JP2010216127A - Excavator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an excavator in which a lifting wire can be easily attached to an earth auger disposed under the upper frame of a frame for increasing a construction efficiency. <P>SOLUTION: This excavator includes a base machine, a gantry frame 20 on which an upper frame 23 is supported by columns, a lifting wire 30 extending through the opening 23a of the upper frame 23, a hook 40 attached to the lifting wire 30, and the earth auger supported by the hook 40. The lifting wire 30 is wrapped around a base side pulley attached to an arm and a hook side pulley provided to the hook. A first guide member 81 for guiding the lifting wire 30 toward a hook side pulley group 43 and a second guide member 85 for guiding the lifting wire 30 toward a base side pulley group are disposed above the opening 23a of the upper frame 23. The guide members 81, 85 are detachably attached to the upper frame 23. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an excavation apparatus for excavating the ground.

  The excavator for excavating a vertical hole in the ground includes a base machine having an arm, a lifting wire suspended from the tip of the arm, a hook attached to the lower end of the lifting wire, and supported by the hook There is a type in which a vertical hole is excavated in the ground by an excavating member such as an auger screw attached to an output shaft of the earth auger (see, for example, Patent Document 1).

In addition, as a conventional excavator, a portal frame that supports the upper frame is attached to the tip of the arm by two struts standing on the ground at a predetermined interval, and an earth auger is attached to each strut. There is something that is raised and lowered along.
In the excavator using the portal frame, the lifting wire extended from the tip of the crane is wound around the pulley group provided on the upper frame and the pulley group provided on the earth auger. The lifting wire is attached to the earth auger arranged below the upper frame.

JP 2002-070468 A (paragraph 0011, FIG. 1)

  In the conventional excavator equipped with the portal frame, it is necessary to hang up / down wires around the pulley group of the upper frame body and the pulley group of the earth auger at the construction site. There is a problem that becomes low.

  Therefore, in the present invention, an excavation apparatus that solves the above-described problem and can easily attach a lifting wire to an earth auger disposed below the upper frame of the frame, thereby improving construction efficiency. It is an issue to provide.

  In order to solve the above-mentioned problem, the present invention is an excavation apparatus, in which an upper frame body is supported by a base machine having an arm and a support column erected on the ground, and a tip portion of the arm is supported on the upper frame body. A connected frame, a lifting wire suspended from the tip of the arm, passing through an opening formed in the upper frame in the vertical direction, and extending below the upper frame, A hook attached to a lower end portion of the lifting wire; and an earth auger supported by the hook, and the grounding wire is fed or wound by the hoisting device of the base machine. The auger can be moved up and down along the support column, and the wire for lifting is hung around a base side pulley attached to the tip of the arm and a hook side pulley provided on the hook. A first guide member that guides the lifting wire extended from the base side pulley vertically downward toward the hook side pulley above the opening of the upper frame, and the hook A second guide member that guides the lifting wire extending vertically upward from the side pulley toward the base side pulley, and the first guide member and the second guide member are It is characterized by being detachably attached to the frame.

  In order to solve the above-described problem, another configuration of the present invention is an excavation apparatus, in which an upper frame body is supported by a base machine having an arm and a support column erected on the ground. A frame connected to the tip of the arm, and a frame suspended from the tip of the arm, passing through an opening formed in the upper frame in the vertical direction, and extending below the upper frame. A lifting wire, a hook attached to a lower end of the lifting wire, and an earth auger supported by the hook, and the lifting wire is fed or wound by a hoisting device of the base machine. The earth auger can be moved up and down along the column by taking the wire, and the lifting wire includes a base side pulley attached to the tip of the arm, and a hook side pulley provided on the hook. A first guide that guides the lifting wire extending from the base side pulley vertically downward toward the hook side pulley above the opening of the upper frame. And a second guide member that guides the lifting wire extending vertically upward from the hook side pulley toward the base side pulley, the first guide member and the second guide The member is characterized in that the member is attached to the upper frame body so as to be movable forward and backward above the opening.

