JP4118854B2 - Distribution pipe connector and distribution pipe connection structure - Google Patents

Description

  The present invention relates to a connection device for a flow tube for connecting flow tubes to each other and a connection structure for a flow tube formed by connecting flow tubes to each other in series using the connection tool for the flow tubes.

  Conventionally, in order to discharge excess moisture in the ground or prevent the liquefaction phenomenon that occurs during an earthquake, a drain member having a predetermined length is buried in the ground in a state of being connected in series. The underground water is discharged to the ground through the member.

  As the drain member, a member made in a cylindrical shape is used by accumulating and solidifying a string-like body made of thermoplastic resin in a molten state while irregularly meandering in the mold. The member is formed in a state where innumerable through holes are irregularly penetrated between the inner and outer peripheral surfaces between the string-like bodies made of thermoplastic resin.

  In order to connect the drain members formed in this way in series as described above, a connecting tool is used, and as such a connecting tool, Patent Document 1 has a plurality of fins extending radially from the center. A drain member connector is disclosed in which irregularities are formed on the outer edge of the fin and a partitioning projection is provided at a substantially intermediate portion in the length direction.

  Then, one half part and the other half part of the connecting member of the drain member are inserted into each of the opening end portions facing each other of the pair of drain members connected in series, and the convex part of the connecting member of the drain member is inserted into the drain member. A pair of drain members are connected and integrated by engaging with the through holes.

  However, since the through hole formed in the drain member described above is irregularly formed in the length direction and the circumferential direction of the drain member, the size of the through hole is also irregularly formed. When the drain member connector is inserted into the open end of the drain member, a part of the fin's convex portion is not located in the through hole portion of the drain member, and the situation that the drain member cannot be locked in the through hole of the drain member appear.

  In such a case, while the tip end surface of the fin protrusion in the drain member coupling tool is in contact with the inner peripheral surface of the drain member, the drain member coupling tool has the fin unevenness. Since the fins are continuously formed in the length direction of the fins and the adjacent convex portions are formed in a very close state, they are not positioned well in the through-hole portion of the drain member and are not located on the inner peripheral surface of the drain member. Even though the convex portion adjacent to the convex portion of the fin in the riding state is well positioned in the through hole of the drain member, it is in a state where it floats from or is close to the inner peripheral surface of the drain member. There is a problem that the member cannot be locked to the through hole of the member or the state of locking to the through hole becomes insufficient, and the connecting member of the drain member is easily detached from the opening end portion of the drain member.

Japanese Patent Laid-Open No. 2003-184064

  [Technical Field] The present invention relates to a distribution pipe connector that can firmly connect flow pipes such as drain members in series, and a flow pipe formed by connecting the flow pipes in series using the connection pipe. Provide a connection structure.

As described in claim 1 , the connecting device for the flow pipe of the present invention is a connecting tool for connecting the cylindrical flow pipes formed with innumerable through holes penetrating between the inner and outer peripheral surfaces. And inserted into the opposing open ends of the pair of flow pipes, and engaged with the through holes of the flow pipes on the outer peripheral surface of the cylindrical connector body connecting the flow pipes in series. many retaining projections, the spacing between the locking projection circumferentially adjacent and longitudinal direction, Yes and projected to exist a distance greater than the width of the adjacent directions in these locking projection, the locking projection The insertion side end face of the locking projection at the opening end of the flow pipe of the coupling body and the circumferential side end face of the coupling body are formed with respect to the outer circumferential surface of the coupling body. It includes a locking projection formed on an inclined guide surface having an obtuse angle .

In the connecting device for the flow pipe, the invention according to claim 2 is characterized in that three or more locking projections are projected at predetermined intervals on an elliptical virtual line cut obliquely in the connecting device body. It is characterized by.

Further, the connector of the flow pipe, the invention according to claim 3, that is formed at predetermined intervals the projection rows consisting of three or more of the locking projections in the longitudinal direction of the connector body Features.

And in the connector of the connector of the above-mentioned flow pipe, the invention according to claim 4 is characterized in that the locking projections are projected on the spiral imaginary line on the outer peripheral surface of the connector main body at a predetermined interval. It is characterized by.

Furthermore, in the above-mentioned connecting device for the flow pipe, the invention according to claim 5 is characterized in that an annular partition portion that abuts the opening end surface of the flow pipe is formed at the central portion in the length direction of the connecting tool body. To do.

Further, in the above-mentioned connecting device for the distribution pipe, the invention according to claim 6 is provided with a plurality of parts in each of one half part and the other half part of the connecting tool body that are partitioned in the longitudinal direction around the partition part of the connecting tool body. The individual locking projections are provided so as not to overlap each other in the length direction of the connector main body.

