JP2015164372A - Duct opening waterproof device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a duct opening waterproof device which forms a seal portion and also achieves good followability to a cable.SOLUTION: The invention relates to a duct opening waterproof device 100 which seals a duct opening in a state where a cable 40 is laid on a duct. The duct opening waterproof device 100 includes: a first seal member 10 which contacts with a wall surface of the duct and the cable; a second seal member 20 which is disposed at the radial inner side relative to the first seal member and contacts with the cable; and a fastening part 30 which fastens the first seal member and the second seal member from both ends of the first seal member and the second seal member in an axial direction of the duct. The second seal member includes: wire attachment members 21, 22 disposed at both axial ends of the duct; and a flexible wire 23 which is connected with the wire attachment members and inhibits deformation of the second seal member which attempts to extend in an axial direction when the cable applies a radial force to the second seal member.

Description

  The present invention relates to a conduit port waterproof device.

  Cables used for supplying electric power and the like are often laid underground together with pipelines. Therefore, a waterproof device is provided to prevent underground water from entering the cable laid underground. A conventionally used waterproofing device is a technique in which a seal member such as rubber is divided and arranged in a space between a pipe and a cable at a certain position in the axial direction of the pipe, and tightened with a bolt and a nut from the axial direction. (See Patent Document 1).

Japanese Patent Laid-Open No. 9-51621

  However, the cable laid in the ground is in a state where the kinked state is along the pipe line, and there is a problem that the cable is damaged when the pressure is excessively applied by the sealing rubber as described above, which is not preferable. .

  Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a conduit port waterproof device that not only forms a seal portion but also has good followability to a cable.

  The present invention that achieves the above object is a conduit port waterproof device that seals a conduit port in a state where a cable is laid in the conduit, and includes a first seal member that contacts the wall surface of the conduit and the cable, A second seal member disposed radially inward of the seal member and in contact with the cable; and the first seal member and the second seal member from both ends of the first seal member and the second seal member in the axial direction of the pipe line And a tightening portion for tightening. In the present invention, the second seal member is connected to the seal flange member disposed at both axial ends of the pipe line and the seal flange member, and when the cable applies a radial force to the second seal member. The second seal member has a flexible core member having a core that suppresses deformation that tends to extend in the axial direction.

  According to the present invention having the above-described configuration, the seal flange member having the second seal member disposed at both axial ends, and the cable is connected to the seal flange member, and the cable applies a radial force to the second seal member. In this case, the second seal member is configured to have a flexible core member having a core that suppresses deformation that tends to extend in the axial direction. Therefore, when a radial force is applied by the cable, the second seal member is prevented from deforming to extend in the axial direction, so that a seal portion can be formed. Moreover, since the core-shaped member is configured as a flexible core and does not restrain the entire second seal member, the core-shaped member can be flexibly deformed while exhibiting the sealing performance against the external force due to the cable. It is possible to prevent the cable from being damaged by the seal member.

FIG. 1A is a perspective view showing a conduit port waterproof device according to an embodiment of the present invention, and FIG. 1B is a plan view showing the device. FIG. 2A is a front view showing the waterproof device, and FIG. 2B is a rear view. It is sectional drawing which follows the 3-3 line of FIG. FIG. 4A to FIG. 4E are a perspective view, a plan view, a side view, a front view, and a bottom view showing a concave seal member constituting the waterproof device. FIG. 5A to FIG. 5E are a perspective view, a plan view, a side view, a front view, and a bottom view showing a convex seal member constituting the waterproof device. 6A and 6B are a perspective view and a front view showing a second seal member constituting the waterproof device, and FIG. 6C is a sectional view taken along line 6C-6C in FIG. 6B. It is. FIGS. 7A to 7E are a perspective view, a plan view, a side view, a front view, and a bottom view showing a first flange constituting the waterproof device. FIGS. 8A to 8E are a perspective view, a plan view, a side view, a front view, and a bottom view showing a second flange constituting the waterproof device. FIG. 9A and FIG. 9B are a perspective view and a front view showing a bolt constituting the waterproof device. FIG. 10A to FIG. 10C are a perspective view, a side view, and a front view showing a bolt receiving member constituting the waterproof device. It is a perspective view which shows the nut which comprises the waterproof device.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the following description does not limit the technical scope and terms used in the claims. In addition, the dimensional ratios in the drawings are exaggerated for convenience of explanation, and may differ from actual ratios.

