WO2014013577A1

WO2014013577A1 - Sheet for sheet pipe and forming device therefor

Info

Publication number: WO2014013577A1
Application number: PCT/JP2012/068246
Authority: WO
Inventors: 伊正田村; 敏之井町; 幸男木村; 将統阿部
Original assignee: 協和建設工業株式会社
Priority date: 2012-07-18
Filing date: 2012-07-18
Publication date: 2014-01-23
Also published as: BR112013010242B1; BR112013010242A2; JP5232940B1; JPWO2014013577A1

Abstract

Provided are a sheet for sheet pipes that is capable of being formed securely and easily into a tubular shape and a sheet pipe sheet-forming device that is capable of low cost and time efficient installation. A sheet for sheet pipes and a forming device therefor configured so that, of the edges of a flexible synthetic resin sheet in which multiple pores have been pierced, a pair of parallel edges form portions that are joined when the sheet is formed in a tubular shape. On one of said edges, multiple tongue sections provided with inserted sections and notched sections, which are narrower than said inserted sections, are formed in a row at regular intervals. On the other edge, multiple incisions are provided in a row to correspond to the multiple tongue sections. When the tongue sections and incisions are mutually bent and the tongue sections are inserted in the incisions from above to form the tubular shape, the margin of the inserted section of the bent tongue section can be inserted following the inner surface of the bent incision.

Description

Seat pipe seat and molding apparatus therefor

The present invention relates to a sheet for a sheet pipe and a molding apparatus for the sheet pipe used for a sheet pipe in which a flexible flat plate is molded into a cylindrical shape and is embedded in a formation to guide or drain groundwater, and in particular, at a joint portion of the sheet. The present invention relates to a seat for a seat pipe that includes a tongue piece portion and a cut portion having flexibility, and is configured so that the bent tongue piece portion can be inserted into the bent cut portion.

Conventionally, underdrainage methods in farmland have been widely used open excavation methods that excavate shallow layers of the ground and embed already formed pipes such as vinyl chloride perforated pipes and ceramic pipes. I'm cite.
However, in order to embed a molded pipe, the total cost including the transportation cost increases, and the construction speed until completion of the culvert is slow. For this reason, a technology has been developed and implemented, in which a flexible plastic sheet is formed in the shape of a pipe instead of a molded pipe, and this is sequentially embedded in the ground. In addition, in order to shape | mold a plastic sheet in pipe shape, it was performed by adhere | attaching or crimping | bonding and connecting the edge parts which oppose when a sheet | seat is curved.
However, such bonding or pressure bonding still requires construction cost and time, and the above-described problems cannot be solved sufficiently.
Therefore, in order to solve such problems, in recent years, a technique for forming a pipe by connecting the end portions of a sheet by a “hatch method” or the like has been developed, and several inventions have already been disclosed. ing.

For example, Patent Document 1 discloses an apparatus for continuously molding a cylinder body embedded in the soil and used for irrigation drainage or the like using a belt-shaped plastic sheet under the name “plastics sheet continuous cylinder molding apparatus”. The idea about is disclosed.
Hereinafter, the device disclosed in Patent Document 1 will be described. The device related to the plastics sheet continuous cylinder forming apparatus disclosed in Patent Document 1 is provided with a cylindrical curved sheet seam edge reduction tool on the upper part of the cylindrical bending guide of the belt-shaped plastic sheet, and the pulling tool is pulled on the reduction tool. Subsequently, a cylindrical forming ring is provided, and the belt-shaped plastic sheet is formed so as to pass through the inside of the cylindrical forming ring from the cylindrical bending guide in the longitudinal direction thereof.
Furthermore, this strip-shaped plastic sheet will be described with reference to FIG. In FIG. 8, a belt-shaped plastic sheet 27 includes a plurality of small holes 29, a plurality of check tongue pieces 31 connected in series along a seam edge 30a, and a seam edge. A plurality of check holes 32 are formed in series so that the check tongue pieces 31 can be inserted along 30b and provided with check cuts 32a on the left and right ends.
In the plastics sheet continuous cylinder forming apparatus having such a feature, when the strip-shaped plastic sheet 27 is inserted into the cylindrical bending guide, the strip-shaped plastic sheet 27 is guided and guided by the guide and is bent into a cylindrical shape. The

seam edges

30a and 30b are close to each other. Next, when the

seam edges

30a and 30b are squeezed by a squeezing tool, the check tongue piece 31 is inserted into the check hole 32, and the belt-shaped plastic sheet 27 has a curved cylindrical shape. Furthermore, when the belt-shaped plastic sheet 27 is guided into the cylindrical molding ring, the outer diameter thereof is reduced, and the check tongue piece 31 completely enters the check hole 32 to complete the cylinder. Has an effect. Therefore, the belt-shaped plastic sheet 27 can be easily and continuously formed into a cylindrical body.

Next, Patent Document 2 discloses an invention relating to a method of undergrounding a wire or the like used in irrigation work, cable laying work, or the like under the name “line, pipe or cable undergrounding method”.
Hereinafter, the invention disclosed in Patent Document 2 will be described. The invention relating to the underground burying method such as a wire disclosed in Patent Document 2 is made by connecting a polymer material sheet and a squeeze passing through the cylindrical interior to a drilling body that is advanced by a drilling machine. After being placed in the soil, the perforated body is advanced to form the tubular molded body so that the sheet does not return to the original flat plate shape, and after these are laid in the ground, the tubular molded body and the sword Is removed from the perforated body, and further, the tip of a line or the like is bound to the scoring, and only the scoring is pulled.
In the underground burying method such as a line having such a feature, a perforation is excavated behind the perforated body by the traveling of the perforator. Since the perforated body is connected with the sheet of the polymer material, the sheet is successively drawn out as the perforated body progresses to form a cylindrical molded body and is laid along the perforated body. Moreover, since the squeezing has passed through the cylindrical molded body, the cylindrical molded body and the stub are laid in the ground. After that, the tubular molded body and the stub are separated from the perforated body, the tip of the line is bound to the rear end of the stub, and the stub is further pulled out so that the line is laid in the cylindrical molded body. Has the effect of Therefore, it is possible to lay a wire or the like in the ground easily, quickly and inexpensively. In addition, the size and quantity of these lines can be freely selected.

