JP2011003673A - Underfloor apparatus box wiring structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an underfloor apparatus box wiring structure for simplifying wiring work of electric wires, through an underfloor apparatus box that requires airtightness.SOLUTION: In the underfloor apparatus box wiring structure for sealing a through-section of the electric wire 8, wired through the underfloor apparatus box 1 installed under the floor of body, a plurality of insertion holes 2 for passing the electric wire 8 are formed on the side of the underfloor apparatus box 1, and a sealing member 5 for sealing the gap between the insertion holes 2 and the electric wire 8 includes an external member 10, embedded into the plurality of insertion holes 2 formed on the side of the underfloor apparatus box 1 and a pin member 20 pushed into the external member 10. Then, while a cylindrical section 12 of the external member 10 is embedded in the insertion holes 2 of the underfloor apparatus box 1 and the electric wire 8 is passed through a through-hole 20a of the cylindrical section 12 and the pin member 20, the pin member 20 is pushed into the cylindrical section 12, thus forming an expanded diameter expansion section B in the cylindrical section 12 and sandwiching sides 1a, 1b around the through-holes by the diameter-widening section B and the flange section 13.

Description

  TECHNICAL FIELD The present invention relates to an underfloor equipment box wiring structure for passing an electric wire through an underfloor equipment box installed under the floor of a vehicle body and sealing the penetrating portion. In particular, the wiring operation of the electric wire through the underfloor equipment box is simplified. It relates to the underfloor equipment box wiring structure.

  A railcar is provided with an underfloor equipment box under a vehicle body frame, and an inverter, a converter, a control board, a relay, a detector, a capacitor, and the like for controlling the vehicle are provided as the underfloor equipment. A terminal block is provided inside the underfloor equipment box, and an external electric wire and the underfloor equipment are electrically connected. When the electric wire passes through the underfloor device box and is connected to the underfloor device, the electric wire is sandwiched between the through portions with an insulator, and the periphery is sealed, for example, as shown in FIG. Wiring is applied. FIG. 8 is a diagram showing an underfloor equipment box wiring structure described in Patent Document 2 below.

  The underfloor equipment box 101 is formed with a large opening 111 through which a plurality of electric wires 102 are passed, and the opening 111 is closed by a cleat 103 that holds the electric wires 102. The cleat 103 is composed of a pair of upper and lower blocks, and a semicircular groove for sandwiching the electric wire 102 is formed on the mating surface. Such cleat 103 is integrally fixed by a bolt 106 that penetrates in the vertical direction while holding the electric wire 102, and is further attached to the underfloor equipment box 101 by a plurality of bolts 105. And between the upper and lower mating surfaces sandwiching the electric wire 102 and the underfloor equipment box 101, a seal portion 104 is formed which has been subjected to a sealing process by filling with putty.

JP 2006-168534 A JP 2005-142472 A

  However, in the conventional underfloor equipment box wiring structure using the cleat 103, there is a problem that the seal portion 104 is peeled off in addition to the problem that the number of man-hours is large for the wiring work involving the sealing process. That is, in the structure in which the opening 111 of the underfloor equipment box 101 is formed and closed by the cleat 103, there are many places where the putty is filled, including that the cleat 103 itself is a divided member. Therefore, the putty filling which has been performed so as not to generate a gap takes time and is troublesome. Even when the putty is buried tightly, if the electric wire 102 is pulled by something, or if the bent electric wire 102 is shaken and moved due to vibration during running of the railway vehicle, a load is applied to the putty-filled portion. As a result, the seal portion 104 is peeled off and the airtightness is impaired.

  Therefore, an object of the present invention is to provide an underfloor equipment box wiring structure that simplifies the wiring work of an electric wire penetrating an underfloor equipment box that is required to be airtight.

