JP2011250497A - Electric wire insertion structure of electric equipment storage box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric wire insertion structure of an electric equipment storage box, which prevents loss of film tension and loss of a waterproof effect of the film even when an electric wire of a cable is inserted or a screw is fastened.SOLUTION: The electric wire insertion structure of an electric equipment storage box seals an opening part 2 of the electric equipment storage box using a film part 3 having an electric wire insertion part 5 for inserting an electric wire or a cable, and a first component 10 having a through hole for holding the periphery of the film part 3. In the first component 10, a rising piece 14 or a groove is formed in an opening direction of the electric equipment storage box, and a groove 7 or a rising piece corresponding the rising piece 14 or the groove is formed on the periphery 4 of the film part 3 so as to be engaged with each other and is attached to the opening part 2 of the electric equipment storage box. The periphery 4 of the film part 3 may be inserted between the first component 10 and a second component 20.

Description

  The present invention relates to a wire insertion structure in which a membrane member is attached to an opening of an electric equipment storage box.

  The electrical equipment storage box has an opening for entering and exiting wires and cables, but if left as it is, water entered from the opening or occurred when the opening was punched out. Wire coating may be broken by burrs. For this reason, an electric wire insertion structure called a grommet has been conventionally used for the opening of the electrical equipment storage box.

  Such a wire insertion structure called a grommet is one in which the attachment part to the opening is integrally formed at the periphery of the film part having the wire insertion part for inserting the electric wire or cable, but once it has been used And if you fail in incoming and outgoing lines, you have to replace the whole.

  Therefore, Patent Document 1 and Patent Document 2 propose an electric wire insertion structure having a structure in which a film portion is sandwiched by a fixing frame and fixed to an opening. However, even in these structures, since the film part is pulled when it is fixed to the opening with a screw, the film part may protrude from the fixing frame, and the tension of the film part is lost and the waterproof performance may be impaired. there were.

Japanese Patent Laid-Open No. 5-282951 JP 2009-296784 A

  Accordingly, the object of the present invention is to solve the above-described conventional problems, and to provide an electrical equipment storage box that does not impair the tension and waterproofing effect of the membrane even when an electric wire or cable is inserted or a screw is tightened. It is to provide a wire insertion structure.

  The present invention made in order to solve the above-mentioned problems is an electric device using a film part having an electric wire insertion part for inserting an electric wire or a cable, and a first member having a through hole and holding the periphery of the film part. In the electric wire insertion structure of the electric device storage box that closes the opening of the storage box, a rising piece or a groove is formed in the first member in the opening direction of the electric device storage box, and the peripheral portion of the film portion is Corresponding grooves or rising pieces are formed and engaged with each other so that they can be attached to the opening of the electric equipment storage box.

  Moreover, it can be set as the structure provided with the 2nd member which has a through-hole like Claim 2 and pinches | interposes the peripheral part of a film | membrane part between 1st members. A rising piece or a groove portion is formed in the opening direction of the two members, and a groove portion or a rising piece corresponding to the rising piece is formed on the peripheral edge portion of the film portion, and both are engaged with each other. Furthermore, as in claim 4, a structure may be provided that includes a third member that fixes the first member to the opening of the electric equipment storage box. The first member includes a flange portion extending along the outer peripheral surface, a central through hole and a rising piece formed in the flange portion, and a cylindrical portion inserted into the opening portion. A cylindrical portion is fitted from the outer surface side of the electrical device storage box, and a third member formed by a ring is screwed onto the outer peripheral surface of the cylindrical portion of the first member from the inner surface side of the electrical device storage box. A substantially cylindrical second member having a through-hole in the center is fixed from the inner surface of the first member from the inner surface of the first member, and the membrane portion is the first. It can also be set as the structure fixed by being inserted between a member and the 2nd member, and it has the 3rd member which fixes the 2nd member to the opening of an electric equipment storage box like Claim 6. It can also be made into a structure.

  Moreover, it is preferable to form the peripheral part of a film part thicker than an electric wire insertion part like Claim 7, and formed the uneven | corrugated slip prevention part in the peripheral part of the film part like Claim 8. A structure is preferable.

  The electric wire insertion structure of the electrical equipment storage box according to the present invention causes the membrane portion to be electrically connected by engaging the rising piece or the groove formed on the first member with the groove or the rising piece formed on the peripheral edge of the membrane. Since the structure is attached to the opening of the equipment storage box, the membrane is securely held even when wires or cables are inserted or screws are tightened, so that the tension of the membrane can be kept stable. At the same time, the waterproof effect can be stabilized.

