JP6479443B2 - Piping structure, corrugated pipe with ribs - Google Patents

Description

  The present invention relates to a piping structure using a corrugated pipe having an opening continuous in the longitudinal direction and having excellent linear shape retention.

  Conventionally, when laying an electric wire or the like, the electric wire or the like is inserted into a protective tube. Usually, since a protective tube is tubular, in order to insert an electric wire into such a tubular member, it is necessary to sequentially feed the electric wire from an end portion. However, this work has not always been easy.

  On the other hand, there is a method in which a part of the tubular member is cut along the longitudinal direction, and an electric wire is inserted from the cut. In this case, workability is good because there is no need to feed the electric wires in the longitudinal direction.

  As such a protective tube having a cut in the longitudinal direction, there is a protective tube in which a part of the end portions is overlapped (Patent Document 1).

Special table 2009-542180 gazette

  The tubular member of Patent Document 1 can maintain a closed state by overlapping the ends of each other. However, it is difficult for the tubular member having a corrugated like Patent Document 1 to maintain a linear shape because of its flexibility. For this reason, since the tubular member is easily bent by its own weight or external force at the time of laying, it looks bad and laying work is not easy.

  This invention is made | formed in view of such a problem, and it aims at providing the piping structure etc. which used the corrugated pipe | tube excellent in linear shape retainability.

  In order to achieve the above-described object, the first invention is such that a first corrugated pipe and a second corrugated pipe are connected, and the first corrugated pipe includes an inner member and an outer member, In the inner member, a plurality of crests and troughs extending in the circumferential direction are alternately formed at predetermined intervals in the tube axis direction, and in the outer member, crests and troughs extending in the circumferential direction are formed at predetermined intervals in the tube axis direction. The second corrugated tube has a cross-sectional shape corresponding to the cross-sectional shape of the first corrugated tube, and an opening that is continuous in a tube axis direction with a part of the circumferential direction of the second corrugated tube. And a corrugated portion in which crests and troughs are alternately formed in the tube axis direction on the outer periphery of the second corrugated tube, and a tube axis direction separated by a predetermined distance in the circumferential direction of the second corrugated tube A plurality of linear rib portions extending to In the circumferential direction of the gate tube, the corrugated portion and the rib portion are alternately formed, one of the first corrugated tube and the second corrugated tube is an inner tube, the other is an outer tube, The pipe structure is characterized in that the end of the outer pipe is covered with the end.

  The first corrugated tube further includes a hinge portion for opening or fitting the inner member and the outer member, and an extending portion is formed on the tube opening side in the tube vertical cross section of the inner member, The inner member includes a curved portion and a straight portion, and in the tube vertical cross section of the outer member, an extending portion is formed on the tube opening side, and the outer member includes a curved portion and a straight portion, The extending portion of each of the inner member and the outer member may be overlapped by bending the hinge portion, and the cross section may be a closed tube. The member length of the outer member may be longer than the inner member.

  The crest portion of the outer tube and the crest portion of the inner tube may be fitted, and the trough portion of the outer tube and the trough portion of the inner tube may be fitted.

  The rib part and the corrugated part adjacent to the rib part are formed in order from one end part of the opening part at one end part of the opening part of the second corrugated pipe, At the other end of the opening, the corrugated portion and the rib portion adjacent to the corrugated portion are formed in order from the other end of the opening, and both end portions of the opening of the second corrugated tube By overlapping, the corrugated portions at both ends may be fitted together.

  The rib part formed so as to cross a part of the corrugated part at a predetermined distance in the circumferential direction of the second corrugated pipe is formed to be equal to or higher than the peak part of the corrugated part. Alternatively, the corrugated portion may be formed at the same height as the valley portion or lower than the valley portion.

  At least one of the first corrugated tube and the second corrugated tube is formed such that small diameter portions and large diameter portions are alternately formed in the tube axis direction, and the large diameter portion is fitted to the small diameter portion. The first corrugated tubes or the second corrugated tubes may be connected in the tube axis direction.

  In at least one of the first corrugated tube and the second corrugated tube, one end is the small diameter portion, the other end is the large diameter portion, and the large diameter portion covers the small diameter portion. The plurality of first corrugated tubes or the plurality of second corrugated tubes may be connected in the axial direction.

  The said piping structure may have a linear part and a bending part in a part of pipe axis direction, and the said bending part may be comprised only with the said 1st corrugated pipe.

  You may arrange | position an electric wire inside the said piping structure.

  The first corrugated tube has an end portion of the extending portion of the inner member and the end portion of the inner member in a state perpendicular to the tube in a state before the extending portions of the inner member and the outer member are fitted together. The opening dimension between the hinge part and the hinge part is larger than the opening dimension between the end part of the extension part of the outer member and the hinge part, and the hinge part. It is desirable that the opening dimension between the inner member and the inner member is larger than twice the radius of curvature of the curved portion of the inner member.

  According to 1st invention, since the 2nd corrugated pipe has the rib part extended in a pipe-axis direction in an outer peripheral part, the linear shape retainability of a corrugated pipe is excellent. Moreover, since the 1st corrugated pipe | tube is a corrugated pipe | tube which has the conventional corrugated shape, its flexibility is high. For this reason, the piping structure which combined these can combine the part which is excellent in linear shape retainability, and the part which is excellent in flexibility with a site | part.

  Moreover, the corrugated pipes can be reliably connected to each other by fitting the peaks and valleys of the first corrugated pipe and the second corrugated pipe, and disconnection and disconnection can be prevented. Here, in the piping structure of the present invention, the second corrugated pipe has a rib portion extending in the pipe axis direction on the outer peripheral portion, and the first corrugated pipe and the second corrugated pipe are crests and troughs. Are fitted, and each has a continuous opening in the tube axis direction, and can be overlapped so that the extending portions on the opening side overlap each other to form a closed tube cross-sectional shape, which will be described later. Thus, the pipe cross section may have any shape. For example, it may be a circular diameter, a substantially circular shape, a substantially elliptical shape, an oval shape, etc. In addition to the above, there are special dimensional constraints on the opening size and curved portion shape of the inner member and the outer member as shown in the embodiments. However, the present invention is not limited to the shape defined in the present application, and an arbitrary cross-sectional shape can be applied.

