JPH0247537Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a sealed lighting fixture in which a lamp tube and a lighting device are housed in a sealed case.

[Background technology] Conventionally, sealed lighting equipment used under adverse conditions is
It has a structure that is particularly waterproof and airtight against water and oil.As an example, as shown in FIG. There is a device that is sealed by attaching a pair of sealing means 80 to each of them.
The sealing means 80 includes a cap 82 that closes openings at both ends of the case 81, a tightening ring 84 having a rib 85 formed at one end and inserted into one end of the case 81 and screwed into the cap 82, and a rib 85 of the tightening ring 84. The case 81 is attached to the inner peripheral edge of the case 81 and is rolled in the inner radial direction between the cap 82 and the tightening ring 84 to face each other when the tightening ring 84 is tightened by screwing into the cap 82.
The seal 83 is made of an elastic sealing material such as rubber and is pressed against the outer periphery of the seal 83.

Another example is disclosed in Japanese Utility Model Application No. 52-90980. That is, as shown in FIG. 7, a sealing means 90 having a built-in socket is attached to and sealed at both end openings of a case 91 housing a lamp tube 98. This sealing means 90 includes a cap 92 that has a built-in socket and closes the opening of the case 91, a tightening ring 94 that is screwed onto the cap 92, and a rib that is attached to and extends from the opening edge of the cap 92 and that is ribbed on the outer peripheral edge. It is composed of a rib ring 95 having a rib ring 96 and a gasket 93 that is fitted into the rib ring 95 and the cap 92. As shown in FIG. 8, the peripheral edge of the packing 93 fitted into the rib ring 95 is provided with a thin portion 97 whose diameter is enlarged by swelling deformation.
The sealing means 90 is attached to the cap 92 such that the thin wall portion 97 of the packing 93 is located within the end of the case 91.
, rotate the tightening ring 94 to move it toward the rib 96, and pinch the packing 93 with the rib 96 to bulge and deform the thin part 97 of the packing 93, expanding the diameter in the outer radial direction. It is adapted to be attached to the inner wall of the case 91 in pressure contact and in close contact with the inner wall of the case 91.

In the conventional structure of the sealing means 80, 90, the tightening means for pinching the gaskets 83, 93 was screwed around the extension direction of the cases 81, 91, so manual tightening was required. However, there was a problem in that the reliability of the waterproof performance after installation tended to vary due to differences in the tightening force between people. Furthermore, when used in a location where oil may come into contact with the tightening ring 94, a gap 100 is provided between the tightening ring 94 and the case 91 so that the tightening ring 94 can be rotated and screwed around the outer periphery of the case 91, as shown in FIG. Because of this, oil can get in and cause damage to the gasket 9.
There was a risk that the oil would adhere to No. 3 and cause the packing 93 to deteriorate. In addition, when installing the latter, the cap 92 is held with one hand so that the thin wall part 97 of the gasket 93 is positioned within the end of the case 91, and the tightening ring 94 is tightened with the other hand. If it is not held in a predetermined position, as shown in FIG. 9, there is a risk that it will come into pressure contact with the edge of the case 91, and there is a risk that the seal 93 will not be in sufficient contact with the case 93 and the waterproofness will be impaired.

[Purpose of the invention] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an enclosed lighting fixture that can improve waterproofness and realize highly reliable sealing.

[Disclosure of the invention] The sealed lighting device of the invention includes a transparent cylindrical case that houses a lamp tube and a lighting device inside,
a pair of sealing means for closing and sealing both end openings of the case, the sealing means being fitted over the entire surface of the end opening of the case, and close to the inner circumferential wall of the end of the case. A stopper having opposing circumferential side walls, an annular band-shaped packing wound around the circumferential side walls, and a ring band-shaped packing that is pressed against the peripheral edge of the end of the packing and inserted into the gap between the inner circumferential wall of the case and the circumferential side wall. The deformation of the seal forms a multi-ply annular seal part, and the pressure-welding body is tightened and fixed to the bottom surface of the stopper within the case by means of a mounting screw screwed into the stopper from the outside, and the case and Waterproofness can be improved by doubly sealing the gap with the plug body, and the sealing means is attached by screwing and fixing the press-fitting body to the plug body side, which eliminates the difference in human force as in the past. The seal can be reliably sealed without any variation in sealing reliability.

Embodiment 1 As shown in FIG. 1, the sealed lighting fixture of the present invention includes a lamp tube 50 such as a fluorescent lamp or a lamp tube 5.
A lighting device 60 such as a ballast for lighting 0
is stored in a transparent cylindrical case 1,
The openings at both ends thereof are configured to be sealed by a pair of sealing means 10. The case 1 has a power line 61 extending from one end thereof, and can be attached to a predetermined location using fixtures 70, 70 attached to the ends of the case 1.

The sealing means 10 includes a circumferential side wall 22 and is inserted into the end of the case 1 so as to cover the entire surface of the end opening of the case 1.
A plug body 2 is fitted with the end edge of the case 1, and a thick wall portion 31 is fitted into the circumferential side wall 22 of the plug body 2, and a thick wall portion 31 is formed at the end periphery of the circumferential side wall 22 of the plug body 2. A ring-shaped gasket 3 made of an elastic sealing material such as rubber is attached to the bottom surface 23 of the stopper 2 by a mounting screw 8, and the peripheral edge is attached to a thick wall portion of the gasket 3 near the inner wall of the case 1. 31. Here, one end edge of the gasket 3 extends to the bottom of the annular groove 21 and is interposed between the opening periphery of the case 1 fitted in the annular groove 21 and the stopper 2 to protect the periphery of the case 1. It's meant to be protected. A step 24 is formed at one end of the circumferential side wall 22 opposite to the periphery of the press member 4, and the thick portion 31 of the packing 3 is attached to the step 24.
and the circumferential edge of the press-contact body 4 .

