JP2000270439A - Part fixing structure for electric junction body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a parts fixing structure for electric junction box, with which parts to be fixed can be assembled easily which can secure waterproofing and can be reduced in manufacturing cost by simplifying a molding tool or reducing the number of molding processes. SOLUTION: A part fixing structure for electric junction box is provided with a bolt 31, a shaft section 31a of which is passed through an attaching section 35a of parts 35 to be fixed fixed to an electric junction box 33, a square nut 37 screwed on the shaft section 31a of the bolt 31, and an elastic support 39 which is put on the shaft section 31a of the bolt 31 and deformed in the diameter expanding direction, when the bolt 31 and nut 37 are tightened. The structure is also provided with a bottomed cylindrical section 41, which is integrally molded with the bottom wall 33a of the junction box 33 and has an inserting section for holding, into which the nut 37 can be inserted incapable of rotating and into which the support 39 is inserted. The parts 35 are fixed to the junction box 33 by press-contacting the outer peripheral section of the support 39 with the inner peripheral wall of the deformed member housing section 41b of the cylindrical section 41, by expanding the diameter of the support 39 and tightening the bolt 31 and nut 37.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for fixing a component of an electric junction box, and more particularly, to a structure for fixing a component to be fixed to the electric junction box with good assemblability, ensuring waterproofness, and forming metal. The present invention relates to a component fixing structure of an electric junction box, which can reduce manufacturing costs by simplifying a mold and reducing the number of molding steps.

[0002]

2. Description of the Related Art Conventionally, in connection processing of a wire harness of a vehicle or housing of electric parts such as fuses and relays,
An electric junction box made of synthetic resin is used. Such an electrical junction box is versatile so that its internal structure is becoming more complicated with the increase and diversification of electronic and electrical equipment mounted on vehicles, and it can flexibly respond to partial changes in specifications. It is becoming increasingly required to design with
It has become difficult to manufacture as a single molded article. Therefore, an electric connection box that is structurally designed based on the basic specifications and can be used for general purposes, and a fixed part that is assembled to the electric connection box by screws or the like are manufactured separately, and resin molded products are manufactured. An electric connection box having a configuration that allows a more complicated internal structure or a specification change by changing the fixed parts is used.

FIGS. 6 to 8 show a conventional example of a component fixing structure for fixing a fixed component resin-molded separately from the electric connection box inside such an electric connection box. . In the case of the component fixing structure shown in FIG. 6, a component fixing portion 4 for screwing is integrally formed on the bottom wall 1a of the electric connection box 1 which is structurally designed based on basic specifications and can be used for general purposes. . However, as shown in FIG.
A nut 10 that is screwed into a screw 8 that penetrates the mounting portion 6a of the fixed component 6 resin-molded separately from the electric junction box 1
It is fixedly mounted at the center of the column 11 by insert molding.

The component fixing structure shown in FIG. 8 is another conventional example, and is common to the example of FIG. 7 in that a component fixing portion 15 for screwing is integrally formed on the bottom wall 13 of the electric connection box. I do.
However, the component fixing portion 15 is formed by projecting a part of the bottom wall 13 into a headed tubular shape and penetrating a bolt insertion hole 17 in a flat portion at the top. As shown in the figure, the mounting portion 6a of the fixed component 6 formed of resin separately from the electrical junction box includes a bolt 19 having a shaft portion inserted through the bolt insertion hole 17 from below, and a bolt 19 Nut 21 screwed into
With this, it is fixed on the component fixing part 15. Then, in the case of this component fixing structure, in order to prevent the waterproofness of the electric connection box from being impaired by the bolt insertion hole 17, after the fixing operation of the fixed component 6, the sealing material 23 is provided around the head of the bolt 19. It is filling.

