JP4504855B2 - Corrugated tube device, corrugated tube holder, and corrugated tube - Google Patents

Description

  The present invention relates to a corrugated tube having a cylindrical shape in which polygonal annular ridges and annular grooves are alternately formed in the axial direction, and a wave provided with a holding portion that holds the corrugated tube along its circumferential direction. The present invention relates to a corrugated tube device including a corrugated tube holder, a corrugated tube holder constituting the corrugated tube device, and a corrugated tube.

  Conventionally, pipes and cables buried in the ground are inserted into a protective pipe and protected from the outside. As the protective tube, a flexible corrugated synthetic resin tube is used. The corrugated synthetic resin pipe is configured by alternately forming annular ridges and annular grooves in the axial direction.

  A large number of corrugated synthetic resin pipes through which the pipes and cables are inserted are laid in multiple lines and buried in the ground in a multi-layered state. A large number of corrugated synthetic resin tubes stacked in multiple stages as described above are held together by a binding member (for example, a rope) so that the stacked state does not collapse. However, the work of concentrating and holding a large number of corrugated synthetic resin tubes with a bundling member requires much labor, and the corrugated synthetic resin tubes stacked in the upper stage are likely to collapse.

  For this reason, recently, when a large number of corrugated synthetic resin pipes are focused, the corrugated synthetic resin pipes can be connected to facilitate the focusing operation and the stacked corrugated synthetic resin pipes are not easily broken. A tube pillow is used (see, for example, Patent Document 1).

  The tube pillow is configured to hold two corrugated synthetic resin tubes in two upper and lower stages, and the two corrugated synthetic resin tubes can be connected to each other. That is, the tube pillow includes a lower-stage holding portion that holds the corrugated synthetic resin pipe disposed on the lower stage side, and an upper-stage holding section that retains the corrugated synthetic resin pipe disposed on the upper stage side. The lower side holding portion is made of a plate material, and is configured to hold about two-thirds of the circumference of the corrugated synthetic resin tube in a state where the corrugated synthetic resin tube is retained inside. Further, the lower stage side holding portion is formed with a lower stage side projection that can be fitted in the groove of the corrugated synthetic resin pipe on the inner surface thereof. On the other hand, the upper stage side holding portion is made of a plate material, and is configured to hold about one third of the circumference of the corrugated synthetic resin tube in a state where the corrugated synthetic resin tube is retained inside. Moreover, the upper stage side holding part is formed with an upper stage side protrusion that can be fitted in the groove of the corrugated synthetic resin tube on the inner surface thereof.

And when stacking corrugated synthetic resin tubes in multiple stages using tube pillows, first hold the corrugated synthetic resin tubes laid on the ground with the lower-stage holding part and fit the lower-stage projections into the grooves Let Next, the upper-stage holding synthetic resin tube is held by the upper-stage holding section, and the upper-stage protrusion is fitted into the groove. Then, the corrugated synthetic resin pipe is held inside each holding portion, and the corrugated synthetic resin pipes are stacked in two stages. In this two-stage stacked state, the movement of the corrugated synthetic resin tube in the axial direction is restricted by the locking of the protrusions and the protrusions. Then, another corrugated synthetic resin tube is attached to the corrugated synthetic resin tube held in the upper stage to hold the other corrugated synthetic resin tube, whereby the corrugated synthetic resin tubes are stacked in multiple stages.
JP 2002-195458 A

  The corrugated synthetic resin pipes stacked in multiple stages by the tube pillow described in Patent Literature 1 may be subjected to external forces such as earth and sand pressure at the time of backfilling the earth and sand, and winding wrinkles of the corrugated synthetic resin pipes. In this case, for example, when an external force in the circumferential direction acts on the corrugated synthetic resin tube located at the uppermost stage, the corrugated synthetic resin tube may be twisted along the axial direction. Then, the corrugated synthetic resin pipe held by the upper stage holding part comes off from the upper stage side holding part, or a stress due to twisting always acts on the corrugated synthetic resin pipe itself. In particular, if the corrugated synthetic resin tube has a quadrangular cylindrical shape, the twisted corrugated synthetic resin tube is in an extremely unstable state, and the multi-stacked state is easily broken. For this reason, in the tube pillow of patent document 1, even if external force acted, it was necessary to be able to hold | maintain a corrugated synthetic resin tube in the stable state in each holding part.

  The present invention has been made paying attention to such problems existing in the prior art, and its purpose is to hold the corrugated tube stably in the holding portion even when an external force is applied. An object of the present invention is to provide a corrugated tube device, a corrugated tube holder constituting the corrugated tube device, and a corrugated tube.