In these configurations, by removing or retracting the first guide member and the second guide member from above the opening of the upper frame, the upper portion of the opening of the upper frame can be made empty. Then, the hook attached to the lower end of the lifting wire can be inserted into the opening from above the upper frame body, and the hook can be attached to the earth auger below the upper frame body. Therefore, since it is not necessary to remove the lifting wire from the hook and attach it to the earth auger, it becomes easy to divert the existing crane to the base machine, increasing the construction efficiency and reducing the manufacturing cost.
In addition, after the hook is inserted through the opening of the upper frame, the first guide member and the second guide member are attached or advanced above the opening, and the lifting wire is passed over each guide member. The lifting wire can be extended vertically between the posts. Therefore, even when the position of the tip of the arm is separated from the frame in the lateral direction, the lifting wire can be extended vertically below the upper frame.
Further, since the hook can be easily detached from the earth auger and the frame, the base machine can be used as a lifting machine at the construction site.

  In the excavating apparatus described above, when the first guide member and the second guide member are pulleys around which the lifting wire is stretched, the lifting wire can be reliably guided.

  According to the excavation apparatus of the present invention, it is not necessary to remove the lifting wire from the hook and attach it to the earth auger, so that it becomes easy to divert an existing crane to a base machine, increasing the construction efficiency and reducing the manufacturing cost. be able to. Further, even when the position of the tip of the arm is laterally separated from the frame, the lifting wire can be extended vertically between the columns. Furthermore, since the hook can be easily detached from the earth auger and the frame, the base machine can be used as a lifting machine at the construction site.

It is the side view which showed the excavation apparatus of this embodiment. It is the front view which showed the excavation apparatus of this embodiment. It is the side view which showed the connection state of the front-end | tip part of an arm and the upper frame in the excavation apparatus of this embodiment. It is the figure which showed the upper frame in the excavation apparatus of this embodiment, (a) is a top view of the state which attached each guide member, (b) is a top view of the state which removed each guide member. It is the figure which showed the support bracket of the upper frame in the excavation apparatus of this embodiment, (a) is a front view before attaching a guide member, (b) is a front view of the state which attached the guide member. In the excavation apparatus of this embodiment, it is the figure which showed the process of assembling a hook with a portal frame, (a) is a side view of the aspect which penetrates a hook through the opening part of an upper frame, (b) is each guide member. It is the side view which showed the aspect attached to an upper frame. It is the top view which showed the support bracket of other embodiment.

Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
This embodiment demonstrates the excavation apparatus used when excavating the vertical hole for embedding a pile in the ground. In the following description, the front end side of the arm of the base machine is the front, and the width direction of the base machine is the left-right width direction.

  As shown in FIG. 1, the excavator 1 includes a base machine 10 having an arm 11 and a portal frame 20 connected to the tip of the arm 11. 11 (refer to FIG. 1), a hook 40 is attached to the lower end portion of the lifting wire 30 suspended from the tip end portion thereof, and the lifting wire 30 is fed or wound by a hoisting device (not shown) of the base machine 10. By taking it, the earth auger 50 supported by the hook 40 can be raised and lowered.

As shown in FIG. 1, the base machine 10 is an existing mobile crane (rough terrain crane in this embodiment), and an arm 11 that can be tilted in the vertical direction and telescopic in the longitudinal direction can be turned in the horizontal direction. The revolving body 12 is attached.
The revolving body 12 is provided with a hoisting device (not shown) around which the proximal end sides of the lifting wire 30 (see FIG. 2) and the suspension wire 60 (see FIG. 3) are wound.

  As shown in FIG. 3, a connection bracket 70 is fixed to the tip of the arm 11. The connection bracket 70 has plate-like left and right side wall members 70a and 70a (see FIG. 5A) arranged at a predetermined interval in the left and right width direction, and the upper portions of the left and right side wall members 70a and 70a are arms. 11 is pin-joined at the tip, and the lower part is extended so as to protrude vertically downward with the arm 11 disposed horizontally.

