JP3126219U - Cable conduit waterproofing equipment - Google Patents

Abstract

A waterproof device itself is prevented from moving and shifting to a drawing-in pipe line side of a basement wall of a customer building or the like due to water pressure generated in a wiring pipe, thereby preventing inundation.
A seal block body 1 is inserted and supported in an insertion hole 2 in a state where the arrangement is sealed with water corresponding to each of the divided blocks of cables, and the seal block body 1 is inserted and arranged in a cable conduit Q. 1 is sandwiched between a clamping bolt 12 and a clamping nut 13 via a split clamping plate 14 arranged before and after 1. Displacement preventing metal fittings 15 are provided that are arranged between the divided tightening plate 14 and the tightening nut 13 and are pressed against the inner wall surface of the cable conduit Q to prevent displacement of the waterproof device P itself. The misalignment prevention metal fitting 15 is provided with locking arc projections 19a and 19b having a stepped arc structure on a part of the peripheral side surface corresponding to a difference in the inner diameter of the cable conduit Q, which is slightly different in size. Become.
[Selection] Figure 1

Description

  The present invention, for example, when building various types of communication and power cables from a cavernous part, a manhole part, etc. into a customer building such as a building, a building structure, etc. The present invention relates to a waterproof device for a cable conduit, which can reliably and easily obtain a waterproof treatment at a drawing-in portion of a drawing-in pipe line of a underground wall.

  Conventionally, when communication cables, etc. are drawn into various building structures from caves, manholes, etc., the caverns, manholes, etc. are often installed in the basement. In order to prevent rainwater and other inundation in Japan, waterproofing and drainage treatment are applied. In particular, various waterproof means have been conventionally employed since it is necessary to ensure a watertight seal at the drawing-in portion so as to prevent water from entering the building structure.

  Among these, as shown in Patent Document 1, for example, in a cable through hole formed in a wall portion of an underground box for underground cable inspection, waterstops attached to the periphery and the center of three cables having a circular cross section. Packing has been proposed. That is, this water-stopping packing is composed of a rubber body in which three disc-shaped rubber materials are stacked, and the center hole of these rubber bodies has an outline line when the three cables are viewed in cross section, The shape is the same as the shape formed by the outline when the three circles having the same diameter as that of one cable are in contact with each other. When three cables are inserted into the center hole, a space is left between the three cables that are the center of the three wheels, for example, to ensure strength against water pressure, etc. In this space portion, a central rubber packing having a different configuration is fitted.

  In addition, as shown in FIG. 8 of Patent Document 1, when a seal block body made of a cylindrical rubber body having a large thickness is used as a water-stopping packing, the seal block body itself is pressed in the cylinder direction by a clamping bolt and a nut. In this manner, the seal block body is expanded in the radial direction thereof, and is in watertight pressure contact with the inner peripheral surface of the cable conduit and the outer peripheral surface of the cables.

  That is, in the water-stopping packing, a cable through hole into which a cable to be inserted is inserted exactly is communicated with the outside through a notch provided in at least one of the cable through holes and is also communicated with each other. A plurality of rubber bodies are molded, and a plurality of rubber bodies are overlapped while shifting their cut positions, and are clamped with screws from both sides of a water-stopping packing body.

  Further, as disclosed in Patent Document 2, as a waterproof device for other cable conduits, a rubber seal block in which a cable insertion hole communicated with the outside is formed by an open cut portion, a communication cut portion, or the like. Body, a cable spacer that is inserted into the cable insertion hole, a center presser plate arranged on both sides of the seal block body, and a divided split outer periphery fastening plate arranged on both sides of the central presser plate, and a cable. There is a technique in which a cable inserted through a cable insertion hole in a state of being inserted into a spacer is put in a water-sealed state by fastening screws from both sides of the divided outer periphery fastening board.

