CN112787282A

CN112787282A - Sealing block

Info

Publication number: CN112787282A
Application number: CN201911088485.3A
Authority: CN
Inventors: 蒋奕青
Original assignee: Wuxi Nok Freudenberg Oilseal Co Ltd
Current assignee: Wuxi Nok Freudenberg Oilseal Co Ltd
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2021-05-11

Abstract

The invention provides a sealing block which can be used regardless of the shape of a wire. The seal block (1) has a pair of base portions (2, 3) formed of an elastic body. The pair of base portions (2, 3) have the same inner surface structure (4). The inner side surface structures (4) respectively have contact surfaces (10) extending on the same surface, and have guide grooves (20) which are grooves recessed from the contact surfaces (10) and extending in one direction. The contact surfaces (10) of the pair of inner side surface structures (4) are in contact with each other.

Description

Sealing block

Technical Field

The present invention relates to a sealing block, and more particularly, to a sealing block for sealing a passage through which a wire passes.

Background

In vehicles, general-purpose machines, batteries, and the like, wires such as wire harnesses are used for energization. When the wire is used for, for example, energization between the inside and the outside of the sealed space, a seal block is used in order to achieve sealing of a communication hole that communicates the inside of the sealed space through which the wire passes with the outside. The seal block is a member integrally molded from an elastic body such as rubber, and seals a space between the lead wire and the communication hole. Specifically, a guide hole, which is a through hole through which a lead wire passes, is formed inside the seal block, and the outer peripheral surface of the seal block is in contact with the inner peripheral surface of a communication hole through which the lead wire passes and which is formed in the housing or the like. The guide hole of the sealing block contacts the conductive line. In this manner, the seal block contacts the lead wire in the guide hole and contacts the communication hole on the outer circumferential surface, thereby sealing the space between the lead wire and the communication hole, thereby forming a sealed space within the housing.

Prior Art

Patent document

[ patent document 1 ]: CN106099522A

Disclosure of Invention

(problems to be solved by the invention)

When the lead is a wire harness formed by bundling a plurality of wires such as a wire harness, a plurality of guide holes corresponding to the respective wires of the wire harness are provided in the sealing block, and one wire is passed through one guide hole. However, the wire harness provided with the connector at the tip end cannot separate the wires, and thus cannot pass through the respective wires in the corresponding guide holes of the seal block. Further, when the wire tip is thickened due to the connector or the like provided at the wire tip, the wire may not be inserted into the guide hole of the seal block. Therefore, the conventional sealing block cannot be used for a wire in which a plurality of wires cannot be separated from each other, such as a wire harness to which a connector is attached, and cannot be used for a wire or a wire harness whose tip is thickened.

As described above, the conventional sealing block is required to have a structure of the sealing block that can be used regardless of the form of the wire.

The present invention has been made in view of the above problems, and an object thereof is to provide a sealing block that can be used regardless of the wire form.

(means for solving the problems)

In order to achieve the above object, a seal block according to the present invention for sealing a passage through which a lead wire passes includes a pair of base portions formed of an elastic body, the pair of base portions having the same inner side surface structure, the inner side surface structure having contact surfaces extending on the same surface, and at least one guide groove that is a groove recessed from the contact surfaces and extending in one direction, the contact surfaces of the pair of inner side surface structures being in contact with each other.

In the seal block according to one aspect of the present invention, the guide groove has at least one protruding portion that protrudes in a direction intersecting an extending direction of the guide groove and extends around the extending direction.

In the seal block according to one aspect of the present invention, the protrusion has, at a distal end thereof: a surface for forming a part of the cylindrical surface extending in the extending direction.

In the seal block according to one aspect of the present invention, the inner surface structure has at least two protrusions protruding from the contact surface, and recesses that are the same in number as the protrusions and can accommodate the protrusions and are recessed from the contact surface, respectively, and the protrusions and the recesses are arranged in the inner surface structure such that the protrusions of one of the pair of base portions can be accommodated in the recesses of the other of the pair of base portions, respectively.

