JP4091497B2 - Electrical junction box and its assembly method - Google Patents

Description

  The present invention relates to an electrical junction box for assembling while positioning a component with a guide pin and an assembling method thereof.

  12 to 14 show an embodiment of a conventional electrical junction box and its assembly method (see, for example, Patent Document 1).

  As shown in FIG. 12, the electrical junction box 81 includes an upper cover (main cover) 82 made of synthetic resin, a lower cover 83, a bus bar wiring board 84 disposed between both covers, and the like. The upper cover 82 includes a mounting portion 85 for electric parts such as a fuse and a relay, a connector housing 86, and the like. The bus bar wiring board 84 is formed by routing a plurality of bus bars 87 having a required shape on an insulating substrate, and a plurality of bus bars are usually laminated.

  The upper and lower covers 82 and 83 and the bus bar wiring board 84 are provided with positioning holes 88 for assembly, and as shown in FIG. 13, a fixing welding pin 89 protrudes integrally on the back surface (inner surface) of the upper cover 82. The welding pin insertion hole 90 is provided in the lower cover 83 and the bus bar wiring board 84. A guide pin 92 for each positioning hole 88 projects from the assembly table 91.

The upper cover 82 is turned upside down and set while the positioning holes 88 are engaged with the guide pins 92 of the assembly table 91, and the positioning holes 88 are engaged with the guide pins 92 in the order of the bus bar wiring board 84 and the lower cover 83. Meanwhile, the welding pins 89 of the upper cover 82 are inserted into the respective insertion holes 90, and the tip end portions 89 a of the welding pins 89 penetrating the lower cover 83 are melted and crimped to the lower cover 83 as shown in FIG. 14.
Japanese Utility Model Publication No. 63-127222 (Figs. 5-7)

  However, in the conventional electrical junction box and its assembling method, water and dust enter the junction box from the positioning holes 88 of the upper and lower covers 82 and 83 into which the guide pins 92 are inserted, and the internal bus bar wiring There was a concern that the plate 84 and the like may be adversely affected by short-circuiting or rusting, and even if water does not enter, condensation may occur on the inner surface of the junction box and cause similar problems. Further, for example, when a plurality of terminals (not shown) protrude downward on the bus bar wiring board 84 and the terminals are inserted and connected to connectors of other unit parts (not shown) on the lower cover 83 side, etc. There was concern that workability and reliability of assembly and connection would be reduced.

  In view of the above points, the present invention can reliably prevent the intrusion of water and the like due to positioning means during assembly and the occurrence of internal dew condensation. In addition, the wiring board and other unit parts It is an object of the present invention to provide an electrical junction box that can be reliably assembled and connected, and an assembly method thereof.

In order to achieve the above object, an electrical junction box according to claim 1 of the present invention is provided with a bottomed positioning hole for inserting a primary guide pin erected on an assembly base in a first step. An opening is provided on the back side of the main cover to be accommodated, the assembly is provided with a positioning hole for allowing the primary guide pin to pass through, and the secondary guide pin erected on the assembly stage in the second step is provided. A bottomed positioning hole for insertion is provided on the surface side of the main cover so that the assembly and the main cover are positioned by the primary guide pin, and the secondary guide pin has the positioning hole. The assembly of the parts to the assembly is performed in a state where the positioning holes on the surface side are engaged .

  With the above configuration, for example, the assembly is set along the primary guide pin, and then the main cover is smoothly assembled to the outside of the assembly by engaging the positioning hole of the main cover with the primary guide pin. The bottom of the positioning hole is closed on the surface side of the main cover or close to the surface, and does not penetrate (open) to the outside. Therefore, after assembly, water enters the main cover (in the electrical junction box) through the positioning hole from the outside. And dust do not enter.

Further, the positioning hole on the surface side of the main cover is engaged with the secondary guide pin, whereby the main cover is positioned and set upside down. The main cover is smoothly assembled outside the assembly. In this state, other parts are mounted on the assembly in the main cover. The assembly and other parts are electrically connected. Because the main cover is positioned and fixed, in particular assembled parts in automatic machines, with parts assembling and connection for the assembly of the main cover is correctly carried out without displacement, the connection status visually verifiable and Become. The bottom of the positioning hole is closed on the back side of the main cover or close to the back side, and does not penetrate (open) the back side. After assembly, it passes from the outside into the main cover (in the electrical junction box) through the positioning hole. Water and dust do not enter.
The positioning hole of the assembly is engaged with the primary guide pin, and the tip of the primary guide pin protrudes through the assembly. A positioning hole on the back side of the main cover is engaged with the tip of the guide pin. Thereby, the assembly and the main cover are smoothly engaged without being displaced.