A base-side first pulley 71 and a base-side second pulley 72 that are rotatable about an axis in the left-right width direction are pivotally supported at the upper end portion of the connection bracket 70.
A base-side pulley group 73 in which a plurality of pulleys that are rotatable around an axis in the left-right width direction is pivotally supported at an intermediate portion in the longitudinal direction (height direction) of the connecting bracket 70.
In the connection bracket 70, a base-side guide pulley 74 that is rotatable about an axis in the left-right width direction is pivotally supported on the upper front side of the base-side pulley group 73.
Furthermore, attachment holes 70b and 70b (see FIG. 5A) penetrating in the left-right width direction are formed at the lower ends of the left and right side wall members 70a and 70a (see FIG. 5A) of the connection bracket 70, respectively. Yes.

  As shown in FIG. 2, the portal frame 20 is separated from a plate-like bottom plate 21 placed on the ground, and two columns 22 erected on the upper surface of the bottom plate 21 with a predetermined interval in the left-right width direction. , 22 and an upper frame body 23 supported by the upper end portions of the support columns 22, 22.

  The column 22 is a member having a rectangular cross section, and is a known leader having guide rails 22a attached to four corners, and can be divided in the vertical direction.

  As shown in FIG. 3, an opening 23 a penetrating in the vertical direction is formed at the center of the upper frame 23 in the left-right width direction. As shown in FIG. 4B, the opening 23a is formed in a circular shape in plan view, and has a size through which a hook 40 (see FIG. 2) described later can pass.

As shown in FIG. 2, a box-shaped support bracket 80 is attached to the center of the upper surface of the upper frame body 23 in the width direction so as to be rotatable about a vertical axis.
As shown in FIG. 4A, the support bracket 80 has a front side wall member 82 and left and right side wall members 83, 83, and an opening 23a is exposed on the lower surface.

A first guide member 81, which is a pulley group in which a plurality of pulleys 81 a... That are rotatable around an axis in the left-right width direction, are arranged in the center portion of the support bracket 80. It is detachably attached to the inner side surfaces 83a and 83a.
As shown in FIG. 5A, each pulley 81a... Of the first guide member 81 is externally fitted to a cylindrical support shaft 81b in which a central hole 81c penetrates in the axial direction.

U-shaped receiving portions 83b and 83b that support both end portions of the support shaft 81b project from the inner side surfaces 83a and 83a of the left and right side wall members 83 and 83 of the support bracket 80 (see FIG. 6A). . The left and right side wall members 83, 83 of the support bracket 80 are respectively provided with mounting holes 83c, 83c communicating with the center hole 81c of the support shaft 81b when the support shaft 81b is supported by the receiving portions 83b, 83b. ing.
The upper ends of the left and right side wall members 83, 83 of the support bracket 80 are disposed between the left and right side wall members 70a, 70a of the connection bracket 70, and the mounting holes 83c, 83c of the support bracket 80 and the mounting holes 70b, 70b of the connection bracket 70 are arranged. And communicate with each other.

  5B, both ends of the support shaft 81b of the first guide member 81 are supported by the receiving portions 83b and 83b of the support bracket 80, and the mounting holes 70b and 70b of the connection bracket 70 are supported. The connecting pin 84 is inserted into the center hole 81 c of the shaft 81 b and the mounting holes 83 c and 83 c of the support bracket 80. Accordingly, the first guide member 81 is attached in the support bracket 80 and the lower end portion of the connection bracket 70 is attached to the support bracket 80 so as to be rotatable.

  Here, as shown in FIG. 1, when the upper frame body 23 of the portal frame 20 is attached to the distal end portion of the arm 11 of the base machine 10 via the connection bracket 70, the portal frame 20 is the distal end of the arm 11. It is arrange | positioned ahead from the part. Thus, by separating the position of the tip of the arm 11 backward with respect to the upper frame body 23 of the portal frame 20, interference between the upper frame body 23 and the arm 11 can be prevented.

In addition, as shown in FIG. 4A, in the support bracket 80, a plurality of pulleys 85a, which are rotatable around an axis in the left-right width direction are provided below the rear side of the first guide member 81 (see FIG. 3). A second guide member 85 which is a pulley group in which.
The second guide member 85 has the same configuration as the first guide member 81 described above, and projects from the inner side surfaces 83 a and 83 a of the left and right side wall members 83 and 83 of the support bracket 80 in the same manner as the first guide member 81. The U-shaped receiving portions 83d and 83d (see FIG. 6B) are supported.

