JP7233353B2 - translucent covers, lamps and lighting devices - Google Patents

Description

TECHNICAL FIELD The present invention relates to a translucent cover, a lamp, and a lighting device. In particular, it relates to prevention of deterioration of a cover that covers a light source.

Lighting devices have a wide range of uses. Therefore, lighting devices are sometimes used even in special environments. The special environment is, for example, an environment such as a metal processing factory where cutting oil is used, a food factory where cooking oil is used, a chemical factory where various chemicals are used, or a semiconductor factory where organic solvents are used. These locations naturally require luminaires that are resistant to oils, chemicals, solvents, and the like.

2. Description of the Related Art In a lighting fixture having a light source of a lighting device, a material having translucency is used for the outer shell of a cover that covers the light source because of its function. In recent years, as light sources have changed from incandescent lamps or fluorescent lamps to LEDs, translucent materials have changed from glass to resin for the purpose of safety and weight reduction. A device has been proposed that has a light-transmitting cover that is made by laminating a material made of acrylic or arylate resin on a resin such as polycarbonate (see, for example, Patent Document 1). In this way, in the translucent cover, by coating the base resin with at least one of acrylic, fluorine, and silicone resin materials, resistance to oils, chemicals, solvents, etc., can be achieved. is increasing.

JP 2017-123259 A

However, the light-transmitting cover coated as in Patent Document 1 does not have a high gas barrier property like glass. Therefore, the gas generated by the light source or its peripheral equipment may be released to the outside, affecting the manufacturing process and products in the factory. In addition, gas generated in the factory may enter the lighting equipment and damage the light source, electronic parts, and the like. For this reason, it has been difficult to use a translucent resin cover in a special environment such as a factory.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a translucent cover for a lighting device, a lighting fixture, and a lighting device that have improved gas barrier properties and are suitable for use in special environments.

A light-transmitting cover according to the present invention is a light-transmitting cover that covers a device including a light-emitting portion that serves as a light source, and includes a light-transmitting base material and a light-transmitting base material laminated on the outer wall surface side of the base material when viewed from the light source. The first resin layer is laminated on a base material and made of a resin having a gas barrier property higher than that of the base material, and the second resin layer is composed of: It is located outside the first resin layer when viewed from the light source and is made of a resin having higher chemical resistance than the substrate and the first resin layer.

Further, a lamp according to the present invention has the translucent cover described above and a light-emitting portion serving as a light source.

Further, a lighting device according to the present invention includes the lighting device described above and a lighting device having a mounting portion to which the lighting device is mounted.

According to the present invention, the first resin layer made of a resin having high gas barrier properties is formed on the outer wall surface side of the base material when viewed from the light source, and the resin layer formed of a resin having high chemical resistance is formed outside the first resin layer. and a second resin layer. Therefore, a translucent cover having excellent gas barrier properties and chemical resistance can be obtained.

1 is a perspective view of lighting device 1 according to Embodiment 1. FIG. FIG. 2 is a perspective view showing division of the lighting fixture 2 and lamp fixture 3 of the lighting device 1 according to Embodiment 1; 2 is a diagram showing a vertical cross section of lighting device 1 orthogonal to the longitudinal direction of lighting device 1 according to Embodiment 1. FIG. 1 is a perspective view of a lighting fixture 3 according to Embodiment 1. FIG. 3 is an exploded perspective view of one end of the lamp 3 according to Embodiment 1. FIG.

Hereinafter, a translucent cover, a lamp, and a lighting device according to embodiments will be described with reference to the drawings. The same or corresponding components in each drawing are denoted by the same reference numerals, and repeated description may be omitted.

Here, the present invention is not limited by the embodiments described below. In addition, in the following drawings, the size relationship of each component may differ from the actual size. Also, in the description of the embodiments, directions or positions such as up, down, left, right, front, back, front, and back may be indicated. These notations are for the convenience of explanation, and do not limit the arrangement, direction, and orientation of devices, instruments, parts, and the like.

Embodiment 1.
<Configuration of lighting device 1>
FIG. 1 is a perspective view of a lighting device 1 according to Embodiment 1. FIG. Also, FIG. 2 is a perspective view showing the division of the lighting device 2 and the lighting device 3 of the lighting device 1 according to the first embodiment. FIG. 3 is a diagram showing a vertical cross section of lighting device 1 perpendicular to the longitudinal direction of lighting device 1 according to Embodiment 1. As shown in FIG. The configuration of a lighting device 1 according to Embodiment 1 will be described with reference to FIGS. 1 to 3. FIG.

In the following description, a direction along the longitudinal direction of the lighting device 1 is defined as a longitudinal direction X. As shown in FIG. In addition, a transverse direction Y is defined as a transverse direction perpendicular to the longitudinal direction X. As shown in FIG. A vertical direction Z is a direction perpendicular to both the longitudinal direction X and the lateral direction Y. As shown in FIG. In addition, in the longitudinal direction X, the direction toward the longitudinal ends is defined as an end direction X1. The direction to the side opposite to the end direction X1 and the direction to the longitudinal center side is defined as the inward direction X2. Furthermore, in the vertical direction Z, the direction toward the construction portion 9 side (ie, the ceiling or wall side) to which the lighting device 1 is attached is defined as an upward direction Z1. The direction opposite to the upward direction Z1, and the direction toward the irradiation space where light is emitted from the lighting device 1, is defined as the downward direction Z2. Here, the upward direction Z1 is the direction in which the lighting device 3 is attached to the lighting device 2, and the downward direction Z2 is the direction in which the lighting device 3 is removed from the lighting device 2. FIG.

A lighting device 1 according to Embodiment 1 has a lighting fixture 2 attached to a construction portion 9 such as a ceiling or a wall and a lighting fixture 3 attached to the lighting fixture 2 . The illumination device 1 also has a sealing structure for the lamp 3, which will be described later. In Embodiment 1, a so-called trough-type lighting fixture 2 is shown as an example.

<Lighting fixture 2>
The luminaire 2 serves as an attached portion to which the lamp 3 is attached. The lighting fixture 2 has a fixture body 20 . In the first embodiment, the device body 20 is formed by bending a metal plate. The instrument body 20 has an instrument bottom portion 21 , a pair of instrument side portions 22 and a pair of instrument end portions 23 . The instrument bottom part 21 is formed in a long and flat plate shape, and two instrument side parts 22 are arranged at both ends in the short direction Y of the instrument bottom part 21 . Moreover, the instrument end portions 23 that form a set of two are arranged at both ends in the longitudinal direction X of the instrument bottom portion 21 . A knockout 24 is formed in the instrument end 23, and is removed when various electric wires such as a power supply wire 81 are inserted in a wiring member 85, which will be described later. The configuration and the like of the lighting fixture 2 will be further described.