  1A and 1B are a perspective view, a plan view, and FIGS. 2A and 2B are front views showing the waterproof device, respectively, according to an embodiment of the present invention. FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. 4 (A) to 4 (E) are a perspective view, a plan view, a side view, a front view, and a bottom view, and FIGS. 5 (A) to 5 (E), showing a concave seal member constituting the waterproof device. It is a perspective view, a top view, a side view, a front view, and a bottom view showing a convex seal member constituting the waterproof device. 6A and 6B are a perspective view and a front view showing a second seal member constituting the waterproof device, and FIG. 6C is a sectional view taken along line 6C-6C in FIG. 6B. 7 (A) to 7 (E) are a perspective view, a plan view, a side view, a front view, and a bottom view showing the first flange constituting the waterproof device, and FIGS. 8 (A) to 8 (E). ) Is a perspective view, a plan view, a side view, a front view, and a bottom view showing a second flange constituting the waterproof device. 9 (A) and 9 (B) are a perspective view and a front view showing a bolt constituting the waterproof device, and FIGS. 10 (A) to 10 (C) show a bolt receiving member constituting the waterproof device. A perspective view, a side view, and a front view, FIG. 11 is a perspective view showing a nut constituting the waterproof device.

  The conduit port waterproof device 100 according to the present invention includes a first seal member 10, a second seal member 20, a fastening part 30, a cable 40, and a pipe 50. The conduit port waterproof device 100 is installed at the entrance of a conduit, and the cable 40 is used as a power cable or the like. Note that the pipe 50 is illustrated with an extremely short axial length for convenience of illustration.

  The first seal member 10 includes a concave seal member 11 and a convex seal member 12. The first seal member 10 is disposed inside the tube 50 and prevents water from entering between the tube 50 and the cable 40 together with the second seal member 20. In the present embodiment, three cables 40 for supplying power and the like are arranged inside the tube 50, but the number is not limited to this.

  The first seal member 10 is disposed radially outward from the second seal member 20, and the second seal member 20 is disposed near the center. The concave seal members 11 and the convex seal members 12 constituting the first seal member 10 are alternately arranged in the axial direction of the tube 50.

  The concave seal member 11 includes a pipe line contact portion 11a, cable contact portions 11b and 11c, seal contact portions 11d, 11e, and 11f, a bolt insertion portion 11g, and concave portions 11h and 11j.

  The first seal member 10 is formed in a substantially fan shape, and in the present embodiment, the first seal member 10 is divided into three at intervals of about 120 degrees in the circumferential direction, but the size of the central angle and the number of divisions are not limited thereto. The pipe contact portion 11 a hits the outer peripheral portion of the substantially fan-shaped first seal member 10 and hits a portion that contacts the pipe 50. The first seal member 10 is in contact with the cable 40 for waterproofing, and the cable contact portions 11 b and 11 c are in contact with the cable 40. The seal contact portions 11d, 11e, and 11f are contact portions with the second seal member 20 or the adjacent first seal member 10, the seal contact portion 11d is in contact with the second seal member 20, and the seal contact portions 11e and 11f are In contact with the adjacent first seal member 10.

  The bolt insertion portion 11g is a portion that is formed inward of the concave seal member 11 and through which a bolt that generates an axial force is inserted into the first seal member 10 including the concave seal member 11 and the convex seal member 12. The concave portions 11h and 11j are formed on both end surfaces of the concave seal member 11 in the axial direction. The convex seal member 12 has convex portions 12h and 12j as shown in FIGS. 3 and 5C, while the concave portions 11h and 11j accommodate the convex portions 12g and 12h of the convex seal member 12. And formed to contact and form a seal site. The concave portions 11g and 11h are formed in a tapered shape in consideration of ease of insertion of the convex portions 12g and 12h.

