JP4532595B1 - Piping structure, piping branch cover and cable laying method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe for a cable protection pipe branching portion that can easily branch a cable accommodated in a protection pipe as needed, has no invasion of water or the like from the branching section into the protection pipe, and has excellent workability and appearance. Provide structure etc.
In a pipe branching structure, a main pipe and a branch pipe are connected by a cover. The cable 9 in the main pipe 3 is taken out from a cable opening 11 provided in the main pipe 3 and is inserted into the branch pipe 5. The main pipe 3 and the branch pipe 5 are held by the cover 7, the main pipe 3 is held by the main pipe holding part 15 of the cover 7, and the branch pipe 5 is held by the branch pipe holding part 13. A branch pipe holding projection 14 is provided on the inner surface near the tip of the branch pipe holding portion 13. The corrugation on the outer periphery of the branch pipe 5 inserted into the branch pipe holding portion 15 is locked and fixed by the branch pipe holding protrusion 14. The cover 7 is provided so as to cover the entire cable opening 11.
[Selection] Figure 1

Description

  The present invention relates to a piping structure such as a protective tube through which a cable or the like is internally passed, a piping branch cover provided in a piping branch portion, and a cable laying method.

  Conventionally, as a protective tube for a cable such as an electric wire, a flexible resinous corrugated tube, a steel tube, or the like is used. However, when a conventional protective tube is used, it is necessary to use a relay box or the like installed at each cable extraction position and capable of extracting the internal cable at a portion where the internal cable is extracted to the outside of the protective tube. However, using a relay box requires construction man-hours and costs. On the other hand, there is a method of providing a hole in a part of the protective tube and taking out the cable inside.

  As a protective tube that can accommodate or take out a cable such as an electric wire, for example, a slit portion that is continuously cut from one side in the longitudinal direction to the other end is provided on one side in the radial direction. There is a protective tube in which a notch hole is continuously provided from one side in the longitudinal direction to the other end (Patent Document 1).

JP 2002-165327 A

  However, when used in a protective tube such as that disclosed in Patent Document 1, it is necessary to prevent water from entering from the cutting portion, and the protective tube may be crushed by an external force or the cutting portion may be opened. .

  The present invention has been made in view of such problems, and can easily branch the cable accommodated in the protective tube as necessary, and there is no entry of water or the like from the branch portion into the protective tube. An object of the present invention is to provide a piping structure for a cable protection pipe branching portion that is excellent in workability and appearance (appearance).

In order to achieve the above-described object, the first invention is a resin cover attached to a main pipe through which a cable is passed, and is provided in the main pipe and a main pipe holding portion for holding the main pipe. A branch pipe holding part for holding a branch pipe through which the cable taken out from the opening is passed, and (A) the partition between the main pipe holding part and the branch pipe holding part via a partition space (B) the tip of the main pipe holding part is open, the holding space of the main pipe holding part is smaller than the cross section of the main pipe, and the main pipe is attached to the main pipe holding part In the state, the main pipe holding part can be opened by elastic deformation so as to sandwich the main pipe, and (C) the holding space of the branch pipe holding part is smaller than the cross section of the branch pipe, and the branch pipe is connected to the branch. In the state inserted in the tube holding part, The branch pipe holding part can be opened by elastic deformation so as to sandwich the pipe, and (D) a cable passage part through which the cable can pass is formed between the main pipe holding part and the branch pipe holding part. The cable passage portion is continuously provided from the end of the branch pipe in the branch pipe holding portion to the vicinity of the end of the branch pipe holding portion on the side opposite to the insertion side end of the branch pipe. A piping branch cover, which is a slit-like gap between the main pipe holding part and the branch pipe holding part, and has at least the configurations (A) to (D) . The partition space may be formed by a partition wall or a partition part.

  The main pipe is a protective pipe installed in the cable laying range from the relay box, for example, through which a plurality of cables are inserted, and the main pipe can be made of resin, steel, etc., and any corrugated pipe or straight pipe can be used. Shapes can be used. Further, the branch pipe protects a cable branched from the main pipe to each room and the like, and is preferably a corrugated pipe having flexibility.

A protrusion capable of holding the branch pipe may be formed on the inner surface of the distal end of the branch pipe holding portion .

A notch may be provided in the circumferential direction of the main pipe holding part, and the length of the cover main body may be adjustable by cutting the main pipe holding part along the notch. A plurality of the branch pipe holding parts are provided in the main pipe holding part, and a continuous space is formed between the main pipe holding part and the plurality of branch pipe holding parts via a partition wall or a partition space formed by the partition parts. In addition, a cable passage part through which the cable can pass may be formed between the main pipe holding part and the plurality of branch pipe holding parts.

According to the first invention, the main pipe and the branch pipe can be reliably held at the branch portion between the main pipe and the branch pipe, and the cable outlet opening provided in the main pipe can be reliably closed. In particular, an opening is formed at the tip of the main pipe holding part, and a continuous space is formed between the main pipe holding part and the branch pipe holding part via a partition wall or a partition space formed by the partition part. The holding part opens the opening and can be easily attached to the main pipe. The branch pipe holding part can also be easily inserted by opening the partition space side, that is, the opening side of the main pipe holding part. The branch pipe and the main pipe can be connected to each other. In addition, the main pipe holding portion of the cover is elastically deformable and has an arc cross-sectional shape that can cover more than half the circumference of the main pipe (the arc length is longer than the semicircle), so that the main pipe can be securely held. it can. The tip of the main pipe holding part is the lower end of the main pipe holding part and the end opposite to the branch pipe holding part forming side.