And in this conventionally proposed sealing member, in order to give versatility in consideration of a slight tolerance in the outer diameter of the cable to be inserted, the sealing member which is the cable insertion portion is used. A certain allowance is set for the diameter of the insertion hole, and it is tightly attached to the outer periphery of the cable by expansion along the radial direction of the water blocking packing body by the internal rubber material by the pressing force of the screwing action that tightens after insertion. It is said.
Japanese Utility Model Publication No. 54-168596 Utility model registration No. 2513816

  In such a conventional water-proof packing, it is assumed that the water-proof packing main body by the internal rubber material and the seal block body itself are brought into close contact with the outer circumference of the cable by the pressing force of the screw-fastening action that is tightened after insertion. . However, if the expansion of seal members such as the water-stopping packing main body and the seal block itself due to screwing is insufficient or not uniform, it does not expand and adhere to the outer peripheral surface of the cable, and the intruded water In combination with the capillary phenomenon, watertight sealability cannot be obtained, and therefore, there is a possibility that water in the cable conduit for cable insertion may be flooded into the customer building. Moreover, there is a risk that the waterproof device itself moves to the customer building side and shifts due to, for example, a water pressure that reaches about 3 atm at maximum in the wiring pipe, and the customer building is inundated by this. In addition, there is a problem that the cable outer peripheral surface or the cable itself is adversely affected.

  Therefore, the present invention was devised in view of the existing circumstances as described above. For example, the wiring conduit is supported by supporting a cable inserted and distributed in a wiring conduit connected to a customer building. Waterproofing device for cable conduit that prevents the water inside the customer building from being submerged, and at the same time prevents the waterproof device itself from moving and shifting to the customer building side due to the water pressure generated in the conduit. The purpose is to provide.

In order to solve the above-described problems, in the present invention, the seal block body 1 inserted and supported in the cable conduit Q by being inserted and supported in the insertion hole 2 in a state where the cables C are sealed with water, In a cable conduit waterproofing device P, which is clamped by a clamping bolt 12 and a clamping nut 13 via a divided clamping plate 14 disposed before and after the seal block body 1, a divided clamping plate 14 and a clamping nut 13 are provided. Is provided with a misalignment prevention metal fitting 15 that is pressed against the inner wall surface of the cable conduit Q to prevent the misalignment of the waterproof device P itself.
Further, the misalignment prevention metal fitting 15 can be provided with tip arc-shaped locking projections 19a, 19b having a step structure on a part of the peripheral side surface thereof.
Further, the misalignment prevention metal fitting 15 can be constituted by a locking projection 19c protruding in an oval shape from a part of the peripheral side surface.
In addition, the screw root of the clamping bolt 12 is formed in a rectangular shape so as to prevent the idling of the clamping bolt 12 at the center of the projection 11a projecting from the surface of the divided clamping plate 14. Correspondingly, the fastening fixing hole 11 formed in a square hole, the guide part 16 formed upright around the protrusion 11a so that the circumferential part of the misalignment prevention metal fitting 15 is fitted, and both ends of the guide part 16 The formed locking frame portions 17a and 17b and claw pieces 18 projecting from the back surface of the misalignment prevention metal fitting 15 so as to be locked to the locking frame portions 17a and 17b can be provided.
Further, a circumferential protrusion 20 can be formed on the back surface of the misalignment prevention metal fitting 15.

In the waterproof device for a cable conduit according to the present invention configured as described above, the misalignment prevention metal fitting 15 is rotated by hand or by rotation due to the contact surface pressure of the tightening nut 13. The locking projections 19a and 19b of the misalignment prevention fitting 15 are pressed against the inner peripheral surface of the cable conduit Q by swinging the 15 itself toward the inner side of the cable conduit Q.
Further, the swing range is restricted by allowing the shift prevention metal fitting 15 to swing within a notch range of approximately 90 ° between the locking frame portions 17a and 17b where the guide portion 16 is not formed.
Further, the circumferential protrusion 20 of the shift prevention metal fitting 15 reduces the resistance caused by the surface contact of the shift prevention metal fitting 15 itself that swings within the protrusion 11a formed on the split fastening plate 14, and thereby the cable conduit Q. The pressing operation on the inner surface is made easy.
In addition, the clamping bolts 12 are inserted and inserted into the cable conduit P in a state where the cables C are inserted into the insertion holes 2 and are placed in contact with the front and rear of the seal block body 1. When the seal block body 1 itself is forcibly pressed by the tightening nut 13 or the like, the elastic seal block body 1 itself is expanded along the radial direction.
The expansion along the radial direction of the seal block body 1 itself at this time is performed by pressing the outer peripheral surface of the seal block body 1 to the inner peripheral surface of the cable conduit P and the inner peripheral surface of the insertion hole 2 to the outer peripheral surface of the cables C. In combination with the hardness set in the above, a clearance is not generated between them, and they are pressed in a watertight manner to realize a water seal state.

