JP2006083565A - Joint for culvert pipes - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint for culvert pipes, which facilitates connection between the culvert pipes when the culvert pipes each formed of a water permeable perforated pipe or the like, are embedded in the ground to construct a draining culvert or an irrigation culvert, and dispenses with large excavation around a connection portion between the culvert pipes. <P>SOLUTION: The joint 11 for the culvert pipes is formed of an elastically deformable material, and has suckets 13 to which the culvert pipes 16 to be embedded in the ground are connected. The joint has a cutout portion 14 formed in a proximal area of each suckets 13 thereof over half a circumference, and has a slit 15 formed therein so as to extend between each cutout portion 14 and each sucket opening edge 13a in a sucket axial direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a culvert pipe joint, and more particularly, to a culvert pipe joint used when connecting a culvert pipe embedded in a ground such as a wetland or a farm field.

Conventionally, culvert pipes (perforated pipes, culvert drain pipes) for drainage culverts have been laid in poorly drained land to improve drainage, or culvert pipes have been buried in the field for irrigation. It is being used. The culvert pipe is buried in advance by excavating and forming a groove (tube burying groove) for burying the culvert pipe using a backhoe or a trencher, and the culvert pipe is laid in the pipe burying groove. At this time, since the pipe joint generally used is conventionally used for the connection between the culvert pipes and the branch part of the culvert pipe, an operation of inserting the end of the culvert pipe into the receiving port is performed. Space was required, and the pipe connection part was greatly cut open. Further, as a joint (cheese or cloth) used for a branch portion of a culvert tube, a combination of a pair of half-tubular joint halves has been proposed (for example, see Patent Document 1).
JP 2001-355225 A

  However, although the joint described in Patent Document 1 has the advantage that the branch pipe can be connected to the main pipe at an arbitrary position, the number of parts is large, and the pair of joint halves are fixed with bolts and nuts. The work is cumbersome and the cost is increased. Also, when connecting a branch pipe using this joint, it is necessary to greatly cut the periphery. A saddle joint is known as a joint for connecting a branch pipe to the main pipe. However, it is necessary to fix the saddle in a state where the opening formed in the peripheral wall of the main pipe and the joint pipe are matched. The surrounding area had to be greatly excavated for alignment and fixing work.

  Therefore, the present invention can easily connect the underdrain pipe when constructing drainage underdrains or irrigation underdrains using underdrain pipes made of perforated pipes or the like having water permeability, and greatly cuts the periphery of the connecting portion. An object of the present invention is to provide a culvert pipe joint that is not necessary.

  In order to achieve the above object, a joint for a culvert tube according to the present invention is a joint made of an elastically deformable material having a receiving port for connecting a culvert tube embedded in the ground, and a base portion of the receiving port In addition, a notch part corresponding to a half circumference in the circumferential direction is provided, and a slit in the receiving shaft direction is provided between the notch part and the receiving opening end.

  Further, the undercarriage joint according to the present invention is made of an elastically deformable material, and includes a cover member having a C-shaped cross section having an inner diameter corresponding to the outer diameter of the receiving port and a length corresponding to the length of the receiving port. It is characterized in that it is mounted on the outer periphery of the receiving port to which the end portion of the culvert tube is connected, and the slit is covered with the cover material.

  According to the joint for a culvert pipe of the present invention, by pushing the joint with the slit provided in the socket facing the culvert pipe, or by pushing the culvert pipe toward the slit, from the notch of the socket When the distal end side is elastically deformed and the slit is opened, and when the culvert tube enters further into the receiving port, the receiving port returns to its original shape, and the end portion of the culvert tube is wrapped and held. Therefore, by providing all the notches and slits of the plurality of receiving ports formed in the joint in the same direction, the end portions of the plurality of culvert pipes are arranged at predetermined positions and the joint is moved from one side. A plurality of culvert tubes can be connected simply by pressing. In addition, since it is not necessary to precisely position and fix the joint when connecting, it is not necessary to greatly cut the periphery. Moreover, the connection intensity | strength with a culvert tube can be improved by covering a slit part with a cover material.