  The convex seal member 12 includes a pipe line contact portion 12a, cable contact portions 12b and 12c, seal contact portions 12d, 12e, and 12f, a bolt insertion portion 12g, and convex portions 12h and 12j. Since the conduit contact portion 12a, the cable contact portions 12b and 12c, the seal contact portions 12d, 12e and 12f, and the bolt insertion portion 12g are the same as the configuration of the concave seal member 11, the description thereof is omitted.

  The convex portions 12 g and 12 h are formed on the end surface in the axial direction of the convex seal member 12, and contact the concave portions 11 h and 11 j of the concave seal member 11. Moreover, the convex parts 12h and 12j are formed in the taper shape similarly to the concave parts 11h and 11j.

  The concave seal member 11 and the convex seal member 12 are made of, for example, natural rubber, synthetic rubber, soft plastic, or thermoplastic elastomer, but are not limited thereto.

  The second seal member 20 includes wire attachment members 21 and 22 (corresponding to a seal flange member), a wire 23 (corresponding to a core member), and an elastic member 24. The wire attachment members 21 and 22 are disposed at both axial ends of the second seal member 20. Although the wire attachment members 21 and 22 are formed in a plate shape, the shape is not limited to this. The wire 23 is joined to the wire attachment members 21 and 22 at the center of the wire attachment members 21 and 22 so that the wire 23 can be flexibly deformed with respect to an external force from the cable 40. The elastic member 24 is made of the same material as the concave seal member 11 and the convex seal member 12, but the material is softer and more flexible than the concave seal member 11 and the convex seal member 12 together with the wire 23. Therefore, even if the second seal member 20 is deformed into a state where the cable 40 is inserted and does not extend straight in the axial direction, the second seal member 20 can be deformed flexibly along the shape of the cable 40. The concave seal member 11 and the convex seal member 12 are configured to have the same hardness. The first seal member 10 is hardened by A60 (JIS K6253), and the second seal member 20 is hardened by A30. There is, but is not limited to this.

  The tightening portion 30 includes a first flange 31, a second flange 32 (corresponding to a tightening flange member), a bolt 33, a bolt receiving member 34, and a nut 35.

  The first flange 31 and the second flange 32 are disposed at both ends of the first seal member 10, and compress the first seal member 10 in the axial direction by the fastening portion 30. The 1st flange 31 has the recessed part 31a, the bolt insertion hole 31b, and the hook parts 31c and 31d. The first flange 31 is formed slightly smaller than the concave seal member 11 when viewed from the front, and is accommodated in the concave portion 11 h or the concave portion 11 j of the concave seal member 11. The recess 31a is a part where the bolt receiving member 34 is disposed, and the contact surface with the bolt 33 or the bolt receiving member 34 is formed in a hemispherical shape.

  The bolt insertion hole 31b is formed continuously from the recess 31a and is formed to allow the bolt 33 to pass therethrough. The hook portions 31 c and 31 d are formed to compress the first seal member 10 from the opposite side of the bolt head in the axial direction when generating an axial force by the bolt 33. In the present embodiment, the hook portions 31c and 31d are configured in a substantially fan shape, but the number of the hook portions is not limited to the above, and the shape may not be a fan shape, and may be a polygon or the like. Good.

  The second flange 32 has a recess 32a and a bolt insertion hole 32b. Since the bolt insertion hole 32b is the same as the bolt insertion hole 31b of the first flange 31, the description thereof is omitted. Similar to the first flange 31, the recess 32a is not only formed by cutting the contact surface with the bolt 33 into a hemispherical surface, but is further formed with two cutouts 32c and 32d in the circumferential direction therefrom. Yes. The notches 32c and 32d accommodate rotation stoppers 33c and 33d of a bolt 33 described later, thereby functioning as rotation stoppers when the nut 35 is tightened.