  According to the present invention, for example, the water in the cable conduit Q is demanded by supporting the cables C inserted and distributed in the cable conduit Q connected and connected to the inlet pipe of the underground wall of a customer building or the like. It is possible to prevent the waterproofing device P itself from moving and shifting to the customer building side due to the water pressure generated in the cable conduit Q, while preventing the water from entering the house building and the like. It is possible to prevent harmful effects on the class C itself.

  That is, according to the present invention, the shift prevention metal fitting 15 is arranged between the divided fastening plate 14 and the fastening nut 13 and is swung to be pressed against the inner wall surface of the cable conduit Q so that the waterproof device P itself. This is because the displacement is prevented, and thus the movement of the waterproof device P itself toward the customer building or the like can be surely prevented.

  Further, since the misalignment prevention metal fitting 15 is provided with the tip arc-shaped locking projections 19a and 19b having a step structure on a part of the peripheral side surface thereof, there is a slight difference in the inner diameter between the inside and the inside of the cable conduit Q. Can also be supported.

  Furthermore, since the misalignment prevention metal fitting 15 is comprised by the latching protrusion 19c which protruded in the ellipse shape from the surrounding side surface part, it can respond also to the type of the inner diameter of the cable conduit | pipe Q a little wider inside diameter.

  Then, the screw root of the clamping bolt 12 is formed in a rectangular rectangular shape so as to prevent idling of the clamping bolt 12 at the center of the projection 11a projecting from the rear surface of the divided clamping plate 14. A fastening hole 11 formed into a square hole, a guide portion 16 formed upright around the projection 11a so that a circumferential portion of the shift prevention metal fitting 15 is fitted, and formed at both ends of the guide portion 16 Since the locking frame portions 17a and 17b and the claw pieces 18 projecting from the bottom surface of the misalignment prevention metal fitting 15 so as to be locked to the locking frame portions 17a and 17b are provided, the guide portion 16 is formed. The rocking range of the misalignment prevention metal fitting 15 is restricted within a notch range of approximately 90 ° between each of the non-holding frame portions 17a and 17b. Therefore, the misalignment prevention metal fitting 15 is pressed against the inner peripheral surface of the cable conduit Q. Or press release Indeed carried out.

  Further, since the circumferential protrusion 20 is formed on the back surface of the displacement prevention metal fitting 15, resistance due to surface contact of the displacement prevention metal fitting 15 itself that swings within the protrusion 11a formed on the divided fastening plate 14 is reduced. Thus, the pressing operation on the inner surface of the cable conduit Q can be easily performed.

  Note that the reference numerals added in the means for solving the above-mentioned problems and the effects of the invention are given for easy reference to the parts showing the respective components described in the drawings. The present invention is not limited to the structure and shape indicated by the reference numeral.

  The best mode for carrying out the present invention will be described below with reference to the drawings. A symbol P shown in the figure is a waterproof device installed in a predetermined cable conduit Q made of, for example, a waterproof cast iron pipe. As shown in FIG. 1, the waterproof device P includes a seal block body 1 having three insertion holes 2 having the same diameter, for example, through which predetermined cables C such as power cables and optical cables for communication are inserted. The front and rear metal split fastening plates 14 are arranged on the front and rear sides of the seal block body 1 so that the seal block body 1 can be clamped by being clamped by the clamping bolts 12 and the fastening nuts 13. It is generally constituted by a misalignment prevention metal fitting 15 that is pressed against the inner wall surface of the cable conduit Q to prevent the misalignment of the waterproof device P itself.