In the seal block according to one aspect of the present invention, the guide groove is symmetrical in the extending direction in the inner surface structure, and a pair of one projection and one recess is formed in the inner surface structure, and the pair of the projection and the recess are located at symmetrical positions in the extending direction.

(effect of the invention)

According to the seal block of the present invention, it is possible to use the seal block regardless of the wire form.

Drawings

Fig. 1 is a perspective view showing a schematic structure of a seal block according to an embodiment of the present invention.

Fig. 2 is an exploded perspective view of the seal block shown in fig. 1.

Fig. 3 is a plan view of the base portion of the seal block shown in fig. 1.

Fig. 4 is a front view of the base portion of the seal block shown in fig. 1.

Fig. 5 is a side view of the base portion of the seal block shown in fig. 1.

Fig. 6 is a perspective view of the sealing block showing a state in which the sealing block is mounted in the wire.

Fig. 7 is a view showing the seal block in a state of being attached to the communication hole of the housing.

Fig. 8 is a sectional view of a section taken along line a-a of fig. 7.

Detailed Description

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

Fig. 1 is a perspective view illustrating a schematic structure of a seal block 1 according to an embodiment of the present invention, and fig. 2 is an exploded perspective view of the seal block 1. Fig. 3 is a plan view of the base portion of the seal block 1, fig. 4 is a front view of the base portion of the seal block 1, and fig. 5 is a side view of the base portion of the seal block 1. The sealing block 1 is used to seal a passage through which a lead wire passes, for example, a communication hole of a case through which the lead wire passes, and the lead wire can electrically connect between the inside and the outside of the case of the lithium ion battery.

The seal block 1 has a pair of

base portions

2 and 3 formed of an elastic body. The pair of

base portions

2 and 3 have the same inner surface structure 4. The inner side surface structures 4 each have a contact surface 10 extending on the same surface, and have at least one guide groove 20 which is a groove recessed from the contact surface 10 and extending in one direction (extending direction x). The contact surfaces 10 of the pair of inner side structures 4 contact each other. The structure of the seal block 1 will be described in detail below.

As shown in fig. 1 and 2, the base body 2 and the base body 3 have the same shape and size, and are formed by, for example, the same molding die. As described above, the

base portions

2 and 3 are formed of an elastic body, and examples of the elastic body forming the

base portions

2 and 3 include rubber. The

base portions

2 and 3 have a block shape. Since the

base portions

2 and 3 are the same, hereinafter, only the structure of the base portion 2 will be specifically described, and the description of the base portion 3 will be omitted, but the base portion 3 also has the same structure as the base portion 2.

As shown in fig. 2 to 5, the base portion 2 is a rectangular parallelepiped rubber block and has a sealing surface 30 as a surface formed to face away from the inner surface structure 4. The sealing surface 30 extends along the inner lateral surface structure 4 and is connected at both ends to the inner lateral surface structure 4. The seal surface 30 is formed to contact the inner peripheral surface of the passage hole to be sealed in a state where the seal block 1 described later is used.

As shown in fig. 1 and 2, in the seal block 1, the inner side surface structures 4 are portions that come into contact with each other when the base body 2 and the base body 3 are superposed, and specifically, form a part of the outer side surface of the base body 2. The contact surface 10 extends, for example, in a plane or substantially in a plane. The contact surface 10 is divided into a plurality of sections by the guide groove 20 as described below.

