CN115315593A

CN115315593A - Lighting device

Info

Publication number: CN115315593A
Application number: CN202080098868.3A
Authority: CN
Inventors: 津山享平
Original assignee: Seiwa Electric Mfg Co Ltd
Current assignee: Seiwa Electric Mfg Co Ltd
Priority date: 2020-04-20
Filing date: 2020-04-20
Publication date: 2022-11-08
Also published as: WO2021214826A1

Abstract

The lighting device is provided with: an elongated lamp unit; and an elongated housing that houses the lamp unit. The housing includes a glass tube, end members provided at both ends of the glass tube, respectively, and a plurality of shafts connecting the pair of end members. One of the pair of end members is provided with a cover member for opening and closing the housing. At least a part of the plurality of shafts is disposed inside the glass tube. The lighting device is configured such that when the lamp unit is inserted into and removed from the housing in a state where the housing is open, the lamp unit is guided by the shaft in the glass tube.

Description

Lighting device

Technical Field

The present invention relates to a lighting device.

Background

Conventionally, explosion-proof lighting devices are known (for example, see patent document 1).

Such a lighting device includes an elongated lamp unit and an elongated housing that houses the lamp unit. The housing includes a glass tube and end members provided at both end portions of the glass tube, respectively. A cover member for opening and closing the housing is provided on one of the pair of end members. When the lamp of the lamp unit is replaced, the lamp unit is inserted into and removed from the housing with the cover member removed.

Documents of the prior art

Patent literature

Patent document 1: japanese Kokai publication Sho-64-44525

Disclosure of Invention

Problems to be solved by the invention

When the lamp unit is inserted into and removed from the housing, the glass tube may be damaged if the lamp unit contacts the glass tube.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an illumination device capable of suppressing damage to a glass tube.

Means for solving the problems

The lighting device of the present invention includes: an elongated lamp unit; and an elongated housing that houses the lamp unit. The housing includes a glass tube, end members provided at both ends of the glass tube, respectively, and a plurality of shafts connecting the pair of end members. One of the pair of end members is provided with a cover member for opening and closing the housing. At least a part of the plurality of shafts is disposed inside the glass tube. The lighting device is configured such that when the lamp unit is inserted into and removed from the housing in a state where the housing is open, the lamp unit is guided by the shaft in the glass tube.

With this configuration, the lamp unit can be prevented from contacting the glass tube by guiding the lamp unit, and thus damage to the glass tube can be prevented.

In the above lighting device, the lamp unit may include: a mounting plate to which the straight tube type lamp is detachably mounted; and a slide engaging portion provided on the mounting plate, the mounting plate being capable of mounting the lamp on one surface side, the slide engaging portion being provided on the other surface, the slide engaging portion being configured to be slidably engaged with the shaft in the glass tube.

In the lighting device in which the lamp unit includes the slide engagement portion, the housing may be provided with four shafts, the glass tube may be provided with two shafts inside, the glass tube may be provided with two shafts outside, and the slide engagement portion may be configured to be slidably engaged with the two shafts inside the glass tube.

In the illumination device provided with the four axes, a quadrangle in which the four axes are connected by straight lines at the arrangement positions may be an isosceles trapezoid, and the four axes may be arranged so that the center of gravity of the isosceles trapezoid coincides with the center of the glass tube.

Effects of the invention

According to the lighting device of the present invention, damage to the glass tube can be suppressed.

Drawings

Fig. 1 is a perspective view showing a lighting device of the present embodiment.

Fig. 2 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 1.

Fig. 3 is a perspective view showing a state in which the lamp unit is inserted into and removed from the housing in the lighting device of fig. 1.

Fig. 4 is a view of one end member of the lighting device of fig. 1 as viewed from the inside.

Fig. 5 is a view of the other end member of the lighting device of fig. 1 as viewed from the inside.

Fig. 6 is an enlarged perspective view of the other end portion of the lamp unit of the lighting device of fig. 1.

Detailed Description

Hereinafter, one embodiment of the present invention will be described.

First, an illumination device 100 according to an embodiment of the present invention will be described with reference to fig. 1 to 6.

The lighting device 100 is explosion-proof, and is used in a dangerous place such as a factory. As shown in fig. 1, the illumination device 100 includes an elongated lamp unit 1 and a housing 2. The lighting device 100 is configured such that the LED lamp 11 of the lamp unit 1 can be replaced. Specifically, as shown in fig. 3, a cover member 222 is provided on the housing 2, and the lamp unit 1 can be inserted into and removed from the housing 2 with the cover member 222 removed.