An electrical junction box according to a second aspect is the electrical junction box according to the first aspect , wherein the positioning holes on the back side and the front side are arranged in a pair of diagonal directions.

  With the configuration described above, two positioning holes on the back side are arranged in the diagonal direction, so that the engagement of the main cover with respect to the primary guide pin is accurately positioned in the XY direction (two-dimensional direction), but with fewer positioning holes. Smooth operation with low sliding resistance without catching. Similarly, since the two positioning holes on the front side are arranged in the diagonal direction, the engagement of the main cover with the secondary guide pin is accurately positioned in the XY direction (two-dimensional direction), and with fewer positioning holes. Smooth operation with low sliding resistance without catching.

The electrical junction box according to claim 3 is the electrical junction box according to claim 2 , wherein the pitches of the positioning holes on the back side and the front side are made different.

  With the above configuration, when trying to engage the positioning hole on the back side with the secondary guide pin, or when trying to engage the positioning hole on the front side with the primary guide pin, each positioning hole is related to each guide pin. Incorrect assembly is prevented. The positioning hole on the back side and the positioning hole on the front side may be arranged near one diagonal line, or the positioning hole on the back side is arranged along one diagonal line, and the positioning hole on the front side is located on the other side. You may arrange | position along a diagonal.

An assembly method for an electrical junction box according to claim 4 is an assembly method for an electrical junction box for assembling the electrical junction box according to any one of claims 1 to 3 , wherein the assembly is attached to the primary guide pin. A three-dimensional positioning hole is penetrated and engaged, and then a positioning hole on the back side of the main cover is engaged with the tip of the primary guide pin to form a connection box main body, and then the connection box main body is The primary guide pin is separated from the primary guide pin and reversed, the positioning hole on the surface side of the main cover is engaged with the secondary guide pin, and the component is mounted on the assembly side in this state.

With the above configuration, the positioning hole of the assembly is engaged with the primary guide pin, and then the positioning hole on the back surface side of the main cover is engaged, so that the assembly is assembled in the main cover. Next, the main part of the connection box is detached from the primary guide pin, turned upside down, the positioning hole on the front side of the main cover is engaged with the secondary guide pin, and other parts are mounted on the assembly in the main cover. The

Because the main cover is positioned and fixed, in particular when assembling the parts in an automatic machine, with attached components of the set are performed accurately without displacement, a visual inspection allows connection state. By assembling the parts to the assembly separately from the assembly of the assembly to the main cover, for example, when connecting the terminals on the assembly side and the terminals on the part side, the connection and connection confirmation between the terminals are hidden by the main cover. It can be done reliably without being. After assembly, the positioning holes on the front side do not penetrate to the back side, and the positioning holes on the back side do not penetrate to the front side, so the inside of the main cover (in the electrical junction box) passes through the positioning hole from the outside. Water and dust do not enter the battery.

  As described above, according to the first aspect of the present invention, since the positioning hole for assembly is not opened to the outside, water or dust can enter from the outside into the electrical junction box or internal condensation can surely occur. This prevents the occurrence of problems such as short circuits in the assembly and poor conduction due to rust, and improves the reliability of the electrical connection of the electrical junction box.

In addition, after the assembly is assembled in the main cover, the main cover can be positioned and fixed, and other parts can be accurately assembled and connected to the assembly. The box can be assembled efficiently, and the reliability of the electrical connection of the electrical junction box can be improved. In addition, since the positioning holes on the front side do not penetrate (open) inside the cover, entry of water and dust into the electrical junction box from outside and internal condensation are reliably prevented, and the assembly circuit There are no problems such as short-circuit or rust failure due to rust, and the reliability of the electrical connection of the electrical junction box is improved.
In addition, the assembly and the main cover are smoothly engaged with each other without displacement, and the assembly efficiency of the electrical junction box is increased.

According to the second aspect of the present invention, the engagement set of the main cover with respect to the guide pin is performed accurately and smoothly in the two-dimensional direction, and the assembly efficiency of the electrical junction box is improved.

According to the invention described in claim 3 , since the positioning holes on the front and back are aligned only with the corresponding guide pins, the main cover is prevented from being erroneously set, the erroneous assembly of the component parts accompanying the erroneous setting is prevented, and the electrical connection The assembly quality of the box is improved.