  Moreover, if it is set as the structure provided with the 3rd member which fixes a 1st member or a 2nd member to the opening part of an electric equipment storage box like Claim 4 and Claim 6, replacement | exchange of a film part will be performed easily. It becomes possible. The first member includes a flange portion extending along the outer peripheral surface, a central through hole and a rising piece formed in the flange portion, and a cylindrical portion inserted into the opening portion. A cylindrical portion is fitted from the outer surface side of the electrical device storage box, and a third member formed by a ring is screwed onto the outer peripheral surface of the cylindrical portion of the first member from the inner surface side of the electrical device storage box. A substantially cylindrical second member having a through-hole in the center is fixed from the inner surface of the first member from the inner surface of the first member, and the membrane portion is the first. If the structure is sandwiched and fixed between the member and the second member, it is possible to easily replace the membrane part simply by removing the second member.

  Further, if the peripheral portion of the film part is formed thicker than the wire insertion part as in claim 7, the engagement between the rising piece or groove formed in the first member and the film part is more reliable. In addition to being able to be firmly performed, the film portion is not caught and damaged when screwing.

  Further, according to the eighth aspect of the present invention, if a structure in which the uneven slip prevention portion is formed at the peripheral portion of the film portion, troubles such as detachment due to slippage of the film portion can be solved.

1 is an exploded perspective view showing a first embodiment of the present invention. It is a section perspective view showing just before attachment of a 1st embodiment of the present invention. It is sectional drawing which shows the 1st Embodiment of this invention. It is an expanded sectional view of the principal part. It is a perspective view which shows the 2nd Embodiment of this invention. It is a disassembled perspective view which shows the 3rd Embodiment of this invention. It is sectional drawing which shows the 3rd Embodiment of this invention. It is an expanded sectional view of the principal part. It is a disassembled perspective view which shows the 4th Embodiment of this invention. It is sectional drawing which shows the 4th Embodiment of this invention. It is principal part explanatory drawing corresponding to Claim 1. FIG. It is principal part explanatory drawing corresponding to Claim 2 and Claim 3. FIG. It is sectional drawing which shows the 5th Embodiment of this invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
1 to 4 are views showing a first embodiment of the present invention, wherein 1 is a wall surface of an electric equipment storage box, and 2 is an opening for inserting an electric wire or cable formed on the wall surface 1. is there. In this embodiment, the opening 2 is a circular hole. Reference numeral 3 denotes a circular film portion attached to the opening 2, which is made of rubber or an olefin-based thermoplastic elastomer, and is tightened so as to become familiar with the shape of the electric wire even after the electric wire is inserted, thereby improving the waterproof property. Even materials other than those described above may be used as long as they have high waterproof properties. As shown in FIG. 1, a thick peripheral edge 4 is formed around the film part 3. An electric wire insertion portion 5 through which an electric wire or a cable is inserted is formed at the central portion of the membrane portion 3. The wire insertion portion 5 is formed with a thin portion for facilitating the insertion of an electric wire or the like. When a large number of electric wires are allowed to pass, it is preferable that the thin portions are uniformly formed. As shown in FIG. 1, in this embodiment, the membrane portion 3 is attached to the opening 2 by a packing 6, a first member 10, a second member 20, and a third member 30. The first member 10, the second member 20, and the third member 30 are all resin molded products.

  The first member 10 includes a flange portion 11 that extends along the outer peripheral surface of the opening 2, a through hole 12 formed in the center portion thereof, and a cylindrical portion 13 that is inserted into the opening 2. As shown in FIGS. 2 to 4, an annular rising piece 14 is formed on the inner peripheral portion of the flange portion 11 in the opening direction (axial direction) of the electric device storage box. A groove 7 is formed on the peripheral edge 4 of the film 3 so as to correspond to the annular rising piece 14, and the film 3 is securely held by the first member 10 by engaging both. . That is, the film part 3 is clamped by the first member 10 and a second member 20 described later, and the rising piece 14 of the first member 10 is fitted into the groove part 7 of the film part 3. And since the 2nd member 20 mentioned later presses the film | membrane part 3 against the 1st member 10, even if an electric wire etc. are inserted, the film | membrane part 3 will not slip | deviate and a waterproof performance will also be improved. In contrast to this embodiment, it is also possible to provide a rising piece on the film part 3 side and form a groove part on the first member 10 side. A male screw 15 is formed on the outer peripheral surface of the cylindrical portion 13 of the first member 10, and a female screw 16 is formed on the inner peripheral surface.

