JP5663408B2 - Groove forming device - Google Patents

Description

  The present invention relates to a groove forming apparatus, and more particularly to a groove forming apparatus for forming a groove for burying a culvert tube in the ground of a farm field or the like.

  Conventionally, when burial pipes (underdrain drainage pipes) for forming drainage culverts in poorly drained land have been dug and formed by trenchers corresponding to the pipe outer diameter. It has been broken. This trencher spans a chain with multiple cutting blades between the upper drive wheel and the lower guide roller, and rotates the chain to cut the earth and sand with the cutting blade to form a groove. And it has the structure which discharges the cut earth and sand outside a groove | channel (for example, refer patent document 1).

Japanese Patent Laid-Open No. 10-252097

  However, depending on the soil, even if a narrow groove is formed, the wall surface of the groove may collapse, and the depth of the groove will not be constant due to the collapsed earth and sand, and it will not be possible to bury the underdrain pipe as it is .

  Accordingly, an object of the present invention is to provide a groove forming apparatus capable of easily and reliably forming a groove for burying a culvert tube even when the wall surface of the groove is easily broken.

To achieve the above object, the groove forming equipment of the present invention, there is provided a groove forming apparatus for forming a groove for embedding the underdrain pipes in the ground, the groove width corresponding to the underdrain pipe for underdrain pipe laying A narrow groove forming portion that forms a narrow groove and a wide groove forming portion that forms a wide groove wider than the narrow groove, the wide groove forming portion being open toward the wide groove forming direction. A wide earth and sand approaching portion; a work machine mounting portion provided at an upper portion of the wide earth and sand approaching portion; and an earth and sand storage portion provided continuously behind the wide groove forming direction of the wide earth and sand approaching portion. The earth and sand entering portion has a groove bottom forming portion that forms the bottom surface of the wide groove, and a pair of groove wall forming portions that rise from both ends in the groove width direction of the groove bottom forming portion to form both wall surfaces of the wide groove. The earth and sand reservoir is gradually narrower toward the rear of the earth and sand reservoir after the groove bottom forming part. After closing the bottom plate, the pair of side plates whose gaps are gradually narrowed toward the rear of the sediment storage portion, and the rear end portions of the bottom plate and the pair of side plates in the wide groove forming direction. And the rear wall is formed in a flat plate shape along the bottom surface of the wide groove formed by the wide groove forming portion when the narrow groove is formed after the wide groove is formed, The rear wall is provided in a state of projecting rearward in the wide groove forming direction, and the narrow earth and sand entering portion opened toward the narrow groove forming direction, and the earth and sand entering from the narrow earth and sand entering portion to the earth and sand storing portion. And a guide part that feeds into the sediment storage part through an opening provided on the rear wall, and a lid plate that opens and closes the opening.

  According to the groove forming apparatus of the present invention, a narrow groove for laying a culvert tube can be formed on the bottom surface of the wide groove, so that the depth of the narrow groove can be reduced, and the wall surface of the narrow groove Can be prevented from collapsing. Therefore, the culvert tube can be buried in a state set in advance in the narrow groove.

It is a front view which shows the attitude | position at the time of wide groove | channel formation in the groove | channel forming apparatus which shows the 1st example of this invention. It is II-II sectional drawing of FIG. It is a front view which similarly shows the attitude | position at the time of narrow groove | channel formation. It is IV-IV sectional drawing of FIG. It is explanatory drawing which similarly shows an example of a use condition. It is a front view which similarly shows the state at the time of wide groove | channel formation. It is a front view which similarly shows the state at the time of narrow groove formation. It is sectional drawing which shows the state which laid the culvert tube in the groove | channel formed similarly. It is a partial cross section side view of the groove forming apparatus which shows the 2nd form example of this invention. It is also a front view.