[0005]

However, in the component fixing structure shown in FIGS. 6 and 7, the insert molding of the nut 10 complicates the molding die of the electric connection box 1 and reduces the number of molding steps. There has been a problem in that the increase has occurred and the manufacturing cost of the electric junction box 1 has increased. On the other hand, in the case of the component fixing structure shown in FIG. 8, the structure of the component fixing portion 15 is simple, and the molding die for the electric connection box can be simplified and the number of molding steps can be reduced. A filling step of the sealing material 23 is required after the assembling work of the fixed component 6 in order to ensure the performance, and the filling step of the sealing material 23 causes a problem that the productivity is reduced and the manufacturing cost is increased. Was. In the case of the component fixing structure shown in FIG. 8, the bolt 19 inserted from below the bottom wall 13 of the electric connection box is
Unless the component 1 is tightened and held down until the fixation of the fixed component 6 is completed, the fixed component 6 may drop off or rotate together during the assembly work of the fixed component 6, and the fixability of the fixed component 6 is poor. There was also a problem.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems, and to improve the assemblability of a part to be fixed, ensure waterproofness, and simplify a molding die and reduce the number of molding steps. An object of the present invention is to provide a component fixing structure for an electric junction box that can reduce the manufacturing cost.

[0007]

SUMMARY OF THE INVENTION The object of the present invention is to provide a bolt through which a shaft penetrates a mounting portion of a part to be fixed which is fixed to an electric junction box, a nut screwed to the shaft of the bolt, A compression deformable member that is fitted to the shaft of the bolt and deforms in the radially expanding direction when the bolt and nut are tightened, and is integrally formed with an electric connection box, and the head of the bolt or the nut is non-rotatably fitted. A component fixing structure for an electric connection box having a fitting fitting for holding and a bottomed cylindrical portion into which the compression deformable member is inserted, wherein the compression deformable member is tightened by tightening the bolts and nuts. By expanding the diameter,
This is achieved by a component fixing structure for an electric connection box, wherein an outer peripheral portion of the compression deformable member is pressed against an inner peripheral wall of the bottomed cylindrical portion to fix the fixed component to an electric connection box.

According to the above construction, the head portion or the nut of the bolt is fitted into the holding fitting portion in the bottomed cylindrical portion integrally formed with the electric connection box, and the shaft portion is attached to the mounting portion of the fixed component and compressed. By tightening the bolt and the nut that have penetrated the deformable member, the compression deformable member expands and deforms. Then, the outer peripheral portion of the compression-deformed member whose diameter has been deformed is pressed against the inner peripheral wall of the bottomed cylindrical portion, whereby the fixed component is fixed to the electric connection box.

Therefore, it is not necessary to insert-mold a nut in advance in the bottomed cylindrical portion integrally formed with the electric connection box, and insert molding which makes the molding die of the electric connection box complicated and increases the molding process is required. Since it becomes unnecessary, the manufacturing cost can be reduced by simplifying the molding die of the electric connection box and reducing the number of molding steps. Further, it is not necessary to form a bolt insertion hole through which a bolt is inserted in the bottomed cylindrical portion, and it is possible to ensure waterproofness of the electric junction box without using a sealing material and to attach a fixed component. There is no need for complicated work such as inserting bolts from the back side of the electrical junction box. Therefore, it is possible to inexpensively manufacture an electric junction box having excellent waterproofness and assemblability of a fixed part.

[0010] Preferably, the compressive deformation member is formed of a cylindrical elastic support that penetrates the shaft portion of the bolt and fits into the bottomed cylindrical portion, so that the compressive deformation member is compressed and deformed. The amount and the press contact area with the inner peripheral wall of the bottomed cylindrical portion at the time of compressive deformation can be easily adjusted, and the setting of the fixing strength can be easily performed. Preferably, the compression deformation member is penetrated through the shaft of the bolt, and the outer peripheral edge is formed of a frusto-conical tapered spring washer facing the inner peripheral wall of the bottomed cylindrical portion, so that it is extremely easy and inexpensive. Therefore, the height of the bottomed cylindrical portion into which the tapered spring washer is inserted can be reduced.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a structure for fixing a component of an electric connection box according to an embodiment of the present invention. FIG. 1 is an exploded perspective view of a component fixing structure of an electric junction box according to a first embodiment of the present invention, and FIG. 2 is an explanatory diagram of a procedure for assembling a component to be fixed in the component fixing structure shown in FIG.