The guide groove 20 is a groove-like portion recessed from the contact surface 10 toward the inside of the base portion 2, and extends in a predetermined direction (extending direction x). The guide grooves 20 face the corresponding guide grooves 20 of the base body 3 when the base body 2 and the base body 3 are superposed, and form guide holes 5 as through holes penetrating the seal block 1 in the extending direction x. The guide hole 5 is a cylindrical hole through which an electric wire of a lead wire passes as described below, and has a shape corresponding to a cross-sectional shape orthogonal to an extending direction of the electric wire. The cross-sectional profile of the guide groove 20 orthogonal to the extending direction x is formed in the following shape: the cross-sectional profile of the guide hole 5 corresponding to the cross-sectional shape of the electric wire can be formed when the guide groove 20 of the corresponding base body 3 is overlapped therewith. For example, in order to make the cross-sectional profile of the guide hole 5 orthogonal to the extending direction x circular or substantially circular, the cross-sectional profile of the guide groove 20 orthogonal to the extending direction x is semicircular or substantially semicircular.

The guide groove 20 has at least one protrusion 21. The protruding portion 21 protrudes in a direction intersecting the extending direction x of the guide groove 20 and extends around the extending direction x. When the guide grooves 20 are overlapped with the guide grooves 20 of the corresponding base portion 3, the protruding portions 21 are connected to the protruding portions 21 of the guide grooves 20 of the corresponding base portion 3, and form annular protruding portions. Specifically, as shown in fig. 3, the protrusion 21 protrudes into the guide groove 20 and extends in an arc shape or an arc shape along the groove surface 20a of the guide groove 20. The protruding portion 21 extends from one end edge 20b of the guide groove 20 to the other end edge 20c of the guide groove 20. The end edges 20b and 20c of the guide groove 20 are portions where the groove surface 20a connects the contact surface 10. The protruding portion 21 is formed, for example, in a direction orthogonal to the extending direction x of the guide groove 20.

As shown in fig. 3, the protruding portion 21 has a support surface 22 at its front end, and the support surface 22 is a surface forming a part of a cylindrical surface extending in the extending direction x. The support surface 22 has a shape to contact the electric wire passing through the guide hole 5 of the sealing block 1. The support surface 22 is, for example, a semi-cylindrical surface, and linearly extends in a cross section along the extending direction x. Further, the protrusion 21 protrudes from the groove surface 20a in such a manner that the support surface 22 is pressed by the electric wire passing through the guide hole 5 of the seal block 1. The support surface 22 is connected to the support surface 22 of the guide groove 20 of the corresponding base portion 3 when the guide groove 20 is overlapped with the guide groove 20 of the corresponding base portion 3, and forms a cylindrical surface (seal surface 6).

The support surface 22 of the protrusion 21 is not limited to the semi-cylindrical surface described above. In a cross section along the extension direction x, the support surface 22 may not extend linearly, but extend curvilinearly. For example, in a cross section along the extending direction x, the support surface 22 may be a curved line protruding toward the inner side of the guide groove 20. The protruding portion 21 may not have the support surface 22, and the tip of the protruding portion 21 may be linear.

In the illustrated example, two protrusions 21 are provided in the guide groove 20. However, the number of the protruding portions 21 provided on the guide groove 20 is not limited thereto. Only one protrusion 21 may be provided in the guide groove 20, or three or more protrusions 21 may be provided.

The inner surface structure 4 has a plurality of guide grooves 20, and in the illustrated example, the inner surface structure 4 has 10 guide grooves 20. However, the number of guide grooves 20 provided in the inner face structure 4 is not limited thereto. Only one guide groove 20 may be provided in the inner surface structure 4, or three or more guide grooves 20 may be provided. Furthermore, the guide grooves 20 provided in the inner face structure 4 may not all be of the same shape. Specifically, the width of the guide groove 20 may be different. That is, the diameter of the guide hole 5 of the sealing body 1 may be different. For example, as shown in fig. 3 and 4, four guide grooves 20 of 10 guide grooves 20 (the left four guide grooves 20 in fig. 3) form a guide hole 5 having a diameter d1, the groove width is w1, the remaining six guide grooves 20 of 10 guide grooves 20 (the right six guide grooves 20 in fig. 3) form a guide hole 5 having a diameter d2(d2 > d1), and the groove width is w2(w2 > w 1).