  In order to solve the above-mentioned problems, the invention described in claim 1 includes a corrugated pipe having a cylindrical shape in which polygonal annular ridges and annular grooves are alternately formed in the axial direction, and the corrugated pipe. In the corrugated tube device constituted by the corrugated tube holder provided with a holding portion that holds along the circumferential direction, the corrugated tube includes a locking step portion on an outer surface of the corrugated tube, The corrugated tube holder includes an opening in which the corrugated tube is inserted from the radial direction in the holding portion, and a circumferential direction of the corrugated tube inserted from the opening to the inside of the holding portion. A holding surface for holding the ridge, a locking portion formed on the holding surface, inserted into the groove of the corrugated tube and locked to the ridge, and a holding portion at the holding surface. The gist of the invention is that it includes a projecting portion projecting inward and latching to the latching step portion of the corrugated tube.

The gist of the invention according to claim 2 is that, in the corrugated tube device according to claim 1, the locking step portion is formed on a protrusion of the corrugated tube.
According to a third aspect of the present invention, in the corrugated tube device according to the second aspect, the locking step portion is formed at the boundary between the recess and the protrusion by forming a recess in the protrusion. It is formed and the depth of the recess is set to be shallower than the groove.

  According to a fourth aspect of the present invention, in the corrugated pipe device according to any one of the first to third aspects, the locking step portion is a circumferential direction of the corrugated pipe with one protrusion. It is summarized that a plurality are formed along the line.

  According to a fifth aspect of the present invention, in the corrugated tube device according to the fourth aspect, the ridge is formed in a square annular shape, and the locking step portion is formed at a position facing the radial direction of the corrugated tube. It is a summary.

  The invention according to claim 6 is the corrugated tube device according to any one of claims 1 to 5, wherein the corrugated tube holder is configured such that the openings are directed to opposite sides. The gist of the present invention is that it includes a pair of holding portions.

  According to a seventh aspect of the present invention, the corrugated pipe having a cylindrical shape in which polygonal annular ridges and annular grooves are alternately formed in the axial direction is held by a holding portion along a circumferential direction thereof, and the corrugated pipe is formed. A corrugated tube holder constituting a corrugated tube device and a tube, wherein the holding portion is inserted into the inside of the holding portion from the opening portion into which the corrugated tube is inserted from the radial direction. A holding surface that holds the protrusion along the circumferential direction of the corrugated tube, and a locking portion that is formed on the holding surface and is inserted into the groove of the corrugated tube and engages with the protrusion. And a protrusion protruding toward the inside of the holding portion at the holding surface and locking to a locking step formed on the outer surface of the corrugated tube.

The invention of claim 8 is inserted into the holding portion from the opening of the corrugated tube holder, the wave with tube holder is held Hence the circumferential direction holding surface formed on the holding portion And a corrugated tube constituting a corrugated tube device, in which polygonal annular ridges and annular grooves are alternately formed in the axial direction to form a cylindrical shape, and the holding portion has an opening-side tip. The gist of the invention is that the outer surface of the protrusion is provided with a locking step portion that can lock the protrusion protruding from the holding surface toward the inside of the holding portion.

  ADVANTAGE OF THE INVENTION According to this invention, even if external force acts, the corrugated tube apparatus which can hold | maintain a corrugated tube to a holding | maintenance part in the stable state, the corrugated tube holder which comprises this corrugated tube apparatus, and corrugated A tube can be provided.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a corrugated tube device of the present invention, a corrugated tube holder constituting the corrugated tube device, and an embodiment embodying the corrugated tube will be described with reference to FIGS. In the following description, the direction in which the arrow X shown in FIG. 1 extends is the up-down direction, and the direction in which the arrow Y extends is the left-right direction.

  The corrugated tube device 11 includes a number of flexible corrugated tubes 21 (three in this embodiment), and corrugated tube holders 31 and 50 that hold the corrugated tubes 21 along the circumferential direction. It is composed of The corrugated tube device 11 is configured by corrugated tubes 21 stacked in multiple stages (three stages in the present embodiment).

  First, the corrugated tube 21 will be described. As shown in FIG. 1, the corrugated tube 21 is formed in a cylindrical shape from a synthetic resin material. In addition, the corrugated tube 21 of the present embodiment has a cross-sectional shape in a plane orthogonal to the axial direction of the corrugated tube 21 is a polygonal ring (square ring), and the cross-sectional shape is different from a circular ring shape. .

  The corrugated tube 21 is configured such that a quadrilateral annular protrusion 22 and a square annular groove 23 are alternately formed in the axial direction of the corrugated tube 21 on the outer peripheral surface thereof. The corrugated tube 21 has a wave shape in a cross-sectional view passing through the axial direction thereof, and is flexible and bendable in order to form the wave shape.

