JP5977635B2 - Sealing structure of casing and method of manufacturing casing having sealing structure - Google Patents

Description

  The present invention relates to a housing sealing structure for ensuring airtightness and liquid tightness of a housing.

  For example, a housing of various control devices such as a switch for FA (factory automation) is generally composed of a housing body that houses an electronic device and a lid that closes the housing. In addition, when such a casing is used in an environment where liquid such as oil or water scatters, a sealing member such as packing is interposed between the casing main body and the lid body, so (Hereinafter referred to as “sealing” including gas tightness in this specification).

  As shown in FIG. 7 of Japanese Patent Application Laid-Open No. 2010-92694, a conventional casing sealing structure is configured to close a bathtub-shaped casing body 101 having an internal space 101a for accommodating an electronic device, and the internal space 101a. And a packing 103 provided on the mating surface 101b of the casing body 101. The internal space 101a of the housing main body 101 is a recess formed inside the housing main body 101, and the inner space 101a is surrounded by a side wall portion formed around the recess.

  As described above, the conventional casing body is a bathtub-shaped member having a side wall portion around the entire inner space. Therefore, in addition to a molding method using, for example, aluminum die casting, it is manufactured by blow molding or drawing. However, in these cases, the manufacturing cost of the mold becomes high. Further, when changing the length of the casing in the longitudinal direction, it is necessary to newly manufacture a mold, and in this case, the manufacturing cost of the mold further increases. On the other hand, it is conceivable to manufacture the casing body one by one by cutting, but in this case, although it can easily cope with a change in the length of the casing in the longitudinal direction, the manufacturing cost of the casing body is also increased. It will be.

  The present invention has been made in view of such a conventional situation, and a problem to be solved by the present invention is to reduce costs in a sealed structure of a housing. Further, the present invention is intended to improve the sealing performance of the casing while reducing the cost in the casing sealing structure including the casing main body that opens to the front surface, the rear surface, and the upper surface. Furthermore, the present invention is intended to improve workability at the time of assembling the internal parts while reducing the cost in the sealed structure of the housing.

To solve the above problems, the sealed structure of the housing according to the present invention is formed in a cylindrical shape toward the rear from the front surface, the upper surface and the upper surface of the window hole is opened with opposed vital internal components installed A housing body having a base surface, a lid that closes the opening of the window hole through the translucent plate and the first seal member, and second and third seals for the front and rear openings, respectively. A front side cover and a rear side cover that are closed via a member are provided . The first seal member includes a flat sheet portion on which the translucent plate is placed, and a standing wall portion that rises upward over the entire circumference of the outer peripheral edge of the sheet portion and positions the translucent plate in the front-rear and left-right directions. have. The lid body has a bent portion at a hanging portion that is suspended from the upper surface to the lower side, and the housing body has a receiving portion that is recessed from the front surface to the rear surface and receives the bent portion of the lid body. Yes. The casing urges the bent portion of the lid arranged in the receiving portion of the casing main body from the lower side of the bent portion to the side away from the opening of the window hole of the casing main body. A pressurizing unit that pressurizes the first seal member by directly pressurizing is further provided. The internal component includes at least one unit, and the unit can be installed from the outside of the housing through the window hole of the housing body (see claim 1).

According to the present invention, since the housing body is formed in a cylindrical shape from the front surface to the rear surface, it is not necessary to prepare both the upper die and the lower die as in die casting, and the die structure can be simplified, so that the cost can be reduced. Can be reduced. In the case where by extrusion, since the same cross-sectional shape in the extrusion direction of the material, by cutting the casing body which is extruded into appropriate any length, the longitudinal length of the housing Can be easily changed. In this case, when changing the length of the casing in the longitudinal direction, it is not necessary to newly manufacture a mold corresponding to the changed length, and the cost can be further reduced.

In addition, according to the present invention, the casing body is formed in a cylindrical shape from the front surface to the rear surface, and the window hole is formed in the upper surface, so that each opening on the front surface and the rear surface has the second and third openings. The front and rear covers can be reliably closed via the sealing member, and the opening of the upper surface window hole can be reliably closed by the lid via the first sealing member. Thereby, the sealing property of a housing can be improved.