  Moreover, the state which closed the corrugated pipe | tube can be stably hold | maintained by overlapping the opening edge part of a 2nd corrugated pipe | tube so that rib parts and corrugated parts may mutually overlap.

  When the second corrugated pipe is fitted to the outside of the first corrugated pipe, the height of the rib part of the second corrugated pipe is the same as or higher than the peak part. It does not become smaller than the inner diameter of the inner surface. For this reason, when fitting the second corrugated tube outside the first corrugated tube, when the two ridges and the valleys are fitted to each other, the fitting of the overlapping portion becomes shallow by the rib portion. There is nothing. Also, when fitting the second corrugated pipe inside the first corrugated pipe, the height of the rib part of the second corrugated pipe is the same as or lower than the valley part, so the outer diameter of the rib part outer surface is It does not become larger than the outer diameter of the valley outer surface. For this reason, when fitting a 2nd corrugated pipe inside the 1st corrugated pipe, when fitting both peak parts and trough parts, fitting of an overlap part becomes shallow by a rib part. There is nothing.

  Moreover, a large diameter part and a small diameter part are alternately formed in a corrugated pipe | tube, and a several corrugated pipe | tube can be easily connected by making a large diameter part and a small diameter part mutually fit. In this case, the corrugated pipes can be connected without being cut or the like by adopting a unit structure in which one end portion is a large diameter portion and the other end portion is a small diameter portion.

  Moreover, the 2nd corrugated pipe | tube excellent in a linear shape can be arrange | positioned in a linear part, and a desired piping laying form can be stably maintained by arrange | positioning a 1st corrugated pipe | tube at a curved part.

  Moreover, even if it arrange | positions an electric wire inside, an internal electric wire can be hold | maintained reliably.

  Moreover, the opening dimension between the extension part edge part of an inner member and a hinge part in a pipe | tube vertical cross section is larger than the opening dimension between the extension part edge part of an outer member and a hinge part. For this reason, the insertion operation of an electric wire is easy and the retention strength at the time of closing becomes large. Moreover, the opening dimension between the extension part edge part of an outer side member and a hinge part is larger than twice the curvature radius of the curve part of an inner side member. For this reason, an overlapping part does not become large too much and it is easy to fit each other.

According to a second aspect of the present invention, there is provided a corrugated portion having an opening continuous in the tube axis direction in a part of the circumferential direction, and a corrugated portion in which peaks and valleys are alternately formed in the tube axis direction on the outer periphery of the tube, A plurality of linear rib portions extending in the tube axis direction so as to cross a part of the corrugated portion at a predetermined distance in the circumferential direction, and in the circumferential direction of the corrugated tube, the corrugated portion and the corrugated portion A ribbed corrugated tube in which rib portions are alternately formed , wherein a small diameter portion and a large diameter portion are alternately formed in the tube axis direction of the rib corrugated tube, and the large diameter portion is fitted to the small diameter portion. The ribbed corrugated tube is characterized in that the corrugated tubes with ribs are connected in the tube axis direction .

  One end of the corrugated pipe with ribs in the tube axis direction is the small diameter portion, the other end is the large diameter portion, the large diameter portion is covered with the small diameter portion, and a plurality of the ribs are attached. The corrugated tubes may be connected in the axial direction.

  According to the second invention, it is possible to obtain a corrugated tube excellent in linear shape retention.

  Moreover, a large diameter part and a small diameter part are alternately formed in a corrugated pipe with a rib, and a plurality of corrugated pipes can be easily connected by fitting the large diameter part and the small diameter part to each other. At this time, the corrugated tubes with ribs can be connected without being cut or the like by adopting a unit structure in which one end portion is a large diameter portion and the other end portion is a small diameter portion.

  ADVANTAGE OF THE INVENTION According to this invention, the piping structure using the corrugated pipe | tube excellent in linear shape retainability etc. can be provided.

FIG. 2 is a plan view showing a piping structure 10. It is a figure which shows the cross section of the piping structure, Comprising: (a) is the SS sectional view taken on the line of FIG. 1, (b) is the TT sectional view taken on the line of FIG. The perspective view which shows the corrugated pipe | tube 1 of the open state. The front view seen from the pipe-axis direction which shows the corrugated pipe 1 of the open state. (A), (b) is a figure which shows the process of closing the corrugated pipe | tube 1. FIG. The front view seen from the pipe-axis direction which shows the corrugated pipe 1 of the closed state. (A) is sectional drawing which shows the peak part 9 and the trough part 11 of the outer side member 5, (b) is sectional drawing which shows the peak part 13 and the trough part 15 of the inner side member 3, (c) is the inner side member 3 Sectional drawing which shows the state which made the peak part and trough part of the outer side member 5 fit. The perspective view which shows the corrugated pipe | tube 2 of the open state. The front view seen from the pipe-axis direction which shows the corrugated pipe 2 of the open state. The front view which looked at the corrugated pipe 2 of the closed state from the pipe-axis direction. The figure which shows the laying state of the piping structure 10. FIG. The top view which shows the corrugated pipe | tube 2a. It is a figure which shows the cross section of the corrugated pipe | tube 2a, Comprising: (a) is the UU sectional view taken on the line of FIG. 12, (b) is the VV sectional view taken on the line of FIG. It is a figure which shows the state which connected the corrugated pipe | tube 2a, (a) is a top view, (b) is sectional drawing. The front view which looked at the corrugated pipe 1a of the open state from the pipe-axis direction. (A) is the front view seen from the pipe-axis direction which shows the corrugated pipe 1b of the open state, (b) is the front view seen from the pipe-axis direction which shows the corrugated pipe 1b in the closed state. The front view seen from the pipe-axis direction which shows the corrugated pipe 1c of the open state.