In addition, since a cable passing part through which a cable can pass is formed between the main pipe holding part and the branch pipe holding part, and a gap is formed so that the main pipe holding part and the branch pipe holding part are not completely connected, The cover can be attached to the main pipe and the branch pipe with the cable inserted into the main pipe and the branch pipe. For this reason, it is not necessary to remove the cable when the cover is mounted, or it is not necessary to insert the cable through the cover in advance, and the workability is excellent. In addition, since a cable passing part is provided between the main pipe holding part and the branch pipe holding part and the upper part of the main pipe holding part is open and not connected in the circumferential direction, it is easier to attach the main pipe holding part to the main pipe. Further, the end portion of the main tube holding portion can be opened by being elastically deformed. For this reason, it is excellent in the attachment property to the main pipe of a cover.

In addition, if the cable escape portion is an opening formed continuously from the end of the branch pipe in the insertion direction, the cover can be securely attached and detached with the cable inserted into the main pipe and the branch pipe. If the protrusion is provided on the inner surface of the distal end of the branch pipe, the branch pipe that is a corrugated pipe can be more reliably held.

Moreover, if a notch is provided in the circumferential direction of the main pipe holding portion, the cover can be folded (or cut) along the notch. For this reason, the length of the cover can be adjusted according to the state of use. Further, when a plurality of covers are provided, the branch portion can be made compact by shortening the length of at least one cover. Moreover, if it has a cover part, when hold | maintaining a main pipe with a main pipe holding part, it is possible to attach reliably with a main pipe. Further, a plurality of (for example, two) branch pipe holding portions are provided in the main pipe holding portion, and a cable passage portion through which a cable can pass is formed between the main pipe holding portion and the plurality of branch pipe holding portions as a whole. A pipe branching structure into a plurality of branch pipes can be easily formed.

2nd invention uses the piping branch cover concerning 1st invention, and connects the 1st cable passed in the 1st branch pipe in the said main pipe from the opening part provided in the main pipe (a And (b) providing the main pipe with a first pipe branch cover in the main pipe so as to cover the opening, and the branch pipe holding part of the first pipe branch cover with the first pipe A cable laying method comprising the step (c) of connecting branch pipes. In this case, the steps (a) to (c) are repeated, and a plurality of the openings are provided in the main pipe with a predetermined interval, and the cables passed through the branch pipes are connected to the openings. The pipe branch cover is provided in the main pipe so as to cover each opening, and the branch pipe is connected to the branch pipe holding portion of each of the pipe branch covers, A plurality of branch portions may be formed in the main pipe.

A step (d) of using the piping branch cover according to the first invention, passing the first cable through the main pipe, and taking out the opening from the opening provided in the main pipe; and A step (e) of connecting to the pipe, a step (b) of providing a first pipe branch cover on the main pipe by the main pipe holding portion so as to cover the opening, and the branch of the first pipe branch cover And (c) connecting the first branch pipe to a pipe holding section.

In the step (b), the first pipe branch cover is provided so as to cover a part of the opening, and the second cable passed through the second branch pipe after the step (b). (F) through the opening to the main pipe, and the second pipe branch cover at the main pipe holding part so as to be adjacent to the first pipe branch cover and cover the entire opening. (G), and a step (h) of connecting the second branch pipe to the branch pipe holding portion of the second pipe branch cover.

According to the second invention, an internal cable branch structure can be formed by a simple method at a desired position of the main pipe, and the cable can be laid easily. Further, water and the like do not enter the main pipe from the formed branch structure.

Further, if a plurality of covers are provided so as to cover one opening, a plurality of branch portions can be formed from one opening provided in the main pipe. For this reason, for example, when a main pipe is passed between the upper floor and the lower floor, and branch pipes are laid in each room on the upper and lower floors, it is not necessary to provide an unnecessarily large number of openings in the main pipe.

In addition, by providing openings in the main pipe with predetermined intervals and inserting cables through the openings, for example, when laying cables in adjacent rooms on the same floor, If an opening is provided at a close position, a branch pipe that is longer than necessary is not required, and cable laying work is easy.

According to a third aspect of the present invention, there is provided a main pipe having an opening through which a cable is passed and the cable is taken out to the outside, a cover provided so as to cover the opening of the main pipe, and the lead taken out from the opening A branch pipe through which a cable is passed, and the resin cover has a main pipe holding part for holding the main pipe and a branch pipe holding part for holding the branch pipe, and the main pipe holding part And the branch pipe holding part form a continuous space via a partition wall or a partition space formed by the partition part, and the cable is connected between the main pipe holding part and the branch pipe holding part. A cable passing portion that can pass is formed, and the cable passing portion is connected to the branch pipe holding portion on the side opposite to the insertion side end portion of the branch pipe from the insertion side end portion of the branch pipe in the branch pipe holding portion. The main part provided continuously to the vicinity of the end of the A slit-like gap between the holding part and the branch pipe holding part, the tip of the main pipe holding part is open, and the holding space of the main pipe holding part is smaller than the cross section of the main pipe, and the main pipe Is attached to the main pipe holding part, the main pipe holding part is opened by elastic deformation so as to sandwich the main pipe, and the holding space of the branch pipe holding part is smaller than the cross section of the branch pipe, When the pipe is inserted into the branch pipe holding part, the branch pipe holding part opens by elastic deformation so as to sandwich the branch pipe .