According to the invention described in claim 4, apart from the assembly of the assembly into the main cover, the components can be smoothly assembled to the assembly, and thereby, for example, the electrical connection between the assembly and the components and its The check can be performed smoothly and accurately, and the assembly quality of the electrical junction box is improved. Needless to say, water or the like can be prevented from entering from the positioning holes of the main cover, and the connection quality of the electrical junction box can be improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a main cover of an electrical junction box according to the present invention, and FIG. 2 shows a wiring board assembly housed in the main cover.

  The main cover 1 is made of an insulating synthetic resin, and is surrounded by a relatively deep accommodation space 6 surrounded by upper, left and right and rear wall portions 2 to 5 (FIG. 9), and a front opening following the accommodation space 6. 7. The upper wall 2 is integrally provided with connector housings 8 to 14 having various shapes, a relay mounting portion 15 and the like.

  In addition, two bottomed positioning holes 21 and 22 are provided from the surface of the upper wall portion 2 toward the accommodation space 6, and the upper wall portion 2 on the back surface side (accommodation space side) of the upper wall portion 2. Two upward positioning holes (holes opened on the lower side) 23 and 24 with the top (bottom) closed are provided.

  As will be described later, the positioning holes 21 and 22 opened on the front surface side are used when the electronic unit (unit part or connection unit) 16 (FIG. 11) is assembled, and the positioning holes 23 and 24 opened on the back surface side are the electronic unit 16. Is used when assembling the wiring board assembly (assembly) 25 (FIG. 2) and the upper cover 1 except for. The positioning holes 21 to 24 are detachably engaged with guide pins 33 to 36 of assembly tables 31 and 32 (FIGS. 9 to 10) described later.

  As shown in FIG. 2, the wiring board assembly 25 includes a circuit wiring board 19 in which a plurality of wiring circuit boards 17 are stacked and a bus bar circuit board 18 is stacked in the first half of the wiring circuit board 17, and a circuit wiring board 19. The fuse block 20 is coupled to the front end of the fuse block 20.

  The wiring circuit board 17 includes an insulating substrate 27 having a peripheral wall 26, a plurality of electric wires 28 arranged in a required shape on the insulating substrate, and various terminals 29 and 30 connected (pressure contact) to the electric wires 28. The terminals 29 and 30 have a pressure contact portion 37 on one side and tab-like or pin-like electrical contact portions 38 and 39 on the other side.

The bus bar circuit board 18 is composed of an insulating substrate 40 and a plurality of bus bars 41 arranged on the insulating substrate. One end of the bus bar 41 projects forward as a sandwiching terminal 41 a for fuse connection. The end is bent downward at a right angle as a pressure contact portion 42 with respect to the electric wire 28.

Fuse block 20 is composed of a synthetic resin block body 44 having an accommodation chamber 43 for clamping terminals 41 a of the bus bar 41, a horizontal bus bar 46 forming the other clamping terminal 45 in receiving chamber. The bus bar 46 is connected to the bus bar circuit board 18. A blade-type fuse 47 is mounted in the accommodation chamber 43.

  Positioning holes 51 and 52 in the plate thickness direction are provided through the wiring circuit board 17 and the bus bar circuit board 18 of the wiring board assembly 25 one by one. The two positioning holes 51 and 52 are arranged diagonally. The positioning holes 51 and 52 are detachably engaged with guide pins 33 and 34 of an assembly table 31 (FIG. 9) described later. In the specification, the expression is distinguished by a “hole” penetrating and a “hole” with a bottom.

  FIG. 3 is a top view showing the surface side of the main cover 1.

  A first positioning hole 21 is provided between the connector housing 8 and the one side wall 3 at a position near the rear end of one side of the upper wall portion 2 (side closer to the one side wall 3). A second positioning hole 22 is provided between the front and rear connector housings 9 and 10 on the front half side of the other side of the portion 2 (side closer to the other side wall 4). The two positioning holes 21 and 22 are disposed substantially diagonally with respect to the main cover 1. The first positioning hole 21 is formed in an elliptical shape, and the second positioning hole 22 is formed in a true circle.