  A front bracket 86a projects from the front central portion of the front side wall member 82 of the support bracket 80, and a frame side guide pulley 86 that is rotatable about a left-right axis is supported on the front bracket 86a. ing.

  As shown in FIG. 3, the hook 40 includes a hook block 41 and a hook body 42 supported by the hook block 41, and the hook block 41 is rotatable around an axis in the left-right width direction. A hook side pulley group 43 in which a plurality of pulleys are arranged in parallel is pivotally supported.

The hook 40 is attached to the lower end portion of the lifting wire 30 suspended from the tip of the arm 11, and the lifting wire 30 is fed or wound up by the hoisting device of the base machine 10 (see FIG. 1). Thus, the hook 40 can be moved up and down.
Specifically, the front end side of the lifting wire 30 drawn from the front end portion of the arm 11 is stretched over the upper side portion of the base side first pulley 71, so that the front side obliquely downward toward the base side pulley group 73. Guided by Further, the lifting wire 30 hung on the base side pulley group 73 is hung on the upper portion of the first guide member 81 in the support bracket 80, so that it is perpendicular to the hook side pulley group 43 of the hook 40. It is guided downward and is passed over the hook side pulley group 43. Furthermore, the elevating wire 30 drawn vertically upward from the hook side pulley group 43 is hung on the upper side portion of the second guide member 85 in the support bracket 80, so that the rear side toward the base side pulley group 73. It is guided obliquely upward and is passed over the base side pulley group 73. Then, the elevating wire 30 is sequentially wound around the pulleys of the base side pulley group 73 and the pulleys of the hook side pulley group 43, and then the tip of the elevating wire 30 is fixed to the base side pulley group 73. Thus, the hook 40 is attached to the lower end portion of the lifting wire 30, and the hook 40 can be lifted or lowered by feeding or winding the lifting wire 30.

  Further, the tip end side of the suspension wire 60 drawn from the tip end portion of the arm 11 is stretched over the upper side portion of the base side second pulley 72, thereby being guided obliquely downward on the front side toward the base side guide pulley 74. . Further, the suspension wire 60 hanged on the base side guide pulley 74 is guided vertically downward by being hanged on the upper part of the frame side guide pulley 86 pivotally supported on the front surface of the support bracket 80. An auxiliary hook 90 for lifting the auger screw 54 and the pile is attached to the tip of the hanging wire 60, and the auxiliary hook 90 can be moved up and down by feeding or winding the hanging wire 60.

  The earth auger 50 shown in FIG. 2 is slidably attached to a drive motor 52 having an output shaft 51 arranged in the vertical direction in the axial direction, and guide rails 22a on the inner side of the columns 22, 22. Left and right slide portions 53, 53.

The drive motor 52 is a known motor in which the output shaft 51 rotates about its axis. In this embodiment, a hydraulic motor is used. However, the drive system such as an electric motor is not limited. .
In addition, on the upper surface of the drive motor 52, an annular hanging metal fitting 55 projects. By attaching the hook body 42 of the hook 40 to the hanging metal fitting 55, the earth auger 50 is supported by the hook 40. In this way, the lifting wire 30 is attached to the earth auger 50, and the grounding auger 50 can be lifted and lowered along the columns 22, 22 by feeding or winding the lifting wire 30.

  The auger screw 54 is an existing excavation member whose upper end is fixed to the output shaft 51 of the drive motor 52, and rotates around the axis in conjunction with the rotation of the output shaft 51. A spiral excavation blade 54 a is attached to the outer peripheral surface of the auger screw 54.