  An underfloor equipment box wiring structure according to the present invention is an underfloor equipment box wiring structure that seals the penetration portion of an electric wire that passes through an underfloor equipment box installed under the floor of a vehicle body. Is formed with a plurality of insertion holes through which the electric wire passes, and the gap between the insertion hole and the electric wire is sealed by a seal member 5, and the seal member includes an outer member fitted into the insertion hole, A pin member that is pushed into the inside of the external member, and the outer member includes a cylindrical portion and a flange portion that protrudes circumferentially from one end of the cylindrical portion and closely contacts the side surface of the underfloor equipment box. The pin member is provided on a rod-shaped portion, a pressing portion provided on an outer periphery of the rod-shaped portion to press the cylindrical portion against the insertion hole, and provided on a rear end of the rod-shaped portion in a pressing direction. A large diameter portion having a diameter larger than the inner diameter, and the rod-shaped portion And a through-hole through which the electric wire passes and the pin member passes through the large-diameter portion, and the cylindrical portion of the outer member is fitted into the insertion hole of the underfloor equipment box, and the cylindrical portion and the through-hole are inserted. In the state where the electric wire is passed, the pin member is pushed into the cylindrical portion to form an enlarged diameter portion swelled in the cylindrical portion, and the insertion is performed between the enlarged diameter portion and the flange portion. It is characterized by sandwiching the side surface around the hole.

In the underfloor equipment box wiring structure according to the present invention, it is preferable that a plurality of pressing portions of the pin member are formed along a pressing direction of the pin member.
In the underfloor equipment box wiring structure according to the present invention, it is preferable that the pressing portion of the pin member is formed in an umbrella shape whose side opposite to the pressing direction of the pin member is widened.
In the underfloor equipment box wiring structure according to the present invention, it is preferable that the pin member is composed of a pair of half-crack members formed in a divided manner.
In the underfloor equipment box wiring structure according to the present invention, it is preferable that the large-diameter portion of the pin member includes a plane inclined with respect to a plane perpendicular to the pressing direction of the pin member.

  According to the present invention, the cylindrical portion is formed by fitting the cylindrical portion of the outer member into the insertion hole of the underfloor equipment box and pushing the pin member into the cylindrical portion in a state where the electric wire is passed through the cylindrical portion and the through hole. The electric wire can be wired while sandwiching and sealing the side surface around the insertion hole between the expanded diameter portion and the flange portion. Moreover, since the cylindrical portion is pressed against the insertion hole by the pressing portion, the gap between the cylindrical portion and the pressing portion can also be sealed. In this way, even when wiring multiple wires to the underfloor equipment box, a wiring structure that secures sealing performance with simple wiring work without performing troublesome sealing work such as screwing or putty filling is realized. be able to.

It is the perspective view which showed the underfloor equipment box which concerns on this embodiment. It is the perspective view which showed the underfloor apparatus box wiring structure of the state which wired to the underfloor apparatus box. It is a perspective view which shows the whole structure of a sealing member. It is sectional drawing which shows a sealing member. It is sectional drawing which shows the state which inserted the grommet in the through-hole. It is sectional drawing which shows the state which pushed the pin into the grommet. It is a perspective view which shows the pin which concerns on a modification. It is the figure which showed the conventional underfloor equipment box wiring structure.

  Hereinafter, an embodiment of an underfloor equipment box wiring structure according to the present invention will be described in detail with reference to the drawings. The underfloor device according to the present embodiment is provided under the vehicle body floor of the railway vehicle as in the conventional example. In the underfloor device box, devices such as an inverter and a control board are installed. It is connected to the electric wire. Railcars are subject to water splashing during travel, and the underfloor equipment box is covered with water, so in the underfloor equipment box wiring structure, the wire insertion part is sealed to prevent water from entering through the wire etc. Structure is given.

The underfloor equipment box according to the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view showing an underfloor equipment box according to the present embodiment. FIG. 2 is a perspective view showing the underfloor equipment box wiring structure in a state in which the underfloor equipment box is wired.
As shown in FIG. 1, in the underfloor equipment box 1, an insertion hole 2 is formed for each electric wire on a side surface through which a plurality of electric wires 8 are passed. As shown in FIG. 2, an electric wire 8 is wired through the insertion hole 2. The wired electric wire 8 is connected to each device inside the underfloor device box 1. The gap between the electric wire 8 and the insertion hole 2 is sealed by the seal member 5.

