JP2002158463A - Cable waterproof device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To easily and surely waterproof seal a plurality of cables collectively to a plurality of cable insertion ports of a device housing. SOLUTION: The cable waterproof device 10 includes an equipment housing 12.
A plurality of receiving portions provided in the cable insertion portion 14, and a plurality of sealing members 20 individually received in the receiving portions.
And the cable insertion portion 1
4 and a pressing member 22 attached to the control unit 4. Each seal member 20 includes an elastic seal portion having a through passage 32 having a shape corresponding to the target cable. The pressing member 22 is attached to the cable insertion portion 14 by a pair of small screws 46,
By tightening the small screws 46, the pressing member 22
Pushes the plurality of seal members 20 into the corresponding receiving portions at once. Thereby, the elastic seal portions of the plurality of seal members 20 come into close contact with the corresponding inner surface of the receiving portion and the outer surface of the cable,
Exhibits a waterproof seal function for multiple cables.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable waterproof device for waterproofly sealing a cable between a cable insertion port of an equipment housing and a cable.

[0002]

2. Description of the Related Art In general, a device housing such as a communication device or a power supply device which is assumed to be installed outdoors has a waterproof structure capable of preventing liquid such as rainwater from entering the inside of the housing. In particular, a cable waterproof device for waterproofly sealing a gap between the cable insertion port and the cable is used for a cable insertion port provided in the housing wall for introducing a communication cable and a power cable into the housing. .

[0003] An example of this type of conventional cable waterproof device is disclosed in Japanese Patent Application Laid-Open No. Hei 10-32697. This cable waterproofing device has a tubular main body attached to a cable insertion opening, a cap attached to the cylindrical main body outside the housing, and having a cable insertion hole, and compressed and held between the cylindrical main body and the cap. And a packing close to the cable. The cylindrical body has an annular flange protruding from its outer peripheral surface, and external threads are formed on both sides in the axial direction of the annular flange. The cylindrical main body is fixed to the housing wall by inserting one end in the axial direction into the housing from the cable insertion opening and screwing a fixing nut to an external thread from the inside of the housing. At this time, between the annular flange and the housing wall,
A seal ring is arranged.

At the other end in the axial direction of the cylindrical main body, a tapered inner peripheral surface for receiving packing is formed on the inner peripheral side thereof, and a corresponding tapered outer peripheral surface is formed on the packing. The packing is attached to the cable so as to surround the cable in a ring shape, and the tapered outer peripheral surface of the packing contacts the tapered inner peripheral surface of the cylindrical body by inserting the cable into the cylindrical body from the outside of the housing. Is done. In this state, the cap is screwed into the male screw at the other end in the axial direction of the tubular body while the cable is inserted through the cable insertion hole, whereby the packing is compressed and held between the tubular body and the cap. As a result, the packing comes into close contact with the cylindrical body and the cap in an elastically contracted state, and further comes into close contact with the outer surface of the cable due to the pressure applied from the tapered inner peripheral surface to the tapered outer peripheral surface of the cylindrical body. In this way, the space between the cable insertion port and the cable is securely sealed with water.

[0005]

The conventional cable waterproof device described above uses the tubular main body attached to one cable insertion opening of the equipment housing, so that a plurality of cables are attached to the equipment housing. If an insertion port is provided, a corresponding number of cable waterproof devices will be used. In this case, these cable insertion ports need to be formed in the housing wall at an interval at which a plurality of cable waterproof devices can be juxtaposed. In such a configuration, there is a concern that downsizing of the device housing may be limited due to the waterproof structure, and a plurality of cables may be collectively collected from a specific position on the housing wall due to external factors such as a device installation location. If derivation is required, there is a concern that it will not be possible to deal with it. Furthermore, since the cable waterproof device is mounted on each of the plurality of cable insertion ports, the mounting operation tends to be extremely complicated as the number of parts increases.