As shown in fig. 3 and 4, the contact surface 10 is divided into a plurality of portions by the guide groove 20. Specifically, the contact surface 10 includes: an inter-groove contact surface 11 which extends between a pair of guide grooves 20 adjacent to each other and is a part of the contact surface 10; and end contact surfaces 12, 13 which are respectively expanded at both ends of the contact surface 10 and are a part of the contact surface 10. The inter-groove contact surfaces 11 and the end contact surfaces 12, 13 extend over a surface, for example over a plane.

Furthermore, the inner lateral surface structure 4 has at least two protrusions protruding from the contact surface 10 and has the same number of recesses as the protrusions, which recesses are recessed from the contact surface 10 in such a way that the protrusions can be accommodated, respectively. The protrusions and recesses are arranged in the inner side surface structure 4 so that the protrusions of the base portion 2 can be accommodated in the recesses of the base portion 3, respectively.

Specifically, as shown in fig. 3 to 4, the inner surface structure 4 is provided with two

protrusions

15 and 16 and two

recesses

17 and 18. The protrusion 15 is paired with the recess 17, and the protrusion 15 and the recess 17 are respectively formed so that the recess 17 can precisely receive the protrusion 15. Further, the protrusion 16 is paired with the recess 18, and the protrusion 16 and the recess 18 are formed separately so that the recess 18 can precisely receive the protrusion 16. The

protrusions

15 and 16 protrude from the contact surface 10 in a cylindrical or truncated conical shape, for example, and the

recesses

17 and 18 are recessed from the contact surface 10 in a cylindrical or truncated conical shape, for example. In the

recesses

17 and 18, the

protrusions

15 and 16 are press-fitted, or the

protrusions

15 and 16 are seamlessly accommodated.

The protrusion 15 and the recess 17 are provided on the end contact surface 12 of the contact surface 10, and the protrusion 16 and the recess 18 are provided on the end contact surface 13 of the contact surface 10. The protrusion 15 and the recess 17 are provided to face each other on a line parallel to the extending direction x of the guide groove 20, and the protrusion 16 and the recess 18 are provided to face each other on a line parallel to the extending direction x of the guide groove 20. The

protrusions

15 and 16 are provided on the same side with respect to the

recesses

17 and 18 in the extending direction x.

The

projections

15 and 16 may be the same as or different from each other. When three or more protrusions and recesses are provided, one protrusion and one recess are formed as a pair, as in the case of the

protrusions

15 and 16 and recesses 17 and 18. The projection and the recess are arranged so that a midpoint between the pair of projections and the recess is aligned on a straight line.

In the inner surface structure 4, each guide groove 20, each inter-groove contact surface 11, and each

end contact surface

12, 13 are symmetrical with respect to a middle line l that is a straight line passing through a middle point m1 and a middle point m2, the middle point m1 is a middle point between the protrusion 15 and the recess 17 in a direction parallel to the extending direction x, and the middle point m2 is a middle point between the protrusion 16 and the recess 18 in a direction parallel to the extending direction x. That is, in each guide groove 20, the two protrusions 21 are located at the same position from the middle line l in the extending direction x. In the inner surface structure 4, only two of the protruding portions 21 of each guide groove 20 may be formed symmetrically with respect to the middle line l. In the inner surface structure 4, the guide grooves 20, the inter-groove contact surfaces 11, and the end contact surfaces 12 and 13 may be symmetrical with respect to the middle line l in a region between the protruding portions 21 in the extending direction x (see a region E in fig. 3).

