Sealing device

Abstract

To provide a sealing device that can improve workability.SOLUTION: A tubular sealing device 10 that is attached to wiring with a terminal fixed and seals portions of a conducting wire that makes up the wiring that are exposed from a coating includes a first inner surface 110 that is in close contact with an outer surface of the terminal and a second inner surface 120 that is in close contact with an outer surface of the coating. The tubular sealing device 10 is constructed to be tubular by combining a first part 100A and a second part 100B, which have a shape of a tubular member being divided into two parts so that the inner surface and an outer surface 150 are divided into two parts.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a sealing device. [Background technology]

[0002] In wiring with fixed terminals, a technique is known in which a heat shrink tube is used to seal the exposed portion of the conductor wire. The procedure for attaching the heat shrink tube in this technique will be described with reference to Fig. 6. Fig. 6 is a diagram showing the process of attaching the heat shrink tube according to the conventional technique.

[0003] First, the heat shrink tube 300 is attached to the wiring 20. At this time, the heat shrink tube 300 is arranged at the position of the coating 22 so that the portion of the conductor 21 protruding from the coating 22 is exposed (see FIG. 6(a)). Next, the terminal 30 is fixed to the conductor 21 by crimping (see FIG. 6(b)). After that, an adhesive (not shown) is applied to the vicinity of the exposed portion of the conductor 21, and the heat shrink tube 300 is slid by hand or the like (see FIG. 6(c)). Then, the heat shrink tube 300 shrinks due to heating, and the adhesive melts into the conductor 21 and then solidifies, thereby sealing the exposed portion of the conductor 21 (see FIG. 6(d)).

[0004] As described above, this technique requires many steps, including not only the work of attaching the heat shrink tube 300 but also the work of applying adhesive and heating. Furthermore, if the heating temperature during the heat treatment is not accurately controlled, the adhesive may not melt properly, may not penetrate into the conductor, may drip, or the heat shrink tube 300 may burn. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2008-108684 A Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention provides a sealing device that can improve workability. [Means for solving the problem]

[0007] The present invention employs the following means to solve the above problems.

[0008] That is, the sealing device of the present invention is A cylindrical sealing device that is attached to a wiring having a fixed terminal and seals a portion of a conductor that constitutes the wiring that is exposed from a coating, a first inner peripheral surface that is in close contact with an outer peripheral surface of the terminal; a second inner circumferential surface in close contact with the outer circumferential surface of the coating; With the above in mind, The cylindrical member is characterized in that it is configured to be cylindrical by combining a first part and a second part each having a shape that is divided into two parts so that the inner circumferential surface and the outer circumferential surface are divided into two parts.

[0009] Here, "the shape of a tubular member divided in two" does not mean a shape of a tubular member divided in two by cutting, but means a shape similar to that of a tubular member divided in two.

[0010] According to the present invention, the sealing device can be attached to the wiring to which the terminal is already fixed by simply assembling the sealing device by combining the first and second parts. Also, no adhesive or the like is required.

[0011] a first convex portion is provided on one side of the inner circumferential surface of the first component, the first convex portion being provided on the other side of the inner circumferential surface of the first component, the first concave portion being provided on the other side of the inner circumferential surface of the first component, The second component may have a contact surface with the first component, the contact surface being provided on one side with the inner circumferential surface therebetween with a second recess into which the first protrusion fits, and the second component may be provided on the other side with the inner circumferential surface therebetween with a second protrusion into which the first recess fits.

[0012] This makes it possible to fix the first component and the second component by recess-projection fitting.

[0013] The protruding amount of the first convex portion is preferably greater than the depth of the second concave portion, and the protruding amount of the second convex portion is preferably greater than the depth of the first concave portion.

[0014] This can improve the sealing performance of the recessed and protruding fitting portion.

[0015] The first part and the second part may preferably be parts having the same size and shape.

[0016] In this way, there is no need to manufacture multiple types of parts.