Furthermore, in the above-mentioned connecting device for the distribution pipe, the invention according to claim 7 is a slit portion that penetrates the inner and outer peripheral surfaces of the connecting device main body in a state where a part of the connecting device main body portion around the locking projection remains. The locking projection is elastically tiltable and displaceable inward and outward with the remaining portion as a fulcrum.

Finally, according to the connection structure of the flow pipe, as described in claim 8, the connection tool of the flow pipe is inserted into the opposed open end portions of the pair of cylindrical flow pipes, The stop protrusion is locked to the through hole of the flow pipe, and these flow pipes are connected in series.

  The connecting device for a flow pipe of the present invention is a connecting tool for connecting cylindrical flow pipes formed with innumerable through holes penetrating between inner and outer peripheral surfaces, and is opposed to a pair of flow pipes. A large number of locking projections, which are inserted into the opening end portion of the cylindrical connector body, and are connected to the through-holes of the flow pipes, on the outer peripheral surface of the pipe connecting body in series. Since the spacing between the locking projections adjacent to each other in the vertical direction is larger than the width of the locking projections in the adjacent direction, it is irregularly formed on the flow pipe. When the locking protrusion of the connecting member of the flow pipe is locked into the through hole, and the connecting protrusion of the flow pipe is fixed in the opening end of the distributing pipe, Even if one of the locking projections is not positioned in the through hole of the flow pipe and rides on the inner peripheral surface of the flow pipe, Since the locking projections adjacent to the raised locking projections are sufficiently spaced from each other, the locking projections are not affected by the raised locking projections and are not affected by the through holes of the flow pipe. Can be stopped.

  Therefore, it is possible to lock as many as possible the locking protrusions of the connector in the through hole of the flow pipe, and firmly fix the connection tool of the flow pipe to the opening end of the flow pipe. Can be firmly connected and integrated.

  In the above-mentioned connecting device of the distribution pipe, when three or more locking projections are provided at predetermined intervals on an elliptical virtual line cut obliquely in the connecting body, the distribution pipe When the coupling tool is inserted into the opening end of the flow pipe, the number of the locking protrusions simultaneously inserted from the opening end edge of the flow pipe into the opening end is reduced, so that the locking protrusion and the opening of the flow pipe are reduced. Friction with the end edge can be reduced, and the connecting member of the flow pipe can be inserted and fixed more smoothly into the open end of the flow pipe.

  Further, in the above-mentioned connecting device of the distribution pipe, when the projection row composed of three or more locking projections is formed at a predetermined interval in the length direction of the connecting device body, the locking projections are connected to the connecting device. Projected in a distributed state in the length direction of the main body, the locking state of the locking projections of the flow pipe coupling tool and the through hole of the flow pipe is substantially biased in the length direction of the flow pipe connection tool. It can be formed without any problem, and the connection between the connecting device of the flow pipe and the flow pipe can be further strengthened and stabilized.

  On the other hand, in the above-mentioned distribution pipe connector, when the locking projections are projected on the spiral imaginary line on the outer peripheral surface of the connector main body at a predetermined interval, the distribution pipe connector is connected to the distribution pipe. When inserting into the opening end of the connecting pipe, it is possible to insert the locking projections one by one into the opening end of the flow pipe, and to connect the connecting tool of the flow pipe in one direction in the circumferential direction of the connecting tool body or vice versa. It can be inserted into the open end of the flow pipe while alternately twisting in the direction by a predetermined angle, and the connection tool of the flow pipe can be easily inserted into the open end of the flow pipe.

Further, in the above-mentioned connecting device of the flow pipe, the locking protrusion is formed in a truncated quadrangular pyramid shape, the insertion-side end surface of the locking protrusion on the opening end of the flow tube of the connecting tool main body and the periphery of the connecting tool main body. the angle forming the direction-side end face with respect to the outer peripheral surface of the connector body forms an obtuse angle inclined guide surfaces, the circumferential direction of the one direction or the opposite direction of the connector body the coupling of the flow pipe By inserting into the opening end of the flow pipe while alternately twisting at a predetermined angle, it is possible to prevent the locking protrusion from being caught unexpectedly on the inner peripheral surface of the flow pipe due to the presence of the inclined guide surface of the locking protrusion. It is possible to more easily insert and fix the connecting member of the flow pipe into the open end of the flow pipe.

  Furthermore, in the above-mentioned connecting device for the flow pipe, when an annular partitioning portion that contacts the opening end surface of the flow pipe is formed at the center in the length direction of the connection tool body, the pair of flow pipes are connected to the flow pipe. In a state of being connected in series using a connector, both surfaces of the partition portion of the connector of the flow pipe are brought into contact with each of the opening end surfaces of the flow pipe.