As shown in FIG. 1, the component fixing structure of the electric connection box according to the first embodiment includes a mounting portion 35 a of the fixed component 35 in which the shaft portion 31 a is incorporated in the electric connection box 33.
, A square nut 37 as a nut screwed into the shaft 31a of the bolt 31, and the bolt 31 and the square nut fitted to the shaft 31a of the bolt 31 passing through the mounting portion 35a. An elastic strut 39 as a compression deformable member that elastically deforms in the radially expanding direction when the 37 is tightened.
And a holding fitting part 4 integrally formed on the bottom wall 33a of the electric connection box 33 and capable of fitting the square nut 37 non-rotatably.
1a (see FIG. 2) and a bottomed cylindrical portion 41 into which the elastic column 39 is inserted. Further, a flat washer 43 fitted to the shaft portion 31a is interposed between the elastic column 39 and the mounting portion 35a.

The electric junction box 33 is structurally designed on the basis of basic specifications and can be used for general purposes, similarly to the electric junction box 1 shown in FIG. It is resin molded separately so that it can flexibly respond to changes in specifications and the like. The bottomed cylindrical portion 41
Has a deformable member accommodating portion 41b having a quadrangular cross section into which a substantially rectangular column-shaped elastic strut 39 is inserted, and the bottom side of the deformable member accommodating portion 41b is adapted to hold the square nut 37 so that it cannot rotate. It is a fitting portion 41a. That is, the holding fitting portion 41 a has a cross-sectional shape of the square nut 37.
By substantially matching the cross-sectional shape of the square nut 37.
Can be fitted non-rotatably.

The elastic strut 39 is made of a material such as rubber which is easily elastically deformed, has a square cross-sectional shape corresponding to the cross-sectional shape of a commercially available square nut 37, and has a shaft portion of the bolt 31. 31a has a through hole through which it is inserted. However, the outer diameter of the elastic strut 39 is set so that it can be easily inserted into the deformable member accommodating portion 41b when it is not compressed.

Next, a procedure for assembling the fixed component 35 by the component fixing structure according to the present embodiment will be described with reference to FIG. First, as shown in FIG. 2A, the bottomed cylindrical portion 4 integrally formed on the bottom wall 33a of the electric connection box 33.
The square nut 37, the elastic strut 39, and the flat washer 43 are sequentially put into the first deformable member accommodating portion 41b, and the fitting state shown in FIG. In addition, as shown in FIG. 1, a step portion on which the flat washer 43 can be seated is formed on the upper portion of the deformable member housing portion 41b.

Next, after the mounting portion 35a of the fixed component 35 is positioned on the bottomed cylindrical portion 41 on which the square nut 37 and the elastic column 39 are fitted, a flat washer is formed together with the through hole of the mounting portion 35a. 43 and bolt 31 penetrating elastic strut 39
Is screwed into the square nut 37. And
Turn the head of the bolt 31 to attach the shaft portion 31a to the square nut 37.
When it is tightened, the compressed elastic strut 39 is
As shown by an imaginary line (a) in FIG.
The fixed part 35 is fixed to the bottom wall 33 a of the electric connection box 33 because it is pressed against the inner peripheral wall of the electric connection box 33. Since the square nut 37 is fitted to the holding fitting portion 41a in the bottomed cylindrical portion 41 and is prevented from rotating, the square nut 37 does not rotate with the bolt 31 and is not rotated. It translates upward along the axis of the part 41.

Therefore, it is not necessary to insert-mold a square nut 37 in advance into the bottomed cylindrical portion 41 integrally formed with the bottom wall 33a of the electric connection box 33, which makes the molding die of the electric connection box 33 complicated and difficult. Since insert molding which causes an increase in the number of molding steps is not required, the production cost can be reduced by simplifying the molding die of the electric connection box 33 and reducing the number of molding steps.