[0017] The terminal is configured to be mounted in a housing case, and the first and second components may have outer circumferential surfaces provided with seal projections that fit tightly against an inner circumferential surface of the housing case.

[0018] This makes it possible to seal the annular gap between the housing case and the wiring.

[0019] It is preferable that the seal projection is the only contact portion between the first component and the second component and the inner circumferential surface of the housing case.

[0020] This makes it possible to prevent the force required when assembling the sealing device into the housing case from becoming too high.

[0021] The above configurations may be combined as much as possible. Effect of the Invention

[0022] As described above, according to the present invention, it is possible to improve workability. [Brief description of the drawings]

[0023] [Figure 1] FIG. 1 is an external view of a sealing device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a process diagram showing the installation of the sealing device according to the embodiment of the present invention. [Diagram 3] FIG. 3 is a schematic cross-sectional view showing a state in which the sealing device according to the embodiment of the present invention is mounted on a housing case. [Figure 4] FIG. 4 is an external view of a sealing device according to a modified example of the present invention. [Diagram 5] FIG. 5 is a mounting process diagram of a sealing device according to a comparative example. [Figure 6] FIG. 6 is a diagram showing a process for attaching a heat shrink tube according to the prior art. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] Hereinafter, the embodiment of the present invention will be described in detail with reference to the drawings. However, unless otherwise specified, the dimensions, materials, shapes, relative positions, etc. of the components described in the embodiment do not limit the scope of the present invention to those. It is not intended to do so.

[0025] (Example) A sealing device according to an embodiment of the present invention will be described with reference to Figs. 1 to 3. Fig. 1 is an external view of a sealing device according to an embodiment of the present invention. Fig. 1(a) is a plan view of the sealing device, Fig. 1(b) is a plan view showing a state before a first part and a second part constituting the sealing device are assembled, and Fig. 1(c) is a side view (showing the inner peripheral surface side) of the first part and the second part. Fig. 2 is an installation process diagram of the sealing device according to an embodiment of the present invention. Fig. 3 is a schematic cross-sectional view showing a state in which the sealing device according to the embodiment of the present invention is mounted on a housing case.

[0026] <Sealing device> The sealing device 10 according to this embodiment is attached to the wiring 20 (see FIG. 2(b)) to which the terminal 30 is fixed, and is used to seal the portion of the conductor 21 exposed from the coating 22. The sealing device 10 has a cylindrical shape and is made of an elastomer material. Specific examples of the elastomer material include EPDM, VMQ, ACM, and IIR. In addition, NBR, HNBR, FKM, CR, SBR, and AU can also be used as the elastomer material. In addition, the sealing device 10 has a first inner peripheral surface 110 that is in close contact with the outer peripheral surface of the terminal 30, and a second inner peripheral surface 120 that is in close contact with the outer peripheral surface of the coating 22. This allows the portion of the conductor 21 exposed from the coating 22 to be sealed. The sealing device 10 of this embodiment is configured to be cylindrical by combining a first part 100A and a second part 100B, which have a shape obtained by dividing a cylindrical member into two parts, so that the inner surface (first inner surface 110 and second inner surface 120) and the outer surface 150 are divided into two parts.

[0027] In this embodiment, the first part 100A and the second part 100B are parts with the same dimensions and shape, and are composed of the same parts. This eliminates the need to manufacture multiple types of parts, and only requires manufacturing one type of part. The first part 100A and the second part 100B can be manufactured using a known molding technique, and therefore can be obtained by molding using one type of mold.

[0028] The contact surface of the first part 100A with the second part 100B is provided with a convex part 130 as a first convex part on one side with the inner circumferential surface (first inner circumferential surface 110 and second inner circumferential surface 120) between them, and a concave part 140 as a first concave part on the other side. The contact surface of the second part 100B with the first part 100A is provided with a concave part 140 as a second concave part into which the first convex part (convex part 130) fits on one side with the inner circumferential surface between them, and a convex part 130 as a second convex part into which the first concave part (convex part 140) fits on the other side. The protrusion amount of the first convex part is configured to be larger than the depth of the second concave part, and the protrusion amount of the second convex part is configured to be larger than the depth of the first concave part. That is, in this embodiment, as described above, since the first part 100A and the second part 100B are the same part, the protrusion amount A of the convex part 130 is configured to be larger than the depth B of the concave part 140 (see FIG. 1(b)). In FIG. 1(b), the recess 140 is shown in perspective by dotted lines.

