JP2006222123A - Electric appliance cabinet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric appliance cabinet capable of ensuring strength for the impulse of the electric appliance cabinet without providing ribs, and facilitating miniaturization and compaction by ensuring a wide inner space by omitting the ribs. <P>SOLUTION: Concave portions 34, 44 and engaging pieces 35, 45 are alternately serially arranged and formed on the inner portions of a thickness direction of side walls 31, 41 of a cabinet body 30 and a cover 40, and the engaging pieces 35, 45 are fitted with the concave portions 34, 44. In fitting portions M1, M2 between the engaging pieces 35, 45 and the concave portions 34, 44, the end edges of the engaging portions 35, 45 are engaged with stepped surfaces 34a, 44a on both the concave portions 34, 44. An electric component T is inserted in an opening 42 of the side wall 41 of the cover 40. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electrical equipment cabinet, and more particularly to an electrical equipment cabinet that takes measures to secure strength against impulses in the front, rear, left, and right and up and down directions while ensuring a wide internal space.

  A conventional structure adopted when a box-shaped electric equipment cabinet made of a resin molded body is formed by combining a cabinet body and a cover will be described with reference to FIG. FIG. 8 is a cross-sectional view of a main part of a conventional electric equipment cabinet, and ribs 12 are arranged at a plurality of positions inside the side wall 11 of the cabinet body 1 made of a resin molded body at predetermined intervals. On the other hand, the projecting piece 22 is provided on the side wall 21 of the cover 2 made of a resin molded body, and when the cabinet body 1 and the cover 2 are combined, the end surfaces 13 and 23 of the side walls 11 and 21 of the both are connected to each other. Are projected and overlapped with each other, and the projecting piece 22 on the cover 2 side is inserted into the gap 14 formed at each upper end portion of the plurality of ribs 12 on the cabinet body 1 side.

  According to the electrical equipment cabinet having this structure, the protrusion 22 is inserted into the gap 14, so that the inward impulse (inward load) F applied to the side walls 11, 21 of both and the opposite direction (outward) ) Against the impulse (outward load), and against the load in the vertical direction, the end faces 13 and 22 of both side walls 11 and 21 are pressed against each other. It is relatively easy to ensure the necessary strength against the load in the direction.

  Further, in an electrical equipment cabinet having the structure described with reference to FIG. 8, in order to insert the protruding piece 22 on the cover 2 side into the gap 14 on the cabinet main body 1 side in the assembling process, from above the cabinet main body 1. Since it is necessary to push down the cover 2 as shown by the arrow A, the electrical component T mounted on the cabinet body 1 side is located above the side wall 11 of the cabinet body 1 and is shown on the side wall 11 as shown by the phantom line in FIG. In the case of protruding outward, it is impossible to assemble the structure shown in FIG. Therefore, in this case, as shown in FIG. 9, a large hollow-shaped opening 24 is formed in the side wall of the cover 2, and the cover 2 is attached to the cabinet body 1 so that the electrical component T is accommodated in the opening 24. After the adjustment, the panel 26 having the opening 25 for projecting the electric component T is attached to the position where the opening 24 is formed.

On the other hand, an opening / closing lid mounting device for an electronic device in which a hole on the opening / closing lid side is fitted to a protruding shaft on the case side in order to attach the opening / closing lid to the opening of the case of the electronic device (see Patent Document 1), When attaching the back cover to the cabinet, the hole of the back cover is inserted into the engaged portion of the arrow shape provided on the cabinet side, and the engaging claw inserted into the hole is engaged with the engaged portion. The back cover mounting structure (see Patent Document 2) in which the cover is pressed against the cabinet with a lid integrated with the fitting claw, and the catch member fixed to the frame is detachably engaged with the claw provided on the cover A cover attaching / detaching mechanism (see Patent Document 3) has been proposed.
JP-A-6-302975 Japanese Utility Model Publication No. 4-50988 JP-A-10-93260

  However, in the electrical equipment cabinet having the structure of FIG. 8, there is a measure for preventing the protruding piece 22 from being displaced in the direction in which the ribs 12 are arranged at the insertion portion itself with respect to the gap 24 of the protruding piece 22 on the cover 2 side. Not taken. Therefore, in this electrical equipment cabinet, in order to prevent the protrusion 22 from being displaced in the direction in which the ribs 12 are arranged in the gap 14 on the cabinet body 1 side and preventing the displacement of the cabinet body 1 and the cover 2, It was necessary to take measures to prevent such misalignment at the location. Moreover, in the electric equipment cabinet of FIG. 8, since the rib 12 has protruded from the inner surface of the side wall 11 of the cabinet body 1 to the inner side, the internal space of the electric equipment cabinet is reduced by that much, and downsizing and downsizing are impeded. There was a problem.

