug 50 according to the cross-sectional shape of the lighting duct 30. Specifically, the plug 50 also has an asymmetrical cross-sectional shape that matches the lighting duct 30, and by matching the shapes of both, it is also possible to match the polarities.

[0033] To attach the plug 50 to the lighting duct 30, with the direction along the longitudinal direction of the opening hole of the lighting duct 30 and the direction parallel to the pair of engaging portions 51 of the plug 50, insert the plug 50 into the opening hole of the lighting duct 30. Next, after inserting the plug 50, rotate the plug 50 by 90 degrees within the opening hole of the lighting duct 30 and attach it so that the engaging portion 51 fits into the duct rail 31. As the lighting duct 30, one compliant with Japanese Industrial Standard JIS C8366 is used.

[0034] The lighting device 1 of this embodiment, for example, as shown in FIG. 1, corresponds to a conventional office when the second lighting fixture is not attached. Even in this case, as described above, also, since the lighting duct 30 is incorporated into the lighting device 1, it is excellent in terms of design. On the other hand, for example, as shown in FIG. 2, by attaching and using the second lighting fixture, it can flexibly correspond to an ABW office. In this case, since the lighting duct 30 is integrated with the lighting device 1, it is excellent in terms of design, and also, even in the case of a setting using only the spotlight 40, there is no sense of incongruity due to the base light 20 being turned off. For example, by providing a base light as the first lighting fixture and a spotlight as the second lighting fixture in the lighting duct, it can flexibly correspond to an ABW office.

[0035] Furthermore, by incorporating the lighting duct 30 into the lighting device 1, it is possible to increase the mechanical strength of the lighting device 1, so the degree of freedom in the design of the lighting device, such as being able to increase the length, is improved. Also, the durability, such as the seismic resistance strength, can be enhanced.

[0036] Further, it is advantageous from the viewpoint of mechanical strength that both side surfaces of the writing duct 30 are fixed to the lighting device 1 in a state of being covered by the components constituting the housing of the lighting device 1, for example, in a state where both side surfaces of the writing duct 30 are sandwiched. For example, even when compared with a case of attaching the writing duct 30 in a manner of hanging it from a T-bar as in the prior art, fixing the lighting fixture with the writing duct sandwiched on both side surfaces like the lighting device 1 of the present embodiment can enhance the mechanical strength including durability such as seismic resistance. Furthermore, by arranging to sandwich the writing duct 30, it also contributes to the improvement of the mechanical strength of the lighting device 1 itself.

[0037] FIG. 5A is an explanatory diagram of the wiring of the lighting device according to Embodiment 1. The lighting device 1 is provided with a terminal block 61 for connecting a power source for supplying power to the lighting fixture. The terminal block 61 is connected to a power source circuit 60 as a power source, and for example, alternating current 200V is input as a commercial power source. The terminal block 61 is provided with a step-down circuit 62, for example, as a voltage transformation circuit. The step-down circuit 62 receives, for example, a commercial power source of alternating current 200V, and the step-down circuit 62 steps down this commercial power source of alternating current 200V to alternating current 100V corresponding to the writing duct 30.

[0038] From one terminal of the terminal block 61, a commercial power source of alternating current 200V is output and supplied to the base light 20 via the base light control circuit 64. Further, from the other terminal of the terminal block 61, a voltage stepped down to alternating current 100V from the step-down circuit 62 is output and supplied to the spotlight 40 via the spotlight control circuit 65.

[0039] A dimming switch 63 is connected to the base light control circuit 64 and the spotlight control circuit 65, and based on the operation of the dimming switch, on-off control and dimming control of the base light 20 and the spotlight are performed. For example, the spotlight control circuit is a circuit equipped with a phase control circuit, and the spotlight can be dimmed by phase control. Also, it is possible to use the base light control circuit 64 and the spotlight control circuit 65 as wireless control circuits. That is, the lighting fixtures such as the base light 20 and the spotlight 40 may receive a wireless control command and perform on-off control and dimming control. Here, in FIG. 5A, it is a block diagram showing that the base light 20 and the spotlight 40 are controlled by the base light control circuit 64 and the spotlight control circuit 65 respectively, but this is only a schematic diagram. In the actual base light 20 and spotlight 40, a control circuit is incorporated on the lighting fixture side, and part or all of the control by the base light control circuit 64 and the spotlight control circuit 65 in FIG. 5A may be performed on the lighting fixture side. Note that the dashed lines in FIG. 5A indicate control signals, and the solid lines indicate power transmission. In the lighting device 1 of the present embodiment, since it is only necessary to secure only the power supply for the base light 20 which is the first lighting fixture, the wiring work is easy.