A plurality of cables are taken out from the opening, the cover is provided so as to cover the opening, and the branch pipes are connected to the covers having the plurality of covers or the plurality of branch pipe holding portions, respectively, A cable may be passed through the branch pipe.

According to the third invention, the cover is provided at the branch portion between the main pipe and the branch pipe, and the main pipe can be attached so as to be held by elastic deformation of the main pipe holding portion. In particular, an opening is formed in a part of the main pipe holding part, and a continuous space is formed between the main pipe holding part and the branch pipe holding part, which is formed by the partition wall or the partition part, through the partition space. The main pipe holding part can be easily attached to the main pipe by opening the opening, and the branch pipe holding part can also be easily inserted by opening the partition space side, and the branch pipe and the main pipe can be easily connected. Can connect. In addition, it is possible to reliably close the opening provided in the main pipe, prevent water and the like from entering, and obtain a piping structure of a cable branching portion that is simple and excellent in workability.

In addition, when a plurality of cables branch from one opening provided in the main pipe, a plurality of covers are provided so as to close the opening, or a single cover having a plurality of branch pipes is used. Since the openings can be closed and branch pipes can be connected to the respective branch pipe holders, the branch pipes and the like can be reliably held even in a piping structure with multiple branches at one place. In addition, water and the like can be prevented from entering the main pipe.

  According to the present invention, the cable housed in the protective tube can be easily branched as necessary, and there is no intrusion of water or the like from the branch portion into the protective tube, and the cable protective tube is excellent in workability and appearance. A piping structure or the like can be provided.

It is a figure which shows the piping branch structure 1, (a) is a perspective view, (b) is an axial sectional view of (a), (c) is a perspective view which shows the piping branch structure 1 using a straight pipe. It is a perspective view which shows the cover 7, (a) is an upper perspective view, (b) is a lower perspective view. It is a figure which shows the cover 7, (a) Front view, (b) is the sectional view on the AA line of (a). The figure which shows the construction method of piping branch structure. The figure which shows the construction method of the piping branch structure with a some branch. It is a figure which shows the cover 7, (a) is a side view, (b) is a figure which shows the state which cut | disconnected the cover 7 by the notch part 17. FIG. The figure which shows the piping structure 20. FIG. The figure which shows the piping structure 30. The figure which shows the piping structure 40. The figure which shows the method of laying the cable 9. FIG. The figure which shows the cover 7 '. The figure which shows the cover 7 ''. (A) is a figure which shows the cover 7 "", (b) is a figure which shows the cover "".

  Hereinafter, the piping branch structure 1 concerning embodiment of this invention is demonstrated. 1A and 1B are views showing a pipe branching structure 1, in which FIG. 1A is a perspective view and FIG. 1B is an axial sectional view.

  The main pipe 3 and the branch pipe 5 are corrugated pipes having flexibility, and peaks and valleys are alternately formed on the entire outer periphery. In addition, as shown in FIG.1 (c), although main pipes 3a, such as a steel pipe instead of a corrugated pipe, can also be used, in the following description, the example of a corrugated pipe is demonstrated as the main pipe 3. FIG. The branch pipe 5 may also be a straight pipe, but is preferably a corrugated pipe having flexibility for cable handling. The waveform formed on the outer periphery of the branch pipe 5 may be a spiral groove or an independent groove.

  The main pipe 3 and the branch pipe 5 are preferably made of a resin having flexibility, for example, a polyolefin resin, and more preferably polyethylene or polypropylene. Further, it is desirable that a lubricant is added. The lubricant is preferably compatible with the resin constituting the main pipe 3 and the branch pipe 5, and for example, a fatty acid-based lubricant can be used.

  When included in polyolefin resins, it is recommended to use unsaturated fatty acid amide-based lubricants. These fatty acid amide compounds melt with the resin and migrate to the surface of the resin in the subsequent molding process to exhibit lubricity. . In particular, oleic acid amide, stearic acid amide, erucic acid amide and the like exhibit good lubricity.

  As the fatty acid-based lubricant, for example, a mixture of polyacrylate, polyhydric alcohol, fatty acid salt and the like can be used. However, when these lubricants are contained in a resin, the moldability may be lowered. It is used as an external lubricant for improving the lubricity on the contact surface of the tube, and when used by spraying or applying to the inner surface of the tube after molding, the cable slips better and the wiring operation becomes easier. (For example, refer to Japanese Unexamined Patent Application Publication Nos. 2006-158197 and 2006-132586 as such a lubricant.)