Next, the seal member 5 will be described with reference to FIGS. 3 and 4. FIG. 3 is a perspective view showing the overall configuration of the seal member. FIG. 4 is a cross-sectional view showing the seal member.
As shown in FIGS. 3 and 4, the seal member 5 includes a grommet 10 to be fitted into the insertion hole 2 and a pin 20 to be pushed into the grommet 10. The grommet 10 of the present embodiment corresponds to the “outer member” of the present invention, and the pin 20 of the present embodiment corresponds to the “pin member” of the present invention. Hereinafter, a direction in which the pin 20 is pushed into the grommet 10 is referred to as a “push-in direction X”.

  The grommet 10 is formed of an elastic material such as rubber or soft resin (thermoplastic elastomer). The grommet 10 includes a cylindrical portion 12 that is fitted into the insertion hole 2, and a flange portion 13 that is provided at one end portion of the cylindrical portion 12 and is in close contact with the side surface of the underfloor equipment box 1. The outer diameter of the cylindrical portion 12 is formed to be approximately the same as the hole diameter of the insertion hole 2 so that the outer diameter of the cylindrical part 12 can be fitted into the insertion hole 2 without a gap. Moreover, the contact surface 13a with the side surface of the underfloor equipment box 1 in the flange part 13 is comprised so that the role of the suction pad made to adsorb | suck to a side surface may be played.

  The pin 20 is formed of the same material as the grommet 10 or a soft resin or hard resin harder than the grommet 10. The pin 20 includes a rod-like portion 21 that extends in the push-in direction X. A large-diameter portion 23 having a spherical shape larger than the inner diameter A of the cylindrical portion 12 is formed at the end of the rod-shaped portion 21 opposite to the pushing direction X. By pushing the large-diameter portion 23 into the tubular portion 12, the expanded portion of the tubular portion 12 that swells sandwiches the side surface around the insertion hole 2 with the flange portion. A through hole 20 a for passing the electric wire 8 in the pushing direction X is formed at the center of the rod-like portion 21 and the large diameter portion 23. Three pressing portions 22 that press the inner peripheral surface 12 a of the cylindrical portion 12 and press the cylindrical portion 12 against the insertion hole 2 are formed along the pressing direction X on the outer peripheral surface of the rod-shaped portion 21.

  Each pressing part 22 is formed in an umbrella shape in which the opposite side to the pressing direction X is widened (see 22a in FIG. 6). The pressing portion 22 presses the inner peripheral surface 12a of the cylindrical portion 12 to the outside by its elastic force, and the inner peripheral surface 12a of the cylindrical portion 12 when the pin 20 attempts to return in the direction opposite to the pressing direction X. It is supposed to be caught in.

  Next, the state of wiring work for wiring the electric wires 8 to the underfloor equipment box 1 will be described with reference to FIGS. 5 and 6. FIG. 5 is a cross-sectional view showing a state in which the grommet is fitted into the through hole. FIG. 6 is a cross-sectional view showing a state in which the pin is pushed into the grommet.

  First, as shown in FIG. 5, the tubular portion 12 of the grommet 10 is fitted into the through hole 2 from the outside of the underfloor equipment box 1. Then, the electric wire 8 is passed through the grommet 10 from the flange portion 13 side of the grommet 13. Thereafter, the electric wire 8 is passed through the through hole 20 a of the pin 20 from the pressing portion 22 side inside the underfloor equipment box 1. As shown in FIG. 2, the tape 25 is wound around the distal end portion of the pin 20 in the pressing direction X side. Since the pin 20 can be positioned with respect to the electric wire 8 by winding the tape 25 in this way, the wiring work can be facilitated. Moreover, by winding the tape 25, the airtightness between the pin 20 and the electric wire 8 can be enhanced.

