JP2012079556A - Sealed structure container and sealed structure electric equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sealed structure container capable of reducing thickness in the vicinity of a window and the number of fixing screws and reducing cost and facilitating assembling work, while raising freedom of design and miniaturization.SOLUTION: The sealed structure container 100 includes a window section 11 covered with a rectangular glass plate 3 in the front 1A, holding sections 13, and fastening tools 4. Each holding section 13 has a groove section 14 wherein an opening with an opening width equal to the thickness of the glass plate 3 crosses at right angles the front and at least one end in a longitudinal direction is opened in a side direction, and the openings of the groove sections 14 are respectively formed in one body at two locations holding the window section 11 in the front 1A so as to make the openings face each other. The holding section 13 is shorter than the glass plate 3 in a longitudinal direction, and is longer than the window section 11 in the longitudinal direction. The fastening tools 4 are respectively mounted on both ends of the holding section 13 in the front 1A, and cover portions exposed from the holding sections 13 on the glass plate 3 inserted into the groove sections 14 from one end.

Description

  The present invention relates to a hermetically sealed container that houses a device that exchanges light with the outside, such as a lighting device and a photoelectric switch, and a hermetically sealed electric apparatus having the container.

  There is an explosion-proof lighting device as a sealed structure electrical device in which a device is housed in a sealed structure container. Explosion-proof lighting devices are used when lighting is required during work in dark places or at night in hazardous areas with flammable gas atmosphere such as petrochemical plants. It is stored in an explosion-proof container (for example, see Patent Document 1).

  An explosion-proof container used for an explosion-proof illumination device includes a window part partially covered with a glass plate in order to irradiate light from a light source housed inside. The explosion-proof container needs to seal between the periphery of the window and the periphery of the glass plate so that the flame generated inside the casing is not exposed to the outside via the periphery of the glass plate.

  For this reason, in some conventional explosion-proof containers for lighting devices, a stepped portion 121 is formed around the window 120 on the front surface of the housing 110 as shown in FIG. After the glass plate 130 and the packing 160 are inserted into the step portion 121 from the outside and fixed to the step portion 121 with a fixing material, the glass pressing plate 140 is fixed around the window portion 120 of the housing 110 with a plurality of fixing screws. The explosion-proof structure is maintained by pressing the periphery of the glass plate 130 against the step portion 121 with the glass holding plate 140.

JP 11-053929 A

  However, the conventional sealed structure container is configured to sandwich the entire circumference of the glass plate between the two members of the container and the glass pressing plate, and in order to ensure the strength of the container, the surroundings of the window portion including the glass pressing plate. The cost increases due to the increase in thickness and the number of fixing screws, and the assembly work becomes complicated. In addition, it is necessary to form a plurality of female screw portions into which the plurality of screws are screwed around the window portion, which increases design restrictions and increases the size of the container.

  An object of the present invention is to hold a light-transmitting plate member with a member formed integrally with a container, thereby reducing the thickness around the window and the number of fixing screws, reducing the cost, and An object of the present invention is to provide a hermetically sealed container and a hermetically sealed electrical device that can facilitate assembly work, increase the degree of freedom in design, and realize downsizing.

  A hermetically sealed container according to the present invention accommodates a device for exchanging light with the outside, has a window portion covered with a translucent plate on the front surface, and includes a holding portion and a fastener. . The holding part has a groove part in which an opening part having an opening width equal to the thickness of the translucent plate material is perpendicular to the front face and at least one end in the longitudinal direction is open in the side surface direction, and the opening parts face each other. Thus, it is integrally formed at each of the two positions sandwiching the window portion on the front. The holding part is shorter than the translucent plate material in the longitudinal direction and longer than the window part. The fastener is attached to each of both end portions of the holding portion on the front surface, and covers a portion exposed from the holding portion in the translucent plate material inserted into the groove portion from one end.

  With this configuration, two holding portions are erected in parallel on the front surface on which the window portion is formed with the window portion interposed therebetween. Each of the two holding portions includes a groove portion in which the opening portion is orthogonal to the front surface and the opening portions face each other. In the groove portion, the opening width of the opening portion is equal to the thickness of the translucent plate material, and at least one end in the longitudinal direction of the groove portion is open in the side surface direction. For this reason, a translucent board | plate material can be inserted in a groove part from the end of a groove part, and is hold | maintained by a holding | maintenance part. The portions of the translucent plate material exposed at both ends of the holding portion are covered with the fasteners, and the holding state by the holding portion is maintained.