The lamp unit 1 is accommodated in the housing 2 and configured to be able to light the straight-tube LED lamp 11. The lamp unit 1 includes a mounting plate 12 to which the LED lamp 11 is detachably mounted, and a slide engagement portion 13 provided on the mounting plate 12. The LED lamp 11 is an example of the "lamp" of the present invention.

The mounting plate 12 is provided with sockets 123 at both ends in the longitudinal direction, and the sockets 123 are disposed on one surface side (Z2 direction side) so as to face each other. In the present embodiment, two sets of the pair of insertion holes 123 are provided so as to be adjacent to each other in the lateral direction (Y direction). That is, the mounting board 12 is configured to be able to mount two LED lamps 11 on one surface side.

A mounting surface 121 is formed at one end portion (end portion on the X1 direction side) in the longitudinal direction of the mounting plate 12, and a fitting surface 122 is formed at the other end portion (end portion on the X2 direction side) in the longitudinal direction of the mounting plate 12 (see fig. 6). A slide engagement portion 13 is provided on the other surface (surface on the Z1 direction side) of the attachment plate 12. The slide engaging portion 13 will be described later.

The housing 2 is formed in a hollow cylindrical shape and configured to accommodate the lamp unit 1 therein. As shown in fig. 1, the housing 2 includes a cylindrical glass tube 21,

end members

22 and 23 provided at both ends of the glass tube 21, respectively, and four shafts 24 to 27 (see fig. 2) connecting the pair of

end members

22 and 23. The end member 22 is an example of "one of a pair of end members" in the present invention, and the

shafts

24 and 25 are examples of "at least a part of a plurality of shafts" in the present invention.

The glass tube 21 is transparent and configured to transmit light emitted from the LED lamp 11.

The end member 22 is disposed at one end (end on the X1 direction side) in the longitudinal direction of the glass tube 21, and is configured to close the one end. The end member 22 includes a cylindrical body 221 and a cover member 222 detachably attached to the cylindrical body 221. The cylindrical body 221 has one end to which the cover member 222 is detachably attached, and the other end assembled to the glass tube 21. The housing 2 is sealed in a state where the cover member 222 is attached, and one end portion in the longitudinal direction of the housing 2 is opened in a state where the cover member 222 is detached. As shown in fig. 4, the tubular body 221 has a support 22a, an attachment portion 22b, four internal screw thread portions 22c to 22f, and a guide portion 22g.

The support base 22a is formed in an annular shape and configured to support one end portion in the longitudinal direction of the glass tube 21. The mounting portion 22b (see fig. 3) is formed to protrude inward (upward) from a lower end portion of the inner peripheral surface of the cylindrical body 221, and is configured to be able to mount the mounting surface 121 of the lamp unit 1.

The

internal thread portions

22c and 22d are formed in respective protruding portions protruding inward (downward) from the vicinity of the upper end portion of the inner circumferential surface of the tubular body 221, and the

internal thread portions

22e and 22f are formed in respective protruding portions protruding outward (downward) from the vicinity of the lower end portion of the outer circumferential surface of the tubular body 221. Therefore, the

internal thread portions

22c and 22d are disposed inside the holder 22a, and the

internal thread portions

22e and 22f are disposed outside the holder 22 a. The four female screw portions 22c to 22f are arranged such that a quadrangle obtained by connecting the arrangement positions by straight lines has an isosceles trapezoid shape, and the center of gravity of the isosceles trapezoid coincides with the center of the support 22 a. That is, the

internal thread portions

22c and 22d are disposed above (Z1 direction side) the

internal thread portions

22e and 22f, and the distance between the

internal thread portions

22c and 22d is shorter than the distance between the

internal thread portions

22e and 22 f.

The guide portion 22g is provided to guide the end portion 12a (see fig. 3) in the short side direction of the attachment plate 12 when the lamp unit 1 is inserted into and removed from the housing 2. The guide portion 22g is formed to protrude inward from the inner peripheral surface of the cylindrical body 221, and is disposed to face an intermediate portion in the height direction (Z1 and Z2 directions).