Further, it is not necessary to form a bolt insertion hole through which the bolt 31 is inserted in the bottomed cylindrical portion 41, and the waterproofness of the electric connection box 33 can be ensured without using a sealing material. Moreover, troublesome work such as inserting the bolt 31 from the back side of the bottom wall 33a to which the fixed component 35 is attached is not required. Therefore, it is possible to manufacture the electric connection box 33 excellent in waterproofness and in assembling the fixed part 35 at low cost.

Further, the elastic column 3 which is a compression deformable member
Numeral 9 is made of a material that easily penetrates through the shaft portion 31a of the bolt 31 and is easily elastically deformed, such as rubber, which is inserted into the bottomed cylindrical portion 41. Therefore, it is possible to easily adjust the amount of compressive deformation of the elastic strut 39 and the area of the elastic pillar 39 that is in contact with the inner peripheral wall of the bottomed cylindrical portion 41 during the compressive deformation, thereby facilitating the setting of the fixing strength. Further, for example, by increasing the fitting gap of the elastic column 39 in the uncompressed state to the deformable member accommodating portion 41b, the bottomed cylindrical portion 41 can be formed without increasing the molding accuracy of the electric connection box 33 and the fixed component 35. Mounting part 35 for
Positioning a is easy, and assemblability is improved. Furthermore,
By appropriately selecting a material that can be sufficiently elastically deformed,
Even if the cross-sectional shape of the elastic pillar 39 does not completely match the cross-sectional shape of the deformable member accommodating portion 41b, a sufficient fixing strength can be obtained.

FIG. 3 is an explanatory diagram of a procedure for assembling a fixed component in a component fixing structure of an electric junction box according to a second embodiment of the present invention. In the component fixing structure of the electric junction box according to the second embodiment, a square bolt 32 having a square head 32b is used as a bolt for penetrating the mounting portion 35a of the fixed component 35. The bottomed cylindrical part 4
1 and a hexagonal nut as a nut to be screwed into the shaft portion 32a of the square bolt 32 that penetrates the mounting portion 35a and the flat washer 43 from below together with the elastic strut 39 and the flat washer 43 together with the elastic fitting 39. Except for using the nut 38,
This is the same as the component fixing structure of the electric connection box 33 according to the embodiment.

When assembling the fixed component 35 by the component fixing structure according to the second embodiment, first, the square bolt 32 is accommodated in the deformable member accommodating portion 41b of the bottomed cylindrical portion 41 from the head portion 32b. Then, the elastic strut 39 and the flat washer 43 are sequentially inserted and fitted into the deformable member accommodating portion 41b while penetrating the shaft portion 32a. As shown in FIG. 3A, after the elastic pillar 39 and the flat washer 43 are fitted on the square bolt 32 and the shaft portion 32a in advance, the assembly is attached to the deformable member accommodating portion 41b of the bottomed cylindrical portion 41. It may be housed inside.

Next, after the mounting portion 35a of the fixed component 35 is positioned on the bottomed cylindrical portion 41 on which the square bolt 32 and the elastic column 39 are fitted, a flat washer is formed together with the through hole of the mounting portion 35a. Shaft portion 32a of square bolt 32 having 43 passed therethrough
Hex nut 38 is screwed into. And hex nut 3
When the hexagon nut 38 is tightened to the shaft portion 32a by turning 8,
The compressed elastic column 39 tends to expand and deform as shown by the imaginary line (A) in FIG. 3B, and the outer peripheral portion of the elastic column 39 is pressed against the inner peripheral wall of the deformable member accommodating portion 41b. Therefore, the fixed part 35 is fixed to the bottom wall 33 a of the electric connection box 33. Since the head 32b is fitted into the holding fitting portion 41a in the bottomed cylindrical portion 41 and is prevented from rotating, the square bolt 32 cannot rotate with the hexagon nut 38 when it is tightened. Instead, it translates upward along the axis of the bottomed cylindrical portion 41.

