JP2005142472A - Waterproof construction of penetrating portion for electric wire in housing of electrical equipment - Google Patents

Waterproof construction of penetrating portion for electric wire in housing of electrical equipment Download PDF

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Publication number
JP2005142472A
JP2005142472A JP2003379636A JP2003379636A JP2005142472A JP 2005142472 A JP2005142472 A JP 2005142472A JP 2003379636 A JP2003379636 A JP 2003379636A JP 2003379636 A JP2003379636 A JP 2003379636A JP 2005142472 A JP2005142472 A JP 2005142472A
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Japan
Prior art keywords
equipment storage
storage box
gasket
waterproof structure
electrical equipment
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JP2003379636A
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Japanese (ja)
Inventor
Mitsuaki Murota
Shiro Yasuyoshi
志朗 安吉
満秋 室田
Original Assignee
Nippon Sharyo Seizo Kaisha Ltd
Yutaka Seisakusho:Kk
日本車輌製造株式会社
株式会社ユタカ製作所
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Application filed by Nippon Sharyo Seizo Kaisha Ltd, Yutaka Seisakusho:Kk, 日本車輌製造株式会社, 株式会社ユタカ製作所 filed Critical Nippon Sharyo Seizo Kaisha Ltd
Priority to JP2003379636A priority Critical patent/JP2005142472A/en
Publication of JP2005142472A publication Critical patent/JP2005142472A/en
Pending legal-status Critical Current

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Abstract

The present invention provides a waterproof structure for an electric wire penetrating portion in an electrical equipment storage box with reduced manufacturing and maintenance costs and improved waterproof performance.
A plurality of annular rings are formed on an inner peripheral surface between a cable holder and a gasket retainer having a round hole having a stepped portion at one end of an inner diameter connected to an electrical equipment storage box. A cylindrical gasket 5 having ribs formed at substantially equal intervals in the axial direction and at least one annular rib formed in the middle in the axial direction is mounted on the outer peripheral surface. Further, the gasket holder 4 can be prevented from falling off by providing a slit in the circumferential direction on the side opposite to the connection side and attaching a binding band.
[Selection] Figure 1

Description

  The present invention relates to a waterproof structure for an electric wire penetrating portion in an electric equipment storage box that is mainly attached under the floor of a railway vehicle.

  Railroad vehicles are equipped with various electrical devices, but those that can be installed under the floor are housed in metal boxes such as steel plates, stainless steel plates, and aluminum, and are designed to be waterproof and dustproof as the lid closes. It is normal. The electrical wiring connected to the internal equipment needs to penetrate this box. It is common to attach a terminal for connection to the end of the electric wire, and let the cable form penetrate through the back side of the box. FIG. 7 is a perspective view showing the back side of an example of such a box. 1 is an electric equipment storage box (hereinafter sometimes referred to as “box”), 10 is a cut hole on the back surface, and C is a cut hole 10. A penetrating cable, T, is a terminal attached to the end of the cable. The box 1 must be provided with a cut hole 10 larger than the diameter of the cable C because it is necessary to insert and remove the terminal T portion. Apply a sealant to the joint surface and seal. FIG. 8 is a perspective view showing the back side of the box in a complete installation state, 8 is a cleat, 81 is a sewing bolt for connecting the upper and lower cleats, 82 is a mounting bolt for fixing the combined cleat to the box 1, and S is a sealing material. is there.

  On the other hand, Patent Document 1 describes a waterproof cylindrical gasket used for a cable lead-out portion in an electrical connector used at a connection portion of electrical wiring or electrical equipment. FIG. 9 is a side view showing a partial cross section of the socket 9 of the electrical connector paired with the socket and the plug. 91 is a substantially cylindrical casing made of metal which is an outer portion of the socket 9, and 92 is inside thereof. An inserted insulating base 93 is a conductor socket contact attached inside through the insulating base 92, and 5 is a waterproofing insert inserted between the cable C connected to the socket contact 93 and the casing 91. A cylindrical gasket 94 is a fastening gland for fastening it.

  FIG. 10 is a side view showing a partial cross section of the cylindrical gasket 5 according to the invention described in Patent Document 1. 51 is an annular rib formed on the inner peripheral surface, and 52 is an annular rib formed on the outer peripheral surface. It is. Although not shown in particular, the usage state of the cylindrical gasket is the same as that of the mating plug.