More specifically, the seal face 30 has: a middle sealing surface 31, which is the surface facing away from the inner lateral structure 4; and end seal surfaces 32, 33 extending from a pair of

end edges

31a, 31b of the middle seal surface 31. The pair of

end edges

31a, 31b of the middle seal surface 31 are end edges of the middle seal surface 31 extending along the extending direction x of the guide groove 20. The end sealing surfaces 32, 33 face away from each other in the base part 2 and extend in the extension direction x of the guide groove 20 and connect the end contact surfaces 12, 13 of the inner side structure 4, respectively. The middle seal surface 31 is a surface corresponding to a portion of the communication hole with which the middle seal surface 31 is in contact, and is, for example, flat or substantially flat. The end sealing surface 32 and the end sealing surface 33 have the same shape as each other and are symmetrical with respect to a line extending in the extending direction x of the guide groove 20. The end sealing surface 32 and the end sealing surface 33 may also have different shapes from each other. As shown in fig. 2 and 3, for example, the end sealing surfaces 32 and 33 have

projections

34 and 35 projecting in a direction orthogonal to the extending direction x of the guide groove 20 at both ends, respectively, and the

projections

34 and 35 contact corresponding portions of the communication hole. The protruding portion 34 and the protruding portion 35 have the same shape as each other. The protruding

portions

34 and 35 may have different shapes from each other.

Further, the base body 2 has

open faces

36, 37 facing away from each other in the extending direction x of the guide groove 20. The guide groove 20 is open in the extending direction x on the opening surfaces 36 and 37.

Next, the operation of the seal block 1 having the above-described structure will be described. Fig. 6 to 8 are views showing the seal block 1 in a use state, fig. 6 is a perspective view showing the seal block 1 attached to a wire, fig. 7 is a view showing the seal block 1 attached to the communication hole 53 of the housing 50, and fig. 8 is a cross-sectional view taken along a line a-a of fig. 7. Fig. 6 shows the electric wire 61 passing through the inner surface structure 4 and the guide hole 5 through the base portion 2 of the sealing block 1.

As shown in fig. 1 and 6, the seal block 1 is put into use by the base portion 2 and the base portion 3 being superposed on the inner surface structure 4 side. Specifically, the protrusion 15 of the base body 2 is fitted into the recess 17 of the base body 3, the protrusion 16 of the base body 2 is fitted into the recess 18 of the base body 3, the protrusion 15 of the base body 3 is fitted into the recess 17 of the base body 2, and the protrusion 16 of the base body 3 is fitted into the recess 18 of the base body 2, so that the base body 2 and the base body 3 overlap each other. As described above, the protrusion 15 and the recess 17 are provided to face each other on a line parallel to the extending direction x of the guide groove 20, and similarly, the protrusion 16 and the recess 18 are provided to face each other on a line parallel to the extending direction x of the guide groove 20. Therefore, the base body 2 and the base body 3 can be overlapped as described above. In each of the

base portions

2 and 3, the

protrusions

15 and 16 are located on the same side with respect to the center line l, and the

recesses

17 and 18 are located on the same side with respect to the center line l. Thus, only one of the above-described modes of overlapping the base portion 2 and the base portion 3 is used. Therefore, an undesirable manner of attaching the base portion 2 and the base portion 3 does not occur.

As described above, in the inner surface structure 4, the guide grooves 20, the inter-groove contact surfaces 11, and the end contact surfaces 12 and 13 are symmetrical with respect to the middle line l. Therefore, when the base body 2 and the base body 3 are overlapped, the guide grooves 20 of the base body 2 are accurately overlapped with the guide grooves 20 located at the same position in the inner side surface structure 4 of the base body 3, and the guide holes 5 are formed. The protruding portions 21 of the guide grooves 20 of the base 2 are also precisely overlapped with the protruding portions 21 of the guide grooves 20 located at the same positions in the inner surface structure 4 of the base 3, and an annular protruding portion is formed in the guide hole 5. The leading ends of the annular projecting portions of the guide holes 5 are connected by the support surface 22 of the base 2 and the support surface 22 of the base 3 to form a cylindrical surface (sealing surface 6). In the inner surface structure 4, when only the two protruding portions 21 of each guide groove 20 are symmetrical with respect to the middle line l, and in the inner surface structure 4, when the regions E between the protruding portions 21 of each guide groove 20, each inter-groove contact surface 11, and the end contact surfaces 12 and 13 in the extending direction x are symmetrical with respect to the middle line l, as described above, the protruding portions 21 of the base body 2 and the protruding portions 21 of the base body 3 precisely overlap, an annular protruding portion is formed in the guide hole 5, and the cylindrical sealing surface 6 is formed by the support surface 22.

