JP2020059232A - Sealed structure of casing - Google Patents

Abstract

To solve the problem in which when a lid is attached to the opening of a casing whose outer periphery is coated with decoration and the lid is welded to the casing, the decorative treatment is damaged because a part of the casing is melted, and when that part is seen, the design quality is impaired.SOLUTION: In the case of welding the ribs to the lid which closes the opening, if the circumference of the casing is coated, the ribs are formed inwards at a predetermined distance from the circumference of the casing so that even if the ribs are melted, they do not affect the circumference of the casing.SELECTED DRAWING: Figure 3

Description

  TECHNICAL FIELD The present invention relates to a closed structure of a casing, in which a lid is attached to an opening of a casing main body, and the lid is welded to the casing main body over the entire circumference to hermetically seal an inner space of the casing from the outside.

  In a luminaire having a tubular body with a rectangular cross section as the casing body, the lid body is fitted into the openings at both ends of the casing body, and the lid body is welded over the entire circumference of the opening of the casing body to reduce the internal space of the casing body. There is known one that is hermetically sealed from the outside (see, for example, Patent Document 1).

JP-A-2016-203477 (FIGS. 2 and 3)

  In the above-mentioned conventional structure, the entire outer peripheral surface of the casing body is subjected to a cosmetic treatment so that it can be visually observed. Specifically, the surface is molded into a flat surface, which is a flat surface as a whole and has a uniform gloss.

  However, in the above-mentioned conventional welding method, since the end portion of the casing body is welded, a part of the peripheral surface that is subjected to the makeup treatment is once melted by the welding, the makeup treatment is lost, and both end portions of the casing body become ugly. This causes a problem that the design value is lost.

  In view of the above problems, it is an object of the present invention to provide a casing sealing structure that does not impair the cosmetic treatment on the side surface even if the lid is welded to the opening of the casing body.

  In order to solve the above problems, the casing sealing structure according to the present invention has a structure in which a lid that closes the opening is welded to an annular rib that is erected on the peripheral wall of the opening formed in the resin casing body. In the sealed structure of the casing, the peripheral surface of the casing is subjected to a cosmetic treatment that is visually observable, and the rib is formed inside the peripheral surface by a predetermined distance.

  When the ribs are welded, even if the ribs are once melted after the molding and the surface is subjected to a makeup treatment, the makeup treatment will be impaired, but since the ribs are provided inside from the peripheral surface requiring the makeup treatment, The cosmetic treatment applied to the surface is not damaged. The makeup treatment here is a treatment such as coating or coating after formation, treatment having low surface roughness and luster, or treatment such as intentional satin treatment. including.

  With the above configuration, even if the ribs are melted for welding, the cosmetic treatment on the peripheral surface of the casing body is not damaged, but the visual appearance of the ribs may impair the overall design. In such a case, it is desirable that the rib is curved inward while being welded to the lid so that it is hard to be visually recognized from the outside.

  If the curved angle of the rib is further increased, the curved rib may interfere with the lid to limit the curved angle. In such a case, it is desirable that the lid body be formed with a groove for accommodating the inwardly curved rib.

  As is clear from the above description, the present invention does not impair the cosmetic treatment applied to the peripheral surface of the casing body when welding the lid body to the opening of the casing body, so that the design of the casing body deteriorates. There is no.

The figure which shows the state which installed the lighting fixture to which this invention is applied in the kitchen. Figure showing the state of the opening before attaching the lid The figure which shows the 1st process of welding a lid to a casing. The figure which shows the 2nd process of welding a lid to a casing. Diagram showing the structure of the heater Sectional drawing of other embodiment

  Referring to FIG. 1, reference numeral 1 denotes a lighting fixture according to the present invention, which is attached to a lower surface of a hanging cabinet L of a kitchen. This luminaire 1 has a cylindrical casing 2 having a transparent lower surface and a front side surface, and the other two surfaces made of opaque resin, and a pair of lids 3 welded to both end surfaces of the casing 2. It is composed of. The casing 2 is formed by extrusion molding, and the outer peripheral surface 21 has a glossy cosmetic treatment.

  When the lids for closing the openings at both ends are welded, the peripheral edge of the opening at the end of the casing 2 is melted, so that the above-mentioned makeup treatment is impaired. Then, since both ends of the casing 2 have different appearances from the other parts that have been subjected to the makeup treatment, the design is impaired.

  Therefore, as shown in FIG. 2, a rib 22 for welding is provided at the end of the casing 2 on the inner side of the outer peripheral surface 21 on which the cosmetic treatment is applied. Further, the lid 3 is provided with a peripheral wall 31 that is welded to face the welding rib 22, and a groove portion 32 is formed inside the peripheral wall 31.

