JP2016156152A - Soil improvement construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a soil improvement construction machine capable of performing soil improvement by excavating deeper without making a work vehicle large-sized.SOLUTION: In a soil improvement construction machine 1 comprising a work vehicle 2 with an arm 7 operating by the drive of a cylinder and a ground agitation device 23 attached to the tip end of the arm 7, the ground agitation device 23 comprises a body device 25 for agitating a ground, a fitting part 30 attached to the tip end of the arm 7 to be rotatable and moving upward/downward by the drive of the cylinder, a long support body 24 having one end to which the body device 25 is fixed and having the other end attached to a support shaft 30a formed in the fitting part 30 to be rotatable, a rotation regulation part 40 for regulating the rotation of the long support body 24 against the fitting part 30 by engaging the fitting part 30 with the long support body 24 when the support shaft 30a is located at the lowermost part with respect to the tip end of the arm 7, and a lock part 50 which connects the fitting part 30 and the long support body 24 when the tip end of the arm 7 is inclined obliquely upward with respect to a horizontal direction at a prescribed angle.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a ground improvement machine that improves ground by stirring and mixing soil and soil improvement material while excavating the ground.

  FIG. 7 is a side view showing a conventional ground improvement machine 1. The ground improvement machine 100 is configured by attaching a ground stirring device 9 to a work vehicle 2 for various works. Here, the work vehicle 2 is a working machine that can be used for a hydraulic shovel, a dismantling device, or the like by exchanging attachments, and is a so-called backhoe.

  The work vehicle 2 includes a traveling unit 3, a main body unit 4 on which an operator gets on and performs various operations, a boom 5, a cylinder 6, an arm 7, a cylinder 8, and a cylinder 10.

  The traveling unit 3 is a so-called caterpillar and travels on the ground by an endless track. The main body 4 is provided rotatably on the traveling unit 3 and includes equipment for performing various operations for an operator to get on and operate the boom 5 and the arm 7. As for the boom 5, the rear-end part is rotatably fixed to a main-body part, and a front-end | tip part moves to an up-down direction. The arm 7 is pivotally supported at the tip of the boom 5 so as to be rotatable.

  The cylinders 6, 8, and 10 are actuators that expand and contract by hydraulic pressure, and include a cylindrical portion that stores pressure oil and a shaft portion that linearly reciprocates from the cylindrical portion by hydraulic pressure. One end of the cylinder 6 is rotatably attached to the main body 4, and the other end is rotatably attached to the center of the boom 5. One end of the cylinder 8 is rotatably attached to the center of the boom 5, and the other end of the cylinder 8 is rotatably attached to the tip of the boom 5. In the cylinder 10, a cylindrical portion of the cylinder 10 is rotatably attached to a rear end portion of the arm 7, and a central portion of an L-shaped connecting member 10 a is rotatably connected to a distal end portion of a branch shaft of the cylinder 10. ing. Further, one end of the connecting member 10 a is rotatably connected to a portion slightly rearward with respect to the tip of the arm 7.

  And the ground improvement machine 100 is comprised by the ground stirring apparatus 9 being pivotally supported by the front-end | tip part of the arm 7, and the other end part of the connection member 10a so that rotation is possible. The ground improvement machine 100 swings the ground agitating device 9 in the front-rear direction by expanding and contracting the cylinder 10 and rotates the main body 4 to rotate the arm 7.

  The ground stirring device 9 includes a support 12 extending in a rod shape, a stirring body 13 attached to the tip of the support 12, a spray nozzle (not shown) for discharging a soil conditioner, and the like. In addition, the support body 12 is comprised, for example with the steel material of predetermined plate | board thickness, and the stirring body 13 is equipped with many stirring blades rotated by a drive mechanism. As a result, the ground improvement machine 100 holds the ground stirring device 9 so as to be substantially upright with respect to the ground by driving the cylinders 6, 8, 10, and then rotates the stirring body 13 to excavate the ground. The ground stirring device 9 is moved up and down. At this time, the ground is improved by spraying a soil conditioner from a spray nozzle (not shown) and stirring and mixing with the soil.

  By the way, when improving the ground by moving the ground stirring device 9 up and down, if the total length of the ground stirring device 9 is increased, the ground can be improved to a deep depth. However, when the total length of the ground stirring device 9 is simply increased, it is necessary to increase the size of the traveling unit 3, the main body unit 4 and the like, and there is a problem that handling such as conveyance and operation becomes extremely difficult.

  In order to solve this problem, the ground is further deepened by adding another support to the support that connects the arm and the ground stirring device as in the technique described in Patent Document 1. A ground improvement machine that can be improved has been proposed.