  FIG. 1 thru | or FIG. 5 shows the 1st example of this invention, and has shown the basic shape of the joint for culvert pipes. 1 is a perspective view showing a state before connection, FIG. 2 is a partially cutaway front view, FIG. 3 is a sectional view taken along line III-III in FIG. 2, FIG. 4 is a sectional view showing a state during connection, and FIG. It is a perspective view which shows a back state.

  First, the culvert pipe joint 11 is formed of a joint body 12 made of a straight pipe and receiving ports 13 and 13 provided on both sides of the joint body 12. The base portion of the receiving port 13 is provided with a cut portion 14 corresponding to a half circumference in the circumferential direction, and a slit 15 in the receiving shaft direction is provided between the cut portion 14 and the receiving port opening end 13a. Yes. The slit 15 is provided in a state of being continuous with the middle portion in the circumferential direction of the cut portion 14, and when the slit 15 is widened, the receiving blades 13 b and 13 b ahead of the cut portion 14 are elastically deformed to form both sides. It is formed to open.

  When connecting the culvert tube 16 using the culvert tube joint 11 formed in this way, the portion of the slit 15 is pressed against the outer peripheral surface of the end of the culvert tube 16 with the tube end 16a disposed at a predetermined position. . At this time, if the gap between the slits 15 is appropriately set according to the curvature of the outer peripheral surface of the culvert tube 16, and the culvert tube joint 11 is further pressed against the culvert tube 16, as shown in FIG. The receiving blades 13 b and 13 b are elastically deformed to expand the slit 15, and the culvert tube 16 enters the receiving port 13. When the culvert tube 16 is housed in the receiving port 13, the receiving port wing portions 13 b and 13 b are restored to their original shapes due to their elasticity, and the culvert tube 16 is inserted into the receiving port 13. In other words, the culvert tube 16 can be connected to the culvert tube joint 11 by simply pressing the culvert tube joint 11 from the direction perpendicular to the axis line with the slit 15 corresponding to the culvert tube 16.

  Therefore, it is possible to connect the undercarriage pipe 16 by simply pressing the undercarriage pipe joint 11 from above toward the undercarriage pipe 16 laid at the bottom of the pipe burying groove, and it is not necessary to greatly cut the joint connecting portion. The laying operation of the pipe 16 can be simplified. As a result, it is possible to significantly reduce the cost of pipe laying work in underdrainage and underdrain irrigation that do not require strict watertightness for pipe connection.

  The undercarriage pipe joint 11 can be applied not only to the connection between the undercarriage pipes 16 having the water passage holes 16b but also to the connection of ordinary pipe materials, and also to the connection of undercarriage pipes having different diameters. The present invention can be applied by making the diameters of the receiving ports 13 correspond to each other. In addition, the cut portion 14 is usually sufficient for a half circumference in the circumferential direction of the receiving port 13, but may be formed to exceed the half circumference depending on the state of elastic deformation of the receiving blades 13 b and 13 b. Good.

  In ordinary culvert tube connection work, it is sufficient to connect the culvert tube 16 with the culvert tube joint 11 as described above, but by attaching the cover material 17 to the outer periphery of the receiving port 13 after the culvert tube connection. The connection strength between the receiving port 13 and the culvert tube 16 can be improved. The cover member 17 is formed of the same elastically deformable material as the culvert tube joint 11 so as to have a C-shaped cross section in which an axial opening 18 is provided in a part of the cylindrical body. The inner diameter of the cover member 17 corresponds to the outer diameter of the receiving port 13, and the length is set to a length corresponding to the length of the receiving port 13.

  The cover material 17 formed in this manner is in a state where the entire cover material 17 is elastically deformed and the opening 18 is expanded by pressing the opening 18 against the outer peripheral surface of the receiving port 13. Similar to the connection with the receiving port 13, the cover material 17 can be attached to the outer periphery of the receiving port 13 simply by pressing the cover material 17 against the outer periphery of the receiving port 13.