  The second member 20 has a substantially cylindrical shape having a through-hole 21 in the center, and an external screw 22 corresponding to the female screw 16 and a wire insertion hole 24 are formed on the outer peripheral surface thereof. A small-diameter portion 23 that supports the inner surface of the film portion 3 is formed at the distal end portion of the second member 20. As shown in FIGS. 2 and 3, the second member 20 is screwed into the first member 10 from the inner surface side of the electric equipment storage box. The peripheral edge 4 of the film part 3 is sandwiched and fixed between the first member 10 and the second member 20. The electric wire insertion hole 24 has a role of holding the electric wire by directly inserting the electric wire or passing the binding band.

  The third member 30 is a ring provided with a female screw 31 on the inner peripheral surface, and is screwed into the external screw 15 formed on the outer peripheral surface of the cylindrical portion 13 of the first member 10 from the inner surface side of the electric device storage box. Is done. As shown in FIGS. 2 and 3, the inner peripheral end of the opening 2 of the electrical equipment storage box is sandwiched from both the front and back sides by the flange portion 11 of the first member 10 and the third member 30. 2 can be firmly fixed. A recess 32 is formed on the outer periphery of the third member 30 to assist rotation.

  In addition, if it is set as the structure which formed the uneven | corrugated slip prevention part 8 in the peripheral part 4 of the film | membrane part 3 as shown in FIG. 4, the friction of a contact part with the standing piece 14 of the 1st member 10 will become large, When the second member 20 is screwed to the first member 10, the effect that the membrane portion 3 slips off and the trouble that the membrane portion 3 is pulled by being pulled when the electric wire is inserted is more reliably prevented can be obtained. Can do. In this embodiment, the uneven slip preventing portion 8 formed on the peripheral edge portion 4 of the film portion 3 is formed at the contact portion with the first member 10. Of course, it may be formed at the contact portion. Of course, the uneven slip prevention portion 8 may be formed not on the peripheral edge 4 side of the film portion 3 but on the first member 10 or the second member 20 side.

  The packing 6 is a member that is sandwiched between the first member 10 and the wall surface 1 of the electric device storage box to enhance waterproof performance. In addition to the waterproof effect, the packing 6 also has an effect of preventing slipping when the first member 10 is fixed and enabling a strong attachment. The packing 6 has a larger inner diameter than the cylindrical portion 13 of the first member 10.

  In order to assemble the first embodiment configured as described above, first, the packing 6 is passed through the outer periphery of the cylindrical portion 13 of the first member 10 and then fitted into the opening 2 from the outside, and the third member 30 is attached. It is screwed into the external thread 15 of the outer peripheral surface of the first member 10 from the inside, and rotational tightening is performed. Thereafter, or prior to that, the membrane portion 3 is inserted into the opening portion 2 from the inside, and the second member 20 is screwed into the internal thread 16 on the inner peripheral surface of the first member 10, and the membrane is interposed between the first member 10 and the membrane. The rising piece 14 presses and fixes the membrane portion 3 with the peripheral edge portion 4 of the portion 3 interposed therebetween. At this time, when the rising piece 14 of the first member 10 is engaged with the groove portion 7 of the peripheral edge portion 4 of the film portion 3, the strong attachment can be achieved.

  Thus, it is not necessary to form a screw hole around the wall surface 1, and attachment is possible without using a tool. Moreover, since the 3rd member 30 is not exposed to the outer surface side of an electric equipment storage box, it is not removed by mischief and an external appearance is also good. Furthermore, when it is desired to replace the membrane part 3, it is only necessary to remove the second member 20, and it is not necessary to remove the whole.

  FIG. 5 is a perspective view showing a second embodiment of the present invention, in which a plurality of small through holes 12 and cylindrical portions 13 are formed in the first member 10. In this way, if the cylindrical portion 13 is reduced in size to be plural, when there is no change in the electric wire, a large number of electric wires of one membrane portion 3 are passed through, and when the electric wire is attached and removed many times, It is possible to selectively use the wires to be removed, for example, by passing them through one membrane portion 3.