  Then, as shown in FIG. 6, the electric wire 8 is pulled in the pressing direction X in a state where the flange portion 13 is pressed against the outer surface 1 a of the underfloor equipment box 1 so that the grommet 10 is not pulled out. As a result, the large diameter portion 23 of the pin 20 is pushed into the tubular portion 12 of the grommet 10. Here, the large-diameter portion 23 of the present embodiment has a spherical shape larger than the inner diameter A of the cylindrical portion 12. Moreover, the cylindrical part 12 is formed of the elastic material. For this reason, when the large-diameter portion 23 is pushed into the cylindrical portion 12, a swelled enlarged diameter portion B is formed in the cylindrical portion 12. And both the side surfaces 1a and 1b of the underfloor equipment box 1 are inserted | pinched by this enlarged diameter part B and the flange part 13. As shown in FIG.

  At this time, the cylindrical portion 12 of the grommet 10 is pressed against the peripheral surface of the insertion hole 2 by its own elastic force or the pressing portion 22 of the pin 20. In this way, the cylindrical portion 12 is fitted in the insertion hole 2 in an airtight manner, and seals the insertion hole 2 so that there is no gap. Further, since the cylindrical portion 12 is pressed against the insertion hole 2 by the plurality of pressing portions 22, the sealing can be performed more reliably. Further, the underfloor device box 1 is sandwiched between the flange portion 13 and the enlarged diameter portion B, and the insertion hole 2 is sealed so that the contact surface 13a is in close contact with the side surface 1a of the underfloor device box 1.

  Furthermore, since each pressing part 22 is formed in an umbrella shape whose side opposite to the pressing direction X extends, the pin 20 can be easily pushed into the cylindrical part 12, but the pin 20 can be pushed into the cylindrical part 12. If it tries to pull out from the pin 20, each pressing part 22 works so as to be hooked on the inner peripheral surface 12 a of the cylindrical part 12, so that the pin 20 is difficult to come off. For this reason, even if a force is applied to the electric wire 8 due to vehicle vibration or the like, the pin 20 and the grommet 10 can be effectively prevented from coming off.

  As described above in detail, in the underfloor equipment box wiring structure according to the present embodiment, even when a plurality of electric wires 8 are wired to the underfloor equipment box 1 as shown in FIG. By wiring while attaching the seal member 5, high airtightness can be ensured by an easy wiring operation. That is, in the conventional structure shown in FIG. 13, troublesome work such as screwing and putty filling is necessary, but according to the present embodiment, the wiring work can be done with a very simple work. By simplifying the wiring work in this way, the assembly quality can be leveled and a stable waterproof performance can be obtained.

  Further, since the grommet 10 itself is formed of an elastic material, even when the electric wire 8 swings outside the underfloor equipment box 1, the grommet 10 is deformed while maintaining airtightness. Accordingly, there is no possibility that a gap is generated in the seal portion 5 to allow entry of water and the performance of the seal is not impaired. In addition, in the underfloor equipment wiring structure of the present embodiment, the electric wires 8 can be exchanged individually, and the grommet 10 can be easily attached and detached, so that the handling is simple and convenient. .

  Furthermore, according to the wiring work of the present embodiment, since the waterproofing measures can be taken simultaneously with the wiring work of the electric wires 8, the working time can be shortened as compared with the case where waterproofing measures are taken separately as in the prior art. it can. Further, since it is not necessary to separately attach a waterproofing member or the like as in the conventional structure to the underfloor equipment box 1, the number of parts can be reduced.

[Modification]
Next, a modification of the pin 20 constituting the seal member 5 will be described with reference to FIG. FIG. 7 is a perspective view showing a pin according to a modification.
The pin according to the modification is different from that of the above embodiment in the shape of the large diameter portion. Specifically, the pin according to the modification includes a large-diameter portion 30 having a top shape instead of the above-described large-diameter portion 20 having a spherical shape. A flat surface 30 a that is inclined with respect to a surface perpendicular to the pressing direction X of the pin 20 is formed on the pressing direction X side of the large diameter portion 30.

