JP2017098055A - Seal member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seal member capable of presenting sealability immune to a pressure of high-pressure water or the like, and much more improving a seal performance.SOLUTION: The present invention relates to a seal member 10 configured by mounting an elastic material 15 around an outer peripheral surface 11a and an inner peripheral surface 11b of a rigid and cylindrical skeleton member 11. On the outer peripheral surface 11a and the inner peripheral surface 11b of the skeleton member 11, a plurality of lines of annular projections 14a and 14b are integrally and protrusively formed. The elastic material 15 is mounted around the outer peripheral surface 11a and the inner peripheral surface 11b of the skeleton member 11 including the plurality of lines of annular projections 14a and 14b. An outer peripheral seal lip part 16 is formed from tthe annular projection 14a at an outer peripheral side and a rubber material 15 that is fitted around the annular projection 14a. An inner peripheral seal lip part 17 is formed from the annular projection 14b at an inner peripheral side and a rubber material 15 that is fitted around the annular projection 14b.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sealing member for a waterproof connector that seals a gap between a cavity of a connector housing and an electric wire, for example.

  As a rubber plug (seal member) for this type of waterproof connector, there is one disclosed in Patent Document 1.

  As shown in FIG. 3, the rubber plug 1 has a substantially cylindrical shape in which an electric wire insertion hole (inner peripheral surface) 1b for passing an electric wire (not shown) is provided in the front-rear direction (axial direction). A crimping portion 2 that is crimped to the insulation coating of the electric wire by an insulation coating crimping portion of the terminal that is not connected, and an inner periphery of a cavity of a connector housing of a waterproof connector (not shown) provided on the rear surface of the crimping portion 2 A front seal portion 3 that is in close contact with the surface, a rear seal portion 4 that is provided continuously to the rear of the front seal portion 3 and that is in close contact with the outer peripheral surface of the electric wire and the inner peripheral surface of the cavity, and the rear seal portion 4 A follower 5 provided continuously to the rear is integrally provided.

  And the thickness of the crimping | compression-bonding part 2 becomes small gradually, so that it goes to the front, and it becomes small rapidly by the front-end taper surface 2a. In the front seal portion 3, the outer peripheral lip portion 3a disposed on the outer peripheral surface 1a side and the inner peripheral lip portion 3b disposed on the inner peripheral surface 1b side are disposed at the same position in the front-rear direction, and the rear seal In the portion 4, the outer peripheral lip portion 4a disposed on the outer peripheral surface 1a side and the inner peripheral lip portion 4b disposed on the inner peripheral surface 1b side are disposed at positions shifted in the front-rear direction. Further, the follower 5 has a cylindrical shape having a wire guiding surface 5a on the rear end side of the inner peripheral surface 1b, and the crimping portion so that the outer peripheral surface 1a contacts the inner peripheral surface of the cavity of the connector housing. It is formed thicker than 2. As a result, the followability to the bending of the electric wire is improved while preventing an increase in insertion force into the cavity.

JP 2013-152803 A JP 2011-18549 A Japanese Patent Laid-Open No. 10-32288

  However, in the rubber plug 1 as the conventional sealing member, since the entire plug is made of a low-hardness elastic material such as silicone rubber, for example, when an electric wire receives a tensile pressure or pressure such as high-pressure washing water In this case, the lip portions 3a, 3b, 4a and 4b of the seal portions 3 and 4 are tilted and deformed by the pressure, or are expanded and expanded in the axial direction, so that high sealing performance cannot be maintained. The seal performance deteriorated.

  Accordingly, the present invention has been made to solve the above-described problems, and provides a sealing member that can exhibit a sealing property that can withstand pressure such as high-pressure water and can further improve the sealing performance. The purpose is to do.

  The invention according to claim 1 is a sealing member in which an elastic material is circumferentially attached to the inner and outer peripheral surfaces of a rigid and cylindrical skeleton member, and a plurality of annular protrusions project from the inner and outer peripheral surfaces of the skeleton member. The elastic material is circumferentially attached to the inner and outer peripheral surfaces of the skeleton member including a plurality of annular protrusions, and a seal portion is formed by the annular protrusion and the elastic material that is circumferentially attached to the annular protrusion. To do.

  Invention of Claim 2 is the sealing member of Claim 1, Comprising: An annular plate-like flange part protrudes from the edge part of the said skeleton member, The said skeleton member including this annular plate-like flange part is provided. The elastic material is attached to inner and outer peripheral surfaces.

  Invention of Claim 3 is the sealing member of Claim 1 or 2, Comprising: The said elastic material was circumscribed by the coating or integral molding on the inner peripheral surface of the said skeleton member, and the whole front-and-back surface. To do.

