Lighting fixtures for narrow spaces

Abstract

This invention provides a lighting fixture for confined spaces that does not take up much space and can be transported not only in a straight line but also in curved directions (up, down, left, and right). [Solution] A support base 5 is provided to which one or more lighting fixtures 4 are fixed. An inverted L-shaped leg piece 6 hangs down from the lower surface of the support base 5, and the leg piece 6 is supported so as to be able to rotate horizontally with its upper plate 6a in contact with the lower surface of the support base 5. Two rollers 8 and 9, having circumferential grooves 8a and 9a, are rotatably pivoted on one side of the vertical plate 6b of the leg piece 6, spaced apart vertically. The circumferential grooves 8a and 9a of the two rollers 8 and 9 of the leg piece 6 of the support base 5 are hooked onto the upper and lower ends of the monorail 3, which is supported by a fixed structure of the building, so that the support base 5 is supported above or below the monorail 3, and the support base 5 is able to move along the monorail 3.

Description

Technical Field

[0001] This invention relates to a lighting device installed in a place where equipment and devices are jumbled up or in a narrow room, and when inspecting and maintaining these lighting fixtures, it is related to a lighting device for narrow spaces that can be easily transferred to hand for work.

Background Art

[0002] When constructing lighting in the narrow space, currently, inspection ports, inspection doors, etc. are installed, and the lighting fixtures are inspected and repaired through these inspection ports and inspection doors.

[0003] In the case of stage equipment in a theater, etc., equipment and devices are close and jumbled up, and there may be cases where inspection ports, inspection doors, etc. cannot be installed from the perspective of design, etc., and inspection and repair of these lighting fixtures are often difficult. Also, there is a risk that lighting fixture changes and additions cannot be accommodated.

[0004] When inspecting and repairing lighting fixtures in such a situation, workers enter the narrow space in a forced posture such as bending in a narrow place, and perform operations such as inspection, changing bulbs, and adding fixtures, so the workability is poor.

[0005] Therefore, lighting devices, etc. have been developed that can move the lighting fixture itself during inspection, repair, etc. of these lighting fixtures so that work can be performed at a place with good scaffolding.

[0006] The device of Patent Document 1 can lower a lighting fixture that is automatically extended by a flexible linear material to the ceiling side by driving a motor of a lifting device, and also, by driving a motor of the lifting device, the flexible linear material can be automatically wound up, and the lighting fixture can be lifted to the ceiling side and held in a use state. Since the lighting fixture held in the use state by being lifted to the ceiling side can be lowered as needed, work such as newly installing bulbs such as incandescent bulbs and fluorescent lamps, replacing bulbs, and cleaning the lighting fixture can be performed in a stable posture on the floor, etc.

[0007] Furthermore, Patent Document 2 describes a movable lighting device for tunnels, in which a plurality of rails are arranged at predetermined intervals in the direction transverse of the road, close to the ceiling surface inside the tunnel, lighting fixtures are movably suspended from these rails, and the lighting fixtures can be moved near the ends of the road. The rails are arranged symmetrically on the left and right at predetermined intervals, and rollers at both ends of the support arms of the lighting fixtures are placed on these rails to support the lighting fixtures so that they can move freely. One end of an adjustable arm that can be bent into a V shape is supported on the support arm, and the other end of the adjustable arm is supported on the outer end side of the rails. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Patent No. 2531566 [Patent Document 2] Japanese Patent Application Publication No. 62-226504 [Disclosure of the Invention] [Problems that the invention aims to solve]

[0009] However, while Patent Documents 1 and 2 describe movable lighting devices, Patent Document 1 suspends the lighting fixture with a flexible linear material, limiting its movement to a vertical direction.

[0010] Furthermore, while the lighting fixture described in Patent Document 2 can be moved horizontally, its movement is limited to a linear direction and therefore lacks versatility.