The above-mentioned Japanese Patent Application Laid-Open No. 10-326978 discloses a waterproofing device that collectively waterproof seals a plurality of cables by substantially the same configuration as the above-described cable waterproofing device for a single cable. . However, since this waterproof device is used by attaching a tubular main body to one cable insertion opening through which a plurality of cables are inserted, a relatively large-diameter cable insertion opening provided on the housing wall is used. It is feared that the waterproof performance between the main body and the waterproof performance between one packing and the outer surfaces of the plurality of cables is reduced.
In particular, with this waterproof device, it is difficult to collectively waterproof seal a plurality of cables having different external shapes.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cable waterproofing device for waterproofly sealing a cable between a cable insertion opening of a device housing and a cable, which makes assembly work more complicated than a conventional cable waterproofing device for a single cable. Without deteriorating the waterproof seal function for each cable,
It is an object of the present invention to provide a cable waterproof device capable of waterproofly sealing a plurality of cables at a time. Another object of the present invention is to
It is an object of the present invention to provide a cable waterproof device which can collectively waterproof seal different kinds of cables having different external shapes.

[0008]

In order to achieve the above object, an invention according to claim 1 is a cable for waterproofly sealing between a cable insertion port of an equipment housing and a cable arranged in the cable insertion port. In the waterproof device, a plurality of receiving portions formed on the housing wall of the device housing, each of which functions as a cable insertion port, are individually received by the plurality of receiving portions, and can be closely contacted with the inner surface of the receiving portion and the outer surface of the cable. A plurality of seal members having an elastic seal portion and a plurality of seal members are collectively sandwiched between the housing wall and attached to the housing wall, and the elastic seal portions of the plurality of seal members are placed under pressure in corresponding receiving portions. And a pressing member that pushes in a lump at a time.

In this cable waterproof device, a cable is inserted into each of the plurality of receiving portions of the housing wall, and a seal member is disposed in each of the receiving portions. In this state, one pressing member is attached to the housing wall, and the sealing members are collectively pressed into the receiving portion by the pressing member. Thereby,
Each seal member is in close contact with the inner surface of the receiving part and the outer surface of the cable,
The required waterproof seal for a plurality of cables is established collectively.

According to a second aspect of the present invention, in the cable waterproofing device according to the first aspect, each of the plurality of receiving portions includes:
Provided is a cable waterproof device including a first portion that opens on one surface of a housing wall, and a second portion that is gradually narrower than the first portion and opens on the other surface of the housing wall. According to this configuration, since the pressure in the central axis direction is applied from the second portion of the receiving portion to the elastic sealing portion of the sealing member pushed into the receiving portion, the elastic sealing portion can be easily and reliably brought into close contact with the cable. Can be.

According to a third aspect of the present invention, in the cable waterproofing device according to the second aspect, the first portion of the receiving portion has a cylindrical inner surface and the second portion has a truncated conical inner surface. I will provide a. According to this configuration, the elastic seal portion of the seal member can be easily and reliably brought into close contact with the inner surface of the receiving portion.

According to a fourth aspect of the present invention, in the cable waterproof device according to any one of the first to third aspects, each of the plurality of seal members is connected to the elastic seal portion, and one end of the seal member is connected to the elastic seal portion. Provided is a cable waterproof device having an overhanging portion that extends outward and engages with a surface of a housing wall. According to this configuration, the falling off of the seal member from the receiving portion is prevented.

According to a fifth aspect of the present invention, in the cable waterproofing device according to any one of the first to fourth aspects, the pressing members have the same number and the same arrangement of a plurality of cable insertion holes as the plurality of receiving portions. The present invention provides a cable waterproof device having:
According to this configuration, the mounting position of the pressing member on the plurality of receiving portions is specified.

According to a sixth aspect of the present invention, there is provided the cable waterproofing device according to any one of the first to fifth aspects, wherein the pressing member has at least one reinforcing rib. According to this configuration, a strong pressing force can be applied from the pressing member to the plurality of seal members.

According to a seventh aspect of the present invention, in the cable waterproofing device according to any one of the first to sixth aspects, the pressing member is attached to the housing wall by a plurality of screws, and the screws are tightened. Accordingly, a cable waterproof device is provided in which each elastic seal portion of the plurality of seal members is compressed in the corresponding receiving portion. According to this configuration, the plurality of seal members can be easily and reliably compressed by the pressing member.