  In this configuration, a groove side gap is formed between the groove portion and the translucent plate material in a direction orthogonal to the longitudinal direction, and the fastener portion is formed between the groove portion side and the light transmissive plate material in the longitudinal direction. It is preferable to form a fastener side gap communicating with the gap. By filling the groove side gap and the fastener side gap with the adhesive, the periphery of the translucent plate material can be sealed.

  Moreover, it is preferable to open a window part in the extrusion material which exhibits a uniform cross section along the direction parallel to the front. A holding portion having a groove portion whose opening is orthogonal to the front surface can be easily formed integrally with the front surface of the sealed structure container.

  According to the present invention, the translucent plate material can be held by the groove portion of the holding portion integrally formed on the front surface, and the cost can be reduced by reducing the thickness around the window portion and the number of fixing screws. In addition, the assembly work can be facilitated, the degree of freedom in design can be increased, and the size can be reduced.

It is an assembly drawing of the airtight structure container which concerns on embodiment of this invention. It is side surface sectional drawing of the sealed structure container. It is the front view and sectional drawing of the fastener used for the said airtight structure container. It is sectional drawing of the principal part of the sealed structure container. It is an assembly drawing of the conventional sealed structure container.

  Hereinafter, a sealed structure container according to an embodiment of the present invention will be described with reference to the drawings. Here, an explosion-proof device that functions as a lighting device will be described as an application example of the present invention.

  As shown in FIG. 1, the sealed structure container 100 includes a main body 1, a lid 2, a glass plate 3, a fastener 4, and a packing 5. The main body 1 is a housing having a rectangular window portion 11 on the front surface (upward in FIG. 1) 1A and oval openings 12 on both side surfaces 1B and 1C, and houses electrical components therein. To do.

  In the front surface 1 </ b> A of the main body 1, holding portions 13 are integrally formed at two parallel positions sandwiching the window portion 11. The holding part 13 constitutes a groove part 14 whose opening surface is orthogonal to the front surface 1A. The two holding portions 13 are arranged with the opening surfaces of the groove portions 14 facing each other. Both ends of the groove portion 14 are open.

  The lid 2 is fixed to each of the side surfaces 1 </ b> B and 1 </ b> C of the main body 1 and closes the opening 12. A pull-in portion 21 is formed in the main body 2. The lead-in part 21 shields the inside of the main body 1 from the outside in a state where the power supply line and the signal line for the light source and the electrical component are inserted.

  The glass plate 3 is a rectangular tempered glass having a larger area than the window portion 11, and is disposed on the holding portion front surface 1 </ b> A to cover the window portion 11. The long side of the glass plate 3 is longer than the holding part 13. A packing 6 is attached to the peripheral edge of the outer surface of the glass plate 3. In addition, the glass plate 3 should just be a translucent board | plate material, for example, may be a transparent resin board.

  The fasteners 4 are attached to the front surface 1 </ b> A via two fixing screws outside the both ends of the holding portion 13. The fixing screw is screwed into the screw hole 15 of the main body 1. The fastener 4 covers a portion of the glass plate 3 exposed from both ends of the holding portion 13.

  The packing 5 is an annular body having elasticity, and is disposed between the glass plate 3 and the peripheral edge portion of the window portion 11.

  As shown in FIG. 2, the opening width of the opening surface of the groove 14 is substantially equal to the thickness of the glass plate 3. The groove portion 14 is open at both end portions in the longitudinal direction in the side surface direction. Therefore, the glass plate 3 can be inserted into the groove portions 14 of the two holding portions 13 from one end of the groove portion 14 along the longitudinal direction of the groove portion 14 in parallel with the front surface 1A.

  A concave portion 32 into which the packing 5 is fitted is formed at the peripheral edge portion of the window portion 11 in the front surface 1A. When the fastener 4 is attached to the front surface 1A in a state where the glass plate 3 is disposed at an appropriate position on the front surface 1A, the movement of the glass plate 3 in the longitudinal direction of the groove portion 14 is restricted, and the appropriate position on the front surface 1A of the glass plate 3 is determined. Can be fixed to.