[0011] Therefore, in order to solve the above-mentioned problems, this invention aims to provide a lighting device for confined spaces that uses a monorail, can move along the monorail, and can transport lighting fixtures that do not take up much space and can move not only in a straight line but also in curves up and down and left and right by connecting a large number of lighting fixtures to the monorail. [Means for solving the problem]

[0012] The invention of claim 1 provides a lighting device for confined spaces, comprising a support base to which one or more lighting fixtures are fixed, an inverted L-shaped leg piece hanging down from the lower surface of the support base, the leg piece being supported so as to be able to rotate horizontally with its upper plate in contact with the lower surface of the support base, and two rollers having circumferential grooves being rotatably supported on one side of the vertical plate of the leg piece, spaced apart vertically, and the circumferential grooves of the two rollers of the leg piece of the support base being hooked onto the upper and lower ends of a monorail supported by a fixed structure of a building, thereby supporting the support base above the monorail and allowing the support base to move along the monorail.

[0013] The invention of claim 2 provides a lighting device for confined spaces, comprising a support base to which one or more lighting fixtures are fixed, an L-shaped leg piece erected from the upper surface of the support base, the leg piece supported so as to be able to rotate horizontally with its lower plate in contact with the upper surface of the support base, and two rollers having circumferential grooves rotatably pivoted on one side of the vertical plate of the leg piece at a vertical distance apart, the circumferential grooves of the two rollers of the leg piece of the support base are placed on the upper and lower ends of a monorail supported by a fixed structure of a building, the support base is supported below the monorail, and the support base is able to move along the monorail.

[0014] Furthermore, the invention of claim 3 is a lighting device for narrow spaces according to claim 1 or 2, wherein a plurality of support bases, each of which one or more lighting fixtures are fixed, are connected, and each adjacent support base is connected horizontally so as to be rotatable and swingable by pins that pass through these connecting pieces with some play.

[0015] Furthermore, the invention of claim 4 is a narrow-space lighting device as described in claim 3, wherein each of the plurality of lighting fixtures is provided with a power cable having a female terminal at one end of the lighting fixture body and a male terminal at the other end, and the male terminal of the power cable of the lighting fixture is fitted into the female terminal of the adjacent lighting fixture to connect them, and the connected power cables are connected in a straight line. [Effects of the Invention]

[0016] According to the inventions of Claims 1 and 2, a monorail is provided up to a narrow location where an operator cannot enter, and along the monorail, a support base on which a lighting fixture is placed is conveyed, and the lighting fixture is installed at that location. When inspecting and repairing the lighting fixture, the support base having the lighting fixture placed on the monorail is pulled back to a wide location where work can be done, and the lighting fixture can be maintained and inspected at that location. Therefore, even for a lighting device in a narrow location, maintenance and inspection can be carried out in a place with a good working environment, improving work efficiency.

[0017] Moreover, since the support base having the lighting fixture sandwiches the upper and lower edges of the monorail with the circumferential grooves of the two rollers provided on the leg pieces, the support base can be stably supported on the monorail. Moreover, the support base can also be supported below the monorail.

[0018] Also, according to the invention of Claim 3, since the connection of the support bases on which each lighting fixture is placed is rotatable horizontally and swingable, the lighting fixture can be conveyed to the target location even if the monorail is bent not only in a straight line but also in the left-right direction and the up-down direction, and it has high versatility.

[0019] Also, according to the invention of Claim 4, since the power cables of adjacent lighting fixtures are connected linearly, the power cables do not interfere during the conveyance of the lighting fixtures, and smooth conveyance can be achieved.

Brief Description of the Drawings

[0020] [Figure 1] It is a front view of the lighting device for narrow places of Embodiment Example 1 of this invention. [Figure 2] It is a partial cross-sectional side view of the lighting device for narrow places of Embodiment Example 1 of this invention. [Figure 3] It is a front view of the support base of the lighting device for narrow places of Embodiment Example 1 of this invention. [Figure 4] It is a side view of the support base of the lighting device for narrow places of Embodiment Example 1 of this invention. [Figure 5] It is a plan view of the support base of the lighting device for narrow places of Embodiment Example 1 of this invention. [Figure 6] Front view of the connection part of a plurality of support bases of the narrow-space lighting device according to Embodiment Example 1 of the present invention. [Figure 7] Plan view of the connection part of a plurality of support bases of the narrow-space lighting device according to Embodiment Example 1 of the present invention. [Figure 8] Front view of the lighting fixture of the narrow-space lighting device according to Embodiment Example 1 of the present invention. [Figure 9] Side view of the lighting fixture of the narrow-space lighting device according to Embodiment Example 1 of the present invention. [Figure 10] Front view of the narrow-space lighting device according to Embodiment Example 1 of the present invention in the state of use. [Figure 11] Plan view of the narrow-space lighting device according to Embodiment Example 1 of the present invention in the state of use.