[0029] Moreover, the outer peripheral surface 150 of the sealing device 10 according to this embodiment is configured as a tapered surface whose outer diameter gradually increases from the first inner peripheral surface 110 side toward the second inner peripheral surface 120 side. Furthermore, a plurality of annular seal projections 151, 152, and 153 are provided on this outer peripheral surface 150. These are configured to satisfy the relationship of outer diameter of seal projection 151<outer diameter of seal projection 152<outer diameter of seal projection 153.

[0030] <Sealing device installation procedure> First, a part of the coating 22 of the wiring 20 is removed to expose a part of the conductor 21 (see FIG. 2(a)). Then, a terminal 30 is applied to the exposed part of the conductor 21. The sealing device 10 is fixed by tightening (see FIG. 2(b)). In the figure, reference numeral 31 denotes a tightening portion. Next, one of the two components constituting the sealing device 10 (for example, the first component 100A) is fitted to the wiring 20. At this time, the first component 100A is arranged so that the first inner peripheral surface 110 is in close contact with the outer peripheral surface of the terminal 30 and the second inner peripheral surface 120 is in close contact with the outer peripheral surface of the coating 22 (see FIG. 2(c)). Then, the sealing device 10 is attached to the wiring 20 by assembling and attaching the second component 100B to the first component 100A (see FIG. 2(d)). The first component 100A and the second component 100B are fixed to each other by a recessed / recessed fit between a protruding portion 130 and a recessed portion 140 provided on each component.

[0031] Here, the above-mentioned terminal 30 is configured to be mounted in a housing case 40 as shown in FIG. 3. The housing case 40 is a cylindrical member having a first inner peripheral surface 41 in which the terminal 30 is accommodated and a second inner peripheral surface 42 in which the sealing device 10 is accommodated. The second inner peripheral surface 42 is configured as a tapered surface that expands in diameter from the first inner peripheral surface 41 side toward the opposite side. The first part 100A and the second part 100B constituting the sealing device 10 are provided on their outer peripheral surfaces with seal protrusions 151, 152, and 153 that are in close contact with the inner peripheral surface (second inner peripheral surface 42) of the housing case 40. The first part 100A and the second part 100B are configured to contact the inner peripheral surface (second inner peripheral surface 42) of the housing case 40 only with the seal protrusions 151, 152, and 153 (see FIG. 3). 3 shows a cross-sectional view of the housing case 40 made of a cylindrical member cut vertically in half, and also shows a side view of the wiring 20 to which the terminal 30 is fixed and the sealing device 10. In this embodiment, since the outer peripheral surface 150 of the sealing device 10 is formed of a tapered surface and the outer diameters of the seal projections 151, 152, and 153 are in the above-mentioned relationship, the wiring 20 with the terminal 30 to which the sealing device 10 is attached can be smoothly and easily inserted into the housing case 40.

[0032] <Advantages of the sealing device according to this embodiment> According to the present invention, the sealing device 10 can be attached to the wiring 20 to which the terminal 30 is already fixed, simply by assembling the sealing device 10 in a manner similar to combining the first part 100A and the second part 100B. In addition, no adhesive or the like is required. Therefore, the number of work steps is reduced, and since no heat treatment is required as in the case of using a heat shrink tube, there is no need to manage the heating temperature, and there are no various problems that arise when an adhesive is used. As a result, the workability can be improved.