  Therefore, even when a pair of flow pipes connected in series is subjected to a stress (refractive stress) to be refracted at the connected portion, the partition portion of the flow pipe connector is received by the opening end face of the flow pipe. It resists the above-mentioned refractive stress in such a way that it is stopped, and the series state of the pair of flow pipes can be reliably maintained.

  In addition, since the partition portion of the connecting member of the flow pipe is formed in an annular shape, even if the refractive stress is applied from any direction to the pair of flow pipes connected in series, the flow pipe The partition part of the pipe connector reliably resists refractive stress, and reliably maintains the state in which the pair of flow pipes are connected in series.

  Further, in the above-mentioned connecting device of the distribution pipe, a plurality of locking projections are connected to each other in one half portion and the other half portion of the connecting device body that are partitioned in the length direction around the partition portion of the connecting device body. When protruding so as not to overlap in the length direction of the fixture body, the locking projection can be locked to the through hole of the flow pipe without being biased in the length direction and circumferential direction of the connector body. The pair of flow pipes can be firmly connected and integrated by stably fixing the connection tool of the flow pipes within the opening end of the flow pipe.

  Further, in the above-mentioned connecting device of the flow pipe, the remaining portion is formed in a slit portion penetrating the inner and outer peripheral surfaces of the connecting device main body in a state in which a part thereof remains in the connecting device main body portion around the locking projection. When the locking projection is configured to be elastically tiltable and displaceable inward and outward as a fulcrum, the locking projection is inserted into the inner end of the flow tube when the connecting device of the flow tube is inserted into the opening end of the flow tube. By pressing by the surface, it can be elastically immersed inward, reducing the friction between the locking projection and the inner peripheral surface of the flow pipe, and easily connecting the flow pipe connector into the open end of the flow pipe Can be inserted.

  And once the latching protrusion of the connection tool of the flow pipe is locked in the through hole of the flow pipe, the locked state can be securely held, and the pair of flow pipes are firmly secured by the flow pipe connection tool. Can be connected and integrated.

  An example of the connector for a distribution pipe of the present invention will be described with reference to the drawings. As shown in FIG. 1, the connector main body 1 in the connector A of the flow pipe has an outer diameter that substantially matches the inner diameter of the flow pipe B, which will be described later, and has a flow hole 11 that penetrates in the length direction. The both end portions in the length direction are slightly reduced in diameter.

  And in the center part of the length direction in the said connector main body 1, the annular partition part 2 which has the fixed width and fixed thickness contact | abutted to the opening end surface of the flow pipe B is with respect to the outer peripheral surface of the connector main body 1. The connector main body 1 is formed in a direction orthogonal to each other, and has an outer appearance centered on the partition portion 2 in one half (the lower portion of the partition portion 2 in the connector main body 1 in FIG. 2) and the other half. 2 (in FIG. 2, the upper part of the partition part 2 in the connector main body 1). The partition portion 2 is preferably an annular shape or a polygonal annular shape such as a quadrangle (see FIG. 10). However, a part of the annular shape is cut out in the radial direction so that the circumferential direction of the connector main body 1 is increased. It may be formed intermittently.

  Further, on the outer peripheral surface of the connector main body 1, a large number of locking projections 12, 12,... That are locked to the through hole B1 of the flow pipe B are formed. Specifically, as illustrated in FIGS. 1 to 3, four parallel parallel fours formed by obliquely cutting the connector main body 1 at a predetermined angle α with respect to the axis X of the connector main body 1. Three or more (six in FIG. 1 to 6) locking projections 12, 12,... Are projected on the elliptical imaginary line 13 at predetermined intervals. Note that the locking projections may protrude from a portion other than the imaginary line 13, but the portion other than the imaginary line 13, such as the locking projection 12 ', does not project the locking projection. Is good.

  In other words, a projection row is formed by three or more locking projections 12, 12... On the same imaginary line 13, and this projection row has a predetermined interval in the length direction of the connector main body 1. They are formed parallel to each other.

  Further, the locking projections 12, 12... Of one half of the connector main body 1 are provided so as not to overlap each other in the length direction of the connector main body 1, and the other half of the connector main body 1. The locking protrusions 12, 12... Of the portions are also provided so as not to overlap each other in the length direction of the connector main body 12.

  Thus, since the locking projections 12 are formed in a state of being distributed on the outer peripheral surface of the connector main body 1, the locking protrusions 12 of the connector A of the flow pipe are connected to the length direction and the circumference of the connector main body 1. It can be locked in the through hole B1 of the flow pipe B without any deviation in the direction, and one half or the other half of the flow pipe connector A is fixed stably in the open end B2 of the flow pipe B as a whole. Can be made.