  Furthermore, according to the present invention, since the window hole is formed in the upper surface of the housing body, when the internal part is assembled to the base surface of the housing body, the base surface can be directly accessed through the window hole on the upper surface. Therefore, workability when assembling internal parts can be improved. In addition, when a window hole is not formed in the upper surface of the chassis main body, when incorporating the internal parts into the interior of the chassis main body, the base plate on which the internal components are installed in advance is passed through the opening on the front surface or the rear surface of the chassis main body. It is necessary to insert the base plate into the housing body after the base plate is inserted, after being inserted into the housing body. However, in the present invention, it is not necessary to separately provide such a base plate, and the work of attaching the base plate is not necessary, so that the workability when assembling the internal parts can be improved.

Further, in the present invention, the first seal member rises upward over the entire circumference of the flat sheet portion on which the translucent plate is placed and the outer peripheral edge of the sheet portion, and moves the translucent plate in the front-rear and left-right directions. And the lid body has a bent portion that is suspended from the upper surface to the lower side, the housing body is recessed from the front surface to the rear surface, and the lid body The housing has a receiving portion for receiving the bent portion, and the casing is arranged so that the bent portion of the lid disposed in the receiving portion of the casing main body is moved away from the opening of the window hole of the casing main body from below the bent portion. A pressurizing unit that pressurizes the first sealing member by directly pressurizing the translucent plate with the lid by urging is further provided. Internal components includes at least one or more units, the unit that is enabled installed inside the housing from the outside of the housing through the window opening of the box body.

In this case, even when the long constituting the housing body in the longitudinal direction, in Rukoto box body is formed in a cylindrical shape toward the rear from the front, it can be reduced the cost of manufacture of the box body having a receiving portion . In addition, since at least one unit can be installed from the outside of the housing through the window hole on the upper surface, at least one unit can be installed from the outside of the housing through the front or rear opening of the housing body. The assembly cost of the product can be reduced compared with the case where it is installed inside.

In the present invention, a pair of standing wall portions that rise upward are formed on the left and right side edge portions of the upper surface of the housing body (see claim 2).

In the present invention, the sheet portion of the first seal member is provided with an elastic protrusion that protrudes from the sheet portion (see claim 3).

As described above, according to the present invention, since the casing body is formed in a cylindrical shape from the front surface to the rear surface, it is not necessary to prepare both the upper mold and the lower mold as in die casting, and the mold structure can be obtained. Since it can be simplified, the cost can be reduced . Teeth may, with formed in a cylindrical shape toward the rear of the housing body from the front, since the window opening in the upper surface so as to open formation, the openings of the front and rear surfaces via the second, third sealing member front In addition, since it can be reliably closed by the rear cover, and the opening of the window hole on the upper surface can be reliably closed by the lid through the first seal member, the sealing performance of the housing can be improved. Further, since the window hole is formed in the upper surface of the housing body, when installing the internal parts on the base surface of the housing body, the base surface can be directly accessed through the window holes on the upper surface. Workability at the time of assembly can be improved.

1 is an overall perspective view of an LED lighting device employing a casing having a sealed structure according to an embodiment of the present invention. It is a top view of LED lighting apparatus (FIG. 1). It is a front view of LED lighting apparatus (FIG. 1). It is a rear view of a LED lighting apparatus (FIG. 1). It is a front side view of an LED lighting device (FIG. 1). It is a rear surface side view of an LED lighting device (FIG. 1). It is a back side perspective view of a LED lighting device (FIG. 1). It is a back side perspective view of a LED lighting device (FIG. 1). FIG. 3 is a cross-sectional view taken along line IX-IX in FIG. 2. FIG. 3 is a cross-sectional view taken along line XX in FIG. 2. FIG. 2 is an exploded view of the LED lighting device (FIG. 1). FIG. 12 is an exploded view in a state in which internal components such as an electronic component and a reflector are omitted from FIG. 11, and are diagrams illustrating main components of the structure of the present embodiment. It is a figure which shows the state which abbreviate | omitted the internal component from FIG. FIG. 14 is an exploded view of the state where the lid and the mounting screw are omitted from FIG. 13. It is a figure which shows the housing main body of the state which abbreviate | omitted the internal component from FIG. It is a whole perspective view of the housing main body which comprises the structure of a present Example. It is a cross-sectional schematic diagram of the housing which has the sealing structure by the 1st modification of this invention. It is the cross-sectional schematic of the housing | casing which has the sealing structure by the 2nd modification of this invention. It is a cross-sectional schematic of the housing | casing which has the sealing structure by the 3rd modification of this invention. It is the cross-sectional schematic of the housing | casing which has the sealing structure by the 4th modification of this invention. It is a cross-sectional schematic diagram of the housing which has the sealing structure by the 5th modification of this invention.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIGS. 1 to 15 are views for explaining a casing having a sealed structure according to an embodiment of the present invention. Here, the sealed structure is applied to an LED (Light Emitting Diode) lighting device. Will be described as an example.