  As described above, according to the invention of claim 1, a rigid and cylindrical skeleton member is used as a core portion, and a plurality of annular projections are projected from the inner and outer peripheral surfaces of the rigid and cylindrical skeleton member, By attaching an elastic material to the inner and outer peripheral surfaces of the skeleton member including the plurality of annular protrusions, and forming a seal portion with the annular protrusion and the elastic material peripherally attached to the annular protrusion, some pressure is applied. Even when the seal acts on the seal portion, it is possible to suppress and prevent axial expansion (expansion) and collapse (deformation) of the seal portion, thereby improving the sealing performance.

  According to invention of Claim 2, the annular plate-shaped flange part protruded from the edge part of the skeleton member, and the elastic material was put on the inner and outer peripheral surfaces of the skeleton member including the annular plate-shaped flange part. Because of this, when used as a waterproof connector that seals the gap between the cavity of the connector housing and the wire, the cavity and flange will interfere even when subjected to tensile pressure in the bending direction of the wire. Can be reliably prevented, and the sealing performance can be further improved. In addition, since the high pressure cleaning water is received by the flange portion at the time of high pressure cleaning, it is possible to prevent water from being directly applied to the sealing portion, and from this point, the sealing performance can be further improved.

  According to the invention of claim 3, the sealing performance can be further improved with a simple structure by applying the elastic material to the entire inner and outer peripheral surfaces and front and rear surfaces of the skeleton member by coating or integral molding. it can.

It is sectional drawing which shows the sealing member for waterproof connectors of one Embodiment of this invention. It is sectional drawing which shows the use condition of the said sealing member. It is sectional drawing of the rubber stopper as a sealing member for the conventional waterproof connector.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view showing a seal member for a waterproof connector according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing a use state of the seal member.

  As shown in FIG. 2, the sealing member 10 is accommodated in the cavity 22 from the opening surface 23 side of the cavity 22 of the connector housing 21 of the waterproof connector 20 and seals a gap between the sealing member 10 and the electric wire 30. As shown in FIG. 1, a rigid and cylindrical skeleton member 11 serving as a core portion is provided. That is, the skeleton member 11 is formed in a rigid and cylindrical shape from a hard (high hardness) synthetic resin material.

  As shown in FIG. 1, a front flange portion 12 having an arcuate cross section is integrally formed in an annular shape at the front end portion of the outer peripheral surface 11 a of the skeleton member 11, and the rear end portion (end portion) of the outer peripheral surface 11 a. An annular plate-like rear flange portion (ring plate-like flange portion) 13 is integrally formed to project. Further, at the center of the outer peripheral surface 11a and the inner peripheral surface 11b of the skeleton member 11, a plurality of (three in the case of this embodiment) mountain-shaped annular projections 14a and 14b are formed integrally protruding at equal intervals. is there. The annular protrusion 14a on the outer peripheral side has a larger mountain shape than the annular protrusion 14b on the inner peripheral side, and the annular protrusions 14a and 14b are arranged at the same position in the front-rear direction (axial direction).

  Further, a rubber material (elastic material) 15 such as silicon rubber is circumferentially coated on the outer peripheral surface 11a, inner peripheral surface 11b, front surface 11c, and rear surface 11d of the cylindrical skeleton member 11 by coating. . An outer peripheral seal lip portion 16 as a seal portion is formed by the annular protrusion 14a on the outer peripheral side and the rubber material 15 that is circumferentially attached to the annular protrusion 14a, and is attached to the annular protrusion 14b on the inner peripheral side and the annular protrusion 14b. The rubber material 15 thus formed forms an inner peripheral seal lip portion 17 as a seal portion.

  In addition, as shown in FIG. 2, the terminal 40 accommodated in the cavity 22 of the connector housing 21 together with the sealing member 10 attached to the insulating coating 31 at one end on the exposed core wire 32 side of the electric wire 30 has a cylindrical shape. The terminal connection part 41 to be formed, the core wire crimping part 42 to be crimped to the exposed core wire 32 of the electric wire 30, and the insulation coating crimping part 43 to be crimped to the rear of the front flange part 12 of the seal member 10 are provided.

  According to the sealing member 10 of the embodiment described above, a plurality of annular projections 14a and 14b are integrally formed on the outer peripheral surface 11a and the inner peripheral surface 11b of the rigid and cylindrical skeleton member 11, and the plurality of annular projections 14a. , 14b, and the outer peripheral surface 11a and the inner peripheral surface 11b of the skeleton member 11 are circumferentially attached to form a plurality of outer peripheral seal lip portions 16 and inner peripheral seal lip portions 17 in FIG. As shown, the outer peripheral seal lip portion 16 can reliably seal the gap between the cavity 22 of the connector housing 21 of the waterproof connector 20 and the outer peripheral surface of the seal member 10, and the inner peripheral seal lip portion 17. Thus, the gap between the inner peripheral surface of the seal member 10 accommodated in the cavity 22 and the insulating coating 31 of the electric wire 30 can be reliably sealed.