As shown in fig. 1, the end member 23 is disposed at the other end portion (end portion on the X2 direction side) in the longitudinal direction of the glass tube 21, and is configured to close the other end portion. The end member 23 is formed in a bottomed cylindrical shape, and the opening portion side is assembled to the glass tube 21. As shown in fig. 5, the end member 23 has a holder 23a, a receiving portion 23b, and four female screw portions 23c to 23f.

The support base 23a is formed in an annular shape and configured to support the other end portion in the longitudinal direction of the glass tube 21. The support 23a is disposed at a position corresponding to the support 22a, and is provided in a cylindrical portion of the bottomed cylindrical end member 23. The receiving portion 23b is provided to receive the fitting surface 122 of the lamp unit 1, and is disposed at a bottom surface portion (end surface portion) of the bottomed cylindrical end member 23. The receiving portion 23b has a pair of wall portions protruding inward (X1 direction side) from the bottom surface portion, and the pair of wall portions are formed to extend in the lateral direction (Y direction) so as to sandwich the fitting surface 122 between the pair of wall portions.

The

internal threads

23c and 23d are formed on respective protrusions protruding inward (downward) from the vicinity of the upper end of the inner circumferential surface of the cylindrical portion, and the

internal threads

23e and 23f are formed on respective protrusions protruding outward (downward) from the vicinity of the lower end of the outer circumferential surface of the cylindrical portion. Therefore, the

internal thread portions

23c and 23d are disposed inside the holder 23a, and the

internal thread portions

23e and 23f are disposed outside the holder 23 a. The four female screw portions 23c to 23f are arranged such that a quadrangle connecting the arranged positions by straight lines has an isosceles trapezoid shape, and the gravity center of the isosceles trapezoid coincides with the center of the support base 23 a. That is, the

internal thread portions

23c and 23d are disposed on the upper side (Z1 direction side) with respect to the

internal thread portions

23e and 23f, and the distance between the

internal thread portions

23c and 23d is shorter than the distance between the

internal thread portions

23e and 23f. Therefore, the four internal screw threads 23c to 23f are disposed at positions corresponding to the four internal screw threads 22c to 22f, respectively.

As shown in fig. 2, the shafts 24 to 27 have a circular cross-sectional shape, and have male screw portions (not shown) formed at both ends. One end of the shaft 24 is screwed into the female screw portion 22c of the end member 22, and the other end of the shaft 24 is screwed into the female screw portion 23c of the end member 23. One end portion of the shaft 25 is screwed into the internal thread portion 22d of the end member 22, and the other end portion of the shaft 25 is screwed into the internal thread portion 23d of the end member 23. One end of the shaft 26 is screwed into the internal thread portion 22e of the end member 22, and the other end of the shaft 26 is screwed into the internal thread portion 23e of the end member 23. One end portion of the shaft 27 is screwed into the internal thread portion 22f of the end member 22, and the other end portion of the shaft 27 is screwed into the internal thread portion 23f of the end member 23. Therefore, the

end members

22 and 23 are connected by the shafts 24 to 27, and the glass tube 21 is sandwiched between the

end members

22 and 23.

The

shafts

24 and 25 are disposed inside the glass tube 21, and are disposed on the upper side (Z1 direction side) inside the glass tube 21. The

shafts

26 and 27 are disposed outside the glass tube 21 and on the lower side (Z2 direction side) of the housing 2. The

shafts

26 and 27 are disposed outside the irradiation range of the LED lamp 11. The four shafts 24 to 27 are arranged such that a quadrangle connecting the arrangement positions by straight lines has an isosceles trapezoid shape, and the center of gravity of the isosceles trapezoid coincides with the center of the glass tube 21. The arrangement position is an arrangement position when viewed from the longitudinal direction of the housing 2 (the axial direction of the shafts 24 to 27). In an isosceles trapezoid formed by the four shafts 24 to 27, a straight line connecting the

shafts

26 and 27 is a lower base, a straight line connecting the

shafts

24 and 25 is an upper base, and a straight line connecting the

shafts

24 and 26 and straight lines connecting the

shafts

25 and 27 are waists.

As shown in fig. 1, an attachment piece 223 is provided at the upper end of the end member 22, and an attachment piece 231 is provided at the upper end of the end member 23. The

attachment pieces

223 and 231 are provided to attach the lighting device 100 to an installation object such as a ceiling. Specifically, one surface 151a of the attachment fitting 151 is fixed to the installation object, and one blade 152a of the hinge 152 is fixed thereto. The attachment piece 223 is detachably attached to the other surface 151b of the attachment fitting 151, and the attachment piece 231 is attached to the other blade 152b of the hinge 152.