JP 2013-2229 A

  However, in recent years, a ground improvement machine that can improve the ground to a deeper depth is desired. Here, like the technique described in Patent Document 1, it is conceivable to increase the number of supports added to the support. However, as the number of supports increases, the load on the work vehicle increases, so the number of supports that can be added is limited. If the number of supports is increased, it is necessary to increase the strength of the work vehicle. However, this leads to an increase in the size of the work vehicle, making it difficult to carry the work vehicle on the large vehicle and transport it to the construction site.

  An object of the present invention is to solve these problems, and to provide a ground improvement machine that can improve the ground by excavating deeper without increasing the size of the work vehicle.

  In order to achieve the above object, the present invention has the following configuration.

  (1) A work vehicle having an arm that operates by driving a cylinder, and a ground stirring device attached to the tip of the arm, and the ground stirring device is moved up and down by driving the cylinder, and the ground stirring device In the ground improvement machine, the ground stirring device includes a main body device for stirring the ground, a mounting portion rotatably connected to the tip of the arm, and moved up and down by driving the cylinder, and at one end portion. The main body device is fixed, and a long support body whose other end portion is rotatably connected to a support shaft formed on the attachment portion, and the attachment portion is rotated downward to move the support shaft. When the arm is positioned at the lowest position with respect to the tip of the arm, a part for restricting the rotation of the support relative to the attachment by engaging a part of the attachment with a part of the support. The dynamic regulation department, When the mounting portion is rotated upward and the tip of the arm is tilted upward by a predetermined angle with respect to the horizontal direction, a part of the mounting portion and a part of the support are engaged. Then, a ground improvement machine characterized by comprising a locking portion that connects the mounting portion and the support.

  According to (1), it becomes possible to lower the ground agitating device deeply by the amount by which the mounting portion is rotated downward. This makes it possible to excavate deeper and improve the ground without increasing the size of the work vehicle. In addition, it is possible to perform the rotation restriction of the support body in a state in which the support body can be turned with respect to the attachment portion according to the position of the tip of the arm by the rotation restriction portion or the lock portion. Thereby, a ground stirring apparatus can be moved along a ground.

  (2) In (1), the support body has an elongated hole in which the support shaft is inserted at the other end portion and extends along the support body, and the rotation restricting portion is the other end of the support body. A T-shaped protrusion protruding from the receiving part, and a receiving part that is formed between the support shaft in the mounting part and the connecting portion of the tip of the arm and protrudes in a cylindrical shape having an opening for inserting the protrusion; And the protrusion is opposed to the open portion and the attachment portion is lowered when the attachment portion is rotated downward and the support shaft is positioned at the lowest position with respect to the tip of the arm. When the support shaft is positioned at the lowest position of the long hole, the ground improvement machine is characterized in that the protrusion is positioned inside the receiving portion.

  (3) In (2), the lock portion includes an engagement piece extending from the vicinity of a portion of the receiving portion that contacts the support when the attachment portion is rotated upward, and the support A hook-shaped projecting piece that faces the engaging piece when the mounting portion is pivoted upward and brought into contact with the support, and the mounting portion is moved upward. The engaging piece engages with the protruding piece when it is rotated and brought into contact with the support, and the mounting portion is lowered and the support shaft is positioned at the lowest position of the long hole. A ground improvement machine.

  According to (2) and (3), the connection and connection of the two are made so that the rotation of the support relative to the mounting portion is regulated by the operation of the work vehicle without the operator directly touching the ground agitating device. It becomes possible to cancel.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the ground improvement machine which can excavate further deeply and improve a ground, without enlarging a working vehicle.

It is a side view which shows the ground improvement machine 1 of this invention. It is explanatory drawing which shows the operation | movement of the attachment part 30 vicinity of FIG. It is explanatory drawing which shows the operation | movement of the attachment part 30 vicinity of FIG. It is explanatory drawing which shows the use condition of the ground improvement machine 1 of this invention. It is explanatory drawing which shows the use condition of the ground improvement machine 1 of this invention. It is explanatory drawing which shows the use condition of the ground improvement machine 1 of this invention. It is explanatory drawing which shows the use condition of the conventional ground improvement machine 100.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a side view showing a ground improvement machine 1 according to an embodiment of the present invention. The ground improvement machine 1 is formed by attaching a ground stirring device 23 to a work vehicle 2. In addition, the same code | symbol is attached | subjected about the member same as the member in the conventional ground improvement machine 100 shown in FIG. 7, and detailed description is abbreviate | omitted.
The work vehicle 2 rotates the boom 5, the arm 7, and the ground stirring device 23 in the front-rear direction by driving the cylinders 6, 8, and 10 and moves the ground stirring device 23 up and down.