Mode for Carrying Out the Invention

[0021] (Embodiment Example 1) The narrow-space lighting device A according to Embodiment Example 1 of the present invention will be described based on FIGS. 1 to 9.

[0022] As shown in FIGS. 1 and 2, the narrow-space lighting device A is provided with supports 2 spaced apart on the floor 1 of a structure or the like, and a monorail 3 on a vertical plate in cross section supported by the supports 2. A support base 5 with a lighting fixture 4 placed on its upper surface is movably placed on this monorail 3.

[0023] Inverse L-shaped leg pieces 6 hang down from the lower surfaces of both ends of the support base 5, and the upper plates 6a of the respective leg pieces 6 are abutted against the lower surface of the support base 5, and a shaft 7 hanging down from the lower surface of the support base 5 penetrates the upper plate 6a and is supported rotatably in the horizontal direction. Also, two rollers 8 and 9 having circumferential grooves 8a and 9a respectively are rotatably supported at intervals in the vertical direction on one side surface of the vertical plate 6b of the leg piece 6. And the circumferential grooves 8a and 9a of these upper and lower rollers 8 and 9 are provided facing each other.

[0024] Furthermore, the support base 5 is supported by the monorail 3 by fitting the circumferential grooves 8a and 9a of the upper and lower rollers 8 and 9 on the lower surfaces of the leg pieces 6 at both ends to the upper and lower edges of the monorail 3, respectively, and is able to move freely along the longitudinal direction of the monorail 3.

[0025] Furthermore, multiple support bases 5 are connected, with connecting pieces 10 protruding from the ends of each adjacent support base 5. These connecting pieces 10 are stacked vertically, and a pin 11 is inserted through a hole 10a at the stacked location with some play. A stopper plate 11a is fixed to the lower end of the pin, and an annular head 11b is provided at the upper end.

[0026] Therefore, as shown in Figure 7, each adjacent support base 5 is rotatable horizontally around the pin 11. Furthermore, the width between the annular head 11b of the pin 11 and the stopper plate 11a is greater than the width of the two connecting pieces 10 stacked on top of each other, and as described above, the pin 11 is loosely passed through the hole 10a of each connecting piece 10, so as shown in Figure 6, each adjacent support base 5 is tiltable, that is, it is oscillating.

[0027] As shown in Figures 8 and 9, the lighting fixture 4 has an elongated shape, with the lower part being the lighting fixture body 4a and the upper part integrally equipped with an LED light source 4b. One end of the lower lighting fixture body 4a is provided with a female terminal 4c for connecting another power cable 12, and the other end is to which a power cable 12 having a male terminal 4d at its tip is led out. This power cable 12 is rigid but has some flexibility so that it can follow the movement of the adjacent support base 5.

[0028] As shown in Figure 1, two lighting fixtures 4 are placed side by side on the support base 5, and the male terminal 4d at the end of the power cable 12 of each adjacent lighting fixture 4 is mated with the female terminal 4c of the adjacent lighting fixture 4. Similarly, the power cable 12 is connected between the lighting fixtures 4 on two adjacent support bases 5. Furthermore, the power cable 12 connecting these lighting fixtures 4 is arranged in a nearly straight line.

[0029] The confined space lighting device A has the above configuration. For example, when using the confined space lighting device A as a lighting fixture to be placed in a narrow space where workers cannot enter, such as a place where there are many decorations, equipment, and devices such as stage sets and attraction sets, multiple support members 2 are provided at intervals on the columns and beams of the structure or on the floor 1 shown in Figure 1, a monorail 3 is supported on these support members 2, the monorail 3 is extended to the predetermined confined space, the multiple connected support bases 5 are placed on the monorail 3, the lighting fixtures 4 fixed to the support bases 5 are connected to each other with power cables 12, the connected support bases 5 are pushed from behind with a rod or the like to place these support bases 5 in the predetermined location, and the lighting fixtures 4 are turned on in this state.