Here, as shown in fig. 6, the slide engaging portion 13 of the lamp unit 1 is disposed at the other end portion (end portion on the X2 direction side) in the longitudinal direction of the attachment plate 12. The slide engaging portion 13 is provided to move the lamp unit 1 along the

shafts

24 and 25 when the lamp unit 1 is inserted into and removed from the housing 2. That is, the slide engaging portion 13 is configured to slidably engage with the two

shafts

24 and 25 in the glass tube 21.

The slide engagement portion 13 includes a mounting portion 131 mounted to the mounting plate 12, and a pair of left and right retaining springs 132 and 133 extending from the mounting portion 131. The mounting portion 131 is mounted on the other surface (surface on the Z1 direction side) of the mounting plate 12. As shown in fig. 2, the holding springs 132 and 133 are configured to clamp the

shafts

24 and 25 from the outside.

Specifically, the holding spring 132 includes an arm portion 132a extending from the mounting portion 131 to one side and an arc-shaped holding portion 132b formed at a distal end of the arm portion 132 a. The holding spring 132 is configured such that the arm portion 132a is elastically deformable, and the holding portion 132b holds the shaft 24. The holding spring 133 includes an arm portion 133a extending from the mounting portion 131 to the other side, and an arc-shaped holding portion 133b formed at the tip of the arm portion 133 a. The holding spring 133 is configured such that the arm 133a is elastically deformable and the holding portion 133b holds the shaft 25.

In this way, when the slide engaging portion 13 is engaged with the

shafts

24 and 25 and the lamp unit 1 is suspended from the

shafts

24 and 25, the LED lamp 11 positioned below the slide engaging portion 13 is separated from the glass tube 21.

Actions when replacing LED lamps

Next, an operation when the LED lamp 11 is replaced in the illumination device 100 of the present embodiment will be described.

First, as shown in fig. 1, the attachment piece 223 of the end member 22 is detached from the other surface 151b of the attachment fitting 151. Then, the housing 2 is rotated about the hinge 152, and the one end portion side (X1 direction side) of the housing 2 is lowered. Thus, even when a plurality of lighting devices 100 are provided in series, the LED lamp 11 can be replaced without interference with the adjacent lighting device 100.

Next, as shown in fig. 3, by removing the cover member 222 of the end member 22, one end (end on the X1 direction side) of the housing 2 is opened. Then, the attachment surface 121 of the lamp unit 1 is detached from the attachment portion 22b of the end member 22. Thereafter, one end portion (end portion on the X1 direction side) of the lamp unit 1 is held, and the lamp unit 1 is pulled out to one side (X1 direction side) from the housing 2. At this time, the slide engaging portion 13 engages with the

shafts

24 and 25, and the other end portion (end portion on the X2 direction side) of the lamp unit 1 moves along the

shafts

24 and 25. That is, the other end portion of the lamp unit 1 is guided by the

shafts

24 and 25, and therefore the lamp unit 1 is hard to contact the glass tube 21.

When the other end of the lamp unit 1 reaches the one end of the housing 2, the slide engaging portion 13 is disengaged, and the lamp unit 1 is removed from the housing 2. Then, the LED lamp 11 is detached from the mounting board 12, and a new LED lamp 11 is mounted on the mounting board 12.

Next, the slide engaging portion 13 of the lamp unit 1 after the lamp replacement is engaged with the

shafts

24 and 25. Then, the lamp unit 1 is inserted into the other side (X2 direction side) of the housing 2. At this time, the other end portion of the lamp unit 1 moves along the

shafts

24 and 25. The end 12a of the attachment plate 12 is guided by a guide 22g (see fig. 4). Therefore, the lamp unit 1 is difficult to contact with the glass tube 21.

Next, the fitting surface 122 (see fig. 6) of the mounting plate 12 is fitted to the receiving portion 23b (see fig. 5) of the end member 23, and the mounting surface 121 of the mounting plate 12 is mounted to the mounting portion 22b of the end member 22. Thereby, one end portion of the lamp unit 1 in the housing 2 is supported by the end member 22, and the other end portion is supported by the end member 23. Thereafter, the cover member 222 is attached to the cylindrical body 221 to seal the housing 2, and the attachment piece 223 of the end member 22 is attached to the other surface 151b of the attachment fitting 151.