The ground stirring device 23 includes a long support 24, a main body device 25, a mounting portion 30, a rotation restricting portion 40, and a lock portion 50.
The long support 24 is made of one long columnar body made of SN steel, and the main body device 25 is fixed to one end. The other end of the long support 24 is formed in a U shape, and a long hole 24a is formed in each of a pair of wall surfaces forming the U shape. The long hole 24 a extends in the axial direction of the long support 24.
As for the main body apparatus 25, the whole is formed in columnar shape, and the stirring body 26 is provided in the front-end | tip. The main body 25 agitates the ground by driving the agitator 26 by the hydraulic motor 28 via the intermediate shaft 27. Moreover, the main body apparatus 25 injects a land improvement agent from the injection nozzle provided in this stirring body 26 side, and mixes with the soil under stirring.

  The attachment portion 30 is a substantially rectangular parallelepiped member having a rectangular surface close to a rectangle as a bottom surface, and one end portion in the longitudinal direction of the attachment portion 30 is the other end portion of the long support 24 formed in a U shape. Placed inside. The attachment portion 30 has a pair of support shafts 30a at one end. The pair of support shafts 30 a protrude from the planes facing the pair of wall surfaces at the other end of the long support 24, respectively. The pair of support shafts 30 a are inserted into a pair of long holes 24 a formed in the other end of the long support 24, so that the other end of the long support 24 rotates in the attachment portion 30. Connected freely.

  In addition, two corners at the other end of the attachment portion 30 are rotatably attached to the tip end portion of the arm 7 and the connecting member 10a by pins or the like. As a result, when the cylinder 10 is expanded and contracted, the mounting portion 30 swings in the vertical direction at the tip of the arm 7.

  The rotation restricting portion 40 includes a T-shaped protrusion 40a and a T-shaped protrusion receiving portion 40b. The T-shaped protrusions 40a are formed so as to protrude in a substantially T shape from the tips of a pair of wall surfaces forming a U-shape at the other end of the long support 24. The central portion of the T-shaped projection 40a is erected from the long support 24, and the tip of the T-shaped projection 40a is formed in an arc shape. The tip of the T-shaped protrusion 40a is formed to be an arc centered on the support shaft 30a when the support shaft 30a is located at the end of the long hole 24a on the T-shaped protrusion 40a side. ing.

  The T-shaped projection receiving portion 40b is a cylindrical projection that is formed at the center of both planes of the mounting portion 30 and has a sector shape when the support shaft 30a is viewed in the axial direction. The inner arc surface in the sector shape forming the T-shaped projection receiving portion 40b faces the support shaft 30a. When the support shaft 30a is viewed in the axial direction, the center of the arc inside the support shaft 30a and the T-shaped projection receiving portion 40b The T-shaped protrusion receiving portion 40b has a line-symmetric shape with respect to a virtual straight line connecting Further, the inner and outer arcs in the T-shaped protrusion receiving portion 40b are arcs centered on the support shaft 30a.

  In addition, an opening 40c is formed by a notch at the center of the inner arc surface of the T-shaped protrusion receiving portion 40b, and an opening 40d by a notch is formed at the center of the outer arc surface. ing. The open portion 40c is formed wider than the open portion 40d. The open portion 40c is sized to allow the T-shaped protrusion 40a to be inserted, and the open portion 40d is sized to prevent the T-shaped protrusion 40a from being inserted. is there.

  The lock portion 50 includes an engagement piece 50 a extending from a part of the T-shaped protrusion receiving portion 40 b and a protrusion piece 50 b protruding in a hook shape from a part of the side surface of the long support 24. The engagement piece 50a is in the vicinity of a portion that comes into contact with the long support 24 when the mounting portion 30 is rotated upward, specifically, the length of the outer arc surface in the sector shape of the T-shaped projection receiving portion 40b. It extends along the plane on the long support 24 side in the T-shaped projection receiving portion 40b from the end on the scale support 24 side.

  The main body device 25 is attached to the work vehicle 2 via the attachment portion 30 and the long support 24 and can be used for ground improvement. Here, the ground improvement machine 1 can move the main body device 25 in the horizontal direction in a state where the long support 24 can swing around the support shaft 30a of the mounting portion 30 as shown in FIG. Since it cannot do, it is necessary to connect the elongate support body 24 and the attaching part 30. FIG.