  FIG. 6 and subsequent figures are exploded perspective views showing a third embodiment of the present invention, FIG. 7 is a sectional view, and FIG. 8 is an enlarged sectional view of an essential part. In the third embodiment, the opening 2 of the wall surface 1 is substantially rectangular, and the film part 3, the first member 10, and the second member 20 are all rectangular. The first member 10 and the second member 20 of this embodiment are both made of metal.

  The first member 10 includes a flat portion 17 that covers the front surface of the opening 2, and a rising piece 18 that extends from the end portion in the opening direction (axial direction) of the electric device storage box. The rising piece 18 is engaged with the groove portion 7 of the film portion 3. A plurality of screw holes 19 are formed in the first member 10. These screw holes 19 are formed inside the opening 2.

Although the film part 3 of this embodiment is attached from the outside of the opening 2, it may be attached from the inside. The peripheral edge portion 4 of the film portion 3 is thicker than the central wire insertion portion 5, and the groove portion 7 is formed at a position corresponding to the rising piece 18 of the first member 10. By forming the peripheral edge part 4 of the film part 3 thickly, the groove part 7 corresponding to the rising piece 18 formed in the first member 10 can be deeply provided, and the first member 10 and the film part 3 Engagement can be performed more securely and securely, and the film part 3 is not caught and damaged when screwing.
Further, similarly to the first member 10, a screw hole 19 is formed. As shown in FIG. 8, an uneven slip prevention portion 8 is formed on the contact surface of the peripheral edge portion 4 of the membrane portion 3 with the wall surface 1 of the electric device storage box.

  The second member 20 is also rectangular, and a screw hole 25 is formed at a position corresponding to the screw hole 19 on the tip surface. Moreover, the electric wire penetration hole 24 is formed in the frame part 25 of the 2nd member 20, and an electric wire can be hold | maintained by inserting an electric wire directly or passing a binding band.

  The thing of such a structure first fixes the 1st member 10 to the front surface of the film | membrane part 3, and presses it to the opening part 2. FIG. Further, the second member is pressed from the back surface of the opening 2, the screw 40 is screwed into the screw hole 19 and the screw hole 25 from the first member 10 side, and the peripheral edge 4 of the film portion 3 is first as shown in FIG. The member 10 and the second member 20 are sandwiched and fixed. In such a structure, since the rising piece 18 presses and fixes the membrane portion 3, the membrane portion 3 does not shift even when an electric wire or the like is inserted, and the screw 40 holds the membrane portion 3 when screwing. The film portion will not be displaced by being caught. In addition, the screw hole 19 and the screw hole 25 may be threaded, or may be one in which the screw 40 is fixed using a nut.

  Also in the third embodiment, the rising piece 18 of the first member 10 is engaged with the groove portion 7 of the membrane portion 3 to hold the membrane portion 3, so that the membrane portion 3 can be inserted even when the electric wire is inserted. There is no loss of tension, and a waterproof electric wire insertion structure can be obtained. Further, since the screwing is performed inside the opening 2, it is not necessary to form a screw hole around the wall surface 1.

  9 and 10 are diagrams showing a fourth embodiment of the present invention. This embodiment is basically the same as the third embodiment, except that the screw 40 is screwed from the inside. With such a structure, the screw 40 is not exposed to the outside of the electric device storage box, and therefore is not removed by mischief.

  As another example, the fifth embodiment is a modification of the first embodiment of the present invention shown in FIGS. 1 to 4, and the second member 20 is moved from the outer surface side of the electric equipment storage box as shown in FIG. 13. The first member into which the membrane portion 3 is inserted is inserted into the outer peripheral surface of the cylindrical portion of the second member 20 from the inside of the electric device storage box by the third member 30 and fixed to the opening of the electric device storage box. The member 10 is fixed by being screwed onto the outer peripheral surface of the cylindrical portion of the second member 20 from the outer surface side of the electric device storage box. That is, in the first embodiment of FIGS. 1 to 4, the first member 10 is fixed by the third member 30, but the second member 20 is fixed by the third member 30 as shown in FIG. 13. Such a shape may be used. Also in this configuration, the film part 3 is clamped by the first member 10 and the second member 20 described later, and when replacing the film part 3, only the first member may be removed. In addition, in the shape mentioned above, although fitting of the 1st component 10, the 2nd member 20, and the 3rd member 30 is described as the inner surface side or the outer surface side of the electric equipment storage box, it is not limited to the shape. There is nothing.