[0016]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In the drawings, the same or similar components are denoted by common reference numerals. FIG.
2 is a schematic perspective view of the cable waterproof device 10 according to the embodiment of the present invention, FIG. 2 is a plan view of the cable waterproof device 10, and FIG. 3 is a plan view of the cable insertion portion 14 of the equipment housing 12 in which the cable waterproof device 10 is installed. FIG. Cable waterproof device 1
Reference numeral 0 denotes a housing wall of one of the equipment housings 12 that is installed in an equipment housing 12 such as a communication device or a power supply device that is assumed to be installed outdoors.
6 and a plurality of cables C1, C2, C individually arranged in the cable insertion ports.
3 is sealed with a waterproof seal to prevent liquid such as rainwater from entering the inside of the housing.

The cable waterproofing device 10 includes a plurality of (six in the figure) receiving portions 18 provided collectively in the cable insertion portion 14 of the equipment housing 12 and a plurality of receiving portions 18 individually received by the receiving portions 18 (see FIG. In this case, the seal member 20 includes six seal members 20 and one pressing member 22 that is in contact with the seal members 20 and attached to the cable insertion portion 14. The cable insertion portion 14 projects outward at a desired position of the device housing 12 as a locally thick portion of the housing wall 16. In the cable insertion portion 14, a plurality of receiving portions 18 are recessed in a line at substantially equal intervals (for example, at a pitch of 12.5 mm), and screw holes 24 are respectively provided near both ends of the receiving portions 18 in the arrangement direction. Is formed. The cable insertion portion 14 and the housing wall 16 can be integrally formed by casting such as die casting from a metal material such as aluminum.

The plurality of receiving portions 18 recessed in the cable insertion portion 14 each function as a cable insertion opening opening in the housing wall 16 and all have the same shape. Each receiving portion 18 is provided on one wall surface 1 of the housing wall 16.
6a (that is, the outside of the device housing 12), and a first portion 26 that is gradually narrower than the first portion 26 and opens to the other wall surface 16b of the housing wall 16 (that is, the inside of the device housing 12). And a second portion 28 that performs the operation. In the illustrated embodiment, the first portion 26 of the receiving portion 18 has a cylindrical inner surface having a uniform inner diameter, and opens to the top surface 14a of the cable insertion portion 14 that is a part of the outer wall surface 16a of the housing wall 16. . Also, the second portion 28 of the receiving portion 18 has a substantially frustoconical inner surface extending from the inner end of the first portion 26 with a gradually decreasing diameter, with a small cylindrical inner surface at its smaller diameter end. To open on the inner wall surface 16b of the housing wall 16 (see FIG. 4).

Each of the seal members 20 received in each of the receiving portions 18 of the cable insertion portion 14 includes an elastic seal portion 30 which can be in close contact with the inner surface of the receiving portion 18 and the outer surface of the cable. The elastic seal portion 30 has a truncated conical outer shape, and has a through passage 32 along the center axis thereof, the through passage 32 having a shape corresponding to the outer shape of the cable to be sealed. Plural seal members 20
Have the same outer shape including the outer shape of the elastic seal portion 30, and thus can be arranged at a desired receiving portion 18 of the cable insertion portion 14. In the illustrated embodiment, the through-holes 32 having a circular cross section corresponding to the cable C1 (for example, a communication metal outdoor line) and the cable C3 (for example, an IV line).
a and a cable C2
(For example, a DC power supply cable) and a seal member 20b (FIG. 6) having a through passage 32b having a bulge-shaped cross section.
They are used in an appropriate number and in an appropriate arrangement (FIG. 7).

As shown in FIGS. 4 and 5, the outer diameter D1 (for example, 12 mm) of the large-diameter end of the elastic seal portion 30 of each seal member 20 is changed to the inner diameter d of the first portion 26 of the receiving portion 18.
(For example, 11 mm) and the outer diameter D2 (for example, 10 mm) at the small diameter end is set to be slightly smaller than the inner diameter d. Thereby, attachment and detachment of the seal member 20 to and from the receiving portion 18 become easy. The axial length T of the elastic seal portion 30 is set to be longer than the axial length t (for example, 6 mm) of the first portion 26 of the receiving portion 18 by a required amount. Angle α (eg, 3 ° to 7)
(°) is set sufficiently smaller than the inclination angle β (for example, 26 °) with respect to the central axis of the second portion 28 of the receiving portion 18. Thereby, when the sealing member 20 is pushed into the second portion 28 side in the receiving portion 18 by the pressing member 22 as described later, a required compressive force against the elastic sealing portion 30 can be obtained, and The part 30 is prevented from slipping out toward the inner wall surface 16 b of the housing wall 16.