[0040] FIG. 5B is an explanatory diagram of the wiring of a modified example of the lighting device 1 according to Embodiment 1. It is different from FIG. 5A in that one terminal block 61 is replaced with two terminal blocks 61A and 61B. For the same configuration as in FIG. 5A, the same reference numerals are used and the description thereof is omitted. In such a modified example, a base light terminal block 61A and a spotlight terminal block 61B are connected to the power supply circuit 60. An AC power supply voltage of 200 V is input from the power supply circuit to the base light terminal block 61A. An AC power supply voltage of 200 V is supplied from the base light terminal block 61A to the base light control circuit 64. On the other hand, an AC power supply voltage of 100 V is input from the power supply circuit to the spotlight terminal block 61B. An AC power supply voltage of 100 V is input from the spotlight terminal block 61B to the spotlight control circuit 65. When a plurality of types of power supply voltages are supplied from the power supply circuit 60, according to the modified example, it is not necessary to provide separate voltage conversion means, which is particularly advantageous when both a 200 V power supply and a 100 V power supply are wired. Since the terminal block does not require voltage conversion means, it is also advantageous from the viewpoint of weight reduction, which is also advantageous from the viewpoint of mechanical strength.

[0041] FIG. 6 is an explanatory diagram of the dimming switch of the lighting device according to Embodiment 1. By operating the dimming knob 63A, the dimming switch 63 can turn on and off and dim the base light 20 and the spotlight 40.

[0042] As a first example, an example of performing dimming control on both the base light 20 and the spotlight 40 will be described. When the dimming knob 63A is aligned with the scale B, the base light 20 is fully lit and the spotlight 40 is turned off. On the other hand, when the dimming knob 63A is aligned with the scale S, the base light 20 is turned off and the spotlight 40 is fully lit. Also, when the dimming knob 63A is aligned with the scale C, the base light 20 is dimly lit and the spotlight 40 is dimly lit. Also, when the dimming knob 63A is aligned with the scale S, the base light 20 is turned off and the spotlight 40 is fully lit. At this time, since the power consumption of the entire lighting fixture of the lighting device 1 is restricted as described later, a dimming setting value that does not exceed the restricted power capacity is automatically set. At this time, since the power consumption of the entire lighting fixture of the lighting device 1 is restricted as described later, a dimming setting value that does not exceed the restricted power capacity is automatically set. Therefore, by operating the dimming knob 63A, the dimming of each of the base light 20 and the spotlight 40 can be easily set. Also, since the setting unit includes an operation switch for operating the lighting and dimming of the first lighting fixture and the second lighting fixture, even when the second lighting fixture is attached, setting by a separate operating device is not necessary, and the lighting and dimming operations are easy to perform.

[0043] As a second example, an example of performing dimming control in which only one of the base light 20 and the spotlight 40 is lit and the other is turned off will be described. When the dimming knob 63A is aligned with the scale B, the base light 20 is fully lit and the spotlight 40 is turned off. On the other hand, when the dimming knob 63A is aligned with the scale S, the base light 20 is turned off and the spotlight 40 is fully lit. Also, when the dimming knob 63A is aligned with the scale C, the base light 20 is turned off and the spotlight 40 is turned off. That is, in the mode of this second example, the scale C is the off position. Also in this case, since the power consumption of the entire lighting fixture of the lighting device 1 is restricted as described later, a dimming setting value that does not exceed the restricted power capacity is automatically set. Therefore, by operating the dimming knob 63A, the dimming of each of the base light 20 and the spotlight 40 can be easily set.

[0044] Next, the operations of the dimming switch 63, the base light control circuit 64, and the spotlight control circuit 65, which serve as the setting unit, for the lighting device 1 of the present embodiment will be described in detail.