  As shown in FIG. 4, the first positioning hole 21 protrudes inside the main cover 1, and closes the annular peripheral wall 48 having an elliptical cross section perpendicular to the upper wall 2 and the bottom of the peripheral wall 48. It is configured to be surrounded by a bottom wall 49. As shown in FIG. 5, the second positioning hole 22 is formed by being surrounded by a circular peripheral wall 53 having a circular cross section perpendicular to the upper wall 2 and a bottom wall 54 closing the bottom of the peripheral wall 53. Yes. A tapered guide surface 50 is formed at the upper opening edge of each positioning hole 21, 22. The depth of each positioning hole 21 and 22 is, for example, about 10 mm.

  In FIG. 3, reference numerals 8 to 14 denote connector housings, 55 denotes a terminal insertion hole in the bottom wall of each connector housing, and 15 denotes a relay mounting portion which is an electric component mounting portion.

  A third positioning hole 23 is disposed near the first positioning hole 21 on the back surface side of the upper wall 2, and a fourth positioning hole 24 is disposed near the second positioning hole 22. This state is shown in FIG. 6 (back view of the main cover 1). The third positioning hole 23 is formed in an elliptical cross section, and the fourth positioning hole 24 is formed in a true circular section. The interval (pitch) between the third and fourth positioning holes 23 and 24 is set wider than the interval between the first and second positioning holes 21 and 22, and is misassembled with respect to the guide pins 33 to 36 (FIGS. 9 to 10). Attaching is prevented.

  The third positioning hole 23 is formed between the left and right connector housings 11 and 12 near the rear end (rear wall 5) of the upper wall 2. The centers of the opposing wall portions 56 of the connector housings 11 and 12 are integrally connected by an annular peripheral wall 57 of the third positioning hole 23. This saves space and increases the rigidity of the positioning hole 23. As shown in FIG. 7, the C-C cross section of the third positioning hole 23 is such that the lower opening 23 a of the third positioning hole 23 is located on the same horizontal plane as the bottom walls 58 of the connector housings 11, 12. A top wall (wall portion) 59 that closes the upper portion (bottom portion) of the hole 23 is formed integrally with the upper wall 2 of the main cover 1 on the same horizontal plane.

  The fourth positioning hole 24 is formed between the front and rear connector housings 13 and 14 on the other side of the upper wall 2 (near the other side wall 4). As shown in FIG. 8 in the DD cross section of the fourth positioning hole 24, the annular peripheral wall 60 of the positioning hole 24 is integrated with the wall portion of one connector housing 13, and the wall portion and rib of the other connector housing 14 are integrated. 61 (FIG. 6). This saves space and increases the rigidity of the hole structure. A top wall (wall portion) 62 that closes the upper portion (bottom portion) of the fourth positioning hole 24 is formed integrally with the upper wall 2 of the main cover 1 and on the same horizontal plane as the upper surface of the upper wall 2.

  FIG. 9 shows an embodiment of an assembly method (manufacturing method) of the electrical junction box, and the wiring board assembly 25 of FIG. 2 and the main cover 1 of FIG. Assemble in order. In FIG. 9, the wiring board assembly 25 is not shown.

  Two diagonal guide pins (primary guide pins) 33 and 34 are vertically provided on the first assembly table 31. The length of each guide pin 33, 34 is set to be longer than the maximum thickness of the wiring board assembly 25 (FIG. 2), and the thickness of each guide pin 33, 34 is set to each positioning hole 51, 52 (FIG. 2) or the back surface. The positioning holes 23 and 24 on the side are set slightly thinner than the minimum inner diameter.

  First, the guide pins 33 and 34 are inserted into the two through-hole positioning holes 51 and 52 of the wiring board assembly 25 (FIG. 2) (the positioning holes are detachably engaged with the guide pins). The tip portions of the guide pins 33 and 34 penetrate the wiring board assembly 25 and protrude upward.

  Next, the tip portions of the guide pins 33 and 34 are inserted into the third and fourth positioning holes 23 and 24 on the back surface side of the main cover 1 (the positioning holes are detachably engaged with the tip portions of the guide pins). The positioning holes 51 and 52 of the wiring board assembly 25 and the positioning holes 23 and 24 of the main cover 1 are positioned coaxially. The minimum inner diameters of the positioning holes 51 and 52 and the positioning holes 23 and 24 are preferably set to be the same.

  As a result of the positioning, the assembly of the wiring board assembly 25 and the main cover 1 can be performed smoothly and easily without tilting, interference and rubbing. The main cover 1 accommodates the wiring board assembly 25 so as to wrap it. The tab-like, tuning-fork-like terminals 29, 63, 64 (FIG. 2) projecting upward from the wiring board assembly 25 are insertion holes in the bottom wall of the connector housing of the main cover 1 and the relay mounting portion (housing). 55 (FIG. 1) is smoothly inserted without any positional shift, interference or rubbing associated therewith. The wiring board assembly 25 is preferably locked to the main cover 1 by locking means.