  1-3, although the said virtual line 13 showed the case where two each were formed in each one half part and other half part of the connector main body 1, each one half part and other half part of the connector main body 1 were shown. Three or more may be formed, and preferably 2 to 4 are formed. On the other hand, if the angle α is small, the connecting device A of the flow pipe is easily removed from the flow tube B. On the other hand, if the angle α is large, it is difficult to insert the connecting device A of the flow pipe into the flow tube B. 80 ° is preferred.

  All the locking projections 12 are formed in a truncated quadrangular pyramid shape, and the insertion-side end surface 121 of the locking projection 12 into the opening end B2 of the flow pipe B of the coupling main body 1 and the coupling main body 1 are provided. The circumferential side end surfaces 122 and 122 are formed as inclined guide surfaces having an obtuse angle with respect to the outer peripheral surface of the connector main body 1, while the central side end surface 123 of the locking projection 12 is the outer peripheral surface of the connector main body 1. Is formed on a locking surface having an acute angle (see FIGS. 4 and 5). Note that the locking projections need not all have the same shape and the same size, and the locking projections do not have to have a truncated quadrangular pyramid shape, and each locking projection has a different shape or size. It may be.

  In this way, by forming the insertion side end surface 121 and the circumferential side end surfaces 122, 122 of the locking projection 12 on the inclined guide surface, one half or the other half of the connection pipe A is opened in the flow pipe B. When inserting into the end B2, the friction generated between the locking projection 12 and the inner peripheral surface of the flow pipe B is reduced, or the locking protrusion 12 is locked unexpectedly in the through hole B1 of the flow pipe B. Therefore, one half or the other half of the connector A of the flow pipe can be smoothly inserted into the open end B2 of the flow pipe B.

  Further, the locking projections 12, 12... Have a distance between the locking projections 12, 12 adjacent to each other in the circumferential direction and the length direction of the connector main body 1 more than the width of the locking projections in the adjacent direction. Protrusions are provided so that they are spaced widely.

Specifically, the interval W ₁ between the locking projections 12 and 12 adjacent to each other in the circumferential direction of the connector main body 1 is wider than the circumferential width W ₂ of the connector main body 1 in these locking projections 12. together are projected as the spacing W ₃ between the locking protrusions 12, 12 adjacent in the length direction of the connector body 1, the width W in the length direction of the connector body 1 in these retaining projections 12 ₄ are projected so as to be wider interval than (see FIGS. 4 and 5).

The interval W ₁ (W ₃ ) between the locking projections 12 and 12 adjacent in the circumferential direction (length direction) of the connector main body 1 is the locking protrusion in a state along the outer peripheral surface of the connector main body 1. The length of the shortest line among 12 and 12 connecting lines.

Further, the circumferential width W ₂ of the connector main body 1 at the locking protrusion 12 is the maximum width of the locking protrusion 12 along the outer peripheral surface of the connector main body 1 in the direction orthogonal to the axis of the connector main body 1. the good, the connector body 1 in the locking projection 12 and the width W ₄ in the longitudinal direction, connecting device connector body 1 in the direction parallel to the axis of the body 1 outer peripheral surface of the locking projection 12 along The maximum width.

Furthermore, when the shape and magnitude | size of the two latching protrusions 12 and 12 adjacent to the circumferential direction (length direction) of the connector main body 1 differ from each other in the circumferential direction (length direction) of the connector main body 1. the width W ₂ of the locking projection 12 (W _4), refers to the width W ₂ (W ₄₎ of the larger of the widths of the two locking projections 12, 12.

When one half or the other half of the connector A of the flow pipe is inserted into the open end B2 of the flow pipe B, for example, the locking projection 12a is positioned in the through hole B1 of the flow pipe B in FIG. Even if it is in a state where it rides on the inner peripheral surface of the flow pipe B, the latching projection 12a that has run over and the latching projection 12a adjacent to the latching projection 12a in the circumferential direction and the lengthwise direction respectively. Since the distances W ₁ and W ₃ between the protrusions 12b and 12c are sufficiently large, the effect of the engaging protrusion 12a that has ridden does not reach the engaging protrusions 12b and 12c adjacent to the engaging protrusion 12a.

Accordingly, each locking projection 12 can be locked in the through hole B1 of the flow pipe B without being affected even if the adjacent locking protrusion 12 rides on the inner peripheral surface of the flow pipe B. As much as possible, the locking projection 12 of the flow pipe connector A is locked in the through-hole B1 of the flow pipe B to effectively prevent the flow pipe connection tool A from accidentally coming out of the flow pipe B. can do.