[0045] The spotlight control circuit 65 may be provided with a spotlight 40 attachment detection device. In this case, the spotlight 40 attachment detection device determines whether the spotlight 40 as the second lighting fixture is attached to the lighting duct 30 of the lighting device 1 of the present embodiment, and can perform on / off control and dimming control of the base light 20 as the first lighting fixture and the spotlight 40 as the second lighting fixture.

[0046] In the lighting device of the present embodiment, the spotlight 40 attachment detection device determines the presence or absence of the attachment of the spotlight 40. When the spotlight 40 as the second lighting fixture is attached to the lighting duct 30, the base light 20 as the first lighting fixture can be set not to light up.

[0047] Also, when the spotlight 40 as the second lighting fixture is attached to the lighting duct 30, sometimes when the spotlight 40 as the second lighting fixture is lit, the base light 20 as the first lighting fixture can be set not to light up. Thereby, even when the second lighting fixture is attached, it is surely set so as not to exceed the power capacity.

[0048] As an example of a spotlight 40 attachment detection device, a device that determines whether the spotlight 40 is attached to the lighting duct 30 based on the impedance difference can be used. Further, when the spotlight 40, which is the second lighting fixture, is attached to the lighting duct 30, in order to set the base light 20, which is the first lighting fixture, not to light up, for example, it is only necessary to send a turn-off command to the control circuit provided in the base light 20. Further, in order to avoid the risk of noise and control failure, a switch device including contacts such as a relay may be separately provided. Furthermore, a simple latch circuit or the like that shuts off one lighting fixture may be provided based on the impedance difference.

[0049] Instead of the spotlight 40 attachment detection device, power limitation can also be performed by a wattmeter. The wattmeter monitors the power consumption of the base light 20 and the spotlight 40, and when the numerical value of the wattmeter exceeds the limited power capacity, for example, the rated voltage of the base light 20, the base light 20 can be turned off. If the priority order when applying power limitation is assigned to the lighting fixtures in advance, for example, (Priority 1) The first base light 20 (Priority 2) The second base light 20 (Priority 3) The first spotlight 40 (Priority 4) The second spotlight 40 (Priority 5) The third spotlight 40 If set as such, when the total power consumption of the lighting fixtures exceeds the limited power capacity, power limitation can be performed in the order of Priority 1 first, then Priority 2, then Priority 3, then Priority 4, and finally Priority 5.

[0050] As a method of performing power limitation, it is also possible to control not only to turn off a specific lighting fixture but also to limit the power by dimming. For example, in response to any dimming operation from the dimming switch 63 in FIG. 6, the setting unit of the present embodiment sets the dimming setting so that the total power consumption of the lighting fixtures does not exceed the limited power capacity.

[0051] Here, although it is exemplified that power is limited by a wattmeter instead of the spotlight 40 attachment detection device, the present embodiment is not limited to this. For example, a current detection device for detecting the current flowing through the lighting device 1 may be provided, and the current flowing through the lighting device 1 based on the current detected by the current detection device may be limited, that is, a configuration may be adopted in which current is limited.

[0052] In the mode of the first example of FIG. 6 described above, the following settings are made. (1) When the dimming knob 63A is adjusted to the scale B, the base light 20 is fully lit and the spotlight 40 is turned off. (2) When the dimming knob 63A is adjusted to the scale C, the base light 20 is dimmed by 50% and only one spotlight 40 is lit. (3) As a modification of the above (2), when the dimming knob 63A is adjusted to the scale C, the base light 20 is dimmed by 50% and the spotlight 40 is dimmed by 50%. (4) When the dimming knob 63A is adjusted to the scale midway between S and C, the base light 20 is dimmed by 20% and only two spotlights 40 are lit. (5) As a modification of the above (4), when the dimming knob 63A is adjusted to the scale midway between S and C, the base light 20 is dimmed by 20% and the spotlight 40 is dimmed by 80%. (6) When the dimming knob 63A is adjusted to the scale S, the base light 20 is turned off and all the spotlights 40 are lit. At this time, since the power consumption of the entire lighting fixture of the lighting device 1 is limited as described later, a dimming setting value that does not exceed the limited power capacity is automatically set.