Effects-

In the present embodiment, as described above, the

shafts

24 and 25 are disposed inside the glass tube 21, and the slide engaging portion 13 is provided in the lamp unit 1, so that when the lamp unit 1 is inserted into and removed from the housing 2, the lamp unit 1 is guided along the

shafts

24 and 25, whereby the contact between the lamp unit 1 and the glass tube 21 can be suppressed, and therefore, damage to the glass tube 21 can be suppressed. Further, by causing the

shafts

24 and 25 of the shafts 24 to 27 connecting the

end members

22 and 23 to function as guide rails, an increase in the number of components can be suppressed as compared with the case where dedicated guide rails (not shown) are provided.

In the present embodiment, the slide engaging portion 13 engages with the two

shafts

24 and 25, whereby the position of the lamp unit 1 with respect to the housing 2 can be easily stabilized, as compared with the case where the slide engaging portion engages with one shaft.

Other embodiments

The embodiments disclosed herein are illustrative in all respects and are not to be construed as limiting. Therefore, the technical scope of the present invention is defined not by the above embodiments alone, but by the description of the technical means. The technical scope of the present invention includes all modifications within the meaning and range equivalent to the technical means.

For example, in the above-described embodiment, the lamp unit 1 is configured to be able to light the LED lamp 11, but the present invention is not limited thereto, and the lamp unit may be configured to be able to light another lamp.

In the above embodiment, the example in which the two LED lamps 11 are detachably attached to the lamp unit 1 is shown, but the present invention is not limited thereto, and the number of the LED lamps detachably attached to the lamp unit may be any number.

In the above embodiment, the case 2 is provided with the four shafts 24 to 27, but the present invention is not limited thereto, and the number of shafts provided in the case may be any number as long as it is a plurality of shafts.

In the above embodiment, the example in which the two

shafts

24 and 25 are provided inside the glass tube 21 is shown, but the present invention is not limited thereto, and the number of shafts provided inside the glass tube may be any number.

In the above embodiment, the example in which the two

shafts

24 and 25 out of the four shafts 24 to 27 are disposed inside the glass tube 21 is shown, but the present invention is not limited thereto, and all of the plurality of shafts may be disposed inside the glass tube.

In the above embodiment, the cross-sectional shape of the shafts 24 to 27 is circular, but the present invention is not limited thereto, and the cross-sectional shape of the shafts may be polygonal.

Industrial applicability

The present invention is applicable to a lighting device including an elongated lamp unit and an elongated housing accommodating the lamp unit.

Description of the reference numerals

1: a lamp unit;

2: a housing;

11: LED lamps (lamps);

12: mounting a plate;

13: a slide engaging portion;

21: a glass tube;

22. 23: an end member;

24 to 27: a shaft;

100: an illumination device;

222: a cover member.

Claims

1. A lighting device is characterized in that a lamp body is provided,

the lighting device is provided with:

an elongated lamp unit; and

an elongated housing accommodating the lamp unit,

the housing includes a glass tube, end members provided at both ends of the glass tube, respectively, and a plurality of shafts connecting the pair of end members,

a cover member for opening and closing the housing is provided on one of the pair of end members,

at least a portion of the plurality of shafts is disposed inside the glass tube,

the lighting device is configured such that, when the lamp unit is inserted into and removed from the housing in a state where the housing is open, the lamp unit is guided by a shaft in the glass tube.

2. The lighting device of claim 1,

the lamp unit includes: a mounting plate to which the straight tube type lamp is detachably mounted; and a slide engaging portion provided on the mounting plate,

the mounting plate has a surface on which the lamp can be mounted and a surface on which the slide engaging portion is provided,

the slide engagement portion is configured to be slidably engaged with a shaft in the glass tube.

3. The lighting device of claim 2,

four shafts are provided on the housing, two shafts are disposed inside the glass tube, two shafts are disposed outside the glass tube,

the slide engaging portion is configured to slidably engage with two shafts in the glass tube.

4. The lighting device of claim 3,

the four axes are arranged such that a quadrangle obtained by connecting the arrangement positions by straight lines becomes an isosceles trapezoid, and the center of gravity of the isosceles trapezoid coincides with the center of the glass tube.