  In the pipe branching structure 1, the main pipe 3 and the branch pipe 5 are connected by a cover 7. The cable 9 in the main pipe 3 is taken out from a cable opening 11 provided in the main pipe 3 and is inserted into the branch pipe 5. The main pipe 3 is held by the main pipe holding part 15 of the cover 7, and the branch pipe 5 is held by the branch pipe holding part 13 of the cover 7. A branch pipe holding projection 14 is provided on the inner surface near the tip of the branch pipe holding portion 13, and the waveform of the outer periphery of the branch pipe 5 inserted into the branch pipe holding portion 13 is locked and fixed by the branch pipe holding projection 14. . The cover 7 is provided so as to cover the entire cable opening 11.

  The cable opening 11 may be formed in advance when the main pipe 3 is manufactured. In this case, the cable opening 11 may not be formed directly, and for example, a cut-out part or a thin part for opening formation may be provided. Moreover, you may form an opening part in the arbitrary positions of the main pipe 3 as needed when performing the branch construction of a cable. In this case, the cable opening 11 may be partly cut off if the main pipe 3 is a resin pipe, or may be provided with a hole if it is a steel pipe. The method for forming the cable opening 11 can be performed by any method.

  Next, the cover 7 will be described in detail. 2 and 3 are views showing the cover 7, FIG. 2 (a) is a top perspective view, FIG. 2 (b) is a bottom perspective view, and FIG. 3 (a) is a front view of the cover 7 (branch pipe). FIG. 3B is a cross-sectional view taken along line AA of FIG.

  The cover 7 is mainly composed of a main pipe holding part 15, a branch pipe holding part 13 and the like. The cover 7 is made of resin and can be elastically deformed. A branch pipe holding part 13 is formed on the main pipe holding part 15. The branch pipe holding part 13 is formed from one end of the main pipe holding part 15 to the vicinity of the center in the axial direction of the main pipe holding part 15. A notch portion 17 is formed in the circumferential direction in the main pipe holding portion 15 in a range where the branch pipe holding portion 13 is not formed. At the position where the notch portion 17 is formed, the thickness of the main pipe holding portion 15 is reduced.

  The main pipe holding portion 15 of the cover 7 is a semi-cylindrical portion having an inner surface shape corresponding to the outer shape of the main pipe 3 (having a holding space slightly smaller than the outer diameter of the main pipe 3). The cover 7 (main pipe holding portion 15) can cover more than half of the entire circumference of the main pipe 3. That is, the cross-sectional shape of the main pipe holding portion 15 is an arc cross-sectional shape having an arc length longer than a semicircle. Since the cover 7 has elasticity, when the cover 7 is fitted to the main pipe 3, the cover 16 is pressed against the main pipe 3, so that the opening 16 (lower end) of the main pipe holding portion 15 is pressed against the outer peripheral portion of the main pipe 3. Then, it is elastically deformed while sliding, and is fitted into the main pipe 3. Further, in the state where the cover 7 is put on the main pipe 3, the cover 7 covers at least half of the circumference of the main pipe 3, and the lower end of the cover 7 holds the outer circumference of the main pipe 3, so that the cover 7 can reliably hold the main pipe 3. .

  As shown in FIG. 3A, a branch pipe holding part 13 is provided above the main pipe holding part 15 (on the side opposite to the opening 16 side of the main pipe holding part 15). The branch pipe holding portion 13 has a substantially cylindrical shape, and has an inner diameter corresponding to the outer diameter of the branch pipe 5 (a holding space slightly smaller than the outer diameter of the branch pipe 5). Further, as shown in FIG. 3B, a branch pipe holding projection 14 is provided on the inner surface near the tip of the branch pipe holding portion 13. The branch pipe holding projection 14 can hold a waveform provided on the outer periphery of the branch pipe 5 to be inserted. Note that the branch pipe holding projections 14 do not have to be provided on the entire inner surface of the branch pipe holding part 13 and may be provided on a part of the circumference.

  The branch pipe holding part 13 and the main pipe holding part 15 are formed in the same axial direction and have a substantially snowman-like cross-sectional shape. A cable passage part 19 is formed between the branch pipe holding part 13 and the main pipe holding part 15. The cable passage portion 19 is a partition space that divides both holding spaces into spaces by partition protrusions 22 formed between the branch tube holding portion 13 and the main tube holding portion 15. Therefore, the cable passage portion 19 forms a space in which the space on the branch pipe holding portion 13 side and the space on the main pipe holding portion 15 side are continuous. That is, the cable passing portion 19 is continuous from the end portion of the branch pipe in the insertion direction side in the cover axial direction (the direction of arrow F in FIG. 3B and the direction perpendicular to the front end face shown in FIG. 3A). This is an opening formed in the vicinity of the end of the cover 7 where the end of the branch pipe to be inserted is located (the branch pipe holding part 13 on the side opposite to the branch pipe insertion port). It is a slit-like gap (opening) provided continuously up to the vicinity of the end of the head.

  Note that the main pipe 3 and the branch pipe 5 do not come into contact with each other in a state where the main pipe 3 is held by the main pipe holding portion 15 and the branch pipe 5 is held by the branch pipe holding portion 13 by the partition projections 22. Moreover, the aspect of the cover 7 is not restricted to what is shown in FIG. 2, FIG. For example, an uneven shape may be provided on the inner surface of the cover 7 according to the outer shape of the main pipe 3, and the cross-sectional shapes of the main pipe holding part 15 and the branch pipe holding part 13 are appropriately determined according to the cross-sectional shapes of the main pipe 3 and the branch pipe 5. Can be changed.