Each seal member 20 is further integrally connected to the small-diameter end of the elastic seal portion 30 and extended in the axial direction, and is integrally connected to the end of the connection portion 34 and outwardly. And an overhanging portion 36. Connecting part 34
Has an outer shape smaller than the elastic seal portion 30, and when the seal member 20 is inserted into the receiving portion 18 as described later,
The second portion 28 of the receiving portion 18 is received in the cylindrical opening at the small diameter end, preferably in a clearance fit relationship. Also, overhang 36
When the seal member 20 is inserted into the receiving portion 18, the second portion 2 of the receiving portion 18 is located on the inner wall surface 16 b side of the housing wall 16.
8 is arranged to protrude radially outward with respect to the small-diameter end.
The projecting portion 36 has a housing wall 1 on the side adjacent to the connecting portion 34.
The shoulder surface 36a which can be engaged with the inner wall surface 16b of 6 is formed.

In the illustrated embodiment, the connecting portion 34 of the seal member 20 has a cylindrical shape having an outer diameter smaller than the small-diameter end of the elastic seal portion 30 and is extended by a predetermined length in the axial direction of the through passage 32. You. A passage 38 that is slightly wider than the through passage 32 of the elastic seal portion 30 is formed inside the connecting portion 34. The overhanging portion 36 is provided at an axial end of the connecting portion 34 sufficiently separated from the elastic seal portion 30 to protrude radially outward in an annular flange shape. The connecting portion 34 is a seal member 2
0 is inserted into the receiving portion 18 and the elastic seal portion 30 is inserted into the receiving portion 1.
8, the shoulder surface 36 of the overhang 36
a is supported at a position away from the inner wall surface 16b of the housing wall 16, and when the elastic seal portion 30 is detached from the inner surface of the receiving portion 18, the shoulder surface 36a of the overhang portion 36
The elastic seal portion 30 is engaged until it engages with the inner wall surface 16b.
Is allowed to move in the axial direction. In addition, the shape of the connection part 34 and the overhang part 36 is not limited to the above-mentioned shape, and the connection part 34 can also be constituted by, for example, a plurality of columnar bodies arranged in a ring in parallel.

In each seal member 20, at least the elastic seal portion 30 is formed of an elastomer having a Shore A hardness of 55 to 65. If the hardness of the elastic seal portion 30 is less than this range, the portion near the large-diameter end of the elastic seal portion 30 that projects outward from the receiving portion 18 when the sealing member 20 is pushed into the receiving portion 18 by the pressing member 22 described below. Are deformed first, and as a result, it is difficult to sufficiently obtain the waterproof sealing effect of the elastic seal portion 30. If the hardness of the elastic seal portion 30 exceeds this range, the elastic seal portion 30
It is difficult to bring the pressing member 22 into close contact with the cable outer surface, and the workability of attaching the pressing member 22 to the cable insertion portion 14 is deteriorated. In a preferred embodiment, the seal member 20 is integrally molded from silicone rubber or ethylene propylene rubber (especially EPDM). Further, in consideration of the weather resistance at the time of outdoor use, it is desirable that the seal member 20 is made of a material whose elongation characteristic deteriorates by 30% or less after a 4000-hour test based on JIS-A1415.

The pressing member 22 of the cable waterproof device 10 includes:
It is a highly rigid plate-like member capable of uniformly applying a pressing force to the plurality of seal members 20 received by the plurality of receiving portions 18 of the cable insertion portion 14. In the illustrated embodiment, the pressing member 22 includes a substantially rectangular plate-shaped substrate portion 42 having a plurality of cable insertion holes 40 of the number and arrangement corresponding to the number and arrangement of the receiving portions 18 of the cable insertion portion 14, A pair of rib portions 44 extending at right angles to the substrate portion 42 along both longitudinal edges. Preferably, the pressing member 22 is integrally formed from a metal plate such as a 1.5 mm thick stainless steel plate.