(Piping structure)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a plan view showing a piping structure 10, FIG. 2A is a sectional view taken along the line S-S in FIG. 1, and FIG. 2B is a sectional view taken along the line T-T in FIG. The piping structure 10 is configured by connecting a corrugated pipe 1 that is a first corrugated pipe and a corrugated pipe 2 that is a second corrugated pipe.

  In the corrugated tube 1, a plurality of crests 9 and troughs 11 extending in the circumferential direction are alternately formed at predetermined intervals in the tube axis direction. Similarly, in the corrugated tube 2, a plurality of crests 31 and troughs 33 extending in the circumferential direction are alternately formed at predetermined intervals in the tube axis direction.

  Further, the corrugated pipe 2 is formed with linear rib portions 4 extending in the pipe axis direction. A plurality of rib portions 4 are formed at a predetermined distance in the circumferential direction of the corrugated tube 2. Here, the part where the peak part 31 (35) and the valley part 33 (37) are formed becomes the corrugated part 6. Therefore, the rib portion 4 is formed in a straight line so as to cross a part of the corrugated portion 6. A detailed description of the structure of the corrugated tubes 1 and 2 will be given later.

  As shown in FIG. 2A, the end portion of the corrugated tube 2 is connected so as to cover the end portion of the corrugated tube 1. That is, the size of the corrugated tube 2 is larger than the size of the corrugated tube 2. Accordingly, the corrugated tube 1 is an inner tube and the corrugated tube 2 is an outer tube. At this time, the peak portions and the valley portions of the corrugated pipe 1 and the corrugated pipe 2 are fitted and connected to each other. For this reason, the corrugated pipes 1 and 2 do not come off.

  In this embodiment, the corrugated tube 2 is an outer tube and the corrugated tube 1 is an inner tube. However, the present invention is not limited to this. The corrugated tube 1 may be an outer tube, and the corrugated tube 2 may be an inner tube. In the following description, an example in which the corrugated tube 1 is an inner tube and the corrugated tube 2 is an outer tube will be described.

  As shown in FIG.2 (b), in the rib part 4 of the corrugated pipe | tube 2, an unevenness | corrugation is not formed in the inner and outer surface of a pipe | tube with respect to a pipe axial direction. For this reason, in the rib part 4, the corrugated pipes 1 and 2 are not fitted.

  In addition, the height of the rib part 4 is substantially the same as the height of the peak part 31 (35). Accordingly, the inner diameter of the rib portion 4 substantially matches the inner diameter of the peak portion 31 of the corrugated pipe 2. Therefore, the top part of the peak part 9 of the corrugated pipe 1 does not interfere with the rib part 4 in a state in which the top part of the corrugated part 6 of the corrugated pipe 2 is fitted. For this reason, when the peak parts and trough parts of the corrugated pipes 1 and 2 are fitted to each other, the rib part 4 does not make the fitting of the overlapping parts shallow. In addition, the height of the rib part 4 may be higher than the peak part 31 (35).

(Corrugated tube 1)
Next, details of the corrugated tube 1 will be described. FIG. 3 is a perspective view showing the corrugated tube 1, and FIG. 4 is a front view seen from the tube axis direction. The corrugated tube 1 includes an inner member 3, an outer member 5, a hinge portion 7, and the like.

  In the inner member 3, a plurality of crests 13 and troughs 15 extending in the circumferential direction are alternately formed at predetermined intervals in the tube axis direction. Similarly, the outer member 5 has a plurality of crests 9 and troughs 11 extending in the circumferential direction alternately formed at predetermined intervals in the tube axis direction. The inner member 3 and the outer member 5 are connected by a hinge portion 7.

  As shown in FIG. 4, one end portion of the inner member 3 is connected to the hinge portion 7. A predetermined range from the joint portion of the inner member 3 to the hinge portion 7 is a curved portion 17. The curved portion 17 has a constant radius of curvature C. A portion extending from the other end side of the curved portion 17 toward the tube opening portion is a straight portion 25. The straight portion 25 of the inner member 3 is referred to as an extended portion 27.

  One end of the outer member 5 is connected to the hinge portion 7. A predetermined range from the joint portion of the outer member 5 to the hinge portion 7 is a curved portion 18. The curved portion 18 has a constant radius of curvature D. A predetermined range from the other end side of the curved portion 18 is a straight portion 19. Further, a portion extending from the end portion of the straight portion 19 toward the tube opening portion is a curved portion 21. The curved portion 21 has a constant radius of curvature E. In addition, the site | part which match | combined the linear part 19 and the curved part 21 of the outer member 5 is called the extending part 23. FIG.

  The member length of the outer member 5 (that is, the total length from the connecting portion with the hinge portion 7 to the end portion of the extending portion 23) is the member length of the inner member 3 (that is, from the connecting portion with the hinge portion 7). The total length up to the end of the extended portion 27) is longer.

Further, in this embodiment, the opening dimension (A in the figure) between the end portion of the extending portion 27 of the inner member and the hinge portion 7 is the outer member before the inner member 3 and the outer member 5 are closed. 5 is desirably larger than the opening dimension (B in the drawing) between the end of the extended portion 23 (curved portion 21) and the hinge portion 7. Moreover, the opening dimension (E in the figure) between the extended part 23 end part of the outer member 5 and the hinge part 7 is larger than twice the curvature radius (C in the figure) of the curved part 17 of the inner member 3. Is desirable. That is,
A>B> 2C
It is desirable to satisfy the relationship.

  Here, it is desirable that the curvature radii C, D, and E of the curved portions are substantially the same. By doing in this way, when the pipe | tube mentioned later is closed, a mutual overlap part can be fitted reliably, and the shape of the obstruction | occlusion pipe | tube can be made into a flat pipe | tube shape. For this reason, 2C in the above formula may be 2D or 2E.