  Next, how to use the above-mentioned distribution pipe connector A will be described. First, an example of the flow pipe B in which the connection tool A of the flow pipe is used will be described. For example, as shown in FIG. 6, the flow pipe B is disposed in an outer restricting tool C1 having a cylindrical through hole C10 penetrating in the vertical direction, and an upper end opening of the through hole C10 of the outer restricting tool C1. It is manufactured using a restricting tool C composed of a cylindrical inner restricting tool C2.

  Then, the molten thermoplastic resin string extruded after being melt-kneaded by the extruder is irregularly meandered in the space formed between the opposed inner surfaces of the inner and outer regulators C1, C2. While supplying, accumulating and solidifying, a cylindrical flow pipe B having a certain length and a certain thickness is manufactured. As shown in FIG. 7, the circulation pipe B is formed with an infinite number of through holes B1 penetrating between the inner and outer peripheral surfaces between the string-like bodies. A fluid such as a liquid or a gas can be circulated from the inside to the outside or from the outside to the inside of the circulation pipe B.

  However, in order to connect the pair of flow pipes B and B manufactured as described above in series, first, the flow pipe is inserted into the open end B2 of one flow pipe B of the pair of flow pipes. One half of the connector A is pressed and inserted until the partition 2 of the connector A contacts and is received by the opening end surface of the flow pipe B.

  At this time, the connecting device A of the flow pipe is inserted into the flow tube B while alternately twisting the connecting tool A in the circumferential direction of the connecting device main body 1 at a predetermined angle in the circumferential direction. Can be smoothly inserted into the connector main body 1. Since the locking projection 12 of the connecting device A of the flow pipe has an insertion side end surface 121 and circumferential side end surfaces 122, 122 formed on the inclined guide surface, the locking projection 12 is connected to the inner peripheral surface of the flow pipe B. Therefore, one half of the connecting pipe A can be smoothly inserted into the open end B2 of the flow pipe B.

  And among the locking projections 12 of the connector A of the flow pipe, the locking projections 12 located in the through-hole B1 of the flow pipe B are in a state of being locked to the through-hole B1, while the through-hole B1 of the flow pipe B The locking projections 12 that are not positioned in the position are in a state of riding on the inner peripheral surface of the flow pipe B.

  However, as described above, the locking projections 12 of the connecting device A of the flow pipe have sufficient intervals between the locking projections 12 and 12 adjacent to each other in the circumferential direction and the length direction of the connecting device body 1. Therefore, when one locking protrusion 12 is positioned in the through hole B1 of the flow pipe B, the locking protrusion 12 adjacent to the locking protrusion 12 rides on the inner peripheral surface of the flow pipe B. Without being affected by whether or not it is, it is securely locked in the through hole B1 of the flow pipe B.

  Moreover, three or more (six in FIG. 1 to 6) locking projections 12 project from the imaginary line 13 that is obliquely cut in the connector main body 1 at a predetermined interval. Since the locking projections 12 projecting on the imaginary line 13 form a projection row, a plurality of the projection rows are arranged in parallel with each other at a predetermined interval in the length direction of the connector body 1. A plurality of locking projections 12 are provided in a generally regular and dispersed manner on one half of the connector main body 1, and the locking projections 12 are locked in the through holes B1 of the flow pipe B. By doing so, one half part of the connector A of the flow pipe can be stably fixed as a whole in the open end B2 of the one flow pipe B.

  Next, the open end B2 of the other flow pipe B is fitted into the other half of the above-mentioned flow pipe connector A. The procedure is as follows. Since it is the same as the procedure for inserting and fixing in the opening end of this, it is omitted.

  Thus, the pair of flow pipes B and B connected in series using the connection tool A of the flow pipe is formed substantially entirely on the outer peripheral surface of the connection tool body 1 in the connection tool A of the flow pipe. The locking projections 12 are firmly connected and integrated by locking the through-holes B1 of the flow pipes B and B.

  In the above-described manner, in a state where the pair of flow pipes B and B are connected in series using the flow pipe connection tool A, the flow pipe connection tool is connected between the opening end faces of the flow pipes B and B facing each other. The partitioning part 2 of A is sandwiched, and both surfaces of the partitioning part 2 are in full contact with the respective open end faces of the two flow pipes B.

  Therefore, in the case where stress is applied to the pair of flow pipes B, B connected in series to refract these flow pipes B, B in any direction, the flow pipe connection tool A The annular partition 2 is received by the opening end face of the flow pipe B to receive the above refraction stress, and the pair of flow pipes B and B are prevented from being refracted at the connection portion, so that a serial connection state is established. Maintain reliably.