  On the other hand, in the electric equipment cabinet having the structure described with reference to FIG. 9, the rigidity or strength of the side wall 21 of the cover 2 is reduced in accordance with the size of the opening 24, and an extra panel 26 is required. As a result, there was a problem that the number of necessary parts increased and the cost increased.

  On the other hand, in the technique proposed by Patent Document 1, when the case is molded with resin, the protruding shaft on the case side protrudes in a direction perpendicular to the mold releasing direction of the case from the molding die. There is a problem that the structure of the mold is complicated. Further, the techniques proposed in Patent Document 2 and Patent Document 3 have a problem that an extra lid having a fitting claw, a catch member, and the like are necessary.

  The present invention has been made in view of the circumstances and problems described with reference to FIG. 8 and FIG. 9, and it is possible to ensure strength against impulses in the front, rear, left, right, and top and bottom directions of an electrical equipment cabinet without providing ribs. In addition, it is an object of the present invention to provide an electric equipment cabinet that facilitates the miniaturization and downsizing by omitting ribs and securing a large internal space.

  Further, the present invention provides an electric equipment cabinet that can simplify the structure of the molding die by eliminating a protruding portion that intersects the releasing direction from the molding die when the electric equipment cabinet is a resin molded body. The purpose is to provide.

  The electrical equipment cabinet according to the present invention is formed by combining a cabinet body and a cover, and by combining them, the end surfaces of their side walls are butted against each other and overlap each other. In an equipment cabinet, a recess formed by removing a side wall including its end face and a tongue-like engagement projecting from the end face of the side wall of the cabinet main body and the cover in the thickness direction. The engaging pieces on the cabinet body side are fitted in the recesses on the cover side, and the engaging pieces on the cover side are fitted in the recesses on the cabinet body side.

  According to the electrical equipment cabinet having this configuration, the end surfaces of the cabinet main body and the side walls of the cover are abutted and overlapped with each other, so that it is easy to ensure the strength that can withstand the impulse in the vertical direction, and the cabinet body side engagement. It is easy to secure the strength that can withstand the impulse in the left and right direction (inside and outside direction) by fitting the piece into the recess on the cover side and the engagement piece on the cover side in the recess on the cabinet body side. Become. Moreover, the recessed part provided in each side wall of a cabinet main body and a cover is formed by removing including the end surface of those side walls, and an engagement piece protrudes from the end surface of those side walls. Due to the tongue-like shape, it is not necessary to provide the cabinet body or cover with a protruding portion that intersects the mold release direction from the mold, and the structure of the mold can be simplified.

  In the present invention, the edge of the engagement piece engages with the stepped surfaces on both sides of the recess at the fitting position between the engagement piece and the recess, and displacement in the width direction thereof is prevented. In addition, it is desirable that the engagement piece and the bottom wall of the recess overlap each other at the fitting portion. According to this, the engagement piece and the engagement piece at the fitting portion between the engagement piece and the recess Since the recesses are positioned with respect to each other in the width direction, a situation in which the cabinet body and the cover are not displaced does not occur. Moreover, since the engagement piece and the bottom wall of the recess overlap each other at the fitting portion between the engagement piece and the recess, the effect that the engagement piece supports and reinforces the bottom wall of the recess is exhibited. This improves the resistance to deformation in the lateral direction.

  In the present invention, there is an electric component that is attached to the cabinet body side and has an electrical component that protrudes outside the side wall of the cabinet body above the side wall of the cabinet body and is placed on the upper end of the side wall of the cabinet body in the assembly process. It is possible to adopt a configuration in which the opening into which the electrical component is inserted is opened on the side wall of the cover when the side wall of the cover in the posture is raised to an upright position and the end surface is overlapped with the end surface of the cabinet body. Is possible. According to this, it is not necessary to provide an extra panel 26 as described in FIG. 9 or to form the opening 24 in the side wall of the cover as described in FIG.