  Thus, by making the opening dimension between the end part of the extending part 27 and the hinge part 7 larger than the opening dimension between the extending part 23 end part and the hinge part 7, the electric wire described later Good insertion workability. Further, if the opening dimension between the end of the extended portion 23 and the hinge portion 7 is increased, the overlapping length described later is shortened, so that the holding force in the closed state is weakened. For this reason, it is desirable that A> B.

  Moreover, the opening dimension between the extension part 23 end part and the hinge part 7 is made larger than twice the curvature radius of the curved part 17 of the inner member 3 (that is, the diameter of the circle having the curved part 17). It is possible to suppress the superposition length from becoming excessively long. This is because if the overlapping length becomes too long, it becomes difficult to fit the inner member 3 and the outer member 5 described later. For this reason, it is desirable that B> 2C. In addition, said relationship is satisfied also in arbitrary pipe | tube vertical cross sections.

  In the present invention, the cross-sectional shape of the corrugated pipe 1 is not limited to the above-described example. The shape is not limited as long as it has an opening continuous in the tube axis direction and can be formed by overlapping the extended portions 23 and 27 on the opening side so as to overlap each other.

  Next, the usage method of the corrugated pipe | tube 1 concerning this embodiment is demonstrated. FIG. 5A is a diagram showing a released state of the corrugated pipe 1. With the corrugated tube 1 open, the electric wire 29 is inserted into the inner member 3 from the opening, for example. Note that a plurality of electric wires 29 may be provided. At this time, as described above, since the opening width of the inner member 3 is sufficiently wide, the insertion operation of the electric wire 29 is easy.

  Next, as shown in FIG. 5B, the inner member 3 and the outer member 5 are closed (arrow F in the figure). That is, the ends of the extending portions 23 and 27 are brought close to each other. In addition, at the moment when the tips of the extending portions 23 and 27 come into contact with each other, the tip of the inner member 3 is slightly crushed as necessary, so that the inner member 3 is more reliably brought into the inner surface side of the outer member 5. Can be fitted.

  FIG. 6 is a view showing a state in which the inner member 3 and the outer member 5 are further closed as they are, and the extending portions 23 and 27 are completely fitted. That is, the extended sections 23 and 27 of the inner member 3 and the outer member 5 are overlapped and fitted to each other, whereby a flat tube-shaped closed tube cross section can be obtained.

  FIG. 7A is a partial cross-sectional view of the crest 9 and the trough 11 of the outer member 5, and FIG. 7B is a partial cross-sectional view of the crest 13 and the trough 15 of the inner member 3. As described above, a plurality of crests 9 and troughs 11 are alternately formed on the outer peripheral surface of the outer member 5. A plurality of crests 13 and troughs 15 are alternately formed on the outer peripheral surface of the inner member 3. Here, the formation interval of the crests 9 or troughs 11 of the outer member 5 in the tube axis direction is equal to the formation interval of the crests 13 or troughs 15 of the inner member 3.

  Further, the crest 9 of the outer member 5 is wider than the crest 13 of the inner member 3, and the trough 15 of the inner member 3 is wider than the trough 11 of the outer member 5, more specifically. The opening width on the inner surface side of the mountain portion 9 is wider than the width of the mountain portion 13. The opening width of the valley portion 15 is wider than the protrusion width on the inner surface side of the valley portion 11.

  For this reason, as shown in FIG.7 (c), the peak part of the inner member 3 fits in the inner surface side of the peak part 9 of the outer member 5, and the trough part 15 of the outer member 5 is the trough of the inner member 3. Fits into part 11. That is, the peak portions and the valley portions of the inner member 3 and the outer member 5 are fitted to each other. It is desirable that the side taper angle on the inner surface side of the peak portion 9 and the side taper angle on the outer surface side of the peak portion 13 are substantially matched. That is, it is desirable that the side surface taper angle on the inner surface side of the valley portion 11 and the side surface taper angle on the outer surface side of the valley portion 15 are substantially matched. By doing in this way, the crests of the inner member 3 and the outer member 5 and troughs can mutually fit.

  In the present invention, in order to fit the ridges and valleys of the inner member 3 and the outer member 5 with each other, the shape of the ridges and valleys is not limited to the example shown in FIG. . FIG. 7 does not have a taper, but can be rectangular.

  Here, the hinge portion 7 has no peaks and valleys. For this reason, when the corrugated tube 1 is bent, the hinge portion 7 is expanded in the circumferential direction or reduced in diameter in comparison with the inner member 3 and the outer member 5 to open the tube or close the tube. However, the flexibility in the tube axis direction is inferior. For this reason, when the corrugated pipe 1 is bent in the pipe axis direction, the corrugated pipe 1 as a whole may not have sufficient flexibility.

  For this reason, you may form a slit toward the formation direction (circumferential direction) of a peak part and a trough part. A plurality of slits are formed at the same formation interval as the crests or troughs in the tube axis direction. For example, the slit is formed in accordance with the positions of the valley portions of the inner member 3 and the outer member 5.

  Thus, by forming the slits in the hinge portion 7 at a predetermined formation interval, the slits can be deformed when the corrugated tube 1 is bent. For this reason, the flexibility of the hinge part 7 improves.

  In addition, it is good also as a mere notch instead of a slit. Moreover, you may form a fine unevenness | corrugation (cross-sectional wave shape) in the hinge part 7. FIG. Even if it does in this way, the flexibility of the hinge part 7 can be improved. Here, the shape of the hinge portion 7 is a wave shape, a plurality of wave shapes (Ω shape), a dot shape, etc., and the extended portions 23 and 27 of the inner member 3 and the outer member 5 are brought close to each other by bending the hinge portion 7. If it can be moved or moved away, there is no need to restrict the shape.