  The seal block body 1 is formed in a cylindrical shape having an appropriate thickness (height) before and after along the tube direction of the cable conduit Q, and the peripheral surface is formed in an uneven wave shape for slip prevention, The seal block body 1 itself is divided into, for example, three parts before and after the insertion direction, and the rubber hardness of the center part of the seal block body located at the center is set to the rubber hardness of the front and back parts of the seal block body located at the front and back. Are configured differently. That is, the rubber hardness of the center part of the seal block body located at the center is formed with a hardness of 30 degrees, and the rubber hardnesses of the front and back parts of the seal block body located on both front and rear sides of the seal block body center part are sandwiched. It is formed to a hardness of 60 degrees. For example, when the compression force from the front-rear direction, that is, the compression force along the tube direction of the cable conduit Q, is applied to the seal block body 1 itself, for example, the entire length of the seal block body 1 is not reduced. At the same time, the seal block body 1 is compressed so as to reduce the height, and at the same time, the expansion and expansion of the seal block body 1 itself is allowed in the radial direction of the seal block body 1 itself, which is a direction substantially orthogonal to the direction of the compression force. Needless to say, the hardness of the seal block body 1 is not limited to the above example.

  Further, as shown in the figure, the seal block body 1 itself is divided into, for example, three blocks having a substantially fan shape when viewed from the front, corresponding to the number of cables C to be inserted and supported along the circumferential direction. . A semicircular recess 4 through which the cables C are inserted is formed in a recess shape on the adjacent surface 3 along the radial direction in which the three blocks abut against other adjacent blocks. An insertion hole 2 is formed through which the cables C are inserted when the abuts.

  On both front and rear side surfaces of the seal block body 1 which is the opening end of the insertion hole 2, a cylindrical outer jacket portion 5 is provided so as to closely adhere to the outer periphery of the cables C inserted into the insertion hole 2. The mantle 5 is intended to improve the adhesion to the front and rear divided fastening plates 14. The thickness of the cylindrical wall of the outer jacket portion 5 itself is such that it is tightly attached to the outer peripheral surface of the cables C during compression tightening by the split fastening plate 14, and the length along the insertion direction in the insertion hole 2 is split fastening. It is assumed that it substantially corresponds to the thickness of the attached plate 14 itself.

  The insertion hole 2 itself is opened as one in the seal block body 1, is opened as four in the seal block body 1, and is further formed as five or more. It is possible to do. Further, the seal block body 1 itself is not a plurality of independent divided blocks, but a series of blocks each formed with a recess 4 through which the cables C can be inserted are made to be expandable as a whole. It can also be configured.

  Further, each of the divided blocks of the seal block body 1 has a round hole-shaped bolt insertion hole 6 through which a square root structure clamping bolt 12 for compressing and reducing the seal block body 1 itself is inserted. Is drilled in parallel. The seal block body 1 itself is compressed and clamped by the split clamping plate 14 disposed in contact with the front and rear of the seal block body 1. This divided fastening plate 14 itself is arranged and fixed corresponding to each of the divided blocks of the seal block body 1, and has a circular shape which is substantially the same diameter as the seal block body 1 and is the front shape of the seal block body 1. By dividing the block into three corresponding to the three fan-shaped blocks that are in contact with each other via the adjacent surfaces 3, the fan-shaped block basically has a substantially fan shape as viewed from the front.

  Further, as shown in FIG. 5, the divided fastening plate 14 has a seal block corresponding to the position of the bolt insertion hole 6 in the seal block body 1 together with the divided fastening plate 14 itself from the outside of the divided fastening plate 14. A tightening fixing hole 11 through which a pressure bolt 12 for compressing and tightening the body 1 is inserted. The tightening fixing hole 11 itself is formed at the center of a substantially circular projection 11a projecting on the surface of the divided tightening plate 14 so as to prevent the idling of the pressure tightening bolt 12. Twelve screw roots are formed in the square holes corresponding to the rectangular corners. Further, around the protrusion 11a, a guide portion 16 having a standing wall shape is formed over approximately 270 ° so that a circumferential portion of a later-described shift preventing metal fitting 15 is fitted, and both ends of the guide portion 16 are opposed to each other. By forming locking frame portions 17a and 17b protruding in a substantially L-shaped frame shape, a claw piece 18 (to be described later) of the shift prevention metal fitting 15 is locked.