  In the present invention, the protruding surface formed by extending the stepped surface of the recess on the cabinet body side so as to protrude from the upper end surface of the side wall of the cabinet body is formed in the width direction of the engagement piece on the cover side in the assembly process. It is possible to adopt a configuration in which the end edge is locked and the engaging piece is formed as a guide surface for positioning with respect to the recess on the cabinet body side. There is an advantage that the alignment between the engaging piece and the recess is easily and accurately performed, and the assembling workability or mass productivity is improved.

  The electrical equipment cabinet according to the present invention is formed by combining a cabinet body and a cover, and by combining them, the end surfaces of their side walls are butted against each other and overlap each other. In an equipment cabinet, a recess formed by removing a side wall including its end face and a tongue-like engagement projecting from the end face of the side wall of the cabinet main body and the cover in the thickness direction. The pieces are formed alternately and the engagement pieces on the cabinet body side are fitted in the recesses on the cover side, the engagement pieces on the cover side are fitted in the recesses on the cabinet body side, In the fitting portion between the engagement piece and the recess, the end edge of the engagement piece engages with the stepped surfaces on both sides of the recess, and the displacement in the width direction is prevented. In addition, the engaging piece and the bottom wall of the recess overlap each other at the fitting position, and the electric part is attached to the cabinet body side and protrudes outside the cabinet body side wall above the cabinet body side wall. The electrical component is inserted when the side wall of the cover in a lying position placed on the upper end of the side wall of the cabinet body is raised in the assembling process and the end surface is overlapped with the end surface of the cabinet body. A pair of openings formed on the side walls of the cover and facing each other by extending the stepped surfaces on both sides of the recess on the cabinet body side so as to protrude from the upper end surface of the side wall of the cabinet body. The projecting surface of the cover is engaged with the engagement piece on the cover side in the assembly step, and the engagement piece is positioned with respect to the recess on the cabinet body side. Is formed as a surface, it is further embodied by adopting the structure that. The operation of the present invention will be described in detail with reference to the embodiments described later.

  FIG. 1 is a schematic perspective view showing an external appearance of an electric equipment cabinet 100 according to the present invention, FIG. 2 is a schematic partial vertical side view illustrating an electric component T and the like disposed therein, and FIG. 4 (A) and 4 (B) are schematic vertical cross-sectional views at different locations, FIG. 5 is a side view of the main part viewed from the inside of the electric equipment cabinet 100, and FIGS. 6 (A) and 6 (B). FIG. 7 is an explanatory view showing an assembling procedure, and FIG. 7 is an exploded perspective view of a main part according to a modification.

  As shown in FIG. 1, the electrical equipment cabinet 100 is a resin molded body formed into a rectangular box shape by combining the cabinet body 30 and the cover 40, and the cabinet body 30 and the cover are disposed on the side of the electrical equipment cabinet 100. The alignment part a with 40 appears linearly. Further, the cabinet body 30 and the cover 40 are provided with side walls 31 and 41, respectively, and the side wall 41 of the cover 40 is provided with an opening 42 through which an electric component T (see FIG. 2) described later faces outside. .

  As shown in FIG. 2, the power supply board P <b> 1 and the main board P <b> 2 are arranged in two stages on the cabinet body 30, and the electrical component T mounted on the main board P <b> 2 faces the outside from the opening 42. The cover 40 is assembled to the cabinet body 30 after the power supply board P1 and the main board P2 are assembled to the cabinet body 30, and the electrical equipment cabinet 100 is assembled.