  In this way, a rigid and cylindrical skeleton member 11 is used as a core, and a plurality of annular protrusions 14a and 14b are integrally formed on the outer peripheral surface 11a and the inner peripheral surface 11b of the rigid and cylindrical skeleton member 11, respectively. The rubber material 15 is attached to the outer peripheral surface 11a and the inner peripheral surface 11b of the skeleton member 11 including the plurality of annular protrusions 14a and 14b, and the plurality of annular protrusions 14a and 14b around which the rubber material 15 is attached. By forming the plurality of outer peripheral seal lip portions 16 and the inner peripheral seal lip portion 17, the axial direction of each seal lip portion 16, 17 can be obtained even when any pressure acts on the seal lip portions 16, 17. The expansion (expansion) and collapse (deformation) of the seal member 10 can be suppressed and prevented, and the sealing performance of the seal member 10 can be improved.

  Further, an annular plate-like rear flange portion 13 is integrally formed at the rear end portion of the rigid and cylindrical skeleton member 11, and the outer periphery of the skeleton member 11 including the annular plate-like rear flange portion 13 is formed. A rubber material 15 is circumferentially attached to the surface 11a and the inner peripheral surface 11b, and a plurality of outer peripheral seal lip portions 16 and inner peripheral seal lip portions 17 are formed by a plurality of annular protrusions 14a and 14b that surround the rubber material 15, respectively. As a result, even if a tensile pressure in the bending direction of the electric wire 30 is received, the cavity 22 of the connector housing 21 of the waterproof connector 20 and the rear flange portion 13 interfere with each other as shown in FIG. Further, deformation of the inner peripheral seal lip portion 17 can be reliably prevented, and the sealing performance of the seal member 10 can be further improved. Further, at the time of high pressure cleaning, as indicated by an arrow P in FIG. 2, since the high pressure cleaning water is directly received by the rear flange portion 13, it is possible to surely prevent the respective seal lip portions 16 and 17 from being directly wet. From this point, the sealing performance of the sealing member 10 can be further improved.

  Furthermore, the rubber member 15 is circumferentially coated on the entire outer peripheral surface 11a, inner peripheral surface 11b, front surface 11c, and rear surface 11d of the skeleton member 11, thereby further improving the sealing performance of the seal member 10 with a simple structure. Can be improved.

  In addition, according to the said embodiment, although the frame | skeleton member used as a core part was formed with the hard synthetic resin material, you may form with a metal etc.

  Further, according to the embodiment, the rubber material as the elastic material is coated on the entire surface of the skeleton member. However, the rubber material may be integrally formed on the entire surface of the skeleton member, and the elastic material is not limited to the rubber material. An elastomer or a soft resin material may be used.

  Further, according to the above embodiment, the skeleton member is formed in a cylindrical shape to seal one electric wire, but the skeleton member is formed in an elliptical cylinder shape to seal a plurality of electric wires. Also good.

  Furthermore, according to the embodiment, the case where the seal member is used for the waterproof connector has been described. However, it is needless to say that the seal member can be applied to a rubber plug, a packing, or the like other than the waterproof connector.

10 Seal member 11 Rigid and cylindrical skeleton member (Rigid and cylindrical skeleton member)
11a outer peripheral surface 11b inner peripheral surface 11c front surface 11d rear surface 13 annular plate-shaped rear flange portion (ring plate-shaped flange portion)
15 Rubber material (elastic material)
16 Outer seal lip (seal part)
17 Inner seal lip (seal part)

Claims (3)

A seal member in which an elastic material is attached to the inner and outer peripheral surfaces of a rigid and cylindrical skeleton member,
A plurality of annular protrusions project from the inner and outer peripheral surfaces of the skeleton member, and the elastic material is attached to the inner and outer peripheral surfaces of the skeleton member including the plurality of annular protrusions. A seal member, wherein a seal portion is formed with the elastic material that is circumferentially attached. The seal member according to claim 1,
An annular plate-like flange portion projects from an end portion of the skeleton member, and the elastic material is attached to the inner and outer peripheral surfaces of the skeleton member including the annular plate-like flange portion. . The sealing member according to claim 1 or 2,
A sealing member, wherein the elastic material is circumferentially attached to the entire inner and outer peripheral surfaces and front and rear surfaces of the skeleton member by coating or integral molding.

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