  As shown in FIG. 5, for example, the groove forming apparatus 11 shown in the first embodiment of FIGS. 1 to 8 includes a tip of a work arm 13 of a backhoe 12, a lower portion of a bulldozer discharge plate, and a tractor. FIG. 8 shows a predetermined position of the agricultural field 14 that is detachably attached to appropriate positions of various work machines and that is driven by a work machine such as the backhoe 12 or that the work arm 13 is operated. As described above, the groove 16 for embedding the culvert tube 15 is formed, and the groove forming device 11 is formed in an appropriate shape as necessary depending on conditions such as an attachment state and an attachment position to the working machine. It is attached to the work machine through the attached attachment.

  The groove forming device 11 forms a narrow groove forming portion 21 that forms a narrow groove 16a for laying a dark pipe with a groove width corresponding to the underdrain pipe 15, and a wide groove 16b that is wider than the narrow groove 16a. And a wide groove forming portion 22. The wide groove forming portion 22 includes a wide earth and sand entering portion 23 that opens in the forming direction of the wide groove 16 a, a work implement attaching portion 24 provided on the upper portion of the wide earth and sand entering portion 23, and the wide earth and sand entering portion 23. The earth and sand storage part 25 provided continuously in the rear of the wide groove forming direction is provided. The wide earth and sand entering portion 23 has a groove bottom forming portion 26 that forms the bottom surface of the wide groove 16b, and a pair of walls that rise from both ends in the groove width direction of the groove bottom forming portion 26 to form both wall surfaces of the wide groove 16b. Groove wall forming portions 27, 27.

  The earth and sand reservoir 25 continues to the groove bottom forming part 26 and continues to the bottom plate 28 having a shape gradually narrowing toward the rear of the earth and sand reservoir 25 and the pair of groove wall forming parts 27 and 27. And a pair of side plates 29 arranged so that the distance gradually decreases toward the rear of the earth and sand reservoir 25, and a rear wall 30 that closes the rear ends of the bottom plate 28 and the pair of side plates 29 in the wide groove forming direction. ing. The rear wall 30 has a flat plate shape in the direction along the bottom surface of the wide groove 16b formed by the wide groove forming portion 22 when forming the narrow groove 16a after forming the wide groove 16b. A curved portion 30a that is curved upward is formed at the distal end portion.

  The narrow groove forming portion 21 is provided in a state of protruding rearward with respect to the wide groove forming direction of the rear wall 30, and the narrow soil entering portion 31 opened toward the narrow groove forming direction; A guide portion 33 for guiding the sand and sand that has entered from the narrow sand and sand entrance portion 31 toward the sediment storage portion 25 and sending out the sediment into the sediment storage portion 25 through an opening 32 provided in the rear wall 30; A lid plate 34 for opening and closing the opening 32 is rotatably provided on the inner surface of the rear wall 30 on the earth and sand storage portion 25 side via a hinge 35.

  Further, in the wide groove forming portion 22, the wide groove forming direction front end portions of the groove wall forming portions 27, 27 and the narrow groove forming portion 21 of the narrow groove forming portion 21 in the groove forming direction front end portion are directed forward. Sharpened groove portions 36 and 37 are formed, respectively.

  When using the groove forming apparatus 11 having such a structure to form the groove 16 for embedding the culvert tube 15, as shown in FIG. 5, the tip of the work arm 13 of the backhoe 12 is connected via a connecting pin. The groove forming device 11 is mounted, and the wide groove 16b is formed first.

  When forming the wide groove 16b, as shown in FIGS. 1, 2, 5, and 6, the groove forming device 11 is in a state in which the wide earth and sand entering portion 23 is open toward the wide groove forming direction. The bottom plate 28 is positioned so as to be parallel to the bottom surface of the wide groove 16b to be formed. By moving the groove forming device 11 in this state in the wide groove forming direction, the wide groove 16b can be formed in the portion through which the wide earth and sand entering portion 23 has passed, as shown in FIG.