(Corrugated tube 2)
Next, the detail of the corrugated pipe | tube 2 which is a corrugated pipe | tube with a rib is demonstrated. FIG. 8 is a perspective view showing the corrugated pipe 1, and FIG. 9 is a front view seen from the pipe axis direction. FIG. 10 is a front view showing the corrugated tube 2 with the corrugated tube 2 closed. Similar to the corrugated tube 1, the corrugated tube 2 includes an inner member 43, an outer member 45, a hinge portion 39, and the like.

  The inner member 43 of the corrugated tube 2 has a plurality of crests 35 and troughs 37 extending in the circumferential direction alternately at predetermined intervals in the tube axis direction. Similarly, in the outer member 45, a plurality of crests 31 and troughs 33 extending in the circumferential direction are alternately formed at predetermined intervals in the tube axis direction. The inner member 43 and the outer member 45 are connected by a hinge portion 39. Here, the formation interval of the crests 31 or troughs 33 of the outer member 45 with respect to the tube axis direction is equal to the formation interval of the crests 35 or troughs 37 of the inner member 43. Moreover, the formation interval of the peak part or trough part of the corrugated pipe 2 and the formation interval of the peak part or trough part of the corrugated pipe 1 are equal.

  Here, when the corrugated tube 2 is wrapped around the outer periphery of the corrugated tube 1 and fitted, the inner surface width of the peak portion 31 of the outer member 45 of the corrugated tube 2 (outer tube) is the same as that of the corrugated tube 1 (inner tube). It is desirable to make the width wider than the outer surface width of the peak portion 9 of the outer member 5. Similarly, it is desirable that the peak portion 35 of the inner member 43 of the corrugated pipe 2 is wider than the peak portion 13 of the inner member 3 of the corrugated pipe 1. In addition, the opening width of the valley portion 15 of the inner member 3 of the corrugated tube 1 is desirably wider than the inner surface protrusion width of the valley portion 37 of the inner member 43 of the corrugated tube 2. Similarly, it is desirable that the valley 11 of the outer member 5 of the corrugated pipe 1 is wider than the valley 33 of the outer member 45 of the corrugated pipe 2.

  By doing in this way, the peak parts of corrugated pipes 1 and 2 and trough parts fit. It is desirable that the side taper angle on the inner surface side of the crest (or valley) of the outer tube and the side taper angle on the outer surface side of the crest (or trough) of the inner tube are substantially matched. By doing in this way, peak parts and trough parts can fit each other more reliably.

  Further, as described above, the corrugated tube 2 is formed with a plurality of linear rib portions 4 extending in the tube axis direction with a predetermined distance in the circumferential direction. The rib part 4 is a site | part in which a peak part or a trough part is not formed.

  As shown in FIG. 10, it is desirable that the rib portions 4 that are separated in the circumferential direction are arranged at substantially the target or symmetrical positions with respect to the center line. By doing in this way, arrangement | positioning of the corrugated part 6 also becomes a substantially object or symmetrical arrangement | positioning. As described above, the corrugated portion 6 is a portion that fits with another corrugated pipe 1. For this reason, by arrange | positioning the corrugated part 6 equally in the circumferential direction, it can be made to fit with the corrugated pipe | tube 1 in the position equivalent to the circumferential direction.

  Here, at one end portion (for example, the inner member 43) of the opening portion of the corrugated pipe 2, the rib portion 4 and the corrugated portion 6 are formed adjacent to each other in this order from the end portion. That is, the rib part 4 is formed in one edge part. In the other end portion (for example, the outer member 45) of the opening portion of the corrugated tube 2, the corrugated portion 6 and the rib portion 4 are formed adjacent to each other sequentially from the end portion. That is, the corrugated portion 6 is formed at the other end.

  The method of using the corrugated tube 2 is the same as the method of using the corrugated tube 1. That is, the outer member 45 is overlapped on the outer side of the inner member 43, and the peaks and valleys are fitted to each other. That is, the corrugated portions 6 of the inner member 43 and the outer member 45 are fitted together.

  In the illustrated example, the corrugated portion 6 at the end of the outer member 45 is fitted with the corrugated portion 6 adjacent to the rib portion 4 at the end of the inner member 43. The rib portions 4 of the outer member 45 and the inner member 43 are formed at positions corresponding to each other. Therefore, when the outer member 45 and the inner member 43 are overlapped, the rib portions 4 overlap each other in the overlapping portion.

  In this way, the corrugated portion 6 is fitted to the corrugated portion 6 adjacent to the rib portion 4 so that the corrugated portion 6 at one end is moved over the rib portion 4 at the other end portion. Is locked by the rib portion 4. Therefore, the fitting between the corrugated portions 6 is difficult to come off in the circumferential direction.

  The corrugated tube 2 has a cross-sectional shape corresponding to the corrugated tube 1. That is, the corrugated tube 2 has a shape that is slightly larger than the corrugated tube 1 so that the corrugated tube 2 can be put on the outer periphery of the corrugated tube 1, and the curved portion 17, straight portion 25, curved portion 18, straight line It has a shape corresponding to the part 19 and the curved part 21. In addition, since the detail of each part shape of the corrugated pipe | tube 2 is the same as that of the corrugated pipe | tube 1, the overlapping description is abbreviate | omitted.

  Note that if the cross-sectional shape of the corrugated tube 1 is another shape, the shape of the corrugated tube 2 may be changed corresponding to the corrugated tube 1. Further, when the corrugated tube 2 is used as an inner tube, the corrugated tube 2 may have a shape in which the corrugated tube 1 is slightly reduced. When the corrugated tube 2 is an inner tube, the outer surface of the rib portion 4 is preferably the same height as the bottom surface of the outer surface of the valley portion. By doing in this way, it can prevent that the rib part 4 interferes with the peak part or trough part of an outer tube | pipe.

(Laying the piping structure)
Next, the laying state of the piping structure 10 according to the present invention will be described. FIG. 11 is a diagram illustrating an example of a state in which the piping structure 10 is laid.