Japanese Utility Model Publication No. 52-133265 JP 56-163308 A

However, in the device disclosed in Patent Document 1, the

joint edges

30a and 30b of the adjacent strip-shaped plastic sheet 27 are squeezed down and the check tongue 32 is inserted into the check hole 32. That is, the cylindrical curved sheet is formed by the above-described “hatch method”.
However, since it is difficult to insert the check tongue piece into the check hole, the

joint edges

30a and 30b are insufficiently connected to each other, so that this portion is frequently detached and the tubular shape cannot be maintained. was there. Further, when the check tongue piece 31 is inserted, stress concentrates on the check notch 32a, which causes a problem that this portion is torn.

In addition, in the device disclosed in Patent Document 2, although it is said that “the sheet is formed into a cylindrical molded body without returning to the original flat plate shape”, a detailed description regarding a specific forming method is provided. It is unclear. Further, since the guide has an open portion on the upper side and the open portion has a pair of trumpet shapes having the same shape, there is a possibility that the leading ends of the wound sheets collide with each other. Therefore, there is a possibility that a reduction in winding speed or a molding failure of the cylindrical molded body may occur.

The present invention has been made in response to such a conventional situation, and a sheet pipe sheet that can be reliably and easily formed into a cylindrical shape and a sheet pipe sheet that can be cost-effectively and time-efficiently constructed. An object of the present invention is to provide a molding apparatus.

In order to achieve the above object, the seat pipe seat according to the invention of claim 1 is formed of a synthetic resin flexible flat plate having a plurality of small holes formed in a cylindrical shape and embedded in the formation. A seat pipe seat used for a seat pipe for guiding or draining groundwater, and among the end portions of the seat pipe seat, a pair of parallel end portions form a joint portion when formed into a cylindrical shape. Of these, one end portion is formed in series with a plurality of tongue pieces having an insertion portion and a notch portion whose width is narrower than that of the insertion portion, and the other end portion is formed with the plurality of tongues. A plurality of incisions are provided in series in line with the piece, and when the tongue piece and the notch are bent from each other, the tongue piece is inserted from above the notch and molded into a cylindrical shape. The outer circumference of the insertion part of the bent tongue piece part is configured to be inserted along the inner circumference of the bent cut part. And wherein the Rukoto.
In the seat pipe seat having the above-described configuration, “the outer periphery of the insertion portion of the bent tongue piece portion can be inserted along the inner periphery of the bent cut portion” means that the tongue piece portion is not bent. This means that it is difficult to insert into a not-bent notch. However, for example, by applying pressure to deform the tongue piece portion and the cut portion, the insertion portion is easily inserted into the cut portion. Therefore, the joint portion is connected over the whole, and a complete cylindrical seat pipe is formed.
Further, since the tongue piece portion has a notch portion, when the tongue piece portion is completely inserted into the notch portion, the notch portion is locked to the notch portion and has a function of being difficult to separate from each other. . In addition to this, since the tongue piece is inserted from above the notch and is formed into a cylindrical shape, the load on the formation when the seat pipe is embedded is more from the tongue to the notch. Since it acts so that it may approach, the tongue piece part and the notch part will be in a state where it is more difficult to remove after embedding.

And the sheet | seat for seat pipes which concerns on invention of Claim 2 is a sheet | seat for seat pipes of Claim 1, The notch part is the circular arc shape which forms a circular arc in the other edge part side, It is characterized by the above-mentioned. And
In the seat pipe seat having the above configuration, the arc shape means a portion surrounded by the arc and the string, and the other end and the string are parallel to each other. In the seat pipe seat having such a configuration, in addition to the action of the invention according to claim 1, for example, when the maximum width of the tongue piece is longer than the length of the chord and shorter than the inner circumference of the arc, When the cut portion is overlapped below the tongue piece portion and pressure is applied from above the tongue piece portion, the tongue piece portion is bent along the arc shape and the tongue piece portion is inserted into the cut portion. .

Next, the seat pipe seat according to the invention described in claim 3 is the seat pipe seat according to claim 1, wherein the cut portion has a T-shape that forms a vertical image on the other end side. It is characterized by that.
In the seat pipe seat having the above-described configuration, the T-character is a character made up of a horizontal image and a vertical image, and the other end portion and the horizontal image are parallel to each other. In the seat pipe seat having such a structure, in addition to the action of the invention according to claim 1, when the cut portion is overlapped below the tongue piece portion and pressure is applied from above the tongue piece portion, the curved tongue A right-angle portion at the intersection of the T-shaped horizontal image and the vertical image is pressed by the one portion. As a result, the right-angled portion is bent and the T-shape is deformed into an arc shape. Therefore, for example, when the maximum width of the tongue piece is longer than the length of the horizontal image and the maximum width of the tongue piece is shorter than the inner circumference of the arc generated by the deformation, the tongue piece is inserted into the notch. It has the action. In addition, the shape in which the T-shape is deformed includes a circular shape and a triangular shape having a horizontal image as a base.

The seat pipe seat according to the invention described in claim 4 is the seat pipe seat according to any one of claims 1 to 3, wherein the maximum width of the insertion portion of the tongue piece portion is the notch portion. It is characterized by being wider than the maximum width.
In the seat pipe seat having the above-described configuration, the “maximum width of the insertion portion of the tongue piece” and the “maximum width of the cut portion” mean the maximum width and the cutting portion of the insertion portion of the tongue piece portion that is not deformed by any pressure. This means the maximum width of the insert. Therefore, in this seat pipe seat, in addition to the action of the invention according to any one of claims 1 to 3, for example, pressure is applied to deform the tongue piece portion and the notch portion, so that the tongue When the pressurization is stopped after the one part is inserted into the notch part, the tongue piece part and the notch part return to the original undeformed shape. Therefore, the tongue piece has the effect of being difficult to pull out from the notch. On the other hand, when a force for pulling the sheet in both directions is applied in addition to the pressure being applied again to deform the tongue piece and the cut portion, the tongue piece portion can be pulled out from the cut portion.