  Next, the process for forming the branch structure will be described. FIG. 4 is a diagram illustrating a process of forming a pipe branch structure in the main pipe 3. First, as shown in FIG. 4A, the main pipe 3 is laid. Further, the cable 9 to be branched is previously connected to the branch pipe 5 having a predetermined length (laying distance from the branch portion). In addition to the length of the branch pipe 5, the length of the cable 9 to be passed may be a length corresponding to the length that is passed from the branch portion into the main pipe 3. In FIG. 4A, the position B in the figure is a branching portion.

  Next, as shown in FIG. 4B, the cable opening 11 is formed at the branch position. For example, a part of the main pipe 3 may be excised from the cable opening 11. In this state, the cable 9 previously inserted into the branch pipe 5 is inserted into the main pipe 3 through the cable opening 11.

  When installing the main pipe 3 and forming a branch portion, as shown in FIG. 4C, the cable 9 is connected to the main pipe 3 from the relay box side of the main pipe 3 in which the cable opening 11 is formed in advance. The cable 9 taken out from the cable opening 11 may be passed through the branch pipe 5.

  When the cable 9 is passed through the main pipe 3 and the branch pipe 5, the cover 7 is then attached to the main pipe 3 so as to close the cable opening 11 as shown in FIG. 4 (d). The cable opening 11 is closed by the cover 7. The cable 9 in the main pipe 3 passes through the branch pipe holding portion 13 of the cover 7 from the main pipe 3 and is passed through the branch pipe 5. At this time, as described above, since the cable passage portion 14 is formed in the cover 7, the cover 7 can be detached while the cable 9 is passed.

  Finally, as shown in FIG. 4 (e), the tip of the branch pipe 5 is inserted into the branch pipe holding portion 13. The branch pipe 5 is held by the branch pipe holding part 13. As described above, the branch pipe 5 and the main pipe 3 are joined at the branch portion, and the cable 9 is further passed from the main pipe 3 to the inside of the branch pipe 5 to form the branch portion. The cover 7 may be attached to the main pipe 3 after the branch pipe 5 is inserted into the branch pipe holding portion 13 of the cover 7.

  FIG. 5 is a diagram illustrating a process of forming another branch structure. First, after the branch structure is formed by the above-described method, as shown in FIG. 5A, the cover 7 which is the first piping section cover is removed. In addition, you may implement the following processes before attaching the cover 7 after the process of Fig.4 (a)-(c).

  Next, as shown in FIG. 5 (b), another cable 9a is connected to the cable opening 11 through which the cable 9 has already been passed, in the same procedure as in FIGS. 4 (a) to 4 (c). Connect the line. The cable 9a is previously connected in the branch pipe 5a in the same manner as the cable 9. As described above, the cables 9 and 9a are passed through the main pipe 3, and the cables 9 and 9a are passed through the branch pipes 5 and 5a, respectively.

  Next, as shown in FIG. 5C, the cover 7 is attached to the main pipe 3, and the branch pipe 5 a is connected to the branch pipe holding portion 13 of the cover 7. At this time, the cover 7 is attached so as not to completely block the cable opening 11. Accordingly, the cable 9 is drawn out from the main pipe 3 through the cable opening 11 exposed without being covered by the cover 7 and is passed through the branch pipe 5.

  From this state, as shown in FIG. 5 (d), a cover 7 a that is a second piping section cover is provided so as to be provided alongside the cover 7. That is, the cover 7 a is installed so as to close the cable opening 11 that is exposed without being covered with the cover 7. Therefore, the cable opening 11 is completely closed by the covers 7 and 7a. In addition, the cover 7a in a figure shows what the length adjustment was performed. The length adjustment of the cover 7a will be described later. The branch pipe 5 is connected to the cover 7a. As described above, two branch pipes (cables) can be branched from one cable opening 11 (branch part).

  The length of the cover 7 is adjusted as necessary. That is, since the covers 7 and 7a are provided side by side, if used as they are, the length becomes the length of two covers, and the length of the branch portion becomes longer. For this reason, it is desirable to adjust the length of at least one cover. Further, a cover having a length of two may be integrally formed in advance. For example, a cover in which the covers 7 and 7a in FIG. 5D are integrated may be used. When an integral cover is used, for example, the cable 9a may be inserted in advance into the branch pipe holding portion of the cover.

  FIG. 6 is a diagram illustrating a method for adjusting the length of the cover 7. As shown in FIG. 6A, the main pipe holding portion 15 of the cover 7 is formed with a notch portion 17 in the circumferential direction. As shown in FIG. 6B, the cover 7 can be cut using the notch 17 as a trigger. That is, the cover 7 can be folded at the notch portion 17, or the cover 7 can be easily cut at the notch portion 17 with a cutter or the like. As described above, the length of the cover 7 can be shortened.

  Next, the laying form of the cable having a piping structure will be described. FIG. 7 is a diagram illustrating the piping structure 20, for example, a diagram illustrating a state where cables are drawn into each room in an apartment house such as an apartment. An external cable is connected to the relay box 23, for example. From the relay box 23, main pipes 3 and 3a are connected. In the example of FIG. 7, for example, main pipes 3 and 3a are laid on each floor and branched near the cable insertion opening 21 provided for each room. A cover 7 is provided at the branch portion, and the branch pipe 5 is connected thereto. The cable passes from the relay box 23 through the main pipes 3 and 3a, is inserted into the branch pipe 5 at the branching portion, and is drawn into each room.