Next, a method for attaching the hook 40 to the earth auger 50 will be described.
First, as shown in FIG. 6A, the upper frame body 23 attached to the distal end portion of the arm 11 is placed on the ground, and the first guide member 81 and the second guide member 81 are inserted from the support bracket 80 of the upper frame body 23. The guide member 85 (see FIG. 3) is removed, and the upper portion of the opening 23a of the upper frame body 23 is opened (see FIG. 4B).
Then, the hook 40 is inserted into the support bracket 80 from above the upper frame body 23, and the hook 40 is inserted through the opening 23a of the upper frame body 23 as shown in FIG. It is arranged below the frame body 23. As a result, the lifting wire 30 passes through the opening 23a of the upper frame 23 in the vertical direction.
Thereafter, as shown in FIG. 4A, the first guide member 81 and the second guide member 85 are inserted into the support bracket 80 from above the upper frame body 23 and attached to the upper portion of the opening 23a. As shown in FIG. 5B, the lower end portion of the connection bracket 70 is attached to the support bracket 80 so as to be rotatable. Further, as shown in FIG. 3, with the hook 40 placed on the ground and the lifting wire 30 being slackened, the lifting wire 30 is passed over the first guide member 81 and the second guide member 85.
After attaching the first guide member 81 and the second guide member 85 to the support bracket 80 of the upper frame body 23, as shown in FIG. Are arranged at a predetermined height. Further, the earth auger 50 is slidably attached to each of the columns 22, 22, and the hook 40 is attached to the hanging bracket 55 of the earth auger 50.

  According to the excavation apparatus 1 of the present embodiment, as shown in FIG. 6A, the upper frame body is obtained by removing the first guide member 81 and the second guide member 85 from the upper frame body 23 of the portal frame 20. The upper part of the opening part 23a of 23 can be vacated. Then, the hook 40 attached to the lower end of the lifting wire 30 is inserted into the opening 23a from above the upper frame 23, and the hook 40 is attached to the earth auger 50 (see FIG. 2) below the upper frame 23. Can be attached. Therefore, since it is not necessary to remove the lifting wire 30 from the hook 40 and attach it to the earth auger 50, it becomes easy to divert the existing crane to the base machine 10 (see FIG. 1), improving the construction efficiency and reducing the manufacturing cost. Can be reduced.

  Further, as shown in FIG. 6B, after the hook 40 is inserted into the opening 23a of the upper frame 23, the guide members 81 and 85 are attached above the opening 23a, and the lifting wire 30 is attached to each of the lifting wires 30. As shown in FIG. 2, the lifting wire 30 can be vertically extended between the support posts 22 and 22 of the portal frame 20 by being hung on the guide members 81 and 85. Therefore, even when the position of the distal end portion of the arm 11 (see FIG. 1) is separated rearward from the portal frame 20, the lifting wire 30 can be extended vertically between the support columns 22 and 22.

  Moreover, since the hook 40 can be easily removed from the earth auger 50 and the gate-type frame 20, the base machine 10 (see FIG. 1) can be used as a lifting machine at the construction site.

  Further, in the excavation apparatus 1 of the present embodiment, as shown in FIG. 1, the upper frame body 23 is rotatable about the vertical axis with respect to the support bracket 80 to which the distal end portion of the arm 11 is connected. Therefore, the direction of the portal frame 20 can be changed with respect to the distal end portion of the arm 11. Thereby, since the position of the earth auger 50 (refer FIG. 2) can be finely adjusted, construction accuracy can be improved.

The embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.
For example, in this embodiment, as shown in FIG. 5B, the first guide member 81 and the second guide member 85 are detachably attached to the support bracket 80, but as shown in FIG. The first guide member 81 and the second guide member 85 may be attached to the upper frame body 23 so as to be capable of advancing and retracting above the opening 23a.

  Specifically, rotary shafts 87 and 87 whose axial directions are arranged in the vertical direction are attached to the inner side surface 83 a of one side wall member 83 of the support bracket 80, and each guide is attached to the two rotary shafts 87 and 87. The end portions of the members 81 and 85 are pivotally supported so as to be rotatable in the horizontal direction. FIG. 7 shows a state in which the guide members 81 and 85 are retracted from above the opening 23a. By rotating the guide members 81 and 85 from above to the upper part of the opening 23a, the guide members 81 and 85 are rotated. 81 and 85 can be advanced above the opening 23a. Therefore, the guide members 81 and 85 can be easily attached to the support bracket 80.

  Note that, as a configuration in which the guide members 81 and 85 are advanced and retracted above the opening 23a of the upper frame 23, a guide rail is provided in the support bracket 80, and the guide members 81 and 85 are opened along the guide rail. The guide members 81 and 85 can be moved back and forth above the opening portion 23a by sliding and moving upward.