FIG. 2 is an explanatory view showing a method of connecting the long support 24 and the attachment portion 30.
According to the present embodiment, there are two methods for connecting the long support 24 and the attachment portion 30.

  One is a method of engaging the engaging piece 50a and the protruding piece 50b of the lock portion 50 with each other. First, the cylinder 10 (see FIG. 1) is expanded and contracted to rotate the mounting portion 30 upward, and the T-shaped protrusion receiving portion 40b is brought into contact with the long support 24 as shown in FIG. At this time, the engaging piece 50a and the protruding piece 50b face each other. Next, the main body device 25 is lowered while maintaining the contact state, and the main body device 25 is brought into contact with the ground. Further, when the mounting portion 30 is further lowered, the engaging piece 50a approaches the protruding piece 50b, and the support shaft 30a is positioned at the lowest position of the long hole 24a, as shown in FIG. The engaging piece 50a and the protruding piece 50b are engaged with each other. Thereby, the long support body 24 is connected to the attachment part 30, and rotation of the long support body 24 with respect to the attachment part 30 is regulated.

  The other is a method of storing the T-shaped protrusion 40a in the rotation restricting portion 40 in the T-shaped protrusion receiving portion 40b. First, the cylinder 10 is expanded and contracted to rotate the mounting portion 30 downward, so that the T-shaped protrusion 40a faces the open portion 40c as shown in FIG. Next, the main body device 25 is lowered, the main body device 25 is brought into contact with the ground, and the mounting portion 30 is further lowered, so that the T-shaped protrusion 40a becomes a T-shaped protrusion as shown in FIG. When approaching the receiving part 40b and the support shaft 30a is positioned at the lowest position of the long hole 24a, the T-shaped protrusion 40a is accommodated in the T-shaped protrusion receiving part 40b. Thereby, the long support body 24 engages with the attachment part 30, and rotation of the long support body 24 with respect to the attachment part 30 is regulated.

Next, the ground improvement method using the ground improvement machine of this embodiment is demonstrated.
When implementing the ground improvement, the worker attaches the main body device 25 to the work vehicle 2 via the attachment portion 30 and the long support 24 as shown in FIG. 1 or FIG. At this time, since the long support body 24 is swingable with respect to the attachment portion 30, the main body device 25 is lowered and the main body device 25 is brought into contact with the ground. The mounting portion 30 is rotated by operating the vehicle 2, and the mounting portion 30 and the long support 24 are connected by the rotation restricting portion 40 or the lock portion 50.

  Here, in the case where the ground is improved at a shallow depth, when the tip of the arm 7 is oriented in a direction inclined upward with respect to the horizontal direction, the attachment portion 30 is rotated upward, and FIG. As shown in FIG. 3, the protrusion 30b is opposed to the engagement piece 50a, and the attachment portion 30 is lowered while maintaining the state where the T-shaped protrusion receiving portion 40b is in contact with the long support 24. As shown in FIG. 5, the protruding piece 50b and the engaging piece 50a are engaged. That is, the lock unit 50 is brought into a locked state. Then, the basic posture is a state in which the long support body 24 is oriented in the vertical direction, and the operator operates the work vehicle 2 and swings the main body device 25 to excavate and agitate the ground to remove the land improver and the soil. Stir and mix. When the improvement of the ground at one location is completed, the main body device 25 is moved to the subsequent ground improvement location by the movement of the work vehicle 2 and the ground improvement is started.

  When the main body device 25 reaches a predetermined depth and the arm 7 is inclined so as to face downward with respect to the horizontal direction, as shown in FIG. 2B, the protruding piece 50b and the engaging piece It is difficult to maintain the basic posture of the long support 24 while maintaining the state in which the 50a is engaged. In such a case, the operator operates the work vehicle 2 to move the attachment portion 30 upward to release the locked state between the protruding piece 50b and the engaging piece 50a. Next, the worker operates the work vehicle 2 to rotate the mounting portion 30 downward as shown in FIG. 3A, and the T-shaped protrusion 40a is opposed to the opening portion 40c. At this time, the support shaft 30 a is positioned at the lowest position with respect to the tip of the arm 7. Then, by further lowering the attachment portion 30 downward, as shown in FIG. 3A, the T-shaped projection 40a is accommodated in the T-shaped projection receiving portion 40b. At this time, the central portion of the T-shaped protrusion 40a connected to the long support 24 is rotatable within the range of the open portion 40c, but at least one of both end portions of the T-shaped protrusion 40a is a T-shaped protrusion receiving portion. 40b is engaged. For this reason, when the main body device 25 is swung, the T-shaped protrusion 40a does not come off from the T-shaped protrusion receiving portion 40b.