A method for attaching the sealing means 10 will be described below. As shown in FIG. 4a, the sealing means 10, when in use,
A gasket 3 is fitted onto the outer circumferential surface of the circumferential side wall 22 of the plug body 2, and the press member 4 is attached to the bottom surface 2 of the plug body 2 within the case 1.
3 by tightening a mounting screw 8 to form an integral part. Fit the edge of the case 1 into the annular groove 21 of the plug 2, and tighten the mounting screw 8 with a simple tool such as a screwdriver while pressing the plug 2 toward the case 1, as shown in Figure 4b. As the press member 4 moves toward the plug 2, the entire thin wall portion 32 of the packing 3 is compressed and deformed toward the plug 2, forming an at least one bellows-shaped annular deformed portion 33. The gap between the circumferential side wall 22 of the body 2 and the inner circumferential wall of the case 1 is filled and they are brought into close contact with both, and then, as shown in FIG. 4c,
Furthermore, by tightening the mounting screws 8, the thick wall portion 31 is rolled between the pressure contact body 4 and the stepped portion 24, expands in the outer diameter direction of the case 1, and is pressed against the inner circumferential wall of the case 1. It is adapted to come into close contact with the inner wall of the case 1 and the circumferential side wall 22 of the plug body 2. In this way, the gap between the plug body 2 and the inner wall of the case 1 is
A plurality of annular seal portions 30 formed of an annular deformed portion 33 of a thick wall portion 31 and a thin wall portion 32 are formed on the inner circumferential edge of the case 1 for sealing. Here, the tip of the mounting screw 8 is designed not to penetrate the pressure contact body 4 in order to maintain airtightness with the outside. Further, at the bottom of one of the pair of plugs 2 attached to both ends of the case 1, a cable gland 11 is provided for extending a power line 61 from a lighting device inside the case 1 to the outside. Here, the outer diameter of the annular groove part 21 of the plug body 2 into which the edge of the case 1 is fitted needs only to be such that the case 1 can be fitted therein. By pressing against the outer wall of the case 1 whose diameter is about to expand in the direction, it is possible to effectively prevent the end portion of the case 1 from being damaged. Further, since only the outer peripheral edge of the stopper 2 protrudes from the outer wall of the case 1, cleaning of the outer wall of the case 1 is facilitated. In addition, since the seal 3 is rolled while the plug body 2 is pressed against the edge of the case 1, the thin wall portion 32 where the annular deformation portion 33 is formed is
can be reliably located within the edge of case 1;
This prevents the waterproof effect from weakening due to pressure contact with the edge of the case 1. In addition, when removing the sealing means 10, as shown in FIG. 1, the thick walled portion 3 is removed by wiping off the oil attached to the outside of the annular deformed portion 33.
This prevents deterioration caused by oil in step 1.

Embodiment 2 In this embodiment, as shown in FIG. 5, the packing 9 is inserted into the mounting screw 8 of Embodiment 1 and then screwed onto the plug body 2. That is,
With this configuration, threaded parts such as mounting screws and screw holes are protected from outside air and liquids such as water. The other configurations are the same as in Example 1, and the same reference numerals indicate similar components.

[Effects of the invention] The sealed lighting device of the invention includes a transparent cylindrical case that houses a lamp tube and a lighting device inside,
a pair of sealing means for closing and sealing both end openings of the case, the sealing means being fitted over the entire surface of the end opening of the case, and close to the inner circumferential wall of the end of the case. A stopper having opposing circumferential side walls, an annular band-shaped packing wound around the circumferential side walls, and a ring band-shaped packing that is pressed against the peripheral edge of the end of the packing and inserted into the gap between the inner circumferential wall of the case and the circumferential side wall. The deformation of the seal forms a multi-ply annular seal part, and the pressure-welding body is tightened and fixed to the bottom surface of the stopper within the case by means of a mounting screw screwed into the stopper from the outside, and the case and Waterproofness can be improved by double-sealing the space between the sealing member and the plug, and the sealing means can be attached by simply screwing the press-fitting member to the plug, eliminating the need for the difference in force as in the conventional method. This means that the seal can be reliably sealed without any variation in sealing reliability.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of an embodiment of the present invention, Fig. 2 is a sectional view of the main parts of the same, Fig. 3 is a sectional view of the main parts showing the removal method of the above, and Fig. 4 shows the installation method of the same. 5 is a sectional view of essential parts of another embodiment same as above; FIG. 6 is a sectional view of essential parts showing a conventional example; FIG. 7 is a sectional view of essential parts of another conventional example same as above. , FIG. 8 is a sectional view of the main parts of the same as above, FIG. 9 is a sectional view of the main parts of the same as above, and FIG. is a pressure welding body,
8 is a mounting screw, 22 is a circumferential side wall, 30 is an annular seal portion, 50 is a lamp tube, and 60 is a lighting device.

Claims (1)

[Scope of utility model registration request] It consists of a transparent cylindrical case that houses a lamp tube and a lighting device inside, and a pair of sealing means that close and seal the openings at both ends of the case. a stopper having a circumferential side wall that is fitted over the inner circumferential wall of the case and is close to and opposed to the inner circumferential wall of the end of the case; a ring-shaped packing wound around the circumferential side wall; and a circumferential edge of the end of the packing. A plurality of annular seals are formed by deformation of the gasket in the gap between the inner circumferential wall of the case and the circumferential side wall of the case, and a mounting screw screwed into the plug from the outside allows the plug to be inserted into the case. An enclosed lighting fixture characterized by comprising a press-fitting body that is tightened and fixed to the bottom of the body.