The mounting portion 25 is a housing portion that houses a portion of the mounted lamp 3 . The mounting portion 25 is formed in a concave shape by the device bottom portion 21 of the device main body 20, the set of device side portions 22, and the set of device end portions 23. As shown in FIG. Therefore, the mounting portion 25 forms a space surrounded by the device bottom portion 21 of the device main body 20 , the set of device side portions 22 and the set of device end portions 23 . Here, a part of the lamp 3 accommodated in the mounting portion 25 is a non-irradiating portion that is not on the irradiation side. Further, as shown in FIGS. 2 and 3(a), the space of the mounting portion 25 in which the lamp 3 is accommodated and which is not occupied by the lamp 3 is a wiring member 85 or the like, which will be described later. 3, the wiring area 29 is arranged through which the wiring is connected to the terminal 3.

An open end 26 located at the lower end of the instrument body 20 is a portion of the instrument body 20 that is open. The open end portion 26 serves as a mounting opening for attaching and detaching the lamp 3 to and from the mounting portion 25 of the lighting fixture 2 . Connecting portions 27 are formed at both ends in the longitudinal direction X of the opening end portion 26 of the instrument body 20 . The lamp 3 is attached to the connecting portion 27 . In Embodiment 1, the connecting portion 27 is formed integrally with the instrument end portion 23, and is formed by bending from the open end portion 26 toward the inward direction X2 in the longitudinal direction X. As shown in FIG. A screw hole 28 formed in the connecting portion 27 is a hole into which a connecting screw 48 (to be described later) attached to the lamp 3 is screwed. The lamp 3 is screwed and fixed to the lighting fixture 2 with a connecting screw 48 .

<Light fixture 3>
FIG. 4 is a perspective view of the lamp 3 according to Embodiment 1. FIG. Here, the lamp 3 will be described with reference to FIGS. 1 to 4. FIG. The lighting fixture 3 constitutes the lighting device 1 by being attached to the lighting fixture 2 . A lighting device and a lighting device 3 serving as a light source unit are formed in an elongated shape, and are used by being attached to the lighting device 2 . In Embodiment 1, the lighting fixture 3 is attached to the connecting portion 27 of the lighting fixture 2 at both ends in the longitudinal direction X of the lighting fixture 2 by connecting screws 48 described later. As shown in FIGS. 2 and 3(a), the lamp 3 of Embodiment 1 mainly includes a translucent cover 30, an end cover 40, a light emitting part 60 serving as a light source, and the like.

<translucent cover 30>
The translucent cover 30 that is the outer shell is a cover that uses a translucent material that transmits at least visible light. The light-transmitting cover 30 has a tubular shape that accommodates and protects the mounting member 50, the light emitting unit 60, the control unit 80, and the like, which will be described later, in an internal space. The translucent cover 30 can be formed using an amorphous resin material such as polycarbonate. In addition, the portion of the translucent cover 30 that is exposed to the outside from the mounting portion 25 also serves as an appearance design portion.

In the lamp 3 of Embodiment 1, as shown in FIG. It becomes an outer shell part which becomes an outer wall part covering the surface of the pedestal 51 in . Here, regarding the outer peripheral portion 37 of this portion, the direction of the normal to the outer surface portion is within the range from the direction along the optical axis of the light emitting element 61 to the direction orthogonal to the optical axis. For example, when the lighting device 3 is attached to the lighting device 2 so that light is emitted downward from the lighting device 1, the portion of the translucent cover 30 exposed to the outside from the attachment portion 25 is The outer surface faces downward, obliquely downward, or laterally (horizontally outward). That is, the outer surface portion of the portion of the translucent cover 30 exposed to the outside from the mounting portion 25 does not face upward or obliquely upward. A portion of the translucent cover 30 that is housed in the mounting portion 25 and is not exposed to the outside covers the control portion 80 and the side of the mounting surface portion 52 of the pedestal 51 on which the control portion 80 is arranged. The surface of the portion of the translucent cover 30 that is housed in the mounting portion 25 and is not exposed to the outside faces the device bottom portion 21 and the set of device side portions 22 of the device main body 20 . Here, the translucent cover 30 may have light diffusing properties, wavelength discriminating properties, etc. according to product specifications and the like. In addition, the portion of the translucent cover 30 that is not exposed to the outside may be formed using a material having reflectivity, light shielding property, or the like.

The cylindrical translucent cover 30 of Embodiment 1, as shown in FIGS. 1 to 4, covers the equipment housed therein and has a pair of parallel portions 31 depending on the position relative to the equipment housed therein. , a first connecting portion 32 and a second connecting portion 33 . Two ribs 34 are provided on the translucent cover 30 . A pair of parallel portions 31 form a pair of surfaces of the translucent cover 30 that are parallel to each other at the same distance. In the translucent cover 30, both the outer surface portion serving as the outer surface portion and the inner surface portion serving as the inner surface portion of the set of parallel portions 31 are both planar. The set of outer surface portions and the set of inner surface portions are planes along the optical axis of the light emitting element 61 accommodated in the translucent cover 30 . In Embodiment 1, this plane extends along the vertical direction Z when the lamp 3 is attached to the lighting fixture 2 . Furthermore, this plane is also a plane along which a pair of outer surface portions and a pair of inner surface portions are along fixture side sections 22 facing each other when the lamp 3 is attached to the lighting fixture 2 . This plane also serves as a plane along the direction in which the lighting device 3 is attached to the lighting device 2 or the direction in which it is removed from the lighting device 2 . Therefore, the parallel portion 31 of the translucent cover 30 is positioned inside the instrument side portion 22 rather than outside the instrument side portion 22 in the lateral direction Y. As shown in FIG. A portion of the parallel portion 31 that is exposed when the lamp 3 is attached to the lighting equipment 2 serves as an irradiation portion on the side of the lamp 3 .

The first connection portion 32 is a portion that connects the ends of the pair of parallel portions 31 on the irradiation side, intersects the optical axis of the light emitting element 61 , and serves as the main irradiation portion of the lamp 3 . The first connection portion 32 emits light downward from the light emitting element 61 . The outer surface portion and the inner surface portion of the first connecting portion 32 are composed of one or more surfaces. As shown in FIG. 3A, in Embodiment 1, the case where the outer surface and the inner surface of the first connecting portion 32 of the light-transmitting cover 30 are formed of one curved surface will be described. Here, when the outer surface portion and the inner surface portion of the first connecting portion 32 are composed of a plurality of surfaces, a plurality of curved surfaces having different curvatures, a plurality of planes having different angles, and a combination of these curved surfaces and planes. can be configured in combination. The second connecting portion 33 is a portion that connects the fixture-side ends of the pair of parallel portions 31, and is a portion that is accommodated in the mounting portion 25 when the lamp 3 is mounted on the lighting fixture 2. be. In Embodiment 1, the case where the outer surface portion and the inner surface portion of the second connection portion 33 in the translucent cover 30 are configured by one curved surface will be described. Here, when the outer surface portion and the inner surface portion of the second connecting portion 33 are composed of a plurality of surfaces, a plurality of curved surfaces having different curvatures, a plurality of planes having different angles, and a combination of these curved surfaces and planes. can be configured in combination.