  1 to 8 show the appearance of an LED lighting device that employs the structure of this embodiment. As shown in these drawings, the housing 1 of the LED lighting device includes a housing body 2 disposed below, a lid 3 mounted on the housing body 2, and a front-rear direction of the housing body 2 (FIG. 2). Or a front cover 4 and a rear cover 5 mounted on end faces (that is, front and rear surfaces) in the left-right direction of FIG.

  As will be described later, the housing body 2 is a member on which a substrate on which LED light emitting elements and the like are mounted is installed, and a power supply current is supplied to the LED light emitting elements in the rear cover 5 attached to the rear end face. A lead wire 10 is connected. In addition, a plurality of heat radiation fins 20f are provided at the lower portion of the housing body 2. The casing body 2 is formed by an extrusion method using, for example, aluminum or resin. The extrusion direction of the material at the time of extrusion molding coincides with the front-rear direction of the casing body 2.

  The lid 3 is bent downward at the flat upper part 30 in which a window 30a for transmitting light emitted from the LED light emitting element to the outside of the apparatus is formed, and the left and right side edges of the upper part 30. It has the hanging parts 31 and 32 suspended. The lid 3 is configured by, for example, bending a SUS sheet metal. Moreover, the translucent board 35 arrange | positioned under the window part 30a is visible.

  As shown in FIGS. 9 and 10 which are sectional views taken along lines IX-IX and XX in FIG. 2 and FIG. 11 which is an exploded view of the apparatus, respectively, on the flat base surface 2A of the casing body 2 as shown in FIG. Is provided with a substrate 7 via a heat dissipation sheet 6. An electronic component including a plurality of LED light emitting elements 70 is mounted on the substrate 7, and the lead wire 10 is electrically connected to the substrate 7. A reflector unit 8 is provided above the substrate 7. The reflector unit 8 includes a plurality of reflector portions 80 each having a substantially mortar-like reflecting surface 80a for reflecting light emitted from each LED light emitting element 70 upward. Each reflector unit 80 is disposed on each corresponding LED light emitting element 70. On the reflector unit 8, the diffusion sheet 9 for diffusing the light reflected by each reflector unit 80 toward the outside of the apparatus is disposed. A translucent plate 35 is placed on the upper surface 20 of the housing body 2 via a packing 36. The translucent plate 35 is provided directly below the upper portion 30 of the lid 3.

  As shown in FIGS. 12 and 15, a plurality of screw holes 2 b are formed in the base surface 2 </ b> A of the housing body 2. In these screw holes 2b, mounting screws 72 for screwing and fixing the substrate 7 and the heat dissipation sheet 6 onto the base surface 2A are inserted (see FIG. 11). Also, as shown in FIGS. 12 to 15, a plurality of vertical through holes 2 c and a plurality of screw holes 2 d are formed on the left and right sides of the housing body 2. On the other hand, the hanging portions 31 and 32 of the lid 3 are respectively provided with bent portions 31 ′ and 32 ′ that are bent inward and extend along the upper portion 30. A plurality of screw holes 31 ′ a and a plurality of notches 31 ′ b are formed in the bent portion 31 ′. Similarly, a plurality of screw holes 32 ′ a and a plurality of screw holes 32 ′ a and a plurality of notches 31 ′ b are formed in the bent portion 32 ′. A notch (not shown) is formed.

  When the lid 3 is put on the casing body 2, the screw holes 31'a and 32'a of the lid 3 are aligned with the corresponding through holes 2c of the casing body 2 in the vertical direction. Each notch 31 ′ b of the body 3 is aligned with the corresponding screw hole 2 d of the housing body 2 in the vertical direction. A mounting screw (pressurizing means) 18 is inserted into each through hole 2c of the housing main body 2 from the lower surface side of the housing main body 2, and the screw portion of the mounting screw 18 is connected to each screw hole 31'a, 32'a of the lid 3. The lid 3 is screwed to the housing body 2 by being screwed onto the casing body 2 and the lid 3 is urged downward while the lid 3 is urged through the translucent plate 35 (that is, the translucent plate 3). The packing 36 is pressed and clamped between the casing body 2 and the plate 35 integrally with the lid 3. When the assembled device is attached to a desired attachment surface, a screw portion of an attachment bolt (not shown) through which the attachment surface is inserted is screwed into each screw hole 2d from the lower surface side of the housing body 2. By tightening, the device is attached to the mounting surface.