  Here, the direction orthogonal to the axial direction of the corrugated tube 21 is defined as the radial direction of the corrugated tube 21. Further, in FIG. 1, four side portions extending along the circumferential direction of each ridge 22 are arranged such that the upper side portion is the upper side portion 22a, the lower side portion is the lower side portion 22b, and the left side portion is the left side portion. The side part is the left side part 22c, and the right side part is the right side part 22d. In this case, a recess 24 is formed in each of the left side portion 22c and the right side portion 22d facing each other in the radial direction (left-right direction) among the side portions 22a to 22d of each protrusion 22. That is, the recesses 24 are formed on the left and right outer surfaces of the corrugated tube 21. Here, in each side part 22a-22d, let the direction along the circumferential direction of the corrugated tube 21 be a length direction of each side part 22a-22d. Then, each recess 24 is recessed at the center in the length direction of the left side portion 22c and the right side portion 22d. In FIG. 1, the recess 24 is recessed at the center in the vertical direction of the corrugated tube 21. Will be. A plurality of recesses 24 (the same number as the number of protrusions 22) are provided in the outer surface of the corrugated tube 21 along the axial direction of the corrugated tube 21.

  In each recess 24, the depth along the protruding direction of the protrusion 22 is set to be shallower than the depth of each groove 23. That is, each recess 24 does not reach the bottom of the groove 23, and each recess 24 is formed within the protruding length of the protrusion 22.

  At each protrusion 22 that is the outer surface of the corrugated tube 21, a locking step portion 25 is formed at the left side portion 22 c where the recess 24 is formed and the step portion that is the boundary between the right side portion 22 d and the recess 24. ing. The corrugated tube 21 is formed with a locking step portion 25 at a position opposite to the radial direction thereof.

  Next, the corrugated tube holder 31 used when connecting the two corrugated tubes 21 will be described. As shown in FIG. 2A, the corrugated tube holder 31 is formed from a synthetic resin material in an H shape in a front view, and is formed so as to hold the corrugated tube 21 on both the upper and lower sides. The corrugated tube holder 31 includes a connecting portion 30 having a plate shape at the center. The corrugated tube holder 31 includes a holding portion 32 for holding the corrugated tube 21 along the circumferential direction on the upper side with the connecting portion 30 as a boundary, and the corrugated portion on the lower side with the connecting portion 30 as a boundary. A holding portion 42 that holds the tube 21 along its circumferential direction is provided (see FIG. 1). In the following description, for ease of explanation, the upper holding portion of the connecting portion 30 is referred to as an upper holding portion 32, and the lower holding portion of the connecting portion 30 is referred to as a lower holding portion 42. Moreover, although the upper side holding | maintenance part 32 and the lower side holding | maintenance part 42 are the same structures, in order to make description easy to understand, the different member number is attached | subjected.

  The upper holding portion 32 is configured to hold the lower half of the corrugated tube 21, that is, the lower side of the recess 24, and the lower holding portion 42 is disposed above the corrugated tube 21. It is set as the structure which hold | maintains half, ie, the upper side from the recess 24 (refer FIG. 1). The upper and lower holding portions 32 and 42 include a pair of opposing holding pieces (hereinafter referred to as an upper holding piece 33 and a lower holding piece 43) 33 and 43 extending from the connecting portion 30. The lower holding part 42 is formed in a reverse U shape in front view.

  Further, the corrugated tube 21 is inserted into the upper and lower holding portions 32 and 42 from the radial direction between the pair of upper and lower holding pieces 33 and 43 and can be taken out from the radial direction. Openings (hereinafter referred to as an upper opening 34 and a lower opening 44) 34, 44 are formed. A holding surface (hereinafter, referred to as a lower holding surface 42 a) 42 a that is an inner surface of the lower holding portion 42 includes a lower surface 30 b of the connecting portion 30 and inner surfaces 43 a of both lower holding pieces 43.

  The lower holding surface 42 a is formed so as to be perpendicular to the lower surface 30 b after extending in an arc shape from both sides of the lower surface 30 b of the connecting portion 30 toward the tip of each lower holding piece 43. A front view shape of the lower holding surface 42a is the same as the front view shape of the outer half of the corrugated tube 21 and the upper half of the recess 24 (see FIG. 4). When the corrugated tube 21 is inserted from the lower opening 44 into the lower holding portion 42 along the radial direction, the lower holding surface 42 a is the outer surface of the corrugated tube 21 and is the recess 24. It is comprised so that the outer surface of upper half may be held.

  That is, the lower holding surface 42a is formed by the upper side portion 22a, the left side portion 22c, and the right side portion 22d of the plurality of (three in this embodiment) ridges 22 constituting the upper half of the corrugated tube 21. It is comprised so that it may be arrange | positioned along an outer surface. At this time, the lower holding portion 42 is configured to be along the upper side of the three protrusions 22 that are continuous along the axial direction of the corrugated tube 21.