The cylindrical gasket 5 is made of synthetic rubber and is also called “grommet”. As shown in FIG. 9, the inner peripheral surface and the outer peripheral surface are in contact with the outer peripheral surface of the cable C and the inner peripheral surface of the casing 91, respectively, and exhibit waterproof performance by being crushed. In the inner circumferential surface, a plurality of annular ribs 51 are formed at substantially equal intervals in the axial direction, and at least one annular rib 52 is formed in the middle in the axial direction on the outer circumferential surface. When the thickness of the cross section of 52 is t and the protrusion length is h, the ratio of h / t is preferably 1.5 or more and 6.0 or less.
JP 2002-184515 A

  The conventional techniques described with reference to FIGS. 7 and 8 have the following problems.

  First, it takes a long time to assemble and attach the cleat, and requires a drying time after applying the sealing material.

  Second, recent high-speed trains and other reasons have revealed that atmospheric pressure fluctuations that could not have been predicted in the past, such as when passing in tunnels, are not sufficient with conventional waterproof structures. It has come to be considered.

  An object of the present invention is to solve such problems in the prior art, and to realize a waterproof structure for an electric wire penetrating portion in an electrical equipment storage box that is reduced in cost and improved in waterproof performance.

  The present invention is a waterproof structure for an electric wire penetration portion in an electric equipment storage box, and is tubular between an fitting body connected to the electric equipment storage box without a gap and a cable passing through the electric equipment storage box. A waterproof structure for an electric wire penetrating portion in an electrical equipment storage box, characterized in that a gasket is mounted. Preferably, the cylindrical gasket has a plurality of annular ribs formed on the inner peripheral surface at substantially equal intervals in the axial direction. The waterproof structure of the electric wire penetration part in the electric equipment storage box, wherein the outer peripheral surface is formed with at least one annular rib in the middle in the axial direction, and the fitting is connected to the electric equipment storage box. The body is a gasket retainer having a round hole having a stepped portion at one end of its inner diameter, and has a waterproof structure for a wire penetration portion in the electrical equipment storage box, or in the electrical equipment storage box Fitted fit Body, a waterproof structure of a wire insertion portion in the electrical equipment storage box is a lead-out pipe provided with a circumferential slit for attaching the binding band on the side opposite to the connection side.

  In the present invention, since cleats and sealing materials as in the past are not used, wiring work and maintenance work are reduced in cost, and since no sealing material is used, the drying time is unnecessary and the working time can be shortened. As a result, the waterproof performance is remarkably improved.

  As for the waterproof performance of railway vehicles, there is “Checking whether water has entered inside by immersing in a 1 meter underwater for 15 minutes” stipulated in the waterproof section of JIS E 4202 [Jumper coupler] of Japanese Industrial Standards. Although it is regarded as one standard, the waterproof structure of the present invention showed good results that cleared “2 m in water for 15 minutes” which is twice the above standard in any of the examples.

  In the present invention, the cylindrical gasket 5 is mounted between the fitting body connected to the box without a gap at the penetrating portion of the electric device storage box and the cable penetrating the box to perform waterproofing. The cylindrical gasket 5 is preferably formed by forming the annular ribs 51 and 52 on the inner peripheral surface and the outer peripheral surface, respectively, as in the invention described in Patent Document 1, but in the present invention, the annular rib on the inner peripheral surface is particularly preferable. The waterproof effect of 51 is important. Of course, when the thickness of the cross section of each of the annular ribs 51 and 52 is t and the protrusion length is h, the ratio of h / t is preferably 1.5 or more and 6.0 or less. In the present invention, it is not limited to only those having this dimension.

  A first embodiment of the present invention will be described with reference to FIG. This figure is a cross-sectional view showing the penetration (extruded portion) of the cable C on the back side of the electrical equipment storage box, where 1 is the box (the back plate), 10 is the cut hole on the back side, and 2 is the plate cut from the rubber sheet Gasket, 3 is a hard support plate, 4 is a resin holder or a metal gasket, and a gasket holder is formed with a round hole having a stepped portion 41 on one inner diameter portion, and 5 is a cylindrical gasket.