  As shown in FIG. 3, the inner side of the side wall 31 of the cabinet body 30 has a recess 34 formed by removing the side wall 31 including its end surface 33 and the end surface 33 of the side wall 31 upward. Protruding tongue-shaped engagement pieces 35 are alternately arranged. Therefore, at the outer side portion in the thickness direction of the side wall 31, the end surface 33 protrudes outside the engaging piece 35 and the recess 34. Similarly, in the thickness direction inner side portion of the side wall 41 of the cover 40, a recess 44 formed by removing the side wall 41 including its end surface 43 and a tongue piece protruding from the end surface 43 of the side wall 41 are provided. The engagement pieces 45 are formed in an alternating manner. Therefore, at the outer side portion of the side wall 41 in the thickness direction, the end face 43 protrudes outside the engagement piece 45 and the recess 44. When both ends of the side wall 41 of the cover 40 are aligned with both ends of the side wall 31 of the cabinet body 30, the respective recesses 44 on the cover 40 side face the respective engagement pieces 35 on the cabinet body 30 side, respectively. The engagement pieces 45 on the cover 40 side face the respective recesses 34 on the main body 30 side.

  In the box-shaped electrical equipment cabinet 100 assembled by combining the cabinet body 30 and the cover 40, the cross-sectional shape of the fitting portion M1 between the recess 34 on the cabinet body 30 side and the engagement piece 45 on the cover 40 side is shown. FIG. 4 (A) shows the cross-sectional shape of the fitting location M2 between the engagement piece 35 on the cabinet body 30 side and the recess 44 on the cover 40 side, and FIG. The side view shapes of M1 and M2 are shown in FIG. Next, the structure of these fitting locations M1 and M2 will be described.

  4A and 5, the engagement piece 45 on the cover 40 side is fitted into the recess 34 on the cabinet body 30 side, and the engagement piece 45 and the bottom wall of the recess 34 are fitted. The corresponding thin portion 31 ′ of the side wall 31 on the cabinet body 30 side overlaps, and both end edges in the width direction of the engagement piece 45 engage with the stepped surfaces 34 a and 34 a on both sides in the groove width direction of the recess 34. Thus, the positional deviation in the width direction is prevented. 4B and 5, the recess 44 on the cover 40 side is engaged with the engagement piece 35 on the cabinet body 30 side, and the engagement piece 35 and the recess 44 are engaged. The thin portion 41 ′ of the side wall 41 on the cover 40 side corresponding to the bottom wall of the cover 40 overlaps, and both end edges in the width direction of the engagement piece 35 are stepped surfaces 44 a and 44 a on both sides in the groove width direction of the recess 44. And the displacement in the width direction is prevented. The end surface 33 of the side wall 31 (including the thin portion 31 ′) of the cabinet body 30 and the end surface 43 of the side wall 41 (including the thin portion 41 ′) of the cover 40 are overlapped with each other to form the linear shape shown in FIG. Are formed together.

  The electric equipment cabinet 100 of the embodiment having the configuration described with reference to FIGS. 4 and 5 does not have a portion corresponding to the rib 12 described with reference to FIG. Has been. Moreover, since the shape of the engagement pieces 35 and 45 and the recesses 34 and 44 is not a shape that obstructs the mold release when the cabinet body 30 or the cover 40 is molded from resin and released from the mold. In other words, since there is no portion protruding in the direction orthogonal to the mold release direction, the shape of the engagement pieces 35 and 45 and the recesses 34 and 44 is the shape of the mold for molding the cabinet body 30 and the cover 40. It also helps to simplify the structure.

  Further, when an impulse in the vertical direction as shown by arrows U and D in FIGS. 4A and 4B is applied to the electrical equipment cabinet 100, the end surfaces of the side walls 31 and 41 of the cabinet body 30 and the cover 40 are displayed. The 33 and 43 are pressed against each other and exhibit a strength that can withstand the impulse. Further, for the inward impulse (inward load) F applied to the side walls 11 and 21, the engagement piece 45 of the fitting location M1 supports the thin portion 31 'of the side wall 31, and the fitting location M2 The engagement piece 35 supports the thin portion 41 ′ of the side wall 41, and the thin portion 31 ′ of the side wall 31 of the fitting position M 1 is engaged with the impulse (outward load) opposite to the impulse F. Since the thin portion 41 ′ of the side wall 41 of the fitting portion M 2 supports the engagement piece 35 while supporting the joint piece 45, the side wall 31 of the cabinet body 30 and the cover 40 can be provided without providing an extra rib on this portion. , 41 ensures the required strength. In this regard, even if the thickness of the side walls 31 and 41 is increased to ensure the required strength, the internal space of the electrical equipment cabinet 100 should be secured wider than when the ribs 12 described with reference to FIG. 8 are provided. I was able to.