The rib 34 is provided so as to protrude in the normal direction of the outer surface of the translucent cover 30 . In Embodiment 1, the ribs 34 are provided in each parallel portion 31 so as to protrude outward. Each rib 34 is integrally formed with the parallel portion 31 . Each rib 34 extends in the longitudinal direction X of the translucent cover 30 . The rib 34 is formed at a position facing the vicinity of the open end 26 of the fixture side portion 22 when the lamp 3 is attached to the lighting fixture 2 .

Further, in Embodiment 1, as shown in FIG. 3A, the translucent cover 30 can be divided into a first portion 300 and a second portion 301 in relation to the wiring material 85 . The first portion 300 of the light-transmitting cover 30 is a portion of the light-transmitting cover 30 with which the covering of the wiring material 85 may come into contact. Since it is preferable that the wiring member 85 is arranged in a region that does not block the light emitted from the lamp 3, the first portion 300 is positioned above at least the light emitting element 61 in the translucent cover 30. become part. The wiring region 29 of the wiring member 85 in the first embodiment is inside the mounting portion 25 . The first portion 300 is substantially a portion of the translucent cover 30 located above the ribs 34 . Here, of the outer peripheral portion 37 of the translucent cover 30 , a portion of the outer peripheral portion of the first portion 300 that is accommodated inside the instrument body 20 is referred to as a first outer peripheral portion 370 .

A second portion 301 of the translucent cover 30 is a portion exposed from the device body 20 . Therefore, it is at least a portion below the light emitting element 61 . Therefore, in Embodiment 1, the portion substantially below the rib 34 is exposed to the outside and serves as the second portion 301 of the translucent cover 30 that is directly affected by the special environment. Here, of the outer peripheral portion 37 of the translucent cover 30 , the outer peripheral portion of the second portion 301 is referred to as a second outer peripheral portion 371 .

The wiring member 85 has various wirings, such as the power supply line 81, the grounding line 82, and the control line 83, which are connected to the lamp fixture 3 from the outside. Terminals, wire holders, sockets, and the like for connecting these wires are also used as wiring members 85 . In FIG. 3A, the power line 81, the ground line 82 and the control line 83 connected to the lamp 3 are shown as a wiring material 85. FIG. The wiring members 85 may be arranged in the wiring area 29 in the mounting portion 25 in a state in which the wirings each covered with an insulating material are bundled together with a coating or bundled with a binding band. Moreover, each wiring may be arranged in the wiring area 29 in the mounting portion 25 in a state of being separated from each other.

<Details of translucent cover 30>
Next, based on FIG.3(b), the details, such as the structure of the translucent cover 30, are further demonstrated. The light-transmitting cover 30 accommodates and protects the light emitting unit 60, which is accommodated in the internal space, in the internal space. The light-transmitting cover 30, which has a light-transmitting property that transmits at least visible light, has a configuration in which a plurality of resin layers are laminated on a base material 30A. As shown in FIG. 3B, the light-transmitting cover 30 of Embodiment 1 has a first light-transmitting cover 30 on the outer wall surface side of the base material 30A when viewed from the light emitting unit 60, which is a light source housed in the internal space. A resin layer 30B and a second resin layer 30C are laminated in this order. Therefore, the second resin layer 30C becomes the outermost layer and is exposed to the special environment. In factories with special environments, lighting devices are often installed in a semi-outdoor environment such as under the eaves or in a completely outdoor environment. Therefore, moisture resistance, weather resistance, impact resistance, etc. are also required.

The base material 30A of the first embodiment requires hardness to the extent that it can cover and protect the mounting member 50, the light emitting section 60, the control section 80, and the like accommodated in the internal space. Therefore, the base material 30A has a thickness T0 of 0.8 mm or more even at the thinnest part.

The first resin layer 30B is a layer made of a resin having relatively higher gas barrier properties than the base material 30A and the second resin layer 30C. Also, the first resin layer 30B of Embodiment 1 can be made of a resin that is relatively more excellent in weather resistance than the base material 30A and the second resin layer 30C. On the other hand, the second resin layer 30C is a layer made of an excellent resin that has relatively higher chemical resistance than the substrate 30A and the first resin layer 30B. Further, the second resin layer 30C of Embodiment 1 can be made of a resin relatively superior in oil resistance and impact resistance to the base material 30A and the first resin layer 30B. Furthermore, the second resin layer 30C can be made of a resin that is relatively superior in water repellency and oil repellency to the base material 30A and the first resin layer 30B. Therefore, the second resin layer 30C has excellent resistance to external attacks. Here, the first resin layer 30B and the second resin layer 30C have a thickness T1 and a thickness T2 of more than 0 and not more than 0.8 mm, respectively, in order to maintain the above performance while maintaining translucency. . Here, it is assumed that there are two layers, the first resin layer 30B and the second resin layer 30C. If it is an outer layer, it may be two or more layers.

Specifically, for example, a polycarbonate-based resin is the material of the base material 30A. Further, for example, epoxy resin or polyvinylidene chloride resin is the material of the first resin layer 30B. For example, at least one of acrylic resin, polyarylate resin, acrylic urethane resin, and polyolefin resin is the material of the second resin layer 30C.

Translucent cover 30 of Embodiment 1 is formed by forming base material 30A into a cylindrical shape by, for example, extrusion molding or injection molding. Then, a coating or a film is adhered to the substrate 30A by applying a resin or the like to form the first resin layer 30B. Similarly, a coating or a film is applied to the first resin layer 30B by applying resin or the like to form the second resin layer 30C. The formed translucent cover 30 is cut to a required length according to product specifications and the like.

For example, in a semiconductor factory or the like, substances such as low-molecular-weight siloxane or VOCs (Volatile Organic Compounds) such as toluene, benzene, and xylene generated from equipment inside a translucent cover affect the semiconductor manufacturing process and yield. Therefore, there is a demand for a translucent cover that suppresses outflow of gas containing these substances. In addition, for example, in an environment where sulfur is used, such as in a rubber factory, there is a possibility that the sulfur gas may enter equipment and cause problems such as failure of LEDs, various electronic components, and the like. Gases such as chlorine, bromine, and ammonia as well as sulfur can similarly cause malfunctions in lighting devices. Therefore, it is necessary to prevent the exhaust of gas from the inside and the entry of gas from the outside in the lamp of the lighting device.