On the other hand, a holding surface (hereinafter referred to as an upper holding surface 32 a) 32 a that is an inner surface of the upper holding portion 32 is constituted by an upper surface 30 a of the connecting portion 30 and inner surfaces 33 a of both upper holding pieces 33.
The upper holding surface 32a is formed so as to be perpendicular to the upper surface 30a after extending in an arc shape from both sides of the upper surface 30a of the connecting portion 30 toward the tip of each upper holding piece 33. The front view shape of the upper holding surface 32a is formed in the same shape as the front view shape of the lower half from the recess 24 of the corrugated tube 21 (see FIG. 4). When the corrugated tube 21 is inserted from the upper opening 34 into the upper opening 34 along the radial direction, the upper holding surface 32 a is the outer surface of the corrugated tube 21 and is more than the recess 24. It is configured to hold the outer surface of the lower half.

  That is, the upper holding surface 32a includes the lower side 22b, the left side 22c, and the right side 22d of the plurality of (three in this embodiment) ridges 22 constituting the lower half of the corrugated tube 21. It is comprised so that it may be arrange | positioned along the outer surface. At this time, the upper holding part 32 is configured to be along the upper side of the three protrusions 22 that are continuous along the axial direction of the corrugated tube 21.

  Further, upper and lower protrusions 35 and 45 as protrusions protrude from the positions of the upper and lower holding surfaces 32a and 42a, which are the tips of the upper and lower holding pieces 33 and 43, respectively. ing. The upper and lower protrusions 35 and 45 protrude toward the inside of the upper and lower holding parts 32 and 42, respectively. Further, the upper and lower protrusions 35 and 45 are formed to extend in a direction intersecting with the attaching / detaching direction (vertical direction) of the corrugated tube 21 with respect to the upper and lower openings 34 and 44. . On the other hand, the locking step portion 25 in the corrugated tube 21 is formed so as to extend in a direction intersecting the attaching / detaching direction of the corrugated tube 21 with respect to the upper and lower openings 34 and 44, respectively. Therefore, the upper and lower protrusions 35 and 45 are configured to be locked to the adjacent three locking step portions 25 when the corrugated tube 21 is held by the upper and lower holding portions 32 and 42. (See FIG. 1).

  As shown in FIG. 2B, the upper and lower holding surfaces 32a and 42a are provided with locking ridges (hereinafter referred to as an upper locking ridge 36 and a lower locking ridge 46) as locking portions. ) 36 and 46 are formed. The upper and lower locking protrusions 36 and 46 are formed in an elongated plate shape extending from the connecting portion 30 to the inner surfaces 33a and 43a of the upper and lower holding pieces 33 and 43. Both ends of the upper and lower locking projections 36 and 46 do not reach the tips of the upper and lower holding pieces 33 and 43. When the upper and lower retaining protrusions 36 and 46 hold the corrugated tube 21 in the upper and lower holding portions 32 and 42, the upper and lower engaging protrusions 36 and 46 enter the groove 23 of the corrugated tube 21, and It can be locked to either one of the adjacent protrusions 22 to be formed (see FIG. 4).

  2 (a), the corrugated tube holder 31 having the above-described configuration is deformed by bending the distal end side of the upper holding pieces 33 toward the inner side of the upper holding portion 32. The front end side of the side holding piece 43 is bent and deformed to the outside of the lower holding portion 42. That is, the opening width of the lower opening 44 that is the interval between the lower holding pieces 43 can be increased.

  Next, the corrugated tube holder 50 used when fixing the corrugated tube 21 on the installation surface (the ground in this embodiment) will be described. As shown in FIG. 3, the corrugated tube holder 50 includes a plate-shaped portion 51 having a rectangular plate shape and a retaining portion (hereinafter referred to as a tube retaining portion 52) 52 that retains the corrugated tube 21. ing. Insertion holes 51 a through which the fixing pins P can be inserted are formed on both sides of the plate-like portion 51 in the long side direction.

  The tube holding portion 52 includes a pair of holding pieces 53 facing each other, and is formed in an inverted U shape when viewed from the front. An opening 54 is formed between the pair of holding pieces 53 so that the corrugated tube 21 can be inserted into the tube holding portion 52 from the radial direction and can be taken out. Further, the holding surface 52 a which is the inner surface of the tube holding portion 52 is composed of an upper surface 51 b of the plate-like portion 51 and inner surfaces 53 a of both holding pieces 53. The holding surface 52a is formed in the same shape as the upper holding surface 32a of the corrugated tube holder 31, and when the corrugated tube 21 is inserted from the radial direction inside the tube holding portion 52, the holding surface 52a is held. The holding surface 52a is configured to hold the outer surface of the corrugated tube 21 and the lower half of the recess 24 (see FIG. 1).

  That is, the holding surface 52a includes the lower side portion 22b, the left side portion 22c, and the right side portion 22d of the plurality of (three in this embodiment) ridges 22 constituting the lower half of the corrugated tube 21. It is comprised so that it may be arrange | positioned along an outer surface. At this time, the tube holding portion 52 is configured to be along the upper side of the three protrusions 22 that are continuous along the axial direction of the corrugated tube 21.

