JP5541969B2 - Electric wire insertion structure for electrical equipment storage box - Google Patents

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 to solve the above problems includes a membrane part having an electric wire insertion part through which an electric wire or a cable is inserted, a first member having a through hole and holding the peripheral edge of the membrane part, and the through hole. In the electric wire insertion structure of the electric device storage box, the second member includes a second member that sandwiches the peripheral portion of the film portion between the first member and the third member, and closes the opening of the electric device storage box. A rising piece or groove is formed on the member in the opening direction of the electric device storage box, and a corresponding groove or rising piece is formed on the peripheral portion of the membrane portion to engage both of them to store the electric device. It is a structure attached to the opening of the box ,
Further, 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 for storing electric equipment. The cylindrical portion is fitted from the outer surface side of the box, 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 to open the opening of the electric device storage box The substantially cylindrical second member having a through-hole in the center is screwed from the inner surface of the electric device storage box from the inner peripheral surface of the first member, and the membrane portion is formed by the first member and the second member. It is characterized by a structure that is sandwiched between and fixed .

Further, the invention of claim 2 made to solve the above-mentioned problem is a film part having an electric wire insertion part for inserting an electric wire or a cable, a first member having a through hole and holding the periphery of the film part, An electric wire insertion structure for an electric equipment storage box that includes a second member that has a through-hole and sandwiches the peripheral portion of the membrane portion with the first member, and a third member, and closes the opening of the electric equipment storage box In the first member, a rising piece or a groove portion is formed in the opening direction of the electric equipment storage box, and a corresponding groove portion or a rising piece is formed on the peripheral portion of the film portion to engage the two, It is a structure attached to the opening of the electrical equipment storage box,
Furthermore, the third member has a structure in which the second member is fixed to the opening of the electric device storage box.

As in claim 3, a rising piece or a groove is formed in the opening direction of the second member, and a groove or a rising piece corresponding to the rising piece is formed on the peripheral portion of the film portion to engage the both. Structure. Moreover, it is preferable to form the peripheral part of a film part thicker than an electric wire penetration part like Claim 4 , and formed the uneven | corrugated slip prevention part in the peripheral part of the film part like Claim 5 . 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.

In addition, since the third member for fixing the first member or the second member to the opening of the electrical equipment storage box is provided , the membrane portion can be easily replaced . The first member of claim 1 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, The cylindrical portion is fitted from the outer surface side of the electrical device storage box, and the third member formed by the ring is screwed from the inner surface side of the electrical device storage box to the outer peripheral surface of the cylindrical portion of the first member to store the electrical device. A substantially cylindrical second member having a through hole in the center is fixed from the inner surface of the first member housing from the inner surface of the first member, and the membrane portion is connected to the first member and the first member. since the structure is fixed interleaved between the two members, it is possible to easily exchange only membrane unit detaching the second member.

Further, if the peripheral portion of the film part is formed thicker than the wire insertion part as in claim 4 , 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 fifth 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 sectional drawing which shows embodiment of invention of Claim 2.

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.

Next, FIG. 6 shows an embodiment of the invention of claim 2. This is a modification of the first embodiment of the present invention shown in FIGS. 1 to 4, and the second member 20 is fitted from the outer surface side of the electric device storage box as shown in the figure , and the third device 30 is used to store the electric device storage box. The first member 10 into which the membrane portion 3 is inserted is screwed into the outer peripheral surface of the cylindrical portion of the second member 20 from the inner side of the second member 20 and fixed to the opening of the electric device storage box from the outer surface side of the electric device storage box. The second member 20 is fixed to the outer peripheral surface of the cylindrical portion by screwing. 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 .

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 (5)

A membrane part having an electric wire insertion part for inserting an electric wire or a cable, a first member having a through hole and holding the periphery of the film part, and a peripheral part of the film part between the first member having a through hole In the electric wire insertion structure of the electric device storage box that includes the second member to be sandwiched and the third member and closes the opening of the electric device storage box, the first member has a rising piece in the opening direction of the electric device storage box Or a groove part is formed, and a peripheral part of the film part is formed with a corresponding groove part or a rising piece to engage both, and attached to the opening part of the electrical equipment storage box ,
Further, 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 for storing electric equipment. The cylindrical portion is fitted from the outer surface side of the box, 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 to open the opening of the electric device storage box The substantially cylindrical second member having a through-hole in the center is screwed from the inner surface of the electric device storage box from the inner peripheral surface of the first member, and the membrane portion is formed by the first member and the second member. An electric wire insertion structure for a box for storing electric equipment, characterized in that it is sandwiched between and fixed . A membrane part having an electric wire insertion part for inserting an electric wire or a cable, a first member having a through hole and holding the periphery of the film part, and a peripheral part of the film part between the first member having a through hole In the electric wire insertion structure of the electric device storage box that includes the second member to be sandwiched and the third member and closes the opening of the electric device storage box, the first member has a rising piece in the opening direction of the electric device storage box Or a groove part is formed, and a peripheral part of the film part is formed with a corresponding groove part or a rising piece to engage both, and attached to the opening part of the electrical equipment storage box,
Further, the third member has a structure in which the second member is fixed to the opening of the electric device storage box. The rising piece or grooves formed in the opening direction of the second member, the claims in the periphery of the film portion, characterized in that engaged both by forming a groove or rising piece corresponding thereto 1 Or the electric wire penetration structure of the electric equipment storage box of 2 . The electric wire insertion structure for an electric equipment storage box according to any one of claims 1 to 3, wherein the peripheral portion of the film portion is formed thicker than the electric wire insertion portion . 5. The electric wire insertion structure for an electric equipment storage box according to claim 4, wherein an uneven slip prevention portion is formed on a peripheral edge portion of the film portion .