  The bolt 33 includes a bolt head 33a, a male screw 33b, and rotation stoppers 33c and 33d. The bolt head 33a is large enough to be accommodated in the recess 32a of the second flange 32, and the contact surface with the flanges 31 and 32 is formed into a hemispherical surface. The detents 33c and 33d are formed in the vicinity of the bolt head 33a and function as detents when tightened with the nut 35 as described above. However, the notches 32c and 32d of the second flange 32 are formed with a margin relative to the rotation stoppers 33c and 33d, in other words, with a certain gap. Therefore, even when the cable 40 applies a certain amount of external force to the first seal member 10 when the bolt 33 is inserted into the bolt insertion portions 11g and 12g of the first seal member 10, the bolt 33 is a spherical bolt head 33a. Even if it is not necessarily parallel to the axial direction along the spherical surface of the concave portion 32a of the second flange 32, the bolt can be advanced toward the nut side, and assembling workability can be improved.

  The bolt receiving member 34 has a flange contact portion 34a and a bolt insertion hole 34b. Like the bolt head 33a of the bolt 33, the flange contact portion 34a has a hemispherical contact surface with the flanges 31 and 32.

  The first flange 31, the second flange 32, the bolt 33, the bolt receiving member 34, and the nut 35 are made of a metal such as SS material (general structural rolled steel), and the surface is plated. However, the aspect of the material and the surface treatment is not limited to this.

  Next, a method for assembling the conduit port waterproof device according to the present embodiment will be described. First, with the cable 40 projecting from the tip of the tube 50, the notches 32c and 32d of the three second flanges 32 are inserted in a state where the positions of the detents 33c and 33d of the bolts 33 are aligned. Then, as shown in FIG. 3, the concave seal member 11, the convex seal member 12, the concave seal member 11, the convex seal member 12, and the concave seal member 11 are passed through the bolt 33. Then, the second flange 32, the concave portion 11h of the concave seal member 11, the concave portion 11j of the concave seal member 11 and the convex portion 12h of the convex seal member 12 adjacent to each other are fitted together. Then, the first flange 31 is fitted into the concave portion 11 h of the concave seal member 11, the bolt receiving member 34 is disposed in the concave portion 31 a of the first flange 31, and the nut 35 and the bolt 33 are temporarily tightened. Finally, the nut 35 and the bolt 33 are finally tightened, and the pipe port waterproof device 100 is pushed into the axial direction of the pipe 50 until the hooks 31c and 31d of the first flange 31 meet the end of the pipe 50, and the installation work is performed. Is completed.

  Next, the effect of the conduit port waterproof device according to the present embodiment will be described. A pipe port waterproof device that waterproofs the inside of a pipe that accommodates a power cable places an elastic member such as rubber between the pipe and the cable to perform sealing. However, when the elastic member is disposed between the pipe and the cable, the conventional waterproofing device for the conduit port applies pressure to the cable, and if this force is strong, the covering in the outer layer of the cable is damaged, and the electric resistance This is not preferable because it causes a cause of increase.

  In contrast, the conduit port waterproof device 100 according to the present embodiment is inside the pipe 50 and applies pressure to the cable 40 by the first seal member 10 from the outside and the second seal member 20 from the inside. The second seal member is formed when the second seal member 20 is connected to the wire attachment members 21 and 22 and the wire attachment members 21 and 22 and the cable 40 applies a force in the radial direction. The wire 20 is configured to have a wire 23 that suppresses deformation that tends to extend in the axial direction. For this reason, the second seal member 20 can be deformed in accordance with the shape of the cable while securing the sealing performance by the wire 23, so that it is possible to prevent the cable from being damaged by flexibly following the cable.