A seat pipe forming apparatus according to claim 5 is an apparatus for introducing a seat pipe sheet according to any one of claims 1 to 4 and forming a seat pipe, wherein A sheet winding part, an introduction part, a first guide part, and a second guide part that are installed in series along the long axis direction via a support tool. The sheet pipe sheet is wound and held so that the tongue portion and the cut portion of the pipe sheet are formed on the side portions, and the sheet pipe sheet is supplied to the introduction portion. An inlet opening end that introduces the sheet along its longitudinal direction, an outlet opening end that feeds out the introduced sheet pipe sheet, and a reduced diameter with a gap in the upper part from the inlet opening end toward the outlet opening end A pair of wings facing each other The curvature of the wing portion on the tongue piece side is larger than the curvature of the wing portion on the cut portion side so that the tongue piece portion of the seat pipe sheet is inserted from above the cut portion and formed into a cylindrical shape. A wing portion formed in a pair of trumpet tubes, and the first guide portion passes through the seat pipe sheet that is curved and sent out from the outlet opening end, and a passage hole portion that is formed into a cylindrical seat pipe; The second guide part has an annular hole having a diameter smaller than the diameter of the passage hole part and allowing the cylindrical sheet pipe to pass therethrough. Features.
In the seat pipe forming apparatus having the above configuration, the lateral diameter of the passage hole portion of the first guide portion is equal to or less than the maximum distance between the pair of wing portions. Further, the vertical rotation roller rotates in a direction in which a cylindrical sheet pipe can be fed toward the tip.
In the sheet pipe forming apparatus having such a configuration, the sheet for the sheet pipe held by the sheet winding part passes through a pair of wing parts facing each other while reducing the diameter with a gap at the upper part of the introduction part, Both sides are curved upward. And since the curvature of the wing part on the tongue piece part side is larger than the curvature of the wing part on the cut part side, the side part on the cut part side can sink under the side part on the tongue piece part side. It is transformed into a shape.
Next, while the deformed seat pipe seat passes through the passage hole portion of the first guide portion, the side portions on the tongue piece side and the cut portion side overlap each other to form a seam portion. The sheet begins to be deformed into a cylindrical shape. This seam portion is formed in the vicinity of the uppermost cylindrical portion. At the same time, the joint portion is pressed from above by the vertical rotating roller, so that the tongue piece portion is bent into a shape protruding downward and begins to be inserted into the cut portion. At this time, the entire tongue piece portion may not be completely inserted into the cut portion.
Next, since the second guide portion is provided with an annular hole having a diameter smaller than that of the passage hole portion, the diameter of the substantially cylindrical seat pipe is reduced, and the tongue piece portion is pushed deeper into the cut portion. It is. Then, the seat pipe seat is fed in the leading end direction, so that a plurality of serial tongue pieces are sequentially pushed into a plurality of serial cut portions corresponding thereto. That is, a cylindrical seat pipe in which the seam portions are connected is completed.

According to a sixth aspect of the present invention, there is provided a seat pipe forming apparatus according to the fifth aspect of the present invention, wherein the tubular seat pipe passing through the first guide portion is used instead of the second guide portion. A pair of horizontal rotating rollers in contact with both side surfaces are provided.
In the sheet pipe forming apparatus having the above-described configuration, the pair of horizontal rotation rollers rotate in a direction in which the cylindrical sheet pipe can be sent out in the distal direction.
Other functions of the seat pipe forming apparatus having such a configuration are the same as those of the fifth aspect of the invention.

According to the seat pipe sheet of the first aspect of the present invention, since the tongue piece portion is inserted into the cut portion and the seat pipe sheet is formed into a cylindrical shape, it is formed into a cylindrical shape on site. Is easy. Therefore, the transportation cost is lower than that of embedding a pipe that has already been formed into a cylindrical shape. Further, when the tongue pieces are completely inserted from above into the notch, they are difficult to separate from each other, so that it is difficult for the joint portion to be detached after the seat pipe is embedded. That is, since the surrounding mud enters the seat pipe and the drainage is not inhibited, a good drainage function can be exhibited over a long period of time.

According to the seat pipe seat of claim 2 of the present invention, in addition to the effect of the invention of claim 1, when pressure is applied from above the tongue piece, the tongue piece is bent and inserted into the notch. Therefore, it is possible to connect them more easily and reliably than the invention disclosed in Patent Document 1. Therefore, it is possible to avoid a situation in which the joint portion is detached. Further, since the cut portion has an arc shape, there is no portion where stress at the time of insertion of the tongue piece portion is concentrated, so that damage to the cut portion can be avoided.

The seat pipe seat according to claim 3 of the present invention has the same effect as the invention according to claim 1 or claim 2.

According to the seat pipe seat according to claim 4 of the present invention, it is difficult or impossible to pull out the tongue piece portion from the cut portion by stopping the pressurization. On the other hand, the tongue piece can be pulled out by applying pressure and pulling the sheet to the side. Therefore, in the seat pipe seat according to the present invention, in addition to the effect of the invention according to any one of claims 1 to 3, the seat pipe seat can be freely formed into a cylindrical or sheet-like shape. Either can be formed.

According to the sheet pipe forming apparatus of the fifth aspect of the present invention, the sheet pipe sheet held by the sheet winding portion is introduced into the introduction portion, and then passes through the second guide portion to form a cylindrical shape. The seat pipe can be formed automatically. Therefore, it is possible to quickly form the seat pipe with a small manual work load.
In addition, the molded sheet pipe has a strong joint portion because the tongue portion of the substantially tubular sheet pipe is pushed deeply into the cut portion by the second guide portion. Therefore, there is almost no possibility that this part will open during burial work, and work efficiency is good. Further, even when a large load is applied from above the seat pipe after embedment, there is no problem that the joint portion is detached. In addition, after embedding, since the formation is approaching on both sides of the seat pipe, there is no space where the pipe can be expanded in this direction. Accordingly, the seam portion does not come off from this point, and the cylinder shape can be stably maintained even when passing through the tillage machine.