[0053] Thus, since the power consumption of the entire lighting fixture of the lighting device 1 is limited, a dimming setting value that does not exceed the limited power capacity is automatically set. The amount of dimming can be set by the number of lit base lights 20 and spotlights 40, the dimming rate, and both of them. Therefore, by operating the dimming knob 63A, the dimming of each of the base light 20 and the spotlight 40 can be easily set.

[0054] In the present embodiment, the case where the power supply voltage of the base light is 200V has been described. However, the power supply voltage of the base light may be 100V. In this case, since the writing duct 30 may be supplied with a 100V power supply, the step-down circuit 62 becomes unnecessary. Further, when the power supply voltage has a range such as 100V / 200V dual compatibility, a transformer circuit that can supply a 100V power supply to the writing duct 30 regardless of the input power supply voltage may be used.

[0055] According to the lighting device 1 of the present embodiment, the terminal block transforms the power supply voltage received from the power supply for the first lighting fixture and supplies power to the writing duct 30, so that only the power supply for the base light 20, which is the first lighting fixture, needs to be secured. Therefore, it is advantageous for wiring work.

[0056] Further, according to the lighting device 1 of the present embodiment, since the terminal block includes a first terminal block that receives power from the power supply for the first lighting fixture and a second terminal block that receives power from the power supply for the writing duct 30, it is possible to receive power supply from a plurality of power sources. Therefore, it is not necessary to provide separate voltage conversion means, which is particularly advantageous when both a 200V power supply and a 100V power supply are wired. Since the terminal block does not require voltage conversion means, it is also advantageous from the viewpoint of weight reduction, which is also advantageous from the viewpoint of mechanical strength.

[0057] Further, according to the lighting device 1 of the present embodiment, when the second lighting fixture is attached and / or when the second lighting fixture is lit, the setting unit sets the first lighting fixture to be turned off, so that even when the second lighting fixture is attached, it is surely set so as not to exceed the power capacity.

[0058] Further, according to the lighting device 1 of the present embodiment, when the second lighting fixture is attached, the setting unit performs on / off control and / or dimming control so that the total power consumption of the first lighting fixture and the second lighting fixture does not exceed the power capacity of the first lighting fixture, thereby ensuring that the power capacity is not exceeded. Even when performing dimming setting, since it is automatically set within the range of the power capacity, the dimming setting is easy and reliable power limitation is possible.

[0059] Further, according to the lighting device 1 of the present embodiment, the setting unit includes an operation switch for operating the on / off and dimming of the first lighting fixture and the second lighting fixture. Therefore, even when the second lighting fixture is attached, no separate setting by an operation device is required, and the on / off operation and the dimming operation are easy.

[0060] Embodiment 2. The lighting device according to Embodiment 2 of the present invention will be described with reference to FIG. 7. The same components as those in FIGS. 1 to 6 are denoted by the same reference numerals, and the description thereof is omitted. FIG. 7 is a perspective view of the lighting device of Embodiment 2. In FIG. 1 of Embodiment 1, the lighting duct 30 was provided parallel to the longitudinal direction of the base light 20, whereas in the lighting device 1A of the present embodiment, the lighting duct 30A is provided perpendicular to the longitudinal direction of the base light 20.

[0061] In the present embodiment, a pair of lighting ducts 30A are provided so as to be perpendicular to the longitudinal direction of the pair of base lights 20 and along the vicinity of a pair of sides orthogonal to the longitudinal direction of the pair of base lights 20. According to such an arrangement of the lighting ducts 30A, the mechanical strength is reinforced along the vicinity of the sides orthogonal to the longitudinal direction of the pair of base lights 20.

[0062] According to the lighting device 1A of the present embodiment, when combined with Embodiment 1, the lighting ducts 30 and 30A can be arranged either parallel to the extending direction of the first lighting fixture or perpendicular to the extending direction of the first lighting fixture. Therefore, the degree of freedom in the layout of the second lighting fixture is improved. In particular, since various arrangements of the lighting ducts 30 and 30A are possible, it is possible to design the strength of the lighting device according to the arrangement of the lighting ducts 30 and 30A. Further, since the arrangement of the lighting duct 30A is perpendicular to the longitudinal direction of the base light 20 and is arranged in parallel near the side perpendicular to the longitudinal direction of the base light 20 of the lighting device 1A, it also contributes to the improvement of the design quality.