  As shown in FIGS. 12 to 15, the housing body 2 is formed in a cylindrical shape (in this example, a rectangular tube shape) from the front surface to the rear surface, and has a through hole 2 a extending in the front-rear direction. The bottom surface of the through hole 2a constitutes the base surface 2A. The housing body 2 has a flat upper surface 20 that is spaced upward from the base surface 2A and faces the base surface 2A, and the upper surface 20 constitutes the upper surface of the through hole 2a. The upper surface 20 of the housing body 2 is formed with a window hole 20a that penetrates the upper surface 20 in the vertical direction and extends in the front-rear direction. The window hole 20a is not opened on the front surface, the rear surface, and the left and right side surfaces of the housing body 2, and is formed so as to penetrate inside the outer peripheral shape of the upper surface 20.

  Since the window hole 20a does not open to the front surface, the rear surface, and the left and right side surfaces of the housing body 2, the shape of the mating surface with the packing 36 on the upper surface 20 of the housing body 2 is as shown in FIG. In this example, it has a plate frame-like planar shape over the entire circumference of the opening of the window hole 20a. Further, since the window hole 20a does not open to the front surface and the rear surface of the housing body 2, the shape of the mating surface with the packings 41 and 51 on the front surface and the rear surface of the housing body 2 is a through-hole as shown in FIG. 2a is continuous across the entire circumference of the opening (that is, in the vertical and horizontal directions), and in this example, it has a substantially plate-like planar shape over the entire circumference of the opening of the through hole 2a. Yes.

  The opening of the window hole 20 a in the upper surface 20 of the housing body 2 is closed with a light transmitting body 35 through a packing 36. The opening on the front side of the housing body 2 is closed by the front cover 4 via the packing 41. The front cover 4 and the packing 41 are fixed by screws to the mating surface of the opening on the front side of the housing body 2 with mounting screws 40. Similarly, the opening on the rear surface side of the housing body 2 is closed by the rear cover 5 via the packing 51. The rear cover 5 and the packing 51 are screwed and fixed to the mating surface of the opening on the rear surface side of the housing body 2 by means of mounting screws 50. Here, the packings 36, 41, 51 are made of, for example, nitrile rubber. However, the material constituting each packing 36, 41, 51 is not limited to this, and other materials are used. It may be a rubber of a kind or a material other than rubber (for example, resin).

  A through-hole 2e in the front-rear direction is formed on each mating surface of the opening on the front side and the rear side of the housing body 2. In these through holes 2e, mounting screws 40 are inserted from the front side, and mounting screws 50 are inserted from the rear side. In this case, if a tapping screw is used as the mounting screws 40 and 50, it is not necessary to thread the through hole 2e, and the manufacturing process can be simplified. Of course, the through hole 2e may be threaded so that a general mounting screw is screwed into the screw hole. As shown in FIGS. 13 to 14, the lower part of each through-hole 2e is partly cut out by a notch 2e ', and each through-hole 2e opens downward. As a result, chips generated when the tapping screw is screwed into each through-hole 2e are discharged downward through the notch 2e '. As a result, the generated chips are discharged to the front side and Intervention on each mating surface of the opening on the rear surface side can be prevented, and deterioration of the sealing performance of the packings 41 and 51 can be prevented.

  A pair of standing wall portions 21 extending in the front-rear direction while rising upward are formed on the left and right edges of the upper surface 20 of the housing body 2, and the packing 36 is placed on the upper surface 20 of the housing body 2 by these standing wall portions 21. Is positioned in the left-right direction (left-right direction in FIGS. 13 to 14). The packing 36 is a substantially plate-like sheet-like member. The flat sheet portion 36A has a window hole 36a formed therein, and the entire circumference (that is, the front-rear direction and the left-right direction) of the sheet portion 36A. A standing wall portion 36b rising upward is formed at the outer peripheral edge portion. When the packing 36 is placed on the upper surface 20 of the housing body 2, the packing 36 is attached to the housing body 2 via the standing wall portions 36 b in the left-right direction of the packing 36 and the standing wall portions 21 of the upper surface 20 of the housing body 2. Is positioned in the left-right direction on the upper surface 20. Further, when the translucent plate 35 is placed on the sheet portion 36 </ b> A of the packing 36, the translucent plate 35 is moved back and forth on the seat portion 36 </ b> A of the packing 36 via the standing wall portion 36 b at the outer peripheral edge of the packing 36. Is positioned in the horizontal direction.