  Moreover, in this embodiment, as shown to Fig.4 (a), the raising / lowering wire 30 (refer FIG. 3) is reliably guided by comprising the 1st guide member 81 and the 2nd guide member 85 by a pulley group. However, the guide member only needs to have a guide surface for guiding the lifting wire 30, and the shape thereof is not limited.

  In the present embodiment, as shown in FIG. 3, the lifting wire 30 is wound around the base side pulley group 73 attached to the tip of the arm 11 and the hook side pulley group 43 provided on the hook 40. However, the number of pulleys in each of the pulley groups 73 and 43 is not limited. Furthermore, as long as the base machine 10 can raise and lower the earth auger 50 (see FIG. 2), the raising and lowering wires 30 may be wound around the integral base side pulley and hook side pulley, respectively.

  Further, in the present embodiment, as shown in FIG. 2, a portal frame 20 is used that supports the upper frame body 23 by two support columns 22, 22 spaced apart from each other by a predetermined distance in the left-right width direction. The upper frame may be supported by a single column, and the number of columns that support the upper frame 23 is not limited.

  Moreover, in this embodiment, as shown in FIG. 2, it is comprised so that the auger screw 54 may be attached to the earth auger 50, and a vertical hole may be excavated, However, The excavation member attached to the earth auger 50 is not limited. Alternatively, the upper end portion of the cylindrical casing can be attached to the output shaft 51, the surrounding pile can be excavated by the rotating casing, and the existing pile can be cut off from the ground.

DESCRIPTION OF SYMBOLS 1 Excavator 10 Base machine 11 Arm 20 Portal frame (frame)
22 support 23 upper frame 23a opening 30 lifting wire 40 hook 43 hook side pulley group 50 earth auger 54 auger screw 60 hanging wire 70 connection bracket 71 base side first pulley 72 base side second pulley 73 base side pulley group 74 Base side guide pulley 80 Support bracket 81 First guide member 81b Support shaft 84 Connecting pin 85 Second guide member 86 Frame side guide pulley 90 Auxiliary hook

Claims (3)

A base machine having an arm;
A frame in which an upper frame body is supported by a support column erected on the ground, and a tip portion of the arm is coupled to the upper frame body;
A lifting wire that is suspended from the tip of the arm, passes vertically through an opening formed in the upper frame, and extends below the upper frame;
A hook attached to the lower end of the lifting wire;
An earth auger supported by the hook,
The ground auger can be moved up and down along the support column by unwinding or winding the lifting wire by the hoisting device of the base machine,
The lifting wire is wound around a base side pulley attached to the tip of the arm and a hook side pulley provided on the hook,
Above the opening of the upper frame,
A first guide member for vertically guiding the lifting wire extended from the base side pulley toward the hook side pulley;
A second guide member that guides the elevating wire extending vertically upward from the hook side pulley toward the base side pulley; and
The excavator according to claim 1, wherein the first guide member and the second guide member are detachably attached to the upper frame body. A base machine having an arm;
A frame in which an upper frame body is supported by a support column erected on the ground, and a tip portion of the arm is coupled to the upper frame body;
A lifting wire that is suspended from the tip of the arm, passes vertically through an opening formed in the upper frame, and extends below the upper frame;
A hook attached to the lower end of the lifting wire;
An earth auger supported by the hook,
The ground auger can be moved up and down along the support column by unwinding or winding the lifting wire by the hoisting device of the base machine,
The lifting wire is wound around a base side pulley attached to the tip of the arm and a hook side pulley provided on the hook,
Above the opening of the upper frame,
A first guide member for vertically guiding the lifting wire extended from the base side pulley toward the hook side pulley;
A second guide member that guides the elevating wire extending vertically upward from the hook side pulley toward the base side pulley; and
The excavator according to claim 1, wherein the first guide member and the second guide member are attached to the upper frame body so as to be capable of moving forward and backward above the opening.   The excavation apparatus according to claim 1 or 2, wherein the first guide member and the second guide member are pulleys around which the lifting wire is stretched.

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