  In the piping structure 10, a straight portion 49 and a bent portion 51 are formed according to the laying place. The corrugated tube 1 is excellent in flexibility because a continuous valley shape in the circumferential direction is repeated at a predetermined formation interval in the tube axis direction. Therefore, it can be bent easily. On the other hand, the corrugated tube 2 is formed with rib portions 4 that do not have a mountain-valley shape in the tube axis direction. For this reason, since the flexibility of the rib part 4 is low, the flexibility of the corrugated pipe 2 as a whole is low. That is, the linear shape retainability is high.

  For this reason, only the corrugated pipe 1 is arranged at the bent portion 51 in the laying state of the piping structure. In addition, the corrugated tube 2 is disposed in the straight portion 49. By doing in this way, while the bent part 51 can be formed easily, it can suppress that the linear part 49 bends by dead weight etc. FIG.

  As described above, according to the piping structure 10 of the present embodiment, the bent portion 51, the straight line can be obtained by connecting and combining the corrugated pipe 1 excellent in flexibility and the corrugated pipe 2 excellent in linear shape retention. A pipe laying structure suitable for each of the portions 49 can be obtained. In particular, by arranging the corrugated tube 2 in the straight portion 49, it is possible to suppress the straight portion 49 from being deformed due to the bending of the corrugated tube or the like, and the appearance is excellent.

  Moreover, the corrugated pipes 1 and 2 can be reliably connected by fitting the peak parts and trough parts of the edge parts of the corrugated pipes 1 and 2 into each other. Further, the fitting is not released and the corrugated tube 1 is not pulled out.

  In addition, since the inner member 43 and the outer member 45 of the corrugated pipe 2 are formed by the corrugated portions 6, the fitting between the inner member 43 and the outer member 45 is difficult to come off.

  Further, by arranging the rib portion 4 in line symmetry or point symmetry with respect to the center of the corrugated tube 2, the fitting portion with the corrugated tube 1 can be disposed in a balanced manner in the circumferential direction.

  In addition, since the height of the rib portion 4 is not lower than the peak portion, the inner diameter of the peak portion inner surface is not reduced, and the outer surface of the peak portion of the corrugated tube 1 and the inner surface of the rib portion 4 interfere when connected to the corrugated tube 1. There is nothing to do.

  Further, by arranging the corrugated tube 1 in the bent portion 51, the bent portion 51 can be easily formed. In addition, by arranging the corrugated tube 2 in the straight portion 49, it is possible to suppress bending of the straight portion.

  Moreover, if both the corrugated pipes 1 and 2 satisfy the above-described relationship of A> B> 2C, the electric wire can be easily inserted and the holding force when closed is increased. In addition, the overlapping portion does not become too large, and it is easy to fit each other. That is, it is excellent in the insertion workability of the electric wire, the operation of closing the opening is easy, and the holding force when closed can be sufficiently secured.

(Second Embodiment)
Next, a second embodiment will be described. FIG. 12 is a plan view showing the corrugated tube 2a. In the following description, the same functions as those of the corrugated tube 2 are denoted by the same reference numerals as those in FIGS.

  The corrugated pipe 2a has substantially the same configuration as the corrugated pipe 2, but differs in that the diameter is not constant. In the corrugated tube 2a, a large diameter portion 55 having a relatively large outer diameter (inner diameter) and a small diameter portion 53 having a relatively small outer diameter (inner diameter) are alternately formed.

  The difference in diameter between the small diameter part 53 and the large diameter part 55 is about twice the thickness of the corrugated tube 2a. The number of repetitions and the length of the small diameter part 53 and the large diameter part 55 are not limited to the illustrated example. Moreover, although the illustrated example shows an example in which one end portion is the small diameter portion 53 and the other end portion is the large diameter portion 55, the present invention is not limited thereto.

  13A is a cross-sectional view taken along the line U-U in FIG. 12, and FIG. 13B is a cross-sectional view taken along the line V-V in FIG. As shown in FIG. 13A, in the corrugated portion 6, the large diameter portion 55 has a larger outer diameter and inner diameter in both the peak portion and the valley portion than the small diameter portion 53. As shown in FIG. 13B, also in the rib portion 4, the large diameter portion 55 has a larger outer diameter and inner diameter than the small diameter portion 53.

  Fig.14 (a) is a figure which shows the state which connected corrugated pipe | tube 2a. As described above, one end portion of the corrugated pipe 2 a is the small diameter portion 53, and the other end portion is the large diameter portion 55. The small diameter part 53 of the corrugated pipe 2a can be fitted to the large diameter part 55 of another corrugated pipe 2a. That is, the large diameter portion 55 can be put on the outer periphery of the small diameter portion 53.

  FIG.14 (b) is sectional drawing of a fitting part. The large diameter part 55 of one corrugated pipe 2a and the peak parts and valley parts of the small diameter part 53 of the other corrugated pipe 2a are fitted together. Here, the crest inner surface width of the large diameter portion 55 is wider than the crest outer surface width of the small diameter portion 53, and is wider than the trough inner surface protrusion width of the large diameter portion 55 than the trough outer surface width of the small diameter portion 53. By doing so, as mentioned above, it can be made to fit more reliably. In addition, by matching the taper angles of the side surfaces of the crests (valleys) of the small diameter part 53 and the large diameter part 55, the crests and troughs can be reliably fitted.

  According to the second embodiment, an effect similar to that of the first embodiment can be obtained. Moreover, the same corrugated pipe | tube 2a can be connected. For this reason, it is not necessary to manufacture a corrugated pipe | tube by predetermined length beforehand by changing the number of connection according to the length of the linear part 49. FIG.

  The corrugated tube 1 may also be formed with a small diameter portion and a large diameter portion. In this case, both the corrugated tubes 1 and 2 can be an outer tube or an inner tube.