  Further, a protrusion 55 projects toward the inside of the tube holding portion 52 at a position on the holding surface 52 a that is the tip of each holding piece 53. This protrusion 55 is formed in the same shape as the upper protrusion 35 of the corrugated tube holder 31, and when the corrugated tube 21 is held by the tube holding portion 52, the three adjacent locking step portions 25. It is set as the structure latched to. Further, a locking ridge 56 as a locking portion is formed on the holding surface 52 a, and the locking ridge 56 is formed in the same shape as the upper locking ridge 36 of the corrugated tube holder 31. . Then, when the corrugated tube 21 is held by the tube holding portion 52, the locking protrusion 56 enters either the groove 23 of the corrugated tube 21, and is one of the adjacent protrusions 22 that form the groove 23. It can be locked to one side.

  Next, as shown in FIGS. 1, 4, and 5, a corrugated pipe device 11 in which three corrugated pipes 21 are stacked in multiple stages will be described. First, the fixing pin P is inserted into the insertion hole 51a of the first corrugated tube holder 50, the fixing pin P is fixed to the installation surface, and the first corrugated tube holder 50 is fixed to the installation surface. To do. Next, the corrugated tube 21 is inserted into the opening 54 of the corrugated tube holder 50, and the lower side of the corrugated tube 21 is held inside the tube holding portion 52. Then, the corrugated tube 21 is laid on the installation surface. At this time, the tip of the tube holding portion 52 of the first corrugated tube holder 50 reaches the upper side of the intermediate position in the vertical direction of the retained corrugated tube 21. The corrugated tube 21 laid on the installation surface by the first corrugated tube holder 50 is referred to as a first-stage corrugated tube 21.

  Next, the lower holding portion 42 of the second corrugated tube holder 31 is mounted on the upper side of the first-stage corrugated tube 21, and the corrugated tube 21 is held by the lower holding portion 42. At this time, if the second corrugated tube holder 31 is to be mounted on the first corrugated tube 21 at the same position as the first corrugated tube holder 50, The leading end and the leading end of the lower holding portion 42 interfere with each other, and the second corrugated tube holder 31 cannot be attached to the corrugated tube 21. For this reason, the 2nd corrugated tube holder 31 is mounted | worn in the position shifted along the axial direction of the corrugated tube 21 rather than the 1st corrugated tube holder 50 (refer FIG. 1).

  Next, another corrugated tube 21 is attached to the upper holding portion 32 of the second corrugated tube holder 31, and another corrugated tube 21 is held inside the upper holding portion 32, so that the first stage Another corrugated tube 21 is laid on the upper side of the corrugated tube 21. The corrugated tube 21 held above the first-stage corrugated tube 21 by the second corrugated tube holder 31 is referred to as a second-stage corrugated tube 21. At this time, the tip of the upper holding portion 32 of the second corrugated tube holder 31 reaches the upper side of the intermediate position in the vertical direction of the held second-stage corrugated tube 21.

  Next, the lower holding portion 42 of the third corrugated tube holder 31 is mounted on the upper side of the second-stage corrugated tube 21, and another corrugated tube 21 is held inside the holding portion 42. At the same time, the third corrugated tube holder 31 is attached to the corrugated tube 21 at the second stage. At this time, if the third corrugated tube holder 31 is to be attached to the second corrugated tube 21 at the same position as the second corrugated tube holder 31, The tip and the tip of the lower holding portion 42 interfere with each other, and the third corrugated tube holder 31 cannot be attached to the corrugated tube 21. For this reason, the third corrugated tube holder 31 is mounted at a position displaced in the axial direction of the corrugated tube 21 relative to the second corrugated tube holder 31 (see FIG. 1). .

  Next, another corrugated tube 21 is attached to the upper holding portion 32 of the third corrugated tube holder 31, and another corrugated tube 21 is held inside the upper holding portion 32, so that the second stage The corrugated tube 21 is laid on the upper side of the corrugated tube 21. The corrugated tube 21 held above the second-stage corrugated tube 21 by the third corrugated tube holder 31 is referred to as a third-stage corrugated tube 21. As a result, the three corrugated tube holders 31 and 50 are used to lay the three corrugated tubes 21 on the installation surface in a state where they are stacked in three stages, The corrugated tube device 11 is composed of the three corrugated tubes 21.

  In a state where the three corrugated tubes 21 are stacked in multiple stages, as shown in FIGS. 1 and 4, the lower side of the corrugated tube 21 is held by the tube holding portion 52 or the upper holding portion 32. In this holding state, the front view shape of the holding surface 52a or the upper holding surface 32a is the same shape as the lower side view shape of each corrugated tube 21. For this reason, the holding surface 52a or the upper holding surface 32a has three side surfaces along the circumferential direction of each corrugated tube 21, that is, the lower side portion 22b, the left side portion 22c, and the right side portion of the ridge 22. 22d. For this reason, even if an external force acts on each corrugated tube 21, each corrugated tube 21 has its three side portions 22b, 22c, 22d in contact with the holding surface 52a or the upper holding surface 32a. The holding portion 52 or the upper holding portion 32 is restricted from rotating in the circumferential direction.