Here, even if the base resin is coated with acrylic, fluorine, or silicone resin, it may not be sufficient in a special environment where chemicals such as chemicals are used.

Therefore, in the lamp 3 of the lighting device 1 according to Embodiment 1, the translucent cover 30 is configured by combining and laminating a plurality of resin layers on the base material 30A. Translucent cover 30 of Embodiment 1 enhances gas barrier properties by having first resin layer 30B in combination with epoxy-based resin or polyvinylidene chloride-based resin. However, although the gas barrier property can be enhanced by the material that forms the first resin layer 30B, depending on the usage environment, other performance may also be desired to be enhanced, and the first resin layer 30B has sufficient performance. It is not necessarily the material that is used. For example, in a lighting device used under the special environment described above, it is better to have high chemical resistance. Therefore, by including acrylic resin, polyarylate resin, acrylic urethane resin, or polyolefin resin in the second resin layer 30C, oil resistance, solvent resistance, chemical resistance, moisture resistance, weather resistance, and impact resistance are improved. enhance sexuality. Thereby, the translucent cover 30 can improve at least gas barrier properties and chemical resistance. In addition, by combining the first resin layer 30B and the second resin layer 30C, the light-transmitting cover 30 simultaneously achieves improvements in oil resistance, solvent resistance, moisture resistance, weather resistance, and impact resistance. can do. Thereby, an excellent translucent cover 30 can be realized.

Here, epoxy resins and polyvinylidene chloride resins are resins having relatively low oil resistance, solvent resistance, chemical resistance, moisture resistance, weather resistance and impact resistance. Acrylic resins, polyarylate resins, acrylic urethane resins, and polyolefin resins are resins with poor gas barrier properties. Therefore, if the combination of the first resin layer 30B and the second resin layer 30C is opposite to the combination of the resins described above, the epoxy resin or the polyvinylidene chloride resin will be exposed to chemicals, and the resin will be denatured. Therefore, the gas barrier property may be lowered. Therefore, if the first resin layer 30B and the second resin layer 30C are laminated with resins of opposite combinations, it is difficult to simultaneously improve gas barrier properties and chemical resistance. Therefore, the second resin layer 30C is made of a resin that is highly resistant to attacks from the outside.

Here, in the translucent cover 30 of Embodiment 1, the first resin layer 30B and the second resin layer 30C are laminated on the entire outer wall surface of the tubular base material 30A. However, it is not limited to this. For example, the first resin layer 30B and the second resin layer 30C may be laminated on a portion of the base material 30A, such as the first outer circumference part 370 and the second outer circumference part 371 of the base material 30A. . For example, by not laminating the first resin layer 30B and the second resin layer 30C in places that are not exposed to the outside and are not clearly affected by the special environment, waste of material resins and work processes can be eliminated. can be done. Alternatively, the second resin layer 30C may be laminated on part of the first resin layer 30B.

FIG. 5 is an exploded perspective view of one end 3A of the lamp 3 according to Embodiment 1. FIG. The translucent cover 30 covers the light emitting surface of the light emitting element 61 arranged on the mounting member 50 and has an opening formed at the end portion 36 in the first direction which is the longitudinal direction X along the longitudinal direction of the mounting member 50 . ing. In other words, the translucent cover 30 is an elongated hollow body with at least one end 36 open, and accommodates the substrate 62 on which the light emitting element 61 is mounted. The cover end portions 35 are both end portions of the translucent cover 30 in the longitudinal direction X of the translucent cover 30 . An end portion 36 is provided at the cover end portion 35 of the translucent cover 30 . The end portion 36 is a portion to which the end cover 40 is fitted at the cover end portion 35 and is a portion covered with the end cover 40 which is an end lid. The end portion 36 is a free end that is movable along the first direction, which is the longitudinal direction X, along with the end cover 40 as the translucent cover 30 expands and contracts. Strictly speaking, the end portion 36 of the translucent cover 30 and the end portion cover 40 expand and contract in directions other than the "longitudinal direction X". It is assumed that the cover 30 has a structure (configuration) that allows expansion and contraction in the “longitudinal direction X”. The translucent cover 30 does not have ribs 34 formed on the outer surface of the end 36 so that it can be fitted with the end cover 40 . As described above, when the translucent cover 30 is manufactured by cutting a cylindrical member extruded by extrusion molding, the portion of the rib 34 extending in the longitudinal direction X corresponding to the end portion 36 is Deleted. As shown in FIGS. 3 and 5 , the outer peripheral portion 37 of the translucent cover 30 is the outer surface side of the outer shell portion that forms the set of parallel portions 31 , first connection portion 32 and second connection portion 33 . In addition, the inner peripheral portion 38 is the inner surface side of the outer shell portion that forms a set of the parallel portion 31 , the first connection portion 32 and the second connection portion 33 .

<Overview of end cover 40>
The end covers 40 are attached to both ends in the longitudinal direction X of the translucent cover 30 . The end cover 40 is fitted (fitted) with the sealing tool 43 interposed therebetween, so that the translucent cover 30 has a closed structure. Here, the mounting member 50 and the translucent cover 30 mounted on the end cover 40 are particularly resistant to changes in the operating environment temperature of the lighting device 1 and temperature changes between when the lamp 3 is turned on and when the lamp 3 is turned off. The amount of expansion and contraction is different. The end cover 40 has a structure such that the end portions of the light-transmitting cover 30 and the mounting member 50 in the longitudinal direction X are movable relative to each other while maintaining the sealing of the light-transmitting cover 30 . .

The end cover 40 has a first end cover 41 as an outer cover and a second end cover 42 as an inner cover. The first end cover 41 includes a first cover through hole 411, a first cover connecting hole 412, a connecting guide 413, a cover lower surface portion 414, a cover lower surface through hole 415, a cover wire holding portion 416, a cover end surface portion 417, and a cover end surface. It has a through hole 418 and an end cover perimeter 419 . Here, the cover lower surface through hole 415 is covered with the cover lid 49 as shown in FIG. Also, the second end cover 42 has a second cover main portion 420 , an end cover insertion portion 421 , a second cover engaging piece 422 , a second cover engaging claw 423 and an end cover inner peripheral portion 425 . Along the edge forming the end cover inserting portion 421, an inserting wall 421a is formed. Here, the first end cover 41 and the second end cover 42 of Embodiment 1 are described as being formed using a resin material. However, it is not limited to this. It may be formed using a metal material other than a resin material, a ceramic material, or the like. Further, in Embodiment 1, the first end cover 41 and the second end cover 42 are formed as separate members and integrated by fitting (fitting). You may make it shape|mold as one member.