[0030] If one of the lighting fixtures 4 is not lit or is malfunctioning, it must be replaced. In this case, the frontmost support base 5 is pulled closer, and the multiple connected support bases 5 are brought to one end of the monorail 3. The faulty lighting fixture 4 is removed from the support base 5, replaced with a working lighting fixture 4, fixed to the support base 5, the power cables 12 between adjacent lighting fixtures 4 are connected, and the lighting fixtures 14 are transported back to their original location via the monorail 3.

[0031] The connected support bases 5 on which the lighting fixtures 4 are mounted can be transported by, for example, folding a rope (not shown) connected to the leading support base 5 back at the tip of the monorail 3 and extending it to the rear end (front) of the monorail 3, connecting the end of the extended rope to the rear end of the first support base 5 to form a loop, and pulling the rope at the rear end of the monorail 3 to transport the multiple connected support bases 5. However, the transport of the support bases 5 can also be done by other suitable means.

[0032] As described above, the lighting device A for confined spaces has adjacent support bases 5 that are connected to each other so as to be able to swing freely. For example, as shown in Figure 10, multiple support bases 5 can be transported even if there is an uphill section on the monorail 3. Furthermore, because adjacent support bases 5 are connected to each other so as to be able to rotate horizontally, multiple support bases 5 can be transported even if the monorail 3 is curved on almost the same plane, as shown in Figure 11.

[0033] In the above embodiment example 1, the light source of the lighting fixture 4 illuminates upwards, but this is not the only option. The lighting fixture 4 can also be mounted on the side of the support base 5 so that the light source illuminates the side. Furthermore, in the above embodiment example 1, the support base 5 is positioned above the monorail 3, but the support base 5 can also be positioned to hang downwards below the monorail 3. In that case, the lower plate of the L-shaped leg piece 6 is placed on the upper surface of the support base 5, and it is made rotatable horizontally by the shaft 7. The other configurations are the same as in embodiment example 1.

[0034] Furthermore, the support base 5 can be used individually or in multiple units. In addition, the monorail can be supported not only on the floor, but also on a support body with one end fixed to a fixed object such as a wall, beam, or column. [Explanation of symbols]

[0035] A Lighting device for narrow spaces 1 floor 2 supports 3 Monorail 4 Lighting fixtures 4a Lighting equipment body 4b Light source section 4c female terminal 4d male terminal 5 Support base 6 Leg piece 6a Top plate 6b Vertical plate 7-axis 8-roller 8a Circumferential groove 9 Roller 9a Circumferential groove 10 Connecting piece 10a Hole 11 Pin 11a Stopper plate 11b Ring-shaped head 12 Power Cables

Claims

1. A lighting device for confined spaces, characterized in that it is provided with a support base to which one or more lighting fixtures are fixed, an inverted L-shaped leg piece hangs down from the lower surface of the support base, the upper plate of the leg piece is in contact with the lower surface of the support base and is supported so as to be able to rotate horizontally, and two rollers having circumferential grooves are rotatably pivoted on one side of the vertical plate of the leg piece, spaced apart vertically, and the circumferential grooves of the two rollers of the leg piece of the support base are attached to the upper and lower ends of a monorail supported by a fixed structure of a building, thereby supporting the support base above the monorail, and the support base is able to move along the monorail.

2. A lighting device for confined spaces, characterized in that it is provided with a support base to which one or more lighting fixtures are fixed, an L-shaped leg piece is erected from the upper surface of the support base, the lower plate of the leg piece is in contact with the upper surface of the support base and is supported so as to be able to rotate horizontally, two rollers having circumferential grooves are rotatably pivoted on one side of the vertical plate of the leg piece at a vertical distance apart, the circumferential grooves of the two rollers of the leg piece of the support base are attached to the upper and lower ends of a monorail supported by a fixed structure of a building, the support base is supported below the monorail and the support base is able to move along the monorail.

3. The lighting device for confined spaces according to claim 1 or 2, characterized in that a plurality of support bases, each of which one or more lighting fixtures are fixed, are connected, and each adjacent support base is connected horizontally so as to be rotatable and swingable by pins that pass through these connecting pieces with some play.

4. The lighting device for confined spaces according to claim 3, characterized in that each of the plurality of lighting fixtures is provided with a power cable having a female terminal at one end of the lighting fixture body and a male terminal at the other end, and the male terminal of the power cable of the lighting fixture is fitted into the female terminal of the adjacent lighting fixture to connect them, and the connected power cables are connected in a straight line.

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