  Further, the protrusion 55 or the upper protrusion 35 is locked to the locking step portion 25 of the corrugated tube 21 from above, and the corrugated tube 21 is prevented from coming off in the tube holding portion 52 or the upper holding portion 32. Yes. For this reason, the locking of the protrusion 55 or the upper protrusion 35 and the locking step portion 25 restricts the corrugated tube 21 from rotating in the circumferential direction by the tube holding portion 52 or the holding portion 32, and The corrugated tube 21 is restricted from coming out of the tube holding portion 52 or the upper holding portion 32 upward. As a result, each corrugated tube 21 is strongly held in a stable state by the tube holding portion 52 or the upper holding portion 32. For this reason, even if an external force acts on the corrugated tube 21, the corrugated tube 21 is prevented from rotating in the circumferential direction or from being detached from the tube holding portion 52 or the upper holding portion 32.

  Further, as shown in the broken line in FIG. 4 and FIG. 5, when the corrugated tube 21 is held by the tube holding portion 52, the upper holding portion 32, or the lower holding portion 42, the locking protrusion 56, the upper locking protrusion The strip 36 or the lower locking projection 46 enters the groove 23 of the corrugated tube 21. For this reason, even if the external force moved to an axial direction acts on each corrugated tube 21, the protrusion 22 latches to each latching protrusion 36,46,56. As a result, the movement of the corrugated tube 21 in the axial direction is restricted.

  In each corrugated tube holder 31, the lower holding portion 42 is mounted on the upper side of the corrugated tube 21. In this state, the lower holding surface 42a is disposed along the upper side portion 22a, the left side portion 22c, and the right side portion 22d of each corrugated tube 21. For this reason, even if an external force is applied to each corrugated tube holder 31, each corrugated tube holder 31 has its lower holding surface 42 a in contact with the outer surface of the corrugated tube 21. The rotation of 31 along the circumferential direction of the corrugated tube 21 is restricted.

  Further, the lower protrusion 45 of the lower holding portion 42 is locked to the locking step portion 25 of the corrugated tube 21. For this reason, the corrugated tube holder 31 is restricted from coming off the corrugated tube 21. In addition, the lower locking protrusion 46 enters the groove 23 of the corrugated tube 21. For this reason, even if the external force moved to an axial direction acts on each corrugated tube 21, the protrusion 22 latches to the lower latching protrusion 46. FIG. As a result, the corrugated tube holder 31 is restricted from rotating above the corrugated tube 21 in the circumferential direction, coming out upward, and moving in the axial direction. Therefore, the state where each corrugated tube holder 31 is attached to the corrugated tube 21 is maintained, and the multi-stage stacked state of the corrugated tube device 11 is maintained.

According to the above embodiment, the following effects can be obtained.
(1) The corrugated tube device 11 is configured by stacking three corrugated tubes 21 using the corrugated tube holders 31 and 50 in three stages. At this time, the holding surface 52a or the upper holding surface 32a has three side surfaces along the circumferential direction of each corrugated tube 21 (the protrusion 22), that is, the lower side 22b and the left side 22c of the protrusion 22. And along the right side portion 22d. Further, the protrusion 55 or the upper protrusion 35 is locked to the locking step portion 25 of the corrugated tube 21, and the corrugated tube 21 is prevented from coming off inside the tube holding portion 52 or the upper holding portion 32. For this reason, even if an external force is applied to each corrugated tube 21, the corrugated tube 21 is restricted from rotating and twisting in the circumferential direction or coming off the tube holding portion 52 or the upper holding portion 32. As a result, even if an external force is applied to the corrugated tube 21, the corrugated tube 21 can be stably held in the tube holding portion 52 or the upper holding portion 32, and the corrugated tube device 11 is in a multi-stage stacked state. Can be made stable. Further, in the corrugated tube 21 in which the protrusions 22 are formed in a square ring shape, if the ridges 22 are twisted in the circumferential direction, the multi-stage stacked state becomes very unstable and may be easily broken. By using the corrugated tube holders 31 and 50, the corrugated tube 21 can be held in a stable state by restricting the occurrence of the twist of the corrugated tube 21 itself.

  (2) When the corrugated tube 21 is held by the corrugated tube holders 31, 50, the locking protrusions 36, 46, 56 enter the groove 23 of the corrugated tube 21. For this reason, even if the external force moved to an axial direction acts on each corrugated tube 21, the protrusion 22 latches to each latching protrusion 36,46,56. As a result, the corrugated tube 21 can be prevented from moving in the axial direction, and the corrugated tube holders 31 and 50 can hold the corrugated tube 21 in a stable state.