  As shown in FIG. 4, the misalignment prevention metal fitting 15 is formed in a washer shape having a round hole at the center so that the tip end portion of the clamping bolt 12 is inserted, and a part of the peripheral side surface is formed on the inner surface of the cable conduit Q. For example, tip arc-shaped locking projections 19a and 19b having a two-step structure are formed to cope with a certain difference in inner diameter. For example, of the locking projections 19a and 19b, the lower inner locking projection 19a corresponds to the inner diameter of the PVC pipe (SVP) 100 mm, and the higher outer locking projection 19b corresponds to the inner diameter 105 of the galvanized steel pipe. .3mm can be supported.

  Further, a substantially rectangular projection-shaped claw piece 18 for hanging to the locking frame portions 17a and 17b at both ends of the guide portion 16 is suspended from the center of the back surface of the locking projections 19a and 19b. The swing range is restricted by allowing the shift prevention metal fitting 15 to swing within a notch range of approximately 90 ° in the middle between the locking frame portions 17a and 17b in which the portion 16 is not formed. . Further, a donut-shaped circumferential protrusion 20 is formed around the round hole on the back surface of the anti-displacement metal fitting 15, so that the inside of the protrusion 11 a formed on the divided fastening plate 14 is formed. The resistance due to the surface contact of the anti-slip fitting 15 itself that swings is reduced so that it can be easily swung, thereby making it easy to press the inner surface of the cable conduit Q. The pressing operation of the shift preventing metal fitting 15 on the inner surface of the cable conduit Q is performed by hand, but can also be swung by rotation due to the contact surface pressure of the tightening nut 13.

  As shown in FIGS. 6 to 8, another configuration of the misalignment prevention metal fitting 15 includes a locking projection 19c protruding in an oval shape from a part of the peripheral side surface so as to correspond to the inner diameter 130 mm of the inner side surface of the cable conduit Q. It may be configured.

  The clamping bolt 12 is formed longer than the total thickness of each of the seal block body 1 and the divided fastening plate 14 disposed in contact with the front and rear side surfaces of the seal block body 1, and its head is outside the divided fastening plate 14. It is round-headed so that it does not travel greatly. The tip of the screw bolt 12 protrudes from either the front side or the rear side of the divided fastening plate 14, and the tightening nut 13 is screwed into the protruding portion via the misalignment prevention fitting 15. The tightening nut 13 itself is formed in a so-called long nut shape in consideration of the ease of tightening work. Accordingly, the tightening of the tightening nut 13 allows the seal block body 1 itself to expand and expand in the radial direction, thereby pressing the inner surface of the cable conduit Q in a pressing manner. At the same time, the displacement preventing metal fitting 15 can be swung to the inner side of the cable conduit Q by the rotation due to the contact surface pressure of the tightening nut 13 and pressed against this.

  Next, an example of assembly, use, and operation of the best mode configured as described above will be described. The cables C inserted into or to be inserted into the cable conduit Q are entangled in a gentle spiral shape. When the waterproof device P is attached, the cables C are separated from each other after being disassembled into the respective cables C. Each of the blocks of the seal block body 1 is mounted from the outside in the recess 4, and the adjacent surfaces 3 of the block are brought into contact with each other to insert and position the cables C in the insertion holes 2 at predetermined positions (FIG. 1). reference).

  Next, the square bolted clamping bolts 12 are inserted from the side of the divided fastening plate 14 in contact with and closely contacted to the side of the seal block body 1 on the side to be inserted into the cable conduit Q, and the customer building side seal on the opposite side is inserted. The tip of the clamping bolt 12 is moved out from the fastening fixing hole 11 of the divided fastening plate 14 which is in contact with and closely contacted with the side surface of the block body 1, and the fastening nut 13 is temporarily screwed through the misalignment prevention fitting 15. In this way, the seal block body 1 or the like is inserted into the cable conduit Q together with the cables C or by sliding on the cables C, and the whole is pushed in until the predetermined water stop position is reached.

  Thereafter, the displacement prevention bracket 15 is rotated by hand, or the displacement prevention bracket 15 is swung toward the inner side of the cable conduit Q by rotation due to the contact surface pressure of the tightening nut 13. The stop protrusions 19a and 19b are strongly pressed against the inner peripheral surface of the cable conduit Q (see FIGS. 2 and 3). Then, the tightening nut 13 is screwed in again, and the seal block body 1 itself is squeezed from both the front and rear sides to be in an expanded state and fixed in a tensioned manner in the cable conduit Q.