  Furthermore, even when front and rear impulses (forward load and rearward load) as shown by arrow H in FIG. 5 are applied to the electrical equipment cabinet 100, the edges of the engagement pieces 35 and 45 are located at the respective fitting locations M1 and M2. Engagement with the stepped surfaces 44a and 34a on both sides of the recesses 44 and 34 and their displacement in the width direction is prevented, the engagement pieces 35 and 45 and the recesses 44 and 34 have a width. The positions of the cabinet main body 30 and the cover 40 are prevented from being misaligned with each other in the direction.

  As described above, in this electrical equipment cabinet 100, although no ribs are provided, the impulses applied in the front, rear, left, right, and up and down directions are received by the fitting locations M1 and M2 and easily deformed. A strong structure that is not damaged is obtained. As a result of the investigation, when this electric equipment cabinet 100 was used as, for example, a casing of a projector equipped with an optical system, even when the casing was held with both hands, the side wall was not deformed inward.

  In the assembly process of the electrical equipment cabinet 100 described above, it is also possible to take a procedure in which the cover body 40 is pushed down from above the cabinet body 30 to engage the engagement pieces 35 and 45 in the recesses 44 and 34 in the vertical direction. However, if such a procedure is adopted, the electrical component T cannot be exposed to the outside from the opening 42 shown in FIG. Therefore, in this case, it is advantageous to employ the procedure described next with reference to FIGS.

  FIG. 6 (A) illustrates a procedure at a location corresponding to the fitting location M1 in FIGS. 4 (A) and 5 and FIG. 6 (B) is a fitting location in FIGS. 4 (B) and 5. The procedure at the location corresponding to M2 is shown in an explanatory manner.

  That is, as shown in the left diagrams of FIGS. 6A and 6B, with respect to the cabinet body 30 placed on the work surface, the side wall 41 of the cover 40 is placed in a lying posture and the end of the side wall 41 is set to the cabinet body 30. The cover 40 is overlapped on the upper end of the side wall 31 and the cover 40 is rotated as indicated by an arrow R with the overlapping portion A as a fulcrum. 6A and 6B, the engagement piece 45 on the cover 40 side is fitted into the recess 34 on the cabinet body 30 side, and the recess 44 on the cover 40 side is formed. It fits into the engagement piece 35 on the cabinet body 30 side, and at the same time, the end faces 33, 43 of the side walls 31, 41 overlap each other. In particular, when this procedure is adopted, even if an electrical component T protruding outside the side wall 33 of the cabinet body 30 is provided above the side wall 33 of the cabinet body 30 as shown in FIG. There is an advantage that the electrical component T is naturally inserted into the opening 42 provided at an appropriate position of the side wall 41 of the 40 when the cover 40 is rotated with the overlapping portion A as a fulcrum. 6 (A) and 6 (B) merely illustrate the procedure in the case where the overlapping portion (a) is selected as the overlapping portion between the end portions of the side walls 41 and 31, the overlapping portion of other portions. It is also possible to adopt a procedure in which the cover 40 is rotated around the fulcrum. For example, it is also possible to employ a procedure in which the engagement piece 45 on the cover 40 side is overlapped on the side wall 31 of the cabinet body 30 and the cover 40 is rotated using the overlapping portion as a fulcrum. When this procedure is adopted, as shown in FIG. 7, each of the stepped surfaces 34 a and 34 a on both sides of the recess 34 on the cabinet body 30 side is separated from the upper end surface of the side wall 31 of the cabinet body 30. It is beneficial to form a pair of opposing projecting surfaces 34a 'and 34a' by extending the dimension h so as to project. In this way, the engaging piece 45 in the lying posture on the cover 30 side is fitted between the projecting surfaces 34a ′ and 34a ′, and the engaging piece 45 is used as the guide surfaces as the projecting surfaces 34a ′ and 34a ′. Since positioning can be performed with respect to the recess 34 on the cabinet body 40 side, the engagement piece 45 can be accurately fitted into the recess 34 by rotating the cover 40 thereafter. In the case of FIG. 7, the side wall 41 is removed on both sides of the engagement piece 45 of the cover 40 and the recessed portions 46 into which the protruding surfaces 34 a ′ and 34 a ′ are fitted are provided.