[0033] In this embodiment, the first part 100A and the second part 100B can be easily assembled (combined) by the concave-convex fitting. In addition, the protrusion amount of the first convex part is greater than the depth of the second concave part, and the protrusion amount of the second convex part is greater than the depth of the first concave part, so that the sealing performance of the concave-convex fitting part can be improved. By adopting such a configuration, depending on the material of the sealing device 10, it is considered that a gap may be generated in a part of the contact surface between the first part 100A and the second part 100B other than the concave-convex fitting part due to the repulsive force of the first convex part and the second convex part. However, by mounting the sealing device 10 to the housing case 40, the seal projections 151, 152, and 153 are pressed against the inner peripheral surface (second inner peripheral surface 42) of the housing case 40, so that the sealing device 10 is pressed radially inward over the entire circumference. This prevents gaps from being formed in the contact surfaces between the first part 100A and the second part 100B in areas other than the concave-convex fitting, and sufficient sealing performance is obtained. In this manner, in this embodiment, a configuration is adopted in which the protrusion amount of the first convex part is greater than the depth of the second concave part, and the protrusion amount of the second convex part is greater than the depth of the first concave part. However, a configuration in which the protrusion amount of the first convex part is equal to or less than the depth of the second concave part, and the protrusion amount of the second convex part is equal to or less than the depth of the first concave part, may be adopted. By adopting such a configuration, no gaps are formed in the contact surfaces between the first part 100A and the second part 100B in areas other than the concave-convex fitting due to the repulsive force of the first convex part and the second convex part.

[0034] In this embodiment, the first part 100A and the second part 100B are composed of parts with the same dimensions and shape. This eliminates the need to manufacture multiple types of parts, and only requires manufacturing one type of part. Therefore, these can be obtained by molding using one type of mold.

[0035] Furthermore, in this embodiment, the outer peripheral surfaces of the first part 100A and the second part 100B are provided with seal protrusions 151, 152, and 153 that are in close contact with the inner peripheral surface (second inner peripheral surface 42) of the housing case 40. This allows the annular gap between the housing case 40 and the wiring 20 to be sealed. Therefore, it can be used as a so-called waterproof connector. Also, in this embodiment, the contact parts of the first part 100A and the second part 100B with the inner peripheral surface (second inner peripheral surface 42) of the housing case 40 are configured to be only the seal protrusions 151, 152, and 153. This makes it possible to prevent the force required to incorporate the sealing device 10 into the housing case 40 from becoming too high. Therefore, the insertion workability of the sealing device 10 into the housing case 40 is also excellent.

[0036] <Modifications of the first and second parts> With reference to Fig. 4, modified examples of the first and second parts will be described. Note that the first and second parts are the same parts even in the modified examples. Therefore, for convenience, the configuration of the first part related to the modified examples will be described. Note that in Fig. 4, the configuration and operation are the same as those of the embodiment except for some configurations described below, so the same components are denoted by the same reference numerals and their description will be omitted.

[0037] In the above-mentioned first and second parts, the convex portion 130 and the concave portion 140 are configured by linear portions, but the shapes of the convex portion and the concave portion are not limited. For example, as in the first part 100X shown in Fig. 4(a), a configuration in which the convex portion 130X and the concave portion 140X having a plurality of portions branching out from the linear portion can be adopted. This can further increase the convex-concave fitting force and also improve the positioning accuracy of the first and second parts.

[0038] Also, as shown in FIG. 4(b) in the first component 100Y, a configuration may be adopted in which the first inner circumferential surface 110 is provided with seal protrusions 111, 112 protruding inward, or the second inner circumferential surface 120 is provided with a seal protrusion 121 protruding inward. In general, the surface pressure peak is higher and the sealability can be improved by contacting the seal protrusion with the mating surface than by closely contacting the surfaces. Therefore, the sealability can be improved by adopting a configuration in which the annular seal protrusions 111, 112 are contacted with the terminal 30, or a configuration in which the annular seal protrusion 121 is contacted with the coating 22 of the wiring 20.