  At this time, the strong screw-in to the clamping bolt 12 by the tightening nut 13 reduces the entire seal block body 1 along the cylindrical direction, and the seal block body 1 itself expands in the radial direction. Then, the cable conduit Q is in watertight contact with the inner peripheral surface of the cable conduit Q and the outer peripheral surface of the cables C. Moreover, since the rubber hardness of the central portion of the seal block body is different from the rubber hardness of the front and rear portions of the seal block body on both the front and rear sides, the support by pressing after the waterproof device P is inserted into the cable conduit Q is supported. The inner peripheral wall of the cable conduit Q and the seal block body 1 in the central portion are pressed and supported in a completely watertight state without generating a gap.

  Each of the seal block bodies 1 is different from the difference in rubber hardness between the cable pipe Q inner peripheral wall and the cable pipe Q when the seal block body 1 is supported by tightening the tightening nut 13 on the pressure bolt 12 after the seal block body 1 is inserted into the cable conduit Q. The seal block body 1 is brought into a completely watertight state without causing a gap, and is pressed and supported.

1 is an exploded perspective view of a waterproof device in the best mode for carrying out the present invention. It is a front view which shows the state which similarly attached the waterproof device in the cable conduit. It is a partially notched side view which similarly shows the state which attached the waterproofing device in the cable conduit. Similarly, it shows an example of a misalignment prevention metal fitting, (a) is a front view, (b) is a side view. The example of a division | segmentation fastening plate is similarly shown, (a) is a front view, (b) is a side view. It is a front view which shows the state which attached the waterproof device using the division | segmentation fastening board by another example in the cable conduit | pipe. It is a partially notched side view which shows the state which attached the waterproof device using the division | segmentation fastening plate by another example in the cable conduit | pipe. Similarly, it shows a misalignment prevention metal fitting according to another example, (a) is a front view, (b) is a side view.

Explanation of symbols

P ... Waterproof device Q ... Cable conduit C ... Cables 1 ... Seal block body 2 ... Insertion hole 3 ... Adjacent surface 4 ... Recess 5 ... Outer part 6 ... Bolt insertion hole 11 ... Fastening fixing hole 11a ... Projection 12 ... Clamping bolt 13 ... Clamping nut 14 ... Divided clamping plate 15 ... Displacement prevention bracket 16 ... Guide part 17a, 17b ... Locking frame part 18 ... Claw piece 19a, 19b, 19c ... Locking protrusion 20 ... Circumferential protrusion Part

Claims (5)

  The sealing block inserted and supported in the cable conduit through the insertion hole in a state where the cables are sealed with water, and a clamping bolt through a split fastening plate arranged before and after the sealing block body, In a cable conduit waterproofing device that is clamped by a tightening nut, it is arranged between the split tightening plate and the tightening nut and is swung to be pressed against the inner wall surface of the cable conduit so that the waterproof device itself is displaced. A cable conduit waterproofing device comprising a metal fitting for preventing misalignment.   The waterproof device for a cable conduit according to claim 1, wherein the misalignment prevention metal fitting is provided with a tip arc-shaped locking projection having a step structure on a part of a peripheral side surface thereof.   2. The waterproof device for a cable conduit according to claim 1, wherein the shift prevention metal fitting is constituted by a locking protrusion protruding in an oval shape from a part of the peripheral side surface.   Formed in a square hole corresponding to the fact that the screw root of the clamping bolt is formed in a rectangular square shape at the center of the projection projecting on the surface of the divided clamping plate to prevent idling of the clamping bolt A tightening fixing hole, a guide portion standing upright around the protrusion so that a circumferential portion of the misalignment prevention fitting fits in, a locking frame portion formed at both ends of the guide portion, and the locking The waterproof device for a cable conduit according to any one of claims 1 to 3, further comprising a claw piece projecting from the back surface of the misalignment prevention metal fitting so as to be locked to the frame portion. The waterproof device for a cable conduit according to any one of claims 1 to 4, wherein a circumferential protrusion is formed on the rear surface of the misalignment prevention fitting.

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