  The sheet portion 36A of the packing 36 is provided with elastic protrusions 36p and 36p ′ that extend slightly without any break over the entire circumference (that is, the front-rear direction and the left-right direction) of the sheet portion 36A while slightly protruding upward and downward. (See FIG. 13A).

  The elastic protrusion 36p is configured to be elastically compressed and deformed when being pressed by the light transmitting plate 35 when the lid 3 is mounted, whereby the packing 36 is formed on the lower surface 35a of the light transmitting plate 35. It comes to adhere closely. The elastic ridge 36p extends in a substantially rectangular shape along the outer peripheral edge of the packing 36. The elastic protrusion 36p ′ is configured to be elastically compressed and deformed when being pressed by the upper surface 20 of the housing body 2 when the lid 3 is mounted. It comes to adhere to. The elastic protrusion 36p 'extends in a substantially rectangular shape, like the elastic protrusion 36p. These elastic protrusions 36p and 36p 'are not essential parts of the packing 36. However, the presence of these elastic protrusions 36p and 36p' can improve the sealing performance of the packing 36.

  As described above, the casing body 2 is molded by, for example, an extrusion molding process of an aluminum material or a resin material. In the extrusion molding, the x direction in FIG. 15 is the material extrusion direction. For this reason, each of the through hole 2a, each heat dissipating fin 20f, each standing wall portion 21, each through hole 2e, each notch portion 2e 'and each receiving portion 2D of the housing body 2 extends along the x direction of the extrusion direction. Yes.

  When manufacturing the above-described casing main body 2, first, the casing main body 2 is formed into a cylindrical shape by an extrusion molding method. Next, the casing main body 2 formed into a cylindrical shape is cut into a predetermined length. Next, an additional process of penetrating and forming the window hole 20a in the upper surface 20 of the cut body 2 is performed. In addition, a plurality of screw holes 2b are additionally machined in the base surface 2A of the chassis body 2, and a plurality of through holes 2c and screw holes 2d are additionally machined in the left and right sides of the chassis body 2. Then, surface treatment such as alumite or shot blasting is performed as necessary. In this way, the housing body 2 is obtained.

  When assembling the above-described sealed casing 1 using the casing body 2 obtained by the extrusion method, first, the substrate 7 on which electronic components including the LED light emitting elements 70 are mounted is attached to the heat dissipation sheet 6. The base plate 2 is placed on the base surface 2A of the housing body 2 and fixed to the base surface 2A together with the heat-dissipating sheet 6 by means of mounting screws 72 (see FIG. 11).

  Next, the opening on the front side of the housing body 2 is closed by the front cover 4 via the packing 41, and the front cover 4 and the packing 41 are attached to the mating surface of the opening on the front side of the housing body 2 by the mounting screws 40. Secure with screws. Similarly, the opening on the rear surface side of the housing body 2 is closed by the rear cover 5 through the packing 51, and the rear cover 5 and the packing 51 are aligned with the opening on the rear surface side of the housing body 2 by the mounting screw 50. Secure to the surface with screws. In addition, the lead wire 10 is connected to the rear cover 5, and the leading end of the lead wire 10 is introduced into the housing body 2 through the introduction hole formed in the packing 51 to be electrically connected to the substrate 7. . In addition, adjacent boards 7 are electrically connected by a connector 71.

  Next, the reflector unit 8 is placed on the substrate 7, and the diffusion sheet 9 is placed thereon. And the packing 36 is arrange | positioned on the upper surface 20 of the housing main body 2 (refer FIG. 11). At this time, the packing 36 is positioned in the left-right direction by the left and right standing wall portions 21 on the upper surface 20 of the housing body 2. From this state, the translucent plate 35 is placed on the sheet portion 36 </ b> A of the packing 36. At this time, the translucent plate 35 is positioned in the front-rear direction and the left-right direction by the standing wall portion 36b of the outer peripheral edge portion of the packing 36 (see FIGS. 9, 10, and 13). Here, an example is shown in which two reflector units 8 and two substrates 7 are provided. However, the number of reflector units 8 and the substrates 7 may be one, or three or more. One reflector unit 8 and one substrate 7 constitute one unit as a light source component.