  By repeating such a procedure, a plurality of flow pipes B, B... Can be connected and integrated in series via the connection tool A of the flow pipe, and the plurality connected in series in this way. For example, as shown in FIG. 11, the distribution pipes B, B,... Of the book are buried in the ground to prevent the ground liquefaction phenomenon that occurs during an earthquake, or (2) As shown in Fig. 12, it is buried in industrial waste deposits, gas generated from the industrial waste buried matter is released to the outside, and the liquid in the buried waste is discharged, or in the sediment Used to inject liquids into the ground, (4) buried in the ground and used as a soil purification material to purify the soil, and (5) buried in the ground to remove excess moisture in the ground. Used as a ground improvement material for discharging water or injecting liquid, or (7) Water quality that is disposed in an aeration tank to purify water quality Used as reduction materials.

  In the above-described connecting pipe A, the description has been given of the case where the locking projection 12 is projected along the elliptical imaginary line cut obliquely in the connecting body 1. As shown in FIG. Locking protrusions 12 may be provided on the virtual spirals 3a and 3b drawn on the outer peripheral surfaces of one half and the other half of the main body 1, respectively. If comprised in this way, when inserting one half part or other half part of the connection tool A of a flow pipe in the opening end part B2 of the flow pipe B, the connection tool A of a flow pipe will be one of the circumferential direction of the connection tool main body. One half or the other half of the flow pipe connector A can be smoothly inserted into the open end B1 of the flow pipe B while alternately twisting in the direction or in the opposite direction by a predetermined angle. Note that the locking protrusions may protrude from portions other than the virtual spirals 3a and 3b, but it is preferable that the locking protrusions not protrude from portions other than the virtual spirals 3a and 3b.

  Further, in the above-mentioned connecting pipe A, the locking projection 12 protrudes from the outer peripheral surface of the connecting body 1 so as not to be displaced, but as shown in FIG. A U-shape with a constant width is formed in a state of penetrating the portion of the connector main body 1 between its inner and outer peripheral surfaces along the side end face 123 and the base end edges of the peripheral side end faces 122 and 122 of the connector main body 1. Even if the slit portion 4 is formed and the locking projection 12 is configured to be elastically tiltable inward and outward with the remaining portion 5 connected to the connector main body 1 at the base end of the insertion side end face 121 as a fulcrum. Good.

  In the above description, the case where the base end edge of the insertion-side end surface 121 of the locking projection 12 is connected to the connector main body 1 has been described. However, the central end surface 123 of the locking projection 12 and the circumferential direction of the connector main body 1 are described. In a state where any one of the base end edges of the side end faces 122 and 122 is left, the U-shaped portion in the same manner as described above is formed on the connecting tool body 1 around the locking projection 12. By forming the slit portion, the locking projection 12 may be configured to be elastically tiltable inward and outward with the remaining portion as a fulcrum.

  As described above, the locking projection 12 is configured to be elastically tiltable and displaceable in the inner and outer directions, so that the locking projection 12 is inserted when inserting the connecting device A of the flow pipe into the open end B2 of the flow pipe B. Is inserted inward by the inner peripheral surface of the flow pipe B to reduce the frictional resistance between the inner peripheral surface of the flow pipe and the locking projection 12 of the connection tool A of the flow pipe, thereby connecting the flow pipes. One half or the other half of the tool A can be inserted and fixed more smoothly into the open end B2 of the flow pipe B.

  In particular, when the base end edge of the insertion-side end surface 121 of the locking projection 12 is connected to the connector main body 1, when inserting the connector A of the flow pipe into the open end B 2 of the flow pipe B, In addition to being able to reduce the frictional resistance between the flow pipe and the locking projection 12 as described above, the central end surface 123 of the locking projection 12 is in an inwardly recessed state. Can be prevented from unexpectedly engaging with the through-hole B1 of the flow pipe B during insertion, and the connecting tool A of the flow pipe can be smoothly inserted into the open end B2 of the flow pipe B. Can be inserted.

  Moreover, since the slit portion 4 is formed so as to penetrate between the inner and outer peripheral surfaces of the connector main body 1, the slit portion 4 flows inside or outside the connector main body 1 through the through hole B 1 of the flow pipe B. The fluid to be tried can be smoothly circulated in the inner and outer directions of the connector main body 1 through the slit portion 4, and the fluid flows in the inner and outer directions of the flow pipe B at the connecting portion of the pair of flow pipes B and B. Can be performed smoothly.

  In addition, a through-hole penetrating the inner and outer peripheral surface of the connector main body 1 of the connector A of the flow pipe may be opened at an arbitrary position. By forming such a through-hole, the above-described through-hole is formed. Similar to the slit portion 4, the fluid can be smoothly circulated in the inner and outer directions of the circulation pipe B at the connecting portion of the pair of circulation pipes B and B.