[0039] It is also possible to adopt a configuration in which the sealing protrusions 111 and 112 are provided but the sealing protrusion 121 is not provided, or to adopt a configuration in which the sealing protrusion 121 is provided but the sealing protrusions 111 and 112 are not provided. The number of sealing protrusions is not limited to the example shown in the figure. In addition, the modified example described with reference to Fig. 4(a) and the modified example described with reference to Fig. 4(b) can be combined.

[0040] <Comparative Example> A comparative example will be described with reference to Fig. 5. As described above, in the sealing device 10 according to this embodiment, the first part 100A and the second part 100B are combined to form a cylindrical shape. However, it is also possible to form a sealing device having the same structure (shape) as this sealing device 10 from a single member. Fig. 5 shows an installation process in the case where such a sealing device 10Z is adopted. Note that the sealing device 10Z is formed from a single member. Only the sealing device 10 differs.

[0041] When the sealing device 10Z according to this comparative example is used, first, the sealing device 10Z is attached to the wiring 20. At this time, the sealing device 10Z is disposed at the position of the coating 22 so that the portion of the conductor 21 protruding from the coating 22 is exposed (see FIG. 5(a)). Next, the terminal 30 is fixed to the conductor 21 by crimping (see FIG. 5(b)). Thereafter, the sealing device 10Z can be attached to a desired position by sliding the sealing device 10Z manually or the like (see the arrow S in FIG. 5(c)) (see FIG. 5(d)).

[0042] In the case of this comparative example, the number of installation steps is greater than in this embodiment, and the sealing device 10Z needs to be slid against the wiring 20 and terminal 30, resulting in inferior workability compared to this embodiment.

[0043] (others) In the above embodiment, the first part and the second part are fixed by a recess-projection fitting, but the fixing structure of the first part and the second part in the present invention is not limited to this, and various known techniques may be adopted. Furthermore, in the above embodiment, the first part and the second part are configured by the same part, but the first part and the second part may be configured by different parts. [Explanation of symbols]

[0044] 10: Sealing device 100A, 100X, 100Y: 1st part 100B: 2nd part 110: First inner circumferential surface 111, 112: Seal protrusion 120: second inner peripheral surface 121: Seal protrusion 130, 130X: Convex 140,140X:Concave 150: Outer surface 151, 152, 153: Seal protrusion 20: Wiring 21: Conductor 22: Covering 30: Terminal 40: Housing case 41: First inner peripheral surface 42: second inner peripheral surface

Claims

1. A cylindrical sealing device that is attached to a wiring having a fixed terminal and seals a portion of a conductor that constitutes the wiring that is exposed from a coating, a first inner peripheral surface that is in close contact with an outer peripheral surface of the terminal; a second inner circumferential surface in close contact with the outer circumferential surface of the coating; With the above in mind, A sealing device characterized in that the cylindrical member is formed into a cylindrical shape by combining a first part and a second part having a shape that is divided into two parts so that the inner and outer surfaces are divided into two parts.

2. a first convex portion is provided on one side of a contact surface of the first component with respect to the second component, and a first concave portion is provided on the other side of the inner circumferential surface, The sealing device according to claim 1, characterized in that a second recess into which the first convex portion fits is provided on one side of the contact surface of the second part with the first part, with the inner circumferential surface sandwiched therebetween, and a second convex portion into which the first recess fits is provided on the other side.

3. 3. The sealing device according to claim 2, wherein a protruding amount of the first convex portion is greater than a depth of the second concave portion, and a protruding amount of the second convex portion is greater than a depth of the first concave portion.

4. 4. The sealing device according to claim 1, 2 or 3, wherein the first part and the second part are parts having the same size and shape.

5. 4. A sealing device as described in claim 1, 2 or 3, characterized in that the terminal is configured to be attached to a housing case, and the outer peripheral surfaces of the first part and the second part are provided with sealing protrusions that are in close contact with the inner peripheral surface of the housing case.

6. 6. The sealing device according to claim 5, wherein the seal projection is the only contact portion between the first component and the second component and the inner peripheral surface of the housing case.

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