  FIG. 6 shows a case where the main body device 25 reaches the maximum depth that can be improved by the ground improvement machine of the present embodiment. When the main body device 25 reaches the maximum depth, as shown in FIG. 6, the arm 7 is oriented in the vertical direction, and the boom 5 is inclined to the maximum. In other words, it is possible to position the main body device 25 at a position deeper than the prior art by the length of the long support 24 plus the length of the mounting portion 30 and the arm 7.

  When the main body device 25 reaches the maximum depth, the main body device 25 can be swung by expanding and contracting the cylinder 8 and the cylinder 10.

  According to the present embodiment configured as described above, the main body device 25 can be positioned deeper than the length of the long support 24 plus the length of the mounting portion 30 and the arm 7. become. For this reason, for example, when the elongate support body 24 consists of one elongate member, it becomes possible to arrange | position the main body apparatus 25 in a deep position. Specifically, if the conventional ground improvement machine 100 shown in FIG. 7 can excavate to a depth of 10 m to improve the soil, the ground improvement machine 1 of the present embodiment excavates to a depth of 13 m. It becomes possible to improve the soil.

  Moreover, according to this embodiment, since the elongate support body 24 consists of one columnar body which consists of SN steel, the weight reduction of the ground stirring apparatus 23 can be achieved. Moreover, according to this embodiment, by having the rotation control part 40 and the lock | rock part 50, a worker is long with respect to the attachment part 30 by operation of the work vehicle 2, without touching the ground stirring apparatus 23 directly. Both can be connected and disconnected so that the rotation of the support 24 is restricted.

DESCRIPTION OF SYMBOLS 1,100 Ground improvement machine 2 Work vehicle 3 Traveling part 4 Main body part 5 Boom 6, 8, 10 Cylinder 7 Arm 8 Cylinder 9, 23 Ground stirring apparatus 10a Connecting member 12 Support body 13 Stirring body 24 Long support body 24a Long Hole 25 Main body device 26 Stirrer 27 Intermediate shaft 28 Hydraulic motor 30 Mounting portion 30a Support shaft 40 Rotation restricting portion 40a T-shaped protrusion 40b T-shaped protrusion receiving portion 40c, 40d Opening portion 50 Lock portion 50a Engagement piece 50b Projection piece

Claims (3)

A work vehicle having an arm that operates by driving a cylinder, and a ground agitation device attached to the tip of the arm. The ground agitation device is moved up and down by driving the cylinder, and the ground is improved by the ground agitation device. In the ground improvement machine,
The ground agitator is
A main unit for stirring the ground,
An attachment part rotatably connected to the tip of the arm and moved up and down by driving the cylinder;
A long support body in which the main body device is fixed to one end portion and the other end portion is rotatably connected to a support shaft formed in the attachment portion;
When the attachment portion is rotated downward and the support shaft is positioned at the lowest position with respect to the tip of the arm, a part of the attachment portion and a part of the support body are engaged. A rotation restricting portion for restricting the rotation of the support relative to the attachment portion;
When the attachment portion is rotated upward and the tip of the arm is inclined upward by a predetermined angle with respect to the horizontal direction, a part of the attachment portion and a part of the support are engaged. Then, a ground improvement machine characterized by comprising a locking portion that connects the mounting portion and the support. The support has an elongated hole in which the support shaft is inserted at the other end and extends along the support.
The rotation restricting portion is formed between a T-shaped protrusion protruding from the other end of the support body and a connecting portion of the mounting portion between the support shaft and the tip of the arm, and inserts the protrusion. And a receiving portion that protrudes in a cylindrical shape having an open portion,
When the mounting portion is rotated downward and the support shaft is positioned at the lowest position with respect to the tip of the arm, the projection faces the open portion, and the mounting portion is lowered to lower the support shaft. The ground improvement machine according to claim 1, wherein the protrusion is positioned inside the receiving portion when positioned at a lowermost position of the long hole. The lock portion is formed on the support body, an engagement piece extending from the vicinity of a portion that contacts the support body when the mounting section of the receiving section is rotated upward, and the mounting section And a hook-shaped projecting piece that faces the engagement piece when the upper part is pivoted upward and brought into contact with the support.
When the mounting portion is rotated upward to contact the support, and the mounting portion is lowered and the support shaft is positioned at the lowest position of the elongated hole, the engagement piece becomes the protruding piece. The ground improvement machine according to claim 2, wherein the ground improvement machine is engaged.

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