  As described above, in the electric wire insertion structure for the electric device storage box of the present invention, the first member 10 is formed with a rising piece or a groove portion in the opening direction of the electric device storage box, and the peripheral edge of the film portion 3 Since the groove 4 or the rising piece corresponding to this is formed in the part 4 and both are engaged, the film part 3 is securely held even if an electric wire or cable is inserted or a screw is tightened. 11 to 12 are enlarged views of this portion. In FIG. 11 corresponding to claim 1, the first member 10 is engaged with the rising piece 14 of the first member 10 in the groove portion 7 of the film portion 3. The screw 40 is inserted into the screw hole provided in the membrane portion 3 from the first member 10 side and fixed to the wall surface 1 of the electrical storage box, or the screw 40 is inserted and attached with the nut from the inside of the electrical equipment storage box. ing. In FIG. 12 corresponding to claim 2 and claim 3, the rising piece 14 of the first member 10 is engaged with the groove portion 7 of the membrane portion 3, and the membrane is interposed between the first member 10 and the second member 20. The rising piece 29 is also provided on the second member 20 with the peripheral edge portion 4 of the portion 3 interposed therebetween, and is engaged with the groove portion on the back surface side of the film portion 3. As in FIG. 11, the screw 40 is inserted into the screw hole provided in the first member 10, the membrane portion 3, and the second member 20 from the first member 10 side and screwed to the wall surface 1 of the electrical storage box, or the screw 40. Is inserted from the inside of the electrical equipment storage box with a nut.

DESCRIPTION OF SYMBOLS 1 Wall surface of electrical equipment storage box 2 Opening part 3 Film | membrane part 4 Peripheral part 5 Electric wire insertion part 6 Packing 7 Groove part 8 Slip prevention part 10 1st member 11 Flange part 12 Through-hole 13 Cylindrical part 14 Standing piece 15 Male thread 16 Female screw 17 Flat portion 18 Standing piece 19 Screw hole 20 Second member 21 Through hole 22 Male screw 23 Small diameter portion 24 Electric wire insertion hole 25 Screw hole 30 Third member 31 Female screw 32 Recess 40 Screw

Claims (8)

  An electrical equipment storage box that closes an opening of an electrical equipment storage box using a membrane portion having an electrical wire insertion portion through which an electric wire or cable is inserted and a first member that has a through hole and holds the periphery of the membrane portion In the wire insertion structure, a rising piece or a groove is formed in the first member in the opening direction of the electric device storage box, and a groove or a rising piece corresponding to the rising piece is formed on the peripheral edge of the film portion to engage the both. An electric wire insertion structure for an electric equipment storage box, wherein the electric equipment storage box is attached to an opening of the electric equipment storage box.   2. The electric wire insertion structure for an electric equipment storage box according to claim 1, further comprising a second member having a through-hole and sandwiching the peripheral edge portion of the film portion with the first member.   3. A rising piece or a groove portion is formed in the opening direction of the second member, and a groove portion or a rising piece corresponding to the rising piece is formed on the peripheral portion of the film portion to engage the both. The electric wire insertion structure of the electrical equipment storage box of description.   4. The electric wire insertion structure for an electric equipment storage box according to claim 2, further comprising a third member for fixing the first member to an opening of the electric equipment storage box.   The first member includes a flange portion extending along the outer peripheral surface, a through hole and a rising piece in the center portion formed in the flange portion, and a cylindrical portion inserted into the opening portion, and an electric equipment storage box The cylindrical portion is fitted from the outer surface side of the first member, and the third member formed by the ring is screwed into the outer peripheral surface of the cylindrical portion of the first member from the inner surface side of the electric device storage box, so that the opening of the electric device storage box is opened. The substantially cylindrical second member having a through-hole in the center is screwed from the inner peripheral surface of the first member from the inner surface side of the electric equipment storage box, and the membrane portion is between the first member and the second member. An electric wire insertion structure for an electric equipment storage box according to claim 4, which is fixed by being sandwiched between the electric equipment storage boxes.   4. The electric wire insertion structure for an electric equipment storage box according to claim 2, further comprising a third member for fixing the second member to an opening of the electric equipment storage box.   The electric wire insertion structure for an electric equipment storage box according to any one of claims 1 to 4, wherein the peripheral portion of the film portion is formed thicker than the electric wire insertion portion.   6. The electric wire insertion structure for an electric equipment storage box according to claim 5, wherein an uneven slip prevention portion is formed at a peripheral edge portion of the film portion.