Each cable insertion hole 40 of the board portion 42 is
One target cable C can be inserted through a gap,
Further, it is a circular hole having an inner diameter smaller than the outer diameter of the large-diameter end of the elastic seal portion 30 of the corresponding seal member 20. Also,
At both ends in the longitudinal direction of the board portion 42, the cable insertion portions 14 are provided.
A small screw 46 is provided corresponding to each of the pair of screw holes 24. The small screws 46 are, as shown in FIG.
Although it is preferable to hold it on the substrate portion 42 by using 8, it can be used as a separate component.

The pressing member 22 has a pair of ribs 44 arranged along the longitudinal side surface of the cable insertion portion 14, and a substrate portion 42 opposed to the top surface 14 a of the cable insertion portion 14, and a pair of small screws 46. Is screwed into the corresponding screw hole 24 to be attached to the cable insertion portion 14. At this time, the board portion 42 is positioned so that each cable insertion hole 40 overlaps with the corresponding seal member 20 received in each receiving portion 18 of the cable insertion portion 14, and each sealing hole 20 is formed in the peripheral region of each cable insertion hole 40. The large diameter end of the member 20 abuts. Thus, the plurality of seal members 20 are collectively clamped between the cable insertion portion 14 and the pressing member 22. Then, by tightening the pair of small screws 46, the seal members 20 are collectively pushed into the corresponding receiving portions 18 under pressure, and the respective elastic seal portions 30 are compressed in the respective receiving portions 18. The pair of rib portions 44 have both a function of guiding when attaching the pressing member 22 to the cable insertion portion 14 and a function of reinforcing the mechanical strength of the substrate portion 42.

Next, the installation procedure of the cable waterproof device 10 will be described with reference to FIGS. First, each of the required shapes of the through-paths 32 (through-paths 32a, 32
The plurality of seal members 20 (in the figure, the seal members 20a and 20b) having b) are inserted into the plurality of receiving portions 18 of the cable insertion portion 14 in a required arrangement. At this time, each seal member 2
0 indicates that the overhanging portion 36 is the top surface 14 of the cable insertion portion 14 first.
The protruding portion 36 is inserted into the second portion 28 of the receiving portion 18 while being elastically deformed, and protrudes toward the inner wall surface 16b of the housing wall 16 from the side a. The elastic seal portion 30 of the seal member 20 is temporarily received in the receiving portion 18 with substantially no load, and a large-diameter end portion of the elastic seal portion 30 protrudes from the top surface 14a of the cable insertion portion 14 by a predetermined length (for example, 4 mm to 5 mm). Placed in state.

The cables C1 to C3 are connected to the sealing member 20.
As described above, before or after the provisional placement of the corresponding seal members 20a, 20b
Of the pressing member 22 inserted into the through paths 32a and 32b
Is inserted through the corresponding cable insertion hole 40. In this state, the required waterproof seal has not yet been established between the elastic seal portion 30 of the seal member 20 and the inner surface of the receiving portion 18 and the outer surface of the cable C. Subsequently, the pressing member 22 is
In the peripheral region of each cable insertion hole 40 of the board portion 42, it comes into contact with the end face of the large diameter end of each seal member 20 protruding from the top surface 14 a of the cable insertion portion 14, and in this state, a pair of small screws 46 is connected to the cable. The corresponding screw hole 24 of the insertion portion 14
Then, it is attached to the cable insertion portion 14 by screwing (FIGS. 9A and 9B).

From this state, the two small screws 46 are inserted into the screw holes 24.
The plurality of sealing members 20 are pressed into the corresponding receiving portions 18 at a time by forcibly bringing the substrate portion 42 of the pressing member 22 close to the cable insertion portion 14, and the respective elastic sealing portions 30. Is compressed in the receiving part 18. At this time, the elastic seal portion 30 of each seal member 20
Is close to the inner surface of each receiving part 18 under pressure,
In particular, the pressure received from the inner surface of the truncated cone of the second portion 28 of the receiving portion 18 causes the through passage 32 to contract in the radial direction and come into close contact with the outer surface of the corresponding cable C (FIGS. 10A and 10B).
In this way, a required waterproof seal is established between the plurality of receiving portions 18 which are cable insertion ports of the device housing 12 and the cables C of various shapes arranged in the receiving portions 18, and The installation of the waterproof device 10 is completed.