<Sealing Tool 43>
The sealing members 43 are elastic seals arranged at both ends in the longitudinal direction X of the translucent cover 30 in a state of being sandwiched between both ends in the longitudinal direction X of the translucent cover 30 and the end covers 40 . It is a member. A sealing member 43 that is an elastic member is attached to the end portion 36 of the translucent cover 30 to close the opening of the end portion 36 . The sealing member 43 is made of a resin material and is an elastically deformable seal member (gasket, packing, etc.). Therefore, the sealing member 43 seals both ends of the translucent cover 30 in the longitudinal direction X while being sandwiched between both ends of the translucent cover 30 in the longitudinal direction X and the end covers 40 . . The sealing member 43 is formed of a resin material so as to be elastically deformable, and adheres tightly to the translucent cover 30 and the end cover 40 .

The closure 43 has a closure main portion 430 , an inner peripheral portion 435 , an outer peripheral portion 437 and a connecting portion 436 . The sealing member 43 has a sealing member main portion 430, an inner peripheral portion 435, an outer peripheral portion 437, and a connecting portion 436 integrally formed. The closure main portion 430 is formed so as to block the inside of the inner peripheral portion 435 . The closure main portion 430 is sandwiched between the fixing portion 56 of the fixture 54 and the second cover main portion 420 of the second end cover 42, which will be described later. The closure main portion 430 is formed in a plate-like shape, and in a state where the closure 43 and the end cover 40 are engaged, the wire insertion portion 431 and the sealing member 431 are formed on the side facing the end cover 40 . A stopper tubular portion 433 is formed. The closure main portion 430 contacts the second cover main portion 420 of the second end cover 42 when the closure 43 and the end cover 40 are engaged. The wire insertion portion 431 protrudes from the side facing the end cover 40 when the sealing member 43 and the end cover 40 are engaged, and passes through the power line 81, the ground line 82, and the control line 83. A wire insertion hole 432 is formed to allow the wire to pass through. Two sealing member tubular portions 433 are provided with the wire insertion portion 431 interposed therebetween. One may be sufficient, and three or more may be sufficient. The sealing member tubular portion 433 protrudes from the side facing the end cover 40 when the sealing member 43 and the end cover 40 are engaged with each other. The boss portion 57 protruding from the fixing portion 56 of the fixing member 54 is inserted into the sealing member cylindrical portion 433 when the sealing member 43 and the fixing member 54 are engaged with each other. The sealing member tubular portion 433 is formed in a cylindrical shape. A screw insertion hole 434 for screwing the fixing screw 75 is formed at the tip of the sealing member cylindrical portion 433 .

An inner peripheral portion 435 is formed at the peripheral edge portion of the closure main portion 430 formed in a plate shape. The inner peripheral portion 435 is aligned with the end cover inner peripheral portion 425 of the second end cover 42 when the sealing member 43 , which is an elastic member, is engaged with the second end cover 42 and the translucent cover 30 . It is a portion sandwiched between the end portion 36 of the translucent cover 30 and the inner peripheral portion 38 .

An outer peripheral portion 437 of the sealing member 43 is formed in an annular shape and arranged outside the inner peripheral portion 38 so as to face the inner peripheral portion 38 . The outer peripheral portion 437 is formed between the outer wall portion 410 a of the first end cover 41 and the outer peripheral portion of the translucent cover 30 when the sealing member 43 is engaged with the first end cover 41 and the translucent cover 30 . 37.

The connection portion 436 of the closure 43 is located between the inner peripheral portion 38 and the outer peripheral portion 437 of the closure main portion 430 . The connecting portion 436 connects the first cover main portion 410 of the first end cover 41 and the translucent cover 30 in a state where the sealing member 43 is engaged with the first end cover 41 and the translucent cover 30 . It is a portion sandwiched between the cover end portion 35 and the cover end portion 35 .

The connecting members 44 are connecting devices, are provided at both ends of the lamp 3 in the longitudinal direction X, and are mounting brackets for attaching the lamp 3 to the lighting device 2 . The connecting member 44 is attached to the fixture using two fixing screws 75 in a state in which the central side (X2 side) surface of the fixing portion 46 in the longitudinal direction X (first direction) and the end surface of the boss portion 57 are in contact with each other. 54 and fixed. The connecting member 44 is not directly fixed to the end cover 40 using screws or the like. The connecting member 44 is positioned and indirectly fixed via the sealing member 43 that is in close contact with the boss portion 57 of the fixture 54 . That is, the connecting member 44 is arranged outside the end cover 40 in the first direction, which is the longitudinal direction X of the lamp 3 , and is fixed to the mounting member 50 partially penetrating the end cover 40 . and another part is fixed to the lighting fixture 2 . In Embodiment 1, the connecting member 44 is formed by bending a metal plate. However, the connecting member 44 is not limited to being formed by bending a metal plate material, and may be formed using other materials such as resin, ceramic, etc., extrusion molding, It may be formed by other methods such as additive manufacturing. The connecting member 44 has a connecting portion 45 , a fixing portion 46 and an engaging portion 47 .

The connecting portion 45 is a plate-shaped member that extends from the lower end (Z2 side) of the fixing portion 46 toward the end portion side (X1 side) of the lamp 3 . That is, the connecting portion 45 is a plate-shaped member that protrudes from the lower edge portion of the fixing portion 46 . The connecting portion 45 protrudes to the opposite side of the end cover 40 when engaged with the end cover 40 . In other words, the connecting portion 45 protrudes in the direction opposite to the protruding direction of the engaging portion 47 . When the lamp 3 is attached to the lighting fixture 2 , the upper surface of the connecting part 45 other than the stepped part 450 contacts the connecting part 27 of the lighting fixture 2 .

A stepped portion 450 having different surface heights is formed in the connecting portion 45 , and a connecting screw insertion portion 451 into which the connecting screw 48 is inserted is formed in the stepped portion 450 . The stepped portion 450 is a portion that is partially recessed downward (Z2 side) in the central region of the connecting portion 45 in the lateral direction Y. As shown in FIG. A retaining washer 480 for fixing the connection screw 48 that has passed through the connection screw insertion portion 451 is arranged on the stepped portion 450 of the connection portion 45 . The retaining washer 480 is fitted to the connecting screw 48 in advance so as not to come off from the connecting screw 48 . The height (depth, step) dimension of the stepped portion 450 is the same as the thickness dimension of the retaining washer 480 . When the lamp 3 is attached to the lighting fixture 2, the upper (Z1 side) surface of the retaining washer 480 abuts the connecting portion 27 of the lighting fixture 2, and the lower (Z2 side) surface of the retaining washer 480 contacts the stepped portion 450 of the connecting member 44 . The shape and area of stepped portion 450 are determined in consideration of the shape and dimensions of retaining washer 480 . The connection screw insertion portion 451 is formed in a slit shape from the end portion side (X1 side) in the longitudinal direction X (first direction) at substantially the center of the stepped portion 450 in the lateral direction Y. As shown in FIG. The connection screw insertion portion 451 is formed with a width dimension larger than the shaft portion 481 of the connection screw 48, and the shaft portion 481 of the connection screw 48 is inserted therethrough. The shape of the connection screw insertion portion 451 is not limited to a slit shape, and may be a through hole having a circular or polygonal cross section including an elliptical shape.