[0063] The lighting ducts 30 and 30A of the present embodiment can be arranged either parallel to the extending direction of the first lighting fixture or perpendicular to the extending direction of the first lighting fixture. Therefore, the degree of freedom in the layout of the second lighting fixture is improved. Also, it is possible to design the strength of the lighting device according to the arrangement of the lighting duct. Further, since the arrangement of the lighting duct will be along the side of the lighting device, the design quality is further improved.

[0064] Embodiment 3. The lighting device according to Embodiment 3 of the present invention will be described with reference to FIG. 8. The same reference numerals are used for the same configurations as in FIGS. 1 to 7, and the description thereof will be omitted. FIG. 8A is a plan view of the lighting device 1B of Embodiment 3, FIG. 8B is a cross-sectional view of the lighting device 1B of Embodiment 3, and FIG. 8C is an explanatory view of the attachment of the first lighting fixture unit 20U of the lighting device 1B of Embodiment 3.

[0065] In the lighting device 1B of the present embodiment, the lighting duct 30B is integrated with the base light 20B as the first lighting fixture and unitized as the first lighting fixture unit 20U. That is, as shown in FIGS. 8A and 8B, the lighting duct 30B is integrated with the base light 20B as the first lighting fixture and unitized as the first lighting fixture unit 20U.

[0066] And, as shown in FIG. 8C, the first lighting fixture unit 20U is detachable and replaceable with respect to the lighting device 1B. For this reason, since the lighting duct 30B is a unit integrated with the first lighting fixture, any lighting device 1B to which the lighting duct integrated type first lighting fixture unit 20U can be attached can achieve the same effects as those of the first and second embodiments of the present invention. That is, even if it is not a lighting device dedicated to an ABW office, by attaching the first lighting fixture unit 20U, flexible lighting for the ABW office layout is possible.

[0067] Moreover, since the first lighting fixture unit 20U is a replaceable unit, for example, it is easy to replace from a fluorescent lamp fixture to an LED fixture. Also, when replacing the unit from a fluorescent lamp fixture to an LED fixture, if the lighting duct integrated type first lighting fixture unit 20U is used, flexible lighting for the ABW office layout is possible at the same time as replacing from a fluorescent lamp fixture to an LED fixture, and the same effects as those of the first and second embodiments can be achieved.

[0068] According to the lighting device 1B of the present embodiment, since the lighting duct 30B is a unit integrated with the first lighting fixture, any lighting fixture to which the lighting duct integrated type first lighting fixture unit can be attached can achieve the same effects as those of the lighting fixture of the first aspect of the present invention.

[0069] In addition, by making the first lighting fixture an exchangeable unit, it is easy to replace, for example, a fluorescent lamp fixture with an LED fixture. Further, when replacing the unit from a fluorescent lamp fixture to an LED fixture, if a lighting duct integrated type first lighting fixture unit is used, at the same time as replacing from a fluorescent lamp fixture to an LED fixture, the same effects as the lighting fixture of the first aspect of the present invention can be obtained, that is, in a state where the second lighting fixture is not attached, it can cope with a conventional office, and for example, by providing a base light as the first lighting fixture and a spotlight as the second lighting fixture in the lighting duct, it can flexibly cope with an ABW office. Further, since the lighting duct is incorporated into the lighting device 1, it is excellent in terms of design, and since it is a lighting device in which the lighting duct is incorporated into the lighting fixture and integrally constructed, even in a setting where only the spotlight is used, there is no sense of discomfort due to the base light being turned off. Furthermore, by incorporating the lighting duct into the lighting device, the mechanical strength of the lighting device can be increased, so that the degree of freedom in the design of the lighting device, such as being able to be lengthened, can be improved, and effects such as enhancing the durability in terms of earthquake resistance strength can also be achieved.

[0070] Embodiment 4. The lighting device according to Embodiment 4 of the present invention will be described with reference to FIG. 9. The same components as those in FIGS. 1 to 8 are denoted by the same reference numerals, and the description thereof is omitted. FIG. 9 is a perspective view of the lighting device 1C of Embodiment 4. In Embodiments 1 to 3, the lighting device attached to the grid ceiling was exemplified and described, but in this embodiment, an example of a lighting fixture other than the one attached to the grid ceiling, for example, a long lighting fixture attached to the ceiling, will be described.