Therefore, similarly to the component fixing structure in the first embodiment, the component fixing structure in the second embodiment includes a bottomed cylindrical portion 41 integrally formed on the bottom wall 33a of the electric connection box 33. Since it is not necessary to insert-mold the square bolt 32 in advance, the insert molding that complicates the molding die of the electric connection box 33 and increases the molding process becomes unnecessary.
The manufacturing cost can be reduced by simplifying the molding die of the electric connection box 33 and reducing the number of molding steps.

The bottomed cylindrical portion 41 has a square bolt 3
It is not necessary to penetrate through the bolt insertion hole through which the second shaft portion 32a is inserted, and the waterproofness of the electric connection box 33 can be ensured without using a sealing material.
This eliminates the need for a troublesome operation such as inserting the square bolt 32 from the back side of the bottom wall 33a to which is attached. Therefore, the electric connection box 33 is excellent in waterproofness and in assembling property of the fixed part 35.
Can be manufactured at low cost.

In each of the above embodiments, the holding fitting portion 41a formed on the bottom side of the deformable member accommodating portion 41b.
Has the same cross-sectional shape as the deformable member accommodating portion 41b, but the square nut 3 is attached to the holding fitting portion 41a on the bottom wall side.
7 or the head 32b of the square bolt 32 can be fitted, the deformable member accommodating portion 4 of the portion where the elastic strut 39 is fitted is inserted.
The cross-sectional shape of 1b does not necessarily have to match the cross-sectional shape of the square nut 37 or the head 32b.

For example, it is also possible to make the cross section of the deformable member accommodating portion 41b of the portion into which the elastic strut 39 is inserted into a circular shape, and to form the elastic strut 39 into a substantially cylindrical shape. Of course, the cross-sectional shapes of the deformable member accommodating portion 41b and the elastic struts 39 are as follows.
The shape is not limited to a square or a circle, but may be another polygon. Also, square nut 37 and square bolt 3
Instead of 2, a hexagon nut or a hexagon bolt can be used.

FIG. 4 is an exploded perspective view of a component fixing structure of an electric connection box according to a third embodiment of the present invention, and FIG. 5 is a longitudinal section showing an assembled state of a fixed component in the component fixing structure shown in FIG. FIG. The component fixing structure of the electric junction box according to the third embodiment includes, as shown in FIG.
The hexagonal bolt 52 penetrates the mounting portion 55a of the fixed component 55 incorporated in the electric connection box 34, the square nut 37 as a nut screwed to the shaft portion 52a of the hexagonal bolt 52, and the mounting portion 55a. A taper spring washer 59 as a compression deformable member which is fitted to the shaft portion 52a of the penetrated hexagon bolt 52 and tightens the hexagon bolt 52 and the square nut 37 to be elastically deformed in the radially expanding direction;
And a bottomed cylindrical portion 51 into which the tapered spring washer 59 is inserted and which has a holding fitting portion 51a into which the square nut 37 can be fitted in a non-rotatable manner. Further, the tapered spring washer 59 is interposed between the pair of flat washers 43.

The bottomed cylindrical portion 51 is provided with a tapered spring washer 59.
Has a circular shape, and therefore has a deformable member receiving hole 51b having a circular cross section.
On the bottom side of b, there is formed a holding fitting portion 51a having a square cross-sectional shape to which the square nut 37 can be fitted in a non-rotatable manner. The tapered spring washer 59 is a metal tapered spring washer formed in a frustoconical shape, and has a slit 59 extending in a radial direction so as to be easily expanded and deformed by a compressive load.
A part is cut off by a. Further, the outer peripheral edge 59b of the tapered spring washer 59 is knurled. However, the outer diameter of the tapered spring washer 59 is set so that it can be easily inserted into the deformable member accommodating portion 51b when not compressed.