  Finally, the case where the flow pipe B is formed in a cylindrical shape has been described. However, the flow pipe may be formed in a polygonal tube shape such as a square tube shape. The connector main body 1 of the tool A may be formed in a polygonal cylinder shape such as a square cylinder shape. In other words, the outer shape of the connector main body 1 in the connector A of the distribution pipe is substantially matched to the inner peripheral shape of the cylindrical distribution pipe, and the connector main body 1 in the connector A of the distribution pipe is connected to the open end B2 of the distribution pipe B. What is necessary is just to form the connector main body 1 so that the outer peripheral surface of the connector main body 1 may contact the inner peripheral surface of the flow pipe B substantially entirely when inserted in the inside.

(Example 1)
A distribution pipe connector A as shown in FIGS. That is, an annular partition 2 having a width of 10 mm and a thickness of 2 mm is provided at the center of the cylindrical connector body 1 having an inner diameter of 40 mm, an outer diameter of 50 mm, and a length of 250 mm. It was formed in a direction perpendicular to the surface.

  Then, on the outer peripheral surface of one half of the connector main body 1, as shown in FIGS. 1 to 3, the connector main body 1 is inclined at an angle of 25 ° with respect to the axis X of the connector main body 1. Six locking projections 12, 12... Are projected at predetermined intervals on two elliptical imaginary lines 13 that are formed in a circle and are parallel to each other. The two imaginary lines 13 had an interval of 20 mm in the axial direction of the connector main body 1. In addition, at the distal end portion and the base end portion of the outer peripheral surface of one half of the connector main body 1, two latches with a phase difference of 180 ° in the circumferential direction of the connector main body 1 in a state deviated from the imaginary line 13. Protrusions 12 'and 12' were provided.

  Similarly, on the outer peripheral surface of the other half of the connector main body 1, the connector main body 1 is placed at an angle of 25 ° with respect to the axis X of the connector main body 1 as shown in FIGS. Six locking projections 12, 12... Are projected at predetermined intervals on two elliptical imaginary lines 13 that are formed by obliquely slicing and are parallel to each other. The two imaginary lines 13 had an interval of 20 mm in the axial direction of the connector main body 1. In addition, at the distal end and the base end on the outer peripheral surface of the other half of the connector main body 1, two engagements with a phase difference of 180 ° in the circumferential direction of the connector main body 1 in a state deviated from the imaginary line 13. Stop projections 12 'and 12' were provided.

  Here, the locking projections 12, 12... In one half of the connector main body 1 and the locking projections in the other half of the connector main body 1 are provided so as not to overlap each other in the length direction of the connector main body 12. It was.

  All of the locking projections 12 are formed in a truncated quadrangular pyramid shape, and the insertion-side end surface 121 of the connecting projection main body 1 at the opening end B2 of the coupling main body 1 and the coupling main body 1 of the locking projection 12 are formed. While the circumferential side end surfaces 122 and 122 are formed on an inclined guide surface having an obtuse angle with respect to the outer peripheral surface of the connector main body 1, the central side end surface 123 of the locking projection 12 is the outer peripheral surface of the connector main body 1. Is formed on a locking surface having an acute angle. The upper end surface of the locking projection 12 is formed in a square shape having a side of 2.5 mm, and the outer peripheral edge of the proximal end of the locking projection 12 is 8 mm in the length direction of the connector body 1 and is connected. It was formed in a 6 mm rectangular shape in the circumferential direction of the tool main body 1, and the height of the locking projection 12 was 2 mm in the vertical direction with respect to the outer peripheral surface of the connector main body 1. All of the locking protrusions 12, 12... Protrude with the gap between the locking protrusions adjacent in the circumferential direction and the length direction being wider than the width of the locking protrusions in the adjacent direction. It was set up.

  On the other hand, a distribution pipe was manufactured as follows. As shown in FIG. 6, an outer restrictor C1 having a cylindrical through hole C10 penetrating in the vertical direction, and a cylindrical inner restrictor disposed in the upper end opening of the through hole C10 of the outer restrictor C1. A restriction tool C comprising tool C2 was prepared.

  Then, an ethylene-propylene copolymer having a melting point of 140 ° C. and a melt flow rate MFR of 25 g / 10 min at 230 ° C. is melt-kneaded with an extruder, and a string shape having a circular cross section having a thickness of 1.2 mm. A number of bodies were extruded from the extruder. Then, the extruded many string-like bodies are supplied to the space formed between the opposed inner surfaces of the inner and outer restricting tools C1 and C2 while irregularly meandering, collecting, and solidifying, so that the inner diameter is 50 mm and the outer A cylindrical flow pipe B having a diameter of 100 mm was produced. As shown in FIG. 7, an infinite number of through holes B <b> 1 penetrating between the inner and outer peripheral surfaces between the string-like bodies are formed in the flow pipe B.