[0071] The lighting device 1C is a long lighting device attached to the ceiling, a long light unit 70 is provided on the light-emitting side of the fixture main body 75, and a lighting duct 30B is provided on one side surface of the light unit 70 in a direction along the light unit 70. A plug 50 is detachably and slidably attached to the lighting duct 30B, and a spotlight 40 is attached via the plug 50.

[0072] Regarding the arrangement of the writing duct 30B, in FIG. 9, an example in which the writing duct 30B is provided along the light unit on one side surface of the light unit 70 has been described. However, the present embodiment is not limited to this. As long as a lighting fixture such as a spotlight as the second lighting fixture is detachably and position-adjustably attached, the arrangement and the number of the writing ducts 30B are arbitrary. For example, a pair of writing ducts 30B can be provided along the light unit 70 on both sides of the light unit 70. Further, for example, the writing duct 30B can be provided in a direction orthogonal to the light unit 70 on the end side of the light unit 70.

[0073] According to the lighting device of the present embodiment, in a state where the second lighting fixture is not attached, it has corresponded to the conventional office. Further, for example, by providing a base light as the first lighting fixture and providing a spotlight as the second lighting fixture in the writing duct, it is possible to flexibly correspond to an ABW office. Further, since the writing duct is incorporated into the lighting fixture, it is excellent also in terms of design. Since it is a lighting device in which the writing duct is incorporated into the lighting fixture and integrally constructed, even in the case of a setting using only spotlights, there is no sense of incongruity due to the base light being turned off. Further, it is applicable to any lighting device attached to the ceiling, such as a long base light.

[0074] As described above, the lighting devices 1, 1A, and 1B of the present invention have been described. However, the above embodiments exemplify the lighting devices 1, 1A, and 1B for embodying the technical idea of the present invention, and do not specify the present invention thereto. It can be equally applied to modified examples of each embodiment, combinations of each embodiment, and other embodiments.

[0075] As the first lighting fixture, not only the base light 20, but also not only LED lighting fixtures, but also organic EL lighting fixtures, discharge lamp lighting fixtures such as fluorescent lamps, and any lighting fixture can be adopted. Further, as the second lighting fixture, not only the spotlight 40, but also other types of lighting fixtures such as downlights and task lights can be used.

[0076] In Embodiment 1, the on / off control and dimming control were described, but it can also be applied to various effect illuminations including color mixing control. Further, it is also possible to add a speaker to the lighting devices 1, 1A, and 1B to include acoustic control such as music and voice.

[0077] Also in Embodiment 1, the first lighting fixture can be a replaceable unit.

[0078] Although the power limitation of the lighting device 1 has been described, the method for controlling so as not to exceed the electrical capacity of the lighting device 1, for example, the power capacity, is not limited to the power limitation by the wattmeter. For example, a current detection device for detecting the current flowing through the lighting device 1 is provided, and the current flowing through the lighting device 1 based on the current detected by the current detection device is limited, that is, various other modifications for limiting the electrical capacity of the lighting device 1 are included, such as a configuration for performing current limiting.