  By providing two guide pins 33, 34 and positioning holes 51, 52 and positioning holes 23, 24 corresponding to the guide pins in a diagonal direction, positioning is performed accurately, and one of the pair of positioning holes 23 is formed in a long hole shape. By adopting an (elliptical) shape, an allowable dimensional error is absorbed by the long hole-shaped positioning hole, and assembly is performed smoothly.

  Next, the junction box main body 65 (FIG. 10) composed of the main cover 1 and the wiring board assembly 25 is pulled up from the guide pins 33 and 34 (the guide pins 33 and 34 are lifted from the positioning holes 51 and 52 and the positioning holes 23 and 24. 10 to 11, the connection box main body 65 is turned upside down so that the two guide pins (secondary guide pins) 35 and 36 of the second assembly base 32 are placed on the front side of the main cover 1. The first and second positioning holes 21 and 22 are detachably engaged (a guide pin is inserted into the positioning hole).

  The length of the secondary guide pins 35 and 36 is set shorter than that of the primary guide pins 33 and 34, and the thickness of the secondary guide pins 35 and 36 is smaller than the minimum inner diameter of the first and second positioning holes 21 and 22. The diameter is set slightly smaller. The pitch of the secondary guide pins 35 and 36 is the same as that of the first and second positioning holes 21 and 22 and is narrow, and the pitch of the primary guide pins 33 and 34 is the pitch 23 and 24 of the third and fourth positioning holes. Are widely set to prevent misassembly.

  As shown in FIG. 11, the electronic unit board (electronic unit or unit component) 16 is mounted on the back side of the wiring board assembly 25 with the junction box main body 65 set upside down on the second assembly base 32. A substantially plate-shaped intermediate cover 66 made of synthetic resin is attached to the back surface of the wiring board assembly 25, and the electronic unit substrate 16 is attached from above the intermediate cover 66. The intermediate cover 66 may be mounted with the junction box main body 65 shown in FIG. 11 in an inverted set state, or in the assembly process of the junction box main body 65 shown in FIG. And may be assembled by engagement with the positioning hole. A pin-shaped terminal 39 on the back surface side of the wiring board assembly 25 protrudes from the hole of the intermediate cover 66. The intermediate cover 66 has a boss portion 67 for screwing the electronic unit substrate 16.

  The electronic unit board 16 is not provided with a positioning hole, the unit circuit board 68 is provided with a screw insertion hole 69 for the boss portion 67, a joint connector 70, a power supply or signal connector housing 71, and the illustrated figure. Electronic components that are not to be used are disposed upward. The joint connector 70 has a plurality of female terminals (not shown) inside the insulating housing. Each female terminal is connected to the circuit of the unit circuit board 68, and each female terminal has a pin shape of the wiring board assembly 25. Each male terminal 39 is inserted and connected. In order to securely insert and connect each male terminal 39 to each female terminal in the connector 70 without misalignment, the connection box main body 65 can be reversed by engaging the guide pins 35 and 36 with the positioning holes 21 and 22. It becomes.

  The electronic unit board 16 performs various controls of automobile parts. A sub cover (not shown) is mounted from above the electronic unit substrate 16 and is locked to the main cover 1. The main cover 1, the wiring board assembly 25 for connecting the relay and the fuse, the control electronic unit board 16, and the sub cover constitute an electrical connection box 72.

  An electronic unit block can be mounted as an electronic unit (unit component) instead of the electronic unit substrate 16. In addition to the electronic unit, other unit parts such as an electric unit and a connector block can be mounted. In the case of specifications that do not use these unit parts, the electrical junction box is assembled only by the first assembly table 31. Even in that case, it is preferable to provide positioning holes 21 to 24 on the front and back of the main case 1 so that the main cover 1 is shared. It is also possible to connect the terminal 39 of the wiring board assembly 25 to the electronic unit substrate 16 by means such as welding or wire pressure welding instead of connector connection.