According to the sheet pipe forming apparatus of the sixth aspect of the present invention, the same effect as that of the fifth aspect of the present invention is obtained.

(A) And (b) is the top view of the sheet | seat for seat pipes which concerns on the 1st Embodiment of this invention, respectively, and the external view after shaping | molding. It is a top view of the sheet | seat for seat pipes which concerns on the modification in the 1st Embodiment of this invention. (A) is the strength test result of the sheet | seat for seat pipes concerning the 1st Embodiment of this invention, (b) thru | or (e) is a schematic diagram of a cross section, respectively. It is a top view of the seat pipe forming apparatus which concerns on the 2nd Embodiment of this invention. It is a top view of the seat pipe forming apparatus which concerns on the modification in the 2nd Embodiment of this invention. (A) And (b) is a top view of the 1st guide part in the seat pipe forming apparatus which concerns on the 2nd Embodiment of this invention, respectively, (c) is an AA line arrow view in (a). It is sectional drawing. (A) thru | or (d) is a side view before and behind operation | movement of the 1st guide part in the seat pipe shaping | molding apparatus based on the 2nd Embodiment of this invention, respectively, (b) is B in FIG. 6 (a). FIG. 6B is a view taken along line -B, and FIG. 6C is a view taken along line CC in FIG. 6B. It is a top view of the sheet | seat for seat pipes which concerns on a prior art.

The seat pipe seat of Example 1 according to the embodiment of the present invention will be described in detail with reference to FIGS. 1 to 3 (mainly corresponding to claims 1 to 4). In addition, about the component shown in FIG. 1, the same code | symbol is attached | subjected also in FIG. 2, and the description is abbreviate | omitted.
Fig.1 (a) and FIG.1 (b) are the top views and the external view after shaping | molding of the sheet | seat for seat pipes concerning the 1st Embodiment of this invention, respectively.

As shown in FIG. 1 (a), the seat pipe seat 1 of this embodiment has a plurality of small holes 3 formed in a flexible plastic plate 2 made of polyethylene having a thickness of 1 mm and spaced from each other by about 150 mm.

Parallel end portions

6a and 6b. The

end portions

6a and 6b are each provided with a plurality of tongue pieces 4 and incisions 5 in series at intervals of about 10 mm, and the incisions 5 are provided at positions corresponding to the tongue pieces 4. .
The tongue piece 4 includes a substantially triangular insertion portion 4a and

notches

4b and 4b at positions corresponding to both ends of the substantially triangular base. Moreover, the notch part 5 is provided in order to insert the tongue piece part 4, and comprises the substantially radial shape enclosed by the circular arc 5a and the string 5b. The arc 5a is located closer to the end 6b, and the string 5b is parallel to the end 6b. The maximum width of the insertion portion 4a is shorter than the inner circumference of the arc 5a and wider than the maximum width of the string 5b.
As shown in FIG. 1B, when the seat pipe sheet 1 is curved so that the end portion 6a and the end portion 6b face each other, and the seam 6 is formed by bringing them into close proximity, the seat pipe seat 1 is formed. Has a cylindrical shape with a diameter of approximately 50 mm. In the joint 6, the end 6a covers the end 6b from above. Further, the tongue piece 4 is inserted into the notch 5.

Next, a modification of the first embodiment will be described with reference to FIG. FIG. 2 is a plan view of a seat pipe seat according to a modification of the first embodiment of the present invention.
As shown in FIG. 2, the seat pipe sheet 1 a according to the modification of the present embodiment is obtained by replacing the notch portion 5 in the seat pipe sheet 1 with the notch portion 7. The cut portion 7 is provided for inserting the tongue piece portion 4 in the same manner as the cut portion 5, and has a substantially T-shape in which the vertical image 7b is combined with the horizontal image 7a. The vertical image 7b is located closer to the end 6b, and the horizontal image 7a is parallel to the end 6b. Note that the maximum width of the insertion portion 4a is wider than the width of the horizontal image 7a.
Other configurations are the same as those of the seat pipe seat 1 according to the first embodiment.

Next, the operation of the seat pipe seat 1 according to the present embodiment will be described.
In the seat pipe seat 1 of the present embodiment, the maximum width of the insertion portion 4a is shorter than the inner circumference of the arc 5a and wider than the maximum width of the string 5b, so the insertion portion 4a is in a flat plate state. In this case, the tongue piece portion 4 is not completely inserted into the cut portion 7. Therefore, when the pressurization is performed from above the insertion portion 4 a after forming the joint 6, the insertion portion 4 a is curved and inserted into the cut portion 5 along the inner periphery of the arc 5 a. If the pressurization is continued as it is, the

notches

4b and 4b come into contact with both ends of the string 5b. When the pressurization is stopped thereafter, the curved insertion portion 4a returns to the original flat state, the

notches

4b and 4b are locked to both ends of the string 5b, and the tongue piece 4 and the notch 5 are It has the effect of becoming difficult to separate from each other. In addition, since the several tongue piece part 4 and the notch part 5 are in series with the joint 6, respectively, when a pressure is continuously applied along the joint 6, the joint 6 will be connected over the whole. And has the effect that a complete cylindrical seat pipe is formed.
On the other hand, after connecting the joint 6, the tongue piece 4 and the notch 5 are deformed in addition to being pressed again, and when the ends 6 a and 6 b are pulled in the direction of separating from each other, the tongue piece 4 is cut off. It has the effect | action that it becomes possible to pull out from the insertion part 5. FIG.
In addition, since the end 6 a is covered with the end 6 b at the joint 6, the tongue piece 4 is inserted into the cut portion 5 from above. Accordingly, when a load is applied to the joint 6 from above, the tongue piece portion 4 enters more deeply into the notch portion 5, and thus the joint 6 has an effect that it is difficult to disengage. This operation will be described in detail below.