  FIG. 8 is a view showing another piping structure 30. The main pipe 3 is connected from the relay box 23. In the example of FIG. 8, for example, the main pipe 3 is laid between the upper and lower floors, and is branched in the vicinity of the cable insertion opening 21 provided for each room. In the branch part, as shown in FIG. 5, two branch pipes 5a and 5b are connected to one cable opening. One branch pipe 5a branched at the branch portion is drawn into the cable insertion hole 21 in the upper floor side room, and the other branch pipe 5b is drawn into the cable insertion hole 21 in the lower floor room. Two covers 7 are provided at the branch portion. The cable passes through the main pipe 3 from the relay box 23, is inserted into the branch pipes 5a and 5b at the branch portion, and is drawn into each room.

  FIG. 9 is a view showing still another piping structure 40. The main pipe 3 is connected from the relay box 23. In the example of FIG. 9, for example, the main pipe 3 is laid between the upper and lower floors, and is branched in the vicinity of the cable insertion opening 21 provided for each room. When the position of the cable insertion hole 21 in each room is symmetric with respect to the center of the adjacent room, after connecting the two branch pipes 5c and 5d to one cable opening in the branch part on one side. The branch pipes 5c and 5d are routed along the main pipe 3 in the direction opposite to the branch direction, and one branch pipe 5d is drawn into the cable insertion hole 21 in the upper floor room, and the other branch pipe 5c is It is drawn into the cable insertion hole 21 in the room on the floor. A cover 7 is provided at the branch portion, and the cable passes from the relay box 23 through the main pipe 3 and is inserted into the branch pipe 5 and the like at the branch portion and drawn into each room.

  Next, a method when the cable 9 is further passed through the laid main pipe 3 after laying will be described. FIG. 10 is a diagram illustrating a process of passing the cable 9 into the main pipe 3 that has already been laid, for example, when the cable 9 is newly inserted into the main pipe 3 to increase the number of branch portions. In the example of FIG. 10, an example in which the cable 9 is routed to the main pipe 3 from the cable opening 11 newly provided near the branch part to be added to the relay box 23 will be described.

  First, a dummy cable opening 11a is constructed at an intermediate portion or the like in a range where the cable 9 is to be routed. The cable opening 11a is preferably, for example, an intermediate point from the start point to the end point of the line, or near the corner portion of the laid main pipe 3 as shown in FIG.

  Next, as shown in FIG. 10B, the end of the cable 9 is inserted from the cable opening 11 (in the direction of arrow C in the figure). The cable 9 may be previously connected to the branch pipe, and may be drawn into the cable insertion port 21 as necessary.

  Next, the cable 9 is fed into the main pipe 3, and the end of the cable 9 is connected to the cable opening 11a. When the cable 9 is connected to the cable opening 11a, the end of the cable 9 is taken out from the cable opening 11a (in the direction of arrow D in the figure).

  When the cable 9 having a certain length is pulled out from the cable opening 11a, the end of the cable 9 is inserted again into the cable opening 11a and fed toward the relay box 23 (in the direction of arrow E in the figure).

  In this state, as shown in FIG. 10C, the cable 9 is further fed from the cable opening 11 and the cable 9 is pulled out from the cable opening 11a, and at the same time, the cable 9 is fed from the cable opening 11a. . That is, the work of passing the cable 9 is performed from a plurality of locations of the laid main pipe 3.

  For this reason, for example, for the wiring work from the cable opening 11 into the main pipe 3, only the line resistance from the cable opening 11 to the cable opening 11a is received, and the cable opening 11a The through line receives only the through line resistance from the cable opening 11 a to the relay box 23. For this reason, even if it is a long distance wiring work, the cable 9 can be easily passed.

  In particular, in the vicinity of the corner portion of the laid protective tube, the cable 9 is caught and the wiring operation is difficult, but the cable cable opening 11a (that is, the wiring operation portion) is provided in the vicinity of the corner portion. Then, since the cable 9 can be easily guided, the wiring work is easy.

  The cable openings 11a may be arranged not only at one place but at a plurality of places. Further, the dummy cable opening 11a is completely closed after the wiring operation.

  As described above, according to the piping structure according to the present embodiment, the cover 7 having the cable escape portion is used, the main pipe 3 and the branch pipe 5 are held, and the cable is branched. Good workability. Further, since the cable opening 11 is completely covered by the cover 7, there is no intrusion of water or the like from the branch portion into the main pipe 3 or the like.

  Even when a plurality of branches can be formed from one place, the cover 7 is also provided, so that a plurality of branches can be reliably formed. At this time, since the notch portion 17 is provided in the cover 7, the length of the cover 7 can be easily adjusted. For this reason, even when the cover 7 is provided, the length of the branch portion can be shortened.

  Since the cable passing portion is formed in the cover 7, the cover 7 can be easily attached and detached even when the cable is inserted through the main pipe 3 and the branch pipe 5, and the cover can be easily replaced or expanded. If a branch part is formed using the cover 7, it is excellent in workability | operativity and the piping branch structure without the penetration | invasion of water etc. can be obtained easily.