Next, a procedure for assembling the fixed component 55 by the component fixing structure according to the third embodiment will be described. First, the square nut 37 is put into the deformable member accommodating portion 51b of the bottomed cylindrical portion 51 formed integrally with the bottom wall 34a of the electric connection box 34, and the square nut 37 is inserted into the holding fitting portion 51a.
After that, the flat washer 43, the tapered spring washer 59, and the flat washer 43 are sequentially inserted.

Next, the square nut 37 and the tapered spring washer 5
The fixed component 55 is placed on the bottomed cylindrical portion 51 in which
After the positioning of the mounting portion 55a, the shaft portion 52a of the hexagonal bolt 52 that has passed through the flat washer 43 and the tapered spring washer 59 together with the through hole of the mounting portion 55a is screwed into the square nut 37. When the head of the hexagonal bolt 52 is turned to tighten the shaft portion 52a to the square nut 37, the compressed taper spring washer 59 tends to expand and deform as shown in FIG. Since the outer peripheral edge is pressed against the inner peripheral wall of the deformable member accommodating portion 51b, the fixed component 55 is fixed to the bottom wall 34a of the electric connection box 34.

The square nut 37 is provided with a bottomed cylindrical portion 51.
Because it is fitted to the holding fitting portion 51 a and is prevented from rotating, it does not rotate with the tightening of the hexagonal bolt 52, and moves upward and parallel along the axis of the bottomed tubular portion 51. . The tapered spring washer 59 has a slit 59a extending in the radial direction, and the outer peripheral edge 59b is knurled. Therefore, the tapered spring washer 59 is easily expanded and deformed by a compressive load. Large friction can be applied to the inner peripheral wall.

Further, the flat washer 43 disposed below the tapered spring washer 59 uniformly transmits the force applied from the square nut 37 which moves upward in parallel with the tightening of the hexagon bolt 52 to the tapered spring washer 59. , The tapered spring washer 5
The flat washer 43 disposed above the tapered spring washer 5
9 has a function of uniformly transmitting the force acting from the mounting portion 9 to the mounting portion 55a.

Therefore, the component fixing structure according to the third embodiment is similar to the component fixing structure according to each of the above embodiments, in that the bottomed tubular portion 51 integrally formed on the bottom wall 34a of the electric connection box 34 has The square nut 37 does not need to be insert-molded, and insert molding, which leads to complication of a mold for forming the electric connection box 34 and an increase in the number of molding steps, becomes unnecessary.
The manufacturing cost can be reduced by simplifying the molding die of the electric connection box 34 and reducing the number of molding steps.

The bottomed cylindrical portion 51 has a hexagon bolt 5
There is no need to form a bolt insertion hole through which the second shaft portion 52a is inserted, and the waterproofness of the electric connection box 34 can be ensured without using a sealing material, and the fixed component 55 can be secured.
This eliminates the need for complicated work such as inserting the hexagonal bolt 52 from the back side of the bottom wall 34a to which is attached. Therefore, the electric connection box 34 having excellent waterproofness and assemblability of the fixed parts 55 is excellent.
Can be manufactured at low cost.

In the case of the third embodiment, the slit 59a is formed in the tapered spring washer 59 so that the taper spring washer can be easily elastically deformed in the radially expanding direction by a compressive load, and its outer peripheral edge 59b is formed.
By applying knurling to the inner peripheral wall of the deformable member accommodating portion 51b so as to easily exert a large friction, a sufficient fixing force can be obtained even when the attachment and detachment are repeated. However, in the case where the fixed component 55 does not repeatedly attach / detach to / from the electrical connection box 34, that is, in the case of a so-called fitting-kill, the tapered spring washer 59 is used.
The hexagonal bolt 52 can be fastened to the square nut 37 until the outer peripheral edge of the hexagon bolt bites into the inner peripheral wall of the deformable member accommodating portion 51b.