Next, the operation of the joint portion when a load is applied will be described.
FIG. 3A shows the strength test result when the position of the joint portion is changed in the seat pipe seat according to the first embodiment of the present invention. FIG. 3B to FIG. ) Is a schematic diagram of a transverse section.
In FIG. 3 (a), the horizontal axis is the pressure (kN / m ² ) applied from vertically above the seat pipe seat 1, and the vertical axis is the diameter along the vertical direction of the seat pipe seat 1 due to this pressure. Crushing amount (mm). The crushing amount was measured by changing the position of the joint 6 for the flexible flat plate 2 having a thickness of 0.7 mm and a thickness of 1.0 mm.
The position of the joint 6 is represented by an angle θ formed by the joint 6 and the vertical direction. With reference to the angle θ when the joint 6 is positioned upward along the vertical direction, as shown in FIGS. 3B to 3D, the angles θ = 0 degrees, 90 degrees, 180 degrees. At any angle, the tongue piece 4 is inserted into the notch 5 from above at the joint 6. Further, as a comparative example, as shown in FIG. 3 (e), when the tongue piece portion 4 in the prior art is inserted into the cut portion 5 from below, the amount of crushing at an angle θ = 90 degrees is measured. Went.

As shown in FIG. 3A, the curves a to c and g are all measured values for the flexible flat plate 2 having a thickness of 0.7 mm, and the positions of the joints 6 are respectively upward (see FIG. 3B). ), Side (see FIG. 3C), down (see FIG. 3D), and side (see FIG. 3E). Among these, the curve g is a comparative example.
Curves d to f and h are measured values for the flexible flat plate 2 having a thickness of 1.0 mm, and the position of the joint 6 is above (see FIG. 3B) and side (see FIG. c)), downward (see FIG. 3D), and side (see FIG. 3E). Among these, the curve h is a comparative example. In the curves g and h, when the pressure is 0 kN / m ² , the crushing amount is already generated by about 10 mm because it is crushed by its own weight at 90 degrees.
Line i indicates earth pressure, and line j indicates a load applied by a bulldozer used for work when the seat pipe seat 1 is installed in the ground or a tractor used when working on the ground after installation. Yes, the size (the length of the arrow) depends on the weight of heavy machinery and the depth of the ground where the seat pipe is installed.
According to the curves g and h, when the earth pressure i (about 7 (kN / m ² )) is applied, the crushing amount is about 10 mm to 17 mm, and the seat pipe is crushed when buried in the soil. Can understand.
According to curves a to c, when the pressure is about 7 (kN / m ² ), almost no crushing amount occurs, and the seat pipe does not crush when buried in the soil. It is shown. These curves a to c are always distributed below the curve g of the comparative example related to the flexible plate 2 having the same thickness of 0.7 mm at the earth pressure level. In the case of being inserted from above, a higher strength is exhibited than in the case of being inserted from below.
However, considering the loading load j, the amount of crushing may increase depending on the size, and the seat pipe may crush in the ground. Therefore, the flexible flat plate 2 having a thickness of 1.0 mm as shown by the curves d to f is dominant. In the curves d to f regarding the flexible flat plate 2 having a thickness of 1.0 mm, the crushing amount is hardly generated even when the pressure is about 20 (kN / m ² ), and the heavy machine passes through the ground on the embedded seat pipe. The possibility of crushing the seat pipe is low. These curves d to f are always distributed below the curve h of the comparative example with respect to the same 1.0 mm-thick flexible flat plate 2, and even in the 1.0 mm-thick flexible flat plate 2, When 4 is inserted into the cut portion 5 from above, high strength is exhibited.
It can also be understood that the sheet thickness needs to be changed depending on the load.

Further, the operation of the seat pipe seat 1a according to a modification of the present embodiment will be described.
In the seat pipe seat 1a of the present embodiment, the maximum width of the insertion portion 4a is wider than the width of the horizontal image 7a, so that the tongue is the same as in the case of the notch portion 5 according to the first embodiment. The piece 4 is not completely inserted into the notch 7. Therefore, when a pressure is applied from above the insertion portion 4a after the joint 6 is formed, the right angle portion at the intersection of the horizontal image 7a and the vertical image 7b is pressed by the curved insertion portion 4a. As a result, the right-angled portion is bent and the cut portion 7 is deformed into an arc shape similar to that of the cut portion 5. In addition, since the length of the horizontal image 7a and the vertical image 7b is designed so that the inner periphery of this circular arc shape is wider than the maximum width of the insertion portion 4a, the insertion portion 4a is curved and cut into the cut portion 7. It has the effect of being inserted. When the pressurization is further continued, the

notches

4b and 4b are in contact with both ends of the horizontal image 7a. Then, when the pressurization is stopped, the

notches

4b and 4b are locked to both ends of the horizontal image 7a, and the tongue piece 4 and the notch 7 have a function of being difficult to separate from each other.
Other operations are the same as those of the seat pipe seat 1 according to the first embodiment.

As described above, according to the seat pipe seat 1 of the present embodiment, since it is inserted into the cut portion 5 by applying pressure from above the tongue piece portion 4, the end portion 6a and the end portion are easily provided. 6b can be connected. Accordingly, since the incompletely connected portion does not occur, the joint 6 does not come off, and the seat pipe seat 1 can be surely made cylindrical.
When the pressurization is stopped, the

notches

4b and 4b are locked to both ends of the string 5b and become difficult to be separated from each other. Therefore, the joint 6 is firmly connected, and the joint 6 is connected during the burying operation. There will be no detachment. Moreover, since the tongue piece part 4 is inserted from the upper part with respect to the notch part 5, and the joint 6 exhibits pressure resistance much higher than earth pressure, it has a good drainage function withstanding long-term use after embedding. Can be maintained.
Further, since the tongue piece portion 4 can be pulled out from the notch portion 5 by pressurizing again after connecting the joint 6, the seat pipe seat 1 can be freely and easily formed into a cylindrical shape. Or it can form in either sheet form.

Further, the effect of the seat pipe seat 1a according to the modification of the present embodiment will be described.
According to the seat pipe seat 1 of the present embodiment, the tongue piece portion 4 and the notch portion 7 are difficult to separate from each other due to pressurization and stoppage of the joint 6, so that the joints can be easily connected. The eyes 6 can be reliably connected.
Other effects are the same as those of the seat pipe seat 1 according to the first embodiment.