Further, if the base body 2 and the base body 3 are overlapped, the inter-groove contact surfaces 11 of the contact surface 10 of the base body 2 are in seamless contact with the inter-groove contact surfaces 11 located at the same positions in the inner side surface structure 4 of the base body 3, and the end contact surfaces 12, 13 of the contact surface 10 of the base body 2 are in seamless contact with the end contact surfaces 12, 13 of the base body 3, respectively.

In the use state, as shown in fig. 6, the wires 61 of the lead wires 60 are passed through the guide holes 5 of the seal block 1. In each guide hole 5, the electric wire 61 is supported by the protrusion 21. Specifically, the seal surface 6 is in seamless contact with the electric wire 61 over the entire circumference of the electric wire 61. Further, the sealing surface 6 is pressed by the electric wire 61 by the protrusion of the protrusion 21. As such, in the guide hole 5, the electric wire 61 is held by the protrusion 21, and sealing between the guide hole 5 and the electric wire 61 is achieved in the sealing surface 6. The lead 60 is a wire harness formed by bundling a plurality of wires 61. The electric wire 61 is a wire in which a conductor wire is covered with an insulator.

When two annular protrusions are provided in each guide hole 5 as in the seal block 1 according to the present embodiment, even if one of the annular protrusions is broken, the other annular protrusion can hold the electric wire 61 and can maintain the seal between the electric wire 61 and the guide hole 5. This improves the reliability of the seal block 1.

Further, although the sealing performance can be improved when the sealing surface 6 is a cylindrical surface as described above, when the sealing surface 6 is convex toward the inside, the width of the contact surface between the sealing surface 6 and the electric wire 61 can be reduced, and the resistance when the electric wire 61 is accommodated in the guide groove 20 can be reduced. Thereby, the electric wire 61 can be easily attached to the guide groove 20.

The seal block 1 after the electric wire 61 is passed through the guide hole 5 as described above is attached to the housing 50, and the lead wire 60 is passed through the communication hole 53 of the housing 50 and the conduction between the inside and the outside of the housing 50 is realized, as shown in fig. 7 and 8. The housing 50 includes, for example, a cover 51 and a body 52, and the cover 51 is attachable to the body 52. A groove 54 for forming the communication hole 53 of the housing 50 is formed in the main body 52, and the seal block 1 is mounted in the groove 54. In fig. 7, the cover 51 is shown in a perspective view in an attached state.

As shown in fig. 7 and 8, in the use state, the bottom surface 54a of the groove 54 of the main body 52 is in seamless contact with one of the middle seal surface 31 of the base body 2 or the base body 3 of the seal block 1, and the both side surfaces 54b of the groove 54 are in seamless contact with the end seal surfaces 32 and 33 of the

base bodies

2 and 3 of the seal block 1, respectively. Specifically, the

projections

34, 35 of the end seal surfaces 32, 33 are in seamless contact with the side surface 54b of the groove 54.

Further, a cover 51 is attached to the main body 52 in which the seal block 1 is attached to the groove 54, and a communication hole 53 is formed by an overlapping portion of the groove 54 and the cover 51. As shown in fig. 8, in the case 50 in which the cover 51 is attached to the main body 52, the sealing surface 31 in the other of the base portion 2 or the base portion 3 of the seal block 1 is in seamless contact with a portion of the cover 51 for forming the communication hole 53.

As described above, in the use state, the seal block 1 is in seamless contact with the inner peripheral surface of the communication hole 53 of the housing 50, and the seal surface 6 of each guide hole 5 seals the gap with the electric wire 61 in the guide hole 5, thereby sealing the communication hole 53.