  Further, the number of the positioning holes 51 and 52 and the positioning holes 21 to 24 is not limited to two, but may be three. However, it is best to provide two in the diagonal direction from the viewpoint of space saving and assembly workability. The interval between the positioning holes 21 to 24 can be set as appropriate. In addition, although it takes a little time, only one positioning hole and one positioning hole are provided, and the wiring board assembly 25 and the main cover 1 are abutted against each other at a position diagonal to the hole (hole). Positioning by positioning means is also possible. In order to further increase the positioning accuracy, it is possible to make all the positioning holes 21 to 24 have a perfect circular cross section. Speaking from the assembling order, the first and second positioning holes 21 and 22 on the front side become third and fourth positioning holes, and the third and fourth positioning holes 23 and 24 on the back side become first and second. Second positioning hole.

  Moreover, although the said wiring board assembly 25 uses both the bus-bar 41 and the electric wire 28, the wiring board assembly using only a bus bar or only an electric wire may be sufficient. The number of circuit boards 17 and 18 is appropriately set according to circuit specifications. The wiring board assembly 25 connects the relay, the fuse, and the connector at the same time. However, the wiring board assembly 25 may connect only the relay, only the fuse, or only the connector. In addition to the wiring board 17 and the circuit board 18, the assembly can be constituted by a connection block, a connection unit or the like (not shown). Also in this case, positioning holes 51 and 52 are provided through the assembly. Moreover, it is also possible to use a main cover surrounded by walls (peripheral walls) on all sides without using the fuse block 20 located on the front opening 7 side.

  Further, the primary guide pins 33 and 34 of the first assembly table 31 of FIG. 9 are made detachable, and the first assembly table 31 is provided with holes for mounting the secondary guide pins 35 and 36 of FIG. The second assembly table 32 can be constituted by the assembly table 31 and the secondary guide pins 35 and 36 shown in FIG.

It is a perspective view showing one embodiment of the main cover of the electric junction box concerning the present invention. It is a disassembled perspective view which similarly shows one Embodiment of the wiring board assembly of an electrical-connection box. It is a top view (top view) which shows the surface side of a main cover. It is AA sectional drawing of FIG. 3 which shows one positioning hole of the surface side of a main cover. It is BB sectional drawing of FIG. 3 which shows the other positioning hole of the surface side. It is a top view (bottom view) which shows the back surface side of a main cover. It is CC sectional drawing of FIG. 6 which shows one positioning hole of the back surface side of a main cover. It is DD sectional drawing of FIG. 6 which shows the other positioning hole of a back surface side. It is a front view which shows one form of the assembly method of the electrical junction box using a 1st assembly stand. It is a front view which shows one form of the assembly method of the electrical junction box using a 2nd assembly stand. It is a disassembled perspective view which shows the assembly method of the electrical-connection box similarly using the 2nd assembly stand. It is a disassembled perspective view which shows one form of the conventional electrical junction box. It is a perspective view which similarly shows one process of the assembly method of the conventional electrical junction box. It is a longitudinal cross-sectional view which similarly shows the other process of the assembly method of the conventional electrical junction box.

Explanation of symbols

1 Main cover 16 Electronic unit board (unit parts)
21, 22 Front side positioning holes 23, 24 Back side positioning holes 25 Wiring board assembly (assembly)
33, 34 Primary guide pin 35, 36 Secondary guide pin 51, 52 Positioning hole 65 Main part of connection box 72 Electric connection box

Claims (4)

A bottomed positioning hole for inserting a primary guide pin erected on the assembly stage in the first step is provided on the back side of the main cover that accommodates the assembly, and the primary assembly is provided in the assembly. A positioning hole for penetrating the guide pin is provided, and a bottomed positioning hole for inserting the secondary guide pin erected on the assembly stage in the second process is opened on the surface side of the main cover. Assembling of parts to the assembly is performed with the primary guide pin positioning the assembly and the main cover, and with the positioning hole on the surface side engaged with the secondary guide pin. An electrical junction box characterized in that is performed . Electrical connection box according to claim 1, wherein the respective positioning holes of the back side and the front side are arranged in each pair diagonally. The electrical junction box according to claim 2 , wherein pitches of the positioning holes on the back surface side and the front surface side are made different. A method for assembling an electrical junction box for assembling the electrical junction box according to any one of claims 1 to 3 , wherein a positioning hole of the assembly is passed through and engaged with the primary guide pin, and then the primary A positioning hole on the back side of the main cover is engaged with the tip of the guide pin to form a junction box main body, and then the junction box main body is separated from the primary guide pin and inverted, and the secondary A method for assembling an electrical junction box, wherein a guide pin is engaged with a positioning hole on the surface side of the main cover, and the component is mounted on the assembly side in that state.

Images