The structure of the seat pipe seat according to the present invention is not limited to that shown in this embodiment. For example, the interval between the tongue piece 4 and the

notches

5 and 7 may be other than 10 mm. Further, the interval between the

end portions

6a and 6b of the seat pipe sheet may be other than 150 mm, and the thickness thereof may be other than 1 mm.

The sheet pipe forming apparatus of Example 2 according to the embodiment of the present invention will be described in detail with reference to FIGS. 4 to 7 (mainly corresponding to claims 5 and 6). The components shown in FIGS. 1 and 2 are denoted by the same reference numerals in FIGS. 4 to 7 and description thereof is omitted.
FIG. 4 is a plan view of a seat pipe forming apparatus according to the second embodiment of the present invention.

As shown in FIG. 4, the seat pipe forming apparatus 8 of the present embodiment includes a sheet winding unit 10 installed in series along the long axis direction of a base 9 that is a plate material having a substantially rectangular shape, and an introduction unit 11. And a first guide portion 16, a second guide portion 19, and a third guide portion 21. The size of the base 9 is about 800 mm × 150 mm.
The sheet winding portion 10 has a pair of holding

frames

10a, 10a each having an arc shape, and ends fixed to the pedestal 9 by fixing

screws

10c, 10c, respectively, and attached between the uppermost portions of the holding

frames

10a, 10a. The wound body of the seat pipe seat 1 is rotatably held by the shaft 10b. On the other hand, the end of the holding frame 10a on the opposite side across the holding shaft 10b is similarly fixed to the base 9 by a fixing screw 10c (not shown). That is, the

end portions

6 a and 6 b of the seat pipe seat 1 are arranged and supplied to the side portions of the introduction portion 11. The seat pipe seat 1 is guided in the direction of the introduction portion 11 by a force (arrow Y in the drawing) that pulls the seat pipe seat 1 in the major axis direction.

The introduction portion 11 includes an inlet opening end 12a for introducing the seat pipe sheet 1 along the longitudinal direction thereof, an outlet opening end 12b for sending out the introduced sheet pipe sheet 1, and an outlet opening from the inlet opening end 12a. It is comprised from a pair of wing |

blade part

13a, 13b which has a clearance gap between the upper surfaces between the ends 12b, and the inclined surface 14 provided in a bottom face in the same range. Among these, since the width | variety of the inlet opening end 12a is larger than the outlet opening end 12b, the wing |

blade parts

13a and 13b are diameter-reduced toward the outlet opening end 12b. Further, the

wing portions

13a and 13b are each formed in a trumpet shape, and the curvature of the wing portion 13a on the side where the tongue piece portion 4 is introduced is larger than the curvature of the 13b on the side where the cut portion 5 is introduced. ing. Further, the inclined surface 14 has a structure raised by a pillow portion 15 a provided at one end of the support plate 15 in order to prevent the seat pipe seat 1 from bending downward.

Next, the first guide portion 16 is supported by the support plate 15 attached to the pedestal 9, and passes through the passage hole portion 17 through which the seat pipe seat 1 fed out from the outlet opening end 12b passes. In this case, a vertical rotating roller 18 is provided to press the seat pipe seat 1 from above (arrow Z in the figure). The vertical rotation roller 18 is adjusted so that the ceiling portion of the passage hole portion 17 is the center of the rotation axis, and the position in the width direction is pressed against the joint 6.

Subsequently, the second guide portion 19 is supported by the support plate 15 and is provided with a first annular hole 20 through which the seat pipe seat 1 that has passed through the passage hole portion 17 is passed. The first annular hole 20 has a diameter smaller than the diameter of the passage hole portion 17. Therefore, the seat pipe seat 1 has a structure that receives pressure (arrow X _{1 in the} figure) that is reduced in diameter from the left and right ends when passing through the first annular hole 20. Accordingly, the seat pipe seat 1 fed out from the first annular hole 20 is formed into a substantially cylindrical shape.

Further, the third guide portion 21 is supported by the support plate 15 and is provided with a second annular hole 22 through which the seat pipe seat 1 that has passed through the first annular hole 20 is passed. The second annular hole 22 has a smaller diameter than the diameter of the first annular hole 20. Therefore, the seat pipe seat 1 has a structure that receives pressure (arrow X _{2 in the} figure) that is reduced in diameter from the left and right ends when passing through the second annular hole 22. The seat pipe seat 1 that has passed through the second annular hole 22 is formed into a seat pipe 23 having a complete cylindrical shape.

Next, a modification of the second embodiment will be described with reference to FIG. FIG. 5 is a plan view of a seat pipe forming apparatus according to a modified example of the second embodiment of the present invention.
As shown in FIG. 5, a seat pipe forming apparatus 8 a according to a modification of the present embodiment is provided with a pair of horizontal

rotating rollers

24 and 24 instead of the second guide portion 19 of the sheet pipe forming apparatus 8. The horizontal

rotating rollers

24 and 24 rotate about the

rotation shafts

25 and 25 supported by the support plate 15 and suspended by the suspension member 26, respectively. The seat pipe seat 1 passes through the gap between the rotary shaft 25 and the rotary shaft 25. The distance of this gap is smaller than the diameter of the passage hole portion 17. Therefore, the seat pipe seat 1 has a structure that receives pressure (arrow X _{3 in the} figure) that is reduced in diameter from the left and right ends when passing through the gap between the rotary shaft 25 and the rotary shaft 25.
Other configurations are the same as those of the seat pipe forming apparatus 8 according to the second embodiment.