The fixing portion 46 is a portion of the connecting portion 45 that stands upward from an end portion on the central side (X2 side) in the longitudinal direction X (first direction). The fixed portion 46 is a plate-like member. The fixing portion 46 clamps the end cover 40 and the sealing member 43 together with the fixing member 54 of the mounting member 50 . A fixing screw insertion hole 460 for screwing the fixing screw 75 is formed in the fixing portion 46 . The fixing screw insertion hole 460 is a through hole through which the fixing screw 75 to be screwed into the screw hole 58 of the boss portion 57 is inserted. The fixing portion 46 is attached to the boss portion 57 by fixing screws 75 inserted into the fixing screw insertion holes 460 .

The connecting member 44 is formed with a slit-like wire insertion hole 470 through which wires such as the power supply wire 81, the ground wire 82, and the control wire 83 are passed. The wire insertion hole 470 has an upper slit 4710 and an end slit 4711 . The wire insertion hole 470 formed in the fixed portion 46 is called an end slit 4711 . The end slit 4711 is formed in the vertical direction (Z-axis direction) of the connecting member 44 . The end slit 4711 is connected to an upper slit 4710 formed in the engaging portion 47 and described later.

An engagement piece insertion hole 461 may be formed in the fixed portion 46 . The engaging piece insertion hole 461 is a through hole provided in the fixing portion 46 corresponding to the cross-sectional shape of the second cover engaging piece 422 and the second cover engaging claw 423 of the second end cover 42 . The engaging piece insertion hole 461 is formed by the second cover engaging piece 422 and the second cover engaging claw 423 of the second end cover 42 that move in the longitudinal direction X (first direction) as the translucent cover 30 extends. are formed so as not to interfere with the fixed portion 46 of the connecting member 44 . The engagement piece insertion hole 461 is closed when the amount of extension of the translucent cover 30, that is, the amount of movement of the second cover engagement piece 422 and the second cover engagement claw 423 is small, or when the end cover 40 is If it is formed integrally, it is unnecessary and not an essential configuration of the lamp 3 .

The engaging portion 47 is a portion of the fixed portion 46 that extends from the upper (Z1 side) end toward the center (X2 side) in the longitudinal direction X (first direction). That is, the engaging portion 47 is a plate-shaped member that protrudes from the upper edge portion of the fixing portion 46 . The engaging portion 47 protrudes toward the end cover 40 when engaged with the end cover 40 , and is arranged on the upper side (Z1 side) of the lamp 3 in the lamp 3 .

As described above, the connecting member 44 is formed with a slit-like wire insertion hole 470 through which wires such as the power supply wire 81, the ground wire 82, and the control wire 83 are passed. A wire insertion hole 470 formed in the engaging portion 47 is referred to as an upper slit 4710 . The upper slit 4710 is formed along the longitudinal direction X of the lamp 3 . The upper slit 4710 is connected to an end slit 4711 formed in the fixed portion 46 . The upper slit 4710 is formed in the engaging portion 47 of the connecting member 44 so that the end portion 36 of the translucent cover 30 and the end cover 40 are free ends that are not restricted in movement in the longitudinal direction X (first direction). It is a formed slit. A cover wire holding portion 416 inserted through an insertion hole 472 (to be described later) engages with the upper slit 4710 while its movement in the lateral direction Y and the vertical direction Z is restricted. The cover wire holding portion 416 arranged in the insertion hole 472 is not restricted in movement in the longitudinal direction X (first direction). When the cover wire holding portion 416 is engaged with the upper slit 4710 , the position of the connecting member 44 with respect to the end cover 40 is determined. Alignment of the screw 75 becomes easier. When all or part of the power supply line 81, the ground line 82, and the control line 83 are bundled with a braided tube or the like, they are generally stiff and difficult to bend. However, since the connecting member 44 has end slits 4711 formed so as to be connected to the upper slits 4710 , even if the power supply lines 81 and the like are bundled and difficult to bend, wiring is facilitated.

The engaging portion 47 is formed with an insertion hole 472 into which a cover wire holding portion 416, which will be described later, is inserted. The insertion hole 472 is formed continuously with the upper slit 4710 . The insertion hole 472 is a through hole formed in the fixed portion 46 and is formed to be connected to the central side (X2 side) of the upper slit 4710 in the longitudinal direction X (first direction). The insertion hole 472 is formed with a shape and dimensions that allow the cover wire holding portion 416 to be inserted therein. The cover wire holding portion 416 inserted from the insertion hole 472 moves along the longitudinal direction X while being engaged with the upper slit 4710 in accordance with the extension of the translucent cover 30 . Therefore, the cover wire holding part 416 does not hinder the expansion and contraction of the translucent cover 30 and the movement of the end cover 40 and the sealing member 43 accompanying the expansion and contraction of the translucent cover 30 .

<Mounting member 50>
The mounting member 50 is a member for fixing the light emitting section 60, the control section 80 and the like in the space inside the translucent cover 30, as shown in FIGS. Also, the mounting member 50 is a member that fixes the mounting member 50 to the end covers 40 and connecting members 44 that are attached to both ends of the translucent cover 30 . The mounting member 50 has a pedestal 51 and a fixture 54 . The mounting member 50 is housed in the translucent cover 30 . Then, the mounting member 50 is fixed to the end cover 40 and the connecting member 44 by a fixing screw 75, as shown in FIG. Therefore, the mounting member 50 is not directly fixed to the translucent cover 30 , but is fitted (fitted) to the cover ends 35 on both sides in the longitudinal direction X of the translucent cover 30 . It is connected to the translucent cover 30 via 40 .

The pedestal 51 is a main part of the mounting member 50, and the light emitting section 60, the control section 80, and the like are mounted thereon. In Embodiment 1, the pedestal 51 is formed by bending a metal plate. However, the pedestal 51 is not limited to one formed by bending a metal plate material. It may be formed by other methods such as lamination molding. Although not shown, the pedestal 51 is surface-treated or a functional member is laid on the pedestal 51 in order to improve heat radiation efficiency (thermal emissivity) or light utilization efficiency (reflectance). You may The pedestal 51 has a mounting surface portion 52 and side portions 53 . The mounting surface portion 52 of the pedestal 51 is formed in a long flat plate shape, and the light emitting portion 60 is mounted on the surface on the irradiation side. In addition, a control section 80 such as a power supply device is attached to the back surface, which is the instrument side surface.