In order to obtain the required waterproof sealing characteristics with the cable waterproofing device 10, the elastic sealing portions 30 of the respective sealing members 20 are provided in the corresponding receiving portions 18 at a volume compression ratio in the range of 8% to 15%. Desirably compressed. If the volume compression ratio of the elastic seal portion 30 is less than this range, the elastic seal portion 3
0 and the inner surface of the receiving portion 18 and the outer surface of the cable cannot have a close contact form sufficient to obtain the required waterproof sealing characteristics, and if the volumetric compression ratio exceeds this range, excessive stress concentration causes the elastic seal portion. 30 tends to be damaged.

When detaching the cable C from the cable waterproof device 10, the pair of small screws 46 are loosened and the pressing member 2
The pressing force applied to the plurality of seal members 20 by 2 can be released, and the cable C can be pulled out of the seal members 20. At this time, the seal member 20 follows the cable C by a frictional force or is manually forcibly moved in a direction of detaching from the receiving portion 18 under the action of the connecting portion 34 and the overhang portion 36. As a result, since the pressure applied to the cable C is substantially released, the cable C can be easily pulled out from the seal member 20. Note that the seal member 20 is
By engaging the shoulder surface 36a of 6 with the inner wall surface 16b of the housing wall 16, dropout from the receiving portion 18 is prevented.

As described above, in the cable waterproof device 10,
A seal member 20 is disposed on each of the plurality of receiving portions 18 each of which functions as a cable insertion port of the housing wall 16.
Since the sealing members 20 are collectively pushed into the receiving portion 18 by the two pressing members 22 so as to be in close contact with the inner surface of the receiving portion and the outer surface of the cable, an increase in the number of parts is suppressed, and thus the assembling operation is complicated. Without sealing, a plurality of cables C can be collectively waterproof-sealed. Further, since the interval between the adjacent receiving portions 18 can be reduced as much as possible, the miniaturization of the device housing 12 can be promoted,
Further, a plurality of cables C can be collectively derived from a specific position of the housing wall 16 as required. further,
Each seal member 20 is connected to the inner surface of the receiving portion 18 and the receiving portion 1.
8, the cables C1 to C3 having different external shapes can be individually and reliably waterproof-sealed.

[0033]

EXAMPLES The waterproof sealing characteristics of the cable waterproofing device according to the present invention will be clarified in the following examples. The cable waterproof device 10 having the above configuration is connected to the inner diameter d of the first portion 26 by d = 1.
A 1.5 mm receiving portion 18 and a sealing member 20 having a Shore A hardness of 60 are employed to form a cable C on any equipment housing 12.
1 to C3, and a device in which a conventional cable waterproofing device for a single cable (similar to that described in Japanese Patent Application Laid-Open No. 10-326978) is installed for the same device housing and cable. The following waterproof tests were performed on both sides.

(1) Initial waterproofing test: According to JIS-C0920 protection class 4. Use a dropper to cover the entire equipment housing.
Water was sprinkled at a flow rate of 0 L / min for 5 minutes, and the intrusion of water from the cable insertion port was observed. (2) Waterproof test after heat cycle: 200 heat cycles in a temperature range of −30 ° C. to 70 ° C. at 3 cycles / day.
After performing the cycle, a waterproof test equivalent to (1) was performed.
As a result, it was found that neither the cable waterproofing device of the present invention nor the conventional cable waterproofing device observed water intrusion into the inside of the housing, and had the same waterproof sealing characteristics.

[0035]

As is apparent from the above description, according to the present invention, a conventional cable waterproofing device for a single cable is provided in a cable waterproofing device for waterproofly sealing a cable between a cable insertion port of an equipment housing and a cable. In comparison with the above, a plurality of cables can be collectively waterproof-sealed without complicating the assembling work and without deteriorating the waterproof sealing function for each cable. Moreover, according to the present invention, different kinds of cables having different external shapes can be collectively and reliably waterproof-sealed.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a state in which a cable waterproof device according to an embodiment of the present invention is installed in an equipment housing.

FIG. 2 is a plan view of the cable waterproof device of FIG. 1, with the cable removed.

FIGS. 3A and 3B are diagrams of a cable insertion portion of an equipment housing in which the cable waterproof device of FIG. 1 is installed, and FIG.
(B) is a plan view from the inside of the housing.

FIG. 4 is a cross-sectional view of the cable insertion portion of FIG. 3 taken along line IV-IV.