  By inserting the glass plate 3 into the respective groove portions 14 of the two holding portions 13, the long side portion of the glass plate 3 is held by the holding portion 13 formed integrally with the front surface 1 </ b> A of the main body 1. In order to fix the glass plate 3 to the main body 1 while securing a sufficient internal pressure strength, it is not necessary to use a presser plate separate from the main body 1. Therefore, since the strength of the container can be easily secured, the thickness around the window can be reduced, and a number of fixing screws for fixing the presser plate to the main body 1 can be omitted. As a result, the cost can be reduced, the assembling work can be simplified, and the apparatus can be downsized.

  The main body 1 can be obtained by forming the window portion 11 and the like by cutting using an extruded material formed by extrusion using a die having a cross-sectional shape shown in FIG. The main body 1 including the holding portion 13 having the groove portion 14 can be easily formed.

  Inside the main body 1, a light source mounting substrate 21 and a drive circuit substrate 22 as devices of the present invention are incorporated. The light source mounting substrate 21 is a rectangular substrate, and a plurality of LEDs 21A arranged in two rows are mounted on the upper surface. The drive circuit board 22 is also a rectangular board, and an electrical component (not shown) for driving the LED 21A is mounted thereon. Light emitted from the LED 21 </ b> A is distributed to the outside through the glass plate 3.

  As shown in FIGS. 3 and 4, the fastener 4 is formed with two fixing through holes 41 and two adhesive filler communication holes 42. A fixing screw that is screwed into the screw hole 15 of the front surface 1A passes through the through hole 41. The communication hole 42 communicates with the groove 16 formed in the front surface 1A in a state where the fastener 4 is mounted on the front surface 1A. The groove 16 is opposed to a portion located outside the window portion 11 on the inner surface of the glass plate 3 arranged at a predetermined position on the front surface 1A. The groove 16 communicates with the groove portion 14.

  As shown in FIG. 2, a gap 14 </ b> A is formed between the groove 14 and the glass plate 3 in a direction parallel to the plane 1 </ b> A in a state where the glass plate 3 is maintained in the holding portion 13.

  When the adhesive is introduced and introduced from any one of the communication holes 42, the adhesive reaches the gap 14 </ b> A from the communication hole 42 through the groove 16. If the introduction of the adhesive is continued until the adhesive is exposed from the communication holes 42 other than the communication holes 42 into which the adhesive has been introduced, all the communication holes 42, the grooves 16 and the gaps 14A are filled with the adhesive. As a result, the glass plate 3 can be securely fixed at a predetermined position on the front surface 1A, and an explosion-proof structure can be established.

  The above description of the embodiment is to be considered in all respects as illustrative and not restrictive. The scope of the present invention is shown not by the above embodiments but by the claims. Furthermore, the scope of the present invention is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.

  For example, the device housed in the main body 1 may be any device that exchanges light with the outside, such as a photoelectric switch having a light receiving element that detects external light in addition to a light source such as an LED 21A or a cold cathode tube. It may be.

  Moreover, although the container 100 demonstrated the container of the explosion-proof structure as an example of the sealing structure of a container, the other sealing structure may be sufficient. Further, the sealed electrical apparatus is not limited to one that functions as an explosion-proof device or a lighting device, and may function as a photoelectric switch, for example.

1-main body 2-lid body 3-glass plate (translucent plate material)
4-fastener 5-packing 11-window 13-holding 14-groove 100-sealed container

Claims (4)

It is a sealed structure container that houses a device that exchanges light with the outside, and has a window portion covered with a light-transmitting plate material on the front,
At each of the two positions across the window on the front, an opening having an opening width equal to the thickness of the translucent plate is a groove perpendicular to the front and at least one end in the longitudinal direction is open in the lateral direction. A holding portion having a groove portion formed integrally with the openings facing each other;
The holding part is shorter than the translucent plate material in the longitudinal direction and longer than the window part,
A fastener that is attached to each of both end portions of the holding portion on the front surface, and covers a portion exposed from the holding portion in the translucent plate material that is inserted into the groove portion from the one end. Sealed structure container. The groove part forms a groove part side gap with the translucent plate material in a direction orthogonal to the longitudinal direction,
The sealed structure container according to claim 1, wherein the fastener forms a fastener-side gap communicating with the groove-side gap between the light-transmitting plate member in the longitudinal direction.   The sealed structure container according to claim 1 or 2, wherein the window portion is formed in an extruded material having a uniform cross section along a direction parallel to the front surface.   A sealed structure electrical apparatus comprising: the sealed structure container according to any one of claims 1 to 3; and a device that exchanges light with the outside and is housed in the sealed structure container.

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