As shown in FIG. 5 , screw holes 520 are formed in the mounting surface portion 52 of the base 51 . The screw holes 520 are formed at both ends in the longitudinal direction X of the mounting surface portion 52 . A fixing screw 75 for fixing the mounting member 50 to the end cover 40 and the connecting member 44 is inserted into the screw hole 520 . The mounting surface portion 52 is formed with a notch portion 521 through which the power supply line 84 and the like are passed. The notch portions 521 are formed at the edges of the mounting surface portion 52 at both end portions in the longitudinal direction X of the mounting surface portion 52 . Here, a mounting hole 522 that is a through hole is formed in the mounting surface portion 52 at the other end of the lamp 3 instead of the notch portion 521 .

Side portions 53 of the pedestal 51 are standing portions that are bent from both ends of the mounting surface portion 52 in the short direction Y toward the irradiation side. The side portion 53 is erected from the edge portion of the mounting surface portion 52 along the longitudinal direction X of the mounting surface portion 52 , thereby improving the rigidity of the base 51 . In Embodiment 1, the side portion 53 is erected only on the instrument side where the control portion 80 and the like are arranged. However, the side portion 53 may be erected only on the irradiation side where the light emitting portion 60 is arranged, or may be erected on both the irradiation side and the instrument side. In Embodiment 1, the side portions 53 are erected at both ends of the mounting surface portion 52 in the transverse direction Y. It may be set up at the position of

The fixtures 54 are arranged at both ends of the base 51 in the longitudinal direction X, and are members for fixing the mounting members 50 to the end covers 40 and connecting members 44 mounted to both ends of the translucent cover 30 . . The fixture 54 passes through the end cover 40 and the connecting member 44 is fixed. Here, in Embodiment 1, the fixture 54 is configured as a separate member from the pedestal 51, but the configuration of the fixture 54 is not limited to this configuration. For example, the pedestal 51 and the fixture 54 may be integrally formed by bending both end portions of the pedestal 51 so that the pedestal 51 has a portion having the same function as the fixture 54 . The fixture 54 may be attached to the pedestal 51 using a fixing member such as a mounting screw (not shown).

The fixture 54 has a mounting portion 55 and a fixing portion 56, and is manufactured by bending a sheet metal. Although the fixture 54 is a metal fitting, it is not limited to a metal fitting. For example, it may be formed using other materials such as resin and ceramic. It may be formed by a method.

Attachment portions 55 of the fixture 54 are portions for attaching the fixture 54 to the base 51 , and are fixed to both end portions of the base 51 using fixing screws 75 . The mounting portion 55 may be structurally integrated with the pedestal 51 by, for example, caulking, welding, or fitting (engaging).

The fixing portion 56 of the fixture 54 sandwiches the end cover 40 and the sealing member 43 together with the fixing portion 46 of the connecting member 44 . That is, in a state in which the translucent cover 30, the sealing member 43, the end cover 40, and the connecting member 44 are combined, there is no seal between the fixing portion 56 and the fixing portion 46 of the connecting member 44. A stopper 43 is arranged. A boss portion 57 is provided on the fixed portion 56 .

The boss portion 57 is attached to the fixed portion 56 by, for example, caulking, welding, or fitting (engaging). A screw hole 58 into which a fixing screw 75 is screwed is formed in the boss portion 57 . A screw groove is formed on the inner peripheral side of the screw hole 58 . Then, from the outside of the connecting member 44, the fixing screw insertion hole 460 of the connecting member 44, the end cover insertion portion 421 of the second end cover 42, the first cover through hole 411 of the first end cover 41, and the sealing member The fixing screw 75 is inserted through the screw insertion hole 434 of 43 . A fixing screw 75 is screwed into the screw hole 58 of the boss portion 57 to fix the connecting member 44 to the fixture 54 of the mounting member 50 . That is, the connecting member 44 is fixed to the boss portion 57 of the fixture 54 .

<Light emitting unit 60>
As shown in FIG. 3, the light emitting section 60 serving as a light source has a light emitting element 61, a substrate 62, and the like. The light emitting element 61 emits light by power supply. In Embodiment 1, light emitting diodes (hereinafter referred to as LEDs) are used as the light emitting elements 61, and are arranged along the longitudinal direction X on the mounting surface of the substrate 62 in rows, zigzags, or the like. is implemented in The light-emitting element 61 of Embodiment 1 is packaged by arranging a phosphor that converts the wavelength of blue light into yellow light on an LED chip that emits blue light with a wavelength of 440 to 480 [nm]. It is a pseudo-white LED element that is a surface mount component. Here, the light emitted from the light emitting element 61 has the maximum luminous flux value and spreads by the irradiation angle α symmetrically with respect to the optical axis perpendicular to the light emitting surface. In Embodiment 1, it is assumed that the irradiation angle α of the light emitting element 61 is 120 degrees. A solid state laser, a semiconductor laser, an organic EL (Electro Luminescence), an inorganic EL, or the like may be used as the light emitting element 61 . The substrate 62 may be a glass-epoxy substrate (FR-4), a glass-composite substrate (CEM-3), a paper epoxy substrate (FR-3), a paper phenol substrate (XPC), a metal base substrate, or the like.

The control unit 80 performs light emission control of the light emitting unit 60 and the like, and also serves as a power supply device, converts power supplied from the outside into power for lighting the light emitting element 61 , and supplies the light emitting element 61 with the power. In Embodiment 1, as described above, the control unit 80 is attached to the back surface of the mounting surface portion 52 of the pedestal 51 using a fixing member such as a screw (not shown). It is housed in a cylindrical translucent cover 30 . However, the controller 80 may be attached to the lighting device 2 instead of the lamp device 3 . In this case, the electric wire serves as a power supply line that functions as a supply path for power supplied from the control unit 80 to the light emitting element 61 . One ends of electric wires such as power supply line 81 , ground line 82 and control line 83 in the first embodiment are connected to control unit 80 . The other end is connected to a terminal block (not shown) attached to the lighting fixture 2 .

As described above, in the first embodiment, in the translucent cover 30, the first resin layer 30B made of a resin having a high gas barrier property and the first resin A second resin layer 30C made of resin having high chemical resistance is provided outside the layer 30B. Therefore, it is possible to obtain the translucent cover 30 having at least excellent gas barrier properties and chemical resistance. In addition, by laminating the second resin layer 30C outside the first resin layer 30B made of resin with high chemical resistance, the base material 30A and the first resin layer 30B are protected from chemicals used in special environments. can do.