  Furthermore, the position of the opening 18 of the cover material 17 is different from the position of the slit 15, and the slit 15 is covered with the cover material 17 to prevent the slit 15 from expanding even when an external force is applied in the direction in which the slit 15 expands. Thus, the connection state of the culvert tube 16 can be reliably maintained. In particular, by setting the inner diameter of the cover material 17 before elastic deformation to be smaller than the outer diameter of the receiving port 13, the receiving port 13 can be tightened by the cover material 17. Can be reliably prevented. In addition, the length of the cover material 17 may be shorter or longer than the length of the receiving port 13 as long as the opening of the slit 15 can be prevented. The wall thickness of the receiving port 13 and the cover material 17 may be set in consideration of conditions such as the material, the diameter, and the amount of elastic deformation.

  FIG.6 and FIG.7 shows the 2nd example of this invention, and has shown the example which applied the joint for culvert pipes to cheese. 6 is a perspective view showing a state before connection, and FIG. 7 is a perspective view showing a state after connection. In the following description, the same components as those in the joint for a culvert tube shown in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The undercarriage pipe joint (cheese) 21 shown in the present embodiment is provided at a position where the undercarriage branch pipe 23 branches from the undercarriage main pipe 22 to the side, and a pair of main pipe side receptacles for connecting the undercarriage main pipes 22, 22. 24 and a branch pipe side receiving port 25 for connecting the underdrain branch pipe 23. In the main pipe side receiving port 24 and the branch pipe side receiving port 25, similarly to the receiving port 13 shown in the first embodiment, a cut portion 14 corresponding to a half circumference in the circumferential direction of the receiving port base portion, and the cut portion 14. And a slit 15 in the receiving shaft direction between the opening opening and the receiving opening end.

  Also in the undercarriage pipe joint 21 shown in the present embodiment, a pair of undercarriage main pipes 22 and 22 and undercarriage branch pipes 23 cut to a predetermined length are respectively arranged at the bottom of the pipe embedding groove, and then slits of the receiving ports 24 and 25 are made. The culvert main pipes 22 and 22 and the culvert branch pipe 23 can be connected via the culvert pipe joint 21 by pressing 15 to the outer peripheral surfaces of the pipes 22 and 23. Furthermore, the connection strength with each pipe | tube can be improved by attaching the cover material 17 to each receiving port 24,25 after pipe | tube connection, and covering the slit 15. FIG.

  8 to 10 show a third embodiment of the present invention, and show a construction example when the undercarriage pipe joint is applied to a cloth. 8 is a bottom view of the joint for a culvert pipe, FIG. 9 is a plan view showing a state where the culvert main pipe and the culvert branch pipe are laid in the pipe burying groove, and FIG. 10 is a cross-sectional front view showing the state at the time of connection.

  The undercarriage pipe joint (cross) 31 shown in this embodiment is provided at a position where the undercarriage branch pipes 33 and 33 are branched from the undercarriage main pipe 32 on both sides, and a pair of main pipe sides for connecting the undercarriage main pipes 32 and 32 is provided. Receiving ports 34, 34 and a pair of branch pipe side receiving ports 35, 35 for connecting the underdrain supporting tubes 33, 33 are provided. In the main pipe side receiving port 34 and the branch pipe side receiving port 35, similarly to the receiving port 13 shown in the first embodiment, a cut portion 14 corresponding to a half circumference in the circumferential direction of the receiving port base portion, and the cut portion 14. And a slit 15 in the receiving shaft direction between the opening opening and the receiving opening end.

  As shown in FIG. 9, the connecting operation of the culvert main pipe 32 and the culvert branch pipe 33 is first performed by excavating a main pipe burial groove 36 for laying the culvert main pipe 32 and a branch pipe burying groove 37 for laying the culvert branch pipe 33. At the same time, the culvert main pipe 32 and the culvert branch pipe 33 are laid in the pipe burying grooves 36 and 37. At this time, as shown in FIG. 9, the culvert branch pipe 33 may be laid so as to pass over one culvert pipe, for example, the culvert main pipe 32, or one culvert pipe, for example, the culvert main pipe 32 is laid. You may make it arrange | position the culvert branch pipe 33 cut | disconnected to predetermined length later on the both sides of the culvert main pipe 32. FIG.