The sealing block 1 may be mounted to the wire 60 as follows: before the

base bodies

2 and 3 are overlapped, the electric wire 61 is accommodated in one of the guide grooves 20 of the

base bodies

2 and 3, and then the base body 2 is overlapped with the base body 3. Therefore, even if the leading end of the lead 60 has a connector, or the leading end of the electric wire 61 has a larger diameter than the guide hole 5, the seal block 1 can be attached to the lead 60.

As described above, the seal block 1 according to the embodiment of the present invention can be used regardless of the form of the lead 60.

While the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, but includes all embodiments included in the concept of the present invention and claims. Further, at least some of the above problems and effects can be achieved by appropriately selecting and combining the respective configurations. In addition, the shape, material, arrangement, size, and the like of each component part in the above embodiments may be appropriately changed according to a specific use mode of the present invention.

For example, the seal block according to the present invention may not have the

protrusions

15 and 16 and the

recesses

17 and 18. At this time, in the use state, the base body 2 and the base body 3 need to be overlapped so that the sealing surface 6 is formed in the guide hole 5 as described above. Further, other technical means that can overlap the base body 2 and the base body 3 may be considered such as the shape of the groove 54 of the main body 52 of the housing 50 so that the sealing surface 6 can be formed in the guide hole 5.

In addition, the number of the protruding portions 21 of the guide groove 20 and the number of the annular protruding portions of the guide hole 5 can be appropriately increased or decreased according to the usage environment, usage conditions, and the like of the seal block 1.

The end sealing surfaces 32 and 33 of the

base portions

2 and 3 may not have the protruding

portions

34 and 35. At this time, the end seal faces 32, 33 of the seal block 1 entirely or partially contact the side surface 54b of the groove 54 without a gap.

Description of the reference symbols

1, sealing the block; 2. 3 a base portion; 4 inner side surface structure; 5, guiding a hole; 6, sealing surface; 10 contact surface; 11 contact surfaces between the grooves; 12. 13 ends of contact surfaces; 15. 16 a protrusion portion; 17. 18 a recess; 20a guide groove; 20a groove surface; 20b, 20c edges; 21 a projection; 22a support surface; 30 sealing surface; 31a mid seal face; 31a, 31b end edges; 32. 33 end sealing surface; 34. 35 a projection; 36. 37 open face; 50 a housing; a 51 cover; 52 a main body; 53 a communication hole; 54 grooves; 54a bottom surface; 54b side surface; 60 conducting wires; 61 electric wires; an E region; l middle line; m1, m2 midpoint; x direction of extension.

Claims

1. A sealing block for sealing a passage through which a wire passes, comprising:

a pair of base portions formed of an elastic body,

the pair of base portions have the same inner side surface structure,

the inner side surface structures are respectively provided with contact surfaces which are expanded on the same surface, and are provided with at least one groove which is a guide groove and is sunken from the contact surfaces and extends along one direction,

the contact surfaces of the pair of inner side surface structures contact each other.

2. The seal block of claim 1,

the guide groove has at least one protrusion,

the protruding portion protrudes in a direction intersecting with an extending direction of the guide groove, and extends around the extending direction.

3. The seal block of claim 2,

the protrusion has a surface at a front end for forming a part of a cylindrical surface extending in the extending direction.

4. The seal block according to any one of claims 1 to 3,

the inner side surface structures are respectively provided with at least two protruding parts protruding from the contact surface and are respectively provided with the same number of concave parts which can accommodate the protruding parts and are sunken from the contact surface as the protruding parts,

the protrusion and the recess are arranged so that the protrusion of one of the pair of base portions can be accommodated in the recess of the other of the pair of base portions, respectively, in the inner side surface structure.

5. The seal block of claim 4,

in the inner side surface structure, the guide groove is symmetrical in the extending direction,

in the inner surface structure, a pair of the one projection and the one recess is formed, and the pair of the projection and the recess are located at symmetrical positions in the extending direction.