The frusto-conical tapered spring washer according to the present invention does not necessarily need a slit 59a along a radius like the tapered spring washer 59 in the above-described embodiment. Thereby, elastic deformation can be easily performed in the radially expanding direction. It goes without saying that a hexagonal nut can be used instead of the square nut 37 in the above embodiment. Furthermore, in each of the above embodiments, the bottomed cylindrical portion is formed on the bottom wall of the electric connection box, but the present invention is not limited to this.
It can also be integrally formed with other parts of the electric junction box such as a side wall and a cover.

[0037]

According to the component fixing structure of the electric junction box of the present invention, the head or nut of the bolt is fitted to the holding fitting portion in the bottomed cylindrical portion integrally formed with the electric junction box, and the shaft is By tightening the bolts and nuts whose parts penetrate the mounting portion of the fixed component and the compression deformable member, the compression deformable member is expanded and deformed. Then, the outer peripheral portion of the compression-deformed member whose diameter has been deformed is pressed against the inner peripheral wall of the bottomed cylindrical portion, whereby the fixed component is fixed to the electric connection box.

Therefore, it is not necessary to insert-mold a nut in advance into the bottomed cylindrical portion integrally formed with the electric junction box, and insert molding which causes a complicated mold for the electric junction box and an increase in the molding process is required. Since it becomes unnecessary, the manufacturing cost can be reduced by simplifying the molding die of the electric connection box and reducing the number of molding steps. Further, it is not necessary to form a bolt insertion hole through which a bolt is inserted in the bottomed cylindrical portion, and it is possible to ensure waterproofness of the electric junction box without using a sealing material and to attach a fixed component. There is no need for complicated work such as inserting bolts from the back side of the electrical junction box. Therefore, it is possible to inexpensively manufacture an electric junction box having excellent waterproofness and assemblability of a fixed part.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a component fixing structure of an electric junction box according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a procedure for assembling a fixed component in the component fixing structure shown in FIG. 1;

FIG. 3 is an explanatory diagram of a procedure for assembling a component to be fixed in a component fixing structure of an electric junction box according to a second embodiment of the present invention.

FIG. 4 is an exploded perspective view of a component fixing structure of an electric junction box according to a third embodiment of the present invention.

5 is a longitudinal sectional view showing an assembled state of a fixed component in the component fixing structure shown in FIG. 4;

FIG. 6 is a perspective view of an electric junction box provided with a component fixing portion according to a conventional component fixing structure.

7 is an exploded perspective view of a component fixing structure of the electric junction box shown in FIG.

FIG. 8 is a longitudinal sectional view showing a main part of another conventional structure for fixing a component of an electric junction box.

[Explanation of symbols]

 Reference Signs List 31 bolt 31a shaft portion 33 electric connection box 35 fixed part 35a mounting portion 37 square nut 39 elastic support 41 bottomed cylindrical portion 41a holding fitting portion 41b deformable member housing portion

Claims (3)

[Claims] 1. A bolt having a shaft portion passing through a mounting portion of a part to be fixed fixed to an electric junction box; a nut screwed into the shaft portion of the bolt; A compression deformation member that deforms in the radially expanding direction when the bolt and the nut are tightened; and a holding fitting portion that is integrally formed with the electric connection box and that can fit the head of the bolt or the nut in a non-rotatable manner. A component fixing structure for an electric connection box having a bottomed tubular portion into which the compression deformable member is inserted, wherein the bolt and the nut are tightened to expand and deform the compression deformable member. A component fixing structure for an electric connection box, wherein an outer peripheral portion of the component is pressed against an inner peripheral wall of the bottomed cylindrical portion to fix the fixed component to an electric connection box. 2. The electric device according to claim 1, wherein the compression-deformable member is formed of a tubular elastic support pillar that penetrates a shaft portion of the bolt and that fits into the bottomed tubular portion. Connection box component fixing structure. 3. The compression-deformable member is formed by a truncated cone-shaped tapered spring washer that penetrates a shaft portion of the bolt and has an outer peripheral edge facing the inner peripheral wall of the bottomed cylindrical portion. Item 2. A component fixing structure for an electric connection box according to Item 1.