  (3) By using the corrugated tube holder 31, the two corrugated tubes 21 can be connected. For this reason, the converging work of the corrugated tube 21 can be facilitated, and the stacked corrugated tube 21 can be made difficult to collapse.

  (4) When the corrugated tube 21 is held by the tube holding portion 52 or the upper holding portion 32, the protrusion 55 or the upper protrusion 35 is locked to the locking step portion 25 of the corrugated tube 21. The upper tube 21 is prevented from coming out upward and the rotation in the circumferential direction is also restricted. That is, the upper protrusion 35 or the protrusion 55 serves as both means for holding the corrugated tube 21 in the tube holding portion 52 or the upper holding portion 32 and holding it. Therefore, the configuration of the corrugated tube holders 31 and 50 can be simplified as compared with the case where the retaining means and the retaining means for the corrugated tube 21 are provided separately.

  (5) In a state in which the corrugated tube 21 is held by the tube holding portion 52 or the upper holding portion 32, the tip of the tube holding portion 52 and the tip of the upper holding portion 32 are more than the intermediate position in the vertical direction of each corrugated tube 21. It has reached the upper side. For this reason, when another corrugated tube holder 31 is to be mounted on the upper side of the corrugated tube holders 31 and 50 in each corrugated tube 21, the tip of the tube holding portion 52 or the tip of the upper holding portion 32 is The front ends of the lower holding portions 42 interfere with each other, and the lower protrusion 45 of the lower holding portion 42 cannot be locked to the locking step portion 25. As a result, the corrugated tube holder 31 is not attached to the upper side of the corrugated tube 21 in an unstable state, and the multi-stage stacked state of the corrugated tube 21 becomes stable.

  (6) In the corrugated tube 21, the recess 24 is recessed in the protrusion 22, and the recess is not recessed in the groove 23. For this reason, for example, the recess is formed up to the groove 23, and the bending does not prevent the bending of the corrugated tube 21 from the groove 23, and the corrugated tube 21 can be easily bent and laid. .

  (7) Each recess 24 of the corrugated tube 21 does not reach the bottom of the groove 23. For this reason, for example, when the end portions of the corrugated pipe 21 are connected to each other by a connector (not shown), a packing made of a rubber material for preventing intrusion of earth and sand into the gap between the end portions is a corrugated pipe. Suppose that it entered into the groove 23 located at the end of 21. At this time, since the recess 24 is not recessed until it reaches the groove 23, the packing can be brought into contact with the protrusion 22. As a result, for example, the recess 24 is recessed until it reaches the groove 23, and there is no contact surface of the packing so that the packing is not deformed, and it is possible to reliably prevent the intrusion of earth and sand by the packing.

  (8) The corrugated tube holder 31 can bend and deform the lower holding portion 42 outward when the upper holding portion 32 is bent and deformed inward. For this reason, when removing the corrugated tube holder 31 mounted on the upper side of the corrugated tube 21, the corrugated tube holder 31 can be removed from the corrugated tube 21 simply by bending and deforming the pair of upper retaining portions 32. it can. In particular, when the corrugated tubes 21 are arranged side by side, a hand is inserted between the adjacent corrugated tubes 21 to release the locking between the lower protrusion 45 and the locking step portion 25. In comparison, the corrugated tube holder 31 can be easily removed.

  (9) In each protrusion 22, a plurality of recesses 24 (locking step portions 25) are formed in the circumferential direction of the corrugated tube 21 (two in this embodiment). For this reason, the upper side protrusion 35, the lower side protrusion 45, or the protrusion 55 can be latched in two places of the corrugated pipe 21, and the holding | maintenance and removal prevention of the corrugated pipe 21 are ensured.

  (10) In the corrugated tube 21, the recess 24 (the locking step portion 25) is recessed in all the protrusions 22 along the axial direction of the corrugated tube 21. For this reason, in this embodiment, the upper protrusion 35, the lower protrusion 45, or the protrusion 55 can be locked to a plurality of (three in this embodiment) locking step portions 25, and the corrugated tube 21 Can be securely held and retained.

  (11) The corrugated tube holder 31 includes a pair of upper and lower holding portions 32 and 42. For this reason, two corrugated pipes 21 can be connected by one corrugated pipe holder 31. Therefore, when performing a multi-stage stacking operation of the corrugated pipe 21, the corrugated pipe 21 can be easily and accurately laid on the lower corrugated pipe 21, and the multi-stage stacking operation of the corrugated pipe 21 is easy. It becomes.

In addition, you may change the said embodiment as follows.
As shown in FIG. 6, the corrugated tube 21 may have a recess formed in the groove 23.
The corrugated tube 21 may be formed in a horizontally long rectangular tube shape, and the recess 24 may be formed on a pair of opposing short sides.