It is the schematic perspective view which showed the external appearance of the electric equipment cabinet which concerns on this invention. FIG. 2 is a schematic partial vertical side view illustrating the electrical components and the like disposed therein. It is a disassembled perspective view of the principal part. (A) (B) is a schematic longitudinal cross-sectional view of the electric equipment cabinet in a mutually different location. It is the side view of the principal part seen from the inner side of the electric equipment cabinet. (A) (B) is explanatory drawing which showed the assembly procedure. It is a disassembled perspective view of the principal part by a modification. It is sectional drawing of the principal part of the conventional electric equipment cabinet. It is a schematic perspective view of the principal part of the cover which has a panel.

Explanation of symbols

30 Cabinet body 31, 41 Side wall 42 Opening 33, 43 End surface 34, 44 Side wall 34, 44 Recess 34a, 44a Stepped surface 34a 'Protruding surface 35, 45 Engagement piece 40 Cover 100 Electric equipment cabinet M1, M2 Engagement piece and depression Mating point with T

Claims (5)

In the electrical equipment cabinet formed of a resin body that is formed by combining the cabinet body and the cover, and the end surfaces of the side walls are butted against each other by combining them,
On the inner side in the thickness direction of each side wall of the cabinet body and the cover, a recess formed by removing the side wall including its end face and a tongue-like engagement piece projecting from the end face of the side wall are alternated. And the engagement piece on the cabinet body side is fitted in the recess on the cover side, the engagement piece on the cover side is fitted in the recess on the cabinet body side,
In the fitting portion between the engagement piece and the recess, the edge of the engagement piece engages with the stepped surfaces on both sides of the recess to prevent displacement in the width direction, and The engagement piece and the bottom wall of the recess overlap each other at the fitting location,
An electrical component mounted on the cabinet body side and protruding above the cabinet body side wall above the cabinet body side wall and mounted on the upper end of the cabinet body side wall in the assembly process. When the side wall is raised in an upright position and its end face is overlapped with the end face of the cabinet body, an opening into which the electrical component is inserted is opened in the side wall of the cover,
A pair of projecting surfaces formed in an opposing state by extending each of the stepped surfaces on both sides of the recess on the cabinet body side so as to protrude from the upper end surface of the side wall of the cabinet body, An electrical equipment cabinet characterized by being formed as a guide surface for fitting an engaging piece and positioning the engaging piece with respect to a recess on the cabinet body side. In the electrical equipment cabinet formed of a resin body that is formed by combining the cabinet body and the cover, and the end surfaces of the side walls are butted against each other by combining them,
On the inner side in the thickness direction of each side wall of the cabinet body and the cover, a recess formed by removing the side wall including its end face and a tongue-like engagement piece projecting from the end face of the side wall are alternated. The engaging piece on the cabinet body side is fitted in the recess on the cover side, and the engaging piece on the cover side is fitted in the recess on the cabinet body side. Equipment cabinet. In the fitting portion between the engagement piece and the recess, the edge of the engagement piece engages with the stepped surfaces on both sides of the recess to prevent displacement in the width direction, and The electrical equipment cabinet according to claim 2, wherein the engagement piece and the bottom wall of the recess overlap each other at the fitting location. An electrical component mounted on the cabinet body side and protruding above the cabinet body side wall above the cabinet body side wall and mounted on the upper end of the cabinet body side wall in the assembly process. The electrical equipment cabinet according to claim 3, wherein an opening into which the electrical component is inserted is opened in the side wall of the cover when the side wall is raised in an upright position and its end surface is superimposed on the end surface of the cabinet body. The protruding surface formed by extending the stepped surface of the recess on the cabinet body side so as to protrude from the upper end surface of the side wall of the cabinet body is engaged with the edge in the width direction of the engagement piece on the cover side in the above assembly process. The electrical equipment cabinet according to claim 4, wherein the electrical equipment cabinet is formed as a guide surface that stops and positions the engaging piece with respect to the recess on the cabinet body side.

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