  At this time, the cover plate 34 is in a state in which the opening 32 is closed by its own weight, and the earth and sand that has entered the earth and sand storage part 25 from the wide earth and sand entry part 23 passes through the opening 32 and is behind the earth and sand storage part 25. Can be prevented from being discharged.

  After forming the wide groove 16b, the groove forming device 11 is set so that the outer surface of the rear wall 30 comes into contact with the bottom surface of the wide groove 16b with the curved portion 30a at the head, as shown in FIGS. Then, the groove forming device 11 is moved in the narrow groove forming direction. As a result, the earth and sand at the center of the bottom surface of the wide groove 16b enters the guide part 33 from the narrow earth and sand entering part 31, and the cover plate 34 of the opening 32 is automatically moved by the pressure of the earth and sand guided by the guide part 33. By opening, the earth and sand from the narrow earth and sand approach part 31 can be taken in the earth and sand storage part 25, and the narrow groove 16a can be formed in the part which the narrow groove formation part 21 passed.

  When forming the narrow groove, the narrow groove 16a is formed such that the outer surface of the rear wall 30 abuts the bottom surface of the wide groove 16b, whereby the depth of the narrow groove 16a can be made constant. Further, since the gap between the pair of side plates 29 becomes an inverted trapezoidal shape narrowing on the groove bottom side, the outer surface of the side plate 29 hardly hits the wall surface of the wide groove 16b formed earlier, and the wall surface of the wide groove 16b. Can be prevented from colliding with the side plate 29. Further, when the narrow groove forming portion 21 is formed in an inverted trapezoidal shape in which the narrow groove 16a is wide at the opening side and the bottom side is narrow when the narrow groove is formed, the wall surface of the narrow groove 16a is collapsed. Can be suppressed.

  9 and 10 show a second embodiment of the groove forming apparatus of the present invention. In addition, the same code | symbol is attached | subjected to the component same as the component of the groove forming apparatus in the said 1st form example, and detailed description is abbreviate | omitted.

  The groove forming apparatus in the present embodiment is an example in which the narrow sand entry portion 31 of the narrow groove formation portion 21 is continuously formed in the center of the tip of the bottom plate 28 below the wide sand entrance portion 23 in the wide groove formation portion 22. Is shown. In this way, by opening the wide sand and sand entrance portion 23 and the narrow soil and sand entrance portion 31 continuously in the vertical direction toward the groove forming direction of the groove 16, the groove forming device is moved in the groove forming direction. The narrow groove 16a can be formed at the narrow earth / sand entry portion 31 simultaneously with the formation of the wide groove 16b at the wide earth / sand entry portion 23.

  Also in this embodiment, the shape of the narrow groove forming portion 21 and the wide groove forming portion 22 is made to be an inverted trapezoidal shape in which the upper wall surface of the formed narrow groove 16a and wide groove 16b is expanded. It is possible to prevent the groove wall surface of the groove 16 from collapsing.

  As described above, by using the groove forming apparatus including the narrow groove forming portion 21 and the wide groove forming portion 22, the center of the bottom portion of the wide groove 16b having a deep groove for accommodating the buried depth of the underdrain pipe 15 is provided. In addition, it is possible to form a two-stage groove 16 having a narrow groove 16a having a shallow groove for laying the underdrain pipe 15, and even if the wall surface of the wide groove 16b having a deep groove and a large wall surface is broken. The collapsed earth and sand hardly fall into the narrow groove 16a, and the narrow groove 16a has a shallow groove so that the wall surface is hardly collapsed. Therefore, the culvert tube 15 can be easily and reliably laid on the bottom surface of the narrow groove 16a. Therefore, even in the case of a farm field having a soil quality in which the wall surface of the groove tends to collapse, the burial tube 15 can be buried efficiently and in a short period of time.

  Further, by providing a groove cutting portion with a sharpened tip at the front end portion in the groove forming direction of the narrow groove forming portion 21 and the wide groove forming portion 22, the earth and sand can be reliably cut into the inside and outside of the opening, Even when there is a lump of earth and sand, pebbles, or grass roots, a groove having a predetermined shape can be more reliably formed.