  The corrugated tube 21 is formed in a pentagonal or hexagonal shape in which the protrusions 22 and grooves 23 form a pentagonal or hexagonal ring, and the holding portions 32, 42, 52 of the corrugated tube holders 31, 50 are You may form so that each holding surface 32a, 42a, 52a may hold along the circumferential direction of the corrugated tube 21. FIG.

The corrugated tube 21 may be formed in a cylindrical shape in which the protrusions 22 form a quadrangular ring and the grooves 23 form an annular shape.
A recess 24 may be provided in the center of the four side surfaces of the ridge 22 of the corrugated tube 21.

-A pair of protrusion part may be formed in the outer surface of the protrusion 22, and a recess may be formed inside these protrusion parts. At this time, each protrusion becomes a locking step.
-It is good also as a shape which does not form a latching | locking part in the shape of an elongate plate like each latching protrusion 36,46,56, but protrudes in columnar shape.

The perspective view which shows the corrugated tube apparatus of embodiment. (A) is a front view which shows a corrugated pipe holder, (b) is sectional drawing which shows a corrugated pipe holder. The perspective view which shows a corrugated tube holder. The front view which shows a corrugated tube apparatus. FIG. 5 is a sectional view taken along line 5-5 in FIG. 4 showing a part of the corrugated tube device. The perspective view which shows the corrugated pipe | tube of another example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Corrugated pipe apparatus, 21 ... Corrugated pipe, 22 ... Projection, 23 ... Groove, 24 ... Recess, 25 ... Locking step part, 23 ... Groove, 31, 50 ... Corrugated pipe holder, 32 ... Upper holding part as a holding part, 32a ... Upper holding face as holding face, 34 ... Upper opening part as opening, 35 ... Upper protruding part as protrusion, 36 ... Upper locking as locking part Ridge, 42 ... lower holding part as holding part, 42a ... lower holding face as holding face, 44 ... lower opening part as opening part, 45 ... lower protrusion part as protruding part, 46 ... Lower locking ridges as locking parts, 52 ... Pipe holding parts as holding parts, 52a ... Holding surfaces, 54 ... Opening parts, 55 ... Projections, 56 ... Locking ridges as locking parts .

Claims (8)

A corrugated tube holder having a tubular corrugated tube in which polygonal annular ridges and annular grooves are alternately formed in the axial direction, and a holding portion for retaining the corrugated tube along its circumferential direction. In the corrugated pipe device composed of
The corrugated tube has a locking step on the outer surface of the corrugated tube,
The corrugated tube holder is provided along the circumferential direction of the corrugated tube that is inserted into the retaining portion from the radial direction of the corrugated tube and inside the retaining portion from the opening portion. A holding surface for holding the ridge, a locking portion formed on the holding surface, inserted into the groove of the corrugated tube and locked to the ridge, and a holding portion on the holding surface A corrugated pipe device comprising: a projecting portion projecting toward the inside of the corrugated tube, and a projecting portion engaging with an engaging step portion of the corrugated tube. The corrugated tube device according to claim 1, wherein the locking step portion is formed on a protrusion of the corrugated tube. The locking step is formed at the boundary between the recess and the protrusion by forming a recess in the protrusion, and the depth of the recess is set shallower than the groove. The corrugated tube device according to claim 2. The corrugated tube device according to any one of claims 1 to 3, wherein a plurality of the locking step portions are formed along the circumferential direction of the corrugated tube by one protrusion. The corrugated tube device according to claim 4, wherein the protrusion is formed in a quadrangular annular shape, and the locking step is formed at a position facing the radial direction of the corrugated tube. The corrugated tube device according to any one of claims 1 to 5, wherein the corrugated tube holder includes a pair of retaining portions in which the opening portions open toward opposite sides. The corrugated tube and the corrugated tube device are configured by holding a tubular corrugated tube in which polygonal annular ridges and annular grooves are alternately formed in the axial direction by a holding unit along its circumferential direction. A corrugated tube holder,
The holding portion holds the protrusion along the circumferential direction of the opening portion into which the corrugated tube is inserted from the radial direction and the inside of the holding portion from the opening portion. A holding surface; a locking portion formed on the holding surface; inserted into the groove of the corrugated tube and locked to the ridge; and protruding toward the inside of the holding portion on the holding surface. A corrugated tube holder, comprising: a projection that is engaged with an engaging step formed on an outer surface of the corrugated tube. Wave is inserted into the holding portion from the opening of the corrugated tube holder, constituting the tube with attached tube holder and the corrugated wave device held in the holding surface formed on the holding portion Thus the circumferential direction A tube,
Polygonal annular ridges and annular grooves are alternately formed in the axial direction to form a cylindrical shape, and project from the holding surface toward the inside of the holding portion at the opening side tip of the holding portion. A corrugated tube comprising a locking step that can lock the protrusion on the outer surface of the protrusion .

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