  Next, the bent portions 31 ′ and 32 ′ of the lid 3 are placed on receiving portions (in this case, recessed portions that are recessed from the front side to the rear side) 2D provided on both sides of the housing body 2 from the front side to the rear side. By inserting, the cover 3 is put on the translucent plate 35 (see FIG. 11). At this time, the screw holes 31'a and 32'a of the lid 3 are aligned with the corresponding through holes 2c of the housing body 2 (see FIG. 9). From this state, the lid 3 is tightened by screwing the mounting screws 18 inserted into the through holes 2c from below the housing body 2 into the corresponding screw holes 31'a, 32'a of the lid 3. Is fixed to the housing body 2 with screws.

  In the state where each mounting screw 18 is tightened, the upper portion 30 of the lid 3 is urged downward to press the translucent plate 35 downward, and the lower surface 35a of the translucent plate 35 and the upper surface of the casing body 2 20, the packing 36 is pressed and clamped (see FIGS. 9 and 10). As a result, the opening of the window hole 20a in the upper surface 20 of the housing body 2 is sealed (see FIG. 13). The upper portion 30 of the lid 3 is formed with a pair of ribs 30b that protrude slightly upward and extend between the bent portions 31 and 32 (see FIG. 1). When the upper part 30 of the lid 3 is urged downward by the tightening of the upper part 18, bending deformation of the upper part 30 is prevented. In this way, the housing 1 is assembled (see FIGS. 1 to 8).

  Next, when attaching the housing 1 assembled as described above to an attachment surface (not shown), the screw portion of an attachment bolt (not shown) inserted through the attachment surface is used as the lower surface of the housing body 2. Then, the housing 1 is attached to the attachment surface by being screwed into the respective screw holes 2d of the housing body 2 and tightening.

  According to such a present embodiment, since the casing body 2 is formed by extrusion molding, it is not necessary to prepare both an upper mold and a lower mold such as die casting, and the mold structure can be simplified. Cost can be reduced. Further, in the case of extrusion molding, the same cross-sectional shape is obtained in the material extrusion direction. Therefore, the longitudinal length of the casing can be easily reduced by appropriately cutting the extruded casing body to an arbitrary length. Can change. In this case, when changing the length of the casing in the longitudinal direction, it is not necessary to newly manufacture a mold corresponding to the changed length, and the cost can be further reduced.

  In addition, according to the present embodiment, the casing body 2 is formed in a cylindrical shape from the front surface to the rear surface, and the window hole 20a is formed in the upper surface 20, so that each opening on the front surface and the rear surface has a packing. The front and rear covers 4, 5 can be reliably closed via 41, 51, and the opening of the window hole 20 a on the upper surface 20 can be reliably closed by the translucent plate 35 via the packing 36. Thereby, the sealing property of the housing 1 can be improved.

  Furthermore, according to the present embodiment, the window hole 20a is formed in the upper surface 20 of the housing body 2, so that when assembling the internal parts on the base surface 2A of the housing body 2, the window hole 20a on the upper surface 20 is assembled. Since the base surface 2A can be directly accessed through, the workability when assembling the internal parts can be improved. In addition, when the window hole 20a is not formed in the upper surface 20 of the housing body 2, when the internal component is incorporated into the housing body 2, the base plate on which the internal component is previously installed is attached to the front surface of the housing body 2 or It is necessary to insert the base plate into the housing main body 2 after the base plate is inserted while inserting the base plate into the housing main body 2 through the opening on the rear surface. However, in this embodiment, it is not necessary to separately provide such a base plate, and the work of attaching the base plate is not required, so that the workability when assembling the internal parts can be improved. Further, since the window hole 20a is formed in the upper surface 20 of the housing body 2, an operator can access the internal parts using the window hole during maintenance work of the apparatus.

  In the present embodiment, since the upper surface 20 of the housing body 2 has a continuous mating surface over the entire circumference of the opening of the window hole 20 a, the opening of the window hole 20 a on the upper surface 20 is transparent through the packing 36. The optical plate 35 can be reliably closed, whereby the sealing performance of the housing 1 can be improved.

  In the present embodiment, since the front and rear surfaces of the housing body 2 have unbroken mating surfaces over the entire circumference of each opening, the front and rear openings are connected to the front and rear via packings 41 and 51, respectively. The side covers 4 and 5 can be reliably closed, whereby the sealing performance of the housing 1 can be improved.

  In the present embodiment, the sheet portion 36A of the packing 36 has elastic protrusions 36p and 36p ′ on the contact side with the lower surface 35a of the translucent plate 35 and the upper surface 20 of the housing body 2, respectively. When the sheet portion 36A of the packing 36 is pressed and clamped between the lower surface 35a of the translucent plate 35 and the upper surface 20 of the casing body 2, the elastic protrusions 36p and 36p ′ of the packing 36 are elastically compressed and deformed, respectively. The packing 36 can be closely attached to the translucent plate 35 and the casing main body 2 without any gap, thereby improving the sealing performance as the casing.