Next, the operation of the seat pipe forming apparatus according to the second embodiment will be described.
One sheet pipe sheet 1 is pulled out from the wound body of the sheet pipe sheet 1 held by the holding shaft 10b by the force in the direction indicated by the arrow Y in FIG. 4, and a pair of

wing portions

13a, 13b is formed from the inlet opening end 12a. To be introduced. Since the

wing portions

13a and 13b are each formed in a trumpet shape, the

end portions

6a and 6b are respectively curved upward. Further, the

wing portions

13a and 13b are reduced in diameter toward the outlet opening end 12b, and the wing portion 13a is larger than the curvature than 13b. Therefore, the end portion 6a always covers the end portion 6b from above. It overlaps so that it may cover, and it has the effect | action that the joint 6 begins to be formed. Since the

end portions

6a and 6b are respectively provided with the tongue piece portion 4 and the notch portion 5, the tongue piece portion 4 is cut when the vertical rotation roller 18 is pressed from above (arrow Z in FIG. 4). It starts to be inserted into the insertion portion 5 from above.

Next, the action when the tongue piece 4 is inserted into the notch 5 will be described in detail with reference to FIGS. 6 and 7. 6 (a) and 6 (b) are plan views of the first guide portion in the seat pipe forming apparatus according to the second embodiment of the present invention, respectively, and (c) is an A- It is A line arrow sectional drawing.
6A and 6C, the

end portions

6a and 6b of the seat pipe seat 1 according to the first embodiment are fed into the first guide portion 16. At this time, since the end 6a is mainly pressed against the vertical rotation roller 18 among the

ends

6a and 6b, the insertion portion 4a is mainly bent in a direction protruding downward. The insertion portion 4a has a width that is shorter than the arc 5a and substantially coincides with the inner circumference of the arc 5a. Therefore, the insertion part 4a has the effect | action that it deform | transforms into the shape which is easy to approach into the circular arc 5a about the width direction.
In FIG. 6B, the

end portions

6 a and 6 b of the seat pipe seat 1 a according to the modification of the first embodiment are fed into the first guide portion 16. At this time, since the portions pressed against the vertical rotation roller 18 are the insertion portion 4a and the vertical image 7b, the insertion portion 4a and the vertical image 7b are bent in a direction protruding downward. Accordingly, the right angle portion at the intersection of the horizontal image 7a and the vertical image 7b is pushed, and the right angle portion is bent and deformed into an arc shape similar to the arc 5a in the first embodiment. Therefore, the insertion part 4a has the effect | action that it is deform | transformed by the shape which is easy to approach into the circular arc generate | occur | produced by deformation | transformation about the width direction.

FIGS. 7A to 7D are side views before and after the operation of the first guide portion in the seat pipe forming apparatus according to the second embodiment of the present invention, respectively, and FIG. FIG. 6B is a view taken along the line BB in FIG. 6C, and FIG. 6C is a view taken along the line CC in FIG.
As shown in FIG. 7A, immediately before compression by the vertical rotating roller 18, the cut portion 5 overlaps below the tongue piece portion 4. At this time, since the arc 5a and the string 5b exist at the same height, the cut portion 5 is not expanded in the height direction. Next, as shown in FIG. 7B, when the compression is started, the insertion portion 4a is bent downward and comes into contact with the arc 5a. As a result, the end 6b is also bent downward, and the arc 5a moves below the string 5b. Therefore, the notch part 5 will expand about a height direction.
Further, as shown in FIG. 7C, immediately before compression, the horizontal image 7a and the vertical image 7b exist at the same height, and the cut portion 7 is not expanded in the height direction. However, as shown in FIG. 7D, when the insertion portion 4a is bent downward due to compression, the tip of the insertion portion 4a comes into contact with the vertical image 7b, and the vertical image 7b is bent downward. Therefore, the cut portion 7 expands in the height direction.
Thus, since the

notch parts

5 and 7 are expanded also about a height direction, it has the effect | action that the tongue piece part 4 is inserted easily. And the tongue piece part 4 is inserted in the

notch parts

5 and 7, and the sheet | seat 1 for seat pipes is deform | transformed by the substantially cylindrical shape which has a slight clearance gap upwards.

Next, referring again to FIG. 4, the seat pipe seat 1 deformed into a substantially cylindrical shape is reduced in diameter when passing through the first annular hole 20. 5 is pushed deeper. The seat pipe sheet 1 is sent in the direction of arrow Y in the figure, whereby a plurality of serial tongue portions 4 are sequentially pushed into a plurality of serial cut portions 5 corresponding thereto.
Further, the substantially cylindrical seat pipe seat 1 is reduced in diameter when passing through the second annular hole 22 so that the

notches

4b and 4b are in contact with both ends of the string 5b. At this time, the seam 6 is completely connected to complete the cylindrical seat pipe 23.
Further, the passage direction of the seat pipe 23 is ensured by passing through the first guide portion 16 to the third guide portion 21. That is, the longitudinal direction of the base 9 reflects the burying direction of the seat pipe 23.

Furthermore, the operation of the seat pipe forming apparatus 8a according to a modification of the present embodiment will be described. Since the seat pipe seat 1 is reduced in diameter from the left and right ends when passing through the gap between the rotary shaft 25 and the rotary shaft 25, the tongue piece portion 4 is pushed deeper into the notch portion 5.
Other operations are the same as those of the seat pipe forming apparatus 8 according to the second embodiment.

As described above, according to the sheet pipe forming apparatus 8 of the present embodiment, the sheet pipe sheet 1 drawn out from the sheet winding portion 10 passes through the

wing portions

13a and 13b, and is then applied to the vertical rotating roller 18. Since the tongue piece portion 4 is inserted into the cut portion 5 from above by being pressed, the joint 6 can always exhibit high strength.
Further, since the insertion portion 4a having a shape substantially coincident with the inner circumference of the arc 5a by the vertical rotation roller 18 is easily inserted into the

cut portions

5 and 7 extended in the height direction, the end portion 6a is surely secured. And the end 6b can be connected. Furthermore, since the insertion part 4a does not collide with the inner periphery of the

notch parts

5 and 7, damage to the

notch parts

5 and 7 can also be avoided.
Further, since there is no member that presses the joint 6 from above after the first guide portion 16, there is no possibility that the joint 6 will be reopened during the burying operation, and the operation can be completed quickly. Further, since the longitudinal direction of the pedestal 9 reflects the burying direction of the seat pipe 23, if the pedestal 9 is installed along a desired direction, the seat pipe 23 can be accurately embedded along this direction. .
As described above, according to the seat pipe forming apparatus 8, the seat pipe 23 can be formed automatically and quickly, so that the working efficiency can be greatly improved as compared with the prior art, and the finished product Higher transport efficiency and lower cost installation than transporting and burying pipes. Further, since the size of the base 9 is about 800 mm × 150 mm, the seat pipe forming apparatus 8 is generally compact and can be easily carried. Therefore, the burden is light in the movement for sequentially burying the plurality of seat pipes 23. Furthermore, since the seat pipe forming apparatus 8 does not have a portion that is driven by electric power, a power source is unnecessary. Therefore, the seat pipe forming apparatus 8 is highly convenient because an installation place is not selected in a vast cultivated land.