  A cylindrical sleeve 6 formed by extrusion molding as a separate body from the casing 2 was inserted into the casing 2. Since the openings are formed at both ends of the casing 2 in the present embodiment, the length of the sleeve 6 is made shorter than the length of the casing 2 by a dimension twice the thickness of the lid 3. . When the lid body 3 is fitted into the opening of the casing, the lid body 3 comes into contact with the end surface 61 of the sleeve 6, and the lid body 3 is positioned at a predetermined position. Reference numeral 4 shown in the figure is a circuit board on which a plurality of LEDs 41 are mounted on one surface at predetermined intervals.

  With reference to FIG. 3, reference numeral 5 is a jig that can move in the vertical direction. The jig 5 is made of metal to ensure strength. A heater 7 for welding is attached to the lower surface of the jig 5 via an insulator 71. The heater 7 is formed in a rectangular shape in conformity with the end shape of the casing 2, cords 72 and 73 for energization are connected to two opposing locations, and electricity is energized through both cords 72 and 73. As a result, the heater 7 itself is heated. Therefore, if the jig 5 is lowered while the heater 7 is heated, the rib 22 of the casing 2 and the peripheral wall 31 of the lid 3 are melted and welded to each other.

  As shown in this figure (b), the welded portion M between the rib 22 and the peripheral wall 31 is welded and then bent inward by the heater 7 which further descends, and falls into the groove portion 32. In this way, by at least inclining the ribs 22 inward, the ribs 22 are hidden behind the outer peripheral surface 21 subjected to the makeup treatment, and the welded portion M is prevented from being exposed to the outside.

  As shown in FIG. 3, the rib 22 is inwardly collapsed after welding. Even if this is left as it is, the welded portion is not conspicuous from the outside, but in order to prevent the rib 22 from being further exposed to the outside, as shown in FIG. You may make it fall in the groove part 32 side, and it may make it bend | fold in the direction substantially orthogonal to the outer peripheral surface 21. In the figure, reference numeral 81 is an insulator, and reference numerals 82 and 83 are energizing cords.

  Although the heater 7 and the heater 8 are used in FIGS. 3 and 4, respectively, the two have different sectional shapes, but the basic structures are the same. The structure of the heater 8 will be described as an example. As described above with reference to FIG. 5, the heater 8 is formed in a rectangular shape. The cross section of the heater main body 84, which generates heat when energized, and the electrodeposition layer 85 on which the diamond particles having extremely high thermal conductivity are electrodeposited are provided on the lower surface, and the surface of the electrodeposition layer 85 is made of fluororesin. It was coated with a coating layer 86.

  With this configuration, the heater body 84 generates heat when electricity is applied through the cords 82 and 83, and the heat energy generated by the heat flows to the lower surface through the diamond particles. Then, the rib 22 and the peripheral wall 31 are melted by the thermal energy, but a coating layer 86 made of a fluororesin is provided so that the melted resin does not adhere to the heater 8 side.

  Then, by making the heater main body 84 into a thin plate shape as described above, the heat capacity is reduced, and when the power supply is stopped, the heater body 84 is immediately cooled. Therefore, as described above, after the ribs 22 and the peripheral wall 31 are heated and shaped while the heater 8 (or the heater 7) is energized, the ribs 22 and the peripheral wall 31 are immediately cooled and hardened when the energization is stopped. At that time, the cooling rate may be increased by blowing air.

  By the way, in the above-mentioned embodiment, the long tubular casing is used as the casing 2, but other casings may be used. For example, as shown in FIG. 6, the present invention may be applied to a bottomed casing 9 having a relatively shallow bottom, which is used for a remote controller for a bathroom or the like.

  In this case, the outer peripheral surface 91 of the casing 9 is subjected to a makeup treatment, and a step for the outer peripheral surface 91 is provided, and a rib 92 for welding is provided inside. A peripheral wall 94 is formed on the outer circumference of the lid 93, and a groove 95 is formed inside the peripheral wall 94.

  Then, the rib 92 is tilted inward by 90 ° by the two steps shown in FIG. 4 and FIG. 5, the rib 92 and the peripheral wall 94 are completely housed in the groove portion 95, and the rib 92 becomes the lid 93. You may make it form the same surface.

  It should be noted that the present invention is not limited to the above-described embodiment, and various modifications may be made without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Lighting fixture 2 Casing 3 Lid body 5 Jig 7 Heater 8 Heater 9 Casing 21 Outer peripheral surface 22 Rib M Welding part

Claims (3)

  In a sealed structure of a casing in which a lid that closes the opening is welded to an annular rib that is erected on the peripheral wall of the opening formed in the resin casing body, the peripheral surface of the casing is visually resistant. A casing sealing structure, characterized in that a makeup treatment is applied, and the ribs are formed inside a predetermined distance from the peripheral surface.   The casing sealing structure according to claim 1, wherein the rib is curved inwardly in a state of being welded to the lid body.   The casing sealing structure according to claim 2, wherein a groove for accommodating the inwardly curved rib is formed in the lid body.

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