  A support plate 3 is arranged via a plate gasket 2 which is an elastic material so that no gap is generated with respect to the metal box 1, and a gasket presser 4 is placed on a cylindrical gasket 5 fitted to the cable C. The gasket retainer 4 is connected to the box 1 by sandwiching the cylindrical gasket 5 between the plate 3 and the stepped portion 41 of the gasket retainer 4, thereby realizing a waterproof structure.

  Since there are usually a plurality of cables C that penetrate the box, including the following embodiments, the plate gasket 2, the support plate 3, the gasket retainer 4, etc. are not necessarily provided for each cable C. In many cases, they are not independent but have a shape in which they are connected. An image of the support plate 3 and the gasket retainer 4 in the first embodiment is shown in the perspective view of FIG.

  A second embodiment of the present invention will be described with reference to FIG. This figure is also a cross-sectional view showing a penetration portion of the cable C on the back side of the electric equipment storage box, 31 is a press screw, and the other symbols are the same as those in FIG.

  A gasket retainer 4 having a round hole formed through a plate gasket 2 which is an elastic material so as not to cause a gap with respect to the metal box 1 is inserted in the direction opposite to that of the first embodiment, and is fitted into the cable C. The cylindrical gasket 5 is pushed into the inside, the support plate 3 is covered from the outside, and the gasket retainer 4 is pressed against the gasket retainer 4 by the presser screw 31 so that the tubular gasket 5 is sandwiched between the gasket retainer 4 and the waterproof structure. doing.

  A third embodiment of the present invention will be described with reference to FIG. This figure is also a sectional view showing a penetration portion of the cable C on the back side of the electrical equipment storage box, and the difference from the second embodiment is that a spacer 6 is inserted between the gasket retainer 4 and the support plate 3. . The spacer 6 has a perforated disc divided into two, and the gasket retainer 4 has a thickness corresponding to the thickness of the spacer 6, and the cable C or the cylindrical gasket 5 can be thinned over a long period of use. If a gap is generated, the gasket 6 can be tightened by removing the spacer 6 or replacing it with a thin one to restore the waterproof function.

  A fourth embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a cross-sectional view showing a penetration portion of the cable C on the back side of the electrical equipment storage box, FIG. 6 is a cross-sectional view of the AA, 1 is a box (back plate), 10 is a cut hole on the back surface, and 11 is a cut hole. A free bush covering the inner circumference of 10, 7 is an outlet pipe connected to the back plate of the box 1, 71 is a circumferential slit formed in the outlet pipe 7, and 72 is passed through the slit 71 to the outlet pipe 7. A unity band.

  A lead pipe 7 is connected to the outer surface surrounding the cut hole 10 of the metal box 1. In the case of welding, all-round welding shall be performed. In the case of screwing, sandwich the plate gasket so that there is no gap. The inner diameter of the lead pipe 7 needs to be slightly smaller than the outer diameter of the cylindrical gasket 5. The slit 71 is provided at a position separated from the back plate by the length of the cylindrical gasket 5 or more. The resin-made free bush 11 is attached so as not to damage the cable C when passing through the cut hole 10, and is not necessary when the cut hole 10 is sufficiently large as in the first to third embodiments.

  If the cable C is passed through the box 1 and the cylindrical gasket 5 is pushed into the outlet pipe 7 and a binding band 72 is attached to prevent the dropout, a waterproof structure is realized. As the binding band 72, an elastic belt such as a spring may be used, or a flexible band material such as a thin steel belt or a resin belt may be fixed with a fixing tool such as a buckle.

FIG. 3 is a cross-sectional view showing a cable lead-out portion on the back side of the box in the first embodiment of the present invention. FIG. 3 is a perspective view showing an image of a support plate and a gasket support in the first embodiment of the present invention. It is sectional drawing which shows the opening part of the cable of the back side of the box in the 2nd Example of this invention. It is sectional drawing which shows the opening part of the cable of the back side of the box in the 3rd Example of this invention. It is sectional drawing which shows the extraction part of the cable of the back side of the box in the 4th Example of this invention. It is AA sectional drawing in FIG. It is a perspective view which shows the back side of the box in a prior art in the step which passed the terminal of the cable. It is a perspective view which shows the back side of the box in a prior art in the state of the completion of attachment of a cable. It is a side view which shows the socket of a conventionally well-known electrical connector in a partial cross section. It is a side view which shows a conventionally well-known cylindrical gasket in a partial cross section.