  In the above embodiment, the packing 36 is formed in a plate frame shape, and the packings 41 and 51 are formed in a rectangular plate shape. However, each packing 36, 41, 51 has a shape other than these. It may be.

  In the said Example, the example which provided elastic protrusion part 36p, 36p 'in both the contact side with the translucent board 35 in the sheet | seat part 36A of the packing 36, and the contact side with the upper surface 20 of the housing body 2 is shown. However, it is also possible to omit one (or both) of these elastic protrusions 36p and 36p ′.

  In the above embodiment, the packing 36 is pressed and clamped between the lid 3 and the casing body 2 by urging the lid 3 downward using the mounting screw 18 inserted from below the casing body 2. However, application of the present invention is not limited to this. 16 to 20 show first to fifth modifications of the present invention, respectively. In these drawings, the same reference numerals as those in the previous embodiment denote the same or corresponding parts. Each figure shows the cross-sectional shape of the housing in a state where the internal parts are omitted (however, the right side portion is omitted from the center line), and corresponds to FIG. 13 of the above embodiment.

[First Modification]
In the first modification shown in FIG. 16, the housing body 2 ′ has a flange portion 25 projecting outward, and a screw hole 2 ′ c is formed in the flange portion 25. A screw portion of a mounting screw 18 ′ that is inserted through the lid 3 ′ from above is screwed into the screw hole 2′c. Further, a translucent plate 35 ′ and a packing 36 ′ are interposed between the upper portion 30 ′ of the lid 3 ′ and the flange portion 25 of the housing body 2 ′. When the mounting screw 18 ′ is tightened, the translucent plate 35 ′ and the packing 36 ′ are pressed and sandwiched between the upper part 30 ′ of the lid 3 ′ and the flange portion 25 of the casing main body 2 ′. Airtightness is maintained. In FIG. 16, an internal space S for accommodating internal components is formed by the base surface 2′A of the housing body 2 ′, the inner wall surface of the through hole 2′a, and the lower surface of the upper surface 20 ″.

[Second Modification]
In the second modified example shown in FIG. 17, as in the first modified example, the housing body 2 ′ has a flange portion 25 projecting outward, and a screw hole 2 ′ c is formed in the flange portion 25. Is formed. A translucent plate 35 ′ and a packing 36 ′ are interposed between the upper part 30 ′ of the lid 3 ′ and the flange portion 25 of the housing body 2 ′, and mounting screws for inserting the lid 3 ′ from above. 18 'penetrates translucent board 35' and packing 36 ', and the screw part is screwing into screw hole 2'c. When the mounting screw 18 ′ is tightened, the translucent plate 35 ′ and the packing 36 ′ are pressed and sandwiched between the upper part 30 ′ of the lid 3 ′ and the flange portion 25 of the casing main body 2 ′. Airtightness is maintained. In FIG. 17 as well, in the same manner as in the first modification, the internal parts are accommodated by the base surface 2′A of the housing body 2 ′, the inner wall surface of the through hole 2′a, and the lower surface of the upper surface 20 ″. Internal space S is formed.

[Third Modification]
In the third modified example shown in FIG. 18, similarly to the first modified example, the housing body 2 ′ has a flange portion 25 that projects outward. A translucent plate 35 ′ and a packing 36 ′ are interposed between the upper portion 30 ′ of the lid 3 ′ and the flange portion 25 of the housing body 2 ′. A screw hole 31 "a is formed in the inner bent portion 31" of the lid 3 '. The screw portion of the mounting screw 18 ′ is screwed into the screw hole 31 ″ a from below, and the tip of the screw portion is in contact with the lower surface of the flange portion 25 of the housing body 2 ′. When the mounting screw 18 ′ is tightened. The translucent plate 35 ′ and the packing 36 ′ are pressed and clamped between the upper portion 30 ′ of the lid 3 ′ and the flange portion 25 of the casing body 2 ′, so that the sealing performance of the casing 1 ′ is maintained. In FIG. 18 as well, in the same manner as in the first modification, the internal parts are accommodated by the base surface 2′A of the housing body 2 ′, the inner wall surface of the through hole 2′a, and the lower surface of the upper surface 20 ″. Internal space S is formed.