  In addition, since an opening is formed below the main pipe holding portion 15 and a continuous space is formed between the main pipe holding portion 15 and the branch pipe holding portion 13 via a partition space, the main pipe holding portion has 15 openings. And can be easily attached to the main pipe 3. Moreover, since the branch pipe holding part 13 is also continuous with the main pipe holding part 15, the branch pipe 5 can be easily inserted by opening the partition space side or the opening side of the main pipe holding part. And the main pipe 3 can be connected.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

  For example, the method of forming two branch portions from one cable opening is shown, but more branch portions may be provided. For example, if three or more covers are provided, three or more branch portions can be formed in one cable opening. Further, if the diameters of the main pipe holding part 15 and the branch pipe holding part 13 of the cover 7 are made substantially the same, a branching structure between the main pipes and the branch pipes can be obtained.

  Further, as shown in FIG. 11, a cover 7 'having a partition portion 22a may be used. In the cover 7 ′, the main pipe holding part 15 and the branch pipe holding part 13 are partitioned by the partition part 22 a. The partition portion 22a is not in the form of a protrusion protruding in the direction of the cable passage portion 19, and the cable passage portion 19 corresponding to the thickness of the partition portion 22a is formed between the main pipe holding portion 15 and the branch pipe holding portion 13 by the partition portion 22a. A space is formed. The same effect as that of the cover 7 can be obtained by the cover 7 '.

  Further, as shown in FIG. 12, a cover 7 ″ having a lid portion 25 may be used. FIG. 12A is a diagram illustrating a state in which the lid portion 25 is opened, and FIG. 12B is a diagram illustrating a state in which the lid portion 25 is closed. The cover 7 ″ is connected to one end of the main pipe holding portion 15 on the opening 16 side through a thin portion 27. A coupling protrusion 31 that is a coupling portion that projects inward is formed at the end of the lid portion 25. A coupling groove 29 that is a coupling portion is formed on the outer surface of the other end portion on the opening 16 side of the main pipe holding portion 15 (the end portion on the opposite side to the thin portion 27 joined to the lid portion 25). .

  The lid portion 25 can be rotated around the thin portion 27 as a base point. In the state shown in FIG. 12 (a), the main pipe 3 can be inserted into the main pipe holding portion 15, similarly to the cover 7 described above. After the main pipe 3 is fitted to the main pipe holding part 15, the cover part 25 is closed as shown in FIG. At this time, the lid portion 25 is closed with the thin portion 27 as a starting point, and the coupling protrusion 31 is fitted and coupled to the coupling groove 29. Accordingly, the lid 25 is fixed so as to close the opening 16. The effect similar to that of the cover 7 can be obtained by the cover 7 ″. In addition, the main pipe 3 can be more reliably held by the main pipe holding portion 15.

  Further, as shown in FIG. 13A, a cover 7 '' 'having a plurality of branch pipe holding portions 13a, 13b may be used. In the cover 7 ″ ″, two branch pipe holding portions 13 a and 13 b are formed with respect to one main pipe holding portion 15. A cable passage part 19 is formed between the main pipe holding part 15 and each branch pipe holding part 13a, 13b. That is, the main pipe holding part 15 and the branch pipe holding parts 13a and 13b are spatially continuous by the cable passing part 19. A partition projection 22b is formed between the branch pipe holding portions 13a and 13b. The partition protrusion 22b partitions each branch pipe inserted into the branch pipe holding portions 13a and 13b. The same effect as that of the cover 7 can be obtained by the cover 7 ″ ″. In addition, a plurality of branch pipes can be held by one cover, and a branch structure of the plurality of branch pipes can be easily formed. Note that the cover 7 ″ ″ only needs to be able to hold the branch pipe without providing the partition protrusion 22 b. Further, like the cover ″ ″ ″ shown in FIG. 13B, the branch pipe holding portions 13 a and 13 b may be provided separately from each other. In this case, each branch pipe holding part 13a, 13b communicates with the main pipe holding part 15 by the cable passage part 19, and the space is continuous.

1, 20, 30, 40 .... Pipe branching structure 3 .... Main pipe 5 .... Branch pipe 7 .... Cover 9 .... Cable 11 .... Cable opening 13 ...... Branch pipe holding part 14 ......... branch tube holding projection 15 ......... main tube holding portion 16 ......... opening portion 17 ......... notch portion 19 ......... cable passage portions 22, 22b ......... dividing projection 22a ......... dividing portion 21 ... ...... Cable insertion port 23 ... Relay box 25 ... Lid 27 ... Thin wall 29 ... Connection groove 31 ... Connection protrusion

Claims (12)