Further, in the translucent cover 30 of Embodiment 1, the base material 30A is made of a hard polycarbonate-based resin, so that the equipment such as the light-emitting part 60 housed inside can be protected. At this time, by setting the thickness of the base material 30A to 0.8 mm or more, it is possible to obtain hardness effective for protecting the device. In addition, by using epoxy resin or polyvinylidene chloride resin as the material for the first resin layer 30B, gas barrier properties and weather resistance can be improved. Furthermore, the second resin layer 30C is made of at least one of acrylic resin, polyarylate resin, acrylic urethane resin and polyolefin resin. Therefore, not only chemical resistance but also oil resistance, solvent resistance, moisture resistance, weather resistance and impact resistance can be improved.

Further, in the translucent cover 30 of Embodiment 1, by laminating the first resin layer 30B on a part of the base material 30A and laminating the second resin layer 30C on a part of the first resin layer 30B, the material It is possible to eliminate waste such as resin and work process.

In the translucent cover 30 of the first embodiment, the base material 30A is formed by extrusion molding or injection molding, and the first resin layer 30B and the second resin layer 30C are formed by applying coatings or films. Thus, the translucent cover 30 can be manufactured easily.

Embodiment 2.
Although the lighting device 1 of Embodiment 1 described above has been described by exemplifying a so-called trough-type lighting fixture 2, the lighting device 1 is not limited to this. In the lighting device 1, as the lighting fixture 2 to which the lamp 3 is attached, other shapes such as a so-called shaded type, a one-side reflection shaded type, or a V-shaped type can be adopted.

Further, in Embodiment 1, the lighting fixture 2 and the lighting fixture 3 that constitute the lighting device 1 are both elongated, but they are not limited to this. The lighting device 3 or the lighting device 2 to which the lighting device 3 is attached may be short. For example, the lamp 3 may have a shape in which the longitudinal dimension of the translucent cover 30 in the cylinder axis direction is smaller than the longitudinal dimension in the radial direction.

Further, in Embodiment 1, the lighting device 1 has been described as having the lighting device 2 and the lighting device 3, but the lighting device 1 is not limited to this. Instead of the lighting device 2, the lighting device 1 may be obtained by attaching the raceway to the lighting device 3 using the raceway as the attachment portion.

1 lighting device, 2 lighting equipment, 3 lamp, 3A end, 9 construction part, 20 equipment main body, 21 equipment bottom surface, 22 equipment side surface, 23 equipment end, 24 knockout, 25 mounting part, 26 opening end, 27 connecting portion, 28 screw hole, 29 wiring region, 30 translucent cover, 30A base material, 30B first resin layer, 30C second resin layer, 31 parallel portion, 32 first connection portion, 33 second connection portion, 34 rib, 35 cover end, 36 end, 37 outer periphery, 38 inner periphery, 40 end cover, 41 first end cover, 42 second end cover, 43 closure, 44 connecting member, 45 Connection Part 46 Fixing Part 47 Engagement Part 48 Connection Screw 49 Cover Lid 50 Mounting Member 51 Pedestal 52 Mounting Surface Part 53 Side Part 54 Fixture 55 Mounting Part 56 Fixing Part 57 Boss Part , 58 screw hole, 60 light emitting part, 61 light emitting element, 62 substrate, 75 fixing screw, 80 control part, 81 power supply line, 82 grounding line, 83 control line, 84 feeder line, 85 wiring material, 100 sealing structure, 300 first portion 301 second portion 370 first outer peripheral portion 371 second outer peripheral portion 410 first cover main portion 410a outer wall portion 411 first cover through hole 412 first cover connecting hole 413 connecting guide, 414 cover lower surface portion 415 cover lower surface through hole 416 cover electric wire holding portion 417 cover end surface portion 418 cover end surface through hole 419 end cover outer peripheral portion 420 second cover main portion 421 end cover insertion portion 421a Penetration wall 422 Second cover engaging piece 423 Second cover engaging claw 425 End cover inner peripheral portion 430 Seal main portion 431 Wire insertion portion 432 Wire insertion hole 433 Seal tubular shape Part 434 Screw insertion hole 435 Inner peripheral part 436 Connecting part 437 Outer peripheral part 450 Stepped part 451 Connection screw insertion part 460 Fixing screw insertion hole 461 Engagement piece insertion hole 470 Wire insertion hole 472 Insertion Hole, 480 retaining washer, 481 shaft, 520 screw hole, 521 notch, 522 mounting hole, 4710 upper slit, 4711 end slit.

Claims (14)

A translucent cover that covers a device including a light emitting part that serves as a light source,
a translucent base material;
A translucent first resin layer and a second resin layer laminated on the outer wall surface side of the base material when viewed from the light source,
The first resin layer is laminated on the base material and is made of a resin having a gas barrier property higher than that of the base material, and the second resin layer is positioned outside the first resin layer when viewed from the light source. and a translucent cover made of a resin having chemical resistance higher than that of the substrate and the first resin layer. 2. The translucent cover according to claim 1, wherein the second resin layer is made of a resin having higher weather resistance than the resin that is the material of the base material and the first resin layer. 3. The translucent cover according to claim 1, wherein the second resin layer is made of a resin having higher impact resistance than the resin that is the material of the base material and the first resin layer. The second resin layer according to any one of claims 1 to 3, wherein the material of the second resin layer is a resin having higher water repellency and oil repellency than the resin that is the material of the base material and the first resin layer. Translucent cover. The translucent cover according to any one of claims 1 to 4, wherein the base material is made of a polycarbonate resin. The translucent cover according to any one of claims 1 to 5, wherein the first resin layer is made of an epoxy resin. The translucent cover according to any one of claims 1 to 5, wherein the first resin layer is made of a polyvinylidene chloride resin. 8. The translucent light-transmitting device according to claim 1, wherein the second resin layer is made of at least one resin selected from acrylic resin, polyarylate resin, acrylic urethane resin and polyolefin resin. gender cover. The translucent cover according to any one of claims 1 to 8, wherein the first resin layer is laminated on the entire surface or part of the base material. The translucent cover according to any one of claims 1 to 9, wherein the second resin layer is laminated on the entire surface or part of the first resin layer. The thinnest part of the base material has a thickness of 0.8 mm or more, and the first resin layer and the second resin layer each have a thickness of more than 0 and 0.8 mm or less. Item 11. The translucent cover according to any one of Item 10. The base material is formed by extrusion molding or injection molding, and the first resin layer and the second resin layer are formed by applying a coating or a film. The translucent cover described in . a translucent cover according to any one of claims 1 to 12;
A lamp having a light-emitting portion that serves as a light source. a lamp according to claim 13;
and a lighting fixture having a mounting portion to which the lamp is mounted.

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