[0079] Hereinafter, various aspects of the present disclosure will be collectively described as appendices. (Appendix 1) A lighting device having a rectangular shape in plan view to be attached to the ceiling, comprising a fixed first lighting fixture, a lighting duct, and a terminal block for supplying power to the first lighting fixture and the lighting duct, one or more of the lighting ducts are arranged along at least one side of the rectangular lighting device, a detachable second lighting fixture can be attached to the lighting duct, A lighting device, characterized in that a setting unit is provided for switching between turning off and on the first lighting fixture and the second lighting fixture when the second lighting fixture is attached to the writing duct. (Appendix 2) The writing duct is arranged parallel to the extending direction of the first lighting fixture, and arranged perpendicular to the extending direction of the first lighting fixture The lighting device according to Appendix 1, characterized in that it is arranged in at least one of the above arrangements. (Appendix 3) The lighting device according to Appendix 1 or Appendix 2, characterized in that the writing duct is fixed to the lighting fixture with both side surfaces covered by parts constituting the housing of the lighting device. (Appendix 4) The lighting device according to any one of Appendices 1 to 3, characterized in that the terminal block transforms the power supply voltage received from the power supply for the first lighting fixture and supplies power to the writing duct. (Appendix 5) The lighting device according to any one of Appendices 1 to 4, characterized in that the terminal block consists of a first terminal block that receives power from the power supply for the first lighting fixture and a second terminal block that receives power from the power supply for the writing duct. (Appendix 6) The lighting device according to any one of Appendices 1 to 5, characterized in that the setting unit is set such that the first lighting fixture is turned off when the second lighting fixture is attached and / or when the second lighting fixture is lit. (Appendix 7) The lighting device according to any one of Appendices 1 to 6, characterized in that the setting unit performs on / off control and / or dimming control so that the total power consumption of the first lighting fixture and the second lighting fixture does not exceed the power capacity of the first lighting fixture when the second lighting fixture is attached. (Appendix 8) The lighting device according to any one of Appendices 1 to 7, characterized in that the setting unit includes an operation switch for operating the on / off and dimming of the first lighting fixture and the second lighting fixture. (Supplementary Note 9) The lighting duct is a unit integrated with the first lighting fixture, and the lighting device according to any one of Supplementary Notes 1 to 8, characterized in that it is a unit integrated with the first lighting fixture. (Supplementary Note 10) The first lighting fixture is a replaceable unit, and the lighting device according to any one of Supplementary Notes 1 to 9, characterized in that it is a replaceable unit.

Explanation of Reference Numerals

[0080] 1 Lighting device, 10 Housing, 11 Louver, 20 Base light, 30 Lighting duct, 31 Duct rail, 34 Duct side grounding terminal, 40 Spotlight, 41 Main body, 42 Arm, 43 Light source unit, 50 Plug, 51 Engaging portion, 54 Plug side installation terminal, 60 Power circuit, 61 Terminal block, 62 Step-down circuit, 63 Dimmer switch, 64 Base light control circuit, 65 Spotlight control circuit, 70 Light unit, 75 Fixture body.

Claims

1. A lighting device having a rectangular shape in plan view, which is attached to a ceiling, comprising a fixed first lighting fixture, a lighting duct, and a terminal block for supplying power to the first lighting fixture and the lighting duct, wherein one or more of the lighting ducts are arranged along at least one side of the rectangular lighting device, wherein a detachable second lighting fixture can be attached to the lighting duct, and a setting unit is provided for switching off and on the first lighting fixture and the second lighting fixture when the second lighting fixture is attached to the lighting duct.

2. The lighting duct is arranged parallel to the extending direction of the first lighting fixture, and arranged perpendicular to the extending direction of the first lighting fixture The lighting device according to claim 1, characterized in that it is arranged in at least one of the above arrangements.

3. The lighting device according to claim 1, characterized in that the lighting duct is fixed to the lighting fixture in a state where both side surfaces are covered by components constituting the housing of the lighting device.

4. The lighting device according to claim 1, characterized in that the terminal block steps down the power supply voltage received from the power supply for the first lighting fixture and supplies power to the lighting duct.

5. The lighting device according to claim 1, characterized in that the terminal block comprises a first terminal block for receiving power from the power supply for the first lighting fixture and a second terminal block for receiving power from the power supply for the lighting duct.

6. The lighting device according to claim 1, characterized in that the setting unit is set such that the first lighting fixture is turned off when the second lighting fixture is attached and / or when the second lighting fixture is lit.

7. The lighting device according to claim 1, characterized in that when the second lighting fixture is attached, the setting unit performs on / off control and / or dimming control so that the total power consumption of the first lighting fixture and the second lighting fixture does not exceed the power capacity of the first lighting fixture.

8. The lighting device according to claim 1, characterized in that the setting unit includes an operation switch for operating on / off and dimming of the first lighting fixture and the second lighting fixture.

9. The lighting device according to claim 1, characterized in that the lighting duct is a unit integrated with the first lighting fixture.

10. The lighting device according to claim 1, wherein the first lighting fixture is a replaceable unit.

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