A resin cover attached to the main pipe through which the cable is routed,
A main pipe holding portion for holding the main pipe;
A branch pipe holding portion for holding a branch pipe through which the cable taken out from the opening provided in the main pipe is passed;
Comprising at least
(A) forming a continuous space between the main pipe holding part and the branch pipe holding part via a partition space;
(B) The front end of the main pipe holding part is open, the holding space of the main pipe holding part is smaller than the cross section of the main pipe, and the main pipe is sandwiched between the main pipe holding part and the main pipe holding part. The main tube holding part can be opened by elastic deformation,
(C) In the state where the holding space of the branch pipe holding part is smaller than the cross section of the branch pipe and the branch pipe is inserted into the branch pipe holding part, the branch pipe holding part is sandwiched between the branch pipes. It can be opened by elastic deformation,
(D) A cable passage part through which the cable can pass is formed between the main pipe holding part and the branch pipe holding part,
The cable passing portion is continuously provided from the branch pipe insertion side end of the branch pipe holding portion to the vicinity of the end of the branch pipe holding portion on the opposite side of the branch pipe insertion side end. In addition, a slit-like gap between the main pipe holding part and the branch pipe holding part,
A pipe branch cover comprising at least the configurations (A) to (D) above. The piping branch cover according to claim 1, wherein the partition space is formed by a partition wall or a partition portion. A tip inner surface of the branch pipe holding portion, the pipe branch cover as claimed in claim 1 or claim 2, characterized in that can hold projections of said branch pipe is formed. The main pipe holder notch is provided in the circumferential direction of the claim from claim 1, characterized in that along said notch is adjustable the length of the cover body by cutting the main pipe holder The piping branch cover according to any one of 3 above. An openable / closable lid is formed at the opening of the main pipe holding part, and one end of the lid part and a tip of one side of the opening of the main pipe holding part are joined by a thin part, and the lid A coupling portion that can be coupled to each other is formed at the other end portion of the portion and the tip of the other side of the opening of the main pipe holding portion, and the opening of the main pipe holding portion can be blocked when the lid portion is closed. pipe branch cover as claimed in any one of claims 4, characterized in that possible is. A plurality of the branch pipe holding portions are provided in the main pipe holding portion, and a continuous space is formed between the main pipe holding portion and the plurality of branch pipe holding portions via a partition wall or a partition space formed by the partition portions. It is, between the main pipe holding portion and a plurality of said branch pipe holding unit, according to any one of claims 1 to 5, wherein the cable is the cable passage section can pass is formed Piping branch cover. Using the pipe branch cover according to any one of claims 1 to 6 ,
A step (a) of passing the first cable passed through the first branch pipe into the main pipe from an opening provided in the main pipe;
A step (b) of providing a first pipe branch cover on the main pipe at the main pipe holding section so as to cover the opening;
Connecting the first branch pipe to the branch pipe holding portion of the first pipe branch cover (c);
A cable laying method comprising the steps of: Using the pipe branch cover according to any one of claims 1 to 6 ,
A step (d) of passing the first cable through the main pipe and taking out from the opening provided in the main pipe;
Passing the first cable through a first branch pipe (e);
A step (b) of providing a first pipe branch cover on the main pipe at the main pipe holding section so as to cover the opening;
Connecting the first branch pipe to the branch pipe holding portion of the first pipe branch cover (c);
A cable laying method comprising the steps of: In the step (b), the first pipe branch cover is provided so as to cover a part of the opening,
After the step (b), a step (f) of passing the second cable passed through the second branch pipe from the opening to the main pipe;
A step (g) of providing a second pipe branch cover on the main pipe at the main pipe holding part so as to be adjacent to the first pipe branch cover and cover the whole of the opening;
Connecting the second branch pipe to the branch pipe holding portion of the second pipe branch cover (h);
The cable laying method according to claim 7 or 8 , further comprising: Repeating step (a) to step (c),
A plurality of the openings are provided at predetermined intervals in the main pipe,
In each of the openings, each cable passed through the branch pipe is passed through the main pipe,
The pipe branch cover is provided on the main pipe so as to cover each opening,
Connecting the branch pipes to the branch pipe holding portions of the respective pipe branch covers;
The cable laying method according to claim 7, wherein a plurality of branch portions are formed in the main pipe. A main pipe having an opening through which a cable is passed and which takes out the cable to the outside;
A cover provided to cover the opening of the main pipe;
A branch pipe through which the cable taken out from the opening is passed,
Comprising
The resin cover has a main pipe holding part for holding the main pipe, and a branch pipe holding part for holding the branch pipe,
Forming a continuous space between the main pipe holding part and the branch pipe holding part through a partition space formed by a partition wall or a partition part ;
Between the main pipe holding part and the branch pipe holding part, a cable passage part through which the cable can pass is formed,
The cable passing portion is continuously provided from the branch pipe insertion side end of the branch pipe holding portion to the vicinity of the end of the branch pipe holding portion on the opposite side of the branch pipe insertion side end. A slit-like gap between the main pipe holding part and the branch pipe holding part,
The tip of the main pipe holding part is open, the holding space of the main pipe holding part is smaller than the cross section of the main pipe, and the main pipe is sandwiched between the main pipe in a state where the main pipe is attached to the main pipe holding part. The holding part opens by elastic deformation,
In a state where the holding space of the branch pipe holding portion is smaller than the cross section of the branch pipe and the branch pipe is inserted into the branch pipe holding portion, the branch pipe holding portion is elastically deformed so as to sandwich the branch pipe. Piping structure characterized by opening. A plurality of cables are taken out from the opening, the cover is provided so as to cover the opening, and the branch pipes are connected to the covers having the plurality of covers or the plurality of branch pipe holding portions, respectively, The piping structure according to claim 11, wherein a cable is passed through the branch pipe.

Images