  Next, after the end portions of the culvert main pipe 32 and the culvert branch pipe 33 are cut at predetermined cutting positions 38, respectively, as shown in FIG. 10, the culvert pipe joint 31 is inserted into the embedded groove from above the groove, and the main pipe side By pressing the slit 15 of the receiving port 34 against the outer peripheral surface of the end portion of the culvert main pipe 32 and the slit 15 of the branch pipe side receiving port 35 against the outer peripheral surface of the end portion of the culvert branching tube 33, the main pipe side receiving ports 34, 35 are pressed. The end portions of the culvert tubes 32 and 33 can be inserted and connected. Furthermore, a cover material 17 can be attached as necessary.

  In addition, in the case of the cheese shown in the second embodiment and the cross shown in the third embodiment, the main pipe side receiving port has a large diameter and the branch pipe side receiving port has a small diameter, so that the small diameter undercarriage branch pipe is changed from the large diameter undercarriage main pipe. Can be branched and connected. Further, a non-porous pipe used as a confluence pipe or the like can be connected to the main pipe side receiving port, and a culvert main pipe can be connected to the branch pipe side receiving port.

  Further, in the description of each embodiment, the operation of simultaneously inserting the end portions of the culvert pipes into the receiving ports by pressing the culvert pipe joints against the culvert pipes arranged at predetermined positions has been described. In addition, with each joint placed at a predetermined position at the bottom of the pipe burying groove, each of the culvert pipes is pressed one by one toward the slit at the predetermined position, and the end of each culvert pipe is inserted and connected to each receiving port. You may do it.

FIG. 1 is a perspective view showing a first embodiment of a culvert tube joint according to the present invention and showing a state before connection. It is a partially cutaway front view of the joint for a culvert tube. FIG. 3 is a sectional view taken along line III-III in FIG. 2. It is sectional drawing which shows the state in connection. It is a perspective view which shows the state after a connection. It is a perspective view which shows the 2nd example of the coupling for culvert pipes of this invention, and shows the state before a connection. It is a perspective view which shows the state after a connection. It is a bottom view which shows the 3rd example of a coupling for culvert pipes of this invention. It is a top view which shows the state which laid the culvert main pipe and the culvert branch pipe in the pipe embedding groove. It is a cross-sectional front view which shows the state before a connection.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Joint for a culvert pipe, 12 ... Joint main body, 13 ... Receptor, 13a ... Receptor open end, 13b ... Receiving blade both wing parts, 14 ... Cut part, 15 ... Slit, 16 ... Underdrain pipe, 16a ... Pipe end, 16b: Water passage hole, 17 ... Cover material, 18 ... Opening, 21 ... Joint for underdrain pipe (cheese), 22 ... Underdrain main pipe, 23 ... Underdrain branch pipe, 24 ... Main pipe side receiving port, 25 ... Branch pipe side receiving port, 31 ... Screw pipe joint (cross), 32 ... Scait main pipe, 33 ... Scait branch pipe, 34 ... Main pipe side receiving port, 35 ... Branch pipe side receiving port, 36 ... Main pipe pipe burying groove, 37 ... Branch pipe burying groove, 38 ... cutting position

Claims (2)

  A joint made of an elastically deformable material provided with a receiving port for connecting a culvert tube buried in the ground, provided with a notch for a half circumference in the circumferential direction at the base of the receiving port, A joint for a culvert tube characterized in that a slit in the axial direction of the receiving port is provided between the insertion portion and the open end of the receiving port.   A cover member made of an elastically deformable material, having an inner diameter corresponding to the outer diameter of the receiving port and a length corresponding to the length of the receiving port, and a receiving member connected to the end of the culvert tube. The joint for a culvert pipe according to claim 1, wherein the joint is attached to an outer periphery of the mouth, and the slit is covered with the cover material.

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