  According to the pin according to this modification, when the pin is pushed into the cylindrical portion 12, the large-diameter portion having a large contact area with the inner side surface 1b of the underfloor equipment box 1 is formed by the flat surface 30a of the large-diameter portion 30. It can be formed in the shape part 12. In this way, by bringing the inner surface 1b of the underfloor equipment box 1 and the enlarged diameter portion into contact with each other in a large area, it is possible to ensure higher airtightness than in the above embodiment. In addition, by tilting the flat surface 30 a with respect to a plane perpendicular to the pressing direction X of the pin 20, the pin 20 can be easily inserted into the cylindrical portion 12.

  As mentioned above, although embodiment of the underfloor apparatus wiring structure which concerns on this invention was described, this invention is not limited to this, A various change is possible in the range which does not deviate from the meaning. Examples thereof are shown in (1) to (3) below.

(1) The pin 20 of the above-described embodiment may be configured by combining a pair of half-cracked members formed separately. In this case, for example, the half-cracked members are connected by a hinge, and a locking portion is formed on each half-cracked member so that it can be locked when combined. According to such an aspect, the electric wires 8 may be sandwiched between the half-cracked members, and the work to be performed inside the underfloor equipment box 1 is slower than when the electric wires 8 are passed through the pins 20 inside the underfloor equipment box 1. It can be simple.
(2) In the above embodiment, the tape 25 is wound around the tip of the pin 20 in the pressing direction X side to ensure the sealing performance. However, a fastening band or the like may be used.
(3) In the said embodiment, although the press part 22 of the pin 20 is formed in umbrella shape, it is good also considering the press part 22 as other shapes, such as donut shape.

DESCRIPTION OF SYMBOLS 1 Underfloor equipment box 1a Outer side surface 1b Inner side surface 2 Through-hole 5 Seal member 8 Electric wire 10 Grommet 12 Tubular part 12a Inner peripheral surface 12b Outer peripheral surface 13 Flange part 13a Contact surface 20 Pin 20a Through-hole 21 Rod-shaped part 22 Press part 23 Large diameter part 25 Tape B Expanded part

Claims (5)

In the underfloor equipment box wiring structure that seals the perforated portion of the wire that runs through the underfloor equipment box installed under the floor of the vehicle body,
A plurality of insertion holes through which the electric wires are passed are formed on the side surface of the underfloor equipment box, and a gap between the insertion holes and the electric wires is sealed by a seal member 5,
The seal member has an outer member to be fitted into the insertion hole, and a pin member to be pushed into the outer member,
The outer member includes a cylindrical portion, and a flange portion that protrudes circumferentially from one end of the cylindrical portion and adheres closely to a side surface of the underfloor equipment box,
The pin member includes a rod-shaped portion, a pressing portion that is provided on an outer periphery of the rod-shaped portion and presses the cylindrical portion against the insertion hole, and an inner diameter of the cylindrical portion that is provided at a rear end in the pressing direction of the rod-shaped portion. A large-diameter portion that has a larger diameter, and a through-hole that passes through the pin member through the rod-shaped portion and the large-diameter portion,
By inserting the pin member into the cylindrical part in a state where the cylindrical part of the outer member is fitted into the insertion hole of the underfloor equipment box and the electric wire is passed through the cylindrical part and the through hole, An underfloor equipment box wiring structure characterized in that an enlarged diameter portion swelled in the tubular portion is formed and a side surface around the insertion hole is sandwiched between the enlarged diameter portion and the flange portion. In the underfloor equipment box wiring structure according to claim 1,
The underfloor equipment box wiring structure, wherein a plurality of pressing portions of the pin member are formed along a pressing direction of the pin member. In the underfloor equipment box wiring structure according to claim 1 or claim 2,
The underfloor equipment box wiring structure characterized in that the pressing portion of the pin member is formed in an umbrella shape whose side opposite to the pressing direction of the pin member extends. In the underfloor equipment box wiring structure according to any one of claims 1 to 3,
The underfloor equipment box wiring structure, wherein the pin member is constituted by a pair of half-cracked members formed separately. In the underfloor equipment box wiring structure according to any one of claims 1 to 4,
The underfloor equipment box wiring structure according to claim 1, wherein the large-diameter portion of the pin member has a plane inclined with respect to a plane perpendicular to the pressing direction of the pin member.

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