  Further, the generation of the axial force for projecting the first seal member 10 in the radial direction to form the seal portion includes the first flange 31, the second flange 32, the bolt 33, the bolt receiving member 34, and The bolt head 33a of the bolt 33 and the flange contact portion 34a of the bolt receiving member 34 are formed in a spherical shape and are in contact with the flanges 31 and 32. Therefore, even if the bolt 33 and the bolt receiving member 34 are inserted in a state inclined at a slight angle with respect to the axial direction, the assembly can be performed. Moreover, the force exerted on the cable 40 through the flanges 31 and 32 and the first seal member 10 can be reduced, and the stress applied to the cable 40 can be reduced.

  Further, the first seal member 10 is divided in the axial direction, and has a convex seal member 12 having convex portions 12h and 12j at both end portions in the axial direction, and concave portions 11h and 11j at both end portions in the axial direction. The concave seal members 11 that are in contact with the projections 12h and 12j and expand in the radial direction to form seal portions are arranged alternately. As described above, the sealing member is divided and arranged in the axial direction, so that the mounting operation can be facilitated as compared with the case where the sealing member is inserted into the bolt 33 as one component.

  In addition, this invention is not limited only to embodiment mentioned above, A various change is possible within a claim.

  Although the 1st seal member 10 was constituted by the concave seal member and the convex seal member, it is not limited to this, it is not divided in the axial direction, and is constituted as one component (may be divided in the circumferential direction). Are also within the scope of the present invention. Moreover, although the recessed parts 11h and 11j of the concave seal member 11 and the convex parts 12h and 12j of the convex seal member 12 have been described as being configured in a tapered shape, the present invention is not limited to this and is configured in a shape without a taper. It may be. In addition, the concave seal member 11 has the concave portions 11h and 11j, and the convex seal member has the convex portions 12h and 12j. However, the present invention is not limited to this. It may be divided in the direction. Further, there is a sealing property between the first seal members adjacent in the circumferential direction, between the first seal member and the conduit, between the first seal member and the cable, or between the cable and the second seal member. You may make it apply | coat further the sealing agent which consists of resin etc. which improve this.

10 1st sealing member,
11 concave seal member,
12 Convex seal member,
11a, 12a Pipe line contact portion,
11b, 11c, 12b, 12c cable contact part,
11d, 12d Seal contact portion (with second seal member),
11e, 11f, 12e, 12f (with an adjacent first seal member) a seal contact portion,
11g, 11h recess,
12g, 12h convex part,
100 conduit opening waterproofing device,
20 second seal member,
21, 22 Wire attachment member (seal flange member),
23 wire (core member),
24 elastic member,
30 Tightening part,
31 1st flange (clamping flange member),
32 Second flange (clamping flange member),
33 volts,
34 bolt receiving member,
35 nuts,
40 cables,
50 tubes.

Claims (4)

A pipe opening waterproof device that seals a pipe opening with a cable laid in the pipe,
A first seal member that contacts the wall surface of the conduit and the cable;
A second seal member disposed radially inward of the first seal member and in contact with the cable;
A tightening portion that tightens the first seal member and the second seal member from both ends of the first seal member and the second seal member in the axial direction of the pipe line;
The second seal member is connected to the seal flange member disposed at both axial ends of the pipe line, and the seal flange member, and the cable applies a radial force to the second seal member. A conduit opening waterproofing device comprising a flexible core member having a core that suppresses deformation of the second seal member extending in the axial direction.   The conduit port waterproof device according to claim 1, wherein the core member is a wire. The tightening portion is disposed at both axial ends of the pipeline, and a tightening flange member for tightening the first seal member from both ends,
A bolt and a bolt receiving member for applying a tightening force to the tightening flange member;
The head portion of the bolt and the bolt receiving member are at least one embedded in the clamping flange member, and a portion that is embedded in the clamping flange member and contacts the clamping flange member is formed in a spherical surface. The conduit port waterproofing device according to 1. The first seal member is divided in an axial direction;
A convex seal member having a convex portion at least at one end in the axial direction;
A concave seal member that has a concave portion at least in one end in the axial direction, and that forms a seal part by contacting the convex portion and expanding in the radial direction;
The conduit port waterproof device according to any one of claims 1 to 3, wherein the concave seal member and the convex seal member are alternately arranged in the axial direction.