[Fourth Modification]
In the fourth modification shown in FIG. 19, a screw hole 2'c is formed in the lower part of the housing body 2 ', and the mounting screw 18' is screwed into the screw hole 2'c from below. A washer (or packing) 37 with a seal is attached to the mounting screw 18 ′. A plate 38 is provided at the tip of the screw portion of the mounting screw 18 ', and a translucent plate 35' and a packing 36 'are interposed between the plate 38 and the upper surface 20' of the housing body 2 '. . When the mounting screw 18 ′ is tightened, the translucent plate 35 ′ and the packing 36 ′ are pressed and clamped between the plate 38 and the upper surface 20 ′ of the housing body 2 ′, so that the sealing performance of the housing 1 ′ is maintained. . An internal space S for accommodating internal components is formed by the base surface 2′A of the housing body 2 ′, the inner wall surface of the through hole 2′a, and the lower surface 35′a of the light transmitting plate 35 ′.

[Fifth Modification]
In the fifth modification shown in FIG. 20, a screw hole 2'c is formed in the upper surface 20 'of the housing body 2', and the mounting screw 18 'is screwed into the screw hole 2'c from above. . A plate 38 is provided at the tip of the screw portion of the mounting screw 18 ', and a translucent plate 35' and a packing 36 'are interposed between the plate 38 and the lower portion of the housing body 2'. When the mounting screw 18 ′ is tightened, the translucent plate 35 ′ and the packing 36 ′ are pressed and clamped between the plate 38 and the lower portion of the housing body 2 ′, so that the sealing performance of the housing 1 ′ is maintained. An internal space S for accommodating internal components is formed by the base surface 2′A of the housing body 2 ′, the inner wall surface of the through hole 2′a, and the lower surface 35′a of the light transmitting plate 35 ′.

  In the embodiment and the first to fifth modifications, the example in which the casing having the sealing structure according to the present invention is applied to the LED lighting device is shown, but the application of the present invention is not limited to this. The present invention can also be applied to an LED display device that performs various displays using LEDs housed in the housing. Moreover, it is applicable also to the illumination or display apparatus using light-emitting devices other than LED (for example, EL (Electro Luminescence)) and fluorescent lamps. Further, the present invention can be similarly applied to other various control devices that do not have an illumination function and a display function and that simply require a sealed structure. In this case, the light-transmitting plate is not required, the window portion of the lid is not required, and the lower surface of the lid directly presses the seal portion. Even in this case, since the window hole is formed in the upper surface of the housing body, the base surface can be directly accessed through the window hole when the internal part is assembled. There is no change in the point that workability at the time of attaching can be improved.

  The present invention is suitable for various control equipment enclosures that require airtightness and liquid-tightness in the field of FA (factory automation), for example.

1: Housing

2: Body 2A: Base surface 20: Upper surface 20a: Window hole

3: Lid 31, 32: Hanging part 31 ', 32': Bending part 35: Translucent plate 36: Packing (first seal member)

4: Front cover 41: Packing (second seal member)

5: Rear cover 51: Packing (third seal member)

JP 2010-92694 A (see FIG. 7)

Claims (3)

It is a sealed structure of a housing for accommodating internal parts,
Is formed in a cylindrical shape toward the rear from the front, the upper surface a window hole is opened and formed, a housing body having a base surface which upper surface facing vital the internal components are installed,
A lid that closes the opening of the window hole via the light- transmitting plate and the first seal member;
The front and the openings of the respective second of the rear surface, and a front and rear cover closing via a third seal member,
The first seal member rises upward over the entire circumference of the flat sheet portion on which the translucent plate is placed and the outer peripheral edge of the sheet portion, and positions the translucent plate in the front-rear and left-right directions. And a standing wall portion
The lid body has a bent portion in a hanging portion that hangs downward from the upper surface thereof, and the housing body is recessed from the front surface to the rear surface and receives the bent portion of the lid body. Has a receiving part,
The casing urges the bent portion of the lid disposed in the receiving portion of the casing main body from below the bent portion toward the side away from the opening of the window hole of the casing main body. And further comprising pressurizing means for pressurizing the first sealing member by directly pressurizing the translucent plate with the lid,
The internal component includes at least one unit, and the unit can be installed inside the housing from the outside of the housing via the window hole of the housing body.
An enclosure sealing structure characterized by that . In claim 1,
A pair of standing wall portions that rise upward are formed on the left and right side edge portions of the upper surface of the casing body.
An enclosure sealing structure characterized by that. In claim 1,
The seat portion of the first seal member is provided with an elastic protrusion that protrudes from the seat portion.
An enclosure sealing structure characterized by that.

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