Explanation of symbols

1 Electrical equipment storage box
2 Plate gasket 3 Support plate 4 Gasket presser (fit body)
5 Cylindrical gasket 6 Spacer 7 Lead pipe (fitting)
8 Cleat 9 Socket
10 cut hole
11 Swivel bush
31 Presser screw
41 Stepped part
51, 52 Annular rib
71 Slit
72 Cable ties
81 Sewing bolt
82 Mounting bolt
91 Casing
92 Insulation base
93 Socket contact
94 Tightening gland
C Cable S Seal material T Terminal

Claims (4)

  1.   It is a waterproof structure of the electric wire penetration part in an electric equipment storage box, Comprising: The fitting (4, 7) connected to this electric equipment storage box (1) without a clearance gap, and the cable (C which penetrates an electric equipment storage box (C) A tubular gasket (5) is mounted between the wire penetration part and the waterproof structure of the electrical equipment storage box.
  2.   In the cylindrical gasket (5), a plurality of annular ribs (51) are formed on the inner peripheral surface at substantially equal intervals in the axial direction, and at least one annular rib (52) is formed in the axially intermediate portion on the outer peripheral surface. The waterproof structure of the electric wire penetration part in the electric equipment storage box of Claim 1 which is formed.
  3.   The electric wire penetration part in the electrical equipment storage box according to claim 1 or 2, wherein the fitting body is a gasket retainer (4) in which a round hole having a stepped part (41) is formed at one end of the inner diameter. Waterproof structure.
  4.   The electric fitting according to claim 1 or 2, wherein the fitting body is an outlet pipe (7) provided with a circumferential slit (71) for mounting the binding band (72) on the side opposite to the connection side. Waterproof structure for wire penetrations in equipment storage boxes.
JP2003379636A 2003-11-10 2003-11-10 Waterproof construction of penetrating portion for electric wire in housing of electrical equipment Pending JP2005142472A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003379636A JP2005142472A (en) 2003-11-10 2003-11-10 Waterproof construction of penetrating portion for electric wire in housing of electrical equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003379636A JP2005142472A (en) 2003-11-10 2003-11-10 Waterproof construction of penetrating portion for electric wire in housing of electrical equipment

Publications (1)

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JP2005142472A true JP2005142472A (en) 2005-06-02

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JP2003379636A Pending JP2005142472A (en) 2003-11-10 2003-11-10 Waterproof construction of penetrating portion for electric wire in housing of electrical equipment

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007129084A (en) * 2005-11-04 2007-05-24 Saxa Inc Waterproof construction of apparatus for outdoor installation
JP2007174162A (en) * 2005-12-21 2007-07-05 Matsushita Electric Ind Co Ltd Antenna system
JP2010010540A (en) * 2008-06-30 2010-01-14 Meidensha Corp Cable fitting structure of electric instrument
JP2011000939A (en) * 2009-06-17 2011-01-06 Nippon Sharyo Seizo Kaisha Ltd Underfloor apparatus box wiring structure
JP5174989B1 (en) * 2011-10-18 2013-04-03 三菱電機株式会社 Jumper coupler
JP2015121517A (en) * 2013-12-25 2015-07-02 エスペック株式会社 Wiring mounting device for box-shaped apparatus

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007129084A (en) * 2005-11-04 2007-05-24 Saxa Inc Waterproof construction of apparatus for outdoor installation
JP4544134B2 (en) * 2005-11-04 2010-09-15 サクサ株式会社 Waterproof structure for outdoor installation equipment
JP2007174162A (en) * 2005-12-21 2007-07-05 Matsushita Electric Ind Co Ltd Antenna system
JP4715500B2 (en) * 2005-12-21 2011-07-06 パナソニック株式会社 Antenna device
JP2010010540A (en) * 2008-06-30 2010-01-14 Meidensha Corp Cable fitting structure of electric instrument
JP2011000939A (en) * 2009-06-17 2011-01-06 Nippon Sharyo Seizo Kaisha Ltd Underfloor apparatus box wiring structure
JP5174989B1 (en) * 2011-10-18 2013-04-03 三菱電機株式会社 Jumper coupler
US9124020B2 (en) 2011-10-18 2015-09-01 Mitsubishi Electric Corporation Jumper connector
JP2015121517A (en) * 2013-12-25 2015-07-02 エスペック株式会社 Wiring mounting device for box-shaped apparatus

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