Next, the effect of the seat pipe forming apparatus 8a according to a modification of the present embodiment will be described. The seat pipe forming device 8a has the same effect as the seat pipe forming device 8 according to the first embodiment.

In addition, the structure of the seat pipe forming apparatus of the present invention is not limited to that shown in this embodiment. For example, the third guide portion 21 may not be provided. Moreover, the base 9 is not limited to the thing of the size mentioned above.

As described above, the invention described in claims 1 to 6 of the present invention is used as a seat pipe sheet used for a seat pipe that is embedded in a formation and that guides or drains groundwater and a molding apparatus thereof. Is possible.

DESCRIPTION OF SYMBOLS 1 ... Sheet pipe sheet 1a ... Sheet pipe sheet 2 ... Flexible flat plate 3 ... Small hole 4 ... Tongue piece part 4a ... Insertion part 4b ... Notch part 5 ... Notch part 5a ... Arc 5b ... String 6 ... Joint 6a ... end 6b ... end 7 ... notch 7a ... horizontal picture 7b ... vertical picture 8 ... sheet pipe forming device 8a ... sheet pipe forming device 9 ... pedestal 10 ... sheet winding part 10a ... holding frame 10b ... holding shaft 10c ... fixing screw 11 ... introduction part 12a ... inlet opening end 12b ... outlet opening end 13a ... wing part 13b ... wing part 14 ... inclined surface 15 ... support plate 15a ... pillow part 16 ... first guide part 17 ... passage hole part 18 ... vertical rotating roller 19 ... second guide part 20 ... first annular hole 21 ... third guide part 22 ... second annular hole 23 ... sheet pipe 24 ... horizontal rotating roller 25 ... rotating shaft 26 ... suspension material 27 ... Strip-shaped plastic sheet 28 ... Base material 29 Small holes 30a ... seam edge 30b ... seam edge 31 ... Gyakutomeshitahen 32 ... Gyakutomeana 32a ... check for notch

Claims

A seat pipe seat for use in a seat pipe for guiding or draining groundwater by forming a flexible flat plate (2) made of a synthetic resin having a plurality of small holes formed into a cylindrical shape and embedded in a formation. ,
Of the end portions of the seat pipe sheet, a pair of parallel end portions (6a, 6b) form a joint portion (6) when formed into a cylindrical shape, and one of the end portions (6a). The tongue portion (4) provided with an insertion portion (4a) and a notch portion (4b) whose width is smaller than that of the insertion portion (4a) is formed in series at a predetermined interval, and the other end portion (6b) is provided with a plurality of incisions (5) in series with the plurality of tongue pieces (4),
When the tongue piece (4) and the cut portion (5) are bent from each other and the tongue piece portion (4) is inserted from above the cut portion (5) and formed into a cylindrical shape, A seat pipe seat characterized in that the outer periphery of the insertion portion (4a) of the bent tongue portion (4) can be inserted along the inner periphery of the cut portion (5). (1).
The seat pipe seat (1) according to claim 1, wherein the cut portion (5) has an arc shape forming an arc (6a) on the other end portion (6b) side.
The seat pipe seat (1a) according to claim 1, wherein the cut portion (7) has a T shape that forms a vertical image (7b) on the other end portion (6b) side.
The maximum width of the insertion part (4a) of the tongue piece part (4) is wider than the maximum width of the notch part (5), according to any one of claims 1 to 3. Seat pipe seat.
An apparatus for introducing a seat pipe for a seat pipe according to any one of claims 1 to 4 to form a seat pipe,
A seat winding part (10), an introduction part (11), and a first guide part (16) installed in series in the longitudinal direction on the pedestal (9) via supports (10a to 10c) And a second guide part (19),
The sheet winding part (10) winds and holds the sheet pipe sheet so that the tongue piece part (4) and the notch part (5) of the sheet pipe sheet are respectively formed on the side parts. And supplying the seat pipe seat to the introduction section (11),
The introduction part (11) has an inlet opening end (12a) for introducing the seat pipe sheet along its longitudinal direction, and an outlet opening end (12b) for feeding out the introduced sheet pipe sheet, A pair of wings facing each other while reducing the diameter from the inlet opening end (12a) toward the outlet opening end (12b) with a gap in the upper part, wherein the tongue pieces (4) of the seat pipe seat ) Is inserted from above the notch (5) and formed into a cylindrical shape so that the curvature of the wing (13a) on the tongue piece (4) side is the wing on the notch (5) side ( A pair of trumpet-shaped wings (13a, 13b) having a larger curvature than 13b),
The first guide portion (16) is a passage hole portion (17) that allows the sheet pipe sheet curved and fed from the outlet opening end (12a) to pass therethrough and is formed into a cylindrical seat pipe (23). And a vertical rotation roller (18) that presses the sheet pipe seat from above,
The second guide portion (19) includes an annular hole (20) having a diameter smaller than that of the passage hole portion (17) and allowing the cylindrical seat pipe (23) to pass therethrough. A sheet pipe forming apparatus (8).
Instead of the second guide portion (19), a pair of horizontal rotating rollers (24, 24) that contact both side surfaces of the cylindrical sheet pipe (23) that has passed through the first guide portion (16). The seat pipe forming device (8a) according to claim 5, characterized in that is provided.