(Third embodiment)
Next, a third embodiment will be described. FIG. 15 is a front view of the corrugated pipe 1a in an opened state as seen from the pipe axis direction. The corrugated tube 1a has substantially the same configuration as the corrugated tube 1, but the inner member 3 and the outer member 5 are different from the shape of the hinge portion 7.

  The hinge portion 7 of the corrugated tube 1a is not shaped like a waveform as described above, but is shaped such that the end of the inner member 3 and the end of the outer member 5 are directly joined. Thus, in the present invention, a portion that can be bent because the inner member 3 and the outer member 5 open and close each other is defined as a hinge portion. The hinge portion 7 may have any shape as long as the inner member 3 and the outer member 5 can perform a flattening operation.

  In the inner member 3, a straight portion 26 is formed between the hinge portion 7 and the curved portion 17. Thus, in this invention, the hinge part 7 and the curve part 17 do not need to be joined directly, and both the inner member 3 and the outer member 5 should just comprise a curve part and a linear part.

  The corrugated pipe 1a also has a curvature radius C of the curved portion 17 of the inner member 3, a curvature radius D of the curved portion 18 of the outer member 5, and a curvature radius E of the curved portion 21 as in the corrugated pipe 1. The curvature radii C, D, and E of the curved portions are preferably substantially the same.

Also, with respect to the corrugated pipe 1a, in the state before the inner member 3 and the outer member 5 are closed, the opening dimension (A in the figure) between the end portion of the extending portion 27 of the inner member and the hinge portion 7 is the outer side. It is larger than the opening dimension (B in the drawing) between the end of the extended portion 23 (curved portion 21) of the member 5 and the hinge portion 7. Moreover, the opening dimension (B in the figure) between the extended portion 23 end of the outer member 5 and the hinge part 7 is larger than twice the radius of curvature (C in the figure) of the curved portion 17 of the inner member 3. That is,
A>B> 2C
Satisfy the relationship.

  By doing in this way, as above-mentioned, when a pipe | tube is closed, a mutual overlapping part can be fitted reliably, and the shape of an obstruction pipe | tube can be made into a flat tube shape.

  According to the third embodiment, the same effect as when the corrugated tube 1 is used can be obtained. That is, it can be used in connection with the corrugated tube 2 or the like. Further, by forming the straight portion 26 between the hinge portion 7 and the curved portion 17, the corrugated tube has a straight section in the corrugated tube cross section and the corrugated tube cross section due to the increase in the internal volume of the corrugated tube section. As a result, the attachment of the corrugated tube can be improved, and the tube is formed by overlapping the extended portions as compared with the case where the curved portions of the inner member 3 and the outer member 5 directly face each other across the hinge portion 7. Since the bending stress generated when closing can be received not only at the hinge portion 7 but also at the boundary portion between the straight portion and the curved portion, the bending stress applied to the hinge portion is reduced and the closed state of the tube is stabilized. Can be held.

(Fourth embodiment)
Next, a fourth embodiment will be described. FIG. 16A is a front view showing the corrugated pipe 1b in an open state as seen from the pipe axis direction, and FIG. 16B is a front view showing the corrugated pipe 1b in a closed state as seen from the pipe axis direction. . The corrugated pipe 1b is different in that it does not have the hinge portion 7.

  The corrugated tube 1b includes an inner member 3a and an outer member 5a. As with the inner member 3 and the outer member 5, the inner member 3a and the outer member 5a are each formed with a plurality of crests and troughs extending in the circumferential direction alternately at predetermined intervals in the tube axis direction. The inner member 3 and the outer member 5 are substantially C-shaped members that are partially cut off in the circumferential direction. Note that the circumferential length of the cut portion is less than ½ of the circumferential length (in the case of a circle).

  The inner member 3a has a slightly smaller outer diameter than the outer member 5a. Specifically, the outer diameter of the crest of the inner member 3a is slightly smaller than the inner diameter of the inner surface of the crest of the outer member 5a, and the outer diameter of the trough of the inner member 3a is smaller than that of the trough of the outer member 5a. Slightly smaller than the inner diameter of the inner surface. The inner member 3a is held inside the outer member 5a by fitting the inner member 3a inside the outer member 5a and fitting the ridges and valleys of each other.

  As shown to Fig.16 (a), an opening part is formed in a part of the circumferential direction of the corrugated pipe | tube 1b by aligning the position of the cut part of the inner side member 3a and the outer side member 5a. On the other hand, by closing the inner member 3a in the circumferential direction with respect to the outer member 5a (W in the figure), a closed tube as shown in FIG. 16B can be obtained. Since the circumferential length of the cut portion is less than ½ of the circumferential length (when it is a circle), the inner member 3a does not fall off the outer member 5a when closed.

  According to the fourth embodiment, the same effect as when the corrugated tube 1 is used can be obtained. That is, it can be used in connection with the corrugated tube 2 or the like. Moreover, the obstruct | occluded corrugated pipe | tube can be obtained easily by rotating the inner side member 3a and the outer side member 5a mutually in the circumferential direction, and making it slide. The inner member 3a and the outer member 5a, for example, although not particularly shown, stop the rotation of the inner member 3a and the outer member 5a of the closed corrugated pipe 1b by providing a protrusion protruding inward at a predetermined position. Can do.

(Fifth embodiment)
Next, a fifth embodiment will be described. FIG. 17 is a front view of the corrugated tube 1c in an open state as viewed from the tube axis direction, and corresponds to FIG.

  As shown in FIG. 7 of Patent Document 1, the corrugated tube 1c has the same diameter D1 between the inner member 3b and the outer member 5b, and is connected by the hinge portion 7. The outer member 5b has an opening B1 smaller than the diameter D1 so that the outer member 5b rotates at the hinge portion 7 and engages with the inner member 3b. The opening A1 of the inner member 3b is smaller than the opening B1 formed in the outer member 5b, and the inner member 3b and the outer member 5b are arranged asymmetrically with respect to the line Y passing through the hinge portion 7.