FIG. 5 is a sectional view of a seal member used in the cable waterproof device of FIG. 1;

FIG. 6 is a sectional view of another sealing member used in the cable waterproofing device of FIG. 1;

FIG. 7 is a plan view showing a state where the seal member of FIGS. 5 and 6 is installed in the cable insertion portion of FIG. 3;

FIG. 8 is a perspective view of a pressing member in the cable waterproof device of FIG. 1 as viewed from the back side.

9A and 9B are views for explaining an installation procedure of the cable waterproofing device of FIG. 1, wherein FIG. 9A is a sectional front view in a temporary installation state in which a load is not applied to a sealing member, and FIG. 9B is a side view in the same state. .

10A and 10B are diagrams illustrating an installation procedure of the cable waterproofing device of FIG. 1, in which FIG. 10A is a cross-sectional front view in an installation completed state in which a sealing member is compressed, and FIG. 10B is a side view in the same state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Cable waterproofing device 12 ... Equipment housing 14 ... Cable insertion part 16 ... Housing wall 18 ... Receiving part 20 ... Seal member 22 ... Pressing member 24 ... Screw hole 26 ... First part 28 ... Second part 30 ... Elastic seal Part 32 ... Penetration path 34 ... Connection part 36 ... Projection part 40 ... Cable insertion hole 42 ... Board part 44 ... Rib part 46 ... Machine screw

Continued on the front page (71) Applicant 000103976 Origin Electric Co., Ltd. 1-118-1 Takada, Toshima-ku, Tokyo (72) Inventor Kohei Komatsu 10-13 Minamicho, Hanno City, Saitama Prefecture Inside Shindengen Kogyo Co., Ltd. (72) Inventor Keiichi Hirose 2-3-1 Otemachi, Chiyoda-ku, Tokyo Within Nippon Telegraph and Telephone Corporation (72) Inventor Hitoshi Takeda 3--8-8 Minamihashimoto, Sagamihara-shi, Kanagawa Prefecture Within Sumitomo 3M Limited ( 72) Inventor Atsushi Noda 1-18-1 Takada, Toshima-ku, Tokyo Origin Electric Co., Ltd. F-term (reference) 4E352 AA01 BB02 BB07 CC02 CC12 CC22 CC34 CC53 CC56 DD05 DD15 DR02 DR26 DR40 GG04 GG12

Claims (7)

[Claims] 1. A cable waterproofing device for waterproofly sealing between a cable insertion opening of a device housing and a cable arranged in the cable insertion opening, wherein the cable waterproofing device is formed on a housing wall of the equipment housing, and each is a cable insertion opening. A plurality of receiving portions functioning as a plurality of receiving members; a plurality of sealing members individually received by the plurality of receiving portions, the plurality of sealing members having an elastic seal portion capable of being in close contact with an inner surface of the receiving portion and an outer surface of the cable; And a pressing member which is attached to the housing wall while sandwiching the plurality of seal members at a time, and presses the elastic seal portions of the plurality of seal members into the corresponding receiving portions at a time under pressure. A cable waterproof device characterized by the above-mentioned. 2. A method according to claim 1, wherein each of said plurality of receiving portions has a first portion that opens on one surface of said housing wall, and a first portion that is gradually narrower than said first portion and is formed on the other surface of said housing wall. The cable waterproof device according to claim 1, further comprising a second portion that opens. 3. The receiving portion of claim 1 wherein said first portion has a cylindrical inner surface and said second portion has a frusto-conical inner surface.
2. The cable waterproofing device according to 1. 4. Each of the plurality of seal members has an extension connected to the elastic seal portion and extending outward at one end of the seal member to engage with a surface of the housing wall. The cable waterproofing device according to any one of claims 1 to 3. 5. The cable waterproofing device according to claim 1, wherein the pressing member has a plurality of cable insertion holes of the same number and the same arrangement as the plurality of receiving portions. 6. The cable waterproofing device according to claim 1, wherein the pressing member has at least one reinforcing rib. 7. The pressing member is attached to the housing wall by a plurality of screws, and by tightening the screws, the elastic sealing portions of each of the plurality of sealing members are compressed in the corresponding receiving portions. The cable waterproofing device according to claim 1.