  In the opening end B2 of the flow pipe B thus obtained, one half of the connection A of the flow pipe is brought into contact with and received by the opening 2 of the flow pipe B. Until it is pressed and inserted, most of the locking projections 12 of the flow pipe connector A are locked in the through-hole B1 of the flow pipe B. It was firmly fixed in the open end B2 of the tube B.

  The connecting device of the flow pipe of the present invention connects cylindrical flow pipes formed with innumerable through-holes penetrating between the inner and outer peripheral surfaces, and uses the connecting tool of the flow pipe. Multiple distribution pipes connected in series are used for soil contamination purification materials, water purification materials, buried pipes used in liquefaction prevention methods, ground improvement materials, gas emission materials in industrial waste, and industrial waste. Used as a liquid injection or discharge material.

It is the perspective view which showed the coupling tool of the distribution pipe of this invention. It is the front view which showed the coupling tool of the distribution pipe of FIG. It is the rear view which showed the coupling tool of the distribution pipe of FIG. FIG. 4A is a plan view showing the locking projection, and FIG. 4B is a side view showing the locking projection. It is the enlarged front view which showed a part of coupling tool of the distribution pipe of FIG. It is the schematic diagram which showed the manufacturing apparatus of the distribution pipe. It is the perspective view which showed the distribution pipe. It is the perspective view which showed another example of the coupling tool of the distribution pipe of this invention. FIG. 9A is a plan view showing a state in which a slit portion is formed around the locking projection, and FIG. 9B is a cross-sectional view of FIG. 9A. It is the perspective view which showed another example of the coupling tool of the distribution pipe of this invention. It is the schematic cross section which showed the state which used the flow pipe connected in series using the connection tool of the flow pipe of this invention as a buried pipe used for a liquefaction prevention construction method. It is the schematic cross section which showed the state which embed | buried and used the distribution pipe connected in series using the connection tool of the distribution pipe of this invention in industrial waste.

Explanation of symbols

1 Connector body
12 Locking protrusion
13 Virtual line 2 Partition
3a, 3b Virtual line 4 Slit part 5 Remaining part A Distribution pipe connector B Distribution pipe

Claims (8)

It is a connector for connecting cylindrical flow pipes formed with innumerable through holes penetrating between inner and outer peripheral surfaces, and is inserted into the open end portions of a pair of flow pipes facing each other. On the outer peripheral surface of the cylindrical connector main body connecting the flow pipes in series, there are a large number of lock protrusions that are locked to the through holes of the flow pipe, between the lock protrusions adjacent in the circumferential direction and the length direction. The interval between the engagement protrusions is wider than the adjacent width of the engagement protrusions, and the engagement protrusions are formed in a truncated quadrangular pyramid shape. Including a locking projection formed on an inclined guide surface having an obtuse angle with respect to an outer peripheral surface of the connector main body and an end surface on the insertion side to the opening end of the tube and a circumferential side end surface of the connector main body. Characteristic distribution pipe connector.   2. The distribution pipe connector according to claim 1, wherein three or more locking projections are provided at predetermined intervals on an elliptical virtual line cut obliquely in the connector main body. .   3. The distribution pipe coupling tool according to claim 2, wherein a projection row comprising three or more locking projections is formed in the length direction of the coupling tool body at a predetermined interval.   2. The connecting device for a flow pipe according to claim 1, wherein locking projections are provided at predetermined intervals on a spiral imaginary line on the outer peripheral surface of the connecting device main body. The flow pipe according to any one of claims 1 to 4, wherein an annular partition portion that abuts the opening end surface of the flow pipe is formed at a central portion in a length direction of the connector main body. Connector. A plurality of locking projections do not overlap with each other in the length direction of the connector main body in each of the one half and the other half of the connector main body that are partitioned in the length direction around the partition portion of the connector main body. 6. The distribution pipe connector according to claim 5 , wherein the connection pipe is connected in a protruding manner. Formed in a slit that penetrates the inner and outer peripheral surfaces of the connector body with a part of the connector body around the locking projection remaining, and the locking protrusion is elastic inward and outward with the remaining portion as a fulcrum. The connecting device for a flow pipe according to any one of claims 1 to 6 , wherein the connecting device is configured to be capable of being tilted and displaced. The flow pipe connector according to any one of claims 1 to 7 is inserted into opposed opening ends of a pair of cylindrical flow pipes, and a locking projection on the flow pipe connection tool is inserted into the flow pipe. A connection structure for a distribution pipe, wherein the distribution pipes are connected to each other in series and are connected in series.

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