  As an example, for an annular tube having a diameter D1 of 23 mm, the distance X1 from the line Y to the edge 65a of the outer member 5b is 9 mm, and the distance Y2 from the line Y to the edge 65b of the inner member 3b is 2.5 mm. It is.

  Thus, according to the fifth embodiment, the same effect as that when the corrugated pipe 1 is used can be obtained. That is, it can be used in connection with the corrugated tube 2 or the like.

  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.

1, 1a, 1b, 1c, 2, 2a ......... corrugated tube 3, 3a, 3b, 43 ......... inner member 4 ......... rib portions 5, 5a, 5b, 45 ......... outer member 6 ......... Corrugated part 7, 39 ......... Hinge part 9, 13, 31, 35 ......... Mount part 10 ......... Piping structure 11, 15, 33, 37 ......... Valley part 17, 18, 21 ......... Curve part 19, 25, 26 ......... Linear part 23, 27 ......... Extension part 29 ......... Electric wire 49 ......... Linear part 51 ......... Bent part 53 ......... Small diameter part 55 ......... Large diameter part 65a , 65b ......... Edge

Claims (12)

The first corrugated pipe and the second corrugated pipe are connected,
The first corrugated tube is
An inner member and an outer member;
In the inner member, a plurality of crests and troughs extending in the circumferential direction are alternately formed at predetermined intervals in the tube axis direction,
In the outer member, a plurality of crests and troughs extending in the circumferential direction are alternately formed at predetermined intervals in the tube axis direction,
The second corrugated pipe is
A cross-sectional shape corresponding to the cross-sectional shape of the first corrugated tube, a portion of the second corrugated tube in the circumferential direction having an opening continuous in the tube axis direction, and an outer peripheral tube of the second corrugated tube A corrugated portion in which crests and troughs are alternately formed in the axial direction, and a plurality of linear rib portions extending in the tube axial direction at a predetermined distance in the circumferential direction of the second corrugated tube, In the circumferential direction of the second corrugated pipe, the corrugated portions and the rib portions are alternately formed,
One of the first corrugated tube and the second corrugated tube is an inner tube, the other is an outer tube, and an end portion of the outer tube is covered with an end portion of the inner tube. The first corrugated tube is
A hinge portion for opening or fitting the inner member and the outer member;
In the tube vertical cross section of the inner member, an extending portion is formed on the tube opening side, and the inner member includes a curved portion and a straight portion,
In the tube vertical cross section of the outer member, an extending portion is formed on the tube opening side, and the outer member includes a curved portion and a straight portion,
2. The piping structure according to claim 1, wherein the extending portion of each of the inner member and the outer member is overlapped by bending the hinge portion, and the cross section becomes a closed tube.   The ridge portion of the outer tube and the ridge portion of the inner tube are fitted, and the valley portion of the outer tube and the valley portion of the inner tube are fitted. 2. The piping structure according to 2. At one end of the opening of the second corrugated tube, the rib and the corrugated adjacent to the rib are formed in order from one end of the opening,
At the other end of the opening of the second corrugated tube, the corrugated portion and the rib portion adjacent to the corrugated portion are formed in order from the other end of the opening,
The piping structure according to any one of claims 1 to 3, wherein both end portions of the opening of the second corrugated pipe are overlapped and the corrugated portions of the both end portions are fitted to each other. .   The rib part formed so as to cross a part of the corrugated part at a predetermined distance in the circumferential direction of the second corrugated pipe is formed to be equal to or higher than the peak part of the corrugated part. The piping structure according to any one of claims 1 to 4, wherein the piping structure is formed at the same height or lower than a valley portion of the corrugated portion.   At least one of the first corrugated tube and the second corrugated tube has a small-diameter portion and a large-diameter portion alternately formed in the tube axis direction, and the large-diameter portion is fitted to the small-diameter portion, 6. The piping structure according to claim 1, wherein the corrugated pipes or the second corrugated pipes are connected in the pipe axis direction.   In at least one of the first corrugated tube and the second corrugated tube, one end is the small diameter portion, the other end is the large diameter portion, and the large diameter portion covers the small diameter portion. The piping structure according to claim 6, wherein the plurality of first corrugated pipes or the plurality of second corrugated pipes are connected in the axial direction. The piping structure has a straight part and a bent part in a part of the pipe axis direction,
The piping structure according to any one of claims 1 to 7, wherein the bent portion is configured by only the first corrugated pipe.   The piping structure according to any one of claims 1 to 8, wherein an electric wire is arranged inside the piping structure. The first corrugated tube is
An opening between the end of the extended portion of the inner member and the hinge portion in a vertical cross section of the tube in a state before fitting the extended portions of the inner member and the outer member. The dimension is larger than the opening dimension between the end part of the extension part of the outer member and the hinge part, and the opening dimension between the end part of the extension part of the outer member and the hinge part is larger. The piping structure according to claim 2, wherein the piping structure is larger than twice the radius of curvature of the curved portion of the inner member. A corrugated portion having an opening continuous in the tube axis direction in a part of the circumferential direction, and having crests and valleys formed alternately in the tube axis direction on the outer periphery of the tube, and a predetermined distance in the circumferential direction of the tube And a plurality of linear rib portions extending in the tube axis direction so as to cross a part of the corrugated portion, and the corrugated portions and the rib portions are alternately formed in the circumferential direction of the corrugated tube A ribbed corrugated tube,
Small-diameter portions and large-diameter portions are alternately formed in the tube axis direction of the corrugated tube with ribs, the large-diameter portions are fitted into the small-diameter portion, and the corrugated tubes with ribs are connected in the tube axis direction. ribbed corrugated pipe, characterized in that there. One end of the corrugated pipe with ribs in the tube axis direction is the small diameter portion, the other end is the large diameter portion, the large diameter portion is covered with the small diameter portion, and a plurality of the ribs are attached. The corrugated pipe with ribs according to claim 11, wherein the corrugated pipes are connected in the axial direction.

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