  When a predetermined amount of sediment has been stored in the sediment storage unit 25, the work arm 13 of the backhoe 12 may be operated to discharge the sediment in the sediment storage unit 25 around the groove, By providing a guide member for discharging the earth and sand in the earth and sand storage unit 25 to the outside in the vicinity of the rear wall 30 of the earth and sand storage unit 25 and a mechanism and mechanism for discharging the earth and sand mechanically, Long grooves can be formed continuously. Moreover, after laying the culvert tube 15 in the narrow groove 16a, it may be backfilled as usual.

  Further, the culvert pipe 15 is laid in the narrow groove 16a formed by the narrow groove forming portion 21 through an impermeable member 38 having an upper portion opened as indicated by an imaginary line in FIG. It is also possible to supply water and store it in the water-impermeable member 38 so that the water is supplied into the ground of the field by capillary action through the earth and sand above the water-impermeable member 38. At this time, the wide groove 16b is formed above the narrow groove 16a, and the narrow groove 16a and the wide groove 16b are filled with the backfilled earth and sand appropriately. Appropriate capillarity occurs not only in the earth and sand in the narrow groove 16a above 38, but also in the earth and sand in the wide groove 16b, so that effective underground irrigation can be performed over a wide range.

  DESCRIPTION OF SYMBOLS 11 ... Groove formation apparatus, 12 ... Backhoe, 13 ... Working arm, 14 ... Farm, 15 ... Underdrain pipe, 16 ... Groove, 16a ... Narrow groove, 16b ... Wide groove, 21 ... Narrow groove formation part, 22 ... Wide Groove forming part, 23 ... wide earth and sand approaching part, 24 ... work machine mounting part, 25 ... earth and sand storing part, 26 ... groove bottom forming part, 27 ... groove wall forming part, 28 ... bottom plate, 29 ... side plate, 30 ... rear wall , 30a ... curved portion, 31 ... narrow sand entry portion, 32 ... opening, 33 ... guide portion, 34 ... cover plate, 35 ... hinge, 36, 37 ... groove cut portion, 38 ... impermeable member

Claims (1)

A groove forming apparatus for forming a groove for burying a culvert pipe in the ground, the narrow groove forming section for forming a narrow groove for laying a culvert pipe corresponding to the culvert pipe, and the narrow width A wide groove forming portion that forms a wide groove wider than the groove, and the wide groove forming portion is provided on the wide earth and sand entering portion that opens in the wide groove forming direction, and on the upper portion of the wide earth and sand entering portion. A working machine mounting portion, and a sand storage portion provided continuously behind the wide groove forming direction of the wide earth and sand entering portion, wherein the wide earth and sand entering portion forms a groove bottom that forms a bottom surface of the wide groove. And a pair of groove wall forming portions that rise from both ends in the groove width direction of the groove bottom forming portion to form both wall surfaces of the wide groove, and the earth storage portion is continuous with the groove bottom forming portion. A bottom plate that gradually becomes narrower toward the rear of the sediment storage part and the pair of groove wall forming parts. A pair of side plates that gradually narrow toward the rear of the storage portion, and a rear wall that closes the rear ends of the bottom plate and the pair of side plates in the wide groove forming direction, the rear wall being narrow after the wide groove is formed. When the groove is formed, it is formed in a flat plate shape along the bottom surface of the wide groove formed by the wide groove forming portion, and the narrow groove forming portion is provided in a state of protruding rearward in the wide groove forming direction of the rear wall. The narrow sand and sand intrusion part opened toward the narrow groove forming direction, and the earth and sand entering from the narrow sand and sand entrance part are guided toward the earth and sand storage part, and the sand and sand are stored through the opening provided in the rear wall. A groove forming apparatus comprising: a guide portion that feeds into the portion; and a lid plate that opens and closes the opening portion.

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